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Electrical Connections − Power Supply
Do not apply power or close isconnect switch until
installation is complete. Refer to start−up irections. Refer
closely to unit wiring iagram.
Refer to unit nameplate for minimum circuit ampacity an
maximum overcurrent protection.
1− All units are factory wire . For 208V supply,
isconnect the orange wire (230V) at control power
transformer. Reconnect the re wire (208V). Tape the
expose en of the 230V orange wire.
Units Wit out Optional Disconnect
1− The unit is provi e with power entry knockouts
through the base an the blower section mullion (see
page 1).
2− Horizontal Power Entry − Remove necessary
electrical knockouts on blower section mullion.
Bottom Power Entry −
Route wires through knockout on power entry cover.
NOTE − It may be necessary to punch larger holes for
power wiring (refer to current NEC/CEC requirements).
3− Install a equate isconnect switch external to unit in
accor ance with local or national co es as
applicable.
Units Wit Factory−Installed GFI
1− Remove necessary electrical knockouts in unit.
2− Make power wiring connections in bottom power
entry box.
3− Connect separate 120v wiring to GFCI outlet pigtails
in han y box on front left corner mullion.
Electrical Connections − Control Wiring
A−T ermostat Location
Room thermostat mounts vertically on any
non−con uctive flat surface.
Locate thermostat approximately 5 feet (1.5m) above the
floor in an area with goo air circulation at average
temperature. Avoi locating the room thermostat where it
might be affecte by:
− rafts or ea spots behin oors an in corners
−hot or col air from ucts
−ra iant heat from sun or units
−conceale pipes an chimneys
B−Control Wiring
1− Route thermostat cable or wires from subbase
through con uit provi e in unit. Refer to wiring
iagram on unit. For thermostat wire runs up to 60 feet
(18m), use 18 gauge wire. For 60 to 90 feet (18 to
27m) runs, use 16 gauge wire.
2− Install thermostat an humi ity sensor in
accor ance with instructions provi e with
thermostat or sensor. See figure 11 to wire units set
in local thermostat mo e. See figure 12 for units
wire in zone sensor mo e.
2− Install thermostat assembly in accor ance with
instructions provi e with thermostat.
IMPORTANT−Terminal connections at the wall plate or
subbase must be made securely. Loose control wire
connections may allow unit to operate but not with proper
response to room demand.
C−Commercial Controls Platform
Units without an optional factory−installe control system
may use a variety of ifferent temperature control systems.
The unit has a pre−wire jack−plug platform allowing a
variety of control systems to plug−in" to unit jack−plugs.
Control systems which have the mating commercial
controls platform jack−plug contain a control system wiring
iagram C" section. This iagram section is use with unit
an accessory iagram sections for total system
operation. Affix iagrams to unit in alpha−numeric or er as
shown in figure 10. Refer closely to installation instructions
provi e with each temperature control system for proper
unit operation.
FIGURE 10
COMPLETE SYSTEM DIAGRAM
A"
Heating
Section
B"
Unit
Section
C"
Control
Section
D"
Economizer
Section
