
8.5.4 Preheater Cleaning
How often?
Once per year.
Tools Required:
3/4 in. wrench, pipe wrench or vice, wire brush, one gallon of 140°F (60°C) + flashpoint parts
washer fluid, safety glasses, rubber gloves.
Replacement Parts:
Preheater Gaskets (Qty=2) PN 20940122 (2 5/8” O.D.)
Removing Preheater
Procedure - All Models (refer to figures):
1. Wear all safety equipment.
2. Unplug the burner at the cabinet wiring box.
3. Disconnect the Preheater Connector at the Burner Wiring Box, allow it to cool.
Until the preheater has cooled, the parts and the oil are hot.
4. Close the preheater inlet valve and disconnect the fuel tubing from the Inlet and Outlet
Ports of the Preheater.
5. Remove the Preheater mounting bolt and Preheater from the burner.
Unplug burner
Preheater Inlet Valve
Preheater Outlet Tubing
Preheater
Connector at
burner wiring box.
Mounting bolt
52
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