Pump Pressure Adjustment - Dura Heat DFA50 Manuel D'instructions

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NEVER LEAVE THE HEATER
UNATTENDED WHILE BURNING!
H.) FUEL FILTER
CLEAN OR REPLACE TWICE A HEATING
SEASON OR AS NEEDED.
- Remove side cover screws using medium
phillips screwdriver.
- Disconnect switch wires from power switch
and remove side cover.
-
-
pull to remove (DFA50/80T Models only).
-
remove (DFA135C/180CV/220CV Models only).
-
-
- Replace switch wires to power switch.
- Reinstall side cover.
I.) PUMP PRESSURE ADJUSTMENT
NOTE: If the pump pressure needs to be adjusted,
make sure the heater is running on the
HIGH BTU setting.
- Push the BTU CONTROL Switch to HIGH.
(See Operation, page 8, DFA180CV/220CV
Models only)
- Remove Pressure Gauge Plug from End Filter
Cover. Install accessory Pressure Gauge.
(DFA50/80T/135C Models only)
- Start heater (See Operation, page 8)
Allow motor to reach full speed
-
Turn relief valve to clockwise to increase
pressure. Turn relief valve to counter clockwise
to decrease pressure.
- Stop heater (See Operation, page 8)
MODEL
High BTU level
DFA50
DFA80T
DFA135C
DFA180CV
DFA220CV
NOTE: USE ONLY ORIGINAL EQUIPMENT
REPLACEMENT PARTS.
Use of alternate or third party components will
void any warranty and may cause unsafe
operating condition.
Pump Pressure
Low BTU level
3.8 psi N/A
3.8 psi N/A
5.5 psi N/A
6.5 psi 4.5 psi
8.5 psi 6.5 psi
Screw
Side Cover
Power Switch
Figure 19. Fuel Filter Replacement
Flat blade
Screw driver
End Filter Cover
Pressure Gauge Plug
Pressure Gauge
DFA50/80T/135C
Pressure Gauge
BTU Control Switch
DFA180CV/220CV
Figure 20. Adjusting Pump Pressure
13
Fuel Filter
Fuel line
Switch Wires
Relief Valve
Models Only
Relief Valve
Models Only