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to the mains. Check all joints for leaks with soapy
solution or other material suitable for the purpose.
•
The furnace and its field supplied manual shutoff valve
must be disconnected from the gas supply piping
system during any pressure testing of that system at
test pressures in excess of 1/2 PSIG (3.48kPa).
• A 1/8” N.P.T. plugged tapping, accessible for test
gauge connections, must be installed immediately
upstream of the gas supply connection to the furnace.
Gas Connection
The gas supply line is routed through the gas entry
location on the side of the unit (see Figure 4). A grommet is
provided in the instruction bag and should be used to seal
gas supply line to gas entry of control compartment.
Thermostat
Wire Entry
High Voltage
Power Entry
Gas Entry
Figure 4.
The furnace must be isolated from the gas supply piping
system by closing the field supplied manual shutoff valve
during any pressure testing of gas supply piping system
at test pressures equal to or less than 1/2 psig or 14”
w.c. If the piping system is to be tested at pressures in
excess of 1/2 psig, the furnace and its individual shutoff
valve must be disconnected from the gas supply piping
system.
WARNING
NOTE:
LP/Propane Units, Tanks, and Piping are shipped
equipped for use with natural gas, but can be converted to
LP/propane in the field by an approved licensed technician.
If conversion is required, use the approved conversion kit.
When converting a low NOx unit (designated by an L in
some model numbers) to propane, the NOx inserts must
be removed.
All LP/propane gas equipment must conform to the safety
standards of the National Fire Protection Association.
Electrical Wiring
See Figure 5 and Figure 6
All wiring should be done in accordance with the National
Electrical Code, ANSI/NFPA No. 70 (latest edition);
Canadian Electrical Code Part 1, CSA C22.1 (latest
edition); or local codes where they prevail. Use wiring with
a temperature limitation of 75°C minimum. Run the 208 or
230 volt, 60 hertz electric power supply through a fused
disconnect switch to the control box of the unit and connect
as shown in the wiring diagram located on the inside of the
control access panel.
Power supply to the unit must be N.E.C. Class 1, and must
comply with all applicable codes. A fused disconnect switch
should be field provided for the unit. The switch must be
separate from all other circuits. If any of the wire supplied
with the unit must be replaced, replacement wire must be
of the type shown on the wiring diagram. Electrical wiring
must be sized to carry minimum circuit ampacity marked
on the unit.
For satisfactory operation, LP/propane gas pressure must
be a minimum of 11” w.c. at the unit under full load.
Complete information regarding tank sizing for
vaporization, recommended regulator settings, and pipe
sizing is available from most regulator manufacturers and
LP/propane gas suppliers.
Check all connections for leaks when piping is completed,
using a soapy, non-chlorine based solution.
Some soaps
used for leak detection are corrosive to certain metals.
Carefully rinse piping thoroughly after completing
leak detection.
NOTE:
An optional bottom-entry gas kit is available for
these units. See the kit instructions for proper installation
details.
Danger of explosion.
Can cause injury or product or property
damage. Do not use matches, candles, flame
or other sources of ignition to check for leaks.
WARNING
If a flexible gas connector is required or allowed by
the authority that has jurisdiction, black iron pipe shall
be installed at the gas valve and must extend outside
the cabinet. The flexible connector can then be added
between the black iron pipe and the gas supply line.
CAUTION
