50,000 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 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 10).
3.Use hex wrench to loosen set screw which holds fan to motor shaft (see Fig- ure 11). 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 12).
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
11.Place motor and fan guard into rear of heater shell. Make sure power cord is properly located (see Figure 13).
12.Insert three screws through heater shell and into fan guard. Tighten screws firmly.
Figure 10 - Removing Motor and Fan Guard from Heater
Setscrew
Figure 11 - Setscrew Location | Figure 12 - Removing or Attaching Fan |
| Guard from Motor |
Figure 13 - Replacing Motor and Fan Guard into Heater
8 | 105331 |
