Whirlpool WGFD293 Instruction Manual download pdf (Page 10)

PROPANE GAS/HIGH ALTITUDE INSTALLATIONS

This furnace is shipped from the factory configured for Natural

gas at standard altitude. Propane gas installations require an

orifice change to compensate for the energy content difference

between Natural and propane gas.

High altitude installations may require both a pressure switch and

an orifice/spring change. These changes are necessary to

compensate for the natural reduction in the density of both the

gas fuel and the combustion air at higher altitude.

For installations above 7,000 ft (2,133.6 m), refer to your

distributor for required kit(s).

Contact the distributor for a tabular listing of appropriate

manufacturer’s kits for propane gas and/or high altitude

installations. The indicated kits must be used to insure proper

furnace operation. All conversions must be performed by a

qualified installer or service agency.

VENT/FLUE PIPE AND COMBUSTION AIR PIPE

A condensing gas furnace achieves its high level of efficiency by

extracting almost all of the heat from the products of combustion

and cooling them to the point where condensation takes place.

Because of the relatively low flue gas temperature and water

condensation requirements, PVC pipe is used as venting material.

NOTES:

■ This furnace must not be connected to Type B, BW, or L vent

or vent connector, and must not be vented into any portion of

a factory-built or masonry chimney except when used as a

pathway for PVC as described later in this section.

■ Do not common vent this appliance with another appliance or

use a vent which is used by a solid fuel appliance.

■ Do not use commercially available “no hub connectors” other

than those shipped with this product.

It is the responsibility of the installer to follow the manufacturers’

recommendations and to verify that all vent/flue piping and

connectors are compatible with furnace flue products.

Additionally, it is the responsibility of the installer to ensure that all

piping and connections possess adequate structural integrity and

support to avoid flue pipe separation, shifting or sagging during

furnace operation.

Dual Certification: Nondirect/Direct Vent

This furnace is dual certified and may be installed as a nondirect

vent (single pipe) or direct vent (dual pipe) appliance. A nondirect

vent installation requires only a vent/flue pipe, while a direct vent

installation requires both a vent/flue pipe and a combustion air

intake pipe. Refer to the appropriate section for details

concerning piping size, length, number of elbows, furnace

connections and terminations.

2" or 3" (5.1 cm or 7.6 cm) nominal diameter PVC Schedule

40 pipe meeting ASTM D1785, PVC primer meeting ASTM F656

and PVC solvent cement meeting ASTM D2564 specifications

must be used. Fittings must be DWV type fittings meeting ASTM

D2665 and ASTM D3311. Carefully follow the pipe

manufacturer’s instructions for cutting, cleaning and solvent

cementing of PVC.

The use of Schedule 40 PVC Cellular Core (Foam Core) plastic

pipe is also acceptable as a flue/vent and intake pipe material.

PVC primer meeting ASTM F656 and PVC solvent cement

meeting ASTM D2564 specifications must be used. Fittings must

be DWV type fittings meeting ASTM D2665 and ASTM D3311.

Carefully follow the manufactures instructions for cutting,

cleaning and solvent cementing of PVC.

Possible property damage, personal injury or death may

occur if the correct conversion kits are not installed. The

appropriate kits must be applied to ensure safe and proper

furnace operation. All conversions must be performed by

a qualified installer or service agency.

WARNING

Gas Altitude Kit Orifice

Manifold

Pressure

Switch

Change

High

Stage

Low

Stage

Natural

0 to

7,000 ft

(2,133.6 m)

None #43 3.5"

W.C.

1.9"

W.C.

None

Propane LPM-

#55 10.0"

W.C.

6.0"

W.C.

None

NOTE: In Canada, gas furnaces are only certified to 4,500 ft

(1,371.6 m).

Failure to follow these instructions can result in bodily

injury or death. Carefully read and follow all instructions

given in this section.

WARNING

Upon completion of the furnace installation, carefully

inspect the entire flue system both inside and outside of

the furnace to assure it is properly sealed. Leaks in the

flue system can result in serious personal injury or death

due to exposure to flue products, including carbon

monoxide.

WARNING

To avoid bodily injury, fire or explosion, solvent cements

must be kept away from all ignition sources (for example,

sparks, open flames and excessive heat) as they are

combustible liquids. Avoid breathing cement vapors or

contact with skin and/or eyes.

WARNING

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Whirlpool WGFD293 Instruction Manual Page 10

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