Protectofier COMBUSTION SAFEGUARD FORM 6642FF GROUP M2101

Bulletin 42- FF / X-383

Full Feature Combustion Safeguard including:

• Proof of Closure

• Proof of High Fire Purge

• Purge Timing (In 15 sec. increments to 7¾ min max.)

• Proof of Low Fire Start

• Ignition Trial Timing (Pilot) 10 sec.

• Pilot Interrupt Timing (Main burner ignition trial) 10 or 15

sec.

• Alarm output if the safety interlocks (limit switches) or

flame failure causes shutdown.

• Relay contacts available to drive actuator to high fire for purge, low fire for ignition trial, and control when main

burner is proven.

• Eight status lights

Specifications: 120VAC 50-60Hz 1 Phase

0º to 60ºC

125VA Pilot Duty

Dimensions:

8 ½” H X 6 ½” W

Form 6642FF in Nema 4/12 Enclosure; Power Off/Reset-On

Switch Dimensions:

12” H X 10” W X 6” D

OPERATING SEQUENCE

�ORMAL START SEQUE�CE

1. Turn Power switch to “On” position. Electrical network is powered from terminal L1.

2. Operating control powers terminal 12.

3. When Proof Of Closure switch(s) and Proof of High Fire Purge Switch (if applicable) are made, terminal 6 is

powered.

4. When safety limits (high & low gas pressure, combustion air pressure, high temperature, etc.) are made,

terminal 7 is powered. Purge Timer PT is powered. PT purging yellow light is on. Interruption of safety

limits results in shutdown.

5. When PT is timed out, its green light illuminates and terminal 8 is powered. N.O. PT contact holds power to

PT from Terminal 12. The temperature control actuator drives closed.

6. When Proof of Low Fire Start Switch PLFS is made, terminal 9 is powered. Ignition Trial Timer ITT (10

seconds) and Pilot Interrupt Timer PIT start timing. PLFS is necessary if the actuator is driven to high fire for

purge.

7. The ignition transformer is powered from terminal 4 thru N.C. ITT contact.

8. Pilot valve(s) is powered from terminal 3 thru N.C. ITT contact and N.C. PIT contact. If no pilot valve(s) is

used, the main fuel valve(s) is powered from terminal 11.

9. When flame is established and is sensed, the SS100A Flame Pak “Amplifier” powers Flame Relay F. N. O. F

contact powers terminal 11.

10. When the ITT is timed out, its green light will illuminate. Main valve(s) is powered from terminal 5 thru N.O.

F and N.O. ITT contacts. The neon “Flame On” light will illuminate. The ignition transformer will be de-

energized. N.O. ITT contact will hold between terminals 8 and 9.

11. 15 (or 10) seconds after the main valve(s) is powered, PIT times out and its green light will illuminate. The

pilot valve(s) will de-energize so that the sensor is detecting main burner only. The actuator now goes to the

control mode and responds to the temperature controller (modulates).

12. The operating control may turn off the burner. When the operating control powers terminal 12 again, the

above sequence is repeated.

FAULT SEQUE�CE

1. If a flame signal is sensed during purge time, PT is de-energized. The alarm relay AR is powered thru N.C.

PT contact and N.O. F contact. AR will hold in from terminal L1 thru its own N.O. contact.

2. If a flame is not sensed during the ignition trial time, AR will be powered from terminal 12 thru N.O. ITT and

N.C.F contacts.

3. If, after the flame has been proven but at some time later flame signal is lost, AR will be powered from

terminal 12 thru N.O. ITT and N.C. F contacts.

4. All Fault sequences listed above lock out the control and may be reset by turning the power switch to

“Off/Reset.”

ITIGNITION TRANS.

SPARK IGNITOR

PV

N.C.

PILOT VALVE(S)

(NEON LIGHT)

FLAME ON

+

-

+

-

TEMPERATURECONTROL

ACTUATOR

MV

N.C.

MAIN VALVE(S)

L1OC

OPERATINGCONTROL

POC PHFP

12

7

AH

ALARM HORN

"POWER""OFF/ ON"

OX

RESET

L2

AR

AR

ITT F

ITT PIT

PT

ITT

10

11 12

PT

10 12

ITT

13 12

PIT

3

5

11

PIT

ITT

ITT

F

4

ITT

9PLFS

8

PT

13 12

PROOF OFCLOSURE

PROOF OFHIGH FIREPURGESW.

120V. - 50/60 HZ. FUSED POWER SUPPLY

16

PT

15

PT

1413

PIT

AR ALARM RELAY

PT PURGE TIMER

ITT IGNITION TRIAL TIMER

PIT PILOT INTERRUPT TIMER

PIT

LOW FIRE

HIGH FIRE

CONTROL

F

PROOF OF LOWFIRE START SW.

