LG LP-F8081CL, LP-F8081HL, LP-F8081ZL Service manual

1. Preface

This service manual provides various service information, containing the mechanical and electrical parts and etc. This package air conditioner was manufactured and assembled under the strict quality control system.

The refrigerant is charged at the factory. Be sure to read the safety precautions prior to servicing the unit.

1.1 Safety Precautions

¤ When servicing the unit, set the main SWITCH to OFF and remove the POWER SUPPLY cables.

¤Ł Observe the original lead dress. If a short circuit is found, replace all parts which have been overheated or damaged by the short circuit.

¤Ø After servicing the unit, make an insulation resistance test to protect the customer from being exposed to shock hazards.

1.2 Features

¤ Design for cooling and heating

¤ŁSuper energy efficiency

¤ØMicom Control

¤ŒWhisper quiet operation

¤ºRemovable air filter

¤3 minute delay circuit

¤7 hour timer

¤3 step speeds for cooling/heating

¤Auto Restart

–3–

1.3 Product Specifications

	MODEL				LP-F8081CL	LP-F8081HL
						LP-F8081ZL
POWER SOURCE (ø, V, Hz)					3,380 – 415,50	3,380 – 415,50
COOLING		CAPACITY		Btu/h	71,400	71,400
				W	20,927	20,927
		INPUT		W	6,900	7,000
		CURRENT		A	12.0	13.0
HEATING		CAPACITY		Btu/h	–	74,000
(Including Electric				(W)		(8,000)
heater)				W	–	21,680
				(W)		(8,000)
		INPUT		W	–	6,500
				(W)		(8,000)
		CURRENT		A	–	12.5
				(A)		(12.0)
		MAKER			COPELAND	COPELAND
		TYPE			SCROLL	SCROLL
COMPRESSOR		MODEL			ZR94KC – TFD	ZR94KC – TFD
		INPUT		W	6,990	6,990
		CURRENT		A	13.6	13.6
		CAPACITY		Kcal/h	19,732	19,732
NOISE		INDOOR		dB(A)	56	56
LEVEL(1m)		OUTDOOR			65	65
AIR		INDOOR		CMM	35	35
VOLUME		OUTDOOR			104	104
REFRIGERANT R-22				Kg	5.9	7.2
HEAT		INDOOR		R/C/FPI	3/33/17	3/33/17
EXCHANGER		OUTDOOR		R/C/FPI	2/18/17	2/18/17
FAN		INDOOR		TYPE	SIROCO	SIROCO
		OUTDOOR			PROPELLER	PROPELLER
ROOM TEMPERATURE CONTROL					MICOM CONTROL	MICOM CONTROL
NET		INDOOR		Kg	132	132
WEIGHT		OUTDOOR			150	150
DIMENSIONS		INDOOR		mm	1,050 × 1,880 × 495	1,050 × 1,880 × 495
(W × H × D)
		OUTDOOR			1,000 × 965 × 370	1,000 × 965 × 370
SVC		LIQUID		Inch	5/8	5/8
VALVE		GAS		(mm)	1	1

–4–

1.4 Functions

Indoor Unit

Power Switch ON/OFF

Operation Mode Control

• Cooling, Soft Dry, Auto, Fan Cooling Model

• Cooling, Heating, Soft Dry, Fan Heat Pump Model

Sensing the room temperature

• Room temperature sensor (Thermistor)

Controlling the room temperature

• Maintains the room temperature in accordance with the setting temperature.

Starting Current Control

• Indoor fan is delayed for 3 sec at the starting.

Sensing Heat Exchanger Temperature

• Heat exchanger temperature sensor (Thermistor)

Timer Delay Safety Control

• Restarting is inhibited for approx. 3 minutes.

