www.desatech.com
113170-01E
10
AIR OUTPUT, AIR INTAKE AND LINT
FILTERS
1. Remove upper shell (see Figure 7).
2. Remove filter end cover screws using 5/16"
nut-driver (see Figure 10).
3. Remove filter end cover.
4. Replace air output and lint filters.
5. Wash or replace air intake filter (see
Preventa-
tive Maintenance Schedule
, page 8).
6. Replace filter end cover.
7. Replace upper shell.
IMPORTANT:
Do not oil filters.
Figure 10 - Air Output, Air Intake and Lint
Filters
Air Intake
Filter
Filter
End
Cover
Lint Filter
Air Output Filter
Figure 11 - Pressure Gauge Plug
Removal
Relief
Valve
Pressure
Gauge
Plug
FAN
IMPORTANT:
Remove fan from motor shaft
before removing motor from heater. The weight
of the motor resting on the fan could damage the
fan pitch (see Figure 8).
1. Remove upper shell (see Figure 7).
2. Use 1/8" allen wrench to loosen setscrew
which holds fan to motor shaft.
3. Slip fan off motor shaft.
4. Clean fan using a soft cloth moistened with
kerosene or solvent.
5. Dry fan thoroughly.
6. Replace fan on motor shaft. Place fan hub flush
with end of motor shaft (see Figure 9).
7. Place setscrew on flat of shaft. Tighten setscrew
firmly (40-50 inch-pounds/4.5-5.6 n-m).
8. Replace upper shell.
Motor Shaft
Setscrew
Figure 8 - Fan, Motor
Shaft and Setscrew
Location
Fan
Figure 9 - Fan
Cross Section
Motor
Shaft
Fan
Setscrew
Flush
Motor
PUMP PRESSURE ADJUSTMENT
1. Remove fan guard using medium phillips
screwdriver.
2. Remove pressure gauge plug from filter end
cover (see Figure 11).
3. Install accessory pressure gauge (part number
HA1180).
4. Start heater (see
Operation
, page 5). Allow
motor to reach full speed.
SERVICE PROCEDURES
WARNING: To avoid risk of
burn and electrical shock, never
attempt to service heater while it
is plugged in, operating or hot.
UPPER SHELL REMOVAL
1. Remove screws along each side of heater using
phillips screwdriver. These screws attach upper
and lower shells together. See Figure 7.
2. Lift upper shell off.
3. Remove fan guard.
2
1
Figure 7 - Upper Shell Removal
Upper Shell
Screw
