Weil-McLain GOLD CGt Manual page 55

GOLD CGt Gas-Fired Water Boiler — Boiler Manual
11d
Troubleshooting — common problems
Common Problems
Metal flakes found in
flueway.
Some radiators or
baseboard units do not
heat or are noisy.
Domestic water from
tankless heater is hot
then suddenly turns cold.
OR
Domestic water from
tankless heater is always
lukewarm.
Part Number 550-110-290/0501
Common Causes
Contaminated combustion air
supply.
Condensation of combustion
gases.
Air in system.
Low system pressure.
High limit set too low.
Mineral deposits insulate
internal waterways of heater.
Boiler stop-leak compound
has been added to boiler
water and is insulating
outside of coil.
Incorrect mixing valve setting
for tankless heater.
Domestic flow rate too high.
Incorrect setting on tankless
heater low limit.
3-Way valve does not work.
Possible Corrections
Remove sources of
hydrocarbons in or near boiler
area. (Bleaches, cleaners,
chemicals, sprays, fabric
softeners, paint remover, etc.)
Have qualified service technician
check boiler operation.
Bleed air from system through air
vents in radiators or baseboard
units.
Have qualified service technician
check for leaks in boiler or piping
at once.
Have qualified service technician
adjust limit to higher setting.
Have qualified service technician
delime or replace coil.
Have qualified service technican
remove and clean coil AND drain
and flush boiler to remove stop-
leak.
Have qualified service technician
adjust mixing valve setting.
Have qualified service technician
install flow check valve set to
rating of tankless heater.
Have qualified service technician
raise tankless low limit setting.
Have qualified service technician
inspect the 3-way valve wiring,
actuator and body. Check
operation of valve. If actuator
does not move when the boiler is
shut off and there is a call for
domestic water replace valve
and actuator.
(cont.)
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