Indoor Fan Speed Control

• High, Low, Duct

Operation Indication lamps

Temperature Setting

•Up : up to 30°C

•Down : down to 16°C

Airflow Direction Control

• Airflow direction Manual control

Room temperature Display

• Low, 10° ~ 35°C, Hi

Timer Control

• Off Timer (1, 2, 3....7 hour)

–5–

Outdoor Unit

Deice Control

• De-ice PCB

Outdoor Fan Speed Control

• One speed

Sensing Heat Exchanger Temperature

• Heat exchanger temperature sensor (Thermistor)

–6–

2. Dimensions

Indoor Unit

	1051
Air Outlet	951
Vent
	268
Window
Display
	568
	1890
Air Inlet
Vent	990

Outdoor Unit

	496
	75	75	193
	130		121
				Earth
				Screw
	36		36
131	345		60	93.8

36	75
	93.8	145.8
	58.5
	109.5
	525

Air Outlet Vent

Air Inlet Vent

6
54
650	700

260
		930	963
95 80	582
125	185
	700	50
	1245
		–7–

3. Wiring Diagram

Indoor & Outdoor Unit Circuit Diagram

(1) LD-F8081CL

INDOOR UNIT CIRCUIT DIAGRAM
					MAIN PCB ASM
CAPACITOR	YL	OR	ASMPCB	DISPLAY	CN2	GN/YL
						BK	213 4	BR
	BR							GN/YL
	INDOOR	BK			CN1
	FAN MOTOR	BL				RD		BK
		RD				WH		BL
				ROOM				CONNECT TO
								OUTDOOR UNIT
	RY3			TH
	RY2	FUSE		EVA		RY3
	RY1
NOTE		(10A)		TH
BL : BLUE					CN3
BK : BLACK	SUB PCB ASM
BR : BROWN					3
OR : ORANGE				YL
RD : RED					2	CONNECT TO CONTACT "R" "N" OF
				BL
WH : WHITE					1	OUTDOOR TERMINAL BLOCK "Tmo1"
YL : YELLOW
GN/YL : GREEN/YELLOW

FIELD WIRING

NOTE

1.This product is 3ø ,4W,380-415V,50Hz.

2."Check List" before test run.

1st: Reconfirm the wiring connecting of compressor, outdoor unit motor.

2nd: Fasten the screw of "Terminal Block Tmo1,2" once more.

Tmo1,2 TERMINAL BLOCK

52C MAGNETIC CONTACTOR

51C EOCR(COMP.)

63H HIGH PRESSURE SWITCH

CH CRANKCASE HEATER

FMo1,2 OUTDOOR FAN MOTOR

Co1,2 RUN CAPACITOR FOR FAN(OUTDOOR)

CONNECT TO

INDOOR UNIT

BK

FUSE(5A)

WH

WH

RD

WH

WH

FUSE(5A) WH

CH

52C

1

3

5

31

BK

Tmo1 R S T N

A

OR

BK

B

RD

OR

2

4

6

BK

32

BK

BK

51C

BK

BK

CONNECT TO

L2 Tb

Ta

Co1

Co2

L1

INDOOR UNIT

3Ø, 4W

Tc

1 BR

380-415V, 50Hz

2

BL

POWER SUPPLY

3

BK

NOTE

WH

4

GN/YL

YL

OR

BK

YL

OR

BK

GN/YL

5

BL : BLUE

BR

BR

WH

6

BK WH T3 RD

BK : BLACK

FMo1

FMo2

63H

Tmo2

BR : BROWN

T1

T2

OR : ORANGE

COMP

RD : RED

BK

WH : WHITE

YL : YELLOW

GN : GREEN

GN/YL : GREEN/YELLOW

–8–

(2) LD-F8081HL/ZL

INDOOR UNIT CIRCUIT DIAGRAM

TF

MAIN PCB ASM

CAPACITOR

OR

ASMPCB

DISPLAY

CN2

Ry3

POWER SUPPLY

L1

T1

EH

BR

3Ø 380~415V

CN1

L2

T2

INDOOR

BK

50Hz

BL

L3

T3

TF

FAN MOTOR

YL

a

b

RD

Ry6

ROOM

BK

TH

BL

WH

BK

5 BK

RY3

RD

EVA

Ry7

BK

RY2

FUSE

1

2

3

BK

4

BK

TH

RY1

(10A)

