Whirlpool WGFD293 Instruction Manual download pdf (Page 28)

■ Install a ¹⁄₈" NPT pipe plug fitting, accessible for test gage

connection, immediately upstream of the gas supply

connection to the furnace.

■ Always use a backup wrench when making the connection to

the gas control valve to keep it from turning.

NOTE: The orientation of the gas control valve on the

manifold must be maintained as shipped from the factory.

■ Maximum torque for the gas control valve connection is

375 in-lbs.

NOTE: Excessive overtightening may damage the gas control

valve.

■ Install a manual shutoff valve between the gas meter and the

furnace within 6 ft (1.8 m) of the furnace.

■ If a union is installed, the union must be downstream of the

manual shutoff valve, between the shutoff valve and the

furnace.

■ Tighten all joints securely.

■ Connect the furnace to the building piping by one of the

following methods:

1. Rigid metallic pipe and fittings.

2. Semirigid metallic tubing and metallic fittings.

NOTE: Aluminum alloy tubing must not be used in exterior

locations. In order to seal the grommet cabinet penetration,

rigid pipe must be used to reach the outside of the cabinet. A

semirigid connector to the gas piping may be used from

there.

■ Use listed gas appliance connectors in accordance with their

instructions.

■ Gas connectors must be fully in the same room as the

furnace.

■ Protect gas connectors and semirigid tubing against physical

and thermal damage when installed.

■ Ensure aluminum alloy tubing and connectors are coated to

protect against external corrosion when in contact with

masonry, plaster, insulation or subjected to repeated wetting

by liquids such as water (except rain water), detergents or

sewage.

Gas Piping Connections—Upflow

Gas Piping Connections—Counterflow

Gas Piping Connections—Horizontal Upflow

A. Alternate gas line location

B. Manifold

C. Gas control valve

D. Burners

E. Manual shutoff valve (upstream

from ground joint pipe union)

F. Height required by local codes

G. Drip leg

H. Grommet in standard gas line hole

I. Ground joint pipe union

J. Plug in alternate gas line hole

BC D

A. Manual shutoff valve (upstream

from ground joint pipe union)

B. Alternate gas line location

C. Plug in alternate gas line hole

D. Gas control valve

E. Manifold

F. Bu rn ers

G. Ground joint pipe union

H. Grommet in standard gas line hole

I. Drip leg

J. Height required by local codes

A. Gas control valve

B. Ground joint pipe union

C. Manual shutoff valve (upstream

from ground joint pipe union)

D. Drip leg

E. Grommet in standard gas line hole

F. Dra i n trap

G. Plug in alternate gas line hole

H. Alternate gas line location

I. Manifold

J. Burners

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Whirlpool WGFD293 Instruction Manual Page 28

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