Daikin IM-820 Instruction manual

Installation and Maintenance Manual IM-820

Group: Unitary

Part Number: IM-820

Date: March 2005

Supersedes: New

MCM Ceiling/Floor Convertible Split Type Air Conditioner

Indoor Unit

Wireless Remote

Control (Standard)

Outdoor Unit

© 2005 Daikin

IM 820

Wired Wall

Control (Optional)

Page 1

Table of Contents

Model Numbers . . . . . . . . . . . . . . . . . . . . . 2

General Information . . . . . . . . . . . . . . . . . . 3

Safety Precautions .......................................3

Unit Dimensions . . . . . . . . . . . . . . . . . . . . 4

Indoor Units ..................................................4

Outdoor Units ............................................... 4

Installation Guidelines . . . . . . . . . . . . . . . 5

Installation Diagram .....................................5

Installation of Outdoor Unit ...........................5

Installation of the Indoor Unit .......................6

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Indoor Unit Clearances . . . . . . . . . . . . . . . . 6

Standard Mounting . . . . . . . . . . . . . . . . . . . 7

Semi-enclosed Mounting . . . . . . . . . . . . . . 7

Refrigerant Tubing . . . . . . . . . . . . . . . . . . 8

Tubing Length & Elevation . . . . . . . . . . . . . 8

Tubing Preparation . . . . . . . . . . . . . . . . . . . 8

Tubing Connection To Units . . . . . . . . . . . . 8

Electrical Connections . . . . . . . . . . . . . . . 9

Wiring Diagrams . . . . . . . . . . . . . . . . . . . 10

Evacuating and Charging . . . . . . . . . . . . 17

Evacuating the tubing and the indoor unit . 17

Model Numbers

Cooling Only

Indoor Unit

MCM20D

MCM25D

MCM30D

MCM40D

MCM50D

Cooling/Heat Pump

Indoor Unit

MCM20DR

MCM25DR

MCM30DR

MCM40DR

MCM50DR

Outdoor Unit

MLC20BR

MLC25BR

MLC30CR

MLC40CR

MLC50CR

Outdoor Unit

MLC20B

MLC25B

MLC30C

MLC40C

MLC50C

Additional charge . . . . . . . . . . . . . . . . . . . .17

Charge operation . . . . . . . . . . . . . . . . . . . . 17

Remote Controller Operation Guide . . . .18

Netware 2 - Wired Wall Control (Optional) 19

Special Features . . . . . . . . . . . . . . . . . . . .20

Dry mode . . . . . . . . . . . . . . . . . . . . . . . . . .20

Heat mode (heat pump only) . . . . . . . . . . .20

Overheating protection (heat pump only) . .20

Frost prevention . . . . . . . . . . . . . . . . . . . . .20

Fan speed and rated cooling capacity . . . .20

Operating Conditions ................................. 20

Cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . .20

Overall Checking . . . . . . . . . . . . . . . . . . . .20

Unit Indicator Lights . . . . . . . . . . . . . . . . 21

IR signal receiver . . . . . . . . . . . . . . . . . . . .21

Netware 2 - Wired Wall Control (Optional) .21

Service and Maintenance . . . . . . . . . . . . 22

Electrostatic Filters . . . . . . . . . . . . . . . . . . 22

Filter Replacement . . . . . . . . . . . . . . . . . . .22

Startup After Extended Shutdown . . . . . . .22

Troubleshooting . . . . . . . . . . . . . . . . . . . . .22

Service and Maintenance . . . . . . . . . . . . . .23

Nominal Cooling - BTUH

20,000

24,000

30,000

40,000

50,000

Nominal Cooling - BTUH

20,000

25,000

30,000

40,000

50,000

Nominal Heating - BTUH

21,000

25,000

32,000

41,000

48,000

Page 2 IM 820

General Information

This manual provides the installation procedures so your air conditioner unit operates properly and provides 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 Precautions

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

WARNING

• The installer must determine and follow all applicable codes and regulations. This equipment presents hazards of electricity, rotating parts, sharp edges, heat and weight. Failure to read and follow these instructions can cause property damage, equipment damage, severe personal injury or death. This equipment must be installed by experienced, trained personnel only.

• Do not allow flammable fumes near unit or areas sharing ventilation.

• Installation and maintenance must 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 done in accordance with industry standards and local codes.

