Atwood Water Heater Service
Transcript of Atwood Water Heater Service
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September 2003
INTRODUCTION
The 2004 ed ition o f the Atw oo d Wa ter Heate r Service Manua l is a res ource c rea ted to
help service technicians identify Atwood product by serial number, diagnose service
prob lems and efficiently a nd effec tively proces s w arra nty claims.
In 2003, Atwo od reloc a ted the S w itch, Thermosta t a nd EC O that w a s insta lled on the
ba ck of comb ina tion 6 a nd 10 ga llon G a s/Elec tric Wa ter Heate rs. A do uble sw itch is
now loc a ted inside the RV for convenience and a joint ECO a nd T-Stat is loc ated on
the g as side of the w a ter heater. This lea ves only the relay a nd hea ting element on the
backside of the water heater.
Eac h of the ma nuals within this se ries offers a ge neral overview of the product a s w ell
as more specific product information. For each product within the manual, you will
find model identification, recommended tools and equipment, a sequence of
operation, wa rnings , a nnual ma intenanc e proced ures , pa rts a nd troubles hootingguides , w arra nty proc edures, flat rate s ched ules , a nd replac ement pa rt reference
charts.
Due to the rapidly c hang ing persona l computer revolution w e ha ve plac ed
troubles hooting information in a variety of place s to ma ke sure tha t the mos t a cc urate
information is a vaila ble. The b es t pla ce to find the current informa tion a bo ut Atw oo d
products is our website: www.atwoodmobile.com. At our website brochures may be
do wnload ed, trouble s hooting guides review ed a nd the lates t information bulletins ca n
be read. In addition all Atwood Authorized Service Centers are listed on our site,
ac ces sible via an ea sy-to-use s earch system.
S ervice for all Atwo od prod ucts is hand led out of our Roc kford loc ation. S hould youhave any q uestions reg arding our prod ucts or the informa tion c onta ined in this
ma nua l simply dia l 1-800-825-4328. Be sure to have the Model a nd Serial Number whenyou call.
Atwood Service Department
Disclaimer: The data presented in this publication is obtained from the most reliable sources, and is believed to be accurate as of thedate of publication. Responsibility for typographical errors or omission of data cannot be assumed by the publishers.
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NOTES
THIS PAGE INTENTIONALLY LEFT B LANK
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TABLE OF CONTENTS
Atwood Water Heaters
Atwood Letter 1
Aftermarket Model Identification 4
Pilot Models
Ques tions 5Model Number Expla na tion /Fea tures 6
Recommended Tools &Eq uipment 7
G a s Thermos ta t C ontrols &P ilot Assemblies 8
P ilot S eq uence of Opera tion 9
P ilot &Ma in Burner 10
Trouble S hooting G uide 11
Engine Hea t Excha nge S ys tem /Afterma rket Hea ting Elements 12
Bolt-In Heating Element, Thermostat &ECO /110 VAC Trouble Shooting Wiring Sc hematic 13
Sc rew-In Heating Element, Thermosta t &ECO /110 VAC Trouble S hooting Wiring S chematic 14
Electronic Ignition Models
Ques tions 15
Model Number Expla na tion /Fea tures 16
Recommended Tools &Eq uipment 17
DS I S eq uence of Opera tion 18
Trouble S hooting G uide - Electronic Ig nition 19-20
Informa tion G uide - Intermittent Ignition 21-22
P otted Cha nnel C ircuit B oa rds /Therma l Cut Off Device /Thermos ta t 23
Wiring S chema tics 24
General Water Heater Information
Ques tions 25
Pressure Tempera ture Relie f Va lve /Water Hea ter Tank Corros ion /Atwood Clad Tank 26
Flushing Ta nk /Winterizing Ins truc tions 27
Wa ter Hea ter Terminology 28
Warranty 29
Warranty Procedures 29
Return Goods Policy (RETURN ADDRESS) 30
Flat Rate Schedule 31
Pilot Water Heater Parts Breakdown 32-34Replacement Part Reference
G10B, G10C /G610-3B, GH610-3 /G4SM /G6A-2, G6A-3, G6A-6, G6A-6P, G6A-7, G6A-7P /GC6A, GC6A-3,
G C 6A-6, G C6A-7 /G H6-3, G H6-6, G H6-7 /G C6AA-7, GC 6AA-7P / GC 6AA-8, GC 6AA-8P / G610-3,
GC 10-1, G C10-2, GC 10-2P /G C10A-2 /G C10A-2P /G 10-1, G10-1P, G10-2, G10-2P
Electronic Ignition Water Heater Parts Breakdown 35-37Replacement Part Reference
G610-3E, GH610-3E /GCH6-4E, GCH6-6E, /GC6A-7E /GC6AA-7E /GC6AA-8E /GC6AA-9E, GC6AA-10E
G 6A-2E, G6A-3E, G6A-4E, G 6A-6E, G6A-7E, G6A-8E /G 6A-3E, GH6-3E /G H6-4E, GH6-6E, G H6-7E,
GH6-8E /G CH6A-7E, GC H6A-8E, GC H6A-9E /G CH6A-10E /
GCH10A-2E, GCH10A-3E /GCH10-4E /G10-1E /GH10-2E, GH10-3E / GC10-1E, GC10-2E /GC10A-2E /
GC 10A-3E /G C10A-4E
Service Tank Kit Part Numbers 38
Marine Water Heater Parts Breakdown 39
Atwood Training Tapes and Manuals ORDER BLANK
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Aftermarket Gas Water HeatersIncludes Doors & Switches (when appropriate)
G6A-7 ----------------------------------6 gal. w/pilot
GC6AA-8 ------------------------------6 gal. combo w/pilot
GC6AA-10E ----------------------------6 gal. electronic gas combo
GCH6A-10E----------------------------6 gal. electronic gas combo w/heat exchangeG6A-8E --------------------------------6 gal. electronic
GH6-7 ----------------------------------6 gal. w/pilot, heat exchange
GH6-8E --------------------------------6 gal. electronic w/heat exchange
G10-2----------------------------------10 gal. w/pilot
GC10A-2------------------------------10 gal. combo
G10-3E--------------------------------10 gal. electronic
GC10A-4E ----------------------------10 gal. electronic combo
GCH10A-4E --------------------------10 gal. electronic combo w/heat exchange
Marine Water HeatersEHM6-4WFHX ------------------------4 gal. marine, front heat exchange & special hook-upEHM6-SMFHX ------------------------6 gal. electric marine w/heat exchange
H6-FHX --------------------------------6 gal. marine special
EHM6-ATC ----------------------------6 gal. marine, heat exchange & temp. control
EHM6-SMSS --------------------------6 gal. marine, rear heat exchange & special hook-up
EHM11-SSDHXT --------------------6 gal. marine, stainless steel dual heat exchange tube
EHM11-SMFHX --------------------11 gal. electric marine w/heat exchange
EHM11-SST--------------------------11 gal. electric, heat exchange stainless steel tank
H11-FHX------------------------------11 gal. marine special
EHPM10 ------------------------------11 gal. electric marine w/special tube
EH-20----------------------------------20 gal. electric marine w/heat exchange
E20 ------------------------------------20 gal. electric marine
M arine International Water HeatersEHM6-220-FHX ----------------------6 gal. marine, heat exchange, 220 volts
EHM6-220SST ------------------------6 gal. marine, heat exchange, 220 volts, stainless steel housing
EHM6-220-FHX ----------------------6 gal. marine, heat exchange, 220 volt, 1000 watt element
EHM11-220--------------------------11 gal. marine, heat exchange, 220 volts
EHM11-220SST --------------------11 gal. marine, heat exchange, 220 volts, stainless steel housing
EHM11-220SS-4WFHX ----------11 gal. marine, heat exchange, w/special hook-up
EHM11-220SS-IMFHX ------------11 gal. marine, heat exchange, 220 volt, 1000 watt element
EH20-220 ----------------------------20 gal. marine, heat exchange, 220 voltsE20-220 ------------------------------20 gal. marine, 220 volts
European Water HeatersEURI6A-6E ----------------------------6 gal. International Electronic 3-bar valve
EURIH6-6E ----------------------------6 gal. International Electronic w/heat exchange
EURICH6-6E --------------------------6 gal. International Electronic Combo w/heat exchange
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PILOT M ODELS
QUESTIONS
The following questions should be answered during this portion of the manual:
Are the Robertsha w a nd White Rodg ers thermosta t ga s c ontrol valves inter-cha ngea ble?
What is the minimum ga s press ure required for proper wa ter heater opera tion?
Where on the wa ter heater ga s c ontrol ca n gas press ure be tested ?
Ca n the pilot flame b e ad justed?
Wha t is minimum millivolt output of the thermoc ouple req uired for proper ga s c ontrol ope ration?
How ca n you test a thermoco uple?
How tight should the thermoco uple co nnection be a t the ga s c ontrol?
What is an E.C. O., where is it loc a ted a nd w ha t is its function?
What is a proper ma in burner a ir shutter ad justment?
What is the proper control a nd ma in burner a lignme nt?
How c an you ea sily chec k the ca libration of a c ontrol?
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Atwood 6 and 10 gallon Pilot Water HeatersAtwood water heaters are designed and approved for use only in recreation vehicles (travel trailers, 5th wheels,
moto r homes , etc .). They a re offered in two s izes : 6 and 10 ga llon c a pa cities .
TYPE OF GAS IGNITION -
This unit is ignited outs ide of the tra iler by a ma tc h, piezo ignitor or other ignition device . The w a ter
temperature is a djusta ble at the thermosta t c ontrol.
