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UHA STANDARD UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL
46 of 51
15.9.1 Fan Removal and Replacement
*For units built after July 2011.
For units built before July 2011, P/N 90710416.
15.9.2 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 24,
Section 10.5 wiring diagram.
• Use only genuine replacement parts sold and
supplied by Roberts-Gordon LLC.
15.10 Limit Switches
15.10.1 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.
4. Reconnect the electrical connections and test
operation.
Description Part Number Qty.
Axial Fan UHA[X][S] 150 - 175 90710417* 1
Axial Fan UHA[X][S] 200 - 250 90710417 1
Axial Fan UHA[X][S] 300 - 400 90710416 2
WARNING
Severe Injury Hazard
Turn off gas and electrical supply before
service.
Fan can start automatically at any time.
Failure to follow these instructions can
result in severe injury or product damage.
Remove the screws
and washers.