Troubleshooting; Before Troubleshooting - Weil-McLain GOLD CGt Manual

GOLD CGt Gas-Fired Water Boiler — Boiler Manual
11a
Troubleshooting — procedure

Before troubleshooting:

1. Have the following items:
. Check for 10 VAC (minimum 10 VAC to maximum 13 VAC) to boiler.
3. Make sure thermostat is calling for heat and contacts (including appropriate zone
Check the following:
1. Wire connectors to control module are securely plugged in at module and originating
. Air pressure switch hoses are properly and securely plugged in and are not dam-
3. Gas pressures:
Part Number 550-110-290/0107
Label all wires prior to disconnection when servicing controls. Wiring
errors can cause improper and dangerous operation.
Never jumper (bypass) rollout thermal fuse element or any other
device except for momentary testing as outlined in
Charts
. Severe personal injury, death or substantial property damage
can result.
a. Voltmeter that can check 10 VAC and 4 VAC.
b. Microammeter with a minimum scale range of 0-5.
c. Continuity checker.
d. U-tube manometer.
controls) are closed. Check for 4 VAC between thermostat wire nuts and ground.
control.
aged.
a. With boiler off — 13" w.c. maximum natural or propane gas pressure up-
stream of gas valve.
b. With boiler on:
• 5" w.c. minimum natural gas pressure or 11" w.c. propane gas pressure
upstream of gas valve.
• 3 ½" w.c. minimum natural gas pressure or 10" w.c. propane gas pressure
downstream of gas valve — Can be adjusted by regulator on gas valve.

Troubleshooting

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