BENSON AH150 - Page 35

Fig 30
Burner giving
excessive
noise
Check Burner
-
Fan
Motor
I--
L--
Suction Lift Too
Great
r--
Check Burner 011 e----'---
Pump
Foreign Matter in
Fan
Worn/ Dry
Bearing
Insecure Burner
Fan
Water in Fuel
Line
Fuel Feed
Restriction
Adjust Warm Air
F ig 30 Check for High
Discharge
and
Warm Air Short
Circuit
Level of System
I--
-
Cool Air Inlet
Resistance
Accordingl y
Fan
and limit
regularly go
to
lockout
f-
Insufficient Air
-
Flow
over the
Heat Exchanger
Limit Control
"----
Incorrectly Set
,--
~
,----
Check Fan and
Motor Assembly
-
L--
-
Reset to 100" C
I---
Check
Outlet
Grilles are not
Closed or Severely
Restricted
Check Filter
System is Clear
Check Pulleys
f------
are Secure
Check for no
I----
Loose Contacts
ICheck for Belt
Slip
i-
Fan and/or
Motor not up to
f------
Correct Speed
Check Fan and
I----
Motor are Secure
Check that Fan is
not Blocked or
I---
Restricted
Check that
Impeller is
not
Slipping
I---
34