installation and maintenance manual im818 - daikin...

IM 818

MCK Ceiling Cassette Ductless Split Type Air Conditioner

Installation and Maintenance Manual IM818

Group: Unitary

Part Number: IM818

Date: March 2005

© 2005 Daikin

Indoor Unit Wireless RemoteControl (Standard)

Outdoor Unit Wired WallControl (Optional)

IM 818

Table of ContentsModel Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2Cooling Only . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2Cooling/Heat Pump . . . . . . . . . . . . . . . . . . . . . . . . . . 2General Information . . . . . . . . . . . . . . . . . . . . . . . . . 3Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . 3Unit Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4Indoor Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4Outdoor Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4Installation Guidelines . . . . . . . . . . . . . . . . . . . . . . . 5Installation Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . 5Installation of Outdoor Unit . . . . . . . . . . . . . . . . . . . . . 5Installation of the Indoor Unit. . . . . . . . . . . . . . . . . . . . 5Drain Piping. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6Drain Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6Condensate Pump. . . . . . . . . . . . . . . . . . . . . . . . . . . . 6Water Level Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . 6Front Panel Installation . . . . . . . . . . . . . . . . . . . . . . . . 6Air Intake Grille Installation . . . . . . . . . . . . . . . . . . . . . 7Refrigerant Tubing . . . . . . . . . . . . . . . . . . . . . . . . . . 8Tubing Length & Elevation . . . . . . . . . . . . . . . . . . . . . 8Tubing Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . 8Tubing Connection To Units . . . . . . . . . . . . . . . . . . . . 8Electrical Connections . . . . . . . . . . . . . . . . . . . . . . . 9Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Evacuating and Charging. . . . . . . . . . . . . . . . . . . . 17Evacuating the tubing and the indoor unit. . . . . . . . . 17Additional charge . . . . . . . . . . . . . . . . . . . . . . . . . . . 17Charge operation . . . . . . . . . . . . . . . . . . . . . . . . . . . 17Remote Controller Operation Guide . . . . . . . . . . . 18Wired Wall Control (Optional) . . . . . . . . . . . . . . . . 19Special Features . . . . . . . . . . . . . . . . . . . . . . . . . . 20Dry mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20Heat mode (heat pump only) . . . . . . . . . . . . . . . . . . 20Overheating protection (heat pump only) . . . . . . . . . 20Frost prevention . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20Fan speed and rated cooling capacity . . . . . . . . . . . 20Operating Conditions . . . . . . . . . . . . . . . . . . . . . . 20Cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20Overall Checking . . . . . . . . . . . . . . . . . . . . . . . . . . . 20Unit Indicator Lights . . . . . . . . . . . . . . . . . . . . . . . . 21IR signal receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . 21Wireless Remote Control . . . . . . . . . . . . . . . . . . . . . 21Mode and Diagnostic Chart . . . . . . . . . . . . . . . . . . . 21Startup After Extended Shutdown . . . . . . . . . . . . 22Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . 22Service and Maintenance . . . . . . . . . . . . . . . . . . . 23

Model NumbersCooling Only

Cooling/Heat Pump

Indoor Unit Outdoor Unit Nominal Cooling - BTUHMCK20A MLC20B 21,000MCK25A MLC25B 25,000MCK30A MLC30C 30,000MCK40A MLC40C 40,000MCK50A MLC50C 50,000

Indoor Unit Outdoor Unit Nominal Cooling - BTUH Nominal Heating - BTUHMCK20AR MLC20BR 20,000 20,000MCK25AR MLC25BR 25,000 25,000MCK30AR MLC30CR 30,000 31,000MCK40AR MLC40CR 40,000 41,000MCK50AR MLC50CR 48,000 50,000

IM 818

General InformationThis manual provides the installation procedures so your air conditioner unit operates properly and pro-vides you the service it was designed to provide.Special adjustment may be necessary to suit local requirements. Before using your air conditioner, please read this instruction manual carefully and keep it for future reference.

Safety PrecautionsBefore installing the air conditioner unit, please read the fol-lowing safety precautions carefully.

.

WARNING

• The installer must determine and follow all applicablecodes and regulations. This equipment presents hazardsof electricity, rotating parts, sharp edges, heat andweight. Failure to read and follow these instructionscan cause property damage, equipment damage, severepersonal injury or death. This equipment must beinstalled by experienced, trained personnel only.

• Do not allow flammable fumes near unit or areas shar-ing ventilation.

• Installation and maintenance must be performed byqualified persons who are familiar with local code andregulation, and experienced with this type of appliance.

• All field wiring must be done in accordance withindustry standards and local codes.

• Inspect the unit nameplate to be certain the voltage isthe same as the voltage that will be delivered to theunit. Improper electrical wiring can cause propertydamage, sever personal energy or death.

• The unit must be GROUNDED.

• Make sure wiring does not touch refrigerant piping,compressor, or any moving parts of the fan motors.

• Confirm that the power supply is switched OFF beforeinstalling or servicing the unit.

WARNING

Hazardous Voltage!

Disconnect all electrical power including remotedisconnects before servicing. Failure to disconnectpower before servicing can cause severe personalinjury or death.