• Inspect the unit nameplate to be certain the voltage is the same as the voltage that will be delivered to the unit. Improper electrical wiring can cause property damage, 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 before installing or servicing the unit.

WARNING

Hazardous Voltage!

Disconnect all electrical power including remote disconnects before servicing. Failure to disconnect power before servicing can cause severe personal injury or death.

CAUTION

Use copper conductors only. Unit terminals are not designed to accept other types of conductors. Failure to do so can cause damage to the equipment.

CAUTION

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

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

• Connect drainage piping properly. If drainage piping is not connected properly, water leakage can cause property damage.

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

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

NOTICE

This product was carefully packed and thoroughly inspected before leaving the factory. Responsibility for its safe delivery was assumed by the carrier upon acceptance of the shipment. Claims for loss or damage sustained in transit must therefore be made upon the carrier, as follows:

VISIBLE LOSS OR DAMAGE

Any external evidence of loss or damage must be noted on the freight bill or carrier’s receipt, and signed by the carrier’s agent. Failure to adequately describe such external evidence of loss or damage may result in the carrie’s refusing to honor a damaged claim. The form required to file such a claim will be supplied by the carrier.

CONCEALED LOSS OR DAMAGE

Concealed loss or damage means loss or damage which does not become apparent until the product has been unpacked. The contents may be damaged in transit due to rough handling even though the carton may not show external damages. When the damage is discovered upon unpacking, make a written request for inspection by the carrier’s agent within fifteen (15) days of the delivery date. File a claim with the carrier since such damage is the carrier’s responsibility.

IM 820 Page 3

Unit Dimensions

Indoor Units

A

B

C E

Two mounting brackets shipped attached to the indoor unit. See page 7 for more detail.

F

Model MCM

A

B*

C

D

E

F

G

H

*Discharge air opening width.

Outdoor Units

20D/DR

46 1/4"

42 1/2"

47 3/4"

26 1/2"

6 1/4"

2 1/4"

20 1/2"

22"

25D/DR

46 1/4"

42 1/2"

47 3/4"

26 1/2"

6 1/4"

2 1/4"

20 1/2"

22"

D

G H

30D/DR

46 1/4"

42 1/2"

47 3/4"

26 1/2"

6 1/4"

3 3/4"

20 1/2"

22"

40D/DR

66"

62 1/4"

67 1/2"

26 1/2"

6 1/4"

3 3/4"

20 1/2"

22"

A

50D/DR

66"

62 1/4"

67 1/2"

26 1/2"

6 1/4"

3 3/4"

20 1/2"

22"

B

E

C

D

Page 4

Model MLC

A

B

C

D

E

20 & 25 B/BR

16"

33"

25 1/2"

2 1/4"

13 1/4"

30,40 & 50C/CR

19 1/4"

40 1/2"

33 1/2"

3 1/2"

15 3/4"

IM 820

Installation Guidelines

Installation Diagram

INDOOR UNIT

Air Discharge Swing Baffle

IR Receiver and

LED Indicator Lights

Air Discharge Grille

Air Intake Grille

Air Filters

Optional Wired

Wall Control

Refrigerant Tubing and Insulation

Air Intake

Wireless IR

Remote Control

Air Intake

Air Discharge Nozzle

OUTDOOR UNIT

Installation of Outdoor Unit

Install the outdoor unit in a manner to prevent mixing hot discharged air with return air flow. Also, the unit should be a suitable distance from obstructions See Figure 1 for minimum installation clearances. Double the dimensions shown if surroundings are more than 72" tall, or if there is an obstruction on top. Select the coolest possible place where intake air temperature is not greater than the outside air temperature

(maximum 113°F). See Table 1, Page 7 for weight of outdoor unit.

Figure 1. Outdoor Unit Minimum Clearances

12"

Min.

40"

Min.

Air

Intake

Air

Discharge

12"

Min.

Air

Intake

20"

Min.

Service

Access

IM 820 Page 5

Installation of the Indoor Unit

General

Electrical supply and installation must conform to local codes and regulations.

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.

Figure 2. Indoor Unit Minimum Clearances

Locate the installation for convenient wiring and piping.

Indoor Unit Clearances

The indoor unit must be installed in a manner to prevent mixing the cool discharged air with the hot return air. Follow the installation clearances shown in Figure 2. Do not place the indoor unit in direct sunlight. The location must be suitable for piping and drainage, and be away from doors or windows.

