McQuay RCM20D User manual

CEILING/FLOOR

EXPOSED CONVERTIBLE

SPLIT TYPE AIR CONDITIONERS

INSTALLATION MANUAL

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1-1

English

This manual provides the procedures of installation to ensure a safe and good standard of operation for the air

conditioner unit.

Special adjustment may be necessary to suit local requirements.

Before using yourair conditioner, please read this instruction manual carefully and keep it for future reference.

INSTALLATION MANUAL

Part No.: A08019003071

COOLING UNIT

Reference Model

CE20D

SL20B

CE25D

SL25B

CE30D

SL30C

CE40D

SL40C

CE50D

SL50C

HEAT PUMP UNIT

Reference Model

CE20DR

SL20BR

CE25DR

SL25BR

CE30DR

SL30CR

CE40DR

SL40CR

CE50DR

SL50CR

Model

RCM20D / MCM020D / YCE20D / LXCM20D

ALC20B / MLC020B / YSL20B / LXLC20B

RCM25D / MCM025D / YCE25D / LXCM25D

ALC25B / MLC025B / YSL25B / LXLC25B

RCM30D / MCM030D / YCE30D / LXCM30D

ALC30C / MLC030C / YSL30C / LXLC30C

RCM40D / MCM040D / YCE40D / LXCM40D

ALC40C / MLC040C / YSL40C / LXLC40C

RCM50D / MCM050D / YCE50D / LXCM50D

ALC50C / MLC050C / YSL50C / LXLC50C

Model

RCM20DR / MCM020DR / YCE20DR / LXCM20DR

ALC20BR / MLC020BR / YSL20BR / LXLC20BR

RCM25DR / MCM025DR / YCE25DR / LXCM25DR

ALC25BR / MLC025BR / YSL25BR / LXLC25BR

RCM30DR / MCM030DR / YCE30DR / LXCM30DR

ALC30CR / MLC030CR / YSL30CR / LXLC30CR

RCM40DR / MCM040DR / YCE40DR / LXCM40DR

ALC40CR / MLC040CR / YSL40CR / LXLC40CR

RCM50DR / MCM050DR / YCE50DR / LXCM50DR

ALC50CR / MLC050CR / YSL50CR / LXLC50CR

CEILING/FLOOR EXPOSED CONVERTIBLE SPLIT TYPE AIR

CONDITIONER

MODEL

IM-CED-1099-1

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SAFETY PRECAUTIONS

Before installing the air conditioner unit, please read the following safety precautions carefully.

Warning

• Installation and maintenance should be performed by qualified persons who are familiar with local code and

regulation, and experienced with this type of appliance.

• All field wiring must be installed in accordance with the national wiring regulation.

• Ensure that the rated voltage of the unit corresponds to that of the name plate before commencing wiring work

according to the wiring diagram.

• The unit must be GROUNDED to prevent possible hazard due to insulation failure.

• All electrical wiring must not touch the refrigerant piping, compressor and any moving parts of the fan motors.

• Confirm that the unit has been switched OFF before installing or servicing the unit.

IMPORTANT

DO NOT INSTALLOR USE THE AIR CONDITIONER UNIT IN A LAUNDRY ROOM.

CONTENTS

- Safety Precautions page 2

- Air Conditioner Parts Description page 3

- Outline And Dimensions page 3

- Installation Of Indoor Unit page 5

- Installation Of Outdoor Unit page 7

- Refrigerant Piping page 7

- Electrical Wiring Connection page 9

- Vacuuming And Charging page 12

- Additional Charge page 12

- Air Conditioner Unit Operation page 13

- Standard Operating Conditions page 13

- Auto Random Re-start Function page 13

- Service And Maintenance page 14

- Trouble Shooting page 14

Caution

Please take note on the following important points when installing.

• Do not install the unit where leakage of flammable gas may occur.

If gas leaks and accumulates around the unit, it may cause fire ignition.

• Ensure that the drainage piping is connected properly.

If the drainage piping is not connected properly, it may cause water leakage which will dampen the

furniture.

• Do not overcharge the unit.

This unit is factory pre-charged. Overcharge will cause over-current or damage to the compressor.

• Ensure that the unit panel is closed after service or installation.

Unsecured panel will cause unit to operate noisily.