CAUTION

Use copper conductors only. Unit terminals are notdesigned to accept other types of conductors. Failure todo so can cause damage to the equipment.

CAUTION

• Do not install in a laundry room. Humidity and laundrychemicals can corrode unit components.

• Do not install the unit where leakage of flammable gasmay occur. If gas leaks and accumulates around theunit, it can cause a fire.

• Connect drainage piping properly. If drainage piping isnot connected properly, water leakage can cause prop-erty damage.

• Do not overcharge the unit. This unit is factory pre-charged. Overcharge will cause over-current or damage to the compressor.

• Keep panel closed. Unsecured panels will cause theunit to operate noisily.

NOTICE

This product was carefully packed and thoroughlyinspected before leaving the factory. Responsibility forits safe delivery was assumed by the carrier uponacceptance of the shipment. Claims for loss or damagesustained in transit must therefore be made upon thecarrier, as follows:VISIBLE LOSS OR DAMAGEAny external evidence of loss or damage must be notedon the freight bill or carrier’s receipt, and signed by thecarrier’s agent. Failure to adequately describe suchexternal evidence of loss or damage may result in thecarrie’s refusing to honor a damaged claim. The formrequired to file such a claim will be supplied by thecarrier.CONCEALED LOSS OR DAMAGEConcealed loss or damage means loss or damagewhich does not become apparent until the product hasbeen unpacked. The contents may be damaged intransit due to rough handling even though the cartonmay not show external damages. When the damage isdiscovered upon unpacking, make a written request forinspection by the carrier’s agent within fifteen (15)days of the delivery date. File a claim with the carriersince such damage is the carrier’s responsibility.

IM 818

Unit DimensionsIndoor UnitModel: MCK20, 25, 30, 40, 50 A/AR

Outdoor UnitModel: MLC20 & 25B/BR, MLC30, 40 & 50C/CR

Note: See Figure 3 For More Detail

32 1/4”

32 1/4”

14 3/4”

13 3/4”

36 5/8”

36 5/8”

Front Panel

Frame

Frame andFront Panel

Model MLC 20 & 25 B/BR 30, 40 & 50C/CRA 16" 19 1/4"B 33" 40 1/2"C 25 1/2" 33 1/2"D 2 1/4" 3 1/2"E 13 1/4" 15 3/4"F 23 1/4" 29 3/8"G 4 7/8" 5 1/2"H 5/8" 3/4"J 3/4" 1"K 2" 2"

E

D

B

F

A

C

G

J

H

K

Electrical AccessPanel w/ 7/8” Knockout

RefrigerantPiping Connections

IM 818

Installation GuidelinesInstallation Diagram

Installation of Outdoor UnitInstall the outdoor unit in a manner to prevent mixing hotdischarged air with return air flow. Also, the unit should be asuitable distance from obstructions (See Figure 1) for instal-lation clearances. Double the dimensions shown if surround-ings are more than 72" tall, or if there is an obstruction ontop. Select the coolest possible place where intake air tem-perature is not greater than the outside air temperature (maxi-mum 113°F).

Figure 1. Outdoor Unit Minimum Clearances

Installation of the Indoor UnitElectrical wiring and installation must conform to all nationaland local codes.Voltage supply fluctuation must not exceed 10% of ratedvoltage.Ensure that the location is convenient for wiring, piping anddrainage.The indoor unit must be installed near the center of the roomwith no obstacles in path of the discharge or return air. SeeFigure 2 for minimum clearances.The suspending structure must be stronge enough to avoidamplifying noise and vibration.The height above the finished ceiling must be 13 3/4" mini-mum (See Figure 4).Avoid excessive heat. Do not install close to steam or hotwater pipes.Figure 2. Indoor Unit Minimum Clearances

Locate and install four (4) 3/8" threaded hanging rods perdimensions shown in Figure 3. Each rod must be able to sup-port 50 lbs. minumum.The dimensions of the cardboard template match Figure 3.Figure 3. Looking Up at Unit in Ceiling

Air Intake

Air Discharge Nozzle

Air Intake

OUTDOOR UNIT

INDOOR UNIT

Wireless IRRemote Control

Front Panel

Air Filter(Behind the grille)

Air Discharge Louver (4)

3/4" OD Drain Connection

IR Receiver andLED Indicator Lights

Air Intake Grille

Refrigerant Tubingand Insulation

Frame

Line VoltageWiring

"L"

Optional WiredWall Control

12" 40"

12" 20"

Inta

ke A

ir

Dis

char

ge A

ir

Ser

vice

Acc

ess

Inta

ke A

ir

Obs

tacl

e

Obs

tacl

e

Obs

tacl

e

Obs

tacl

e

Obstacle

40" Min.

120" Max.

20" Min.