EXPLANATION OF MODEL NUMBER:
Pilot Models
G C H 6 AA - 7 P
P ilot Relig ht
Version
Type of hea ting element
(G C _ A - _ = bo lt on, G C _ A A-_ = s crew in)
Gallon capacity (6 or 10)
Engine Heat Exchange
Combination gas and 110 VAC electric
Propane Ga s
NOTE: When replac ing the e lement o n a co mbination ga s/110 VAC unit, a lw a ys chec k the ba ckof the hea ter for the type o f element it has . It will either be a bo lt-on or sc rew -in
element. They a re no interchang ea ble.
FEATURES All units operate on propane gas.
A hea t excha nge o ption is a vaila ble for motor homes. The wa ter heater tank must ha ve fac tory eq uipped
heat excha nge tubes welded on it a lrea dy. They ca nnot be a dde d later. A new wa ter heater tank with this
option is the only way to obtain this feature. Skin mounting allows the water heater to be hooked up with plumbing and electrical before the sidewall is
erected.
The ta nk has a clad aluminum lining tha t protects a ga inst c orrosion and does not need to be repla ced on
a yearly or more frequent basis like anode rods do. A more detailed explanation of cladding is found in the
ba ck of this ma nua l.
95% of all servicing can be done on the outside of the water heater. 110 VAC heating components are the
exception since they are located on the back of the water heater inside the trailer.
A flush flange is a vaila ble for all mod els. This ma kes the a cc es s do or flush w ith the trailer sidew a ll.
There a re multiple prote ct ion fea tures in the form of a press ure-temp era ture relief va lve, a limit sw itc h in
the gas thermostat and an externally sealed combustion chamber.
On combina tion wa ter heaters, the ga s mod e a nd the 110 VAC hea ting mode c an be o pera ted a t the same
time since each mode has its own thermostat.
Both the six and ten gallon units have the lightest weight in the industry.
On a ll tra ilers purcha se d a fter J une 1, 1997 Atw ood Limited Wa rra nty is for a period of tw o ye a rs. This
includes all rea sona ble la bor cha rges .
We ha ve 650+ S ervice Centers throughout the United S tates .
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Recommended Tools and Equipment
U-Tube Manometer - This is the mo st a cc ura te d evice for meas uring g a s p ress ure. If you use a dial-typema nometer, it should be ca librated period ica lly w ith this type o f ma nometer.
Thermostat Wrench - This tool a llow s for eas ier and sa fer remova l of the ga s thermos tat control. Ana djusta ble version for d ifferent size co ntrols is a vailab le through mo st RV distributors o r you ma y fa brica te o ne
from a ngle iron. We do not reco mmend using a pipe w rench b eca use it may da mag e the co ntrol caus ing it to
go out of ca libration.
Multi-meter - This is the m os t versa tile me ter and will tes t AC vo lta ge a nd c ontinuity. A co ntinuity tes t ca n beused to test for a blown E.C.O. on a g as control.
Magnet Assembly Thermocouple Tester - This a ss embly ca n be o bta ined a t an electronics or hardw a re sto reThis s a me a ss embly ca n also b e removed from a Rob ertshaw co ntrol. It will verify if a thermoco uple is go od .
For tes ting, s crew a thermoc ouple into the tes ter, hea t the thermocouple for 25 se co nds and then press the
plunger do wn. If the plunger pops up in les s tha t 25 seco nds , the thermocouple is fa ulty.
Common Hand Tools - 1/8 a nd 1/4 nut drivers, open e nd w renches , flat blad e a nd P hillips sc rew drivers.
Leak Test Solution - A solution that bubbles when applied to gas fittings or connections showing when a gasleak is present.
THERMOSTAT WRENCH
76543210
1234567
Manometerconnection
Correctwa terlevel
Fill here
U-TUBE M ANOMETERwith 1/8 pipe nipple
M ULTI-M ETER TO TESTAC VOLTAGE AND CONTINUITY
MAGNET ASSEMBLY TO TESTTHERMOCOUPLE
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Gas Thermostat Controls and Pilot Assemblies
Only tw o ma kes of ga s c ontrols ha ve been used on our pilot mod el water heaters. They a re the Robertsha w
Unitrol a nd White Rod ge r (formerly J a de or ITT).
The Ro be rtsha w c ontrol ca me in tw o d ifferent s izes of g a s inlets: 3/8inverted fla re and 3/8 N.P.T. The
inverted inlet c ontrol is no longer a va ila ble. Therefore, the w a ter hea ter ga s line c onnec tion w ill ha ve to be
mod ified to 3/8 N.P.T. in order to us e the c urrent R ob ertsha w c ontrol.
The White R od ge r co ntrol is the va lve w e a re using o n a ll prod uct ion to da y. Formerly it had a 3/8N.P.T.
inlet. Now it is only a va ila ble w ith a 1/4inlet. This improvem ent e limina tes the a da pter fitting into the c ontrol
a llow ing the use o f only a s ingle 45 de g ree elbow (3/8fla re x 1/4N.P.T.). If yo u a re replac ing a current 1/4
inlet mo de l control w ith a ea rlier mod el 3/8inlet c ontrol you ma y ha ve in stoc k, the a da pter fitting tha t
mates the control and elbow fitting is still available.
Although the controls appear quite different in size, the White Rodger and Robertshaw control are
intercha nge a ble. Their ma nifolds w ill bo th line up w ith the b urner tube prope rly.
Bo th controls have a port to test ga s press ure through the va lve. This ca n be ac complished by removing the
co ver sc rew a nd inserting a 1/8 pipe nipple. After atta ching your ma nomete r hose to this fitting, the
ma nometer s hould reg iste r 10 W.C . through the valve w hile it is opera ting.
There a re tw o m a in pilot a ss emb lies that you w ill encounter in the field.
The first is a n ea rlier mode l Robertsha w pilot a ss emb ly w ith a 1/4pilot g a s line tha t mounted on the left
side of the ma in burner.
The c urrent pilot is the J a de a ss emb ly w ith a 1/8pilot g a s line a nd it mounts on the right s ide of the ma in
burner.
The Rob ertsha w pilot is no long er ava ila ble and the J a de pilot must b e sub st ituted. When insta lling a J a de
a ss embly in pla ce of a Robertshaw as semb ly, if there is not a loca tion on the right s ide of the ma in burner to
mount the J a de pilot, a new burner that ha s the proper mounting holes w ill ha ve to b e purcha sed .
Note: The size of the ga s line do es not ha ve
any affect on the size of the pilot flame. Only
the gas pressure and pilot orifice regulate the
height of the pilot flame.
ROBERTSHAW UNITROL
3/8 Inverted inlet3/8 N.P.T. outlet(no longer available)
3/8 N.P.T. inlet3/8 N.P.T. outlet
WHITE RODGERS (JADE, ITT)
3/8 N.P.T. outlet(no longer available)
1/4 N.P.T. inlet3/8 N.P.T. outlet(replaces all Robertshaw
and J ade controls)
JADE ROBERTSHAW(obsolete, replace with J ade)
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Pilot Sequence of Operation
PILOT OPERATION
Gas Pressure 11 W.C. to control is necessary. Set with two gas appliances running.
Gas Control supplies gas to pilot orifice when control ON/OFF pilot knob is held at pilot position.
Pilot Orifice meters gas to heat thermocouple. Flame should be high enough to engulf thethermocouple.
Thermocouple generates millivoltage to the gas controls magnet assembly.
Magnet when it receives 12 millivolts or more it allows gas to flow freely to pilot withoutholding pilot knob.
E.C.O. passes millivolts through the gas control and back to thermocouple. Tripspermanently open if water temperature exceeds 190F.
MAIN BURNER OPERATION
Gas Control supplies gas to main burner when control knob is set to ON position and thetemperature lever is set to desired temperature after pilot is lit.
Ma in Burner Orifice meters gas through burner tube.
Ma in Burner pilot ignites gas when it reaches end of this tube. Flame height adjusted by sliding airshutter. Ideal setting is 1/4 way open (.20 ). Flam e s hould b e prima rily blue w itha tra ce of yellow.
Temperature Knob setting of knob determines burner cycle and water temperature. Temperature range is70F - 140F.
Pilot Flame
Thermocouple
ON/OFF Pilot Knob
Air Shutter
ONE SHOTE.C.O. 1 90 Gas Inlet
11" W.C.Pressure
JADE CONTROL SYSTEM
Temperature Lever
Pilot Orifice (i nside)
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Pilot and Main Burner
Pilot AdjustmentOnly the gas pressure, gas valve and the pilot orifice regulate the height of the pilot flame. Early model gas
co ntrols ha ve a pilot a djustm ent s crew, b ut this sc rew has very little effect on the p ilot. The pilot
a djustme nt has bee n removed from the c urrent White Rod ge r control. The fla me s hould b e high eno ugh to
engulf the thermoco uple a t a ll times . A pilot flame a ny larger co uld blow the E.C .O. in the g a s co ntrol. This
is typically the result of enlarging the pilot orifice hole with a pin or similar item. For further correctivemeasures, refer to the trouble-shooting guide.
M ain Burner AdjustmentThe g a s press ure, a ir shutter clea nliness of the burner tube a nd o rifice regula te the ma in burner fla me. The
main burner flame should be mainly blue with a trace of yellow and fairly quiet. If it is not, adjust the gas
press ure to 11 W.C. , ens ure tha t the ma in burner air shutter is 1/4 w a y op en a nd verify tha t the ma in
burner flame spreader is square to the end of the main burner. For further corrective measures, refer to the
trouble-shooting g uide .
