Fuel Piping - Nordyne M1B Series Owner's Manual & Installation Instructions

Five-conductor thermostat wire is recommended
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 location
of the Platinum-series unit. Leave at least six
feet of extra thermostat wire at the intended
location for future hook-up. Coil remaining six
feet of wire and attach to the home's undercar-
riage.
Once the furnace is installed check the ther-
mostat 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.
On-Off
Switch
Blower
Plug
Power
Entry
On-Auto
Switch
(Heating Mod-
els Only)
16

14. FUEL PIPING

Sizing and installation of fuel lines must be in ac-
cordance with federal, state and local regulations.
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
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 qualifi ed 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.
For natural gas operation, the furnace is designed
for 7" W.C. inlet pressure. Pressure is reduced
Figure 25. Control Panel (All Models)
gas furnace models to permit the addition of
a 1/2" F.P.T. shut-off valve above the fl oor.
Thermostat Wires
Furnace Con-
trol Box
To Combustion
Blower or
Flame Roll-Out
Switch
To Gas Valve
or Burner