Nordyne G6RC 90+, G6RL 90+, G6RD 93+ START-UP and Adjustments, Low Voltage Wiring, Above Sea Level

Furnace Rating	Orifice Drill Size
Plate Input (Btu/h)	Nat	LP
45000	44	54
60000	45	55
72000	43	54
96000	43	54
120000	43	54
144000	43	54

Table 9. Natural and LP Gas Orifice Sizes

for Elevations between zero and

4999 ft. Above Sea Level

used in this furnace require an earth ground to operate properly. Acceptable methods for grounding are electrical wire or conduit ap- proved for electrical ground service. Do not use gas piping as an electrical ground.

NOTE: Proper line voltage polarity must be maintained in order for the control system to operate correctly. Verify that the incoming neutral line is connected to the white wire and the incoming "hot" line is connected to the black wire in the furnace junction box. These furnaces will not operate unless po- larity and ground are properly connected. See Figure 23.

!CAUTION:

Label all wires prior to disconnection when servicing controls. Wiring er- rors can cause improper and danger- ous operation. Verify proper opera- tion after servicing.

Furnace Rating	Orifice Drill Size
Plate Input (Btu/h)	Nat	LP
45000	44	55
60000	45	56
72000	43	55
96000	43	55
120000	43	55
144000	43	55

Table 10. Natural and LP gas Orifice Sizes for Elevations between 5000 and 10,000 ft.

Above Sea Level

nace. See Figure 24 for the proper connections for heating only (two-wire) and heating/cooling (four-wire) applications. The recommended minimum wire gauge for thermostat wiring is shown in Table 11.

The thermostat must not be installed on an outside wall or any other location where its opera- tion may be adversely affected. Adverse affects include radiant loading from fireplaces, sunlight, or lighting fixtures, and convective loading from warm air registers or electrical appliances.

To check the heat anticipator setting either:

1.Add the current draw of the system compo- nents; or

2.Measure the current flow on the thermostat R-W circuit after the circulating blower mo- tor has started.

Set the heat anticipator according to the thermo- stat manufacturer's instructions for heat antici- pator settings.

START-UP AND ADJUSTMENTS

Low Voltage Wiring

Install the thermostat per the manufacturer's instructions. The low voltage (24 volt) connec- tions from the thermostat are made at the terminal strip on the control board in the fur-

Prior to start-up, verify that:

1.The line voltage power leads are securely connected, that the polarity of the connec- tions is correct, and that the furnace is properly grounded.

Field Supplied	Field Supplied
Fused Service
	Panel Connector
Panel
Black (Hot)	Black	Black	Black
White (Neutral)	White	White	White
Green or Bare
(Ground)		Ground	Ground
Ground

Field Supplied Disconnect

Within Sight of Furnace

Field Line Voltage Wiring

Factory Line Voltage Wiring

Figure 23. Line Voltage Field Wiring

25