Service Procedures, Electrical System

Dayton Operating Instructions and Parts Manual

4E769B

Dayton® Propane

Construction Heater

Maintenance (Continued)

SERVICE PROCEDURES

Never attempt to service heater

while it is connected to propane supply, operating, 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 replace motor.

MOTOR REPLACEMENT

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

2.Remove motor and fan guard from heater shell (See Figure 7).

Figure 7 - Removing Motor and Fan Guard from Heater

3.Use pliers to remove the fan nut from front of motor shaft (See Figure 8).

Fan Nut

Figure 8 - Removing Fan Nut from Motor Shaft

4.Remove fan. Be careful not to damage the fan blade pitch.

5.Remove three nuts that attach fan guard to motor using nut-driver. Remove fan guard from motor (See Figure 9).

Figure 9 - Removing or Attaching Fan Guard from Motor

6.Discard old motor.

7.Attach fan guard to new motor using three nuts. When attaching fan guard to motor, you must position power cord as shown in Figure 9. Tighten nuts ﬁrmly.

8.Place fan onto motor shaft of new motor.

IMPORTANT: When placing fan onto motor shaft, make sure part number stamped on fan is facing motor. Attach fan nut to end of motor shaft. Tighten fan nut firmly.

9.Place motor and fan guard into rear of heater shell. Make sure power cord is properly located (See Figure 10).

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

Desa 4E769B operating instructions Service Procedures, Electrical System