Service Procedures; Pump Pressure Adjustment - Desa 125T Serie Manual De Propietario

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.
Screw
Figure 7 - Upper Shell Removal
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.
Fan
Setscrew
Motor Shaft
Figure 8 - Fan, Motor
Shaft and Setscrew
Location
10
Upper Shell
Setscrew
Motor
Fan
Flush
Motor
Shaft
Figure 9 - Fan
Cross Section
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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.
Lint Filter
Air Output Filter
Figure 10 - Air Output, Air Intake and Lint

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.
Pressure
Gauge
Plug
Figure 11 - Pressure Gauge Plug
Removal
Air Intake
Filter
Filters
Relief
Valve
118637-01B
Filter
End
Cover