Carrier 58CTA/CTX User Manual download pdf (Page 12)

Platform Furnace

Support

Construct working platform at location where all required furnace

clearances are met. (See Fig. 2 and 17.) 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.

Roll--Out Pr

otection

Provide a minimum 17--3/4--in. x 22--in. (451 x 559 mm) piece of

sheet metal for flame roll--out protection in front of burner area

for furnaces closer than 12 inches (305 mm) above the

combustible deck or suspended furnaces closer than 12 inches

(305 mm) to joists. The sheet metal MUST extend underneath the

furnace casing by 1 in. (25 mm) with the door removed.

The bottom closure panel on furnaces of widths 17--1/2 in. (445

mm) and larger may be used for flame roll--out protection when

bottom of furnace is used for return air connection. See Fig. 17

for proper orientation of roll--out shield.

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,

perform the following:

1. Tilt or raise furnace and remove 2 screws holding bottom

filler panel. (See Fig. 9.)

2. Rotate bottom filler panel downward to release holding

tabs.

3. Remove bottom closure panel.

4. Reinstall bottom filler panel and screws.

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

side return air inlet(s) are used without a bottom return air inlet.

PLENUM

OPENING

FLOOR

OPENING

A96283

Fig. 11 -- Floor and Plenum Opening Dimensions

DOWNFLOW

SUBBASE

SHEET METAL

PLENUM

FLOOR

OPENING

FURNACE

(OR COIL CASING

WHEN USED)

COMBUSTIBLE

FLOORING

A96285

Fig. 12 -- Furnace, Plenum, a nd Subbase installed on a

Combustible Floor

APPROVED

COIL ASSEMBLY

COIL BOX

FURNACE

SHEET METAL

PLENUM

FLOOR

OPENING

COMBUSTIBLE

FLOORING

A08556

Fig. 13 -- Furnace, Plenum, and Coil Assembly or Coil Box

Installed on a Combustible Floor

58CT

1 2 ... 7 8 9 10 11 12 13 14 15 16 17 ... 55 56

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Carrier 58CTA/CTX User Manual Page 12

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