Before making liquid tube connections, install factory-supplied solenoid valve on indoor liquid fitting. (See Fig. 4.) Be sure to use flare adapter
supplied with the indoor coil when making connections.
CAUTION: If a field-supplied power source is needed when adding solenoid, wiring must comply with local codes and
NEC requirements.
1. Remove coil liquid connection cap and discard.
2. Mount solenoid valve on liquid tube, making sure valve flow arrow points toward indoor coil. Mount valve in any position except valve
body at top and electric coil at bottom. (See Fig. 4.) The solenoid valve is to be installed a maximum of 2 ft from indoor coil.
3. Braze valve onto end of liquid tube using silver bearing or non-silver bearing brazing material. Consult local code requirements.
4. Braze flare adapter onto outlet end of the solenoid valve.
5. Wire solenoid coil into system control circuit as shown in Fig. 6.
D.
Refrigerant Tubing
Connect tubing to fittings on outdoor unit vapor and liquid service valves. (See Fig. 2.)
CAUTION: To avoid valve damage while brazing, service valves must be wrapped with a heat-sinking material such as
a wet cloth.
E.
Sweat Connection
Use refrigerant grade tubing. Service valves are closed from factory and ready for brazing. After wrapping the service 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. Consult local code requirements.
Refrigerant tubing and indoor coil are now ready for leak testing. This check should include all field and factory joints.
PROCEDURE 5—MAKE ELECTRICAL CONNECTIONS
WARNING: 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, safety and electrical codes, and voltage to system is within limits shown on unit rating
label. Contact local power company for correction of improper voltage. See unit rating label 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. Use copper wire only between disconnect switch and
unit. Install branch circuit disconnect per NEC of adequate size to handle unit starting current. Locate disconnect within sight from and readily
accessible from unit, per Section 440-14 of NEC.
Fig. 4—Solenoid Valve Installation
A87044
ELECTRICAL JUNCTION
ELECTRICAL COIL
VALVE
FLOW ARROW
STRAIGHT
3
/
8
IN. STUD
NOTE: System flow direction
must match arrow on
bottom of body.
—4—
