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UHD LOW PROFILE DUCT FURNACE INSTALLATION OPERATION AND SERVICE MANUAL
42 of 47
15.5 Flue Blower Vertical Installation
IT IS IMPORTANT THAT ONLY THE CORRECT FLUE BLOWER SPECIFIED FOR EACH MODEL TYPE
IS USED WHEN REPLACING THESE ITEMS.
Carry out a start-up after working on or changing a flue blower. See Page 26, Section 11.
MODEL UHD[X][S] 75 UHD[X][S] 100 UHD[X][S] 125
Flue Blower P/N 90710404 90710405 90710405
To remove the blower, remove
screws securing the fan and
mounting plate to the vent box.
To remove the blower from the
mounting plate, remove screws.
Refit in reverse order.
To change the vent and air
intake orientation from back to
top, remove the blower and
mounting plate as above.
Remove intake (if applicable)
and exhaust covers from top of
the heater.
Rotate the blower, mounting
plate and gasket clockwise until
the flue adapter lines up with
the top hole. Secure screws.
If applicable, remove the flexible
air duct from the air intake
adapter on the back.
If applicable, remove the air
intake adapter from the back of
the heater and install in the
appropriate hole on top.
Reconnect the flexible air duct.
Install intake and exhaust
covers over the back holes.
NOTE: Separated combustion model shown.