30,000 BTU/Hr

PROPANE CONSTRUCTION HEATER

SERVICE

PROCEDURES

You can also visit DESA International’s

Technical Service web site at

www.desatech.com.

WARNING: Never service heater while it is plugged in, con- nected to propane supply, oper- ating, or hot. Severe burns and electrical shock can occur.

ELECTRICAL SYSTEM

The entire electrical system for this heater is contained within the motor. If any part of the

Figure 9 - Removing Motor and Fan Guard from Heater

electrical system is damaged, you must re- place motor.

MOTOR

1.Remove three screws that attach fan guard to heater shell.

2.Remove motor and fan guard from heater shell (see Figure 9).

3.Use hex wrench to loosen set screw which holds fan to motor shaft (see Fig- ure 10). Remove fan. Be careful not to damage the fan blade pitch.

4.Remove two nuts and two screws that attach fan guard to motor using nut- driver. Remove fan guard from motor (see Figure 11).

5Disconnect the green power cord wire from motor and remove black and white wire terminals.

6.Discard old motor.

7.Attach green power cord wire to motor.

8.Attach fan guard to new motor with two nuts and two screws.

9.Replace black and white terminals.

10.Place fan onto motor shaft of new mo- tor. Make sure set screw contacts flat surface on motor shaft. Tighten set screw firmly (40-50 inch-pounds).

11.Place motor and fan guard into rear of heater shell. Make sure power cord is properly located (see Figure 12).

12.Insert three screws through heater shell and into fan guard. Tighten screws firmly.

Setscrew

 

Figure 10 - Setscrew Location

Figure 11 - Removing or Attaching Fan

 

Guard from Motor

Figure 12 - Replacing Motor and Fan Guard into Heater

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Desa RM30LP owner manual Service Procedures, Electrical System, Motor

RM30LP specifications

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