Main Burner AlignmentThe ma nifold a nd ma in burner sho uld b e a s perfectly aligned a s po ss ible. In other w ords, the g a s va lve
sho uld b e rotated a t the sa me a ngle as the ma in burner tube. If it is not, rota te the ga s c ontrol a nd/or the
orifice holder so that the orifice disperses gas straight down the center of the burner tube. If the valve must
be ba cked off any, check for wa ter lea ks at the coupling the c ontrol screws into before you operate the
wa ter heater.
Pilot Flame
Thermocouple
On/Off Pilot Knob
Air Shutter
Temperature Lever
Flame Spreader
Burner Tube
GasValve
OrificeHolder
MainBurnerTub
e
(orientation found in water heater)
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Guides are only intended for use on Atwood products by service technicians who have successfully completed
Atwood training. This guide s hould be use d in conjunction with the app ropriate Instruction Manua l provide d w ith theprod uct and any a pplica ble Industry stand ards. This is not intended to be a c omplete list. P lea se d irect q uestions
co ncerning s ervice of Atwoo d products to 800-825-4328 before proceeding.
CAUSE SOLUTION
PILOT OUTAGEGas pressure incorrect --------------------------Set pressure to a minimum of 11 W.C. with two or more appliances runningBlocked U tube --------------------------------Remove obstructionImproper main burner alignment --------------Re-align main burner and main burner orifice holder and gas valveImproper air adjustment ------------------------Adjust main burner air shutter approximately 1/4 openWeak thermocouple------------------------------Replace thermocouplePoor pilot flame ----------------------------------Clean or replace pilot orificeWeak gas control magnet ----------------------Replace gas controlDefective E.C.O. in control ----------------------Replace gas control and check the pilot flame. It should be high enough to engulf
the thermocouple at all times.PILOT OUTAGE WHEN BUTTON OR KNOB IS RELEASED
Thermocouple not hot --------------------------Hold button or knob for 30 seconds before releasingThermocouple loose ----------------------------Tighten connection at gas controlWeak thermocouple------------------------------Replace thermocoupleWeak gas control magnet ----------------------Replace gas controlDefective E.C.O. in control ----------------------Replace gas control
MAIN BURNER WILL NOT IGNITEBlocked main burner orifice --------------------Clean or replace orificeMain burner flame spreader mis-alignment --Square flame spreader to end of main burnerBlocked main burner ----------------------------Remove blockageImproper air adjustment ------------------------Adjust main burner air shutter approximately 1/4 openBlocked U tube --------------------------------Remove blockageGas control out of calibration ------------------Replace gas control
ERRATIC M AIN BURNER FLAMEImproper gas pressure--------------------------Set inlet pressure to a minimum of 11 W.C. with two or more appliances runningImproper air adjustment ------------------------Adjust main burner air shutter approximately 1/4 openPartial blockage of main burner ----------------Remove blockagePartial blockage of main burner orifice--------Clean or replace orificeFlame spreader misaligned----------------------Re-align spreader or replace main burnerBlockage in U tube ----------------------------Remove blockagePoor gas supply----------------------------------Replace gas supplyExhaust grille blocked --------------------------Remove blockageImproper main burner alignment --------------Re-align main burner, main burner orifice holder and gas valve
SMOKING AND SOOTINGGas pressure incorrect --------------------------Set pressure to a minimum of 11 W.C. with two or more appliances runningPoor gas supply----------------------------------Replace gas supply
Improper pilot flame ----------------------------Clean or replace pilot orificeImproper air adjustment ------------------------Adjust main burner air shutter approximately 1/4 openFlame spreader mis-aligned --------------------Re-align or replace main burnerBlocked main burner ----------------------------Remove blockageImproper main burner alignment --------------Re-align main burner, main burner orifice holder and gas valveBlocked U tube --------------------------------Remove blockage
INSUFFICIENT WATER TEMPERATURETemperature selector out of place--------------Re-set to desired positionBypass levers improperly positioned ----------Reposition leversImproper air adjustment ------------------------Adjust main burner air shutter approximately 1/4 way openPartial main burner blockage ------------------Remove blockageImproper main burner adjustment ------------Re-align main burner and main burner orifice holderFlame spreader mis-aligned --------------------Re-align or replace main burnerBlocked U tube --------------------------------Remove blockage
Pilot Water Heater
TROUBLE SHOOTIN G GUIDE
Effec tive: 5/26/98
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Engine Heat Exchange System
The engine hea t excha nge s yste m a llow s a moto r home to hea t the w a ter while traveling. This c onvenient
option allows you to arrive at your destination with hot water. Operating a pilot or electronic water heater on
ga s w hile in trans it is a da ngerous pra ctice.
This s ystem c onsists o f a U-sha ped a luminum tube tha t is a ttac hed to the o utside o f the tank with welds. S AE
hoses are attached to both ends of this tube and are spliced into the engine coolant system.
When the engine is running, the hot coolant flows past the tank through this tube and by means of heat
trans fer through the w elds, hea ting the w a ter. The des ign of this sys tem w ill not a llow the w a ter to rea ch a
bo iling p oint. It will typica lly hea t the w a ter to a bo ut 130 F. in ab out 2-3 hours of d riving.
Customer supplied SAE 053 A type"E" hose clamp
or evuivalent
Heat Exchanger Tubes
Annualar Grove
Heat ExchangerTubes
Coolant System Hose(5/8" dia. SAE 20R3or equivalent)
Customersupplied tee
Temperatures produce d by these heating elements
ca n exc eed the 190F. limit of t he EC O on pilot m od el
ga s c ontrol va lves. This g a s c ontrol valve conta ins a
one-shot ECO. When this ECO blows, the control is
completely non-functional and must be replaced.
THIS WILL BE A NON-WARRANTABLE SITUATION.
When Aftermarket hea ting e lements a re inserted
into the drain plug, customers are more prone not
to flush their tanks. Not flushing the ta nk
a cc elerates tank corrosion on b oth our pilot a nd
electronic ignition water heaters creating a situation
where the tank may have to b e replac ed. THIS WILL
BE A NON-WARRANTABLE SITUATION.
Aftermarket Heating Elements
WARNINGEXPLOSION / BURN INJURY
Aftermarket hea ting elements ca n la ck critica l sa fety controls.
Use of these devices ca n lea d to a n out of control heating of wa ter tank and a
ca tas trophic w et side explosion.
YOU DO NOT NEED AN AFTERMARKET HEATING ELEMENT ON AN ATWOOD WATER HEATER. THE USE OF AFTERMARKET HEATINGELEMENT DEVICES MAY ALSO RESULT IN DAMAGE TO COMPONENTS OR WATER HEATER. Atwoods w ritten wa rranty s tates
- failure or damage resulting from any alteration to our water heater is the owners responsibility. ANY
ALTERATION, LIKE THE ADDITION OF AN AFTERMARKET HEATING ELEMENT DEVICE, WILL VOID THE WARRANTY.
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Ground
Switch
Element
Fixed Thermostat
Manual ResetHigh TemperatureLimit Switch
( 3 )-GREEN
( 1 )-BLACK BLACK
( 2 )-WHITE BLACK
Hot Lead
Ground Lead
Common Lead
Early mo de l wa ter hea ters w ith 110 VAC hea ting
capacity used a bolt-on heating element and a one
piece thermos ta t/E.C.O..
This 110 VAC sy ste m ha s a n a djusta ble rec ta ngular
thermosta t that is surfac e mounted to the inner tank
a nd reta ined b y a ste el clip. The tempe rature settings
a re HI, MEDIUM, a nd LOW. If the thermos ta t is
ma king unobs tructed conta ct with the aluminum tank
and it is set to the HI position, it should heat the water
to 130 F. It w ill take longer to heat a tank of wa ter on
electric than gas.
The hea ting e lement w a s cha nged in 1996 from
1500W to 1400W bringing the amperage draw down
to 12.7 amps and allowing more cushion for the
15 amp circuit breaker that is normally placed in line.
This c hange ad ds a few minutes to the hea ting time.
There a re 110 VAC a fterma rket c onvers ion kits b eing
offered by distributors in w hich the hea ting e lement is
screwed into the tank where the drain plug is located.
We d o no t offer suc h a kit. Our kit includes the ta nk
with the 110 VAC components already installed in it.
In the case where the 110VAC portion of the water
heater is not heating water, the following diagnostic
steps a nd repa irs should b e investiga ted:
Turn POWER OFF to the appliance beforeremoving junction box cover.
Perform the following steps with POWER ON towater heater.
1. Verify switch-A is in ON position.
2. Insure there is 110VAC to the unit (mea sure
voltage across the black and white lead to the
a pplia nce with P OWER ON). If none, tra ce w iring
back and make appropriate wire repair.
Perform the following steps with POWER OFF towater heater.
3. ECO Re-set B utton-D should b e depress ed.
4. Check for continuity betw een sc rew-B and sc rew -
C of thermos ta t. If none, replac e thermosta t.
5. If w a ter is insufficiently hot, chec k ECO /
Thermos ta t-E is o n high.
6. Verify a g ood wire co nnection betw een thermosta t
sc rew -C a nd hea ting element sc rew-G . Co rrect if
necessary.
7. There should b e c ontinuity b etw een hea ting
element screw -G a nd sc rew -F. If none, element is
ba d a nd s hould b e repla ced . Do not over-tighten
self-tapping screws when installing new element.
8. Check for continuity between element screw-G
and flange of element. If there is, element has
shorted. Element should be replaced.
9. Verify ground c onnec tion.
NOTE: Heating element can be operated on an emptytank for a limited period of time before it self destructs.
BOLT-INHeating Element, Thermostat & ECO
110VAC Trouble-ShootingWiring Schematic
Temperature
Adjustment Dial
ECORe-Set
Button
UP
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Current produc tion w a ter hea ters w ith the 110 VAC
heating option use a screw-in heating element, asepa rate pre-set thermostat and a sepa rate ECO.
