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IX800 Operation & Service Manual
Lubricating Bearings:
Warning: Disconnect power before servicing bearings.
The main blower has two bearings. They need to be periodically lubricated according to the
schedule below. Some situations may require a change in lubricating periods as dictated
by experience. Generally, a lower quantity of grease at frequent intervals is more effective
than a greater quantity at extended lubrication intervals. Select a grease that is compatible
with a lithium or lithium complex grease.
Hours Run Per Day
Storage: If equipment will be idle for some time, before shutting down, add compatible
grease to the bearing until grease purges from the seals. This will ensure protection of
the bearing, particularly when exposed to severe environmental conditions. After storage
period, add fresh grease to the bearings before starting.
Replacing Belts:
Warning: Disconnect power before servicing belts.
The main blower uses a double belt transmission. It requires the belts to be paired, and
both need to be changed at the same time. Ensure that the blower belt tensioner is in place
and set at just below the first 15° mark on the body of the tensioner arm. Use a 15/16"
wrench on the hex nut in the tensioner body and another wrench on the mounting fastener
to set the tension. Ensure that the tensioner roller is running smoothly.
Adjusting Manifold Pressure:
Connect manometer to the port on the outlet flange of the second stage regulator. While
heater is operating, verify that the inlet pressure is between 7" WC and 14" WC (1.74 kPa
and 3.45 kPa). Connect manometer to manifold pressure tap on burner gas supply line.
Ensure that the gas selector valve is set to the proper fuel. While the heater is operating,
check the manifold pressure. If the manifold pressure differs from specifications, re-adjust.
The adjusting screw is located on top of the appliance regulator. Remove the manometer
and securely tighten the manifold pressure tap.
16
Recommended Lubrication Schedule
Lubrication Interval in Weeks
(2.7 gram per bearing)
8
16
24
Main Blower
5
2
1
Replace if worn.
P/N
974-4135
Rev: 2.51
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