Hastings DIRECT GAS FIRED ELECTRIC STEAM, Installation And Service Instructions Manual, Page: 15 / 36

Winter Operation
If the entering air temperature is below the entering air controller setpoint and the blower is operating, the heating
coil valve is energized and powered open, and the heat “on” light is energized on the remote control panel.
Discharge air temperature is controlled by discharge air controller.
If the entering air temperature is above the entering air controller setpoint, the heat is de-energized and the blower
continues to operate.
J. MISCELLANEOUS MAINTENANCE
1.
2. Blowers – check blower and related components at least twice yearly.
Blower motor bearings need periodic lubrication. Motor bearings vary with size and type of application. Refer to motor
instructions for proper maintenance schedule. Belts must be tightened as explained previously if so required. Check
pulleys for proper alignment
3. Lubricate main fan bearing with a high grade lithium base grease. Perform at least every quarter (three months) or
schedule according to equipment use.
4. Blower belts should be checked twice a year for wear and adjustment - See data below.
5. Burner - Check orifice openings annually - contact factory for proper orifice drill size for cleaning.
Filters – check filters at least once each season and clean or replace as necessary.
Standard filters are of the heavy duty fiberglass mesh throw-away type. No attempt should be made to clean and re-
use these filters. Replacement filters should be an equivalent to the type supplied standardly with the unit. See bill of
material for size, type, and number required.
The optional cleanable filters are of the high velocity aluminum mesh type. These filters may be washed with water, as
the mesh is originally coated with a water soluble oil solution. The filters should be dried and recoated with oil solution,
such as “Evans Filter Fluid”. Replacements for damaged filters should be of an equivalent type as originally supplied
with the unit. See bill of material for size, type and number required. The oil coating solution is available from the filter
manufacturer.
Filter racks as supplied with some sizes of SB units may have at least one filter spacer to eliminate the by-passing of
unfiltered air. These spacers (if used) must be re-installed after the completion of any maintenance work.
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