Service manual

COMBAT

UH UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL

14.6 Ignition Control

The control mounts to the heat exchanger plate. Pull

out ignition cable and wiring from board, noting their

positions.

Release the four mounting standoffs.

Refit in reverse. Ensure correct location of ignition

cable and all other wiring.

14.7 Axial Fan/Guard/Motor Assembly

The axial fan unit for the heater is supplied

completely assembled and balanced.

14.7.1 Fan Removal and Replacement

14.7.2 To Replace the Fan Assembly

To replace the fan assembly, reverse the procedure

shown above.

• Check that the fan blades are free to rotate

before turning on the power to the fan.

• Strictly comply with the color code of the fan

wires to ensure correct operation. See Page 19,

Section 9.3 wiring diagram.

• Use only genuine ROBERTS GORDON

replacement parts.

14.8 Limit Switches

14.8.1 Removal and Replacement

1. Remove the electrical connections to the

switch.

2. Unscrew the two screws securing the

switch.

3. Fit a new switch with two screws.

See Page 42, Section 15.3.

4. Reconnect the electrical connections and test

operation.

Description Part Number

Axial Fan UH [A] [AS] 30 12011910

Axial Fan UH [A] [AS] 45 12011911

Axial Fan UH [A] [AS] 60 12011920

Axial Fan UH [A] [AS] 75 12011921

Axial Fan UH [A] [AS] 100 and UH [A] [AS] 125 12011922

Remove the screws

and washers.

Remove the mounting hardware.