Floor

Front Panel

24 1/2" (Hanging Rods)

35" (Ceiling Opening)

5 1/4"

31"

(Hangin

g R

ods)

35"

(Ceili

ng O

penin

g)

5 1/4"

5 1/4" 5 1/4"24 1/2" (Hanging Rods)

31"

(Hangin

g R

ods)

32 1

/4"

(Unit

Siz

e)

32 1/4" (Unit Size)

2"

2"2"

2"

IM 818

Hang the unit on the rods using washers and locknuts.Adjust the unit height to 1" above the finished ceiling surfaceand level in all directions (See Figure 4).

Figure 4. Unit Hanging

Drain PipingDrain pipe must be pitched away from the unit for gooddrainage (See Figure 5).The outside diameter of the drain connection is 3/4". Useflexable coupling with 3/4" ID (See Figure 6) .Insulate drain pipe to prevent sweating.

Figure 5. Drain Piping

Drain TestConnect the flexible coupling to the drain pipe. Bend coupling upward and pour water in to check the pipingfor leakage (See Figure 6).When the test is completed, connect the flexible coupling tothe drain connection on the indoor unit.Figure 6. Drain Test

Condensate PumpThe condensate pump will be on whenever compressor is on.The pump will remain on for at least 5 minutes after the com-pressor stops. Max head is 27" H2O.

Water Level SwitchThis normally closed switch will open and turn off the com-pressor if the condensate level gets to high.

If it closes within 5 minutes, the compressor will turn backon. If the switch does not close for more than 5 minutes, thesystem will warn user regarding the fault and the compressoris not allowed to cut in. If the switch is confirmed openedtwice within 30 minutes, the compressor will stay off andindicator lights will show fault (See Mode and DiagnosticChart, page 21).

Front Panel InstallationOpen the air intake grille by pulling back the latches andremove it together with the filter from the panel (See Figure7).

Attach the front panel to the indoor unit with 4 screws. Makesure the seals contact the indoor unit to prevent air leakage(See Figure 9).

Figure 7. Front Panel Installation

10 1/2"8" 6 1/2"

1"Finished Ceiling Surface

1 1/2" Drain Line

Liquid LineGas Line

13 3/4"

Indoor Unit

Pipe Clamp

GOOD BAD

Pour Water In Here

FlexibleCoupling

Drain Pipe

OPEN

SCREW

IM 818

Plug the 2 electrical cords from the front panel into the 2matching connections inside the control box (See Figure 8).

Figure 8. Electrical Connection Front Panel to Control Box

Figure 9. Prevent Discharge Air Leakage

Air Intake Grille ReplacementReattach the air intake grille and filter to the front panel. Thegrille can swing in 4 directions. Position the grille to maxi-mize accessibility when open (See Figure 7).

From Front Panel

LED Connectors Control Box

Air Swing Connectors

� � � ��

� � � ��

� � � � �

� � � � �

� � � � � � � � �

� � � � � � � � �

� �

� �

� � � � � � � � �

� � � � � � � � � � �

� � � � � � � � � �

� � � � � � � � �

IM 818

Refrigerant TubingTubing Length & ElevationCopper tubing to connect the indoor and outdoor units is sup-plied by others or it can be ordered from the factory. SeeTable 1 for requirements.

Table 1: Refrigeration Tubing Requirements

Note: The refrigerant pre-charged in the outdoor unit is for tubing length "L" upto 25 ft. See "Installation Diagram" page 5. See Table 6 on page 17 for addi-tional R-22 refrigerant required on longer runs.

Tubing Preparation• Do not use contaminated or damaged copper tubing. Do

not remove plastic, rubber plugs or brass nuts from thevalves, fittings, tubings and coils until you are ready toconnect suction or liquid line into valves or fittings.

• If any brazing work is required, ensure that the nitrogengas is passed through coil and joints while the brazingwork is done. This will eliminate soot formation on theinside wall of the copper tubing.

• Cut the copper tubing with a tube cutter (See Figure 10).• Remove burrs from cut ends by holding tubing down-

wards to prevent metal chips from entering the tubing.• Slide flare nut on tubing.• Flare the tubing as shown in Figure 10, Figure 11 and

Table 2.• The flare must be even and not cracked or scratched.Figure 10. Cutting and Flaring Tube

Table 2: Tube Flaring Dimensions

Tubing Connection To Units• Connect the copper tubing to both the indoor and outdoor

units (See Figure 11).

• Torque each flare nut to specifications (See Table 3).

• Cover both tubes individually with 3/8" minimum wallthickness foam insulation.

Table 3: Flare Nut Torque Specifications

Figure 11: Flare Tubing Connection

Model Indoor MCK20A MCK25A MCK30A MCK40A MCK50A

Model Outdoor MLC20B MLC25B MLC30C MLC40C MLC50C

Max. Length, "L"- Ft. 49’ 49’ 115’ 115’ 115’

Max. elevation-Ft. 26’ 26’ 49’ 49’ 49’

Max. no. of bends 10 10 10 10 10

Liq. tube size - OD 1/4" 3/8" 3/8" 3/8" 3/8"

Gas tube size - OD 5/8" 5/8" 5/8" 3/4" 3/4"

Cutrting Copper Tube

1/4 Tube

Copper Tube

Flaring ToolSee Table 2

X

Tube Diameter - OD X (in.)Inch Imperial Rigid1/4 .051 .028

3/8 .063 .039

5/8 .087 .067

Tube Size (in.) Torque (ft./lb.)1/4 13.3

3/8 31.0

5/8 48.0

Flared Tube

Flare NutUnit Fitting

IM 818

Electrical Connections

• Wiring must be in accordance with all applicable electri-cal codes.

