Whirlpool WGGE43 Instruction Manual download pdf (Page 7)

NOTES:

■ LPT-00A may be used on models with AA revisions.

■ LPT-03 is compatible with both the White Rodgers and the

Honeywell gas control valves.

NOTE: Inlet gas pressure must not exceed the maximum value

shown in the Inlet Gas Pressure chart.

The minimum supply pressure should not vary from that shown in

the Inlet Gas Pressure chart, because this could prevent the unit

from having dependable ignition. In addition, gas input to the

burners must not exceed the rated input shown on the rating

plate. Overfiring of the unit could result in premature heat

exchanger failure.

High Altitude Derate—U.S. Installations Only

IMPORTANT: The gas/electric units naturally derate with

altitude. Do not attempt to increase the firing rate by changing

orifices or increasing the manifold pressure. This can cause poor

combustion and equipment failure. At all altitudes, the manifold

pressure must be within 0.3" W.C. of that listed on the nameplate

for the fuel used. At all altitudes and with either fuel, the air

temperature rise must be within the range listed on the unit

nameplate.

Refer to the installation manual provided with the LP kit for

conversion from Natural gas to propane gas and for altitude

adjustments.

NOTE: Up to 7,000 ft (2,134 m), no changes are required; above

7,000 ft (2,134 m), refer to High Altitude Kit HA-02.

IMPORTANT NOTE: To avoid possible unsatisfactory operation

or equipment damage due to under firing of equipment, do not

undersize the Natural/propane gas piping from the meter/tank to

the unit. When sizing a trunk line, include all appliances on that

line that could be operated simultaneously.

The rating plate is stamped with the model number, type of gas

and gas input rating. Make sure that the unit is equipped to

operate on the type of gas available. The gas line installation

must comply with local codes, or in the absence of local codes,

with the latest edition of the National Fuel Gas Code NFPA 54/

ANSI Z223.1.

Pressure = 0.50 psig or less and pressure drop of 0.3" W.C.

(Based on 0.60 specific gravity gas)

Refer to the “Proper Piping Practice” illustration for the general

layout at the unit. The following rules apply:

1. Use black iron pipe and fittings for the supply piping. The use

of a flex connector and/or copper piping is permitted as long

as it is in agreement with local codes.

2. Use pipe joint compound on male threads only. Pipe joint

compound must be resistant to the action of the fuel used.

3. Use ground joint unions.

4. Install a drip leg to trap dirt and moisture before it can enter

the gas control valve. The drip leg must be a minimum of 3"

(7.6 cm) long.

5. Use 2 pipe wrenches when making the connection to the gas

control valve to keep the valve from turning.

6. Install a manual shutoff valve in a convenient location (within

6 ft [1.8 m] of the unit) between the meter and the unit.

7. Tighten all joints securely.

8. The unit must be connected to the building piping by one of

the following methods:

■ Rigid metallic pipe and fittings

■ Semirigid metallic tubing and metallic fittings (aluminum

alloy tubing must not be used in exterior locations)

■ Listed gas appliance connectors used in accordance with

the terms of their listing that are completely in the same

room as the equipment

■ The connector or tubing must be protected against

physical and thermal damage. Aluminum alloy tubing and

connectors must be coated to avoid external corrosion

when in contact with masonry, plaster or insulation or are

subject to repeated wettings by liquids (water—not

rainwater, detergents or sewage).

Proper Piping Practice

NOTE: The unit gas supply entrance is factory sealed with plugs.

Keep plugs in place until gas supply is ready to be installed. Once

ready, replace the plugs with the supplied grommets and install

gas supply line.

Inlet Gas Pressure

Natural Minimum: 5.0" W.C. Maximum: 10.0" W.C.

Propane Minimum: 11.0" W.C. Maximum: 13.0" W.C.

Natural Gas Connection

Natural Gas Capacity of Pipe in Cu Ft (m

) of Gas Per Hour

(CFH)

Length of

Pipe—ft (m)

Nominal Black Pipe Size

¹⁄₂" ³⁄₄"1" 1¹⁄₄"1¹⁄₂"

10 (3) 132 278 520 1,050 1,600

20 (6.1) 92 190 350 730 1,100

30 (9.2) 73 152 285 590 980

40 (12.2) 63 130 245 500 760

50 (15.2) 56 115 215 440 670

60 (18.3) 50 105 195 400 610

70 (21.3) 46 96 180 370 560

80 (24.4) 43 90 170 350 530

90 (27.4) 40 84 160 320 490

100 (30.5) 38 79 150 305 460

CFH =

Btu/h Unit Input

Heating Value of Gas (Btu/Cu Ft)

A. Manual shutoff valve

B. Drip leg

C. Ground joint union (installed upstream of

gas control valve)

D. Grommet

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Whirlpool WGGE43 Instruction Manual Page 7

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