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NOTE: An optional bottom-entry gas kit is available for
these units. See the kit instructions for proper installation
details.
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.
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.
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.
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.
High Voltage
Power Entry
Thermostat
Wire Entry
Gas Entry
WARNING
WARNING
CAUTION
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 disconnect switch
should be field provided for the unit; follow local codes to
determine what type of switch to use. 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. Use copper conductors only. Each unit must
be wired with a separate branch circuit and be properly
fused.
NOTE: An optional bottom-entry power kit is available for
these units. See the kit instructions for proper installation
details.
When connecting electrical power and control wiring
to the unit, waterproof type connectors must be used
so that water or moisture cannot be drawn into the unit
during normal operation.
CONTACTOR
GROUND
LUG
If 208 Volt is supplied, transformer connection must be
changed
Figure 5. 208/230 Line Voltage Wiring
Page 12
Electrical Wiring
CAUTION
FIELD-SUPPLIED FUSED
OR CIRCUIT BREAKER
DISCONNECT
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