4

5

6

TP

Tmi

CN3

CONNECT TO OUTDOOR

SUB PCB ASM

Tmi

(HOUSING ASM)

3

Option part

YL

2

CONNECT TO CONTACT "T" "N" OF

BL

1

OUTDOOR TERMINAL BLOCK "A"

DEF TH	THERMISTER FOR DISCHARGE AIR	Ry3	RELAY FOR COMP	Tmi	TERMINAL BLOCK(INDOOR)	NOTE
EH	ELECTRIC HEATER	Ry6	RELAY FOR HEATER	TP	BIMETAL SWITCH FOR HEATER
						BK:BLACK	YL :YELLOW
EVA TH	THERMISTER FOR EVA TEMP.	Ry7	RELAY FOR HEATING	TF	THERMAL FUSE	BL:BLUE	WH:WHITE
ROOM TH	THERMISTER FOR EVA INDOOR TEMP	THi	THERMISTOR FOR INDOOR TEMP			BR:BROWN

OUTDOOR UNIT WIRING DIAGRAM

BK

63H2

BK

BK

F2

BK

BK

WH

RD

RD

WH

BK

BK

C TH

63H1

3.P.D

F2

NC NO NC NO

RD

RD

RD

R

S

T

D.P

A

B

52F1

GN/YL

1

2

TM R S T N

YL

YL

BL

1

3

5

31

A

WH

WH

3

4

5

6

POWER SUPPLY

WH

7

8

3ø ,380-415V,50Hz

2

4 6 32 B

TERMINAL(4P)

52C

OR

BK

1

BR

YL BR OR

BK

YL

BR OR

BK

WH

2

BL

BK

BR

3

BL

BK

WH

RD

BL

4

L3

L2

20SV

BL

5

YL BR OR

BK

YL

BR OR

BK

L1

6 GN/YL

BK

BK

FMo

FMo

COMP

NOTE

49FMo

49FMo

					BL : BLUE		RD	: RED
					BK : BLACK		WH	: WHITE
					BR : BROWN		YL	: YELLOW
					OR : ORANGE		GN/YL : GREEN/YELLOW
CH	CRANKCASE HEATER	D.P	DEICER PCB	52F1	RELAY FOR FMo	TM	MAIN TERMINAL BLOCK
F1,2	FUSE (250V, 5A)	C TH	THERMISTOR FOR PIPE TEMP.(OUTDOOR)	63H1	HIGH PRESSURE SWITCH	52C	MAGNETIC CONTACTOR
Co	RUN CAPACITOR FOR FMo	20SV	REVERSING COIL	63H2	HIGH PRESSURE SWITCH FOR HEATING	3.P.D	3 PHASE DETECTOR
FMo	OUTDOOR FAN MOTOR	49FMo	INERNAL T.P FOR FMo	49C	INTERNAL O.L.P FOR COMP.

–9–

4.OPERATION DETAILS

(1)The function of main control

1. Time Delay Safety Control

• 3min... The compressor is ceased for 3 minutes to balance the pressure in the refrigeration cycle. (Protection of compressor)

• 3sec... The indoor fan is ceased for 1~3 seconds to prevent relay noise. (Protection of fan relay and micro chip)

• 1min... The 4-way valve is ceased for 30 sec. to prevent the refrigerant-gas abnormal noise when the Heating operation is OFF or switched to the other operation mode.

2. Cooling Mode Operation

•When selecting the Cooling() Mode Operation, the unit will operate according to the setting by the controller and the operation diagram is as following

Intake Air temp.

