– 24 –
SECTION VIII - MAINTENANCE SCHEDULE AND LUBRICATION REQUIREMENTS
5. Quarterly
a. Complete the monthly maintenance schedule.
b. Inspect all drives for proper belt tension and wear.
c. Check the alignment of the sheaves and adjust if
necessary.
d. Inspect all bearings set screws for tightness and lubri-
cate bearings if necessary.
e. Check the
fl
ame and spark rod wiring and connections.
f. Check the
fl
ame and spark rods. Replace if necessary.
g. Inspect the burner carefully. Clean and adjust if nec-
essary.
h. Check voltages and amp draw on main fan motor.
i. Check the operation of all safety controls individually.
j. Check the operation of the automatic gas shut off
valves and check them for leakage at the pressure
test ports provided.
k. On vertical units inspect burner clean out and drain if
necessary.
6. Off Season or Yearly
a. Complete the monthly and quarterly maintenance
schedule.
b. Inspect all fan wheels and housings. Clean if necessary.
c. Check that all fan wheels, sheaves, and couplings are
securely set on the shaft.
d. Inspect all bearings and alignment. Adjust if necessary.
e. Inspect all V-belts, sheaves, and coupling inserts.
Replace if necessary.
f. Inspect all electrical components, connections and
terminals. Clean and tighten where necessary.
g. Test ignition spark. Adjust gap if necessary.
h. Clean ignition electrodes and check for cracks.
i. Test
fl
ame safeguard relay and replace components if
necessary.
j. Inspect all regulators, relief valves, motorized valves,
solenoid valves, vent valves, manual shut off valves
and safety shut off valves. Check their operation and
clean as necessary.
k. Ensure all vents to the atmosphere are clean and free
from obstruction.
l. Inspect and clean all drip legs in the fuel line.
m. Lubricate fan motor as directed by motor manufac-
turer.
n. Inspect fan motor wiring for loose connections.
o. Lightly oil all door latches.
p. Check that cabinet is weathertight, replace door gas-
kets and recaulk as necessary.
q. Check all nuts and bolts for tightness.
NOTE: Keep screened air intakes clear of obstruc-
tions at all times.
WARNING: Failure to comply with the general
safety information may result in extensive
property damage, severe personal injury or
death.
Periodic maintenance is essential to the ef
fi
cient
operation and extended service life of this equipment.
Failure to provide maintenance as recommended may
void the equipment warranty.
A. Maintenance Schedule
1. Daily
a. Check gauges, monitors, instruments and equipment
settings.
2. After 8 hours of operation
a. Check that fan belts are tight and sheaves are
aligned. The fan belts can be checked every 30 days
after the
fi
rst 60 days of new belt run-in. CAUTION:
Do not overtighten belts.
b. Check set screws and bolts on the fan, bearings,
couplings, and burner assembly.
c. Check gas pressure at regulator.
3. After 48 hours of operation, check bearings for any
unusual vibration or excessive temperature.
4. Monthly
a. Check all valves, piping and connections for leaks.
b. Check the
fl
ame signal and safety lockout (RE-02).
c. Check the fuel pressure in the fuel supply line to each
heater.
d. Check the burner manifold pressure at full
fi
re
and low
fi
re. At low
fi
re setting, be sure there
is a continuous
fl
ame along the entire burner
length without any blowout spots.
e. Clean the
fl
ame sensor.
f. Inspect
fi
lters. Clean or replace as necessary.
g. Inspect the main fan bearings, lubricate if necessary.
See Section VIII on bearing maintenance.
h. Check all dampers, damper actuators and linkages.
Adjust and tighten if necessary.
i. Ensure that there are no obstruction blocking the
air supply to the heater or the air discharge from the
heater.
j. Inspect the area and make sure that no combustible
or hazardous material has been stored within the
clearances as shown on the unit nameplate.
k. Check and clear all air sensing tubes and
fi
ttings. CAUTION: Remove tubes from switches,
transducers, and
fl
ow station before using
compressed air to blow through tubing.
l. Test ignition spark. There should be a
continuous spark for 10 seconds with last gas
cock turned off.
