Rheem RAWL Installation Manual

10 & 12.5 TON

15 & 20 TON

INSTALLATION INSTRUCTIONS

Recognize this symbol as an indication of Important Safety Information!

!

DO NOT DESTROY. PLEASE READ CAREFULLY AND

KEEP IN A SAFE PLACE FOR FUTURE REFERENCE.

!

WARNING

THESE INSTRUCTIONS ARE INTENDED AS AN AID TO
QUALIFIED, LICENSED SERVICE PERSONNEL FOR PROPER
INSTALLATION, ADJUSTMENT AND OPERATION OF THIS UNIT.
READ THESE INSTRUCTIONS THOROUGHLY BEFORE
ATTEMPTING INSTALLATION OR OPERATION. FAILURE TO
FOLLOW THESE INSTRUCTIONS MAY RESULT IN IMPROPER
INSTALLATION, ADJUSTMENT, SERVICE OR MAINTENANCE
POSSIBLY R E S U L T I N G IN F I R E , ELECTRICAL S H O C K ,
PERSONAL INJURY OR PROPERTY DAMAGE.

RAWL HIGH EFFICIENCY R-410A COMMERCIAL CONDENSING UNITS
NOMINAL SIZES 10, 12.5, 15 & 20 TONS

SUPERSEDES 92-42665-11-00

92-42665-11-01

TABLE OF CONTENTS

IMPORTANT: TO INSURE PROPER INSTALLATION AND OPERATION OF
THIS PRODUCT, COMPLETELY READ ALL INSTRUCTIONS PRIOR TO
ATTEMPTING TO ASSEMBLE, INSTALL, OPERATE, MAINTAIN OR REPAIR
THIS PRODUCT. IMMEDIATELY UPON RECEIPT, ALL CARTONS AND
CONTENTS SHOULD BE INSPECTED FOR TRANSIT DAMAGE. UNITS WITH
DAMAGED CARTONS SHOULD BE OPENED IMMEDIATELY. IF DAMAGE IS
FOUND, IT SHOULD BE NOTED ON THE DELIVERY PAPERS AND A
DAMAGE CLAIM FILED WITH THE LAST CARRIER.

IMPORTANT MESSAGE TO OWNER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

CHECKING PRODUCT RECEIVED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

ENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

G

STANDARD UNIT FEATURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Crankcase Heaters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Corrosive Environment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Installation General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Rooftop Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Slab Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

INSTALLATION OF PIPING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

YPICAL PIPING RECOMMENDATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-14

T

ELECTRICAL WIRING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Electrical Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Power Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Wire Routing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Grounding. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Thermostat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

TOOLS REQUIRED FOR INSTALLING & SERVICING R-410A MODELS . . . . . . . . . 17

SPECIFICATION OF R-410A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

QUICK REFERENCE GUIDE FOR R-410A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

REPLACEMENT UNITS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

EVAPORATOR COIL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

LEAK TESTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

EVACUATION AND CHARGING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

FINAL LEAK TESTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

PRE-START CHECK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

MAINTENANCE AND OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Sequence of Operation – RAWL-120. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Sequence of Operation – RAWL-125, -150, -180, -240, Two Stage . . . . . . . . . . . . . . . 22

Crankcase Heaters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Contactor (CC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

High Pressure Switch (HPC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Low Pressure Switch (LPC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Low Ambient Control (LAC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Order Parts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

CHARGING CHARTS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24-28

TROUBLESHOOTING CHART . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

WIRING DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30-31

2

RAWL—125 CAZ

VARIATIONS

ELECTRICAL DESIGNATION

C=208-230V, 3PH, 60HZ
D=460V, 3PH, 60HZ
Y=575V, 3PH, 60HZ

NOMINAL COOLING CAPACITY

120 = 120,000 BTU/HR (SINGLE COMPRESSOR)
125 = 120,000 BTU/HR (TANDEM COMPRESSOR)
150 = 150,000 BTU/HR (TANDEM COMPRESSOR)
180 = 180,000 BTU/HR (TANDEM COMPRESSOR)
240 = 240,000 BTU/HR (TANDEM COMPRESSOR)

COMPRESSOR TYPE

Z = SCROLL

= STANDARD MODEL

A

DESIGN SERIES

(R410A)

COMMERCIAL

REMOTE CONDENSING UNIT

TRADENAME

3

WARNING

!

