Weil-McLain GOLD CGI 2 SERIES Manual page 35

GOLD CGi Gas-Fired Water Boiler — Boiler Manual
7b
Start-up — operate boiler
Check burner flames
View pilot and main flames through the inspection port
in the base burner shield.
Pilot burner flame (
PROPER pilot flame characteristics
1. Blue flame.
. Inner cone engulfing pilot flame sensor.
3. Pilot flame sensor glowing cherry red.
IMPROPER pilot flame characteristics
1. Overfired — Large flame lifting or blowing
past pilot flame sensor.
. Underfired — Small flame. Inner cone not
engulfing pilot flame sensor.
3. Lack of primary air — Yellow flame tip.
4. Incorrectly heated pilot flame sensor.
Main burner flame (
PROPER main burner flame characteristics
1. Yellow-orange streaks may appear (caused by
dust).
IMPROPER main burner flame characteristics
1. Overfired — Large flames.
. Underfired — Small flames.
3. Lack of primary air — Yellow tipping on
flames (sooting will occur).
7c
Start-up — if boiler doesn't start . . .
Check for:
1. Loose connections, blown fuse or
service switch off?
. High limit switch set below boiler
water temperature?
3. Thermostat set below room tempera-
ture?
Part Number 550-110-710/0107
Figure 28 )
Figure 29 )
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, refer to
ing ,
section
(continued)
Figure 28 Typical pilot burner flame
Figure 29 Typical main burner flame
11
of this manual.
Troubleshoot-
35