Read and save these instructionsfor future reference.

IMPORTANT

If the information in this manual is not followedexactly, a fire or explosion may result causingproperty damage, personal injury or loss of life.

WARNING

Improper installation, adjustment, and/oroperation could cause carbon monoxidepoisoning resulting in injury or loss of life.

This product must be installed and serviced by aprofessional service technician who isexperienced and qualified in hot water boilerinstallation and gas combustion.

WARNING

Do not store or use gasoline or other flammableliquids in the vicinity of this or any otherappliance.

WHAT TO DO IF YOU SMELL GASDo not try to light any appliances.Do not touch any electrical switches, do notuse any phone in your building.Immediately call your gas supplier from aneighbor’s phone. Follow the gas supplier’sinstructions.If you cannot reach your gas supplier, call thefire department.

Installation and service must be performed by aqualified installer, service agency or the gassupplier.

VITODENS 100-W

Operating Instructions &User’s Information Manual

Vitodens 100-WWB1A SeriesWall-mounted, natural gas-fired condensing boiler

For natural gas onlyHeating input NG 29 to 100 MBH

8 to 30 kW

PleasefileinServiceBinder

5581 532 v1.1 07/2007

Safety, Installation and Warranty Requirements

2

Safety, Installation and Warranty Requirements

Please ensure that these instructions are read and understood before commencing installation. Failure to comply with the instructionslisted below and details printed in this manual can cause product/property damage, severe personal injury, and/or loss of life. Ensureall requirements below are understood and fulfilled (including detailed information found in manual subsections).

H Licensed professional heatingcontractorThe installation, service, andmaintenance of this equipment mustbe performed by a licensedprofessional heating contractor.

" Please see sectionentitled “ImportantRegulatory andInstallationRequirements” in theInstallation Instructions.

H Product documentationRead all applicable documentationbefore commencing installation. Storedocumentation near boiler in a readilyaccessible location for reference in thefuture by service personnel.

" For a listing ofapplicable literature,please see sectionentitled “ImportantRegulatory andInstallation Requirements”in the Installation Instructions.

HAdvice to ownerOnce the installation work iscomplete, the heating contractor mustfamiliarize the systemoperator/ultimate owner with allequipment, as well as safetyprecautions/requirements, shut-downprocedure, and the need forprofessional service annually beforethe heating season begins.

HCarbon monoxideImproper installation, service and/ormaintenance can cause flue productsto flow into living space. Flueproducts contain poisonous carbonmonoxide gas.

" For informationpertaining to the properinstallation, service andmaintenance of thisequipment to avoidformation of carbon monoxide, pleasesee the Installation Instructions of theVitodens Venting System.

H Equipment ventingNever operate boiler without aninstalled venting system. An improperventing system can cause carbonmonoxide poisoning.

HWarrantyInformation contained inthis and related productdocumentation must beread and followed. Failureto do so renders warrantynull and void.

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Installers must follow localregulations with respect toinstallation of carbon monoxidedetectors. Follow manufacturer’smaintenance schedule of boiler.

WARNING

Index

3

Page

General Information About these Instructions 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Safety For your Safety 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Useful Tips Overview of Controls and Indicators 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Changing Room Temperature 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Start-up/Operation Start-up of the Heating System 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Heating System Operation 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

DHW Production 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Heating Water Temperature and System Pressure 11. . . . . . .

Switching OFF Vitodens with Frost Protection 12. . . . . . . . . . . . . . .

Shutting Down the Heating System 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Information Fault Diagnosis and Correction 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Fault Messages on the Display 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Service Instructions for your Heating System 14. . . . . . . . . . . . . . . .

How to Save Energy 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Lighting and Operating Instructions 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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4

About these InstructionsTake note of all symbols and notations intended to draw attention to potential hazards or important product information.These include ”WARNING”, ”CAUTION”, and ”IMPORTANT”. See below.

Warnings draw your attention to thepresence of potential hazards orimportant product information.

Cautions draw your attention to thepresence of potential hazards orimportant product information.

Helpful hints for installation, operationor maintenance which pertain to theproduct.

This symbol indicates that additional,pertinent information is to be found incolumn three.

