6
Operation of unit on improper line voltage constitutes abuse and
may cause unit damage that could affect warranty .
ROUTING POWER LEADS INTO UNIT
Use only copper wire between disconnect and unit. The
high-- voltage leads should be in a conduit until they enter the unit;
conduit termination at the unit must be watertight. Run the
high-- voltage leads through the hole on the control box side of the
unit (See Fig. 7). When the leads are inside the unit, run leads to the
control box (SeeFig. 8).For single-- phaseunits, connectleads to the
black and yellow wires (See Fig. 9).
CONNECTING GROUND LEAD TO UNIT GROUND
Connect the ground lead to the chassis using the unit ground in the
control box (See Fig. 8 and 9).
ROUTING CONTROL POWER WIRES (24 --V)
Form a drip --loop with the thermostatleads beforerouting theminto
the unit. Route the thermostat leads through grommeted hole
provided in unit into unit control box (See Fig. 7). Connect
thermostatleads and unit power leads as shown in Fig. 9, 10 and 11.
Route thermostat wires through grommet providing a drip-- loop at
the panel. Connect low--voltage leads to the thermostat as shown in
Fig. 10 & 11.
The unit transformer supplies 24--v power for complete system
including accessory electrical heater. Transformer is factory wired
for 230-- v operation.
ACCESSORY ELECTRIC HEAT WIRING
Refer to accessory electric heat installation instructions for
information on installing accessory electric heat. Accessory electric
heat wiring is shown in Fig. 12, 13, 14 and 15.
HIGH-VOLTAGE POWER
WIRING ENTRY HOLE
LOW-VOLTAGE WIRING
ENTRY HOLE
A05198
Fig. 7 -- Unit Electrical Connection
HEATER LOW
VOLTAGE PLUG
A05388
Fig. 8 -- Control Box Wiring
3-PHASE
CONNECTIONS
TO DISCONNECT
PER NEC
SINGLE-PHASE
CONNECTIONS
TO DISCONNECT
PER NEC
GROUND
LEAD
UNIT GROUND
BLK
YEL
BLU
L
L
L
C00012
Fig. 9 -- Line Power Connections
Unit Control
Power
Thermostat
and subbase
G
Y
W2
W3
R
RED
GRN
YEL
C
BRN
WHT
VIO
A05213
Fig. 10 -- Control Connections (Sizes 024 --042)
50ZPA
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