THE MANUFACTURER’S WARRANTY DOES NOT COVER ANY DAM­AGE OR DEFECT TO THE AIR CONDITIONER CAUSED BY THE
ATTACHMENT OR USE OF ANY COMPONENTS, ACCESSORIES OR
DEVICES (OTHER THAN THOSE AUTHORIZED BY THE MANUFAC­TURER) INTO, ONTO OR IN CONJUNCTION WITH THE AIR CONDI­TIONER, YOU SHOULD BE AWARE THAT THE USE OF UNAUTHO­RIZED COMPONENTS, ACCESSORIES OR DEVICES MAY
ADVERSELY AFFECT THE OPERATION OF THE AIR CONDITIONER
AND MAY ALSO ENDANGER LIFE AND PROPERTY. THE MANUFAC­TURER DISCLAIMS ANY RESPONSIBILITY FOR SUCH LOSS OR
INJURY RESULTING FROM THE USE OF SUCH UNAUTHORIZED
COMPONENTS, ACCESSORIES OR DEVICES.

IMPORTANT MESSAGE TO OWNER

The manufacturer assumes no responsibility for equipment installed in vio­lation of any code or regulation. The operation portion of this manual gives
instructions as to the service and care of the unit. It is recommended that
the installer go over the operation portion of this manual with the owner so
that there is a full understanding of the equipment and how it is intended to
function.

These instructions should be read and kept for future reference. It is sug­gested that this booklet be affixed to or adjacent to the indoor equipment. It
is addressed to your dealer and serviceman, but we highly recommend that
you read it—paying particular attention to the section titled “MAINTE­NANCE.”

CHECKING PRODUCT RECEIVED

Upon receiving unit, inspect it for any shipping damage. Claims for damage,
either apparent or concealed, should be filed immediately with the shipping
company. Check condensing unit model number, electrical characteristics
and accessories to determine if they are correct. Check system compo­nents (evaporator coil, condensing unit, evaporator blower, etc.) to make
sure they are properly matched.

GENERAL

The information contained in this manual has been prepared to assist in the
proper installation, operation and maintenance of the air conditioning sys­tem. Improper installation, or installation not made in accordance with these
instructions, can result in unsatisfactory operation and/or dangerous condi­tions, and can cause the related warranty not to apply.
Read this manual and any instructions packaged with separate equipment
required to make up the system prior to installation. Retain this manual for
future reference.
To achieve unit design operating efficiency and capacity, the indoor cooling
coils listed in the condensing unit specification sheet should be used.

STANDARD UNIT FEATURES

CABINET — Galvanized steel with a durable powder paint finish. Stamped
louvered panels offer 100% protection for the condenser coil.

COMPRESSOR — The Scroll Compressor is hermetically sealed with inter­nal overload protection and durable insulation on motor windings. The
entire compressor is mounted on rubber grommets to reduce vibration and
noise.

CONDENSER COIL — Constructed with copper tubes and aluminum fins
mechanically bonded to the tubes for maximum heat transfer capabilities.

BASE PAN — Galvanized steel with powder coat paint finish.
REFRIGERANT CONNECTIONS — Field piping connections are made

through a fixed panel. This allows complete access or removal of access
panels after piping connections have been made.

4

CRANKCASE HEATER — Standard, all models. Prevents refrigerant

igration to compressor(s).

m
LOW AMBIENT CONTROL — A pressure sensitive fan cycling control to

allow unit operation to 0°F is standard.
SERVICE VALVES — Standard on liquid and suction lines. Allows outdoor

section to be isolated from indoor coil.
SERVICE ACCESS — Control box as well as the compressor and other

refrigerant controls being accessible through access panels.
Control box may be open without affecting the normal operation of the unit.
Condenser fan motors are accessible by removing wire grilles.

FILTER DRIER — Standard (uninstalled) on all models. Helps ensure
refrigerant cleanliness.

TRANSFORMER — Step down type, line to 24 volts. Provides control cir­cuit voltage.

CONTACTOR — The contactor is an electrical switch which operates the
compressor and condenser fans.

HIGH PRESSURE CONTROL — Opens the contactor circuit on high refrig­erant pressure; manual reset.

LOW PRESSURE CONTROL — Stops compressor operation in the event
of loss of refrigerant.

