Weil-McLain CGi Series 3 Installation And Maintenance Manual page 35

CG i
GAS-FIRED wATER BOILER- sERIEs 3 -
Boiler Manual
7b
Start-up - operate boiler
(continued)
Start the boiler
Follow the Operating instructions from Section 9c to start
the boiler.
See Section 7c if boiler fails to start.
Check system and boiler
t.
Check system piping for leaks. If found, shut down boiler
and repair immediately.
2. Vent air from system
usin~
manual vents. Air in the system
will interfere with circulatiOn and cause heat distribution
problems and noise.
3. Inspect vent system thoroughly for signs of deterioration
from corrosion, physical damage or sagging. In addition -
Check for gas-tight seal at every connection and seam.
Venting system must be sealed gas-tight to prevent flue gas
spillage and carbon monoxide emissions which
will result in severe personal injury or death.
4. Check around the boiler for gas odor following the procedure
of Section 7a of this manual.
5. Verify operation per Section 7b. Perform check-out pro-
cedure in Section 8, and fill in the Installation and servtce
certificate on the same page.
Check burner flames
View pilot and main flames through the inspection port in the
base burner shield.
Pilot burner flame
(Figure 28)
PROPER pilot flame characteristics
t. Blue tlante.
2. Inner cone engulfing pilot flame sensor.
3. Pilot flame sensor glowing cherry red.
IMPROPER pilot flame charactf!f"istics
I.
Overtired - Large flame lifting or blowing past pilot
tlante sensor.
2. Undertired - Small flame. hmer cone not engttlfing
pilot flame sensor.
3. Lack of primary air - Yellow flame tip.
4. Incorrectly heated pilot flame sensor.
Main burner flame
(Figure 29)
PROPER main burner flame characteristics
I. Yellow-orange streaks may appear (caused by dust).
IMPROPER main burner flame characteristics
I. Overtired - Large flames.
2. Undertired - Small tlan1es.
3. Lack of prinlary air - Yellow tipping on flames
(sooting will occur).
Figure 28 Typical pilot burner flame
Figure 29 Typical main burner flame
Tronsporont
btueflome
Inner ftome
7c
Start-up - if boiler doesn't start
• • •
Check for:
I. Loose connections, blown fuse or ser-
vice switch off?
2. High linlit switch set below boiler water
temperature?
4. Gas not turned on at meter or boiler?
5. Incoming gas pressure less than:
5" w.c. for natural gas? t 1" w.c. for propane gas?
71030
3. Thermostat set below room tempera-
ture?
6. If none of the above corrects the problem, refer to Troubleshoot-
Ing, section 11 of this manual.
Part Number 550-142-780/0712
35