COMBAT® CTU UNIT HEATERS INSTALLATION OPERATION AND SERVICE MANUAL
16.6 Ignition Control
IT IS IMPORTANT THAT ONLY THE CORRECT IGNITION CONTROL SPECIFIED FOR EACH MODEL TYPE IS USED WHEN REPLACING THESE ITEMS.
16.6.1 S4565C Models 22 to 60
This control plugs onto the gas valve. Pull out 12 pin electrical connection. Pull out ignition cable and flame probe cable noting their positions
Release screw securing control to gas valve
Refit in reverse. Ensure correct location of ignition and flame probe cables. Ensure that the earth connection is made directly to the earth point on the gas valve.
16.6.2 S4563C Models 75 to 115
This control is mounted at the electrical mounting plate. Pull out the 3 cable connectors.
Pull out ignition cable, ignition earth and flame probe cable noting their positions. Remove the screws. Refit in reverse. Ensure correct location of ignition and flame probe cables.
16.7 CTUA Axial Fan/Guard/Motor Assembly
The axial fan unit for the CTUA heater is supplied completely assembled and balanced.
16.7.1 Fan Removal and Replacement
| Remove the four screws |
| and rubber washers. |
Description | Part Number |
Axial Fan 16 in. | 90710418 |
Axial Fan 500 mm. | 90710419 |
16.7.2 To Replace the Fan Assembly
To replace the fan assembly, reverse the procedure shown above. Fit rubber washers to the guard mountings to reduce vibration.
•Check that the fan blades are free to rotate before turning on the power to the fan.
•Strictly comply with the colour code of the fan wires to ensure correct operation. See Page 16, Section 10.3 through Page 17, Section 10.4 wir- ing diagrams
•Use only genuine ROBERTS GORDON® replacement parts.
16.8CTUB & CTUC Centrifugal Fan/Guard/Motor Assembly
The direct drive fan/s for the CTUB & CTUC range is supplied as a complete assembly. Take careful note of the electrical connections of the fan before disconnecting from the terminals.
For the CTUC versions fitted with an inlet spigot assembly, the fans may be accessed through the removable covers on the sides, top and bottom of the spigot, as required.
16.8.1 Fan Removal and Replacement
20 mm x 5 mm Adhesive Seal
is applied to the flange.
Description | Part Number |
Torin Fan DDC | A047 |
Torin Fan DDC | A049 |
Remove the fan by removing the fixing screws while supporting the weight of the fan (approx. 19 kg).
16.8.2 To Replace the Fan(s)
To reassemble, reverse the procedure shown above.
•Fit new rubber seal between the fan flange and the heater rear panel.
•Fit to the rear panel in the correct orientation as shown on Page 41, Figure 14.
•Strictly comply with the colour code of the fan wires to ensure correct operation. See Page 18, Section 10.5 through Page 20, Section 10.7 wiring diagrams.
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