15
Part Number 550-110-737/1108
GWS-090E
Gas-Fired Water Boiler –
Boiler Manual
7 Start-up
continued
Check burner flame — Pilot burner
Proper pilot flame (see Figure 10):
1. Blue flame.
2. Inner cone engulfing pilot flame sensor.
3. 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.
3. Lack of primary air — Yellow flame tip.
4. Incorrectly heated pilot flame sensor.
Check burner flames — Main burner
Proper main burner flame (see Figure 11):
1. Yellow-orange streaks may appear (caused by dust). (The
GWS-090E will operate at low fire for the first 60 seconds.)
Improper main burner flame:
1. Overfired — Large flames.
2. Underfired — Small flames.
3. Lack of primary air — Yellow tipping on flames (sooting will
occur).
Figure 11
Typical main burner flame
Verify operation
Figure 10
Typical pilot burner flame
Operate boiler
DO NOT proceed with boiler operation unless boiler
and system have been filled with water and all in-
structions and procedures of previous manual sec-
tions have been completed. Failure to do so could
result in severe personal injury, death or substantial
property damage. Before starting the boiler . . .
• Read manual Sections 8 and 9 and “Operating
instructions”, page 19.
• Verify the boiler and system are full of water.
• Verify the Start-up preparation procedures of this
section have been completed.
Start the boiler
Follow “Operating instructions”, page 19. If boiler fails to start, see
“If boiler doesn’t start . . . Check for:” on this page.
Check system and boiler
Eliminate all system leaks. Continual fresh makeup
water will reduce boiler life. Minerals can build up
in sections, reducing heat transfer, overheating cast
iron, and causing section failure.
If you discover evidence of any gas leak, shut down
the boiler at once. Find the leak source with bubble
test and repair immediately. Do not start boiler again
until corrected. Failure to comply could result in se-
vere personal injury, death or substantial property
damage.
Do not use petroleum-based cleaning or sealing
compounds in boiler system. Severe damage to
boiler will occur, resulting in substantial property
damage.
1. Check system piping for leaks. If found, shut down boiler
and repair immediately.
2. Vent air from system
using manual vents. Air in the system
will interfere with circulation and cause heat distribution prob-
lems and noise.
3. Inspect vent system thoroughly for signs of deterioration from
corrosion, physical damage or sagging. Verify that masonry
chimney liners are in good condition, with no obstructions,
and there are no openings into the chimney.
Venting system must be sealed gas-tight to prevent
flue gas spillage and carbon monoxide emissions.
Failure to comply could result in severe personal
injury or death.
4. Check around the boiler for gas odor following the proce-
dure of Section 7, page 14 of this manual.
5. Verify operation using procedures below. Perform checkout
procedure in Section 8, page 16, and fill in the “Installation
and service certificate”.
If boiler doesn’t start . . . Check for:
1. Loose connections, blown fuse or service switch off?
2. High limit switch set below boiler water temperature?
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 “Troubleshoot
-
ing,” page 25 of this manual.
