Desa 110, 35 Service Procedures, Upper Shell Removal, Air Output, Air Intake, and Lint Filters

SERVICE PROCEDURES

Upper Shell Removal

1.Remove screws along each side of heater using 5/16" nut-driver. These screws attach upper and lower shells together.

2.Lift upper shell off.

3.Remove fan guard.

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.

!WARNING

Never service heater while it is plugged in, operating, or hot. Severe burns and electrical shock can occur.

Upper		Upper
Shell	Fan	Shell	Fan
			Guard
	Guard

Figure 7 - Upper Shell Removal,	Figure 8 - Upper Shell Removal,
35/50/55/70,000 BTU/Hr Models	100/110/150,000 BTU/Hr Models

1.	Remove upper shell (see above).
2.	Use 1/8" allen wrench to loosen
	set-screw which holds fan to motor
	shaft.
3.	Slip fan off motor shaft.
4.	Clean fan using soft cloth mois-
	tened with kerosene or solvent.
5.	Dry fan thoroughly.
6.	(35/50/55/70/100,000 BTU/Hr
	Models) Replace fan on motor
	shaft. Place fan hub flush with end
	of motor shaft (see Figure 9).
	(150,000 BTU/Hr Model) Replace
	fan on motor shaft. Make sure set
	screw is touching back of flat
	surface on motor shaft (see Figure
	10).
7.	Place setscrew on flat of shaft.
	Tighten setscrew firmly (40-50

Fan

Motor

Flush

Motor

Shaft

Setscrew

Fan

Back of Flat

Surface on

Motor Shaft

Setscrew	Motor
	Shaft
Motor

inch-pounds).

8. Replace fan guard and upper shell.

Air Output, Air Intake, and Lint Filters

1.Remove upper shell (see above).

2.Remove filter end cover screws using 5/16" nut-driver.

3.Remove filter end cover.

4.Replace air output and lint filters.

5.Wash or replace air intake filter (see Preventative Maintenance Schedule, page 8).

6.Replace filter end cover.

7.Replace fan guard and upper shell.

IMPORTANT: Do not oil filters.

10

Figure 9 - Fan Cross Section		Figure 10 - Fan Cross Section
35/50/55/70/100/110,000 BTU/Hr Models		150,000 BTU/Hr Model
Air Intake		Air Intake
Filter		Filter
Filter End		Filter End	Fan Guard
Cover	Fan	Cover
	Guard

Lint Filter	Lint Filter
Air Output	Air Output
Filter	Filter
Figure 11 - Air Output, Air Intake,	Figure 12 - Air Output, Air Intake,
and Lint Filters, 35/50/55/70,000	and Lint Filters, 100/110/150,000
BTU/Hr Models	BTU/Hr Models

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