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English

AIR CONDITIONER PARTS DESCRIPTION

INDOOR UNIT

AIR DISCHARGE LOUVER

OUTDOOR UNIT

AIR INTAKE

AIR DISCHARGE NOZZLE

REFRIGERANT

PIPING

SIGNAL RECEIVER

INDICATOR LIGHTS

AIR DISCHARGE GRILLE

AIR INTAKE GRILLE

AIR FILTERS

(INSIDE AIR INTAKE GRILLE)

OUTLINEAND DIMENSIONS

INDOOR UNIT (CE D SERIES)

AIR INTAKE

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MODEL 20 25 30 40 50

A1174 1174 1174 1674 1674

B75 75 75 75 75

C1082 1082 1082 1582 1582

D68 68 68 68 68

E58 58 93 93 93

F156 156 156 156 156

G1214 1214 1214 1714 1714

H57 57 57 57 57

I670 670 670 670 670

J216 216 216 216 216

K319 319 319 319 319

L879 879 879 1379 1379

M517 517 517 517 517

OUTDOOR UNIT

SL SERIES

MODEL A B C D E F G H J K L M N P Q R

SL 20B/20BR

SL 25B/25BR 840 646 330 297 309 626 46 90 64 177 106 408 378 124 492 78.5

SL 30B/30BR

SLC SERIES

All dimensions are in mm.

Sharp edges and coil surfaces are potential locations which may cause injury

hazards. Avoid from being in contact with these places.

Caution

All dimensions in mm.

MODEL A B C D E F G H

SL30C/40C/50C

30CR/40CR/50CR 1030 850 400 448 141.5 746.5 50 85

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FIGURE B

Please ensure that the following steps are taken:

• Check the gradient for drainage flow as recommended

in Figure B.

• Provideclearance for easy servicing and optimal air flow

as shown in Figure C.

• The indoor unit must be installed such that there is no

short circuit of the cool discharge air with the warm

return air.

• Do not install the indoor unit where there is direct

sunlight shining on the unit. The location should be

suitable for piping and drainage installation. The unit

must be a large distance away from the door.

FIGURE A

PRELIMINARY SITE SURVEY

• Electrical supply and installation shall conform to the

local authority (e.g. National Electrical Board).

• Voltage supply fluctuation must not exceed ±10% of the

rated voltage. Electricity supply lines must be

independent of welding transformers which can cause

high supply fluctuation.

• Ensure that the installation location is convenient for

wiring and piping.

STANDARD MOUNTING

Ensure that the overhead supports are strong enough to hold

the weight of the unit. Position the hanger rods (wall

mounting bracket for floor standing), and check for its

alignment with the unit as shown in Figure A. Also, check

that the hangers are secured and the base of the fan coil unit

is leveled in both horizontal directions, taking into account

the gradient for drainage flow as recommended in Figure B.

INSTALLATION OF THE INDOOR UNIT

MODEL

20 25 30 40 50

A1214 1214 1214 1714 1714

B666 666 666 666 666

C273 273 273 273 273

D130 130 130 130 130

E1160 1160 1160 1560 1560

F27 27 27 27 27

G77 77 77 77 77

H745 745 745 1235 1235

I25 25 25 25 25

J209 209 209 331 331

K486 486 486 486 486

L108 108 108 108 108

M360 360 360 600 600

10.0mm

10.0mm LOWER

Note: Floor standing installation available for CE20D/DR

and CE25D/DR only.

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FIGURE D

SEMI-ENCLOSE MOUNTING

• In case the unit is to be half-recessed into a false ceiling, please check that the unit is well-aligned.

• Provide the installation space as shown in figure D.

CEILING TYPE

FIGURE C

FLOOR STANDING TYPE

CEILING BOARD TOP PANEL OF UNIT

UTENSILS, FURNITURES OR BUILT-IN

ARCHITECTURAL FEATURES MUST

NOT PROTRUDE MORE THAN 250.0MM

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OBSTACLE

SERVICE ACCESS

INSTALLATION OF THE OUTDOOR UNIT

The outdoor unit must be installed in such a way, so as to

prevent short circuit of the hot discharged air or obstruction

to the smooth air flow. Please follow the installation clear-

ance shown in the figure. Select the coolest possible place

where intake air temperature is not greater than the outside

air temperature (maximum 45°C).

Installation clearance

Note : If there is any obstacle higher than 2m, or if there is

any obstruction at the upper part of the unit, please allow

more space than the figure indicated in the above table.

Dimension A B C D

Minimum

Distance (mm) 300 1000 300 500

REFRIGERANT PIPING

MAXIMUM PIPE LENGTH AND MAXIMUM NUMBER OF BENDS

If the pipe length is too long, both the capacity and the

reliability of the unit will decrease.As the number of bends

increases, resistance of the piping system to the refrigerant

flow increases and thus lowering the capacity, as a result

the compressor may become defective. See Figure O and

Figure P.

