Pump Pressure Adjustment; Fuel Filter; Fuel Valve - Desa 200,000 Btu/Hr Owner's Manual

SERVICE
PROCEDURES
Continued
PUMP PRESSURE
ADJUSTMENT
1. Remove pressure gauge plug from filter
end cover.
2. Install accessory pressure gauge (part
number HA1180).
3. Start heater (see Operation, page 5).
Allow motor to reach full speed.
4. Adjust pressure to 6.0 PSI. Turn relief
valve to right to increase pressure. Turn
relief valve to left to decrease pressure.
5. Stop heater. Remove pressure gauge.
Replace pressure gauge plug in filter
end cover.
Relief Valve
Figure 8 - Pressure Gauge Plug Removal
Figure 9 - Adjusting Pump Pressure
104473

FUEL FILTER

1. Remove side cover screws using 5/16"
nut-driver.
2. Remove side cover.
3. Pull lower fuel line off the fuel valve
fitting.
4. Carefully pry bushing, lower fuel line,
and fuel filter out of fuel tank.
5. Wash fuel filter with clean fuel and re-
place in tank.
6. Attach lower fuel line to fuel valve fitting.
7. Replace side cover.
Bushing, Lower Fuel
Line, and Fuel Filter
Pressure
Gauge
Plug
Side Cover
Figure 10 - Fuel Filter Removal
Pressure
Gauge
OWNER'S MANUAL

FUEL VALVE

1. Remove side cover (see Figure 10), fan
2.
3.
4.
5. Using 1/4" nut driver remove 2 screws/
6.
7.
8.
9.
Fuel Valve
Fitting
10. Replace fan, fan guard, upper shell, and
Fuel Valve
Electrical Wires
Lower Fuel Line
Figure 11 - Fuel Valve Replacement
9
guard, and upper shell (see Figure 5,
page 8) screws using 5/16" nut-driver.
Remove fan (see Fan, page 8).
Pull lower fuel line off the fuel valve
fitting (see Figure 11).
WARNING: High Voltage
Disconnect red and white wires from
fuel valve (see Figure 11).
lockwashers holding fuel valve and
bracket to lower shell (see Figure 11).
Save these screws/lockwashers.
Using 1/4" nut driver remove 2 screws
holding fuel valve to bracket. Save
these screws
Attach new fuel valve to bracket with
2 existing screws.
Install new fuel valve and bracket on
lower shell with 2 screws/lockwashers.
Connect red and white wires (polarity
not important). Connect upper and
lower fuel lines to fuel valve. See Fig-
ure 11.
side cover.
Green Ground
Wire
Screw
Valve
Fittings
Screw
Bracket
Continued