• Wires must not touch the refrigerant piping, compressoror any moving part.

• All electrical field wiring must be clamped at both theindoor unit and the outdoor unit.

Note: Field install 10A fuse in blue wire of outdoor unit asshown in wire diagrams for unit sizes 30, 40, and 50.

• See Table 4 and 5 for the number of wires, wire gage andfuse/circuit breaker size required.

• NEC requires an approved electrical disconnect withinsight of the unit so that anyone working on the unit canturn off the power and see that its not accidently turnedback on. This will require two disconnects, one by theoutdoor unit and one by the indoor unit.

Table 4: Wire, Fuse/Breaker Requirements - Cooling Only

Table 5: Wire, Fuse/Breaker Requirements - Heat Pump Only

* Not including the low voltage OD coil sensor cable.

WARNING

Improper installation can cause severe personal injuryor death . Wiring must be done by a qual if iedtechnician in compliance with local codes.

Unit Size 20 25 30 40 50Voltage - 60Hz. 1 Ph. 208/230

Power supply wire size 12 ga. 10 ga. 8 ga. 8 ga. 6 ga.

No. of 12 ga. wires between units 2 + gnd. 2 + gnd 3 + gnd 3 + gnd 3 + gnd

Fuse/Breaker size 20 amp. 25 amp. 35 amp. 40 amp. 55 amp.

Unit Size 20 25 30 40 50Voltage - 60Hz. 1 Ph. 208/230

Power supply wire size 12 ga. 10 ga. 8 ga. 8 ga. 6 ga.

No. of 12 ga. wires between units* 5 + gnd. 5 + gnd 6 + gnd 6 + gnd 6 + gnd

Fuse/Breaker size 20 amp. 25 amp. 35 amp. 40 amp. 55 amp.

IM 818

Wiring Diagrams

RETURN AIR SENSOR

INDOOR COIL SENSOR

ROOM

ID

OD

WIREDREMOTE

CONTROLLER

WIRELESSREMOTE

CONTROLLER

CN4 CN6

JH

RMODE

CN

3

TRANSFORMER

WATER LEVEL SWITCH

L

COMP.

N1

N2

LIVE4WV

DD

H

WTP AS LOW MED

HIG

H

RE

D RED BLACK

AS

BLUE BLUE BLA

CK

PURPLEORANGE

BROWN

FHFM

FL

WH

ITE

RE

D

A.C. I.C.

MC

FAN MOTOR

GREEN/YELLOWGREEN/YELLOW

COMP. N/L2

NOTE: DISCONNECT CN6 IF CN4 IS USED

KEY:---- - FIELD SUPPLY WIRINGAS - AIRSWING MOTORDP - DRAIN PUMP (CONDENSATE)

COMP.

WHITE

FANMOTOR BROWN

C

CMBLUE

DP

MODEL MCK 020/025A INDOOR UNIT- (COOLING ONLY)

MODEL MLC / M4L020/025B OUTDOOR UNIT

N

S

R

RED

TO OUTDOORDEFROST SENSOR

L/L1 N/L2

PU

RP

LE

BLACK

BLACK

RE

D

G/Y

L1L2}208/230V

60Hz

RED

BLUE BLUE

BLUE

GREEN/YELLOW

CAPACITOR

KEY:---- - FIELD SUPPLY WIRINGCM - COMPRESSOR MOTOR WITH INTERNAL OVERLOAD PROTECTOR

12 GA. WIRE

IM 818

RETURN AIR SENSOR

INDOOR COIL SENSOR

ROOM

ID

OD

WIREDWALL

CONTROLLER

WIRELESSREMOTE

CONTROLLER

CN4 CN6

JH

RMODE

CN

3

TRANSFORMERL

COMP.

N1

N2

LIVE4WV

DD

H

WTP AS LOW MED

HIG

H

PU

RP

LE

RE

D

RE

DRED BLACK

AS

BLUE BLUE BLA

CK

PURPLEORANGE

BROWN

FHFM

FL

WH

ITE

RE

D

A.C. I.C.

MC

FAN MOTOR


COMP.L/L1 N/L2



208-230V1 PH

L2

L1

10A

REDRED

BLUEREDRED

RED

R/L1S/L2 T/L3

U/T1V/T2 W/T3 A2

A1

BLACK

RED

BLUE

WHITE

COMP. L N

GR

EE

N/Y

ELL

OW

RE

D

BLU

E

WHITE RED

G/YFANMOTOR

BROWN

BROWN

C

R S

COMPRESSOR CRANKCASEHEATER

{

*NOTE: FIELD INSTALL 10A FUSE IN BLUE WIRE AS SHOWN

DP

MODEL MCK 030A INDOOR UNIT- (COOLING ONLY)

MODEL MLC / M4L030C OUTDOOR UNIT

S RL N

BLUE

*10A

RED

G/Y

HIGH / LOW PRESSURE SWITCH

RED REDRED

BLUEBLUE

MAGNETICCONTACTOR

S R

RED

RED

RED

12

A C


WATER LEVEL SWITCH

12 GA. WIRE

IM 818

RETURN AIR SENSOR

INDOOR COIL SENSOR

ROOM

ID

OD

WIREDWALL

CONTROLLER

WIRELESSREMOTE

CONTROLLER

CN4 CN6

JH

RMODE

CN

3

TRANSFORMERL

COMP.