.1/2" min.

12" min.

CEILING MOUNT

19.68"

10" max.*

*Appliances, furniture or built-in architectural features must not extend more than 10".

16" min.

40" min.

WALL/FLOOR MOUNT

Page 6 IM 820

Standard Mounting

Make sure the ceiling or wall is strong enough to support the weight of the unit (See Table 1). Remove the mounting brackets from the unit and secure to wall or ceiling as required.

The unit must be level front to back and sloped 1/8" towards condensate drain (See Figure 3).

Table 1: Unit Weight - lbs.

Model

Weight ID Unit

20

95

Weight OD Unit 125

25

99

128

30

99

209

40

154

220

50

154

231

Figure 3. Slope for condensate drainage

Semi-enclosed Mounting

In case the unit is to be half-recessed into a false ceiling, make sure the unit is well-aligned with the ceiling.

Provide the installation space as shown in Figure 4.

Figure 4. Semi-enclosed Mounting

12" min.

48" min.

1/2" min.

23"

12" min.

Top Panel of Unit

22" 1/2"

Ceiling Mount Slope

1/8"

Mounting Surface

Ceiling Board

1/2"

6.3/4"

1/2"

Wall/Floor Mount Slope

IM 820 Page 7

Refrigerant Tubing

Tubing Length & Elevation

Copper tubing to connect the indoor and outdoor units is supplied by others or it can be ordered from the factory. See

Table 2 and Figure 5 for requirements.

Table 2: Refrigeration Tubing Requirements

Model

Maximum Length, ft.

Max. elevation, ft, H

Max. number of bends

Liquid tube size - OD

Gas tube size - OD

20

49’

26’

10

1/4"

5/8"

25

49’

26’

10

3/8"

5/8"

30

115’

49’

10

3/8"

5/8"

40

115’

49’

10

3/8"

3/4"

50

115’

49’

10

3/8"

3/4"

Note: The refrigerant pre-charged in the outdoor unit is for tubing length up to 25 ft. See Table 7 for additional R-22 refrigerant required on runs longer than 25 ft.

Figure 5. Tubing length and elevations

• Remove burrs from cut ends by holding tubing downwards to prevent metal chips from entering the tubing.

• Slide the flare nuts, for both the indoor unit and outdoor unit onto the copper tubing.

• Flare the tubing as shown in Figure 6 and Table 3.

• The flare must be even and not cracked or scratched.

Figure 6. Cutting and Flaring Tube

Cutting Copper Tube

1/4 Tube

Indoor Unit

Copper Tube

Flaring Tool

See Table 3

X

Elevation

Outdoor Unit

Elevation

Outdoor Unit

Table 3: Tube Flaring Dimensions

Tube Diameter - OD

Inch Imperial

1/4

3/8

5/8

.051

.063

.087

Tubing Connection To Units

X (in.)

Rigid

.028

.039

.067

• Connect the copper tubing to both the indoor and outdoor units (See Figure 7).

• Torque each flare nut to specifications (See Table 4).

• Cover both tubes individually with 3/8" wall foam insullation.

Figure 7

Flared Tube

Indoor Unit

Tubing Preparation

• Do not use contaminated or damaged copper tubing. Do not remove plastic, rubber plugs or brass nuts from the valves, fittings, tubings and coils until you are ready to connect suction or liquid line into valves or fittings.

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

• Cut the copper tubing with a tube cutter (See Figure 6).

Page 8

Unit Fitting

Table 4:

Tube Size (in.)

1/4

3/8

5/8

Flare Nut

Torque (ft./lb.)

13.3

31.0

48.0

IM 820

Electrical Connections

WARNING

Improper installation can cause severe personal injury or death. Wiring must be done by a qualified technician in compliance with local codes.

• Wiring must be in accordance with all applicable electrical codes.

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

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

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

• See Table 5, and 6 for the number of wires, wire gage and fuse/circuit breaker size required.

• NEC requires an approved electrical disconnect within sight of the unit so that anyone working on the unit can turn off the power and see that its not accidently turned back on. This will require two disconnects, one by the outdoor unit and one by the indoor unit.

Table 5: Wire, Fuse/Breaker Requirements - Cooling

Only

20 25 40 50 Unit Size

Voltage - 60Hz. 1 Ph.

