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HRCF-08122022 - V 1.1
15
Removal or replacement of the windows is done when the heater is cold (at ambient temperature),
and requires a 5/64” hex wrench. Wear gloves when performing this procedure.
1. Unscrew the three 6-32 x 3/8” button head screws which secure the window retaining ring
(LA-11-406). Be careful not to drop the screws or retaining ring into the furnace case.
2. Carefully remove the window. Do not let it fall into the furnace case.
3. Install the replacement window in reverse order.
4.2 WINDOW REPLACEMENT PROCEDURE
Figure 12 - Remove screws in window retaining ring
Figure 13 - Carefully remove and replace window