Tecumseh CDU4542EXG-S, CDUS4538EXCS-S, CDU4524EGF-S, CDUS4524EGE-S, CDU4538EGF-S Installation Instructions Manual

Outdoor Condensing Units

www.Tecumseh.com

INSTALLATION
INSTRUCTION
MANUAL

2

TABLE OF CONTENT

03

ODCU NOMENCLATURE, ODCU EXPLODED VIEW AND SCOPE OF SUPPLY

4-6

DIMENSIONS OF THE UNIT AND INSTALLATION INSTRUCTIONS

06

UNPACKING, LIFTING & HANDLING INSTRUCTIONS

ODCU MOUNTING OPTIONS

07

ODCU SERIAL/TECH SPEC. LABEL LOCATION

08

ELECTRICALS AND WIRING DIAGRAMS

9-10

CONNECTIONS OF SUCTION & LIQUID LINE AND REFRIGERANT PIPING.

11

PRESSURE CONTROLS (MINI PRESSURE SWITCHES)

11

SYSTEM FLUSHING, PURGING, AND PRESSURE TESTING FOR LEAKS

12- 13

SYSTEM EVACUATION AND SYSTEM CHARGING

14

15

APPROVED HERMETIC COMPRESSOR OILS

SYSTEM START-UP PROCEDURE

15

16

OPERATIONAL CHECKOUT PROCEDURE

MAINTENANCE (ODCU) AND TROUBLE SHOOTING

16-17

A, COMPRESSOR NOT STARTING – NOT HUMMING.

18

B, COMPRESSOR NOT STARTING HUMS BUT TRIPS ON THERMAL
PROTECTOR

18

C. COMPRESSOR STARTS AND RUNS, BUT SHORT CYCLES ON
THERMAL PROTECTOR

18

D. UNIT RUNS OK BUT RUN CYCLE IS SHORTER THAN NORMAL
(DUE TO HP/LP CUT OUT SWITCHES)

19

16-17

REFRIGERATION ACCESSORIES AND OPERATIONAL CHECKOUT
PROCEDURE

19-20

INSTRUCTIONS FOR THE SIGHT GLASS SOLDER TYPE AND
STACKING OF THE UNIT

21- 23

C D U

OUTDOOR TYPE

CONDENSING UNIT

S- SINGLE PHASE

NO LETTER- THREE

PHASE

APPLICATION
2 - LOW BACK
4 - HIGH BACK

CAPACITY

NO. OF DIGITS IN

COOLING CAPACITY

REFRIGERANT

E- R22

Z- R4040A

ACCESSORIES

S- STANDARD

FB- FULLY BUILT

CAPACITY

FIRST TWO DIGITS IN

COOLING CAPACITY

38000 BTU/HR @ 60 HZ

VOLTAGE

CODES

XG, XC, GH,...

S XXXXE

38

5

4

3

ODCU NOMENCLATURE

ODCU EXPLODED VIEW

ODCU PARTS LIST

CONDENSER COIL

RIGHT PANEL

ELECL. COVER/LIFT HANDLE

FRONT PANEL

FAN GRILL

FAN MOTER WITH BLADER

RECEIVER

COMPRESSOR

FILTER DRIER

SIGHT GLASS

SOLENOID VALVE

SUCTION SERVICE VALVE

LIQUID SERVICE VALVE

HP / LP SWITCH

TOP PANEL

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

SCOPE OF SUPPLY

CDUS XXXX X XXX-S ( STANDARD)

CDUS XXXX X XXX-FB ( FULLY BUILT)

TYPES OF MODELS RECEIVER FILTER DRIER SIGHT GLASS LLSV HP/LP SWITCH SERVICE VALVES

RECEIVER

S.N.

4

DIAGRAM - 1

DIAGRAM

LENGTH HEIGHT WIDTH

HORIZONTAL

MOUNTING

PITCH

SUCTION LINE

FLARE NUT

TYPE

WEIGHT

KGS

1

670 607 300 520

1/2"

53

1

670 607 300 520

1/2"

53

1

1

670 607 300 520

5/8"

53

670 607 300 520

5/8"

53

"A" "B" "C" "D"

DIMENSIONS ARE IN MM

DIMENSIONS & MINIMUM WALL
CLEARANCES SUGGESTED FOR INSTALLATION

UNIT MODEL

CDUS4524EGE-S

CDU4532EGF-S

CD454532EGH-S

CDU4524EGF-S

LIQUID LINE

FLARE

NUT TYPE

1/4"

1/4"

3/8"

3/8"

UPTO VERTICAL

MOUNTING

PITCH

328

328

328

328

"E”

