Nordyne M1G, M1B, M1S Fuel Piping, For Platinum-ready Construction a. Use a heat/cool thermostat

cold drafts. The nominal anticipator setting is

0.4.(Refer to the thermostat literature for addi- tional information.)

Five-conductor thermostat wire is recom- mended for 24 volt low-voltage circuit (2-wire is required for furnace only; 5-wire for heating and optional cooling systems).

For Platinum-ready Construction: a. Use a heat/cool thermostat.

b. Run thermostat wire from the Thermostat to the Furnace (see Figure 39).

c. Using thermostat wire with at least two wires (four wire is recommended), run thermostat wire from the Furnace to the intended loca- tion of the Platinum-series unit. Leave at least six feet of extra thermostat wire at the in- tended location for future hook-up. Coil re- maining six feet of wire and attach to the home’s undercarriage.

Once the furnace is installed check the thermo- stat anticipator against the nominal setting of 0.4:

1.Connect the milliamp meter in series with one of the gas valve’s low voltage terminals.

2.Energize the gas valve.

3.Read the value of the milliamps.

4.Adjust the heat anticipator of the thermostat to the value read on the milliamp meter.

If the heat anticipator is set too high, the furnace may delay in coming on.

If the heat anticipator is set too low, the furnace may cycle frequently and not provide comfort to the homeowner.

14. FUEL PIPING

Sizing and installation of fuel lines must be in accordance with federal, state and local regu- lations. All piping shall be black iron pipe, or equivalently sized steel tubing. Internally tinned copper tubing may be used for gas supply systems.

Fuel line installations other than typical installa- tions shown in Figures 26 and 27 must comply with the fuel piping provisions stated in the Federal Manufactured Home Standard (H.U.D. TITLE 24, PART 280) and the National Fuel Gas Code (ANSI-Z223.1/NFPA-54).

a.Optional fuel inlet lines are available for all gas furnace models to permit the addition of a 1/ 2" F.P.T. shut-off valve above the floor.

NOTE: Shut-off valve must be designed and listed for use with liquid petroleum (L.P. gas).

The gas supply to your home will either be Natural Gas or L.P. (bottle gas). Your furnace is factory equipped to operate on Natural Gas. If your gas supply is L.P. (bottle gas), you must contact a qualified serviceman or gas supplier to convert the furnace. The necessary instruc- tions for the gas conversion are found on the lighting instruction label attached to the furnace in Section 16, Service Guide.

On-Off

Switch

Blower

Plug

Power

Entry

On-Auto Switch (Heating Models Only)

Thermostat Wires

Furnace

Control Box

To Combustion

Blower or

Flame Roll-Out

Switch

To Gas Valve or Burner

Figure 25. Control Panel (All Models)

16