N1

N2

LIVE4WV

DD

H

WTP AS LOW MED

HIG

H

PU

RP

LE

RE

D

RE

DRED BLACK

AS

BLUE BLUE BLA

CK

WHITEBLUE

YELLOW

FHFM

FL

WH

ITE

RE

D

A.C. I.C.

MC

FAN MOTOR


COMP.L/L1 N/L2



208-230V1 PH60Hz

L2

L1

10A

RE

D

RED

RED RED RED

RED

RED

RED

RED RED

RED

1L1 3L2 5L3

2T1 4T2 6T3

1

2 A2

A1

BLUE

BLACK

BLUE BLUE

RED

BLACK BLA

CK

BLUE

BLUEGREEN/YELLOW

PURPLE

PU

RP

LE

WHITE

COMP. L/L1 N/L2

GR

EE

N/Y

ELL

OW

RE

D

BLU

E

WHITE RED

G/YFANMOTOR

BROWN

BROWN

C

R S

COMPRESSOR

BLUE

CRANKCASEHEATER

LOWPRESSURE

SWITCH

HIGHPRESSURE

SWITCHLOCK OUT

RELAY

{

2

*10A


DP

MODEL MCK 40A/50A - (COOLING ONLY)

MODEL MLC 40C/50C

L/L1 N/L2

WATER LEVEL SWITCH

12 GA. WIRE

BLACK

IM 818

RETURN AIR SENSOR

INDOOR COIL SENSOR

ROOM

ID

OD

WIREDWALL

CONTROLLER

WIRELESSREMOTE

CONTROLLER

CN4 CN6

JH

RMODE

CN

3

TRANSFORMERL

COMP.

N1

N2

LIVE4WV

DD

H

WTP AS LOW MED

HIG

H

RE

D RED BLACK

AS

BLUE BLUE BLA

CK

PURPLEORANGE

BROWN

FHFM

FL

WH

ITE

RE

D

A.C. I.C.

MC

FAN MOTOR


COMP. N/L2



WH

ITE

FANMOTOR

CM

DP

MODEL MCK 020/025AR INDOOR UNIT- (HEAT PUMP)

MODEL MLC / M4L020/025BR OUTDOOR UNIT (HEAT PUMP)

L/L1 N/L2

PU

RP

LE

BLACK

BLACK

RE

DG/Y

GR

EE

N/Y

ELL

OW

KEY:---- - FIELD SUPPLY WIRINGCM -COMPRESSOR MOTOR4V - 4 WAY VALVETH2 - OUTDOOR THERMISTOR

OF4WV

BLU

E

BR

OW

N

COMP. NOF4WV

BLU

EB

LUE

BLACK

GR

EE

N/Y

ELL

OW

RED

RED

WHITE

BLACK4V

BLACK

BLACK

BROWN

BROWN

BLACK

BLUE

BLUE

C

R

S

TH2

LOW VOLTAGE CABLE TOOUTDOOR COIL SENSOR

L2L1

12 GA. WIRE

WATER LEVEL SWITCH

IM 818

RETURN AIR SENSOR

INDOOR COIL SENSOR

ROOM

ID

OD

WIREDWALL

CONTROLLER

WIRELESSREMOTE

CONTROLLER

CN4 CN6

JH

RMODE

CN

3

TRANSFORMERL

COMP.

N1

N2

LIVE4WV

DD

H

WTP AS LOW MED

HIG

H

PU

RP

LE

RE

DR

ED

RED BLACK

AS

BLUE BLUE

PURPLEORANGE

BROWN

FHFM

FL

WH

ITE

RE

D

A.C. I.C.

MC

FAN MOTOR

GREEN/YELLOW



208-230V1 PH60Hz

L2

L1

10A

REDRED

RED RED

21 L2 L3

22 T2 T3 A2

A1

BLUE

WHITE

COMP. L N

RE

D

BLU

E

C

R S

COMPRESSOR

{


DP

MODEL MCK 030AR INDOOR UNIT- (HEAT PUMP)

MODEL MLC / M4LC030CR OUTDOOR UNIT (HEAT PUMP)

A 4WVL N

BLUE *10A

RED

G/Y

HIGHPRESSURE SWITCH

RED

RED


OF

GREEN/YELLOW

COMP. N/L2L/L1 N/L2

BLACK

OF4WV

G/Y

A

BLU

E

BLA

CK

BR

OW

N

BLACK

L1

T1

13

14BLU

E

WH

ITE

WH

ITE

CRANKCASEHEATER

GREEN/YELLOW

WHITE

BLUE

BLUE

BR

OW

N

BR

OW

N

FANMOTOR

WH

ITE

BLA

CK

BLU

EB

LAC

K

RE

D

O/D

CO

IL S

EN

SO

R

4WV

BLA

CK

BLA

CK


WATER LEVEL SWITCH

12 GA. WIRE

IM 818

RETURN AIR SENSOR

INDOOR COIL SENSOR

ROOM

ID

OD

WIREDWALL

CONTROLLER

WIRELESSREMOTE

CONTROLLER

CN4 CN6

JH

RMODE

CN

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TRANSFORMERL

COMP.

