Weil-McLain GV90+ Installation And Start-Up Manual page 82

GV90+ Series 2
oAs·FIRED WATER BOILER -
Boiler Manual
Troubleshooting
(cootinuedJ
Figure 96 Common causes
and
possible corrections, part 2
Symptom
Common Causes Possible Corrections
Popping or percolating
Mineral deposits in sections due
Call qualified service technician to de-
noise heard in boiler to constant use of makeup water lirne 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.
Incorrect pH of boiler water
Call qualified service technician to check
pH level and correct. pH should be
maintained between 7.0 lo 8.5.
Insufficient water flow through
Ch.eck all valves lo and from boiler. Return
boiler to proper seHing.
Confirm circulator size.
Metal flakes found in vent Contaminated combustion air R&move any contaminating products, see
outlet or recuperator - supply - See manual page 30. manual
page
30.
flueway corrosion
Provide outside air for combustion. Have
qualified service technician pipe-up kit
Condensation of combustion
Have qualified service technician check
gases in boiler sections operation of mixing system. Repair/replace
if necessary.
Some radiators. or
Air in system Bleed air from system through air veniS in
baseboard units do not
radiators or baseboard units.
heat or are nois y
Low system pressure Fill to correct pressure.
Ch.eck for leaks in boiler or piping. Have
qualified service technician repair at once.
High limit set too low Adjust high limit to higher seHing.
82
Pan
number
550-142-783/1012