The s crew -in hea ting element is rated a t 1400 wa tts
just like the bolt-on element. It is an incalloy element
and can be run for a limited amount of time in a dry
tank without shorting out.
C AUTION: If the he a ting element is a llowe d t o run
with a dry tank, allow the tank to cool down for 2-3
hours before adding water. Adding water before
the tank cools sufficiently could collapse the tank.
The thermosta t and EC O are pre-set s urfac e-mounted
disc s. The thermostat is s et at 140 F and is the samethermosta t used on the ga s side of the electronic
ignition w a ter heate rs. The ECO is a ba ckup
thermostat and will trip if the thermostat fails and the
wa ter temperature exceeds 170 F.
When the 110VAC portion of the water heater is not
heating wa ter, the follow ing d iag nostic steps andrepairs should be investigated:
Turn POWER OFF to the appliance before removing
junction box cover.
Perform the following steps with POWER ON towater heater.
1. Verify s w itc h is in ON po s ition.
2. Insure there is 110VAC to the unit (mea sure
voltage across the black and white lead to the
appliance with POWER ON). If none, trace wiring
back and make appropriate wire repair.
Perform the following steps with POWER OFF towater heater.3. Manual reset ECO high limit switch-A should be
depressed . C heck for continuity betw een
TERMINAL B and TERMINAL C of ECO.
4. Check for continuity between TERMINAL D and
TERMINAL E of thermostat. If there is none, replace
thermostat.
5. If water is insufficiently hot, insure thermostat is
flush with tank.
6. Verify a g ood w ire c onnec tion be tw een ECO
TERMINAL-C a nd hea ting element TERMINAL-F.
Co rrect if neces sa ry.
7. Check for continuity between heating element
TERMINAL-F and TERMINAL-G. If none, element is bad
and should be replaced. Do not over-tighten self-
tapping screws when installing new element.
8. There s hould NOT BE CONTINUITY betw een element
screw-G and flange of element. If there is, element
has shorted. Element should b e repla ced .
9. Verify g round c onne ct ion.
NOTE: Heating element ca n be operated on an emptytank for a limited period of time before it self destructs.
Ground
Switch
Element
Fixed Thermostat
Manual ResetHigh TemperatureLimit Switch
( 3 )-GREEN
( 1 )-BLACK BLACK
( 2 )-WHITE BLACK
Hot Lead
Ground Lead
Common Lead
SCREW-INHeating Elem ent, Thermostat & ECO
110VAC Trouble-ShootingWiring Schematic
UP
G C DF B E
A
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ELECTRONIC IGNITION MODELS
QUESTIONS
The following questions should be answered during this portion of the manual:
What is minimum ga s press ure for proper w a ter heater operation?
Where on the ga s s olenoid valve ca n ga s pressure be tested ?
What is the minimum volta ge nee ded for opera tion?
Wha t is the prope r w iring hoo k-up for the w a ter hea ter circ uitry?
C a n the Circuit B oa rd Tes ter be use d on both Fenwa l a nd Cha nnel circuit bo a rds ?
How c an the C ircuit Boa rd Tester be used to chec k a " flying lea d" circuit boa rd?
What co nditions c a n ca use tra cks on the bac k of the circuit boa rd to blow?
What is a proper ma in burner a ir shutter a djustm ent?
Wha t is the function of the thermal cut-off?
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Atwood 6 and 10 gallon Electronic Ignition Water HeatersAtwood water heaters are designed and approved for use only in recreation vehicles (travel trailers, 5th wheels,
moto r homes , etc .). They a re offered in two s izes : 6 and 10 ga llon c a pa cities .
TYPE OF GAS IGNITION -
This unit is ignited ins ide of the trailer by a remote ON/OFF sw itch. The wa ter tempera ture is preset a t 140 F.
EXPLANATION OF MODEL NUMBER:
Electronic ModelsG C H 6 A - 9 E
Elec tronic Ignition
Version
Type of hea ting element
(G C _ A - _ _ = bolt on, G C _ A A-_ _ = s c rew in)
Gallon capacity (6 or 10)
Engine heat excha nge
Co mbination ga s a nd 110VAC electric
Propane Ga s
NOTE: When replac ing the e lement o n a co mbination ga s/110 VAC unit, a lw a ys chec k the ba ckof the hea ter for the type o f element it has . It will either be a bo lt-on or sc rew -in
element. They a re not interchang ea ble.
FEATURES All units operate on propane gas.
A pre-se t thermosta t se t for 140 F. An afterma rket retro-fit a djusta ble thermos ta t is a vaila ble and
ad justable from 110 to 150 F.
A heat excha nge o ption is a vaila ble. The w a ter heater tank must have fa ctory eq uipped hea t excha nge
tubes w elded on it a lrea dy. They ca nnot be a dd ed late r. A new w a ter heater ta nk w ith this fea ture must b e
insta lled to use the hea t excha nger.
Skin mounting allows the water heater to be hooked up with plumbing and electrical before the sidewall is
erected.
This hea ter has a co mpa rab le, if not s uperior, a node type protec tion for the ta nk. The ta nk is m a nufac tured
with a c lad aluminum lining tha t protects a ga inst c orrosion but does not need to b e replac ed yea rly a s a n
anode rod. A more detailed explanation of cladding is found in the back of this manual.
95% of a ll se rvicing is do ne on the o utside of the w a ter heate r. 110 VAC hea ting c ompo nents a re the
exception. Since they are located on the back of the water heater inside the trailer.
A flush fla nge is a vaila ble for all mod els. This m a kes the a cc es s do or flush w ith the s idew a ll.
There a re multiple prote ct ion fea tures in the form of a press ure-temp era ture relief va lve, a limit sw itc h in
the gas thermostat and an externally sealed combustion chamber.
Both the six and ten gallon units have the lightest weight in the industry.
On a ll tra ilers purcha se d a fter J une 1, 1997 the Atw ood Limited Wa rra nty is for a period of tw o ye a rs. This
includes all rea sona ble la bor cha rges .
We ha ve 700+ S ervice Centers throughout the United S tates .
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Recommended Tools and Equipment
U-Tube Manometer - This is the mo st a cc ura te d evice for meas uring g a s p ress ure. If you use a dial-typema nometer, it should be ca librated period ica lly w ith this type o f ma nometer.
Multi-meter - This is the m os t versa tile me ter and will tes t co ntinuity a nd 12VDC . Thes e tes ts w ill a llow one toverify voltag e problems or faulty co mponents. The entire e lectronic sys tem c an be teste d with this meter.
Circuit Board Tester - The tes ter is c a pa ble of testing a ny of the circuit bo a rds (Fenwa l a nd C hannel mode ls)that we have used on our water heaters. It is a simple table top device that will diagnose the following items on
a circuit boa rd: pow er circuit, s ense circuit, s pa rk ge neration a nd the lock-out mode. For use on c ircuit boa rds
with a flying lea d co nnection, splice a wire into the b la ck w ire o f the tes ter harness with a 1/4 male terminal on
the free end .
Common Hand Tools - 1/8 a nd 1/4 nut drivers, open e nd w renches , flat blad e a nd P hillips sc rew drivers.
Leak Test Solution - A solution that bubbles when applied to gas fittings or connections showing where a gasleak is present.
7654
32101234567
Manometerconnection
Correctwa terlevel
Fill here
MULTI-M ETER TO TESTCONTINUITY & VOLTAGE
U-TUBE M ANOM ETERwith 1/8 pipe nipple
CIRCUIT BOARD TESTERMPD 32779
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DSI Sequence of Operation
Gas Supply 11 W.C to solenoid valve is necessary
12VDC Battery Voltage source to water heateror filtered sideof Convertor
ON/OFF Switch It supplies 12VDC to water heater
Thermal Cut-Off A one shot heat sensing fuse thats normally closed and sends power to the thermostat.When tripped by excessive heat (190F), (i.e. blocked burner or flue tube) it cuts power to
the circuit board and shuts down ignition.
Thermostat A normally closed non-adjustable temperature switch that sends current to the circuitboard. It opens when the water temperature reaches approximately 140F.
Circuit Board The next step is the direct spark ignition system. For a period of 6-8 seconds the circuitboard will send voltage to both the gas solenoid valve and the electrodes. If ignition doesnot occur, the board goes into a lock-out condition and the non-ignition light illuminated atthe ON/OFF switch.
E.C.O.A normally closed safety temperature switch thatsends voltage to solenoid valve. The switch opens ifthe water temperature exceeds 180F.
Gas ValveThe dual solenoid valve that opens and sends gas toelectrodes when a minimum of 10.5 VDC is applied to it.
ElectrodesCreates a spark to ignite gas. If the electrodes do notsense a flame in 6-8 seconds, a signal is sent to theboard to shut the gas valve down and the system goesinto safety lock-out.
NOTE: If this situation exists, the ON/OFF switch must beturned off and back on again.
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Guides are only intended for use on Atwood products by service technicians who have successfully completed
Atwood training. This guide s hould be used in co njunction with the a ppropria te Instruction Manua l provide d w ith the
product and any a pplica ble Industry stand ards. This is not intended to be a c omplete list. P lea se direc t ques tions
co ncerning s ervice of Atwo od products to 800-825-4328 before proceeding.
