H. Check all connections for refrigerant leaks and repair as
necessary.
II. ELECTRICAL CONNECTIONS
A. Route leads from low ambient control up through the
plastic bushing installed in the upper condenser bulkhead
to the area behind the control box. From this point route
the wires through the opening in the left side of the con-
trol box.
B. Disconnect black lead from fan motor at T1 on contactor.
(Refer to Figure 3.) Connect low ambient control lead with
flat terminal to T1 on contactor.
FIGURE 3. LOW AMBIENT CONTROL WIRING
CM 0406
WIRE TIES
WIRE FROM
COMPRESSOR
SEE DETAIL
SUCTION
TUBE
LOW AMBIENT
PRESSURE
CONTROL
47-100571-02
LIQUID LINE
VALVE
ADAPTER
83-21457-02
WIRES FROM COMPRESSOR
WIRES FROM COMPRESSOR
WIRE TIES
COMPRESSOR
I513
VALVE ADAPTER
83-21457-02
SUCTION TUBE
SERVICE PORT
LIQUID LINE
FIGURE 2. LOW AMBIENT CONTROL INSTALLATION
DETAIL
C. Remove terminal from fan motor black lead and strip the
insulation back 1/2
ⴖ
from end of wire.
D. Connect the black lead from fan motor to the stripped
lead from control using wire nut provided.
E. Secure leads from control to a convenient wire bundle
using the wire tie provided in package.
F. Reinstall condenser fan assembly and control box cover.
G. Restore power to the unit and check unit operation.
III. UNIT CHECK
A. Restore power and check unit for proper operation.
B. Outdoor fan cycles off when liquid pressure drops below
250, ± 10 PSIG.
C. Outdoor fan cycles on when liquid pressure rises above
450, ± 10 PSIG.
This accessory is used when unit operation is required during
low ambient conditions. Installation of this control provides a
means of de-energizing the condenser fan motor. This permits
the suction (low side) to remain above the point which can
cause icing of evaporator (inside coil).
OFM
OFM
CC CONTACTOR
LAC LOW AMBIENT CONTROL
OFM OUTDOOR FAN MOTOR
LAC
LAC