Troubleshooting - Weil-McLain GOLD CGt Manual

GOLD CGt Gas-Fired Water Boiler — Boiler Manual
11a
Troubleshooting — procedure
Before troubleshooting:
1. Have the following items:
a. Voltmeter that can check 120 VAC and 24 VAC.
b. Microammeter with a minimum scale range of
c. Continuity checker.
d. Inclined manometer with 0 – 2.5" w.c. range.
Part Number 550-110-290/0501
Label all wires
disconnection when servicing
controls. Wiring errors can cause
improper and
operation.
Never jumper (bypass) rollout
thermal fuse element or any other
device except for momentary
testing as
Troubleshooting Charts.
personal injury, death or substantial
property damage can result.
0-25.
prior to
2. Check for 120 VAC (minimum 102 VAC to
maximum 132 VAC) to boiler.
3. Make sure thermostat is calling for heat and contacts
dangerous
(including appropriate zone controls) are closed.
Check for 24 VAC between thermostat wire nuts
and ground.
Check the following:
outlined in
1. Wire connectors to control module are securely
Severe
plugged in at module and originating control.
2. Air pressure switch hoses are properly and securely
plugged in and are not damaged.
3. Gas pressures:
a. With boiler off — 13" w.c. maximum natural
gas pressure upstream of gas valve.
b. With boiler on:
•
•
5" w.c. minimum natural gas pressure
upstream of gas valve.
3 ½" w.c. minimum natural gas pressure
downstream tapping on gas valve — Can
be adjusted by regulator on gas valve.
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