This symbol indicates that otherinstructions must be referenced.

For your Safety

H Operation

Before operating the boiler, make sureyou fully understand its method ofoperation. Your heating contractorshould always perform the initial start-upand explain the system. Any warranty isnull and void if these instructions are notfollowed.

HWorking on the equipment

All personnel working on the equipmentor the heating system must have theproper qualifications and hold allnecessary licenses.

Ensure main power to equipment,heating system, and all external controlshave been deactivated. Close main gassupply valve. Take precautions in allinstances to avoid accidental activationof power during service work.

HMaintenance and cleaning

Regular inspection and service by aqualified heating contractor is importantto the performance of the ViessmannVitodens 100-W. Neglectedmaintenance impacts on warranty;regular inspection ensures clean,environmentally friendly and efficientoperation. We recommend amaintenance contract with a qualifiedheating contractor.

H Flue gas smell

- Deactivate heating equipment.- Open windows and doors.- Inform your heating contractorimmediately.

H Dangerous conditions

- Deactivate main power immediately.- Close gas supply valve.

H Technical information

- Technical Data Manual- Installation and Service Instructions- Operating Instructionsand User’s Information Manual

- Vitodens Venting System InstallationInstructions

- Quick Start-up Guide- Instructions of other productsutilized and installed

- Installation codes mentionedin this manual

5581

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Indicates an imminently hazardoussituation which, if not avoided, couldresult in death, serious injury orsubstantial product/property damage.

WARNING

Indicates an imminently hazardoussituation which, if not avoided, mayresult in minor injury orproduct/property damage.

CAUTION

IMPORTANT

Safety

5

For your Safety (continued)

H Carbon monoxide

The U.S. Consumer Product SafetyCommission strongly recommends theinstallation of carbon monoxidedetectors in buildings in whichgas-burning equipment is installed.Carbon monoxide (CO) is a colorless,odorless gas, which may be producedduring incomplete combustion of fueland/or when the flame does not receivean adequate supply of combustion air.

Carbon monoxide can cause severepersonal injury or loss of life.

Therefore, carbon monoxide detectorsthat are in compliance with a nationallyrecognized standard (e.g. ANSI/UL2034-2002, CSA 6.19-01) should beinstalled and maintained in buildings thatcontain gas-burning equipment.

Note:Viessmann does not test any detectorsand makes no representation regardingany brand or type of detector.

H For safe operation

We recommend that you frequently:- Check for debris which could obstructthe flow of flue gases. The vent orchimney must not be blocked. Ablocked or partially blocked vent orchimney can cause flue gases to leakinto the structure. Flue gases leakinginto the house can cause injury ordeath. A qualified heating contractormust remove the blockage fromblocked or partially blocked chimneys.

- Check pressure gage for correctsystem (water) pressure. Check forwater on the floor from the dischargepipe of the pressure relief valve or anyother pipe, pipe joint, valve or airvent.

- Check for moisture, water, orappearance of rust on the flue gaspipes, their joints as well as ventdampers, or side wall vent terminals(if so equipped).

- Ensure that nothing is obstructing theflow of combustion and ventilation airand no chemicals, garbage, gasoline,combustible materials, flammablevapors and liquids are stored (noteven temporarily) in the vicinity of theboiler.

- Do not allow unsupervised childrennear the boiler.

Service/inspection of the boiler and thesystem is recommended once per year.Maintenance, service and cleaning arespecified in the Installation and ServiceInstructions.

Before the heating season begins, it isrecommended that the boiler and burnerbe serviced by a qualified heatingcontractor. Service contracts may beestablished through gas suppliers orother licensed contractors in your area.

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As there are no user-serviceable partson the boiler, burner or control, theend-user must not perform serviceactivities or adjustments of any kind onsystem components. Failure to heedthis warning can cause propertydamage, severe personal injury, or lossof life.

WARNING

Improper installation, adjustment,service, or maintenance can cause flueproducts to flow into living space. Flueproducts contain poisonous carbonmonoxide gas which can cause nauseaor asphyxiation resulting in severepersonal injury or loss of life.

WARNING

Should overheating occur or the gassupply fail to shut off, do notdisconnect the electrical supply to thepump. Instead, shut off the gas supplyat a location external to the appliance.

