Carrier F97CMN Installation, Start-Up, Operating And Service And Maintenance Instructions Download

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F97CMN and G97CMN: 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.

A150580

NOTE:

Local codes may require a drain pan and condensate trap when a

condensing furnace is installed over a finished ceiling.

Fig. 25 – Working Platform for Attic Installation

A150581

NOTE:

Local codes may require a drain pan and condensate trap when a

condensing furnace is installed over a finished ceiling.

Fig. 26 – Suspended Furnace Installation

Leveling Legs (If Desired)

In upflow position with side return inlet(s), leveling legs may be used,

see

Fig. 27

. 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 flash to install leveling

legs. To remove bottom closure panel, see

Fig. 23

To install leveling legs:

1. Position furnace on its back. Locate and drill a hole in each bottom

corner of furnace.

2. For each leg, install nut on bolt and then install bolt with 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. 27 – Leveling Legs

Location Relative to Cooling Equipment

The cooling coil must be installed parallel with, or on the downstream

side of the unit to avoid condensation in the heat exchangers. When

installed parallel with the furnace, dampers or other flow control must

prevent chilled air from entering the furnace. If the dampers are

manually operated, they must be equipped with means to prevent

operation of either unit unless the damper is in the full-heat or full-cool

position.

Platform Furnace Support

Construct working platform at location where all required furnace

clearances are met, see

Table 1

and

Fig. 25

. For furnaces with 1-in. (25

mm) clearance requirement on side, set furnace on non-combustible

blocks, bricks or angle iron. For crawlspace installations, if the furnace

is not suspended from the floor joists, the ground underneath furnace

must be level and the furnace set on blocks or bricks.

Suspended Furnace Support

The furnace must be supported under the entire length of the furnace

with threaded rod and angle iron, see

Fig. 26

. Secure angle iron to

bottom of furnace as shown.

2-IN.

(51 mm)

ROLLOUT PROTECTION REQUIRED

Install 12” x 22” (305x559 mm) sheet metal in front of burner compartment
area. The sheet metal MUST extend underneath the furnace casing by 1-in.
(25 mm) with the door removed. The bottom closure panel may be used for
flame roll-out protection when bottom of furnace is used for return air connection.

30 IN. (762 mm)

MIN. WORK AREA

COMBUSTION - AIR PIPE
(SEE VENTING SECTION)

2-IN.

(51 mm)

COMBUSTION-AIR PIPE
(SEE VENTING SECTION)

Install 12” x 22” (204 x 559 mm) sheet metal in front of and above the burner compartment area.
The sheet metal MUST extend above the furnace casing by 1-in. (25 mm with the door removed.
A 1-in. (25 mm) clearance minimum between top of furnace and combustible material is required.
The entire length of furnace must be supported when furnace is used in horizontal position to
ensure proper drainage.

NOTE: FURNACE SHOWN IS A DIRECT-VENT APPLICATION. REFER TO THE VENTING SECTION FOR
ALLOWABLE VENT CONFIGURATIONS.

ROLLOUT PROTECTION REQUIRED