Nordyne M1GH 056 Installation Instructions And Owner's Manuals page 13

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 instructions 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 to 3-1/2" W.C. by the
pressure regulator in the gas valve. The maximum inlet
pressure for the valve is 13" W.C.
For L.P. gas, pressure to the gas valve must be more than 11"
W.C. but not more than 13" W.C. Pressure is reduced to 10"
W.C. by the pressure regulator in the gas valve.
!
CAUTION:
The furnace must be converted by a qualified
technician. Improper conversion can cause
unsafe operation, explosion, fire and/or
asphyxiation.
Oil Tank and Piping Installation
The following procedures are recommended as good practice.
However, requirements of local codes and ordinances, H.U.D.
Manufactured Home and Safety Standards or National Fire
Protection Association must be satisfied, where they apply,
for an approved installation.
Use a tank capacity suitable for the application with a
weatherproof, capped fill opening and a shielded vent to let in
air as fuel is used. The tank must be clean inside before filling.
All water, rust, sediment and other foreign matter must be
flushed out.
3/8" Oil Supply Line
Vent with
Cap
Gauge
Guide pipe
Note: Additional venting
may be required if tank
is filled rapidly.
End of Oil Supply Line
3" to 5" Above
Bottom Drain
2" Duplex
Bushing
Top of Tank
2" Fill
Shut-off
Valve
8 ft.
Alternate
Drain
Fuel Line
Optional
Entry
Fuel
Filter
Figure 27. Typical Oil Piping for Above Ground (Single-Line) Supply
On-Off-Fan
Switch
Control
Panel
To Gas
Supply
Figure 26. Typical Gas Piping
A fuel or tank gauge is recommended for easy checking of the
fuel level. Check the gauge reading with a dipstick.
Locate the storage tank conveniently near the home. For
above ground fuel tank installations, the tank may rest three
to four inches off the ground. Fuel tanks may also be buried
if properly coated to resist corrosion. For below ground fuel
tank installations, the vertical dimension from the bottom of
the fuel tank to the fuel pump must not exceed ten feet. Keep
the tank filled, especially in the summer to reduce the
accumulation of condensation.
Oil Flue Gas
Furnace Sampling
Hole
On-Off-Fan
Switch
Control
Panel
Floor
Floor Cavity
Alt. Fuel
Line Entry
Pressure
Gauge Port
Optional
Nozzle
Return
Port
R
Optional
Return Port &
Inlet
Internal By-Pass
Oil-Gun
Burner
If fuel pump fails to lift oil, check for air
leaks and tighten all fuel fittings. Re-
prime fuel pump by injecting fuel oil into
optional (top) return port. Replace return
port plug and repeat priming procedure.
Inlet
Port
Air-Bleed
Valve
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