Weil-McLain 7 PFG Control Supplement Download

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PFG S

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7 G

Fired

ater

oiler

– U

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ontrol

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Part Number 550-110-643/0605

Section A: Installation

1. Bring supply wiring to boiler. Must be 14 ga. or heavier. See pages listed below each Figure for appropriate wiring diagram.

2. Proceed to page 6.

PFG 5 Boiler

Figure 1,

see page 4

PFG 6 thru 8 Boilers

Figure 2,

see page 5

Summary of Contents for 7 PFG

Page 1: ...help see Troubleshooting 11 15 Parts List 16 Controls must only be installed by and Control Supplement used by a qualified installer service technician Read all instructions before installing Failure to follow all instructions in proper order can cause severe personal injury death or substantial property damage Control Supplement Universal Control Systems UCS PFG Gas fired water boiler Series 7 ...

Page 2: ...cause severe personal injury death or substantial property damage if ignored indicates presence of hazard which will or can cause minor personal injury or property damage if ignored indicates special instructions on installation operation or maintenance which are important but not related to personal injury hazards This system is used on natural gas fired boilers with or without dampers as shipped...

Page 3: ...rt Number 550 110 643 0605 Section A Installation 1 Bring supply wiring to boiler Must be 14 ga or heavier See pages listed below each Figure for appropriate wiring diagram 2 Proceed to page 6 PFG 5 Boiler Figure 1 see page 4 PFG 6 thru 8 Boilers Figure 2 see page 5 ...

Page 4: ... PFG Series 7 Gas fired Water Boiler Universal Control Systems Part Number 550 110 643 0605 PFG 5 ...

Page 5: ... PFG Series 7 Gas fired Water Boiler Universal Control Systems Part Number 550 110 643 0605 PFG 6 thru 8 ...

Page 6: ...tly on top of draft hood so that it serves only one boiler and so that damper blade indicator is visible to homeowner See Figure 1 or 2 and Figure 3 or 4 Where screws or rivets are used to secure damper to draft hood they must not interfere with free movement of damper blade 5 Install damper harness between damper actuator and knock out in jacket top panel Use strain relief connectors and locknuts...

Page 7: ...niti ates a five minute wait period If call for heat exists after five minutes ignition sequence starts at Step 2 b If pilot lights and ignition control senses flame current main valve opens and spark generator is turned off 4 During main burner operation a Ignition control monitors pilot flame current If signal is lost main valve is closed spark generator activated and sequence returns to Step 3 ...

Page 8: ... PFG Series 7 Gas fired Water Boiler Universal Control Systems Part Number 550 110 643 0605 PFG 5 WITH HONEYWELL VR8204 VR8304 GAS VALVE ...

Page 9: ... PFG Series 7 Gas fired Water Boiler Universal Control Systems Part Number 550 110 643 0605 PFG 5 WITH WHITE RODGERS 36C GAS VALVE ...

Page 10: ...10 PFG Series 7 Gas fired Water Boiler Universal Control Systems Part Number 550 110 643 0605 PFG 6 8 WITH ROBERTSHAW 7000 DERHC GAS VALVE ...

Page 11: ...mper blade should then rotate to open position and boiler will fire 2 If Step 1 above does not open damper manually rotate damper blade to open position using wrench or pliers on flat shaft between damper and actuator Boiler will fire Verify that damper service switch is in HOLD DAMPER OPEN position 3 Do not leave damper permanently in this position Replace actuator immediately If damper is left i...

Page 12: ...als 24V 24V GND No Yes VISUALLY CHECK is ground wire connected from GND Burner to ignition control mounting screw and ground wire connected from transformer Terminal C to case ground No Yes Correct by making connections Turn OFF supply voltage Check spark wire Is it securely connected to spark transformer No Yes Securely connect then turn ON supply voltage and re test Is condition of spark wire go...

Page 13: ...er rotated open No Yes Open thermostat contacts for 30 seconds Damper will rotate to closed position Close thermostat contacts Damper will rotate to open position Is 24VAC present across terminals PV and MV PV No Yes Is 24VAC present at Terminals PV and MV PV No Yes Is spark present now Yes No Re test Turn OFF supply voltage Check continuity of each wire in wiring harness to damper Does continuity...

Page 14: ...ssembly Is sense wire or sensing probe shorted out to metal surface No Yes Correct Replace ignition control Replace ignition control Is 24VAC between Terminals MV and MV PV on ignition control No Yes Contact gas supplier to correct Is inlet gas pressure at least 5 0 W C and not over 14 W C No Yes Is main valve wiring secure at terminals No Yes No Yes Does system have proper flame signal Set up mic...

Page 15: ...and pilot line is not kinked or obstructed Check for clean pilot orifice If OK replace gas valve Replace pilot assembly Block any draft around boiler Check for clean pilot orifice Is spark gap 0 125 and located in pilot gas stream No Yes TO CHECK IGNITION SYSTEM GROUNDING FOR TABLE III PAGE 14 Nuisance shutdowns are often caused by poor or erratic ground Check for good metal to metal contact betwe...

Page 16: ...kal RVGP KS 9BF Johnson Q35GM 2 consisting of M35BC actuator and Y15 vent pipe 381 800 477 381 800 478 381 800 445 Damper Actuator Effikal RVGP Effikal Only Johnson M35BE 1C Johnson Only 510 512 337 510 312 255 Damper Harness Weil McLain 591 391 795 UCS Ignition Control Honeywell S8620C1003 United Technologies 1003 511 511 330 097 Pilot Burner Assembly Johnson Controls Q90GE 1 consisting of J981LY...

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