Weil-McLain GV90+ User Manual download pdf (Page 14)

Part number 550-142-055/0411

GV90+ gas-fired water boiler — User’s Information Manual

Common problems and solutions (continued)

Symptom Common Causes Possible Corrections

Popping or percolating

noise heard in boiler

Mineral deposits in sections due

to constant use of makeup water

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.

Incorrect pH of boiler water Call qualiﬁed service technician to check

pH level and correct. pH should be

maintained between 7.0 to 8.5.

Insufﬁcient water ﬂow through

boiler

Check all valves to and from boiler. Return

to proper setting.

Conﬁrm circulator size.

Metal ﬂakes found in vent

outlet or vent starter tee —

ﬂueway corrosion

Contaminated combustion air

supply — See page 4 in this

manual.

Remove any contaminating products. See

page 4 in this manual.

Provide outside air for combustion. Have

qualiﬁed service technician pipe-up kit.

Condensation of combustion

gases in boiler sections

Have qualiﬁed service technician check

operation of mixing system. Repair/replace

if necessary.

Some radiators or

baseboard units do not

heat or are noisy

Air in system Bleed air from system through air vents in

radiators or baseboard units.

Low system pressure Fill to correct pressure.

Check for leaks in boiler or piping. Have

qualiﬁed service technician repair at once.

High limit set too low Adjust high limit to higher setting.

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Weil-McLain GV90+ User Manual Page 14

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