8
INSTALLATION (Continued)
ELECTRICAL CONNECTIONS
HAZARDOUS VOLTAGE!
disconnect ALL ELECTRIC
POWER INCLUDING REMOTE
DISCONNECTS BEFORE
SERVICING. Failure to
disconnect power before
servicing can cause severe
personal injury or death.
Standard units are shipped for use on 115 volt, 60 hertz,
single phase electric power. The motor name-plate 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
Do not use any tools (i.e. screwdriver,
pliers, etc.) across the terminals to check for power.
Use a voltmeter.
USE COPPER CONDUCTORS ONLY!
UNIT TERMINALS ARE NOT DESIGNED TO ACCEPT
OTHER TYPES OF CONDUCTORS. Failure to do so
may cause damage to the equipment
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 Electrical Code, ANSI/NFPA No. 70, or
CSA Standard C22.1 Sample wiring diagrams are shown
in Figures 6, and 7.
THERMOSTAT WIRING AND LOCATION
NOTICE: 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 (1.5m) above
the fl oor, 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 the operation of the
control.
3. Dead Areas- Areas where the air cannot circulate
freely, such as behind doors or in corners.
NOTICE: Thermostat wires tagged “W” and “G” must
be connected together except when using a general
purpose “SPDT” 24VAC relay and standard
thermostat with a subbase, or when using a
Honeywell T834H or T834N thermostat. Also refer to
Figure 5 for other wiring connections.
Figure 5 - C1267G
THERMOSTAT HEAT ANTICIPATOR ADJUSTMENTS
The initial heat anticipator setpoint should equal the
thermostat’s current amperage draw when the unit is
firing. This setpoint should be measured for the best
results. Use the recommended ranges for a guide. If
further information is needed, consult your thermostat
manufacturer’s instructions.
Recommended heat anticipator setting ranges:
25 ft. (7.6m) T'stat wiring
50 ft. T'stat wiring
0.85 to 0.90 A
0.90 to 1.1 A Max.
setting
on
t'stat