CAUTION

The operator/ultimate owner is requiredto have the heating boiler, burners, andcontrols checked, as a minimum onceper year, by the original installer or by acompetent heating contractor familiarwith the equipment. Defects must becorrected immediately.

WARNING

Do not use this boiler if any part hasbeen under water. Immediately call aqualified heating contractor to inspectthe boiler and to replace any part of thecontrol system and any gas controlwhich has been under water.

CAUTION

Safety

6

For your Safety (continued)

Frozen water pipe hazard

Your heating boiler is designed to providea warm and comfortable livingenvironment. It is NOT designed to ensureagainst freezing of water pipes.The boiler is equipped with several safetydevices that are designed to shut downthe boiler and to prevent it from restartingin the event of various unsafe conditions.

If your boiler remains off for an extendedperiod of time during cold weather, waterpipes may freeze and burst, resulting inextensive water damage and conditions inwhich mold could grow. Certain molds areknown to cause respiratory problems, aswell as to pose other serious health risks.In case of water damage, immediatemeasures should be taken to dry outaffected areas as quickly as possible toprevent mold from developing.

If your home will be unattended for anextended period of time during coldweather, you should...

H Shut off the water supply to thebuilding, drain the water pipes and addan antifreeze for potable water to draintraps and toilet tanks. Open faucetswhere appropriate.

Or..

H Have someone check the buildingfrequently during cold weather and call aqualified service agency if required.

Or...

H Install a reliable remote temperaturesensor that will notify somebody offreezing conditions within the home.

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Failure to protect against frozen pipescould result in burst water pipes,serious property damage and/orpersonal injury. Boiler may shut down.Do not leave your home unattended forlong periods of time during freezingweather conditions without turning offthe water supply and draining waterpipes or otherwise protecting againstthe risk of frozen pipes.

WARNING

Safety

7

For your Safety (continued)

Installation area conditions

H Ensure ambient temperatures are higherthan 32°F / 0°C and lower than104°F / 40°C.

H Prevent the air from becomingcontaminated by halogenatedhydrocarbons (e.g. as contained inpaints solvents or cleaning fluids) andexcessive dust (e.g. through grinding orpolishing work).Combustion air for the heating process,and ventilation of the boiler room mustbe free of corrosive contaminants. Tothat end, any boiler must be installed inan area that has no chemical exposure.The list to the right indicates the main,currently known sources.

H Avoid continuously high levels ofhumidity (e.g. through frequent drying oflaundry).

H Never close existing ventilationopenings.

Replacement components, spare and wearparts

Components which are not tested withthe heating system may damage theheating system, or affect its functions.Installation or replacement may only becarried out by a qualified heatingcontractor.

Sources of combustion and ventilation aircontaminants

Areas likely to contain contaminants:

H New building constructionH Swimming poolsH Remodelling areas, hobby roomsH Garages with workshopsH Furniture refinishing areasH Dry cleaning/laundry areas andestablishments

H Auto body shopsH Refrigeration repair shopsHMetal fabrication plantsH Plastic manufacturing plantsH Photo processing plantsH Beauty salons

Products containing contaminants:

H Chlorine-type bleaches, detergents andcleaning solvents found in householdlaundry rooms

H Paint and varnish removersH Hydrochloric acid, muriatic acidH Chlorine-based swimming pool chemicalsH Spray cans containingchlorofluorocarbons

H Chlorinated waxes and cleanersH Cements and gluesH Refrigerant leaksH Calcium chloride used for thawingH Sodium chloride used for watersoftening salt

H Permanent wave solutionsH Adhesives used to fasten buildingproducts and other similar items

H Antistatic fabric softeners used inclothes dryers

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If you notice fire coming from theappliance, call the fire departmentimmediately! Do not attempt toextinguish the fire unless qualified to doso.

WARNING

Fire causes a risk of burns andexplosion!H Shut down the boilerH Close fuel shut-off valvesH Use a tested fire extinguisher, class

ABC.

WARNING

Incorrect ambient conditions can lead todamage to the heating system and putsafe operation at risk.