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LIVE4WV

DD

H

WTP AS LOW MED

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FHFM

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MC

FAN MOTOR

GREEN/YELLOW


KEY:---- - FIELD SUPPLY WIRINGAS - AIR SWING MOTORDP - DRAIN PUMP (CONDENSATE)

208-230V1 PH60Hz

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2T1 6T3 2 A2

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DP

MODEL MCK 040AR/50AR INDOOR UNIT (HEAT PUMP)

MODEL MLC040CR/50CR

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HIGHPRESSURE SWITCH

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WATER LEVEL SWITCH

12 GA. WIRE

L N

L1 L2

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IM 818

CM

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KEY CM - COMPRESSOR MOTOR FM - OUTDOOR FAN MOTOR FSCM - FAN SPEED CONTROL MODULE

12 GA. WIRE BY OTHERS

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ORANGE

1 2 3 4 5

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OUTDOOR COIL SENSOR

(TO INDOOR UNIT)

MODEL : MLC 20B - 25B OUTDOOR UNIT - COOLING ONLY - OPTIONAL LOW AMBIENT KIT

OL

MODEL : MLC20BR - 25BR OUTDOOR UNIT - HEAT PUMP - OPTIONAL LOW AMBIENT KIT

FM CM

4 3 2 1

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COMP. N OF 4V

(TO INDOOR UNIT)

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IM 818

Evacuating and ChargingEvacuating the tubing and the indoor unitThe outdoor unit is pre-charged with refrigerant R-22. Theindoor unit and the refrigerant connection tubing must beevacuated as follows:

1. Remove the 3 caps from the valves on the outdoor unit.2. Connect the center of the charging gauge to the vacuum

pump.3. Connect the charging gauge to the service port of the

3-way valve (See Figure 13).4. Start the pump and evacuate to -760 mm Hg (-29.9" Hg).5. Close the valve of the changing gauge and stop the vac-

uum pump.6. On the outdoor unit, open both valves using a 4 mm

Allen wrench. (See Figure 12.)

Figure 12. 3-way Suction Valve on Outdoor Unit

Figure 13 Evacuation Schematic

Additional chargeThe refrigerant is pre-charged in the outdoor unit. If the tub-ing length ("L") between the indoor and outdoor unit is nomore than 25 ft., additional charge after evacuation is notnecessary. If the tubing length ("L") is more than 25 ft., useadditional R-22 as indicated in Table 6. (See Installation Dia-gram on page 5).

Table 6: Additional R-22 ounces per ft. (when tubing length "L" is more than 25 feet - see Installation Diagram on page 5)

Charge operationThis operation must be done by weighing the R-22 beingadded thru the service port on the 3 way suction valve. (SeeTable 6 and Figure 14.)

1. Remove the service port cap.2. Connect the low pressure side of the charging gauge to

the suction service port center of the cylinder tank andclose the high pressure side of the gauge. Purge the airfrom the service hose (See Figure 14).

3. Start the air conditioner unit.4. Open the gas cylinder and low pressure charging valve.5. When the required refrigerant quantity is pumped into

the unit, close the low pressure side and the gas cylindervalve.

6. Disconnect the service hose from service port. Put backthe service port cap.

Figure 14. Charging Schematic

Hex Socketfor 4 mmAllen wrench Flare Nut

RefrigerantTubing

ServicePort Outdoor Unit

3-way Valve

Indoor UnitLiquid side

Outdoor Unit

Close

Discharge Valve

Suction Valve

Close

Gas side

Vacuum Pump

HighPress.Low

Press.

Model Oz. Per Ft. Max. Length "L"-Ft.

20A .16 49’

25A .40 49’

30A .53 115’

40A .55 115’

50A .55 115’

20AR .16 49’

25AR .50 49’

30AR .53 115’

40AR .55 115’

50AR .55 115’

Indoor Unit Outdoor UnitLiquid side

Gas side

HighPress.

LowPress.

Discharge Valve

Suction Valve

IM 818

Remote Controller Operation GuideTransmission source• The source where the signal is

transmitted.

ON Timer Setting• Press the SET button will activate

the on timer function.

• Set the desired on time by pressingthe SET button continuously. If thetimer is set to 7.30am, the air con-ditioner will turn on at 7.30 sharp.

• Press the CLR button to cancel theon timer setting.

Fan Speed Selection• Press the button until the desired

fan option displays (auto, low,med. or high). "Auto" automaticallyselects high fan until room temper-ature is within 2oF of setting, thenswitches to low speed. Fan runscontinuous in Cool and cycles inHeat.

