Rheem RXRZ-B01 Installation Instructions Manual
When making flare connections, use a back-up wrench to
avoid breaking connection or splitting flare.
I. INSTALLING LOW AMBIENT CONTROL WITHOUT HIGH
PRESSURE CONTROL BEING INSTALLED.
A. Remove condenser fan and cover assembly from top of
condenser section.
B. Remove control box cover.
C. Secure the low ambient control to the bracket provided,
using (2) wire ties. (Refer to Figure 1.)
D. Remove existing screw located at the top of the con-
denser section side panel close to the control box. (Refer
to Figure 2.) Install the bracket and control assembly
using existing screw.
E. Remove cap from liquid line service port under condenser
fan. Install cap on service port end (with valve core) of
adapter provided.
NOTE:” If a high pressure control is to be installed at this
time, the valve core needs to be removed from the
adapter and the control attached in place of the cap. Refer
to installation instructions for the high pressure control.
F. Connect tubing from control to end of adapter tee without
valve core.
G. Carefully route control tubing to make sure it doesn’t
come in contact with vibrating parts that could cause damage and connect tee to high side service port.
INSTALLATION INSTRUCTIONS
LOW AMBIENT CONTROL PACKAGE RXRZ-B01
2 THROUGH 4 TON R-410A UNITS
Package Air Conditioners
Package Gas Electric Units
92-22046-12-00
THIS ACCESSORY IS INTENDED TO BE INSTALLED BY A QUALIFIED, LICENSED SERVICE PERSON. TO AVOID
UNSATISFACTORY OPERATION OR DAMAGE TO THE PRODUCT AND POSSIBLE UNSAFE CONDITIONS, INCLUDING ELECTRICAL SHOCK, REFRIGERANT LEAKAGE AND FIRE WHICH CAN RESULT IN PROPERTY DAMAGE, PERSONAL INJURY OR DEATH. THE INSTALLATION INSTRUCTIONS PROVIDED WITH THIS ACCESSORY MUST BE
STRICTLY FOLLOWED AND THE PARTS SUPPLIED USED WITHOUT SUBSTITUTION. DAMAGE TO THE PRODUCT
RESULTING FROM NOT FOLLOWING THE INSTRUCTIONS OR USING UNAUTHORIZED PARTS MAY BE EXCLUDED
FROM THE MANUFACTURER’S PRODUCT WARRANTY COVERAGE.
WARNING
!
Recognize this symbol as an indication of Important Safety Information!
!
PARTS LIST
Description Part Number Quantity
Low Ambient Pressure Control 47-100571-02 1
Bracket AE-56928-01 1
Adapter 83-21457-02 1
Wire Nut 45-18058-01 2
Wire Tie 64-17606-01 4
Screw #8 x 1/2 63-22153-01 3
Installation Instructions 92-22046-12 1
BEFORE BEGINNING ANY MODIFICATION, BE SURE THE
MAIN ELECTRICAL DISCONNECT SWITCH IS IN THE “OFF”
POSITION. FAILURE TO DO SO CAN CAUSE ELECTRICAL
SHOCK RESULTING IN PROPERTY DAMAGE, PERSONAL
INJURY OR DEATH.
WARNING
!
CAUTION
!
LOW AMBIENT CONTROL ASSEMBLY
FIGURE 1
LOW AMBIENT
CONTROL
MOUNTING
BRACKET
ATTACH USING
WIRE TIES
AS SHOWN
TIE
BRACKET
LOW
AMBIENT
CONTROL
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 control 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
VALV E
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 1/2ⴖ 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
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