WARNING

IMPORTANT

Useful Tips

8

Overview of Controls and Indicators

Legend

tr boiler water temperatureselector dialDisplay, fault and reset buttonLCD display

Opening the control unit

Controls and indicators are located behindthe hinged front cover.

Control and display elements

The control unit is preset at the factoryfor standard operation. Your heatingsystem is ready for use. The factorypresets may be individually adjusted tosuit your specific requirements.

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tr9

Useful Tips

9

Overview of Controls and Indicators (continued)

Legend

Display value or fault codeHeating mode (pump on)Burner in operationActual burner firing rateBoiler water temperature in °F(combined with display value)FaultSystem pressure (combined withdisplay value)Emissions test activated (only forlicensed professional heatingcontractor)

Changing Room Temperature

In case a separate external roomtemperature controller (thermostat) isinstalled, the desired room temperaturewill be adjusted using this device.

Make adjustments using the appropriateoperating instructions only.

Please also note:

lf thermostatic radiator valves are installedin the room where the control is installedthey must be fully open.

In case the room temperature setting onthe separate room temperature controlleris not sufficient to achieve the desiredroom temperature (e.g. during aparticularly cold winter), the boiler watertemperature can be adjusted accordinglyusing the boiler water temperatureselector dial tr.

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F

Start-up/Operation

10

Start-up of the Heating System

Before you switch ON a heating system which has been switched OFF for longerperiods of time, it is advisable to contact your local heating contractor.

1. Switch ON the main power supply.Your heating system and, if installed,your room temperature thermostat arenow ready to operate.

2. Check the pressure of the heatingsystem by turning the selector dial“tr” to “9“. The system pressurewill be displayed.Or check the pressure gage locatedat the bottom left corner of the boilersupply piping.Minimum system pressure is 14 psig.Please contact your heating contractorif the system pressure is too low.

3. Open gas shutoff valve .

Heating System Operation

tr9

Switching ON:Turn the selector dial “tr” to the desiredboiler water temperature.The display “r” indicates when roomtemperature has been reached.

Switching OFF:Turn the selector dial “tr” to “9“.

Please note:If an external device is connected thatcontrols the boiler water temperature, itcan no longer be adjusted using theselector dial “tr”.

Domestic Hot Water Production

When in operation with separate a Domestic Hot Water (DHW) tank, domestic hotwater temperature is adjusted at the temperature control of the DHW tank.

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tr9

Operation

11

Heating Water Temperature and System Pressure

Checking the boiler heating watertemperature

During operation, heating watertemperature is constantly displayed.

Checking the system pressure

1. Turn the selector dial “tr” fullycounter clockwise towards “9“.The display now shows the currentsystem pressure (e.g. 20 psig).

2. Return the selection dial back to itsoriginal position.

Note:The display will flash if the systempressure falls below 8 psig. In thisinstance, please contact your heatingcontractor.

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12

Switching OFF Vitodens with Frost Protection

Switch OFF the equipment if you do not wish to use your heating system for a fewdays.

Turn selector dial “tr” to “9“.Boiler frost protection is active.

Frost protectionFrost protection is continuously active.The burner is switched ON when theboiler water temperature reaches 41°F /5°C and is switched OFF again when theboiler water temperature reaches at least59 °F / 15°C (but not more than 68°F /20°C).

Shutting Down the Heating System

Shut down your heating system completely, if it is not needed for longer periods oftime (several months).Before you switch your heating system OFF for longer periods, it is advisable to contactyour local heating contractor. Your heating professional will take any necessarymeasures, e.g. for freeze protection of the system or to protect the heat emittersurfaces, e.g. radiators etc.

1. Close gas shutoff valve and secureagainst unintentional opening.

2. Switch OFF line voltage (e.g. atseparate fuse/circuit breaker).The power supply to the system is nowswitched off.

At this point the boiler and the system isno longer protected from freezing.

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IMPORTANT

Information

13

Fault Diagnosis and Correction

Issue Cause Corrective Action

Heating system does not start up Heating system switch turned to OFF oncontrol unit

Turn switch to ON on control unit.

Selector dial “tr” is set to “9“. Set required heating water temperature(see page 10).

Circuit breaker or fuse in powersupply or in boiler control unit has blownor tripped

Inform heating contractor.

