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Part Number 550-142-303/1120
27
EG
/
PEG sEriEs 6
•
EGH sEriEs 5 Gas-firEd boilErs — boilEr manual
4. Repeat Steps 2 through 4 several times to verify opera-
tion.
5. Return thermostat to normal setting.
6. Set thermostat heat anticipator setting indicated on
wiring diagram.
Check venting system operation
With boiler firing, hold a candle or match below lower edge
of draft diverter “skirt.” If flame does not blow out, but
burns undisturbed, the vent system is working properly. If
flame blows out or flickers severely, the vent system must
be checked for obstructions or other causes of improper
venting.
If boiler doesn’t start . . . Check for:
1. Loose connections, blown fuse or service switch off?
2. High limit switch set below boiler pressure?
3. Thermostat set below room temperature?
4. Gas not turned on at meter or boiler?
5. Incoming gas pressure less than:
5” w.c. for natural gas? 11” w.c. for propane gas?
6. If none of the above corrects the problem, see “Troubleshooting”
in the Control Supplement.
Verify operation
Check burner flame — Pilot burner
1. Proper pilot flame (see Figure 29):
a. Blue flame.
b. Inner cone engulfing thermocouple.
c. Thermocouple glowing cherry red.
2. Proper pilot flame:
a. Overfired — Large flame lifting or blowing past thermocouple.
b. Underfired — Small flame. Inner cone not engulfing thermocouple.
c. Lack of primary air — Yellow flame tip.
d. Incorrectly heated thermocouple.
Check burner flame — Main burner
1. Proper main burner flame (see Figure 30):
a. Yellow-orange streaks may appear (caused by dust).
2. Improper main burner flame:
a. Overfired — Large flames.
b. Underfired — Small flames.
c. Lack of primary air — Yellow tipping on flames (sooting will occur).
Check vent damper operation
1. Raise room thermostat to call for heat — Vent damper actuator
will slowly open vent damper.
2.
When vent damper is fully open — Pilot will light, then allow
main burners to ignite.
Vent 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 severe
personal injury or death.
3. Lower thermostat setting — Main burner flames will go out, then
vent damper will close.
Start-up (continued)
Figure 29 Typical pilot burner flame
Figure 30 Typical main burner flame
Hot Water Can Scald!
• ConsumerProductSafetyCommissionandsomestatesrecommenddomestichotwater
temperature of 130°F or less.
• Wheninstallinganautomatic mixing valve, selection and installation must comply with
valve manufacturer’s recommendations and instructions.
• Waterheatedtoatemperaturesuitableforclotheswashing,dishwashingandother
sanitizing needs will scaled and cause injury.
• Children,elderly,inrmorphysicallyhandicappedpersonsaremorelikelytobeinjured
by hot water. Never leave them unattended in or near a bathtub, shower or sink. Never
allow small children to use a hot water faucet or draw their own bath. If anyone using hot
water in the building fits this description, or if state laws or local codes require certain
water temperatures at hot water faucets, take special precautions:
• Installautomatic mixing valve set according to those standards.
• Uselowestpracticaltemperaturesetting.
• Checkwatertemperatureimmediatelyafterrstheatingcycleandafteranyadjustment.
ProtectionMustBeTakenAgainstExcessiveTemperatureandPressure! —
Installation of a Temperature & Pressure (T&P) relief valve is required.
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