Service manual

UHA STANDARD UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL
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15.10.1 Fan Removal and Replacement
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.
Description Part Number Qty.
Axial Fan UHA[T][M][X][S] 150 - 175 90710417 1
Axial Fan UHA[T][M][X][S] 200 - 250 90710417 1
Axial Fan UHA[T][M][X][S] 300 - 400 90710416 2
15.10.2 To Replace the Fan Assembly
To replace the fan assembly, reverse the procedure
sho
wn above.
• Check that the fan blades are free to rotate
bef
ore turning on the power to the fan.
• Strictly comply with the color code of the fan
wir
es to ensure correct operation. See Page 22,
Section 10.3, Page 24, Section 10.5 or Page 26,
Section 10.7 wiring diagram.
• Use only genuine replacement parts sold and
supplied b
y Addison.
15.11 Limit Switches
15.11.1 Removal and Replacement
1. Remove the electrical connections to the
s
witch.
2. Unscrew the two screws securing the switch.
3. Fit a new switch with two screws.
4. Reconnect the electrical connections and test
oper
ation.