Burner does not switch on or onlyintermittently

No gas Open gas shut-off valve or contact yourgas supply company.y

Fault on control unit Make a note of the fault code and in-form heating contractor.

Burner does not start up; red burner faultlamp ”U” is lit on control unit

Faulty start-up Press burner fault reset button (seepage 8). Should this attempt fail,contact your heating contractor.

Low water level System operating pressure is flashing onthe display. Inform heating contractor.

Burner does not start up; burner fault lamp”U” appears in display

Power supply too low Contact your Hydro company.

The burner switches off even thoughthe desired room temperature has not

Fault in combustion air supply or in theventing system

Contact your heating contractor.p

been reached Heating water temperature or room tem-perature is set too low

Increase heating water temperature byturning selector dial “tr” or byincreasing desired room temperature onthe room thermostat.

Rooms are cold although burner isoperating

Domestic hot water supply haspriority (operation with DHW storagetank only)

Wait until the domestic hot water heat-ing is complete.

Fault on programmable roomthermostat

Contact your heating contractor.

Fault Messages on the Display

Any faults in your heating system areindicated on the display by a flashing faultsymbol “U“.Read off the fault code in the display andreport it to your heating contractor. Thishelps the contractor to properly prepare,and may result in lower service costs.

WarningVisually inspect the vent termination for any signs of blockage. Under cold climate conditions (sustained temperatures below 0°F /-18°C) the vent termination may be severely blocked by icicle and frost build-up. The boiler control will automatically shut down theboiler should air intake or vent be blocked. Remove blockage if possible. Reset the boiler and the boiler should attempt to restart. Ifblockage is not obvious and cannot be removed, contact a licensed professional heating contractor.

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Operation

14

Service Instructions for Your Heating System

Viessmann strongly recommends inspection/service of the boiler and the system by alicensed professional heating contractor once per year.

Before the heating season begins, the boiler with its burner(s) and vent system should beserviced by a qualified heating contractor. Service contracts may be established throughgas suppliers or other licensed contractors in your area.

Regular inspection/service ensures troublefree, energy-efficient and environmentallyfriendly heating activity of your heating system.

BoilerAll boilers must be cleaned on a regularbasis as debris build-up will result inincreased flue gas temperature, and thusin increased energy consumption.

Notes on operation:H Ensure boiler room and boilerare clean.

H Regularly check heating systempressure on the pressure gage:If the system operating pressuregage is indicating a pressure ofbelow 14 psig, the system pressureis too low; in this case, pleasecontact your heating contractor.

Viessmann domestic hot water storagetankInspection and (if necessary) cleaning ofthe tank must take place within 2 years ofinitial start-up and every 2 yearsthereafter.Cleaning of the inside surfaces of thedomestic hot water storage tank, includingdomestic hot water connections, may onlybe performed by an licensed professionalheating contractor.

Vitocell 100:Viessmann recommends an annualinspection, and replacement if required, ofthe consumable anode by a licensedprofessional heating contractor.The inspection can be carried out duringregular operation of the heating system;shut-down is not required.The heating contractor measures theprotective current with an anode testinginstrument.

If a water treatment device (watersoftener) is installed in the domestic coldwater supply to the hot water storagetank, ensure its proper working conditionis checked regularly by your heatingcontractor.The same applies if a dirt trap or a waterfilter is installed in the domestic coldwater supply. Any of these devicesinstalled in the domestic cold water supplymust be flushed out and serviced on aregular basis.

Drinking water filter (if installed)For hygienic reasonsH replace filter element every6 months on filters which cannot beflushed back, and perform a visualinspection every 2 months,

H flush back reversible flow filtersevery 2 months.

Please follow manufacturer’sinstructions.

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IMPORTANT

Information

2

1 3

4

5

6

15

How to Save Energy

.... by heating the right wayApart from taking advantage of the benefits of a modern heating system, there is a lotyou can do yourself to achieve additional fuel savings. For instance:

H Don’t overheat:Aim at a room temperature of68 ºF/20 ºC. Every 2 ºF/1 ºC less inroom temperature will reduce yourheating bills by up to 6 %.