CAUSE SOLUTION
WAT ER HEAT ER L OCK OUT - SPARK PRESENT BUT NO GAS
Gas pressure incorrect ------------------------------------------Set inlet pressure at a minimum 11 W.C. with two or more gasappliances running
Low voltage--------------------------------------------------------Correct power supply - 10.5 VDC minimumBlocked main burner tube --------------------------------------Clean burner tube
Blocked main burner orifice ------------------------------------Clean or replace orificeLoose wires on E.C.O.--------------------------------------------Secure wire connectionsLoose wire connections on solenoid valve --------------------Secure wire connectionsLoose valve wire on wiring harness ----------------------------Repair wire on edge connector or replace wiring circuit board harnessDefective E.C.O. --------------------------------------------------Replace E.C.O.Defective circuit board--------------------------------------------Replace circuit boardDefective solenoid valve------------------------------------------Replace coils or solenoid valveNo gas to solenoid valve ----------------------------------------Correct gas supplyDirty connector on circuit board --------------------------------Clean edge connector
WAT ER HEAT ER L OCK OUT - GAS PRESENT BUT NO SPARK
High tension lead wire loose ------------------------------------Secure wire connection on circuit boardElectrodes loosely attached to main burner ------------------Secure electrodes to main burnerImproper electrode gapping ------------------------------------Re-position spark gap to 1/8 and into path of flameDirty electrodes --------------------------------------------------Clean electrodesWires loose in electrode porcelain------------------------------Replace electrodesCracked porcelain on electrode----------------------------------Replace electrodesDefective circuit board--------------------------------------------Replace circuit board
WAT ER HEAT ER L OCK OUT - GAS AND SPARK PRESENT
Gas pressure incorrect ------------------------------------------Set inlet pressure at a minimum 11 W.C. with two or more gasappliances running
Low voltage--------------------------------------------------------Correct power supply - 10.5 VDC minimumPoor electrical ground--------------------------------------------Secure electrical groundElectrodes out of flame pattern --------------------------------Re-adjust electrodesElectrodes sparking to screw fastening burner to flue tube Adjust electrodes away from screwDirty electrodes --------------------------------------------------Clean electrodes
Partial obstruction in main burner ------------------------------Clean main burnerPartially obstructed main burner orifice------------------------Clean main burner orifice or replaceImproper air adjustment ----------------------------------------Adjust main burner air shutter approximately 1/4 openFlame spreader on main burner out of adjustment ----------Adjust flame spreader so that it is square to the end burner tube out
of alignment of the main burnerManifold not aligned with main burner ------------------------Re-align solenoid valve with main burnerPartially opening solenoid valve --------------------------------Replace solenoid valve
Defective circuit board--------------------------------------------Replace circuit board
Electronic Ignition Water He ater
TROUBLE SHOOTING GUID E
Effe c tive : 5/26/98
continued
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Electronic Ignition Water Heater (continued) Effe c tive : 5/26/98
CAUSE SOLUTION
EXCESSIVE OR INSUFFICIENT WATER TEMPERATURES
By-pass kit valves not set properly ----------------------------Place valves in proper positionThermostat not seated against tank----------------------------Reseat thermostatDefective thermostat----------------------------------------------Replace thermostat
ERRATIC BURNER FLAME OR SOOTING
Low gas pressure ------------------------------------------------Set inlet pressure at a minimum 11 W.C. with two or more gasappliances running
Poor gas supply --------------------------------------------------Replace gas supplyImproper air adjustment ----------------------------------------Adjust main burner air shutter approximately 1/4 way open. Flame
should be mainly blue and quiet.Poor main burner alignment ------------------------------------Adjust valve and main burner alignmentMisaligned burner flame spreader ------------------------------Align flame spreader so it is square with end of burner tube.Blocked burner orifice--------------------------------------------Clean orifice. DO NOT enlarge orificeObstructed main burner------------------------------------------Clean main burnerObstructed U tube----------------------------------------------Clean U tubeObstructed exhaust grille ----------------------------------------Remove obstruction
NO SPARK AND NO GAS
No voltage --------------------------------------------------------Correct power supply - minimum 10.5 VDCDirty edge connector on circuit board--------------------------Clean edge connectorDefective thermal cut-off ----------------------------------------Replace thermal cut-offDefective ON/OFF switch ----------------------------------------Replace switchDefective circuit board--------------------------------------------Replace circuit boardDefective thermostat----------------------------------------------Replace thermostat
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Guides are only intended for use on Atwood products by service technicians who have
successfully completed Atwood training. This guide s hould be use d in co njunction w ith
the a ppropriate Instruction Manual provided with the product and any app lica ble Industry
S tanda rds . This is not intended to be a c omplete list. P lea se d irect q uestions conc erning
service of Atwoo d products to 800-825-4328 before proceeding.
1. CHECK ALL OF THE WIRE CONNECTIONS.
P oor or corrod ed w ire c onnec tions ca use mo st o f the intermittent problems in wa ter heaters. You
sho uld g o through a nd pull a ll of the w ires off any s pa de co nnections. Then rec onnec t them a nd
ensure the co nnections a re tight a nd c orros ion free.
We w a nt to po int out two co nnections often o verlooked.
First, check the (green) ground wire of the circuit board. This w ire s crews do w n under
the circuit board mounting screw. If that screw for the board is loose, you may not have asecure ground.
Second, check the four wire edge connector going into the circuit board. Remove thecircuit boa rd . Ta ke a penc il eras er and clea n the ma rks o ff the c onne c tion of the c irc uit
board. Reconnect the four wire edge connector onto the circuit board and then immediately
remove it. Look at the edge connection of the board. You need to see four good scratches
in the co nnection. If you do not s ee four scratc hes, then you w ill need to repair the ed ge
connector or replace the wire harness.
2. CHECK THE INTEGRITY AND POSITION OF THE SPARK PROBE ASSEMBLY.
The ga p betw een the spa rking probe a nd the ground probe sho uld b e
1/8 inc h. The probe s s hould be c lea n a nd free of cra cks , fla king a nd
corrosion. Position the probes so that they are in the path of the gasflow. Cracks in the ceramic insulator can also be the source of an
intermittent p rob lem. To c hec k for cra c ks ins ert a fiber wa sh er or any
other type o f insula tion ma teria l in the 1/8 g a p b etw een the rod s.
Remove the ga s valve from the circuit a nd turn the unit on. If you s ee
a spa rk jumping from the ce ra mic to the g round rod or brac ket,
replace the spark probe.
3. CHECK THE ALIGNMENT OF THE MAIN BURNER TO THE ORIFICE.
P os ition the ma in burner tube (A) so that the g a s co ming o ut
of the orifice (B) is going straight down the middle of the
burner tube. If the a lignment is off, the ga s w ill bounc e d ow n
the tube w hich w ill a lter the g a s flow onc e it rea ches thespark. Manually shift the valve (C) with your hands to achieve
this alignment.
4. CHECK THE ALIGNMENT OF THE FLAME SPREADER ON THE BURNER TUBE.
At the end of the burner tube there is a dime-shaped deflector
disk. This disk sprea ds the fla me o ut for proper hea t d ist ribution.
Alig n the fla me s prea de r (A) so tha t it is pa rallel to the end of the
tube and positioned in the center of the end of the tube. If the
flame spreader is out of position, it could divert the gas away
from the spark and cause intermittent ignition.
INTERM ITTENT IGNITION
Electroni c Igni tion Water Heater
INFORMATION GUIDE
Effe c tive : 8/21/00
continued
1/8"
C B A
A
1/4 open
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Intermittent Ignition Water Hea ter (continued) Effe c tive : 8/21/00
5. CHECK THE AIR ADJ USTMENT.
The burner tube ha s a n a djusta ble air shutter on it a t the end whe re it goe s over the orifice .
P os ition the a ir shutter so tha t it is 1/4 of the w a y open. We a re looking for a b lue fla me w ith
small traces of yellow in the flame. If the flame is fairly quiet then it is adjusted correctly.
6. CHECK THE CLEANLINESS OF THE ORIFICE.
The orifice is the hex hea d b ra ss fitting tha t is sc rew ed onto the bras s ma nifold of the va lve. You
will have access to this part once the burner has been removed. Remove the brass orifice andclean with isopropyl alcohol. NEVER enlarge the size of the orifice.
7. CHECK FOR OBSTRUCTIONS IN THE MAIN BURNER TUBE.
The c lea nliness of this tub e is very important. S pide r w ebs , so ot a nd o ther debris c a n
a cc umula te, ca using problems w ith ga s flow do wn the tube. We rec ommend cleaning the burner
tube w ith a b rush a nd not c ompress ed a ir. Co mpres se d a ir ma y not fully remove the ob struction.
8. CHECK THE CLEANLINESS OF THE FLUE TUBE.
The flue tube is the 2-1/2 inc h diame ter tube tha t sta rts a t the bo ttom rig ht co rner of the w a ter
hea ter (whe re the ma in burner fla me enters) a nd c omes out the top left. This tube c a n bec ome
bloc ked b y de bris like inse ct ne s ts o r so ot. To c lea n remo ve the me ta l flue bo x in the top left
co rner of the w a ter heater. To fa cilita te c lea ning unfold a wire ha nger, w ra p a ra g a round the enda nd use this to s wa b out the tube.
9. CHECK THE VOLTAGE TO THE VALVE.
Make sure tha t the volta ge to the g a s s olenoid valve is b etw een 10.5 a nd 13.5 volts DC . Volta ge
drops c a n occ ur a t almost a ny comp onent. Turn on ano ther twe lve volt ap plia nces w hen you
chec k the volta ge s o tha t you ca n see ho w the c onverter is w orking w ith a load . The volta ge
itself can be intermittent. With linear converters the 12 VDC varies depending on the 115 VAC.
If the 115 VAC is high then the 12 VDC will be high, and if the 115 VAC is low then the 12 VDC
w ill be low. If the po we r to the w a ter heate r is co nnecte d to the unfiltered side o f the c onverter,
move it to the filtered side.
