Reznor RA 140 Troubleshooting Guide download pdf (Page 33)

Form I-RA/D 140/235 (Version A), Mfg No. 110318 Rev 3, Page 33

Outer

Cylinder

Inner

Cylinder

Maintenance

Procedures

Continued

Cleaning Oil

Pre-Heater

System Con-

tinued

3. Clean the Pre-heater

• Place the pre-heater in a vice and carefully remove the outer cylin-

der and the “O” ring. NOTE: There will be oil in the pre-heater.

• Clean the inner section with a cloth and degreaser such as carbure-

tor cleaner. Be careful not to “clean” the electrical controls. Do not

immerse in cleaning fluid.

• Clean the outer portion of the cylinder with degreaser.

4. Reassemble the Pre-Heater and the heater.

• Check the “O” ring. If a new one is required, replace with P/N 132224.

• Reassemble the cylinder pieces with “O” ring in place.

• Slide the pre-heater in the box and attach the front support. Reconnect the wires and the fuel lines

and close the corner cover.

• Replace the burner assembly and reconnect the ignition controller.

Cleaning Exterior Surfaces of Combustion Chamber, Heat

Exchanger and Air Moving Device

WARNING: Turn off the electric power before cleaning heater.

To gain access to the front side of the combustion chamber/heat exchanger, remove the discharge louvers.

To access the rear side, remove the fan assembly or blower assembly.

To remove the air moving device, disconnect the wiring in the fan/blower junction box and the flexible conduit.

• Use a stiff brush and a shop vacuum to clean the accumulated dust and dirt from the exterior surface of

the combustion chamber and the heat exchanger.

• Clean the air moving device (fan or blower). Use a brush and a shop vacuum, being careful not to bend

or damage either the fan blade or the blower wheel. Use a shop vacuum to remove accumulated dirt

from the motor.

• Replace the air moving device and the discharge louvers.

• Connect the flexible conduit and wiring.

Check operation.

Cleaning ensures maximum efficiency and eliminates the possibility of the heater cycling on the limit switch

from lack of air flow.

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Reznor RA 140 Troubleshooting Guide Page 33