H Close window shutters (if installed) atdusk.

H Operate thermostatic valves 2 correctly.H Don’t obstruct radiators 3 andthermostatic valves 2.

HMake use of individual adjustment optionsof the control unit4 (supplied byothers);e.g. ”normal room temperature”alternating with ”reduced roomtemperature”.

H Set the domestic hot water temperatureof the DHW tank 5 on the control unitof the tank or on external controller.

H Control your consumption of hot water:A shower generally consumes lessenergy than a bath.

... with regular maintenanceRegular maintenance check-ups of your heating system by a licensed professionalheating contractor will ensure energy savings and environmentally friendly operation.

.... with effective insulationIf you wish to make use of additional energy-saving measures, check the thermalinsulation:

H of heating and domestic hot waterpipes.

H of external walls and the roof.H between heated and unheated rooms.H of the windows.

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16

Lighting and Operating Instructions

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FOR YOUR SAFETY READ BEFORE OPERATINGW A R N I N G: If you do not follow these instructions exactly, a fire orexplosion may result causing property damage, personal injury or loss of life.

A. This appliance does not have a pilot. It is equippedwith an ignition device which automatically lightsthe burner. Do not try to light the burner by hand.

B. BEFORE OPERATING smell all around the appliancearea for gas. Be sure to smell next to the floorbecause some gas is heavier than air and will settleon the floor.WHAT TO DO IF YOU SMELL GAS• Do not try to light any appliance.• Do not touch any electric switch; do not use anyphone in your building.

• Immediately call your gas supplier from aneighbor’s phone. Follow the gas supplier’sinstructions.

• If you cannot reach your gas supplier, call the firedepartment.

C. Use only your hand to push in or turn the gascontrol knob. Never use tools. If the knob will notpush in or turn by hand, don’t try to repair it, call aqualified service technician. Force or attemptedrepair may result in a fire or explosion.

D. Do not use this appliance if any part has been underwater. Immediately call a qualified servicetechnician to inspect the appliance and to replaceany part of the control system and any gas controlwhich has been under water.

1. STOP! Read the safety information above on thislabel.

2. Set thermostat or other operating control to lowestsetting.

3. Turn off all electric power to the appliance.

4. This device is equipped with an ignition devicewhich automatically lights the burner. Do not try tolight the burner by hand.

5. Close main gas shut-off valve.

6. Wait five (5) minutes to clear out any gas. Thensmell for gas, including near the floor. If you smellgas, STOP! Follow ”B” in the safety informationabove on this label. If you don’t smell gas, go to thenext step.

7. Open main gas shut-off valve.

8. Turn on all electric power to the appliance.

9. Set thermostat or other operating control todesired setting.

10. If the appliance will not operate, follow theinstructions ”To Turn Off Gas To Appliance” andcall your service technician or gas supplier.

TO TURN OFF GAS TO BOILER

1. Set thermostat or other operating control to lowestsetting.

2. Turn off all electric power to the appliance if serviceis to be performed.

3. Close main gas shut-off valve.

OPERATING INSTRUCTIONS

Closed

Open

Manual gas shutoff

17

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Viessmann Manufacturing Company Inc.750 McMurray RoadWaterloo, Ontario • N2V 2G5 • CanadaTel. (519) 885-6300 • Fax (519) 885-0887www.viessmann.ca • mail@viessmann.ca

Viessmann Manufacturing Company (U.S.) Inc.45 Access RoadWarwick, Rhode Island • 02886 • USATel. (401) 732-0667 • Fax (401) 732-0590www.viessmann-us.com • mail@viessmann-us.com

20

Quick Reference

°C °F

-40 -40-35 -31-25 -13-20 -4-18 0-16 +3-14 +7-12 +10-10 +14-9 +16-8 +18-7 +19-6 +21-5 +23-4 +25-3 +27-2 +28-1 +300 +32

+1 +34+2 +36+3 +37+4 +39+5 +41+6 +43+7 +45+8 +46+9 +48

+10 +50+12 +54+14 +57+16 +61+18 +64+20 +68+25 +77+30 +86+35 +95+40 +104+50 +122+60 +140+70 +158+80 +176+90 +194+100 +212+110 +230

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