ELEVATION

OUTDOOR UNIT

PIPING LENGTH

INDOOR UNIT

FIGURE O

INDOOR UNIT

MAXIMUM

PIPING 20m

MAX. ELEVATION HEIGHT

MODEL 20 25 30 40 50

Maximum Length (m)

15 15 20 20 20

Maximum Elevation (m)

8 8 10 10 10

Maximum Number of Bends

10 10 10 10 10

Therefore, always select the shortest path for the piping

system and follow the recommendations as tabulated in the

table.

FIGURE P

RETURN AIR

DISCHARGE AIR

RETURN AIR

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REMOVE BURR

SPANAR TORQUE WRENCH

INDOOR PIPING FLARE NUT

FLARED TUBEFLARE JOINT

COPPER TUBE

SWAGING BLOCK

Ø TUBE A (mm)

Inch mm Imperial Rigid

1/4" 6.35 1.3 0.7

3/8" 9.52 1.6 1.0

1/2" 12.70 1.9 1.3

5/8" 15.88 2.2 1.7

3/4" 19.05 2.5 2.0

CUTTING COPPER TUBE

PIPING CONNECTION TO THE UNITS

• Align the center of the piping and tighten the flare nut

sufficiently with fingers.

• Finally, tighten the flare nut with the torque wrench

until the wrench clicks.

PIPE SIZE (mm/in) TORQUE (Nm)

6.35 (1/4) 18

9.53 (3/8) 42

12.7 (1/2) 55

15.88 (5/8) 65

19.05 (3/4) 78

• If any brazing work is required, ensure that the nitrogen

gas is passed through coil and joints while the brazing

work is being done. This will eliminate soot formation

on the inside walls of the copper tubings.

• Cut the connection pipe with a pipe cutter.

• Remove burrs from cut edges of the pipes with remover.

Hold the end of the pipe downwards to prevent metal

chips from entering the pipe.

• Insert the flare nuts, mounted on the connection parts of

both the indoor unit and outdoor unit onto the copper

pipes.

• Flare the pipe with extra length above the flaring tool as

shown in the table.

• The flared edge must be even and not cracked or

scratched.

PIPING WORKS

• Do not use contaminated or damaged copper tubing. Do not remove plastic, rubber plugs and brass nuts from the valves,

fittings, tubings and coils until you are ready to connect suction or liquid line into valves or fittings.

1/4t

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English

ELECTRICALWIRING CONNECTION

ELECTRICALWIRING CONNECTION FOR CE 20D/25D/30D

IMPORTANT: These values are for information only, they should be checked and selected to comply with the local and/or

national codes and regulations. They are also subjected to the type of installation and size of

conductors used.

Model 40D 50D

Voltage range 380V – 415V/3Ph/50Hz + !

Power Supply Cable size mm22.5 2.5

Number of conductors 55

Interconnection Cable size mm21.5 1.5

Number of conductors 44

Recommended fuse A 15 20

ELECTRICALWIRING CONNECTION FOR CE 40D/50D

The electrical power must be provided with

protection devices (circuit breaker or fuse)

with double pole separation system (phase +

neutral) with minimum contact gap of 3mm.

TERMINAL STRIP

INDOOR UNIT

INTERCONNECTION

CABLE TERMINAL STRIP

OUTDOOR UNIT

COMP

Model 20D 25D 30D

Voltage range 220V – 240V/1Ph/50Hz + !

Power Supply Cable size mm22.5 2.5 4

Number of conductors 333

Interconnection Cable size mm22.5 2.5 2.5

Number of conductors 334

Recommended fuse A 16 20 25

CE20D/25D

COMP

TERMINAL

STRIP

INDOOR

UNIT

INTERCONNECTION CABLE CAPACITOR

TERMINAL

STRIP

OUTDOOR

UNIT

The electrical power must be provided with

protection devices (circuit breaker or fuse)

with double pole separation system (phase +

neutral) with minimum contact gap of 3mm.

POWER SUPPLY

CABLE

IMPORTANT: These values are for information only, they should be checked and selected to comply with the local

and/or national codes and regulations. They are also subjected to the type of installation and size of con-

ductors used.

CE30D

POWER SUPPLY

CABLE

CED1099 (01~09/E) 2/1/01, 3:47 PM9

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