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 5/16" nut-driver. These screws attach upper and lower shells together. See Figure 10 or 11.

2.Lift upper shell off.

3.Remove fan guard.

Screw

Upper Shell

 

Fan Guard

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 13).

7.Place setscrew on flat of shaft. Tighten setscrew firmly (40-50 inch-pounds/4.5-5.6 n-m).

8.Replace fan guard and upper shell.

Fan

Setscrew

Motor Shaft

Figure 12 - Fan, Motor Shaft, and

Setscrew Location

Motor Setscrew

Fan

 

Figure 10 - Upper Shell Removal,

40/50/55/60/70 Models Only

Screw

Upper Shell

Fan

Guard

Figure 11 - Upper Shell Removal, 110/115/155/165/200 Models Only

Flush

Motor

Shaft

Figure 13 - Fan Cross Section

AIR OUTPUT, AIR INTAKE AND LINT FILTERS

1.Remove upper shell (see Figure 10 or 11).

2.Remove filter end cover screws using 5/16" nut- driver (see Figure 14 or Figure 15, page 10).

3.Remove filter end cover.

4.Replace air output and lint filters.

5.Wash or replace air intake filter (see Preven- tative Maintenance Schedule, page 7).

FAN

IMPORTANT: Remove fan from motor shaft be- fore removing motor from heater. The weight of the motor resting on the fan could damage the fan pitch (see Figure 12).

1.

Remove upper shell (see Figure 10 or 11).

2.

Use 1/8" allen wrench to loosen setscrew

 

which holds fan to motor shaft.

Lint Filter

Air Intake Filter

Filter End

Cover

Air Output Filter

3. Slip fan off motor shaft.

Figure 14 - Air Output, Air Intake, and Lint Filters, 40/50/55/60/70 Models Only

113282-01C

www.desatech.com

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Desa BTU/HR owner manual Service Procedures, Upper Shell Removal, AIR OUTPUT, AIR Intake and Lint Filters, Fan

BTU/HR specifications

Desa BTU/HR is an innovative energy solution that emphasizes efficiency and sustainability in thermal energy generation. Designed with the modern consumer in mind, the Desa BTU/HR platform integrates advanced technologies to optimize heating systems for both residential and commercial applications.

At its core, Desa BTU/HR operates on the principle of maximizing thermal energy while minimizing waste. This is achieved through state-of-the-art heat exchangers and combustion technologies that ensure a higher yield of usable heat per unit of fuel consumed. By utilizing a variety of inputs, including biomass, natural gas, and renewable sources, Desa BTU/HR caters to a range of energy requirements, making it versatile for diverse environments.

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