CONDENSER FAN MOTOR (Direct Drive) — Ball bearing 1075 RPM
motors are mounted to minimize vibration and noise problems. These are
permanent split capacitor types.

TESTING — All units are run tested at the factory prior to shipment. Units
are shipped with a holding charge of nitrogen.

EXTERNAL GAUGE PORTS — Allows pressures to be checked without
removing access panel.

COIL LOUVERS — Helps prevent damage to outdoor coils.
TIME DELAY — Supplied on tandem compressor models to provide a delay

between stages.

EQUIPMENT GROUND — Lug for field connecting of ground wire.

RAWL-120, RAWL-125, RAWL-150, RAWL-180, RAWL-240 FEATURES

FIGURE 1

CONTACTOR TRANSFORMER CAPACITOR

RAWL-120 RAWL-125

HIGH
PRESSURE
SWITCH

HIGH
PRESSURE
SWITCH

LOW
VOLTAGE
CONNECTIONS

LINE
VOLTAGE
ENTRY

24 VOLT
ENTRY

LOW
PRESSURE
GAUGE
PORT

HIGH
PRESSURE
GAUGE
PORT

LIQUID
LINE

LOW
AMBIENT
CONTROL

SCROLL
COMPRESSOR

LOW
VOLTAGE
CONNECTIONS

LOW
PRESSURE
SWITCH

SUCTION
LINE

LINE VOLTAGE
TERMINAL BLOCK

LINE
VOLTAGE
ENTRY

24 VOLT
ENTRY

CONTACTORS TRANSFORMER CAPACITORS

TIME DELAY

RAWL-150
RAWL-180
RAWL-240

LOW
AMBIENT
CONTROL

LOW
PRESSURE
SWITCH

SCROLL
TANDEM
COMPRESSORS

LOW
PRESSURE
GAUGE
PORT

HIGH
PRESSURE
GAUGE
PORT

LIQUID
VALVE

SUCTION
VALVE

5

ELECTRICAL AND PHYSICAL DATA

TABLE 1

Model

Number

RAWL-

Phase
Frequency (Hz)
Voltage (Volts)

Compressor

Rated Load

Amperes

(RLA)

ELECTRICAL

Locked Rotor

Amperes

(LRA)

Fan Motor

Full Load

Amperes

(FLA)

Minimum

Circuit

Ampacity

Amperes

Fuse or HACR

Circuit Breaker

Minimum

Amperes

Maximum

Amperes

Face Area

Sq. Ft. (m

Outdoor Coil

No.

2

)

Rows

CFM
[L/s]

PHYSICAL

Refrig.

Per
Circuit
Oz. [g]

Net

Lbs. [kg]

Weight

Shipping
Lbs. [kg]

Rev. 8/14/2008
120CAZ 3-60-208/230 30.1/30.1 225 4.8 43/43 50/50 60/60 27 [2.51] 2 8000 [3775] 339 [9611] 501 [227.3] 541 [245.4]

120DAZ 3-60-460 16.7 114 2.8 24 30 40 27 [2.51] 2 8000 [3775] 339 [9611] 501 [227.3] 541 [245.4]

120YAZ 3-60-575 12.2 80 2 18 25 25 27 [2.51] 2 8000 [3775] 339 [9611] 501 [227.3] 541 [245.4]
125CAZ 3-60-208/230 17.6/17.6 123 4.8 45/45 50/50 60/60 27 [2.51] 2 8000 [3775] 300 [8505] 586 [265.8] 626 [284]

125DAZ 3-60-460 9.6 62 2.8 25 30 30 27 [2.51] 2 8000 [3775] 300 [8505] 586 [265.8] 626 [284]

125YAZ 3-60-575 6.1 40 2 16 20 20 27 [2.51] 2 8000 [3775] 300 [8505] 586 [265.8] 626 [284]
150CAZ 3-60-208/230 22.4/22.4 149 4.8 56/56 70/70 70/70 32.88 [3.05] 2 8000 [3775] 378 [10716] 650 [294.8] 690 [313]

150DAZ 3-60-460 10.6 75 2.8 27 30 35 32.88 [3.05] 2 8000 [3775] 378 [10716] 650 [294.8] 690 [313]

