Troubleshooting; Common Issues And Solutions; Use The Troubleshooting Table To Resolve Typical Heating System And Boiler Issues - Weil-McLain CGa Series User Manual

operation

Troubleshooting

1

Common Issues and Solutions

Symptom
2
Rapid cycling —
boiler turns on and
off frequently
3
Frequent release of
water through relief
valve
4
Need to frequently
add makeup water
Black water
condition
5
Popping or
percolating noise
heard in boiler
6
Metal flakes found in
vent outlet or vent —
flueway corrosion
7
Some radiators or
baseboard units do
not heat or are noisy
8
12
cg
Common Causes
Thermostat installed where drafts or
heat affect reading
Heat anticipator in thermostat
adjusted incorrectly
Incorrect limit setting
Insufficient water flow through boiler
Expansion tank sized too small
Flooded expansion tank
Inoperative limit control
Leaks in boiler or piping
Oxygen corrosion due to leaks in
boiler and piping
Mineral deposits in sections due
to constant use of makeup water
Incorrect pH of boiler water
Insufficient water flow through boiler
Contaminated combustion air
supply — See page 5 in this
manual
Condensation of combustion gases in
boiler sections
Air in system
Low system pressure
High limit set too low
, cg , eg, peg, & lgb user manual
a i
Possible Corrections
Locate thermostat on inner wall away from heat sources or
cool drafts
Adjust thermostat per manufacturer's instructions
Set limit according to system needs Maximum setting is 220°F
Increase limit setting to decrease cycling
Check all valves to and from boiler Return to proper setting
Confirm circulator size.
Call qualified service technician to check expansion tank
operation and size
Call qualified service technician to check expansion tank
operation
Call qualified service technician to replace limit control.
Have qualified service technician repair leaks at once to avoid
constant use of makeup water Makeup water can cause
mineral deposits which, in turn, can cause boiler section failure
Do not use petroleum-base stop-leak compounds
Have qualified service technician repair at once. Keep pH of
water between 7 0 to 8 5
Call qualified service technician to de-lime boiler, if necessary.
In some cases, deposits will be too heavy to remove with de-
liming procedures
Have qualified service technician repair leaks to eliminate need
for constant makeup water
Call qualified service technician to check pH level and correct.
pH should be maintained between 7 0 to 8 5
Check all valves to and from boiler Return to proper setting
Confirm circulator size.
Remove any contaminating products See page 5 in this
manual
Provide outside air for combustion
Have qualified service technician inspect system piping and
controls to verify proper regulation of return water temperature
Bleed air from system through air vents in radiators or
baseboard units
Fill to correct pressure
Check for leaks in boiler or piping. Have qualified service
technician repair at once
Adjust high limit to higher setting
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