Signal Transmission Indication• Blinks to confirm the last setting

was sent to the unit.

On/Off Button• Press once to start the air

conditioner.

• Press again to stop the airconditioner.

Operation mode• Press the MODE button to select

the type of operating mode.

• For cooling only unit, the availablemodes are : COOL, DRY & FAN.

• For heat pump unit, the availablemodes are: AUTO, COOL, DRY,FAN & HEAT.

Temperature Setting• Set the desired room temperature

by pressing the buttons to increaseor decrease the set temperature.

• The temperature setting range isfrom 60°F to 86°F.

• Press both buttons simultaneouslyto toggle the temperature settingbetween °C and °F.

Automatic Air Swing• Press the SWING button to

activate the automatic air swingfunction.

• To distribute the air to a specific direction, press the SWINGbutton and wait until the airconditioner baffle swings to thedesired direction. Press thebutton again to hold it.

Sleep mode setting• Press the button to activate sleep

mode. This function is availableunder COOL, HEAT & AUTO mode.

• In COOL mode, the set temperature will increase 1.0°F after 30 minutes,2°F after 1 hour and a total of 4°Fafter 2 hours.

• In HEAT mode, the set temperaturewill decrease 2°F after 30 minutes,4°F after 1 hour and a total of 5°Fafter 2 hours.

OFF Timer Setting• Press the SET button will activate

the off timer function.

• Set the desired off time by pressingthe SET button continuously.

• Press the CLR button to cancel theoff timer setting.

Clock Time Setting• Press button + or - to

increase or decrease the clock time.

Symbol Identification

Cool Dry Fan Heat Sleep Power Timer Auto Fan Speed

low med high

Auto

IM 818

Netware 2 - Wired Wall Control (Optional)Features:1. Modes - Cool, Heat, Auto, Dry, Fan and Off.2. Temperature Range: 60° F to 86° F. (Press both arrows

simultaneously to convert from °C to °F or °F to °C).3. Timer - Seven day clock capable of a different On/Off

time for each day of the week. Note: Hold button is usedto temporarily override timer.

4. Shows time of day.5. Electronic lockout to prevent tampering.6. Fan Speeds - Low, medium, high and auto.7. Sleep - Sets temperature back for sleeping.8. Swing - Swings or positions air baffle for better air dis-

tribution.9. Display normally shows room temperature. (Momen-

tarily shows set point when a change is made.)10. Heat symbol ( ) blinks while outdoor coil defrosts

(heat pump only).11. Error codes blink on display:

E1 - Room sensor loose or defective.E2 - Indoor coil sensor loose or defective.E3 - Outdoor coil sensor loose or defective.E4 - Compressor cycling on overload.E5 - Low refrigerant charge.

For more detail, see manual that ships with the Wall Control.

SLEEP FAN MODESET TEMP

SWING ON TIMER OFF TIMER

HOLD DAY HOUR MINUTECLOCK

ON/OFF

°F°C

COOLTEMP.HEATTEMP.ROOMTEMP.

MON TUE WED THU FRI SAT SUN

ON

OFFAMPM

TIME ACTIVATE SET TIMER SET CLOCK

SET CLOCK DRY AUTO COOL HEAT FAN

AUTO SLEEP

SWING

IM 818

Special FeaturesDry mode• Select this mode when the standard Cool mode does not

provide sufficient dehumidification. The compressor andindoor low fan will cycle together and will operate forlonger periods of timeto provide the increased rate ofdehumidification. As a result, the room temperature dif-ferential may increase slightly.

Heat mode (heat pump only)• When the unit is switched on from cold start or defrosting

cycle, the indoor fan will start to operate only after thecoil warms up.

• When the set temperature is achieved, the indoor fan willoperate until the coil cools down.

Overheating protection (heat pump only)• In case the coil overheats (145°F), the compressor will

cut out.Frost prevention• If the indoor coil starts to frost, an LED light will blink to

indicate that the unit is in defrost.Fan speed and rated cooling capacity• The rated cooling capacity is provided at high indoor fan

speed.

• The cooling capacity is slightly lower when the unit isoperating at MEDIUM and LOW fan speed.

Operating ConditionsCooling

* 32°F on size 20 and 25, 23°F on size 30, 40 and 50 with optional Low AmbientKit.

Heating (heat pump only)

Ts = Dry Bulb Temperature, Th = Wet Bulb Temperature

Overall CheckingEnsure that:1. The unit has been mounted properly.

2. Refrigerant tubing connections have been checked forleaks.

3. Proper wiring and circuit breakers have been installed.

Drainage check:Check condensate drain for leaks and proper flow. See DrainTest, page 6.

Test run:Check the following items:

• Are all electrical plugs firmly inserted into there recept-cales?

• Is there any abnormal sound from the unit?

• Is there any abnormal vibration on the unit itself or piping?Confirm that:1. Condenser fan is running, with warm/cold air blowing off

the outdoor unit. (Cooling only/Heat Pump)

2. Evaporator blower is running and discharge cool/warm air.(Cooling only/Heat Pump)

Note: The control incorporates a 3 minute randum start delay in the circuit. Thus, it requires about 3 minutes before the outdoor unit will start.