	Setting Temp. +1°C
	(Compressor ON)
	Setting Temp. -1°C
	(Compressor OFF)
			3 minutes		3 minutes
	Indoor Fan Speed	Selecting	Selecting	Selecting	Selecting	Selecting
		fan speed	fan speed	fan speed	fan speed	fan speed
	Compressor	ON	OFF	ON	OFF	ON

– 10 –

3. Auto Operation (Cooling Model only)

ƒUThe operation procedure is as following.

Press Start/Stop Button

Select Auto Operation Mode

Check the Room temperature

ƒUAuto Operation for Cooling

	Operation Condition		Intake-air Temperature	Setting temperature	Fan speed
			Over 26°C	25°C
					Controlled
	When Switch to		Over 24°C~below 25.5°C	Intake air -1.0°C
					by Fuzzy logic
	Auto Operation		Over 22°C~below 23.5°C	Intake air -0.5°C
			below 21.5°C	Intake air Temperature(18°C, MAX)

Intake Air Temp.
Setting Temp. +1°C
(Compressor ON)
Setting Temp. -1°C
(Compressor OFF)
3 minutes	3 minutes

	Indoor Fan Speed			Fuzzy Speed
	Compressor	ON	OFF		ON	OFF

– 11 –

4. Heating Mode Operation

The unit will operate according to the setting by the remote controller and the operation diagram is shown as following.

Intake Air Temp.

Setting Temp. +1°C

(Compressor OFF)

A

A

Setting Temp.

(Compressor ON)

Setting Temp. -1°C

minimum

minimum

Hot

minimum

10sec.

10sec.

Start

1min

Indoor Fan Speed

OFF

LOW

Selecting

LOW

OFF

Selecting

LOW

OFF

fan speed

fan speed

Compressor

ON

OFF

ON

OFF

Electric Heater(Option)

OFF

ON

OFF

ON

OFF

• A point: The indoor pipe temperature to be less then 35°C or Discharge air Temperature to be less than 29°C. The indoor fan operates for minimum 10sec. even if the indoor pipe temperature falls lower than35°C or the discharge air Temperature falls lower than 29°C.

¡ During heating operation, the operating procedure of the indoor fan is as the following.

Stop(VI)

Low(V)

Selecting Fan Speed(IV)

39˚C

Discharge Air Temp.

34˚C

		28˚C				(Hot-Start Release Point)
	Indoor Pipe Temp.
		26˚C
			Heating Start
			Stop(I)			Low(II)			Selecting Fan Speed(III)
		(Hot-Start Operating)
Step	Indoor fan speed					Pipe temp.				Air discharge temp.
¥	Off			≤ 28°C(Hot start operating)						–
¥–	Low					≥28°C				<39°C
¥†	Selecting speed					≥28°C				≥39°C
¥‡	Selecting speed					≥28°C				>34°C
¥·	Low					≥26°C				≤ 34°C
¥	Off					≤ 26°C				–

– 12 –

5. Hot-Start Control

•The indoor fan stops until the evaporator piping temperature will be reached to 28°C.

•During heating operation, if piping temperatures fall below 26°C fan stops.

•The operation diagram is as following.

		Maximum
INDOOR PIPE		1min
TEMP.
28°C
26°C
INDOOR FAN	OFF	LOW		Selecting	OFF
SPEED				fan speed
COMPRESSOR			ON

6. Defrost Control

•Defrost operation is controlled by timer and sensing temperature of outdoor pipe.

•The first defrost starts only when the outdoor pipe temperature falls below -6°C after 45 minutes passed from starting of heating operation and more than.

•Defrost ends after 10 minutes pass from starting of defrost operation or when the outdoor pipe temperature rises over 12°C even if before 10 minutes.

•The second defrost starts only when the outdoor pipe temperature falls below -6°C after 45 minutes pass from ending of the first defrost and more than.

