Installation guide

Table 2--Accessory Usage
REQUIRED FOR REQUIRED FOR
LOW=AMBIENT LONG-LINE
APPLICATIONS APPLICATIONS*
(BELOW SS°F) (OVER S0 FT)
REQUIRED FOR
SEA COAST
ACCESSORY APPLICATIONS
(WITHIN 2 MILES)
Crankcase Heater Yes Yes No
Evaporator Freeze Thermostat Yes No No
Winter Start Control YeM- No No
Accumulator No No No
Compressor Start Assist
Yes Yes No
Capacitor and Relay
MotorMaster TM Control
or Yes No No
Low-Ambient Pressure Switch
Wind Baffle See Low-Ambient Instructions No No
Coastal Filter No No Yes
Support Feet Recommended No Recommended
Liquid-Line Solenoid Valve See Long-Line
or No Application No
Hard Shutoff TXV GuideIine
Ball Bearing Fan Motor YeMt No No
*For tubing line sets between 50 and 175 ft, refer to Residential Split System Long-Line Application Guideline
tOnty when low-pressure switch is used
*Required for low-ambient controlIer (full modulation feature) and MotorMaster Control only
Step 6--Making Tubing Connections
Relieve pressure and recover all refi'igerant before system
repair or final unit disposal to avoid personal injury or death.
Use all service ports and open all flow-control devices,
including solenoid valves.
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If ANY refrigerant tubing is buried, provide a 6 in. vertical
rise at service valve. Refrigerant tubing lengths up to 36 in.
may be buried without further special consideration. For
lengths above 36 in., consult your local distributor.
REFRIGERANT TUBING Connect tubing to fittings on
outdoor unit vapor and liquid service valves. (See Table 1.) Use
refrigerant grade tubing.
SWEAT CONNECTION Service valves are closed from
factory and ready for brazing. After wrapping the selwice valve
with a wet cloth, the tubing set can be brazed to the service valve
using either silver bearing or non-silver bearing brazing material.
Con-sult local code requirements. Refrigerant tubing and indoor
coil are now ready for leak testing. This check should include all
field and factory joints.
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To prevent damage to unit or service valves observe the
following:
•Use a brazing shield.
•Wrap service valves with wet cloth or use a heat sink
material.
Outdoor units may be connected to indoor section using accessory
tubing package or field-supplied refrigerant tubing of correct size
and condition. For tubing requirements beyond 50 ft, substantial
capacity and performance losses can occur. Following the recom-
mendations in the Residential Split System Long-Line Application
Guideline will reduce these losses. Refer to Table 1 for field tubing
equivalent line length. Refer to Table 2 lbr accessory require-
lIlents.
For buried-line applications greater than 36 in., consult your local
distributor.
If refi'igerant tubes or indoor coil are exposed to atmosphere, they
must be evacuated to 500 microns to eliminate contamination and
moisture in the system.
OUTDOOR /_'IT CONNECTED TO FACTORY-APPROVED
INDOOR LEX'IT Outdoor unit contains correct system refriger-
ant charge for operation with indoor unit of same size when
connected by 15 ft of field-supplied or factory-accessory tubing.
Check refrigerant charge for maximum efficiency.
Step 7--Make Electrical Connections
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 con'ection 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 or phase imbalance may
fluctuate above or below permissible limits.
NOTE: Use copper wire only between disconnect switch and
unit.
NOTE: Install branch circuit of adequate size per NEC to handle
unit starting current. Locate disconnect within sight from and
readily accessible fi'om unit per Section 440-14 of NEC.