4
13), Figure 6, (page 14), & Figure 7, (page 15).
Inspect for loose connections.
Line Voltage
• A wiring diagram is located on the inside cover of the
electrical box of the outdoor unit. The installer should
become familiar with the wiring diagram before making
any electrical connections to the outdoor 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 outdoor unit.
• Linevoltagetotheunitshouldbesuppliedfromadedicated
branch circuit containing the correct fuse or circuit breaker
for the unit. Incoming field wiring and minimum size of
electrical conductors and circuit protection must be in
compliance with information listed on the outdoor unit
data label. Any other wiring methods must be acceptable
to authority having jurisdiction.
• Theoutdoorunitrequiresbothpowerandcontrolcircuit
electrical connections. Refer to the wiring diagram /
schematic for identification and location of outdoor unit
field wiring interfaces. See
Figure 4, Figure 5, Figure 6,
&
Figure 7. Make all electrical connections in accordance
with all applicable codes and ordinances.
• 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.
• Providepowersupplyfortheunitinaccordancewiththe
unit wiring diagram, and the unit rating plate. Connect the
line-voltage leads to the terminals on the contactor inside
the control compartment.
• Useonlycopperwireforthelinevoltagepowersupplyto
this unit as listed in
Table 1. 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.
• 208/230Voltunitsareshippedfromthefactorywiredfor
230 volt operation. For 208V operation, remove the lead
from the transformer terminal marked 240V and connect
it to the terminal marked 208V.
• Optionalequipmentrequiringconnectiontothepoweror
control circuits must be wired in strict accordance of the
NEC (ANSI/NFPA 70), applicable local codes, and the
instructions provided with the equipment.
• When connecting refrigerant linesets together, it is
recommended that dry nitrogen be flowing through the
joints during brazing to prevent internal oxidation and
scaling.
• Refrigerant tubing should be routed in a manner that
minimizes the length of tubing and the number of bends
in the tubing. If precise forming of refrigerant lines is
required, a copper tubing bender is recommended. Avoid
sharp bends and contact of the refrigerant lines with metal
surfaces.
• Refrigeranttubingshouldbesupportedinamannerthatthe
tubing will not vibrate or abrade during system operation.
• Tubing should be kept clean of foreign debris during
installation.
• Everyeffortshouldbemadebytheinstallertoensurethat
the field installed refrigerant containing components of
the system have been installed in accordance with these
instructions and sound installation practices to insure
reliable system operation and longevity.
• Themaximumrecommendedinterconnectingrefrigerant
line lengths is 75 ft. and the vertical elevation difference
between the indoor and outdoor sections should not exceed
20 ft.
• Alterdryerisprovidedwiththeunitandmustbeinstalled
in the liquid line of the system. If the installation replaces a
system with a filter dryer already present in the liquid line,
the filter dryer must be replaced with the one supplied with
the unit. The filter dryer must be installed in strict accordance
with the manufacturer’s installation instructions.
• Optionalequipmentsuchas liquidline solenoidvalves,
low ambient, etc., should be installed in strict accordance
with the manufacturer’s installation instructions.
ELECTRICAL WIRING
WARNING:
ELECTRICAL SHOCK OR FIRE HAZARD
To avoid risk of electrical shock, personal injury,
or death, disconnect all electrical power to the unit
before performing any maintenance or service. The
unit may have more than one electrical supply.
Label all wires prior to disconnection when
servicing the unit. Wiring errors can cause improper
and dangerous operation.
• 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).
• ForCanadianinstallationstheelectricalconnectionsand
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 voltage wiring.
√ Verify factory wiring is in accordance with the unit wiring
diagram. See
Figure 4, (page 12), Figure 5, (page
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
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