34
RP-HRPD-IOM (07-22) 132210-B
MAINTENANCE
⚠ WARNING ⚠
If you turn OFF the power supply, turn OFF the gas.
⚠ CAUTION ⚠
When cleaning, wearing eye protection is recommended.
NOTE: Use only factory-authorized replacement parts.
This unit will operate with a minimum of maintenance . To ensure long life and satisfactory performance, a furnace
that is operating under normal conditions should be inspected every 4 months . If the furnace is operating in an
area where an unusual amount of dust, soot, or other impurities are present in the air, more frequent inspection is
recommended .
Service Checklist
The following section is designed to aid a qualified service person in maintaining and servicing this equipment . At
a minimum, perform the following annually:
Inspect filters and clean or replace as necessary .
Inspect blower and belt—check belt for tension, wear, and alignment (adjust or replace as needed) and clean
dirt from blower and motor .
Check gas valve to ensure that gas flow is being shut off completely .
Clean heat exchanger both internally and externally .
Check pilot burner and main burners for scale, dust, or lint accumulation and clean as necessary .
Clean all dirt and grease from primary and secondary combustion air openings .
Power vent:
Check flue products outlet and clean as necessary .
Gravity vent:
Check vent cap or optional vent system and replace any parts that do not appear sound .
Check main burner ports, carryover assemblies, and orifices for cleanliness .
Check wiring for any damaged wire—replace damaged wiring (refer to
requirements) .
Maintenance Procedures
Combination Gas Valve Maintenance
⚠ WARNING ⚠
The combination gas valve is the prime safety shutoff. To ensure positive closure, all gas supply
lines must be free of dirt or scale before connecting the unit.
Remove external dirt accumulation and check wiring connections . The combination gas valve must be checked
annually as follows to ensure that the valve is completely shutting off gas flow .
1 . Locate 1/8-inch FPT INLET pressure tap on combination gas valve (see
) .
NOTE: A manometer (fluid-filled gauge) with an inches water column scale is recommended.
2 . With field-installed manual valve closed to prevent flow to gas valve, connect manometer to 1/8-inch FPT INLET
) .
3 . With field-installed manual valve closed, turn up thermostat to fire unit and to allow unit to go through one trial
for ignition .