			More than 45 minutes of	Within	More than 45 minutes of
Outdoor Pipe Temp.			heating operation	10minutes	heating operation	Defrost
				Defrost	Less than 5 minutes
12°C
(Defrost OFF)

-6°C
(Defrost ON)
			HOT-
			START
Indoor Fan	ON	OFF	ON	OFF
Compressor	ON	ON	ON	ON
4-Way Valve	ON	OFF	ON	OFF
		– 13 –

7.Soft Dry Operation Mode

•During Soft Dry Operation, the compressor ON temperature is the setting temperature plus 2°C, the compressor OFF temperature is the setting temperature minus 1°C.

•When the room temperature rises over the compressor ON temperature, the operation mode is switched to the Cooling mode.

•When the room temperature falls between the compressor ON temperature and OFF temperature, the operation mode is switched to the Soft Dry Operation.

•The operation diagram is shown below.

	Intake Air Temp.	Operation		Dry operation		Cooling
		Cooling				operation
	Setting Temp. +2°C
	(Compressor ON)
	Setting Temp. -1°C		3 min.	10 min.	maximum		3 min.	maximum
	(Compresso OFF)
					7 min.			10 min.
	Indoor Fan Speed	Selecting	LOW	LOW	LOW	Selecting	LOW	LOW	LOW
		fan speed				fan speed
	Compressor	ON	OFF	ON	OFF	ON	OFF	ON	OFF

8. Protection of the evaporator pipe from frosting

• Compressor and outdoor fan stop when indoor pipe temperature is below -2°C and restart at the pipe temperature is above 12°C.

9. Child Lock function

This function is to operate Air conditioner only by Remocon. The procedure is as the following

1st: Press the 2 buttons of the temperature control simultaneously, to raise-to lower on the Display Panel of the product for more 3 seconds.

2nd: The buzzer sounds and then the window of Display Panel shows LOC (LOC) mark.

3rd: To release this function, the reverse again the operating procedure could be done.

¡During this function is operating, any buttons of Display Panel don't work. But it is possible to operate with Remote controller.

10.Off Timer Function

This function is to set the time of stopping the unit operation.

The procedure is as the following.

1st: Press the timer set button on the Remocon.

2nd: The buzzer sounds and then the display window shows the Off-Time to be set as 1:00¡ ... ¡

7:00 ¡ 0:00.

- The Off-Time is shifted as the following by each press.

1:00

2:00

3:00

4:00

5:00

6:00

7:00

0:00

-If you select '0:00', the Off-Timer function will be cancelled.

-During Off-Timer Operation, if you repress the timer set button, the rest time will be displayed.

–14 –

11. Alarm mode display / only displayed while operating.

CH0 : The sensor for sensing room temperature is open or short.

CH1 : The sensor for sensing piping temperature of evaporator is open or short.

12. Function for test operation.

This function shall be operated while the set not operating and start while set temperature set button(▼) down and start/stop buttons pressing continuously for 3 seconds.

If you press start/stop button continuously for 3 seconds while set temp down button pressing once more test operation and the set shall be stopped.

After test operation operating and 18 minutes, test operation and the set shall be stopped.

If you press start/stop button while test operation operating, test operation shall be stopped and the set shall start.

When test operation operating, the display of 88:88 shall be shifted to tESt

4-way valve is always off when test operation.

Fan speed is high, air purifying system and auto air flow operations are off when test operation. Regardless of outside temperature, the set operates when test operation.

All but start/stop and air purifying system buttons cannot be set.

13. Function of changing set temperature when re-operation after stop.

Heating operation is set to the previous set temperature when re-operation after stop. Cooling operation is set to the previous set temperature when re-operation with start/stop button.

1.Operation mode.

Cooling/soft dry mode → Cooling mode Heating mode → Heating mode

2.Setting the set temperature when cooling operation.

Room temperature > Set temperature: to be set to the previous set temperature. Room temperature ≤ Set temperature

a)Room temperature ≥ 26°C: to be set to 24°C

b)22°C ≤ Room temperature ≤ 25°C: to be set to 21°C

c)Room temperature ≤ 21°C:to be set to -1°C less than room temperature.