6SLS

SAFETY LIMITINTLKS.

(AS REQ'D.)

PT

ACF

13 12F

CONNECTP-C II UV SCANNEROR FLAME ROD

FLAME RELAY (F)COIL IS ENERGIZEDWHEN FLAME ISESTABLISHED ANDDETECTED.

FLAME PAKELECT.NETWK.

D.C.ua TEST JACK

SW.

AR

1 4

2 55 2

8 2 2 8

7 1

2 8

2 5

1 7

1 4

3 9

7 1

4 1

7 1

7 1

3 6

9 3

6 3

3 9

3 6

AR

9 3

INTERNAL WIRING

EXTERNAL WIRING

SS3CP TRANSFORMER

SS100A FLAME PAK

WIRING DIAGRAM

G

E

UV

HIGH FIRE 13 TO 15

LOW FIRE 13 TO 16

CONTROL (MODULATE) 13 TO 14

POWER ON, OPERATING

CONTROL ON

LIMITSCOMPLETE

POC

PHFP

SAFE STARTCHECK

PLFS

IGNITION

PILOT

MAIN

ALARM

ACTUATOR

DRIVE TO HIGH FIRE DRIVE TO LOW FIRE IGNITION TRIAL ( 10 SEC, )

MAIN IGNITION TRIAL ( 10 SEC. OR 15SEC.)

RUN ALARM

FULL CLOSEDFULL CLOSED

CONTROL MODE

MODULATEFULL OPEN

PURGING (15 SEC. TO 7 3/4 MIN.)

12 TO 66 TO 7

12 TO 6

8 TO 9

4

3

13 TO 16

5

10

13 TO 15 13 TO 14

L1

FLAME PAK

TRANS.

PIT ACF

(FLAME)

D.C.TESTJACK

G

UV

E

L2

3

4

5

6

7

8

9

10

11

12

13

ua

14

15

16

ITT

PT

AR

PROTECTION CONTROLS, INC.SKOKIE ILLINOIS

WIRING DIAGRAM FOR:

JOB NO. DRAWING NO.

PROTECTOFIER FORM 6642FF GROUP M2101

X-3831 -15 - 10

"POWER""OFF/ ON"

OX

RESET

OC

OPERATINGCONTROL

SLS

SAFETY LIMIT SW.

PLFS

PROOF OF LOW

FIRE START SW.

POC PHFP

PROOF OFCLOSURE

PROOF OFHIGH FIREPURGE SW.SW.

L1

L2

INTERCONNECTION DIAGRAM

OPERATINGSIGNALFROMP-C II ORFLAMEROD

GASPILOT

BURNER

FLAME ELECTRODEASSY.(IF USED)

P-C II ULTRA-VIOLET SCANNER

YELLOW

FLAMEWIRE

PURPLE

ALARM HORN

IGN.TRANS.

SPARK IGNITOR

IGN.CABLE

PILOT VALVE(S)

MAIN VALVE(S) MV

PV

N.C.

N.C.

IT

AH

(IF USED)

E

UV

G

120V.50/60HZ.FUSEDPOWER SUPPLY

(ALARM RELAY)

(PURGE TIMER)

(IGNITION

TRIAL TIMER)

(PILOT INTERRUPT

TIMER)

TO TEMPERATURECONTROLLER & ACTUATOR

DATE:

Terms used on drawing:

Operating Control (OC): is an off-on switch which may be a manual selector switch, a temperature

control switch, a time of day switch, or a process control sequence switch.

Proof of Closure (POC): is a switch or switches located on the main fuel valve(s) which is closed when

the valve(s) is closed. See NFPA 86 for valve standards.

Proof of High Fire Purge Switch (PHFP): is an end switch on the temperature control motor or

actuator which is closed when the actuator is in the full open position.

Safety Limit Switches (SLS): include, but not limited to, high gas pressure, low gas pressure,

combustion air pressure, auxiliary contact on combustion blower motor starter, and high temperature.

Proof of Low Fire Start Switch (PLFS): is an end switch on the temperature control motor or actuator

which is closed when the actuator is in the position that allows the optimal, most reliable light-off of the

burner. Do not jumper PLFS (8 to 9) if actuator is driven to high fire for purge.

Note: 1. Contact ratings on above should be suitable to carry loads of ignition transformer and pilot

valve(s) or pilot valve(s) and main valve(s).

2. Purge time shall allow 4 cu. ft. of fresh air per cu. ft. of system volume.

Indicator

Lights

Inputs

Output

7317 N. LAWNDALE AVENUE

P.O. BOX 287 • SKOKIE, ILLINOIS 60076-0287

(847) 674-7676 • CHICAGO PHONE: (773) 763-3110 FAX: (847) 674-7009

e-mail@protectioncontrolsinc.com

www.protectioncontrolsinc.com Printed in USA 0110