Desa R35D Service Manual page 20

Hot Surface Ignition Models Service Manual
5 Check for Proper Pump Pressure
Install HA1180 Pressure Gauge or equivalent to rear of
air filter housing. Start heater and adjust air pressure to
specified pressure. Turning adjustment screw clockwise
increases pressure, counterclockwise decreases pres-
sure. The screwdriver must be removed from the slot
after any adjustment before taking a reading on the
gauge. (See Heater Performance Specification, on page
6 for specified pressures). It may be necessary to con-
nect the HA1170 tester in place of the photocell while
adjusting the pressure due to the fast shutdown response
of the control.
Note: Pressure gauge must be scaled in 1/4 pound in-
crements for accurate measurement.
HA1180
Pressure
Gauge
Flat Blade
Screwdriver
Adjustment
Screw
For replacement parts contact:
6 Dirty/Clogged Air Filters in Compressor
Inspect and replace air intake, air output, and lint filter if
necessary. Filters should be replaced after 500 hours of
operation.
Blade
Insert
Rotor
Air Output Filter
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20
Pump
Air
Plate
Intake
Filter
Filter End
Cover
Fan Guard