150YAZ 3-60-575 7.7 54 2 20 25 25 32.88 [3.05] 2 8000 [3775] 378 [10716] 650 [294.8] 690 [313]
180CAZ 3-60-208/230 25/25 164 7.2 64/64 70/70 80/80 40.38 [3.75] 2 12000 [5663] 506 [14345] 746 [338.4] 786 [356.5]

180DAZ 3-60-460 12.2 100 4.2 32 35 40 40.38 [3.75] 2 12000 [5663] 506 [14345] 746 [338.4] 786 [356.5]

180YAZ 3-60-575 9 78 3 24 30 30 40.38 [3.75] 2 12000 [5663] 506 [14345] 746 [338.4] 786 [356.5]
240CAZ 3-60-208/230 33.3/33.3 239 7.2 83/83 100/100 110/110 40.38 [3.75] 3 12000 [5663] 655 [18569] 952 [431.8] 992 [450]

240DAZ 3-60-460 17.9 125 3.3 44 50 60 40.38 [3.75] 3 12000 [5663] 655 [18569] 952 [431.8] 992 [450]

240YAZ 3-60-575 12.8 80 2.4 32 35 40 40.38 [3.75] 3 12000 [5663] 655 [18569] 952 [431.8] 992 [450]

6

S

T-A08

CONTROL BOX END

DIMENSIONS — 10 TONS

FIGURE 2

HIGH VOLTAGE
13⁄4 DIA. HOLE

OW VOLTAGE

L

7

IA. HOLE

⁄8 D

60.625

8.375

3

7.552

31.333

8.333

2

16.245

11.245

LIQUID LINE

5

⁄8 DIA.

UCTION LINE

S

3

IA.

⁄8 D

1

8.739

.802

7

BOTTOM VIEW

10 TONS

44.750

4

1

.

2

3

9

.9

4

6

ST-A0890-11

7

DIMENSIONS — 12.5 TON UNITS

ST-A0890-12

FIGURE 3

2.375

7

39.
94

BOTTOM VIEW

12.5 TONS

38.375

44.750

9

8

.

3

7

8

DIMENSIONS — 15 TO 20 TON UNITS

ST-A0890-13

FIGURE 4

7.375

8

3

9

.

9

4

BOTTOM VIEW

RAWL-180 & 240

8.375

3

44.750

8

8

.

8

8

9

CONTROL BOX CONFIGURATION

FIGURE 5

TRANSFORMERCONTACTORGROUND LUG

TIME DELAY
CONTROL

*

*

*

*

POWER BLOCK RELAY

*NOT REQUIRED ON SINGLE COMPRESSOR 10 TON UNIT. (120)

INSTALLATION

CRANKCASE HEATERS

These units are equipped with a crankcase heater. These crankcase heaters
are factory wired in such a manner that they are in operation whenever the
main power supply to the unit is “on” and compressors are “off.” Before starting
the equipment after prolonged shut-down or at the time of initial spring start-up,
be sure that the circuits to the condensing units are closed for at least 12 hours.

CORROSIVE ENVIRONMENT

The metal parts of this unit may be subject to rust or deterioration if exposed to
a corrosive environment. This oxidation could shorten the equipment’s useful
life. Corrosive elements include salt spray, fog or mist in seacoast areas, sul­phur or chlorine from lawn watering systems, and various chemical contami­nants from industries such as paper mills and petroleum refineries.

If the unit is to be installed in an area where contaminants are likely to be a
problem, special attention should be given to the equipment location and expo­sure.

• Avoid having lawn sprinkler heads spray directly on the unit cabinet.

• In coastal areas, locate the unit on the side of the building away from the
waterfront.

• Shielding provided by a fence or shrubs may give some protection, based on
clearances recommended in this book.

Regular maintenance will reduce the build-up of contaminants and help to pro­tect the unit’s finish.

STRAP

A0890-14

10

WARNING

!

DISCONNECT AL L POWER TO UNIT BEFORE STARTING
MA INTENANCE. FAILURE TO DO S O CA N CAUSE ELECTRI CAL
SHOCK RESULTING IN SEVERE PERSONAL INJURY OR DEATH.

• Frequent washing of the cabinet, fan blade and coil with fresh water will
remove most of the salt or other contaminants that build up on the unit.

• Regular cleaning and waxing of the cabinet with a good automobile polish will
provide some protection.