Temperature Ts (dry bulb) °F Th (wet bulb) °F Minimum Indoor 61 52

Maximum Indoor 90 73

Minimum Outdoor 66* 24

Maximum Outdoor 114 75

Temperature Ts °F Th °F Minimum Indoor 61 —

Maximum Indoor 86 —

Minimum Outdoor 16 21

Maximum Outdoor 75 64

IM 818

Unit Indicator LightsIR signal receiverWhen an infrared remote control operating signal is transmit-ted, the signal receiver on the indoor unit beeps and indicator lights confirm acceptance of the signal transmission.

Figure 15. Indicator Lights Location - Indoor Unit

Wireless Remote ControlCooling: LED Indicator Lights

Mode and Diagnostic Chart

Heat Pump: LED Indicator Lights

Note: The main ON/OFF push button switch is located above the LED Indicator Lights.

IR Receiver,LED Indicator Lightsand On/Off Switch

SLEEP TIMER POWER HEAT TIMER POWER

POWER TIMER SLEEP HEAT

Mode or Fault Action or Possible Cause

ON ONTimer on

ON ONSleep mode on

ON ONHeat mode

Blink Continuously ON or OFFDefrosting outdoor coil Heating will resume after coil

is defrosted Once every 3 sec. Compressor cycling on over-

loadLow OD air flow, dirty coil, defective comp. or overload

Twice every 3 sec. Condensate pump not work-ing - water level too high

Defective pump or blocked drain

3 times every 3 sec.Gas leak Repair leak in refrigeration

system4 times every 3 sec. Room/indoor/outdoor coil

sensor loose or defective Attach or replace

IM 818

Startup After Extended Shutdown• Inspect thoroughly and clean indoor and outdoor units.

• Clean or replace air filter.

• Clean condensate drain line.

• Clean clogged indoor and outdoor coils.

• Check fan imbalance before operation.

• Tighten all wire connections.

• Check for refrigerant leakage.

Note: The crankcase heater should be energized for at least6 hours before starting the unit.

TroubleshootingWhen any malfunction is noted, immediately switch off the power supply to the unit. Some simple trouble shooting tips arelisted below.

Trouble Possible cause/treatment

The compressor does not operate. Protection against frequent starting. Wait for 3 to 4 minutes for the compressor to start operating.

Fans and compressor do not operate.

Power failure.

Check fuse or circuit breaker.

Power supply is disconnected.

Delay timer may be set incorrectly.

Air flow too low or insufficient cooling/heating capacity.

Dirty air filters.

Doors or windows may be open.

Adjust thermostat setting.

Discharge air flow has bad odor.Smoke, perfume, etc. may have collected on the indoor coil.

Clean coil.

Condensation on the return air grille of the indoor unit.

Use dry mode. High humidity in conditioned space.

Temperature set too low.

Increase temperature setting and operate unit at high fan speed.

Condensate leaking into room. Condensate drain plugged.

Hissing sound from the unit during operation. Refrigerant fluid flowing into the evaporator coil. Operate for a while to see if sound goes away.

IM 818

Service and Maintenance

The unit is designed to give long life operation with minimum maintenance required. However, it should be regularly checked and the following items should be given due atten-tion.

WARNINGDisconnect the main power supply before performing any service, maintenance or troubleshooting.

Item Maintenance Procedures Frequency

Indoor Unit Air Filters

1. Remove the filter before cleaning it.2. Remove the dust adhering on the filter by using a vacuum cleaner or wash

with lukewarm water (below 40°C/104°F) with neutral detergent solution.3. Rinse well and dry the filter before placing it back onto the unit.Note. Do not use gasoline, volatile substances or chemicals to clean the

filter.

At least once a month.

Indoor UnitClean the grille and panel by wiping it using soft cloth soaked in lukewarm water (below 40°C/104°F) with neutral detergent solution.Note. Do not use gasoline, volatile substances or chemicals to clean the

unit.Every year.

Condense Drain Pan and Pipe Check and clean if necessary. Every year.

Indoor Fan Check for abnormal noise. Every year.

Indoor/Outdoor Coil Clean the louvers and coil. Be careful not to bend or flatten the aluminium fins. DO NOT use cleaning fluids that might corrode the coil. Every year.

Power Supply 1. Check the running current and voltage for indoor and outdoor units.2. Check the electrical wiring and tighten the terminals. Every year.

Compressor No maintenance needed if refrigerant circuit remains sealed. However, check for refrigerant leaks at joints and fittings. Every year.

Compressor Oil Oil is factory charged. Not necessary to add oil if circuit remains sealed. No maintenance required.

Fan Motor Oil All motors are pre-lubricated and sealed at factory. No maintenance required.

IM 818

© 2004 Daikin

This document contains the most current product information as of this printing. For the most up-to-date product information, please go to www.DaikinApplied.com.

Daikin Applied800.432.1342www.DaikinApplied.com

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