Lochinvar 065, 495 Servicing Hot Surface Igniter and Ignition Module, Adjusting Air Shutter

Installation and Service Manual

Adjustment Procedure: 1,435,000, 1,795,000 and 2,065,000 Btu/hr Models

1.Remove the upper front jacket panels from the unit to access the upper chamber.

2.Slightly loosen the screws that attach the fan transition box to the metal base (see Figure 46).

3.Locate the air shutter at the rear of the fan duct (see Figure 47). Move the air shutter towards the rear of the unit to increase air pressure. Move the air shutter towards the front of the unit to decrease air pressure.

4.Adjust the air shutter until the differential pressure is nominally 1.1 - 1.3 inches water column. Note: The air chamber pressure is 1.2 inches water column for liquefied petroleum (L.P.) and 1.4 inches water column for natural. See Figure 45 for installations up to 2000 feet altitude. Contact the factory for high altitude settings.

5.Once the adjustment procedure is complete, reattach the caps to the tees in the hoses to the pressure switch and check all tubing and wire connections for a snug fit. Test fire the unit. Reinstall upper panels.

Figure 47 - Adjusting Air Shutter

Servicing Hot Surface Igniter and Ignition Module

This unit uses a proven hot surface ignition module and a hot surface igniter. The hot surface ignition module is not repairable. Any modification or repairs will invalidate the warranty.

￿WARNING: Do not attempt to repair a faulty hot surface igniter or ignition module. Any modification or repairs may create hazardous conditions that result in property damage, personal injury, fire, explosion and/or toxic gases.

Figure 46 - Loosening the Transition Box Screws, 1,435,000, 1,795,000 and 2,065,000 Btu/hr Models Only

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