Table of Contents
Advertisement
935SB: Installation, Start-up, Operating and Service Maintenance Instructions
Connect supply-air duct to flanges on furnace supply-air outlet. Bend
flange upward to 90° with wide duct pliers (see
duct must be connected to ONLY the furnace supply-outlet-air duct
flanges or air conditioning coil casing (when used). DO NOT cut main
furnace casing side to attach supply air duct, humidifier, or other
accessories. All supply-side accessories MUST be connected to duct
external to furnace main casing.
Fig. 27 – Duct Flanges
NOTE: Coil offset kits do not meet the 8-in. separation between the coil
pan and furnace if required
(Table
extension to achieve an 8-in. total separation is required.
Return Air Connections
WARNING
!
FIRE HAZARD
A failure to follow this warning could cause personal injury, death
and/or property damage.
Never connect return-air ducts to the back of the furnace. Follow
instructions below.
The return-air duct must be connected to bottom, sides (left or right), or a
combination of bottom and side(s) of main furnace casing. Bypass
humidifier may be attached into unused return air side of the furnace
casing (see
Fig. 28
and
Fig.
29).
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Fig.
27). The supply-air
A190216
7). Additional metal shield or an
Fig. 28 – Upflow Return Air Configurations and Restrictions
NOTE: For Upflow Right Side Return, use upflow offset installation for
condensate trap.
Fig. 29 – Horizontal Return Air Configurations and Restrictions
Bottom Return Air Inlet
These furnaces are shipped with 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 (see
Side Return Air Inlet
These furnaces are shipped with bottom closure panel installed in bottom
return-air opening. This panel MUST be in place when only side return
air is used. Where required by code, seal bottom closure to furnace with
tape, mastic or other durable sealing method.
NOTE: For allowable side returns in horizontal configurations (see
Fig.
29).
!
Upflow installations utilizing the right side air return opening should
follow the Upflow Specific Steps - Offset Installation to ensure the full
opening is available for return ductwork.
Leveling Legs (If Desired)
In upflow position with side return inlet(s), leveling legs may be used.
(see
Fig.
30). Install field-supplied, 5/16 x 1-1/2 in. (8 x 38 mm) (max)
corrosion-resistant machine bolts, washers and nuts.
18
Fig.
34).
NOTICE
A200426
A200425
Advertisement
Table of Contents
