5
Route Ground and Power Wires
Remove access panel to gain access to unit wiring. Extend wires
from disconnect through power wiring hole provided and into unit
control box.
!
WARNING
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal
injury or death.
The unit cabinet must have an uninterrupted or unbroken
ground to minimize personal injury if an electrical fault
should occur. The ground may consist of electrical wire or
metal conduit when installed in accordance with existing
electrical codes.
Connect Ground and Power Wires
Connect ground wire to ground connection in control box for
safety. Connect power wiring to contactor as shown in Fig. 6.
DISCONNECT
PER N. E. C. AND/OR
LOCAL CODES
CONTACTOR
GROUND
LUG
FIELD GROUND
WIRING
FIELD POWER
WIRING
A91056
Fig. 6 -- Line Power Connections
Connect Control Wiring
Route 24--v control wires through control wiring grommet and
connect leads to control wiring. (See Fig. 11 & Fig. 12)
Use No. 18 AWG color--coded, insulated (35
_
C minimum) wire. If
thermostat is located more than 100 ft. (30.48 m) from unit, as
measured along the control voltage wires, use No. 16 AWG
color--coded, insulated wire to avoid excessive voltage drop.
All wiring must be NEC Class 1 and must be separated from
incoming power leads.
Use furnace transformer, fan coil transformer, or accessory
transformer for control power, 24--v/40--va minimum.
NOTE
:
Use of available 24--v accessories may exceed the
minimum 40--va power requirement. Determine total transformer
load and increase the transformer capacity or split the load with an
accessory transformer as required.
Final Wiring Check
IMPORTANT
: Check factory wiring and field wire connections
to ensure terminations are secured properly. Check wire routing to
ensure wires are not in contact with tubing, sheet metal, etc.
Compressor Crankcase Heater
When equipped with a crankcase heater, furnish power to heater a
minimum of 24 hr before starting unit. To furnish power to heater
only, set thermostat to OFF and close electrical disconnect to
outdoor unit.
A crankcase heater is required for low--ambient cooling or if
refrigerant tubing is longer than 80 ft. (24.38 m). Refer to the
Longline Guideline Section -- Residential Split--System Air
Conditioners and Heat Pumps Using Puron
r
Refrigerant.
Install Electrical Accessories
Refer to the individual instructions packaged with kits or
accessories when installing.
Check OAT Thermistor and OCT Thermistor
Attachments
Outdoor Air Temperature (OAT) Thermistor is factory installed by
inserting the nibs on either sides of the thermistor body through a
keyhole in the bottom shelf of the control box and locking it in
place by turning it 90 degrees, such that the spherical end of a nib
faces the front of the control box.
Check to make sure the OAT is locked in place. See Fig. 7.
OAT Thermistor must be locked in place
with spherical nib end facing towards
the front of the control box
A06313
Fig. 7 -- Outdoor Air Thermistor (OAT) Attachment
The Outdoor Coil Temperature (OCT) Thermistor is factory
installed on the liquid tube between the coil assembly and the
liquid service valve. See Fig. 8.
Check to make sure the thermistor is securely attached on the
liquid tube with the clip as shown in Fig. 8.
OCT Thermistor must be
secured tight on the liquid tube.
A05409
Fig. 8 -- Outdoor Coil Thermistor (OCT) Attachment
24AN
B
6