Power supply wire size

No. of 12 ga. wires between units

Fuse/Breaker size

12 ga.

10 ga.

30

208/230

8 ga.

8 ga.

6 ga.

2 + gnd.

2 + gnd 3 + gnd 3 + gnd 3 + gnd

20 amp.

25 amp.

35 amp.

40 amp.

55 amp.

Table 6: Wire, Fuse/Breaker Requirements - Heat

Pump Only

Unit Size 20 25 30 40 50

Voltage - 60Hz. 1 Ph.

Power supply wire size 12 ga.

10 ga.

208/230

8 ga.

8 ga.

6 ga.

No. of 12 ga. wires between units*

Fuse/Breaker size

4 + gnd.

4 + gnd 6 + gnd 6 + gnd 6 + gnd

20 amp.

25 amp.

35 amp.

40 amp.

55 amp.

* Not including the low voltage OD coil sensor cable.

IM 820 Page 9

Wiring Diagrams

MODEL MCM20D/25D INDOOR UNIT- COOLING ONLY

RETURN AIR SENSOR

ROOM

JH

INDOOR COIL SENSOR

ID

OD

CN4

CN6

L

TRANSFORMER

WIRED

WALL

CONTROL

(OPTIONAL)

WIRELESS

REMOTE

CONTROLLER

AS

LOW MED

COMP.

LIVE

N2

N1

NOTE: DISCONNECT CN6

IF CN4 IS USED

KEY:

---- - FIELD SUPPLY WIRING

AS - AIR SWING MOTOR

BLACK

RED

AS

WHITE

BLUE

YELLOW

BLACK

G/Y

BLACK

BLACK

GREEN/YELLOW

COMP.

L N N

FL

FM

FH

AC IC

MC

FAN MOTOR

GREEN/YELLOW

L2

L1

} 208/230V

1 PHASE

60Hz

12 GA. WIRE

COMP N

Page 10

BROWN

FAN

MOTOR

C

COMPRESSOR

S

R

RED

CAPACITOR

BLUE

GREEN/YELLOW

BLUE

BLUE BLUE

CAPACITOR

RED

WHITE

MODEL MLC20B/25B OUTDOOR UNIT

IM 820

IM 820

MODEL MCM 030D INDOOR UNIT- COOLING ONLY

RETURN AIR SENSOR

ROOM

INDOOR COIL SENSOR

ID

OD

CN4 CN6

L

WIRED

WALL

CONTROL

(OPTIONAL)

WIRELESS

REMOTE

CONTROLLER


IF CN4 IS USED

TRANSFORMER

AS

LOW MED

COMP.

LIVE

N2

N1

RED BLUE

WHITE

BLUE

YELLOW

AS

BLACK

BLACK

GREEN/YELLOW

KEY:

---- - FIELD SUPPLIED WIRING


COMP. L N

FL

FM

FH

A.C.

I.C.

MC

FAN MOTOR

GREEN/YELLOW

12 GA. WIRE

208-230V

1 PH

60HZ

{

L2

L1

*NOTE: FIELD INSTALL 10A FUSE

IN BLUE AND RED WIRE AS SHOWN

RED

L N

BLUE

S

CAP.

R COMP.

L

BLUE

*10A

N

G/Y

RED

*10A

RED

1

2

RED REDRED

R/L1S/L2 T/L3 A1

HIGH / LOW

RED

PRESSURE SWITCH

A C

MAGNETIC

RED

BLUE

U/T1V/T2 W/T3 A2

CONTACTOR

BLUE BLUE

REDRED

BLACK

RED

WHITE

RED

BLACK

BLUE

WHITE

C

S

R

RED

RED

BROWN

COMPRESSOR CRANKCASE

HEATER

BROWN

FAN

MOTOR

G/Y

MODEL MLC30C OUTDOOR UNIT

Page 11

MODEL MCM40D/50D INDOOR UNIT- COOLING ONLY

RETURN AIR SENSOR

ROOM

INDOOR COIL SENSOR

ID

WIRED

WALL

CONTROL

(OPTIONAL)

WIRELESS

REMOTE

CONTROLLER


IF CN4 IS USED

CN4

CN6

TRANSFORMER

L

AS

LOW MED

COMP.

LIVE

N2

N1

KEY:



RED

BLACK

AS

BLUE

WHITE

BLUE

YELLOW

BLACK

GREEN/YELLOW

COMP. L/L1 N/L2

FM

FH

FL

A.C.

