International comfort products CSH5 Installation Instructions Manual page 6

INSTALLATION INSTRUCTIONS
Make Electrical Connections
WARNING
!
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal
injury or death.
Do not supply power to unit with compressor terminal box
cover removed.
Be sure field wiring complies with local and national fire,
safety, and electrical codes, and voltage to system is within
limits shown on unit rating plate. Contact local power
company for correction of improper voltage. See unit rating
plate for recommended circuit protection device.
NOTE: Operation of unit on improper line voltage constitutes
abuse and could affect unit reliability. See unit rating plate.
Do not install unit in system where voltage may fluctuate
above or below permissible limits.
NOTE: Use copper wire only between disconnect switch and
unit.
NOTE: Install branch circuit disconnect of adequate size per
NEC to handle unit starting current. Locate disconnect within
sight from and readily accessible from unit, per Section
440−14 of NEC.
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.
Figure 6 Line Power Connections
DISCONNECT
PER N. E. C. AND/OR
LOCAL CODES
FIELD POWER
WIRING
FIELD GROUND
WIRING
6
CONTACTOR
GROUND
LUG
R−410A Split System Heat Pumps
Connect Control Wiring
Route 24−v control wires through control wiring grommet and
connect leads to control wiring. See Thermostat Installation
Instructions for wiring specific unit combinations.
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
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 if refrigerant tubing is longer
than 80 ft. (24.38 m). Refer to the Long Line Applications
Guideline.
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.
Figure 7 Outdoor Air Thermistor (OAT) Attachment
OAT Thermistor must be locked in place
with spherical nib end facing towards
the front of the control box
The Outdoor Coil Temperature (OCT) Thermistor is factory
installed on the 3/8" diameter stub tube located on the coil
requirement. Determine total
DX+ DX- C R
428 01 5105 01