Payne PA1Z Installation, Start-Up And Service Instructions Manual page 8

CAUTION: Failure to follow these precautions could
result in damage to the unit being installed:
1. Make all electrical connections in accordance with
NEC ANSI/NFPA (latest edition) and local elec-
trical codes governing such wiring. In Canada, all
electrical connections must be in accordance with CSA
Standard C22.1 Canadian Electrical Code Part 1
and applicable local codes. Refer to unit wiring
diagram.
2. Use only copper conductor for connections between
field-supplied electrical disconnect switch and unit.
DO NOT USE ALUMINUM WIRE.
3. Be sure that high-voltage power to unit is within
operating voltage range indicated on unit rating plate.
On 3-phase units, ensure that phases are balanced
within 2%. Consult local power company for correc-
tion of improper voltage and/or phase imbalance.
4. Insulate low-voltage wires for highest voltage con-
tained within conduit when low-voltage control wires
are run in same conduit as high-voltage wires.
5. Do not damage internal components when drilling
through any panel to mount electrical hardware, con-
duit, etc.
A. High-Voltage Connections
The unit must have a separate electrical service with a field-
supplied, waterproof disconnect switch mounted at, or within
sight from the unit. Refer to the unit rating plate for maxi-
mum fuse/circuit breaker size and minimum circuit amps
(ampacity) for wire sizing. See Table 3 for electrical data.
The field-supplied disconnect may be mounted on the unit over
the high-voltage inlet hole. See Fig. 2-4.
CAUTION: Operation of unit on improper line volt-
age constitutes abuse and may cause unit damage that
could affect warranty.
B. 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. 10 for location). When the leads are inside
the unit, run leads to the control box (Fig. 11). For single-
phase units, connect leads to the black and yellow wires; for
3-phase units, connect the leads to the black, yellow, and blue
wires (see Fig. 12).
C. Connecting Ground Lead to Unit Ground
Refer to Fig. 11 and 12. Connect the ground lead to the chas-
sis using the unit ground lug in the control box.
D. Routing Control Power Wires
Form a drip-loop with the thermostat leads before routing
them into the unit. Route the thermostat leads through grom-
meted hole provided in unit (see Fig. 10) into unit control box.
Connect thermostat leads to unit control power leads as shown
in Fig. 13.
Route thermostat wires through grommet providing a drip
loop at the panel. Connect low-voltage leads to the thermo-
stat as shown in Fig. 13.
The unit transformer supplies 24-v power for complete sys-
tem including accessory electrical heater. Transformer is
factory wired for 230-v operation. If supply voltage is 208 v,
rewire transformer primary as described in the Special Pro-
cedures for 208-v Operation section below.
E. 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. 14.
F. Special Procedures for 208-V Operation
WARNING: Make sure that the power supply to the
unit is switched OFF before making any wiring changes.
Electrical shock can cause personal injury or death.
1. Remove wirenut from connection of ORG wire to BLK
wire. Disconnect the ORG transformer-primary lead from
the BLK wire. Save wirenut. See unit wiring label.
2. Remove the wirenut from the terminal on the end of the
RED transformer-primary lead.
3. Save the wirenut.
4. Connect the RED lead to the BLK wire from which the
ORG lead was disconnected. Insulate with wirenut from
Step 1.
5. Using the wirenut removed from the RED lead, insu-
late the loose terminal on the ORG lead.
6. Wrap the wirenuts with electrical tape so that the metal
terminals cannot be seen.
Indoor blower-motor speeds may need to be changed for 208-v
operation. Refer to Indoor Airflow and Airflow Adjustments
section on page 14.
HIGH-VOLTAGE
POWER WIRING
ENTRY HOLE
Fig. 10 — Unit Electrical Connection Entry Holes
—8—
LOW-VOLTAGE
WIRING ENTRY
HOLE