Carrier 58PHA/PHX Electrical Operation Hazard, Personal Injury AND/OR Property Damage Hazard

SMasonry acid washing materials

All fuel-burning equipment must be supplied with air for fuel combustion. Sufficient air must be provided to avoid negative pressure in the equipment room or space. A positive seal must be made between the furnace cabinet and the return-air duct to prevent pulling air from the burner area and from draft safeguard opening.

18-IN. (457.2 mm)

MINIMUM TO BURNERS

A93044

Fig. 5 - Installation in a Garage

!WARNING

ELECTRICAL OPERATION HAZARD

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

When the furnace is installed in a residential garage, the burners and ignition sources must be located at least 18 inches above the floor. The furnace must be located or protected to avoid damage by vehicles. When the furnace is installed in a public garage, airplane hangar, or other building having a hazardous atmosphere, the furnace must be installed in accordance with the NFGC or CAN/CSA-B149.1-05. (See Fig. 5).

!CAUTION

PERSONAL INJURY AND/OR PROPERTY DAMAGE HAZARD

Improper use or installation of this furnace may cause premature furnace component failure.

This gas furnace may be used for heating buildings under construction provided that:

-The furnace is permanently installed with all electrical wiring, piping, venting and ducting installed according to these installation instructions. A return air duct is provided, sealed to the furnace casing, and terminated outside the space containing the furnace. This prevents a negative pressure condition as created by the circulating air blower, causing a flame rollout and/or drawing combustion products into the structure.

-The furnace is controlled by a thermostat. It may not be “hot wired” to provide heat continuously to the structure without thermostatic control.

-Clean outside air is provided for combustion. This is to minimize the corrosive effects of adhesives, sealers and other construction materials. It also prevents the entrainment of drywall dust into combustion air, which can cause fouling and plugging of furnace components.

-The temperature of the return air to the furnace is maintained between 55_F (13_C) and 80_F (27_C), with no evening setback or shutdown. The use of the furnace while the structure is under construction is deemed to be intermittent operation per our installation instructions.

-The air temperature rise is within the rated rise range on the furnace rating plate, and the gas input rate has been set to the nameplate value.

-The filters used to clean the circulating air during the construction process must be either changed or thoroughly cleaned prior to occupancy.

-The furnace, ductwork and filters are cleaned as necessary to remove drywall dust and construction debris from all HVAC system components after construction is completed.

-Verify proper furnace operating conditions including ignition, gas input rate, air temperature rise, and venting according to these installation instructions.

58PHA

Table 2 – Minimum Free Area Required for Each Combustion Air Opening or Duct to Outdoors

	TWO HORIZONTAL DUCTS			SINGLE DUCT OR OPENING		TWO OPENINGS OR VERTICAL
						DUCTS
FUR-		(1 SQ. IN./2,000 BTUH)		(1 SQ. IN./3,000 BTUH)
						(1 SQ. IN./4,000 BTUH)
NACE		(1,100 SQ. MM/KW)		(734 SQ. MM/KW)		(550 SQ. MM/KW)
INPUT
	Free Area of Opening		Round Duct	Free Area of Open-	Round Duct	Free Area of	Round Duct
(BTUH)
	and Duct		Diameter	ing and Duct	Diameter	Opening and Duct	Diameter
	(sq. in. / sq. mm)		(in./mm)	(sq. In. / sq. mm)	(in. / mm)	(sq. In. / sq. mm)	(In./mm)
44,000	22	(14193)	6 (152)	14.7 (9484)	5 (127)	11 (7097)	4 (102)
66,000	33	(21290)	7 (178)	22 (14193)	6 (152)	16.5 (10645)	5 (127)
88,000	44	(28387)	8 (203)	29.3 (18903)	7 (178)	22 (14193)	6 (152)
110,000	55	(35484)	9 (229)	36.7 (23677)	7 (178)	27.5 (17742)	6 (152)
132,000	66	(42581)	10 (254)	44 (28387)	8 (203)	33 (21290)	7 (178)

EXAMPLES: Determining Free Area

FURNACE		WATER HEATER		TOTAL INPUT
110,000	+	30,000	= (140,000 divided by 4,000)		=	35.0	Sq. In. for each two Vertical Ducts or Openings
66,000	+	40,000	=	(106,000 divided by 3,000)	=	35.3	Sq. In. for a Single Duct or Opening
88,000	+	30,000	=	(118,000 divided by 2,000)	=	59.0	Sq. In. for each of two Horizontal Ducts

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