Weil-McLain CGA25SPDN Boiler User Manual


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GOLD CGa Gas-Fired Water Boiler — Boiler Manual
32
Part Number 550-101-009/0107
Start-up — verify operation6d
4HEBOILERMODELSUFlXWILLBEh30$v&ORSPARKIGNITEDPILOTBOILERSSUFlXh0)$vSEE
3ECTION or for operation and lighting/operating information.
&IGURE Typical main burner flame
&IGURE Typical pilot burner flame
5. Return thermostat to normal setting.
6. Set thermostat heat anticipator setting indicated on
wiring diagram.
Check vent system operation
 #HECKVENTSYSTEMATLEASTONCEAMONTHDURING
heating season. With boiler firing, hold candle or
MATCHBELOWLOWEREDGEOFDRAFTHOODhSKIRTv)F
flame does not blow out, but burns undisturbed,
vent system is functioning properly. If flame blows
out or flickers drastically, inspect vent system for
obstructions or other causes of improper venting
(such as exhaust fans in boiler room).
Check burner flames
Pilot burner flame (&IGURE)
PROPER pilot flame
 "LUEmAME
2. Inner cone engulfing thermocouple (standing pilot)
or pilot flame sensor (spark-ignited pilot).
3. Thermocouple or pilot flame sensor glowing cherry
red.
IMPROPER pilot flame
1. Overfired — Large flame lifting or blowing past pilot
flame sensor.
2. Underfired — Small flame. Inner cone not engulfing
pilot flame sensor.
 ,ACKOFPRIMARYAIR9ELLOWmAMETIP
4. Incorrectly heated pilot flame sensor.
Main burner flame (&IGURE)
PROPER main burner flame
 9ELLOWORANGESTREAKSMAYAPPEARCAUSEDBY
dust).
IMPROPER main burner flame:
1. Overfired — Large flames.
2. Underfired — Small flames.
 ,ACKOFPRIMARYAIR9ELLOWTIPPINGONmAMES
(sooting will occur).
Check vent damper operation
1. 2AISEROOMTHERMOSTATTOCALLFORHEAT6ENT
damper actuator will slowly open vent damper.
2.
7HENVENTDAMPERISFULLYOPEN — Main gas valve
will open and main burners will ignite. (Spark-ig-
nited pilot controls will first light pilot, then allow
main burners to ignite.)
6ENTDAMPERMUSTBEFULLYOPEN
before main burners light. If vent
damper does not fully open, flue
products such as carbon monoxide
will escape into house, causing se-
vere personal injury or death.
3.
,OWERTHERMOSTATSETTING — Main burner flames
will go out, then vent damper will close.
4.
2EPEAT3TEPSTHROUGH several times to verify
operation.
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