I.C.

MC

FAN MOTOR

GREEN/YELLOW

208-230V

1 PH

{

60Hz

L2

L1

12 GA. WIRE



L/L1 N/L2

REDRED RED

1L1 3L2 5L3

1

2T1 4T2 6T3

REDRED

2

COMP. L/L1 N/L2

RED

*10A FUSE

BLUE

GREEN/YELLOW

BLUE

*10A FUSE

RED

RED

8

A1

A2

7

BLUE BLUE

RED 2

6

LOCK OUT

RELAY

HIGH

PRESSURE

SWITCH

BLUE

PURPLE

BLACK

LOW

PRESSURE

SWITCH

BLACK

RED

WHITE

WHITE

RED

RED

C

BROWN

COMPRESSOR

R

S

CRANKCASE

HEATER

BROWN

FAN

MOTOR

G/Y

BLUE

MODEL MLC40C/50C OUTDOOR UNIT

Page 12 IM 820

IM 820

MODEL MCM20DR/25DR INDOOR UNIT - HEAT PUMP

RETURN AIR SENSOR

ROOM

JH

INDOOR COIL SENSOR

ID

OD

CN4 CN6

WIRED

WALL

CONTROL

(OPTIONAL)

WIRELESS

REMOTE

CONTROLLER


IF CN4 IS USED

4WV

RMODE

AS

LOW MED

TRANSFORMER

L

COMP.

LIVE

N2

N1

4WV OF COMP.

L

BLACK

BLACK

BLACK

RED

AS

BLUE

WHITE

BLUE

YELLOW

G/Y

GREEN/YELLOW

N N

KEY:



4WV - 4 WAY VALVE

FL

FM

FH

A.C.

I.C.

MC

FAN MOTOR

GREEN/YELLOW

L2

L1

208-230V

1 PH

60Hz

LOW VOLTAGE CABLE TO

OUTDOOR COIL SENSOR

12 GA. WIRE

TH2

BLACK

BLACK

BLACK

BROWN

BROWN

4WV OF COMP.

N

FAN

MOTOR

RED

BLUE

WHITE

MOTOR

C

CONPRESSOR

S

RED

R

BLUE

BLACK

4V

KEY:


4V - 4 WAY VALVE

TH2 - OUTDOOR THERMISTOR


MOEL MLC20BR/25BR OUTDOOR UNIT

BLACK

Page 13

208-230V

1 PH

{

60Hz

L2

L1

MODEL MCM 30DR INDOOR UNIT - HEAT PUMP

RETURN AIR SENSOR

ROOM

JH

INDOOR COIL SENSOR

TO OUTDOOR

DEFROST SENSOR

ID

OD

CN4 CN6

WIRED

WALL

CONTROL

(OPTIONAL)

WIRELESS

REMOTE

CONTROLLER 4WV

RMODE

TRANSFORMER

AS

LOW MED

L

COMP.

LIVE

N2

N1

NOTE:

DISCONNECT CN6

IF CN4 IS USED:

RED

AS

BLUE

YELLOW

WHITE

BLUE

FL

FM

FH

BLACK

GREEN/YELLOW KEY:



4WV - 4 WAY VALVE

A 4WV OF COMP.

L N

A.C.

I.C.

MC

FAN MOTOR

GREEN/YELLOW


OUTDOOR COIL SENSOR

12 GA. WIRE

Page 14

RED

21

22

REDRED

L1

T1

L

L2

T2

REDRED

N

RED

L3

T3

13

14

C

COMPRESSOR

R

S

CRANKCASE

HEATER

BLUE

*10A FUSE

GREEN/YELLOW

*10A FUSE

A 4WV OF COMP.

L

BLUE

RED

4WV

WHITE

A1

A2

BLACK

BLUE

HIGH

PRESSURE

SWITCH

BLACK

FAN

MOTOR

N

G/Y



MODEL MLC30CR - OUTDOOR UNIT

IM 820

208-230V

1 PH

{

60Hz

L2

L1

MODEL MCM 40DR/50DR INDOOR UNIT

RETURN AIR SENSOR

ROOM

INDOOR COIL SENSOR

TO OUTDOOR

DEFROST SENSOR

ID

OD

CN4

CN6

WIRED

WALL

CONTROL

(OPTIONAL)

WIRELESS

REMOTE

CONTROLLER

4WV

JH

RMODE

TRANSFORMER

L

AS

LOW MED

COMP.

