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Installation: Electrical
Electrical Connections
WARNING
Hazardous Service Procedures!
The maintenance and troubleshooting procedures
recommended in this section of the manual could result
in exposure to electrical, mechanical or other potential
safety hazards. Always refer to the safety warnings
provided throughout this manual concerning these
procedures. When possible, disconnect all electrical
power including remote disconnect and discharge all
energy storing devices such as capacitors before
servicing. Follow proper lockout/tagout procedures to
ensure the power can not be inadvertently energized.
When necessary to work with live electrical
components, have a qualified licensed electrician or
other individual who has been trained in handling live
electrical components perform these tasks. Failure to
follow all of the recommended safety warnings
provided, could result in death or serious injury.
WARNING
Hazardous Voltage and Gas!
Turn off the gas supply and disconnect all electric
power, including remote disconnects before servicing
unit. Follow proper lockout/tagout procedures to
ensure the power can not be inadvertently energized
and the gas can not be inadvertently turned on. Failure
to turn off gas or disconnect power before servicing
could result in death or serious injury.
WARNING
Proper Field Wiring and Grounding
Required!
All field wiring MUST be performed by qualified
personnel. Improperly installed and grounded field
wiring poses FIRE & ELECTROCUTION hazards. To
avoid these hazards, you MUST follow requirements for
field wiring installation and grounding as described in
NEC and your local/state electrical codes. Failure to
follow these requirements could result in death or
serious injury.
Standard units are shipped for use on 115 volt, 60 hertz
single phase electric power. The motor nameplate and
electrical rating of the transformer should be checked
before energizing the duct furnace electrical system. All
external wiring must conform to the latest edition of ANSI/
NFPA No. 70 National Electrical Code and applicable local
codes; in Canada, to the Canadian Electrical Code, Part 1
CSA Standard C22.1.
24
NOTICE:
Use Copper Conductors Only!
Unit terminals are not designed to accept other types
of conductors. Failure to use copper conductors could
result in equipment damage.
It is recommended that the electrical power supply to each
duct furnace be provided by a separate, fused, and
permanently live electrical circuit. A disconnect switch of
suitable electrical rating should be located as close to the
gas valve as possible. Each duct furnace must be
electrically grounded in accordance with the latest edition
of the National Electric Code, ANSI/NFPA No. 70 or CSA
Standard C22.1. Sample wiring connections are depicted
in
Figure 22, p. 39
and
Figure 23, p.
Thermostat Wiring and Location
Note: The thermostat must be mounted on a vertical,
vibration-free surface, free from air currents, and in
accordance with the furnished instructions.
Mount the thermostat approximately 5 feet (1.5 m) above
the floor in an area where it will be exposed to a free
circulation of average temperature air. Always refer to the
thermostat instructions as well as our unit wiring diagram,
and wire accordingly. Avoid mounting the thermostat in
the following locations:
1. Cold areas—Outside walls or areas where drafts may
affect the operation of the control.
2. Hot areas—Areas where the sun's rays, radiation, or
warm air currents may affect control operation.
3. Dead areas—Areas where air cannot circulate freely,
such as behind doors or in corners.
Note: Thermostat wires tagged "W" and "G" must be
connected together except when using a general
purpose "SPDT" 24 Vac relay and a standard
thermostat with subbase, or when using
Honeywell T834H or T834N thermostats. Also refer
to
Figure 17, p. 24
Figure 17.
C1267G, thermostat wiring diagram
Thermostat Heat Anticipator Adjustments.
initial heat anticipator setpoint should equal the
thermostat's current amperage draw when the unit is
40.
for other wiring connections.
The
GMND-SVX01B-EN
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