Thermo Products OPB (24, 36)- 80, 30 D. Supply/Return Air Blower, E. Supply/Return Air Filter

All installations and services must be performed by qualified service personnel.

D. Supply/Return Air Blower

Check in the blower compartment for dust, dirt, debris, and for the presence of insects. Remove any foreign material. Clean the blower wheel, housing, and compartment of dust and lint with a vacuum.

The blower motor has sealed bearings that are permanently lubricated. The blower motor bearings do not require oil or any type of additional lubrication.

E. Supply/Return Air Filter

A permanent-type air filter is provided in the return section of this unit. This filter should be inspected regularly. When the filter is dirty, it should be cleaned or replaced to assure proper heating/cooling system operation. Follow the cleaning, removal and replacement procedure below.

1.Filter maintenance procedure

The filter rack is located behind an access panel on the left-hand side of the unit, refer to Figure 12. Shut off the electrical power to the unit. Remove the screws retaining the access panel to the housing. Remove the access panel. Slide the dirty air filter out of the filter rack. Clean the filter by either vacuuming, rinsing with tap water, hosing, or dipping in an ordinary detergent solution. After cleaning and drying the filter, replace the completely dry filter in the rack. If the filter has a supporting mesh, the mesh side of the filter must be placed towards the furnace.

Figure 12: Location of the OPB Supply/Return Air Filter

2.Filter replacement

To ensure an adequate replacement filter is selected, should the filter require replacing, refer to Table 4, in Air Filters section of this manual, for the minimum filter areas required for different types of available filters.

50