Carrier 58PHA/PHX instruction manual Leveling Legs, Downflow Installation

5/16″

(8mm)

(8mm)

5/16″

1 3/4″ (44mm)

1 3/4″ (44mm)

(8mm)

5/16″

(8mm)

5/16″

(44mm) 1 3/4″ (44mm)1 3/4″

A89014

Fig. 10 - Leveling Legs

4.Adjust outside nut to provide desired height, and tighten inside nut to secure arrangement.

5.Reinstall bottom closure panel if removed.

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:

SSpecial Base, KGASB

SCased Coil Assembly Part No. CNPV, CNRV, CAP, or

CAR

SCoil Box Part No. KCAKC

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, KGASB is used, install as shown in Fig. 12. If Coil Assembly Part No. CNPV, CNRV, CAP and CNR or Coil Box PartNo. KCAKC is used, install as shown in Fig. 13.

NOTE: It is recommended 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. 14.)

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 two 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

	A
	PLENUM
	OPENING
B	D
	FLOOR
	OPENING
	C

58PHA

A96283

Fig. 11 - Floor and Plenum Opening Dimensions

FURNACE

(OR COIL CASING

WHEN USED)

COMBUSTIBLE

FLOORING

DOWNFLOW

SUBBASE

SHEET METAL

PLENUM

FLOOR

OPENING

A96285

Fig. 12 - Furnace, Plenum, and Subbase Installed on a Combustible Floor

11