Weil-McLain CGa 3 Series Manual page 57

CGa Series 3 Gas-Fired Water Boiler — Boiler Manual
11b
Troubleshooting — spark-pilot boilers
CHART 7 ––
Electrical shock hazard — Wherever you see ▲ TURN OFF POWER ▲ , follow the instructions. Failure to follow
instructions could result in severe personal injury, death or substantial property damage.
Is boiler pressurized?
Yes
• Pressurize boiler to system design pressure.
• System was low on water.
• Check system fill piping for
Part Number 550-142-300/0520
Troubleshooting LWCO and POWER light Solid
and/or "LCO" shown on display
No
Are lights still solid?
No
leaks or damage.
• LWCO sensor is bad or fouled.
• Clean LWCO sensor
• Retest.
• Sensor was fouled.
• Check water quality and
maintenance schedule.
• Check system for leaks.
Yes
Are lights still solid?
No Yes
• Sensor is bad. Replace sensor.
• Retest.
(continued)
Is system leaking or not
maintaining pressure?
No Yes
• System is losing water.
• Repair leak and retest.
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