Installation guide

Table 2--Accessory Usage
REQUIRED FOR REQUIRED FOR
LOW-AMBIENT LONG-LINE
ACCESSORY APPLICATIONS APPLICATIONS*
(BELOW 55°F) (OVER 50 FT)
Crankcase Heater Yes Yes
Evaporator Freeze Thermostat Yes No
Accumulator No No
Compressor Start Assist Yes Yes
Capacitor and Relay
Low-Ambient Controller,
MotorMaster_ Control, Yes NO
or
Low-Ambient Pressure Switch
Wind Baffle See Low-Ambient Instructions No
Support Feet Recommended No
Liquid-Line Solenoid Valve See Long-Line
or No Application
Hard Shutoff TXV Guideline
Ball Bearing Fan Motor Yes_ No
• Fortubinglinesetsbetween 50 and 175 ft, referto ResidentialSplitSystem Long-LineApplicationGuideline.
_: Requiredfor Low-AmbientController(fullmodulation feature) and MotorMasterControlonly
PISTON
ROUTE GROUND AND POWER WIRES
Remove access panel and control box cover to gain access to unit
wiring. Extend wires from disconnect through power wiring hole
provided and into unit control box.
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PISTON
PISTON RETAINER
SWEAT/FLARE ADAPTER
A94029
Fig. 6---Liquid Service Valve with Sweat Adapter
Tube
Step 9---Make Electrical Connections
¥!_ I[VI'__T=II: [_
To avoid 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, sal_ty,
and electrical codes, and voltage to system is within limits shown
on unit rating plate. Contact local power company lor correction of
improper voltage. See unit rating phne liar recommended circuit
protection device.
NOTE: Operation of unit on improper line voltage constitutes
abuse and could afl_ct unit reliability. See unit nning plale. Do not
install unit in system where voltage may Yluctuate above or below
permissible limits.
NOTE: Use copper wire only belween disconnect switch and
unit.
NOTE: Install branch circuit disconnect of adequate size per
NEC Io handle unit starling current. Locate disconnect within sight
from and readily accessible from unit, per Section 440-14 of NEC.
The unit cabinet must have an uninterrupted or unbroken
ground to minimize pe_onal 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. Failure to follow this warning can result in an
electric shock, fire, or death.
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. 7.
DISCONNECT
PER N. E. C. AND/OR
LOCAL CODES
FELD POWER I
WIRING
FIELD GROUND
®
WIRING j GROUND
LUG
Fig. 7--Line Power Connections
CONTACTOR
.©°©
©o©
A91056
CONNECT CONTROL WIRING
Route 24-v control wires through control wiring grommet and
connect leads to control wiring. (See Fig. 8-12.)
Use No. 18 AWG color-coded, insulated (35°C minimum) wire. If
thermostat is Ioca[ed more than 100 ft from unit. as measured
along the control voltage wires, use No. 16 AWG color-coded wire
to avoid excessive voltage drop.
-") All wiring must be NEC Class I and must be separated from
incoming power leads.
4