6
Figure 7. Power Entry Locations
Low Voltage
Line Voltage
conductors and circuit protection must be in compliance with
information listed on the unit data label. Any other wiring
methods must be acceptable to authority having jurisdiction.
• Provide power supply for the unit in accordance with the
unit wiring diagram, and the unit rating plate. Connect the
line-voltage leads to the terminals on the contactor inside
the control compartment. Extend leads through power wiring
hole. Connect
L1
&
L2
directly to the contactor. See
for power entry locations.
• The unit requires both power and control circuit electrical
connections. Refer to the wiring diagram for identification
and location of unit field wiring interfaces. Make all electrical
connections in accordance with all applicable codes and
,
• Overcurrent protection must be provided at the branch circuit
distribution panel and sized as shown on the unit rating label
and according to applicable local codes. See the unit rating
plate for minimum circuit ampacity and maximum overcurrent
protection limits.
• 208/230 Volt units are shipped from the factory wired for 230
volt operation. For 208V operation, remove the lead from
the transformer terminal marked 240V and connect it to the
terminal marked 208V.
• Use only copper wire for the line voltage power supply to
this unit as listed in
. Use proper code agency listed
conduit and a conduit connector for connecting the supply
wires to the unit. Use of rain tight conduit is recommended.
• Optional equipment requiring connection to the power or
control circuits must be wired in strict accordance of the NEC
(ANSI/NFPA 70), applicable local codes, and the instructions
provided with the equipment.
COPPER WIRE SIZE — AWG
(1% Voltage Drop)
Supply Wire Length-Feet
Supply Circuit
Ampacity
200
150
100
50
6
8
10
14
15
4
6
8
12
20
4
6
8
10
25
4
4
6
10
30
3
4
6
8
35
3
4
6
8
40
2
3
4
6
45
2
3
4
6
50
2
3
4
6
55
1
2
3
4
60
Wire Size based on N.E.C. for 60° type copper conductors.
Table 1. Copper Wire Size
Table 2. Thermostat Wire Gauge
Thermostat
Wire Gauge
Recommended T-Stat Wire
Length (Unit to T-Stat)
2-Wire
Heating)
5-Wire
(Heating/Cooling)
24
55
25
22
90
45
20
140
70
18
225
110
ELECTRICAL CONNECTIONS
WARNING:
ELECTRICAL SHOCK, FIRE OR
EXPLOSION HAZARD
Failure to follow safety warnings exactly could
result in serious injury, death or property damage.
Improper servicing could result in dangerous
operation, serious injury, death or property
damage.
• Before servicing, disconnect all electrical power
to the indoor blower.
• When servicing controls, label all wires prior
to disconnecting. Reconnect wires correctly.
• Verify proper operation after servicing.
• All electrical connections must be in compliance with
all applicable local codes and ordinances, and with
the current revision of the National Electric Code
(ANSI/NFPA 70).
• For Canadian installations the electrical connections and
grounding shall comply with the current Canadian Electrical
Code (CSA C22.1 and/or local codes).
Pre-Electrical Checklist
√
Verify that the voltage, frequency, and phase of the supply
source match the specifications on the unit rating plate.
√
Verify that the service provided by the utility is sufficient to
handle the additional load imposed by this equipment. Refer
to the unit wiring label for proper high and low voltage wiring.
√
Verify factory wiring is in accordance with the unit wiring
diagrams:
, or
. Inspect for loose connections.
Line Voltage
• A wiring diagram is located on the inside cover of the electrical
box of the unit. The installer should become familiar with the
wiring diagram before making any electrical connections to
the unit.
•
An electrical disconnect must be located within sight
of and readily accessible to the unit.
This switch shall be
capable of electrically de-energizing the unit.
• Line voltage to the unit should be supplied from a dedicated
branch circuit containing the correct fuse or circuit breaker for
the unit. Incoming field wiring and minimum size of electrical
