Fuel Piping - Nordyne M1GH 056 Installation Instructions And Owner's Manuals

UPPER ROOF
JACK (CROWN)
WEATHER CAP
FLASHING
OUTER PIPE
INNER FLUE
PIPE
FLUE ASSEMBLY
Figure 24.
Power supply circuit to the furnace must be installed and
grounded in accordance with the National Electrical code
(ANSI-C1/NFPA-70), or Canadian Electric Code Part 1 (CSA
22-1) and all local codes having jurisdiction.
CONNECT POWER SUPPLY WIRES
a. Remove the furnace control panel cover.
b. Insert 115 volt wires through the strain relief on the left
side of the furnace control box (see Figure 25).
c. Connect the "hot" wire to the BLACK pigtail lead, and
the "neutral" wire to the WHITE pigtail lead. Secure all
connections with suitable wire nuts.
d. Connect the "ground" wire to the grounding screw.
e. Reinstall the control panel cover and secure with the
original mounting screws.
CONNECT THERMOSTAT WIRES
a. Insert 24 volt wires through the plastic grommet just
above the control panel.
b. Connect the thermostat wires to the furnace low voltage
pigtails (see Figure 25).
c. Connect low-voltage circuit to the wall thermostat.
d. A hole may be made in the furnace cabinet to ease
thermostat wiring. Make sure that the wiring is protected
from the sharp edge of the added hole.
NOTE: The thermostat should be installed 4 to 5 feet above
the floor on an inside wall which is relatively free from direct
sources of heat or cold drafts. The nominal anticipator setting
is 0.4. (Refer to the thermostat literature for additional
information.)
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).
Once the furnace is installed check the thermostat 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.
12
SCREWS
COMPLETED
ASSEMBLY
TO FURNACE
On-Off
Switch
Blower
Plug
Power
Entry
On-Auto
Switch
(Heating
Models Only)
Figure 25. Control Panel (All Models)
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 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 installations 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).
T'STAT
Recommended T'STAT Wire
Wire Gauge
(Heating)
24
22
20
18
Table 8. Thermostat Wire Gauge
Thermostat Wires
Furnace
Control Box
To Combustion
Blower or
Flame Roll-Out
Switch
To Gas Valve
or Burner
Length (Unit to T'STAT)
2-Wire 5-Wire
(Heating/Cooling)
55 25
90 45
140 70
225 110