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CONDITION 5c - VIBRATION NOISE (IN-HOUSE) BUT, REMOTE FROM BOILER (STEADY-STATE)
POSSIBLE CAUSE
VERIFICATION
SOLUTION
Air Intake & Exhaust Lines
Visually check that the lines are
If pipes are rigidly supported or in
supported with vibration isolator
direct contact with the building
supports & the lines are isolated
structure, change the supports to
from the building structure -
vibration isolators or re-route the
especially where exiting the building
piping as required. See Installation
or passing thru walls.
Manual (AM2).
CONDITION 5d - “OBJECTIONABLE” EXHAUST NOISE (MUFFLERS INSTALLED)
CONDITION
VERIFICATION
SOLUTION
Exhaust Noise
Add a one foot extension to the
If there is a perceptable noise
When Boiler Runs
exhaust termination (remove after
reduction permanently attach the
check). Exhaust piping CPVC
one foot extension you have added.
(SCH-40) length should not exceed
installation limitations.
The sound you are hearing may be
the normal operating sound of the
NOTE: Thru-the -wall exhaust
boiler. Check with Customer Service
terminals require a 12" extension
for additional options in noise
to begin with.
reduction
- Dull-“Thud” or “Pop” on
Check for high gas supply pressure
If inlet gas supply pressure exceeds
Start-up.
per “Procedures” section in this
7" W.C. install a “lock-up” style
manual (typical 4.5 - 7.0" W.C.). If
supply pressure regulator as close to
re-adjusted a lowside gas pressure is
boiler as possible. Set this regulator
- Sharp-“Crack” on Start-up.
preferred.
at 4.5 to 5" W.C. delivery pressure
when running. Recheck gas input
(AM-300)
NOTE: If boiler is more than
rate per procedure.
5 yrs old - consider tune-up kit
installation.
If problem persists call Customer
Service for a “Hard Start” kit.
