Rheem RXRZ-C02 Installation Manual

INSTALLATION INSTRUCTIONS

LOW AMBIENT CONTROL PACKAGE RXRZ-C02

6 THROUGH 25 TON R-410A UNITS

Commercial Package Air Conditioners

Commercial Package Gas Electric Units

(Kit contains one low ambient pressure control. Order one kit for each compressor on unit.)

Recognize this symbol as an indication of Important Safety Information!

WARNING

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.

PARTS LIST

Description Part Number Quantity

Low Ambient Pressure Control AS-103034-01 1 Installation Instructions 92-103031-01 1

WARNING

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.

LOW AMBIENT CONTROL ASSEMBLY

FIGURE 1

CAUTION

When making flare connections, use a back-up wrench to avoid breaking connection or splitting flare.

I. INSTALLING LOW AMBIENT CONTROL

A. Open blower access door. Refer to Figure 2. B. Remove cap from liquid line service port. Install low ambi-

ent control(s) on liquid line service port(s). Torque control 8-10 ft. lbs. Do not over torque.

C. Check all connections for refrigerant leaks and repair as

necessary.

II. ELECTRICAL CONNECTIONS

Remove factory jumper wire connections. Connect female 2 wire connector(s) from unit to male 2 wire connector(s) on low ambient control(s). See unit wiring diagram.

NOTE: A low ambient control is required for each compressor. If two compressor units, require two low ambient controls.

SUPERSEDES 92-103031-01-00

92-103031-01-01

FIGURE 2. LOW AMBIENT CONTROL INSTALLATION

TORQUE CONTROL 8-10 FT. LBS. DO NOT OVER TORQUE

OR DAMAGE TO CONTROL WILL RESULT.

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).

NOTE: Liquid line pressure for multiple compressors must all drop below 250 before fans will cycle off and above 450 before fans will cycle on.

CM 1013