SERIES 8800 & 8900 INSTALLATION AND OPERATING INSTRUCTIONS
Page 29
Trouble-Shooting
Boiler Pounds or Knocks
Low or no water flow
Ensure that pump is operating
properly - look for voltage through
flow switch.
Ensure that all system valves are
open.
Ensure that all air has been bled
from the system.
Ensure that maximum temperature
rise of
35
°
F
,
19
°
C has not been
exceeded.
Low or no system pressure
Ensure that water makeup valve is
open and functioning.
Heat exchanger blocked
Remove return header and inspect
the heat exchanger tubes.
Relief Valve Leaks
System pressure too high
Ensure relief valve is properly sized
for the system - never exceed
160 psi.
Expansion tank is waterlogged
Ensure expansion tank is properly
sized for the system.
Expansion tank is isolated
Ensure valve between expansion
tank and system is open.
Sooting of Heat Exchanger
Return water temperature to low
Adjust balancing valves for a
minimum return water temperature
of
110
°
F
,
43
°
C.
Inadequate combustion air
Ensure that the make up air supply
is adequate per NFPA 54/ANSI
Z223.
Ensure that the vent system is sized
properly, is not blocked or restricted
and that there is adequate draft
present in the breeching.
Rated input has been exceeded
Ensure that the input rate is correct.
Incorrect fuel type
Ensure that the fuel type supplied
matches the rating plate.
PROBLEM
POSSIBLE CAUSES
CORRECTIVE ACTION
