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7 Installation
This furnace can be installed in upflow or horizontal orientations.
(see Section 7.3, Fig 13-18).
7.1 Upflow Installation
Bottom return air inlet
These furnaces are shipped with the bottom closure panel installed in bottom
return-air opening. Remove and discard this panel when bottom return air is used.
To remove bottom closure panel, perform the following:
1.
Tilt or raise furnace and remove the screw holding bottom filler panel. (See
Fig. 7.)
2.
Remove bottom closure panel.
BOTTOM FILLER
PANEL
Figure 7
Removing bottom closure panel
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Figure 8
Upflow Application-Setting Equipment
Bosch 96% AFUE Condensing Gas Furnace - BTC 770503101 J (06.2023)
SCREW
SCREW
BOTTOM CLOSURE PANEL
Upflow Installation
Tilt the unit slightly (minimum 1/2 (12.7 mm) to maximum of 3/4 (19 mm))
from back to front to aid in the draining of the heat exchanger.
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Side return air inlet
These furnaces are shipped with bottom closure panel installed in bottom return-air
opening. This panel MUST be in place if only side return air is used.
Depending on the installation requirements, side return-air openings can
be used in UPFLOW and most HORIZONTAL configurations.
These furnaces come standard with knockout holes to aid in right/left
return configurations. To do this, knockout the holes and cut the sheet
metal and insulation accordingly.
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Installation Instructions
1/2"~3/4"
| 13
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