Carrier 58PHA/PHX Opening Dimensions In. mm, Suspended Furnace Support, Platform Furnace Support

Table 4 – Opening Dimensions - In. (mm)

FURNACE		PLENUM OPENING		FLOOR OPENING
CASING	APPLICATION
WIDTH		A	B	C	D
	Upflow Applications on Combustible or Noncombustible Floor-	12--- 11/16	21--- 5/8	13--- 5/16	22--- 1/4
	ing (KGASB subbase not required)	(322)	(549)	(338)	(565)
	Downflow Applications on Noncombustible Flooring (KGASB	12--- 9/16	19	13--- 3/16	19--- 5/8
14–3/16	subbase not required)	(319)	(483)	(335)	(498)
	Downflow applications on combustible flooring (KGASB sub-	11--- 13/16	19	13--- 7/16	20--- 5/8
(360)
	base required)	(284)	(483)	(341)	(600)
	Downflow Applications on Combustible Flooring with CNPV,	12--- 5/16	19	13--- 5/16	20
	CNRV, CAR, or CAP Coil Assembly or KCAKC coil box
		(313)	(483)	(338)	(508)
	(KGASB subbase not required)
	Upflow Applications on Combustible or Noncombustible Floor-	16	21--- 5/8	16--- 5/8	22--- 1/4
	ing (KGASB subbase not required)	(406)	(549)	(422)	(565)
	Downflow Applications on Noncombustible Flooring (KGASB	15--- 7/8	19	16--- 1/2	19--- 5/8
17–1/2	subbase not required)	(403)	(483)	(419)	(498)
	Downflow applications on combustible flooring (KGASB sub-	15--- 1/8	19	16--- 3/4	20--- 5/8
(445)
	base required)	(384)	(483)	(425)	(600)
	Downflow Applications on Combustible Flooring with CNPV,	15--- 1/2	19	16--- 1/2	20
	CNRV, CAR, or CAP Coil Assembly or KCAKC coil box
		(394)	(483)	(419)	(508)
	(KGASB subbase not required)
	Upflow Applications on Combustible or Noncombustible Floor-	19--- 1/2	21--- 5/8	20--- 1/8	22--- 1/4
	ing (KGASB subbase not required)	(495)	(549)	(511)	(565)
	Downflow Applications on Noncombustible Flooring (KGASB	19--- 3/8	19	20	19--- 5/8
21	subbase not required)	(492)	(483)	(508)	(498)
	Downflow applications on combustible flooring (KGASB sub-	18--- 5/8	19	20--- 1/4	20--- 5/8
(533)
	base required)	(473)	(483)	(514)	(600)
	Downflow Applications on Combustible Flooring with CNPV,	19	19	20	20
	CNRV, CAR, or CAP Coil Assembly or KCAKC coil box
		(483)	(483)	(508)	(508)
	(KGASB subbase not required)
	Upflow Applications on Combustible or Noncombustible Floor-	23	21--- 1/8	23--- 5/8	22--- 1/4
	ing (KGASB subbase not required)	(584)	(537)	(600)	(565)
	Downflow Applications on Noncombustible Flooring (KGASB	22--- 7/8	19	23--- 1/2	19--- 5/8
24--- 1/2	subbase not required)	(581)	(483)	(597)	(498)
	Downflow applications on Combustible flooring (KGASB sub-	22--- 1/8	19	23--- 3/4	20--- 5/8
(622)
	base required)	(562)	(483)	(603)	(600)
	Downflow Applications on Combustible Flooring with CNPV,	22--- 1/2	19	23--- 1/2	20
	CNRV, CAR, or CAP Coil Assembly or KCAKC coil box
		(572)	(483)	(597)	(508)
	(KGASB subbase not required)

58PHA

HORIZONTAL INSTALLATION

!WARNING

FIRE, EXPLOSION, AND CARBON MONOXIDE POISONING HAZARD

Failure to follow this warning could result in personal injury, death, and/or property damage.

Do not install the furnace on its back or hang furnace with control compartment facing downward. Safety control operation will be adversely affected. Never connect return-air ducts to the back of the furnace.

The furnace can be installed horizontally in an attic or crawl space on either the left-hand (LH) or right-hand (RH) side. The furnace can be hung from floor joists, rafters or trusses or installed on a non-combustible platform, blocks, bricks or pad.

Suspended Furnace Support

The furnace may be supported under each end with threaded rod, angle iron or metal plumber’s strap as shown. (See Fig. 15 and 16.) Secure angle iron to bottom of furnace as shown. Heavy-gauge sheet metal straps (plumber’s straps) may be used to suspend the furnace from each bottom corner. To prevent screws from pulling out, use 2 #8 x 3/4-in. (19 mm) screws into the side and 2 #8 x 3/4-in. (19 mm) screws in the bottom of the furnace casing for each strap. (See Fig. 15 and 16.) If the screws are attached to ONLY the furnace sides and not the bottom, the straps must be vertical against the furnace sides and not pull away

from the furnace sides, so that the strap attachment screws are not in tension (are loaded in shear) for reliable support.

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 noncombustible blocks, bricks or angle iron. For crawl space 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 Protection

Provide a minimum 17-3/4 in. x 22 in. (451 mm 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 two screws holding bottom filler panel. (See Fig. 9.)

2.Rotate bottom filler panel downward to release holding tabs.

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