Desa H.S.I. Series Owner's Manual page 8

200,000 btu/hr portable forced air heater with built-in thermostat
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• SERVICE PROCEDURES
SERVICE
PROCEDURES
Continued
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
replace in tank.
6.
Attach lower fuel line to fuel valve
fitting.
7.
Replace side cover.
FUEL VALVE
1.
Remove side cover (see Figure 9),
fan guard, and upper shell (see Fig-
ure 5, page 7) screws using 5/16"
nut-driver.
2.
Remove fan (see Fan, page 7).
3.
Pull lower fuel line off the fuel valve
fitting (see Figure 11).
WARNING: High Voltage
4.
Disconnect red and white wires from
fuel valve (see Figure 11).
5.
Using 1/4" nut driver remove 2 screws
holding fuel valve and bracket to lower
shell (see Figure 11). Save these screws.
6.
Using 1/4" nut driver remove 2 screws
holding fuel valve to bracket. Save
these screws.
7.
Attach new fuel valve to bracket with
2 screws.
8.
Install new fuel valve and bracket on
lower shell with 2 screws.
9.
Connect red and white wires (polarity
not important). Connect upper and lower
fuel lines to fuel valve (see Figure 11).
10. Replace fan, fan guard, upper shell, and
side cover.
For more information, visit www.desatech.com
Screw
Side Cover
Figure 10 - Fuel Filter Removal
Electrical Wires
Lower Fuel
Line
Figure 11 - Fuel Valve Replacement
8
Bushing, Lower Fuel Line,
and Fuel Filter
Fuel Valve Fitting
Fuel Valve
Valve
Fittings
Screw
Bracket
Screw
107325

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