Process Technology Lufran LUF Series Manual page 55

Maintenance Procedures (Continued):
Procedure M7-2: Cooling Fan Replacement Procedure:
1) If the unit is in LOCAL mode, press the HEATER ON/OFF button to the OFF position. If the unit is in
REMOTE mode disable the heater from the customer supplied remote controller. This will also
prevent the heaters from energizing.
2) Turn OFF Power to the unit.
Vérifiez que l'alimentation électrique est coupée,
et tous les périphériques de verrouillage /
débranchement nécessaires sont correctement
installés.
Cooling fan located in heater side of the cabinet:
3) Open the rear cabinet door.
4) If the cooling fan is wired to a multi-port sensor/actuator box located on the back panel, then
disconnect the plug for the leak detector. When included, this fan unit is usually connected to port 2,
but refer to your electrical prints to confirm the correct port number. If the wires for the cooling fan are
hard-wired to terminals on the low-voltage electrical panel, disconnect the wires from those terminals.
Refer to the electrical print for the specific terminal numbers.
5) Disconnect the fan wires from the connector plug, if applicable.
6) Remove the cooling fan and fan guard from the sidewall of the cabinet.
7) Wire the leads for the replacement cooling fan the connector plug, if necessary.
8) Attach the replacement fan and fan guard to the side of the cabinet.
9) If the heater has the multi-port sensor/actuator box, then connect the plug for the cooling fan to the
appropriate connection on the box. If the wires for the cooling fan were connected to terminals on the
low voltage electrical panel, then connect the wires to the appropriate terminals.
10) Remove lockout-tagout items. Power up the unit. Confirm that the replacement fan is operating.
Cooling fan located in the electrical side of the cabinet:
3) Open the front cabinet door.
4) Locate the power wires going from the cooling fan to the terminal blocks on the low voltage panel.
Refer to the electrical prints of the unit for the correct terminal block numbers. Disconnect the fan
wires from the terminal blocks.
5) Remove the cooling fan and fan guard from the sidewall of the cabinet.
6) Attach the replacement fan and fan guard to the side of the cabinet.
7) Connect the replacement cooling fan wires to the terminal blocks.
8) Remove lockout-tagout items. Power up the unit. Confirm that the replacement fan is operating.
M-43-25
Revision - Date 03-01-04-18
Verify that the electrical supply is shut off, and any
necessary lockout/tagout devices are properly
installed.
54
LUF-Series Lufran Manual
Standard outlet, Standard Interface