START-UP, ADJUSTMENT, and Safety Check, General

58CT

A04129

Fig. 50 - Knockout Pulled Loose

A04130

Fig. 51 - Hammer and Screwdriver Used for Knockout

A04131

Fig. 52 - Remove Knockout with Hammer

!CAUTION

BURN HAZARD

Failure to follow this caution may cause personal injury.

Hot vent pipe is within reach of small children when installed in downflow position.

See the following instruction.

An accessory Vent Guard Kit, KGAVG0101DFG is REQUIRED for downflow applications for use where the vent exits through the lower portion of the furnace casing door. Refer to the Vent Guard Kit Instructions for complete details.

The horizontal portion of the venting system shall slope upwards not less than 1/4-in. per linear ft. (6 mm/.3 M) from the furnace to the vent and shall be rigidly supported every 5 ft. (1.5 M) or less with metal hangers or straps to ensure there is no movement after installation.

SIDEWALL VENTING

This furnace is not approved for direct sidewall horizontal venting.

In the U.S.: Per section 10.3.4 of the NFPA 54 / ANSI Z223.1-2006, any listed mechanical venter may be used, when approved by the authority having jurisdiction.

In Canada: Per section 8.24.2 of the CAN/CSA-B149.1-05, any listed mechanical venter may be used, when approved by the authority having jurisdiction.

Select the listed mechanical venter to match the Btuh input of the furnace being vented. Follow all manufacturer’s installation requirements for venting and termination included with the listed mechanical venter.

START-UP, ADJUSTMENT, AND SAFETY

CHECK

Step 1 — General

!WARNING

FIRE HAZARD

Failure to follow this warning could result in personal injury, death and/or property damage.

This furnace is equipped with manual reset limit switches in the gas control area. The switches open and shut off power to the gas valve if a flame roll-out or overheating condition occurs in the gas control area. DO NOT bypass the switches. Correct problem before resetting the switches.

1.Maintain 115-v wiring and ground. Improper polarity will result in rapid flashing LED and no furnace operation.

2.Make thermostat wire connections at the 24-v terminal block on the furnace control. Failure to make proper con- nections will result in improper operation. (See Fig. 23.)

3.Gas supply pressure to the furnace must be greater than 4.5-in. wc (0.16 psig ) but not exceed 14-in. wc (0.5 psig).

!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 protective clothing, safety glasses and gloves when handling parts and servicing furnaces.

4.Check all manual-reset switches for continuity.

5.Install blower compartment door. Door must be in place to operate furnace.

6.Setup switch descriptions The 2 stage furnace has DIP switches used to select thermostat staging and blower off delay timings. For switch locations on Furnace control board, See Fig. 33 and 57.

7.Setup switch descriptions - See Table 10.