Form I-RA/D 140/235 (Version A), Mfg No. 110318 Rev 4, Page 47
Is there
sufficient oil in the
supply tank?
Is the
pump
turning?
Check
pump and
motor drive compo-
nents and set screws.
Are they
OK?
Is there
line voltage across
motor leads?
Is the
vacuum gauge
reading over 10”
hg.?
Is the oil flow
rate approximately 2.1 oz per
minute for Size 140 or 3.6 oz per
minute for a Size
235?
Reconnect oil supply
line and bleed oil from
burner tee bleeder.
Is the
flow
adequate?
Is the
supply line
blocked?
Is the
oil flow in the
aluminum oil pre-
heater
blocked?
Is the
burner tee strainer
blocked?
Does the
fuel valve open when
energized?
Is there oil
flowing the return
line?
Fill oil
tank.
Replace
or repair.
Replace fuel
pump motor.
Check wiring
and connections.
Check/clean oil pump
filter, foot valve, and
foot valve strainer.
Disconnect oil supply
line at the pump.
Establish constant pump
operation. See Priming
and Oil Leaks, page 19.
Remove the
fuel pump.
Start the heater.
Check for proper
operation.
Clear blockage
or replace line.
Disassemble and
clean the aluminum
oil pre-heater.
Remove and clean
the strainer.
Replace the
fuel valve.
Start the unit.
Check for proper
operation.
Replace the relief valve.
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
Chart No. 7 - Oil Delivery System
CAUTION: If the heater will be shut down for a long period, turn off the elec
-
tric power
.
