OWNER’S MANUAL

INSTALLATION

(Continued)

CONNECTING TO

ATTACHING CABINET

ELECTRICAL SUPPLY

FRONT COVER

Test Pressures Equal To or Less Than 1/2 PSIG (3.5 kPa)

1.Close equipment shutoff valve (see Fig- ure 16).

2.Pressurize supply piping system by either using compressed air or opening main gas valve located on or near gas meter.

3.Check all joints from gas meter to equipment shutoff valve. Apply mix- ture of liquid soap and water to gas joints. Bubbles forming show a leak.

4.Correct all leaks at once.

Pressure Testing Furnace Gas Connections

1.Open equipment shutoff valve (see Fig- ure 16).

2.Open main gas valve located on or near gas meter.

3.Make sure control knob of furnace is in the OFF position.

4.Check all joints from equipment shutoff valve to gas inlet pipe. Apply mixture of liquid soap and water to gas joints. Bubbles forming show a leak.

5.Correct all leaks at once.

6.Turn on furnace (see Operating Fur- nace, pages 12 and 13). Check the rest of the internal joints for leaks.

7.Turn off furnace (see To Turn Off Gas to Furnace, page 13).

On Position

Off Position

Figure 16 - Equipment Shutoff Valve

IMPORTANT: Follow all local codes when connecting electricity to furnace. In the ab- sence of local codes, refer to the latest edi- tion of the National Electrical Code ANS/ NFPA No. 70. If you are not familiar with wiring codes, have a qualified electrician do the wiring.

It is best to plug furnace into a separate and permanent electrical line circuit.

1.Supply a 120-volt, 60-cycle, grounded outlet at furnace location.

2.The furnace has a three-pronged (grounded) plug. Use only a grounded, three-prong outlet.

IMPORTANT: Some local codes require rigid or semi-rigid conduit or metallic sheathe cable. When using a semi-rigid or metallic sheathe cable, the installer must terminate the supply wire in the terminal box opening.

Performance Check

Plug furnace into three-pronged outlet. If ignitor remains on after main burner igni- tion or if the valve chatters, you may have reversed polarity.

1.Unplug furnace.

2.Turn off electricity to outlet.

3.Reverse 120-volt connections inside outlet.

4.Turn on electricity to outlet.

5.Plug in furnace. Ignitor should turn off after main burner ignites. If ignitor does not turn off, or if valve continues to chatter, turn off furnace and unplug. Call a qualified service person.

CAUTION: Do not operate fur- nace with front cover removed or mounted wrong. If front cover is mounted wrong, you cannot se- cure it to cabinet with screws.

1.Hook top of front cover over top cabi- net flange.

2.Secure the sides of front cover to lower sides of furnace cabinet with two screws provided (see Figure 17).

IMPORTANT: You may have removed fur- nace from furnace cabinet during installa- tion. You must correctly install furnace within cabinet. If not, front cover will not properly attach to cabinet. Make sure gas- kets for intake and exhaust tubes are in place. Make sure intake and exhaust tubes extend into vent caps on cabinet back and are secured with screws. Make sure you secured flange on bottom of furnace to flange on bottom front of cabinet.

Figure 17 - Attaching Front Cover to Cabinet

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Williams 4003532, 2503532 installation manual Pressure Testing Furnace Gas Connections, Performance Check
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