LIVE

N2

N1

KEY:



A 4WV OF COMP.

L

L1

N

L2

RED

AS

BLUE

WHITE

YELLOW

BLACK

BLACK

GREEN/YELLOW

FL

FM

FH

A.C.

MC

I.C.

FAN MOTOR

GREEN/YELLOW


OUTDOOR COIL SENSOR

12 GA. WIRE

IM 820

RED

1L1

2T1

RED

L

3L2

4T2

L1

N

REDRED

6T3 2

REDRED

L2

RED

5L3 1

CRANKCASE

HEATER

C

COMPRESSOR

R

S

BLUE

*10A FUSE

GREEN/YELLOW

*10A FUSE

A 4WV OF COMP. L

L1

N

L2

BLUE

RED

4WV

PURPLE

A1

A2

BLACK

BLUE

HIGH

PRESSURE

SWITCH

BLUE

FAN

MOTOR

G/Y



MODEL MLC40CR/50CR

Page 15

Page 16

MODEL : MLC 20B - 25B OUTDOOR UNIT - COOLING ONLY

- OPTIONAL LOW AMBIENT KIT (208/230V - 1 PHASE - 60HZ)

CM

C

S

R

WHITE

OL

RED

CAPACITOR

BLUE

GREEN/YELLOW

BLUE BLUE

CAPACITOR

FM

YELLOW

ORANGE

OUTDOOR COIL SENSOR

KEY

CM - COMPRESSOR MOTOR

FM - OUTDOOR FAN MOTOR

FSCM - FAN SPEED CONTROL MODULE

12 GA. FIELD SUPPLIED WIRING

1 2 3 4 5

FSCM

COMP N

(TO INDOOR UNIT)

MODEL : MLC 20BR - 25BR OUTDOOR UNIT - HEAT PUMP

- OPTIONAL LOW AMBIENT KIT (208/230V - 1 PHASE - 60HZ)

KEY

FM - FAN MOTOR

CM - COMPRESSOR MOTOR

4V - 4 WAY VALVE

TH2 - OUTDOOR THERMISTOR

FSCM - FAN SPEED CONTROL MODULE

12 GA. FIELD SUPPLIED WIRING TH2

BLACK

BLACK

(TO INDOOR UNIT)

4V OF COMP.

BLACK

N E

BROWN BLUE

E

4 3 2 1

FSCM

E

FM

RED

BLACK

4V

C

R CM

S

RED

BLUE

BLUE

BLACK

IM 820

Evacuating and Charging

Evacuating the tubing and the indoor unit

The outdoor unit is pre-charged with refrigerant R-22. The indoor unit and the refrigerant connection tubing must be evacuated 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 9).

4. Start the pump and evacuate to -760 mm Hg (-29.9" Hg).

5. Close the valve of the changing gauge and stop the vacuum pump.

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

Allen wrench (See Figure 8).

Figure 8. 3-way Suction Valve on Outdoor Unit

Hex Socket for 4 mm

Allen wrench

Flare Nut

Refrigerant

Tubing

Service

Port

Outdoor Unit

3-way Valve

Table 7: Additional R-22 ounces per foot of tubing

(when tubing length is more than 25 ft.) and maximum tubing length.

Model

20D

25D

30D

40D

50D

20DR

25DR

30DR

Oz. Per ft.

.16

.40

.53

.55

.55

.16

.50

.53

Max. Length

49’

49’

115’

115’

115’

49’

49’

115’

40DR

50DR

.55

.55

115’

115’

Charge operation

This operation must be done by weighing the R-22 being added thru the service port on the 3-way suction valve.

See Table 7 and Figure 10.

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 and close the high pressure side of the gauge. Purge the air from the service hose (See Figure 10).

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 cylinder valve.

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

Figure 9 Evacuation Schematic

Indoor Unit

Liquid side

Outdoor Unit

Discharge Valve

Close

Gas side

Vacuum

Pump

Close

Suction Valve

Low

Press.

High

Press.

Figure 10. Charging Schematic

Indoor Unit

Liquid side

Gas side

Outdoor Unit

Discharge Valve

Suction Valve

Low

Press.

High

Press.