5

DIAGRAM

LENGTH HEIGHT WIDTH

HORIZONTAL

MOUNTING

PITCH

SUCTION LINE

FLARE NUT

TYPE

WEIGHT

KGS

"A" "B" "C" "D"

DIMENSIONS ARE IN MM

UNIT MODEL

CDUS4538EXCS-S

CDU4538EGF-S

CDU4542EXG-FB

CDU4542EXG-S

LIQUID LINE

FLARE

NUT TYPE

UPTO VERTICAL

MOUNTING

PITCH

"E”

DIAGRAM - 2

2

975 810 400 675 395

5/8" 3/8"

68

2

975 810 400 675 395

*5/8" 3/8"

75

2

975 810 400 675 395

5/8" 3/8"

68

2

975 810 400 675 395

5/8" 3/8"

68

CDUS4538EXC-FB

2

975 810 400 675 395

*5/8" 3/8"

75

CDU4538EGF-FB

2

975 810 400 675 395

*5/8" 3/8"

75

* ADAPTOR NUT 3/4 TO 5/8

6

INSTALLATION INSTRUCTIONS

TO PROPERLY LOCATE THESE OUTDOOR CONDENSING UNITS, CAREFULLY
CONSIDER THESE IMPORTANT FACTORS:

UNPACKING, LIFTING/HANDLING INSTRUCTION

Weight Of The Unit. If units are installed on the roof, their weight and weight

distribution should be checked against the building specifications and the building
codes.

Distance Of The Unit to the refrigerated cabinet and power supply socket.

Space Around The Unit and in between adjacent units. This should consider

prevention of the re-circulation of the air and ensure enough airflow through the unit.
(Refer Drg.1 in page no. 4)

These distances should also provide enough room around the units so that
enclosure panels may be removed and that adequate accessibility is provided to the
compressor, electrical boxes and other controls for maintenance.

Orientation of the units should consider the prevailing wind direction. It is
recommended not to position the units in such a way that the airflow direction
through the unit faces to prevailing wind direction for the area. The units should be
mounted securely on adequate rigid and leveled bases, to avoid improper
lubrication conditions for the compressor. Never use the shipment pallet as a
permanent mounting base. If vibrations is a concern, then proper vibration insulators
should be installed under the mounting base.

Don’t remove the carton box until the unit arrives at the destination.

Verify the shipping symbols on the packing box are in right direction.

Cut the packing straps and remove the packing carton box.

(refer the Picture-1 Picture-2)

While lifting proper measures should be taken to protect the enclosure panels.

Always keep the unit upright, laying the unit on its side or top may cause

the unit damage.

Care should be taken to locate the center of gravity of the unit before lifting,
as the compressor is the heaviest part of the unit may not be located in the

center of the unit base.

Never lift or displace the units with enclosure panels removed.

A ll the panels should be in place and properly tightened.

7

ODCU MOUNTING OPTIONS.

7.1 FLOOR MOUNTING:

Make a concrete platform to the mounting dimension of M8 anchor bolt 4 Nos with M8
Plain washers.

Base surface should be leveled properly. (for mounting pitch dimensions refer
drawing.No. 1 & 2 on the page No. 4 & 5 of this booklet)

8

7.2 WALL MOUNTING:

ODCU unit can be mounted on the wall by using the M.S.Angle L – 2’x2’x8’ Frame
and fix to the wall.

M.S.Angle L – 2’x2’x8’ Frame not in the manufacturer’s scope of supply.

ODCU SERIAL/SPEC. LABEL & LOCATION

OUTDOOR

CONDENSING UNIT (CDU)

TECUMSEH PRODUCTS INDIA PVT.LTD
BALANAGAR TOWNSHIP, BALA NAGAR

www.tecumsehindia.com

CDU4542EXG-S

AWS4542EXG

3 Ph - 400 V - 50 Hz

35660

6.8

3635

R- 22 / 3500g

26.7 / 18.8

0.65 / 2.6

900x360x805

1059x500x875

68

CDU Model
Compressor Model

Power Supply

Cooling Capacity (btu/hr)

Nominal Current (a)

Power Input (w)

Max. Refrigerant Chargable

HP Pr. Switch Cut In/cut Out (Bar)

LP Pr. Switch Cut In/Cut Out ( Bar )

Outdoor Unit Dimension (mm)

Packing dimension (mm)

Outdoor Unit Weight ( kg )

Main power supply should always be disconnected and locked off to avoid accidental start up or electric
shock. Failure to do so could result in injury or death.

Some parts like condenser fins or some corners on the sheet metal parts are sharp and may potentially
cause injury. Use extra caution

WARNING