10. CHECK THE GAS PRESSURE OF THE RV.Make sure the gas pressure of the RV is checked with preferably the furnace and the range on
to s imula te a loa d. The pres sure should b e 11 inch w a ter column under loa d. B es ide s g a s
pres sure being a t the proper level there a re othe r stra nge things that ca n ha ppen inside ga s lines
that ca use intermittent prob lems . We ha ve se en oil build up in a ga s line tha t mea nt there w a s
good pressure to one appliance but not the correct pressure to another appliance. Moisture
could also build up in the gas line that would freeze and partially block the line. Intermittent
pres sure from the reg ula tor of the bo ttles is still a nother area that sho uld be investiga ted.
11. INTERMITTENT CIRCUIT BOARD.
If you have gone through all of the above checks and the intermittent problem is still occurring,
only then c heck the c ircuit bo a rd. Ensure the c ircuit boa rd is c lea n a nd reas ona bly moisture free
before you change it.
There a re tw o ma jor points tha t s hould have sto od out to you from this list.
First, the majority of intermittent ignition problems on Atwood electronic ignition water heaters
can be corrected by cleaning certain components or making simple adjustments.
S ec ond , ignition p rob lems ca n be found in other compo nents than the c ircuit boa rd. The c ircuit
bo a rd is not the end a ll s olution to ignition problems . This minds et developed a num be r of yea rs
a g o w ith the introd uction of the first c irc uit bo a rds tha t w ere not very relia ble. Weve lea rned a lot
since t hen. Tec hnolog y ha s p rog res s ed ma king to da ys circ uit bo a rds very relia ble. The c irc uit
boa rd c an o nly do wha t the other compo nents of the wa ter heater allow it to d o.
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* * POTTED CHANNEL CIRCUIT BOARDSAtwo od **potted circuit boa rds ca n be te sted using a
multi-meter. This tes t mus t be p erformed w ith the
circuit board removed, and the meter set to the ohmssc a le. This w ill chec k the co ntinuity of a ll tra cks on
the harness c onnection of the bo ard.
The following steps should be used to test each track.
A. Cross leads of meter to ensure it is registeringcontinuity.
B. TO TEST POWER TRACK:Place negative lead of the multi-meter to ground (greenwire) track of edge connection and positive lead of themulti-meter to top power (brown wire) track of edgeconnection. If no continuity, board is defective. *Atwooddoes not warranty this installation related failure.
C. TO TEST LAMP TRACK:Place negative lead of the multi-meter to ground (greenwire) track of edge connection and positive lead of themulti-meter to lamp (blue wire) track of edgeconnection. If no continuity, this indicates blown lamptrack. Circuit board will still fire unit but lamp light willnot come on. This is caused by a short in the blue wirebetween the unit and the switch. Wiring must becorrected before the board is replaced. *Atwood doesnot warranty this installation related failure.
D. TO TEST VALVE TRACK:Place negative lead of the multi-meter to ground (greenwire) track of edge connection and positive lead of the
multi-meter to valve (red wire) track of edge connection.If no continuity, this indicates a blown valve track. If the valve wire is shorting under the flue box Atwood will warranty the board.
If the E.C.O. terminals are contacting the drawn pan Atwood will warranty the board only if the innertank of the water heater was installed flush on thefloor of the coach.
If the inner tank of the water heater does not restflush against the floor of the coach *Atwood doesnot warranty this installation related failure.
* Installation related failures on circuit boards are theresponsibility of the coach manufacturer.
** Non potted circuit boards can be checked by turning theboard over and visually inspecting each track for a burnmark or break in the track itself. A burn mark or brokentrack indicates the board is blown. Depending on whichtrack is blown determines whether it is covered underAtwoods warranty as stated in section B, C and D.
THERMAL CUT-OFF DEVICECurrent Atwood direct ignition water heaters are equipped
with a thermal cut-off device. This device is located on theincoming power wire and is connected to the thermostat. Thethermal cut-off is designed to permanently break circuit andshut down the water heater before excessive heat can causedamage due to obstructions in the main burner tube or fluetube caused by spiders or mud wasps. These obstructionscan cause the main burner flame to burn outside the mainburner tube. When the flame or the heat from the flamecontacts the thermal cut-off, the circuit will open.
If there is no heat damage to the thermal cut-off, and if it isdetermined defective, Atwood will cover the replacement ofthis device under warranty. We will allow .25 hour at your
Atwood approved warranty rate. If there is heat damage thedevice performed its safety feature and no warranty labor willbe allowed. Any obstructions should be removed, alignmentchecked and gas pressure taken before a new thermal cut-offis installed.
Note: When replacing a thermal cut-off, also examine the grillin the access door while the door is in the closedposition. The wide aluminum band of the grill shouldbe at the bottom. If it is at the top, this condition maytrap exhaust heat and possibly also cause thermal cut-off to trip. To correct, remove the grill from the doorand snap back in place with the wide aluminum band at
the bottom.
THERMOSTATThe thermostat on this water heater is pre-set at 140 F. Thewater heater will cycle off when the water temperaturereaches 140 F. and will generally take 20-25 minutes toreach this temperature. It will cycle back on when the watertemperature cools down to approximately 115 F. In the latterpart of the heating cycle though, it is very common for thepressure-temperature relief valve to weep. Refer to the pagecovering weeping relief valves to remedy this situation.
If a customer is dissatisfied with the temperature of the
water, first check the water temperature with a cookingthermometer and verifying that the initial cycle is within thetime noted above. If not, an adjustable thermostat may bepurchased allowing the water temperatures to be adjustedfrom 110 - 150 F. It fits in place of the original thermostat.
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Water Heater Wiring Schematics
Gas SolenoidValves
ECOSwitch
Non-IgnitionLight
Fixed TemperatureControl Therm ostat
RemoteSwitch
12 volt DC
Spark & Sense
Thermal Cut-Off
RED
RED
BLUE
BROWN
GREEN
GREEN
BROWN BROWN
GREEN
( 6 ) ( 4 )
( 3 ) ( 2 )
GREEN
BLUE
(6)(4)(3)(2)
BATTERY
REMOTE
SWITCH
BROWN
Do t t e d l i n e s a r e w i r e d b y c u s t ome r
When servicing controls, label all wires prior to disconnection.
Wiring errors can cause personal injury or property damage.
Verify proper op eration a fter servicing.
CAUTION
Wiring Schematic G 6A-7E, G H6-7E,G C6A-7E, G CH6-7E, G C6AA-7E,
G 6A-8E, G H6-8E, G C6AA-8E,
G CH6AA-8E, G CH6A-9E
Va lve
Re d
Re d
Re d
White
Circuit
Board
Brown
Brown
Blue
Green
Re d
Sparker
Battery
123
456
Wire Connection
Wiring Schematic G 6A-3E,G6A-4E, G H6-3E, G H6-4E,
GC H6-4E, G 6A-6E, GC H6-6E,
GH6-6E Wat er Heate rs
(Front Mount ECO a nd
Thermos tat Models).
EC O TSTAT
Wiring SchematicG 6A-2E, G 6A-3E, G H6-4E,
G H6-3E Wat er Heate rs
(Rea r Mount ECO a nd
Thermos ta t Mode ls).
Va lveWhite
Green
Re d
Brown Blue
Circuit
Board Orange
Sparker
WhiteGround
Battery
WhiteNon-ignition
Light
J unction Bo x on Ba ck of Unit
Wire Connection
REM OTE
SWITCH
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GENERAL INFORMATION
QUESTIONS
The following questions should be answered during this portion of the manual:
What causes the pressure-temperature relief valve to weep when unit is in heating cycle?
How can weeping pressure-temperature relief valves be reduced or eliminated?
What are the proper draining procedures to help reduce lime deposits and extend tank life?
Will a ta nk split for a ny other reas on b es ide s freezing?
What functions do the retaining rings se rve when repla cing a n inner tank?
What a re the most c ommon w a ys to w interize a tank?
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PRESSURE-TEMPERATURE RELIEF VALVEWeeping or dripping of a pressure-temperature relief valve while the water heater is running DOES NOT mean it isdefective. This is normal expansion of water as it is heated in the closed water system of a recreation vehicle. TheAtwood water heater tank is designed with an internal air gap at the top of the tank to reduce the possibility of weepingand dripping. In time, the expanding water will absorb this air. To replace the air follow these steps:
Step 1: Turn off water heater
Step 2: Turn off incoming water supply
Step 3: Open the closest hot water faucet in the coach
Step 4: Pull handle of pressure-temperature relief valve straight out and allow water to flow until it stops.
Step 5: Allow pressure-temperature relief valve to snap shut, turn on water supply and close faucet.
WATER HEATER TANK CORROSIONPinhole leaks from galvanic corrosion may cause the water heater tank to fail.
Microscopic particles of metals (like iron and copper) suspended in water, set up a reaction inside the water heater thatis not unlike the principle on which an automotive battery operates. The aluminum tank is the anode and the metals inthe water serve as the cathode. Consequently, the aluminum gradually sacrifices itself and aluminum particles are carriedaway with the water flow.
A white scaly material (aluminum oxide) often is formed around the points where the heaviest action is taking place andheat accelerates the process. Severity of the problem varies considerably in different locales depending on the metal andmineral content of the water. White deposits inside the water heater tank are usually from water impurities that havesettled out.
Periodic flushing of the water heater tank under pressure is recommended to slow down this process. For flushing
instructions see your owners manual or contact Atwood for a copy of our recommended procedure.
ATWOOD CLAD TANKThe Atwood water heater tank is constructed of a core of high strength aluminum. The interior of the tank consists of a15% thickness of type 7072 aluminum (pure aluminum and zinc) that is fused to the core during the rolling process.This material protects the tank from the affects of heavy metals and salts found in waters throughout the country. It isanodic to these heavy metals and acts much like an anode in a steel glass lined tank except it will last much longer.There is also no need to replace an anode on a yearly basis.