Additional charge

The refrigerant is pre-charged in the outdoor unit. If the tubing length between the indoor and outdoor unit is no more than 25 ft.

, then an additional charge after evacuation is not necessary. If the tubing length is more than 25 ft., use additional R-22 as indicated in Table 7.

IM 820 Page 17

Remote Controller Operation Guide

Transmission source

• The source where the signal is transmitted.

Signal Transmission Indication

• Blinks to confirm the last setting was sent to the unit.

Temperature Setting

• Set the desired room temperature by pressing the buttons to increase or decrease the set temperature.

• The temperature setting range is from 60°F to 86°F.

• Press both buttons simultaneously to toggle the temperature setting between °C and °F.

Fan Speed Selection

• Press the button until the desired fan option displays (auto, low, med. or high). "Auto" automatically selects high fan until room temperature is within 2 o

F of setting, then switches to low fan. Fan runs continuouse in COOL and cycles in

HEAT.

ON Timer Setting

• Press the SET button will activate the on timer function.

• Set the desired on time by pressing the SET button continuously. If the timer is set to 7.30am, the air conditioner will turn on at 7.30 sharp.

• Press the CLR button to cancel the on timer setting.

Automatic Air Swing

• Press the SWING button to activate the automatic air swing function.

• To distribute the air to a specific direction, press the SWING button and wait until the air conditioner baffle swings to the desired direction. Press the button again to hold it.

Clock Time Setting

• Press button + or - to increase or decrease the clock time.

On/Off Button

• Press once to start the air conditioner.

• Press again to stop the air conditioner.

Operation mode

• Press the MODE button to select the type of operating mode.

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

• For heat pump unit, the available modes are: AUTO, COOL, DRY,

FAN & HEAT.

OFF Timer Setting

• Press the SET button will activate the off timer function.

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

• Press the CLR button to cancel the off timer setting.

Sleep mode setting

• Press the button to activate sleep mode. This function is available under 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°F after 2 hours.

• In HEAT mode, the set temperature will decrease 2°F after 30 minutes,

4°F after 1 hour and a total of 5°F after 2 hours.

Symbol Identification

Auto low med high

Cool Dry Fan Heat Sleep Power Timer Auto Fan Speed

Page 18 IM 820

Netware 2 - Wired Wall Control (Optional)

SET CLOCK

SLEEP

AUTO

FAN

DRY AUTO COOL HEAT FAN

SLEEP

SWING

MON TUE WED THU FRI SAT SUN

AM

PM

TIME ACTIVATE SET TIMER

ON

OFF

SET CLOCK

COOL

TEMP.

HEAT

TEMP.

ROOM

TEMP.

MODE

˚F

˚C

ON/OFF

SET TEMP

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.)

3. Timer - Seven day clock capable of a different On/Off time for each day of the week. Note: Hold button is used to 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 distribution.

9. Display normally shows room temperature. (Momentarily shows set point when a change is made.)

SWING

HOLD

CLOCK

ON TIMER

DAY

OFF TIMER

HOUR MINUTE

(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.

IM 820 Page 19

Special Features

Dry mode

• Select this mode when the standard Cool mode does not provide sufficient dehumidification. The compressor and indoor low fan will cycle together and will operate for longer periods of time to provide the increased rate of dehumidification. As a result, the room temperature differential 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 the coil warms up.

• When the set temperature is achieved, the indoor fan will operate 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 is operating at MEDIUM and LOW fan speed.

Operating Conditions

Cooling

Temperature

Minimum Indoor

Maximum Indoor

Minimum Outdoor

Maximum Outdoor

Ts (dry bulb) °F

61

90

66*

114

Th (wet bulb) °F

52

73

24

75

* 32

Kit.

° F on size 20 and 25, 23 ° F on size 30, 40 and 50 with optional Low Ambient

Heating (heat pump only)

Temperature

Minimum Indoor

Maximum Indoor

Minimum Outdoor

Maximum Outdoor

Ts °F

61

86

16

75

Ts = Dry Bulb Temperature, Th = Wet Bulb Temperature

Th °F

—

—

21

64

Overall Checking

Ensure that:

1. The unit has been mounted properly.

2. Refrigerant tubing connections have been checked for leaks

3. Proper wiring and circuit breakers have been installed.

Drainage check:

Check condensate drain for leaks and proper flow.

Test run:

Check the following items:

• Are all electrical plugs firmly inserted into there receptcales?

