Carrier 58HDV Knock Outs, Outdoor Combustion Air Method, Air Openings and Connecting Ducts

58HDV

If the furnace is to be suspended from the floor joists in a crawl space or the rafters in an attic, it is necessary to use steel pipe straps or an angle iron frame to rigidly attach the furnace to prevent movement. These straps should be attached to the furnace bottom side with sheet metal screws and to the rafters or joists with bolts. The preferred method is to use an angle iron frame bolted to the rafters or joists.

If the furnace is to be installed in a crawl space, consult local codes. A suitable concrete pad or blocks are recommended for crawl space installation on the ground.

NOTE: 6″ (152.4mm) bottom clearance required for condensate trap.

24″ (609.6mm) inches between the front of the furnace and adjacent construction or other appliances MUST be maintained for service clearance. [30″ (762mm) inches is required to remove furnace].

Keep all insulating materials clear from louvered door. Insulating materials may be combustible.

The horizontal furnaces may be installed directly on combustible wood flooring or supports as long as all required furnace clearances are met. See Fig. 3.

This furnace MUST NOT be installed directly on carpeting or tile or other combustible material other than wood flooring or supports.

For horizontal installation over a finished living space. A field fabricated auxiliary drain pan with drain pipe is required to prevent damage by overflow due to blocked condensate drain.

Knock Outs

A07702

Fig. 5 - Hammer and Screwdriver used for Knockout

!CAUTION

CUT HAZARD

Failure to follow this caution may result in personal injury.

Sheet metal parts may have sharp edges or burrs. Use care and wear appropriate clothing, safety glasses and gloves when handling parts and servicing furnaces.

Use a hammer and screwdriver to strike a sharp blow (See Fig. 5) directly to the knockout tie points or use a hammer in the upper left corner of the desired knockout. Remove any burrs and sharp edges.

NOTE: If a knockout does not come out after two sharp blows, pull and snip as needed to remove the knockout.

COMBUSTION & VENTILATION

AIR

For Single Pipe Installation

!WARNING

CARBON MONOXIDE POISONING HAZARD

Failure to follow this warning could result in personal injury or death.

Use methods described here to provide combustion and ventilation air.

Furnaces require ventilation openings to provide sufficient air for proper combustion and ventilation of flue gases. All duct or openings for supplying combustion and ventilation air must comply with the gas codes, or in the absence of local codes, the applicable national codes.

Combustion and ventilation air must be supplied in accordance with one of the following:

NOTE: The Combustion & Ventilation Air Section in this document, uses tables and information from the ANSI Z223.1/NFPA 54. For use in Canada, use CSA B149.1 for this information.

1.Section 9.3, Air for Combustion and Ventilation, of the Na- tional Fuel Gas Code, (NFGC), ANSI Z223.1-2006/NFPA 54-2006 in the U.S.,

2.Sections 8.2, 8.3, 8.5, 8.6, 8.7, and 8.8 of National Standard of Canada, Natural Gas and Propane Installation Code (NSCNGPIC), CSA B149.1-05 in Canada,

3.Applicable provisions of the local building code.

This furnace can NOT be common vented or connected to any type B, BW or L vent or vent connector, nor to any portion of a factory-built or masonry chimney. Multistory common venting is NOT permitted. If this furnace is replacing a previously common-vented furnace, it may be necessary to resize the existing vent and chimney to prevent oversizing problems for the other remaining appliance(s). See “Venting and Combustion Air Check” in this section. This furnace MUST be vented to the outside.

When the installation is complete, check that all appliances have adequate combustion air and are venting properly. See Venting And Combustion Air Check in “Gas Vent Installation” Section in this manual.

Outdoor Combustion Air Method

A space having less than 50 cubic feet per 1,000 BTUH input rating for all gas appliances installed in the space requires outdoor air for combustion and ventilation.

Air Openings and Connecting Ducts

1.Total input rating for all gas appliances in the space MUST be considered when determining free area of openings.

2.Connect ducts or openings directly to the outdoors.

3.When screens are used to cover openings, the openings MUST be no smaller than 1/4″ (6.35 mm) mesh.

4.The minimum dimension of air ducts MUST NOT be less than 3″ (76.2 mm).

5.When sizing a grille, louver, or screen use the free area of opening. If free area is NOT stamped or marked on grill or louver, assume a 20% free area for wood and 60% for metal. Screens shall have a mesh size not smaller than 1/4″ (6.35

mm).

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