Flushing the tank on a regular basis has been found to be helpful in insuring the best performance of your water haterand adding to the useful life of the tank. For flushing instructions see your owners manual or contact Atwood for a copyof our recommended procedures.
Air Expansion Pocket
Relief Valve
125/150 psi210
Hot Water Outlet
Cold Water Inlet1/2" N.P.T.Drain Plug
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FLUSHING YOUR WATER HEATER TO REMOVETHE ROTTEN EGG ODOR
1. Turn off your main wa ter supply. Drain you wa ter
hea ter tank. Reinstall drain plug. Remove thepress ure-tempe rature relief va lve. With a funnel
use 4 pa rts w hite vinega r to two pa rts w a ter. (In a
6 ga llon ta nk that w ould b e 4 ga llons vinega r to 2
ga llons wa ter).
2. C ycle the wa ter heate r, letting it run unde r norma l
operation 4-5 times. At no time do you remove the
vinega r from the ta nk Once this has b een
co mpleted , remove the d rain plug a nd d rain the
water heater.
3. After thoroughly draining the tank, to remove the
se diment, flush the w ate r heater.
If you elect to use air press ure, it may be a ppliedeither through the inlet or outlet on the rear of the
tank or applied through the pressure-temperature
relief valve. Remove the pressure-temperature
relief valve and insert your air pressure through
the p res sure-tempera ture relief va lve c oupling . In
either cas e, w ith the drain valve o pen, the a ir
pressure will force the remaining water out of the
unit.
If air pressure is unavailable, your unit can be
flushed with fres h wa ter. Fresh wa ter should b e
pumped into the ta nk either with the o nboa rd
pump or external wa ter pres sure. External
press ure ma y b e hos ed into the unit either
through the inlet or outlet found on the rear of the
ta nk or the pres sure-tempera ture relief va lve
coupling loc ate d on the front o f the unit.
Continue this flushing process for approximately
five minutes allowing ample time for the fresh
wa ter to ag itate the stag nant wa ter on the
bottom of the tank and forcing the deposits
through the d rain op ening.
4. Upon completion of the steps above, replace the
drain plug and the pressure-temperature relief
valve.
5. Refill tank with fres h wa ter that c onta ins no
sulphur.
The Atwo od wa ter heater is d esigned for use in a
Rec rea tion Vehicle. If you use your vehicle freq uently
or for long period s o f time, flushing the w ate r heater
se veral times a yea r will prolong the life of the storag e
tank.
WINTERIZING INSTRUCTIONS
1. Turn off your main water supply, that is, your pump oryour water hook up source.
2. Drain your water heater inner tank. Upon doing so, youwill note that, due to the location of the drain plug,approximately two quarts of water will remain in thebottom of the tank. This water contains most of theharmful corrosive particles. If while draining the unit, younote that it is flowing sporadically or trickling, instead offlowing steadily, we recommend one of two things. Youshould first open your relief valve to allow air into the
tank and secondly, take a small gauge wire or coathanger device and prod through the drain opening toeliminate any obstructions.
3. After thoroughly draining the tank, you should then flushit with air pressure or fresh water. If you elect to use airpressure, it may be applied either through the inlet oroutlet on the rear of the tank. It may also be appliedthrough the relief valve part. In this case, it will benecessary to first remove the relief valve support flange.In either case, with the drain valve open, the air pressurewill force the remaining water, along with the corrosiveparticles, out of the unit. However, if air pressure isunavailable, your unit can be flushed with fresh water.
Fresh water should be pumped into the tank either withthe assistance of the on-board pump or with theassistance of external water either through the inlet oroutlet found on the rear or the relief valve couplinglocated on the front of the unit. Continue this flushingprocess for approximately five minutes allowing ampletime for the fresh water to agitate the stagnant water onthe bottom of the tank and thus forcing the depositsthrough the drain opening.
4. Upon completion of the steps above, replace the drainplug and the pressure-temperature relief valve.
5. After this procedure, there will be approximately two
quarts of water left at the bottom of the inner tank.Should this water freeze it will not cause any splitting ofthe tank.
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Terminology Definition
AGA American Gas Association
Access Door hinged cover on outside of waterheater
By Pass Kit a combination of hoses and valvesthat can aid in the winterization of
the water heaterCGA Canadian Gas Association
Calibration the condition determining whetherthe thermostat is registeringtemperatures properly
Cam-Loc Fastener a door securing device
Circuit Board an electronic panel that controls thespark, solenoid valve and sensesthe main burner flame
Drawn Pan metal pan attached to the waterheater tank and fastened to coach
sidewall to isolate combustion tooutside of coach
DSI direct spark ignition a.k.a.electronic ignition
E.C.O. (energy cut off) high temperature re-set shut offdevice
Electrolysis electro chemical corrosive processthat can cause pinholes in tanks
Fenwal Tester a diagnostic circuit board analyzer
Flame Spreader a round deflective piece found atthe combustion end of main burner.
Flue Box a chamber that separates air intakeand exhaust
Flue Tube combustion and water heatingsurface area on inside of tank
Flying Lead flame sensing wire that issometimes found hard wired tocircuit board
Front of Water Hea ter access door side of water heater
Gas Solenoid Valve a 12 volt DC device that turns on oroff the flow of gas
Immersion Element an AC electrical heating coil that isimmersed directly into water
Inverted Flare type of connection using doubleflare fitting and tube nut
Inner Tank patented, designed vessel for
heating water
Jade Knob Clip a horse shoe retainer clip on mainshaft of J ade Gas thermostat thatallows for proper moving ofON/OFF knob and shaft
Terminology Definition
Main Burner a gas and air mixing tube
Main Burner Air Shutter the slotted sleeve on tube thatallows for gas and air adjustment
Main Burner Orifice a precision drilled fitting thatregulates the BTU's of
combustion
N.P.T. (Nat'l Pipe Thread) a plumbing measurement standard
Pilot Assembly A gas tube, orifice & thermocouple
Pilot Orifice a precision drilled thimble shapedcomponent that meters gas flowto pilot
Pilot Relight Ignition Module 12 volt electronic panel thatprovides spark ignition and flamesense to maintain pilot flame
Pressure-Temperature a pressure and temperature safety
Relief Valve device used on water heatingvessels.
Ring and Gasket retaining fiber & metal rings thatsecure combustion pan to tank
Sight Glass burner flame viewing port onaccess door
Spark Probe Assembly a spark electrode & flame sensing
Thermal Cut-Off heat sensing diode that cutspower to circuit board if a flamebacks out of the burner tube orflue tube normally caused by an
obstruction in these areas
Thermostat (gas) a temperature sensitive device forturning on and off the flow of gas(T-stat)
Thermostat (120 volt AC) a surface mount temperaturesensitive device that turns on/offheating element
Thermostat (12 Volt DC) a surface mount temperaturesensitive device that turns on/offthe voltage to the circuit board
Thermocouple a device, when heated, generatesmillivolts of electricity
UL Underwriters Laboratories
"U" Tube also referred to as a flue tube onsome water heater models
Winterization process of preparing a waterheater for cold winter storage
WATER HEATER TERMINOLOGY
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ATWOOD WATER HEATERLIMITED WARRANTY
Atwoo d Mobile P roducts w arrants to the o riginal owner and s ubject
to the below mentioned conditions, that this product will be free ofdefects in ma terial or workmanship for a pe riod of two years fromthe original da te of purcha se. Atwo od s liab ility hereunder is limited
to the replac ement of the product, repair of the product, orreplac ement of the product with a reconditioned product at thedisc retion of the ma nufac turer. This wa rranty is void if the prod uct
has been da maged by a ccident , unreaso nable use , neglect ,
tampering or other ca uses not a rising from d efects in ma terialwo rkma nship. This wa rran ty extends to the origina l ow ner of the
product only and is subject to the following conditions:
1. For a period o f two yea rs from the da te of purcha se, Atwood w illreplace the complete water heater if the inner tank leaks due tocorrosion. This wa rranty includes reasona ble labor cha rges
required to replace the complete water heater.2. For two years from the da te of purchase, Atwood will repair or
repla ce a ny pa rt defec tive in material or workmans hip. This
wa rranty includes reasona ble lab or charges , required to removeand replac e the pa rt. Service c alls to customers loca tion a re notcons idered pa rt of these c harges a nd a re, therefore, the
responsibility of the owner.3. This wa rran ty does no t cover the follow ing items c lass ified a s
normal maintenanc e:
a . adjustment o f g as pressureb. cleaning or replac ement of burner orifice
c . c leaning or adjustment of burner tubed. cleaning or ad justment of f luee. cleaning or a djustment of pilot a nd thermoco uplef. ad justment of press ure-temperature relief valve
4. In the event of a warranty claim, the owner must contact, inadvance, either a certified Atwood Service Center or theAtwood Service Department. Warranty claim service must be
performed at a certified Atwood Service Center (a list will beprovided at no charge) or as approved by the Consumer ServiceDepartment, Atwood Mobile Products, 4750 Hiawatha Drive,Rockford, IL 61103-1298 USA. Phone: (815-877-5700).5. Return parts (or wa ter heater) must be s hipped to Atwo od
Prepaid. Credit for shipping costs will be included with the
wa rranty c laim. The defec tive pa rts (or wa ter heater) bec ome theproperty of Atwoo d Mobile P roducts a nd must b e returned to theCons umer Service Department, Atwood Mobile P roducts, 4750
Hia wa tha Drive, Ro ckford, IL 61103-1298 USA.
6. This wa rranty ap plies on ly if the unit is ins ta lled a cc ording to theinstallation instructions provided and complies with local and statecodes.