• 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) delay in the circuit. Thus, it requires about 3 minutes before the outdoor unit will start.

Page 20 IM 820

Unit Indicator Lights

IR signal receiver

When an infrared remote control operating signal is transmitted, the indoor unit beeps and indicator lights confirm acceptance of the signal transmission.

Figure 11. IR Receiver & LED Indicator Lights Location

INDOOR UNIT

Air Discharge

Swing Baffle

Wireless Remote Control

Figure 12. LED Indicator Lights Display

Cooling Unit

Cool Dry Fan

IR Receiver and LED

Indicator Lights

Air Discharge

Grille

Air Filters

Air Intake Grille

Optional Wired

Wall Control

Wireless Remote

Control

Figure 13: Mode and Diagnostic Chart

Cool Dry Fan Heat

Cool Dry Fan Heat

Mode or Fault

Cooling mode

Dry mode

Fan mode

Heat mode

Auto mode in heating operation.

Auto mode in cooling operation.

Defrost operation

Compressor overload protection

Outdoor coil sensor contact loose/short

Room air sensor contact loose/short

ON Blinking

Netware 2 - Wired Wall Control (Optional)

Error codes blink on wall control display as follows:

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.

IM 820 Page 21

Service and Maintenance

WARNING

Disconnect the electrical power supply before performing any service, maintenance or troubleshooting.

Electrostatic Filters

Pre-charged electrostatic polypropylene filter removes microscopic dust, smoke and small invisible particles to keep the room air clean.

Filter Replacement

WARNING

Disconnect the main power supply before opening the return air grille.

DO NOT restore power until the grille is closed.

See Figure 14.

Replace the electrostatic air purifying filters every 6 months or sooner if they turn brown.

Replacement filters can be purchased from your sales representative or distributor.

Use the new filter immediately once it has been removed from the package.

1.

Open the return air grilles and remove the filters.

2. Use a vacuum cleaner or wash with water with a neutral cleaning agent.

3. Rise and dry before installing the filter.

Note: Never use chemicals such as gasoline or paint thinner to clean the filters. Filters will be damaged.

Figure 14. Changing the Filters

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 imbalanced before operation.

• Tighten all wire connections.

• Check for refrigerant leakage.

Note: The crankcase heater should be energized for at least

6 hours before starting the unit.

Troubleshooting

If any malfunction of the unit is noted, immediately switch off the power supply.

Check the following chart for possible causes/treatments.

If the trouble persists, please call your local dealer/serviceman.

Trouble

The compressor does not operate.

Possible cause/treatment

Protection against frequent starting. Wait for 3 to 4 minutes for the compressor to start operating.

Power failure.

Fans and compressor do not operate.

Air flow too low or insufficient cooling/heating capacity.

Discharge air flow has bad odor.

Condensation on the return air grille of the indoor unit.

Condensate leaking into room.

Hissing sound from the unit during operation.

Check fuse or circuit breaker.

Power supply disconnect off.

Delay timer may be set incorrectly.

Dirty air filters.

Doors or windows open.

Adjust thermostat setting.

Smoke, perfume, etc. may have collected on the indoor coil.

Clean coil.

Use dry mode. High humidity in conditioned space.

Set temperature too low.

Increase temperature setting and operate unit at high fan speed.

Condensate drain plugged.

Refrigerant fluid flowing into the evaporator coil. Operate for a while to see if sound goes away.

Page 22 IM 820

Service and Maintenance

WARNING

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

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 attention. .

Item

Indoor Unit

Air Filters

Indoor Unit

Maintenance Procedures

Clean 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.

Frequency

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.

Every year.

Condense Drain Pan and

Pipe

Indoor Fan

Indoor/Outdoor Coil

Power Supply

Compressor

Compressor Oil

Fan Motor Oil

Check and clean if necessary.

Every year.

Check for abnormal noise.

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.

1. Check the running current and voltage for indoor and outdoor units.

2. Check the electrical wiring and tighten the terminals.

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

Oil is factory charged. Not necessary to add oil if circuit remains sealed.

All motors are pre-lubricated and sealed at factory.

Every year.

Every year.

Every year.

Every year.

No maintenance required.

No maintenance required.

IM 820 Page 23

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 Applied

800.432.1342

www.DaikinApplied.com

© 2004 Daikin

No results