Carrier bryant 830CA, User Manual

Page: 9 / 40

830CA: Installation, Start–Up, Operating and Service and Maintenance Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
9
Leveling Legs (If Desired)
In upflow position with side return inlet(s), leveling legs may be used,
see Fig. 10 . Install field-supplied, 5/16 x 1-1/2 in. (8 x 38 mm) (max)
corrosion-resistant machine bolts, washers and nuts.
NOTE: Bottom closure must be used when leveling legs are used. It
may be necessary to remove and reinstall bottom closure panel to install
leveling legs. To remove bottom closure panel, see Item 1. in Bottom
Return Air Inlet section.
To install leveling legs:
1. Position furnace on its back. Locate and drill a hole in each bottom
corner of furnace, see Fig. 10 .
2. For each leg, install nut on bolt and then install bolt and nut in hole.
(Install flat washer if desired.)
3. Install another nut on other side of furnace base. (Install flat washer
if desired.)
4. Adjust outside nut to provide desired height, and tighten inside nut
to secure arrangement.
5. Reinstall bottom closure panel if removed.
A89014
Fig. 10 – Leveling Legs
DOWNFLOW INSTALLATION
NOTE:
For downflow applications, this furnace is approved for use on
combustible flooring when any one of the following 3 accessories are
used:
• Downflow combustible floor subbase
• Manufacturer’s approved Cased Coil or Coil Casing
1. Determine application being installed from Table 4 .
2. Construct hole in floor per Table 4 and Fig. 11 .
3. Construct plenum to dimensions specified in Table 4 and Fig. 11 .
4. If downflow subbase is used, install as shown in Fig. 12 . If Coil or
Coil Casing, install as shown in Fig. 13 .
NOTE:
It is required that the perforated supply-air duct flanges be
completely folded over or removed from furnace when installing the
furnace on a factory-supplied cased coil or coil box. To remove the
supply-air duct flange, use wide duct pliers or hand seamers to bend
flange back and forth until it breaks off. Be careful of sharp edges, see
Fig. 17 .
A96283
Fig. 11 – Floor and Plenum Opening Dimensions
A96285
Fig. 12 – Furnace, Plenum, and Subbase Installed
on a Combustible Floor
A08556
Fig. 13 – Furnace, Plenum, and Coil Assembly or
Coil Box Installed on a Combustible Floor
1
3
/
4
1 3 /
4
1
3/
4
1
3/
4
5/
16
5
/
16
5/
16
5/
16
(44mm)
(8mm)
(44mm)
(8mm)
(8mm)
(8mm)
(44mm)
(44mm)
PLENUM
OPENING
C
A
B D
FLOOR
OPENING
DOWNFLOW
SUBBASE
SHEET METAL
PLENUM
FLOOR
OPENING
FURNACE
(OR COIL CASING
WHEN USED)
COMBUSTIBLE
FLOORING
APPROVED
COIL ASSEMBLY
OR
COIL BOX
FURNACE
SHEET METAL
PLENUM
FLOOR
OPENING
COMBUSTIBLE
FLOORING