7. The wa rran ty period o n replac ement pa rts (or wa ter heater) is theunused portion of the original warranty period.
8. Da ma ge o r failure resulting from misus e (including failure to seek
proper repair service), misapplication, alterations, water damage,or freezing are the ow ners respo nsibility.
9. Atwoo d does not as sume responsibility for any loss of use of
vehicle, loss of time, inconvenience, expense for gasoline,telephone, travel, lodg ing, loss or da mag e to p ersonal propertyor revenues. S ome s tates do not a llow the exclusion o r limitation
of incidental or conseq uential da mag es, s o the a bove limitationsor exclusions may not a pply to you.
10. Any implied wa rranties a re limited to tw o (2) years. So me s tates
do not allow limitations on how long an implied warranty lasts, sothe a bove limitation ma y not a pply to you. This w arranty g ives
you specific legal rights and you may also have other rights whichvary from sta te to s tate.
11. Replac ement parts (components or ta nks) purcha sed outside ofthe original wa ter heater wa rra nty ca rry a 90 da y wa rra nty. This
includes the part at no charge and reasonable labor charges torepla ce it.
This Atwo od hea ter is des igned for use in recreational vehicles for the
purpose of hea ting wa ter as stated in the data plate a ttached to thewa ter heater. Any other use, unless authorized in writing b y the AtwoodEngineering Depa rtment, voids this wa rranty.
Warranty ProceduresAtwood water heater, furnace, range, hardware or detectorwarranties can be submitted in one of two ways.
If you are already set up with an owner care program with anOEM, you should submit the faulty part and claim throughtheir system.
To submit a claim directly through Atwood the followinginformation is required:
1. Owners Name and Address.
2. Date of Purchase - obtain from copy of original bill of sale.
3. Model and Serial Number - The model and serial number,which is located on every water heater, furnace and rangeis required on all Atwood appliance claims.
4. Manufacturer, Model, Year and VIN # of RV.
5. Work Performed - Describe in detail findings of existingproblem and corrective measure taken.
6. Return Parts - A MUST RETURN parts list is attached.Failure to return parts listed will result in denial of your
warranty claim.7. Return Good Number - a Return Goods Number (RGN)
must accompany all returned parts. This number may beobtained by calling the Atwood Mobile Products ServiceDepartment at 1-800-825-4328. The RGN must be clearlymarked on the outside of each carton. Failure to do so willresult in your shipment being refused at our receivingdepartment.
8. Return Freight - Atwood does not accept C.O.D.shipments. Freight to return parts to Atwood should beindicated on your claim or repair order and you will bereimbursed.
9. Travel Time - Because our warranty is based on thecustomers ability to present the unit for service, and in anattempt to maintain our low cost products, reimbursementfor mileage, service calls and travel time WILL NOT BEALLOWED.
10. Payment for Warranty Service - All parts are replaced atno charge, freight prepaid upon our inspection. Labor, onnet 30 accounts is paid by credit memo within 30 days ofreceipt of parts.
11. Flat Rate Schedule - A reasonable flat rate schedule forwarranty repairs has been set for each Atwood productand/or parts. Should unusual circumstances take you
beyond the standard time allowance, you must have priorapproval by contacting the Atwood Mobile ProductsService Department at 1-800-825-4328, and press option5 after the recording.
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Return Goods PolicyEffective August 7, 1995, all Atwood defective returns will no longerbe repaired at the warehouses and returned to customers. Defectivereturns will be shipped back to the respective manufacturing facilityfor problem cause analysis within 30 days of sales. Full credit will beissued if the cause analysis determines Atwood is responsible. If thecause analysis determines the customer is responsible, partial or nocredit will be issued.
Warranty Returns - the warranty policy, must return policy andapproved labor rates provide the framework for warranty returns byproduct line.
Non-Defective Returns - A restocking fee of 20% will be chargedfor handling of overstock returns or standard stock items orderedincorrectly by the customer providing the product is received inresalable condition. Product that has been specifically designed ata customers request is non-returnable. Obsolete or out datedproduct will not be accepted for credit.
Shipping Dam age - Once the product has been accepted at its finaldestination it is the customers responsibility to file a damage claimwith the carrier.
Follow Warranty Procedures for Atwood returns.
Return PartsWhen returning parts, there are three divisions responsible forspecific product and their claims. Prior to returning parts, a ReturnGoods Number (RGN) must be obtained by calling the AtwoodMobile Product Service Department at 800-825-4328.
Shipping - Reasonable shipping charges are reimbursed ondefective and warranty parts if the analysis determines Atwood isresponsible for the disposition. All products not shipped via Atwoodtrucks should be shipped prepaid via UPS ground unless negotiatedat the time the RGN is given. No collect shipments will be accepted.
Packaging -The RGN must be identified on each container & allpacking information. Product returned must be properly packagedto prevent shipping damage. Full credit will not be issued onproduct sent back on an open skid or improperly packaged.Additional product boxes are available upon request.
Submit claims to the correct division. Failure to do so makes claimprocessing a more difficult and lengthy process delaying payment of yourclaims. Together we can maintain a speedy and efficient warranty program.
WATER HEATERS//HARDWARE (jacks, couplers, 5th wheel & braking systems)
Atwood Mobile Products4750 Hiawatha DriveRockford, IL 60013
Must Return Parts ListUnder Atwoods Warranty Administration Program we require,with the return of warranty claims, the specific parts noted below.Failure to accompany your claims with these parts will result inthe non-shipment of a replacement part, or the non-processingof the appropriate credit until such time as the part is received byAtwood.
Before returning the part, a RGN (Re turn Goods Number) must beobtained. This number can be acquired for all products exceptseating, by calling the Atwood Mobile Products ServiceDepartment at 1-800-825-4328. To obtain RGNs for seatingcomponents, please call 1-219-522-7891. Without this RGNappearing on the outside of the shipping carton, the shipmentwill be refused at our receiving department.
FURNACE
All parts
HARDWARECouplersJ acksActuatorsMaster cylindersShock absorbersFoundation brakesPower jacksPower jack motorsAll 5th Wheel items
RANGE & OVENSRegulatorsOven thermostatsSafety pilot valvesBurner valvesManifoldsTop pilot valves12v ignition moduleBurners w/ignitionelectrodeComplete ranges (BY
APPROVAL ONLY)
SEATING COMPONENTS
All parts
WATER HEATERComplete water heatersInner tanksGas thermostat valvesCircuit boardsGas solenoid valvesElectric thermostatsHeating elementsPilot assemblies
Spark probe assembliesE.C.O. & T-stat kitsThermal cut-offsPressure-TemperatureRelief
Valves
FOR EFFICIENT PROCESSING OF CLAIM1. Call for a RGN number.2. Fill Warranty Service Report form out completely.3. Using tape or a tag mark the returning part with the
RGN #.4. Package part including the Warranty Service Report in
the box.5. On the outside of the package clearly mark the RGN
number.
6. Return part to the correct Division of Atwood MobileProducts.
FURNACE/LP DETECTORS
Atwood Mobile ProductsSalt Lake City Operations1874 South Pioneer RoadSalt Lake City, UT 84104
CO DETECTOR
KIDDE Safety (1-800-880-6788)1394 South Third StreetMebane, NC 27302
RANGE/COOK TOPS/DROP- INS/SOL-A-VENTSAtwood Mobile ProductsWedgewood Operations6320 Kelly Willis RoadGreenbrier, TN 37073
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J une 17, 2003
Flat RateSchedule
Water Heaters
TIME ALLOWANCE SCHEDULE in hours
Replacement of: Standard Pilot Electronic IgnitionModel Model
Access Door........................................................................................................ .30 .......................................................................................... .30 ......................................................
Circuit Board .................................................................................................... N/A .......................................................................................... .50 ......................................................
Co mplete Wa ter Hea ter ........................................................ 1.50 ...................................................................................... 1.75 * ..................................................
Dra in Va lve or P lug ................................................................................ .30 .......................................................................................... .30 * ..................................................
Elec tric On-Off S w itch..................................................................
.50..........................................................................................
.50 *..................................................
Heating Element .................................................................................... 1.00 ...................................................................................... 1.00 * ..................................................
Inne r Ta nk ............................................................................................................ 2.00 ...................................................................................... 2.30 ......................................................
Main Burner.......................................................................................................... .50 .......................................................................................... .50 ....................................................
On-Off Light Wa ll Sw itc h ...................................................... N/A .......................................................................................... .75 ......................................................
Pilot Assembly ............................................................................................ .50 ........................................................................................ N/A ......................................................
P ilot Ignitor Mod ule ............................................................................ .50 ........................................................................................ N/A ......................................................
P ress ure-Temp. Relief Va lve ............................................ .50 .......................................................................................... .50 * ..................................................
Relay .......................................................................................................................................................................................................................................... .50 * ..................................................
S oleno id Va lve .............................................................................................. N/A .......................................................................................... .50 ......................................................
Spark &Probe Assembly ...................................................... N/A .......................................................................................... .50 ......................................................
Therma l Cut Off ........................................................................................ N/A .......................................................................................... .30 ......................................................
Thermos ta t &E.C.O. ...................................................................... N/A .......................................................................................... .50 * ..................................................
Thermo sta t-electric .............................................................................. .50 .......................................................................................... .50 ......................................................
Thermos ta t-ga s ...................................................................................... 1.00 ........................................................................................ N/A ......................................................
* ind ica tes time a llow ed for Elec tric/Marine units
Note: All fla t rates include diag nos tic time a nd w hen a pplica ble,gas leak test.
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13
8
76
15
5 3
9
11
10
16
17
18
19
10
20
10
12
11
4
6 &10 gal.