3.Setting the set temperature when heating operation. Set the previous set temperature when stopped.

14.Auto Restart

In case the power comes on again a power failure, Auto Restarting Operation is the function to operate procedures automatically to the previous operating conditions.

– 15 –

5. Installation

5-1. Installation of Indoor, Outdoor unit

1) Selection of the best location

Indoor unit

•There should not be any heat source or steam near the unit.

•There should not be any obstacles to prevent the air circulation.

•A place where air circulation in the room will be good.

•A place where drainage can be easily obtained.

•A place where noise prevention is taken into consideration.

•Do not install the unit near the door way.

•Ensure the spaces indicated by arrows from the wall, ceiling, fence, or other obstacles.

Outdoor unit

•If an awning is built over the unit to prevent direct sunlight or rain exposure, be careful that heat radiation from the condenser is not restricted.

•There should not be any animals or plants which could be affected by discharged hot air.

•Ensure the space indicated by arrows from the wall, ceiling, fence, or other obstacles.

Piping length and the elevation

	MODEL	PIPE SIZE		Max.	Max.
				Length	Elevation
		GAS SIDE	LIQUID SIDE	A (m)	B (m)
	80K	1"	5/8"	50	35
	(Btu/h)

100cm	5cm
5cm	40cm
	150cm
50cm	50cm
	50cm

Indoor unit

A

B	Outdoor unit

–16–

2)Indoor Unit installation

The mounting floor should be strong and solid enough to prevent it from vibration.

Drill the piping hole with 70mm diameter holecore drill at either the right or the left of indoor unit. The hole should be sightly slant to the outdoor side.

	200mm
70mm	90mm	70mm
		Wall

Core Drill

3)Outdoor unit Installation

Install the outdoor unit on the concrete or any solid base securely and horizontally.

If there is any vibration transmitted to the building, mount the rubber underneath the outdoor unit.

4)Refrigerant amount

Before shipment, this air conditioner is filled with the rated amount of refrigerant including additional amount required for air-purging, subject to 5m piping length. (The rated amount of refrigerant is indicated on the name plate.) But when the piping length exceeds 5 meters, additional charge is required according to the following table.

	(Unit: g)
MODEL	REFRIGERANT CHARGE
80K	80 per 1m

Example) 72K~80K

In case of 10m long pipe(one-way), the amount of refrigerant to be replenished is:

(10 - 5) × 80 = 400g

–17–

5-2. Installation Method

1) Procedure

No.	Installation works	Descriptions
1	Preparation of tools and installation parts	Preparation of installation
2	Flaring the pipes	To insert the flare nuts, mounted on the
		connection parts of both indoor and
		outdoor unit, onto the copper pipes.
3	Pipe bending	To reduce the flow resistance of refrigerant.
4	Connection of installation parts	Connection of long piping
	(elbows, socket etc)
5	Tighten the flare nut (outdoor)	Connecting the pipings of the outdoor unit.
6	Blowing the pipings	To remove dust and scale in working.
7	Tighten the flare nut (indoor)	Connecting the pipings of the indoor unit.
8	Check a gas-leakage of the connecting
	part of the pipings.
9	Air purging of the piping and indoor unit	The air which contains moisture and which
		remains in the refrigeration cycle may cause a malfunction on the
		compressor
10	Open the 3-way (liquid side) and
	3-way (gas side) valves.
11	Form the pipings	To prevent heat loss and sweat
12	Checking the drainage (indoor unit)	To ensure if water flow drain hose of indoor unit.
13	Connecting the cable between outdoor	Preparation of the operating
	and indoor unit
14	Connecting the main cable to outdoor unit
15	Supply the power to the crankcase heater	To prevent the liquid back to the compressor.
	(Before the operating the unit)	(Heat pump only)
16	Cooling operation
	(Use the remote control or display of the
	indoor unit)

–18–

2) Preparation of installation parts and tools

No.	Installation Parts, Tools	Use
1	Pipe cutter (MAX 35mm Copper pipe)	Cutting the pipings
2	Remear	Remove burrs from cut edges of pipes.
3	Wrench (H5, H4 hexagonal wrench)	To open the service valve
4	Pipe bender	Bending the pipings
5	Leak detector	Check a gas-leakage of connecting part
		of the pipings
6	Manifold gauge	To measure the pressure, to charge the refrigerant
7	Charge-nipple	To connect the bombe
8	Vacuum pump	To remove the air in the pipe.
9	Charge cylinder balance	To measure the refrigerant amount
10	Bombe (Freon-22)	Gas charge
		Air purge
		Cleaning the pipe
11	Spanner	To tighten the connecting parts of the pipings

12Monkey spanner

13Driver( , )

14	Benchi (150mm)	Cutting the wires
15	Tapeline	To measure the length
16	Core drill	To make holes through the concrete wall and blocks
17	Voltmeter, Amperemeter, Clampmeter	To measure the current and voltage
18	Insulation resistance tester	To measure the insulation resistance
19	Glass thermometer	To measure the intake and outlet air temperature of the indoor unit
20	Copper tubes	To use the connecting pipings
21	Insulation material	To cover the connecting pipings
22	Tape	To finish the connecting pipings
23	Electrical Leakage Breaker	To shut off the main power
24	Cable	To connect the cable from outdoor unit to indoor unit
27	Drain hose sockets, elbows	To remote the condensing water

–19–

5-3. Piping of Indoor Unit

1) Preparation of piping

Cut the pipes and the cable

•Use the accessory piping kit or the pipes purchased locally.

•Measure the distance between the indoor and the outdoor unit.

•Cut the pipes a little longer than measured distance.

•Cut the cable 1.5m longer than the pipe length.

Remove burrs.

•Remove burrs from cut edges of pipes.

•Turn the pipe end down to avoid the metal powder entering the pipe.

Caution:

If burrs are not removed, they may cause a gas leakage.

Pipe cutter

90° Slanted Rough

Pipe

Reamer

Point down

2) Connection of piping

Move the indoor tubing and drain hose to the hole

•Remove tubing holder and pull the tubing out of the chassis.

Replace the tubing holder into original position

Route the tubing and the drain hose staight backwards.

Insert the connecting cable into the indoor unit through the hole.

•Do not connect the cable to the indoor unit

•Make a small loop with the cable for easy connection later.

Tape the tubing and the connecting cable.

Indoor unit installation.

Connecting the pipings to the indoor unit.

•Align the center of the pipings and suffciently tighten the flare nut with fingers.

•Finally, tighten the flare nut with troque wrench until the wrench clicks.

When tightening the flare nut with troque wrench, ensure the direction for tightening follows the arrow on the wrench.

–20–

	3) Precautions in bending
	If it is necessary to bend or stretch the tubing,	Spring
	use the spring which is attached to the tubing in
	stead of pipe bender.

• Please make a careful notice to make a smooth line.

•Hold the tubing with your two hands closely and then bend or stretch it slowly not to make any crack.

•Remember that the radius (R) should not exceed 70mm (Refer to Fig. 1)

Do not repeat the bending process to prevent the tubing from cracking or crushing.

Keep in mind that the bending part should not be cracked and make the radius (R) as long as possible (Refer to Fig. 2)`

R70mm

(Fig. 1)

R

(Fig. 2)

5-4. Connecting Piping to Outdoor Unit

1) Connecting pipings to the outdoor unit

Upon connecting 4-way valves, please weld connecting pipes using elbows instead of connecting pipes with flare nuts.

5-5. Connecting the Cable

Open the control board cover from the outdoor unit by removing the screws.

Connect wires to the terminals on the control board individually and secure the cables onto the control board with clamp.

–21–