Technibel climatisation Mcav92c5ta series User manual

Contents Page

IMPORTANT!

Please Read Before Starting................................. 1

1. Selection of Installation Site ............................... 2

2. Place and Space for Installation ........................ 3

3. Wiring ................................................................. 5

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

5. Insulation of Refrigerant Tubing ......................... 9

6. Tubing to be Used .............................................. 9

7. Tubing Connection ............................................. 9

8. Air Purging ....................................................... 10

■Air Purging with a Vacuum Pump (for Test Run)

■Service Valve Construction

■Pump Down

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Model Combinations

Combine indoor and outdoor units only as listed

below. Three indoor units are combined with one

outdoor unit. Each indoor unit can be operated at

the same time or independently.

Indoor Units Outdoor Unit

Combination example

Indoor unit B

Indoor unit A

Outdoor unit

Indoor unit C

With the optional Dual System Kit

DKR8585C, four indoor units can

be connected in the combination

below.

Indoor Units Outdoor Unit

GRV340M3C5TA-

MCAV92C5TA-/CAV92C5TA- x 4

DKR8585C

•For details of its installation, refer to the instruction

manual of DKR8585C.

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37.4163.208.0 01/02

NOTE

INSTALLATION INSTRUCTIONS

- Multi Split system air conditioner -

MCAV92C5TA-/CAV92C5TA- x2

GRV340M3C5TA-

MCAV/KPAV180C5VA-

x 1

Power Source:

220/230/240 V, Single-phase, 50 Hz

IMPORTANT!

Please Read Before Starting

This air conditioning system meets strict safety and

operating standards. As the installer or service person,

it is an important part of your job to install or service the

system so it operates safely and efficiently.

For safe installation and trouble-free operation,

you must:

●Carefully read this instruction booklet before beginning.

●Follow each installation or repair step exactly as shown.

●Observe all local, state, and national electrical codes.

●Pay close attention to all warning, and caution notices

given in this manual.

This symbol refers to a hazard or

unsafe practice which can result

in severe personal injury or

death.

This symbol refers to a hazard or

unsafe practice which can result

in personal injury or product or

property damage.

If Necessary, Get Help

These instructions are all you need for most installation

sites and maintenance conditions. If you require help for a

special problem, contact our sales/service outlet or your

certified dealer for additional instructions.

In Case of Improper Installation

The manufacturer shall in no way be responsible for

improper installation or maintenance service, including fail-

ure to follow the instructions in this document.

SPECIAL PRECAUTIONS

When Wiring

ELECTRICAL SHOCK CAN

CAUSE SEVERE

PERSONAL INJURY OR

DEATH. ONLY A

QUALIFIED, EXPERIENCED

ELECTRICIAN SHOULD

ATTEMPT TO WIRE THIS

SYSTEM.

•Do not supply power to the unit until all wiring and

tubing are completed or reconnected and checked.

•Highly dangerous electrical voltages are used in this

system. Carefully refer to the wiring diagram and these

instructions when wiring. Improper connections and

inadequate grounding can cause accidental injury or

death.

•Ground the unit following local electrical codes.

•Connect all wiring tightly. Loose wiring may cause over-

heating at connection points and a possible fire hazard.

When Transporting

Be careful when picking up and moving the indoor and

outdoor units. Get a partner to help, and bend your knees

when lifting to reduce strain on your back. Sharp edges or

thin aluminum fins on the air conditioner can cut your

fingers.

When Installing...

...ln a Ceiling, Wall or Floor

Make sure the ceiling/wall/floor is strong enough to hold

the unit’s weight. It may be necessary to construct a

strong wood or metal frame to provide added support.

...ln a Room

Properly insulate any tubing run inside a room to prevent

“sweating”that can cause dripping and water damage to

walls and floors.

...ln Moist or Uneven Locations

Use a raised concrete pad or concrete blocks to provide a

solid, level foundation for the outdoor unit. This prevents

water damage and abnormal vibration.

...ln an Area with High Winds

Securely anchor the outdoor unit down with bolts and a

metal frame. Provide a suitable air baffle.

...ln a Snowy Area (for Heat Pump-type Systems)

Install the outdoor unit on a raised platform that is higher

than drifting snow. Provide snow vents.

When Connecting Refrigerant Tubing

•Use the flare method for connecting tubing.

•Apply refrigerant lubricant to the matching surfaces of

the flare and union tubes before connecting them, then

tighten the nut with a torque wrench for a leak-free

con-nection .

•Check carefully for leaks before starting the test run.

NOTE:

Depending on the system type, liquid and gas lines may

be either narrow or wide. Therefore, to avoid confusion the

refrigerant tubing for your particular model is specified as

either “narrow”or “wide”rather than as “liquid”or “gas.”

When Servicing

•Turn the power OFF at the main power box (mains)

before opening the unit to check or repair electrical

parts and wiring.

•Keep your fingers and clothing away from any moving

parts.

•Clean up the site after you finish, remembering to

check that no metal scraps or bits of wiring have been

left inside the unit being serviced.

Others •In case the refrigerant gas

leaks during installation work,

ventilate well the work place.

If the refrigerant gas contacts

with fire, poisonous gas might

be generated.

•Upon completion of the

installation work, make sure

that there is no leak of the

refrigerant gas. If the leaked

refrigerant gas contacts with

fire such as stove or fan

heater, poisonous gas might

be generated.

!WARNING

CAUTION

WARNING

English

•Max. allowable tubing length at shipment

A + B: 15 m

(Make sure that the tubing length of A or

B should not be shorter than 2 m.)

C: 7.5 m (Refer to Fig. 1-2.)

•Limit of tubing length

A + B: 25 m

(Make sure that the tubing length of

A or B should be 15 m as maximum.)

C: 20 m (Refer to Fig. 1-2.)

When connecting 2 indoor units of MCAV97 (C1and C2

connected) by additionally connecting the optional

Dual System Kit (DKR8585C), the limit of tubing

length of C1+ C2should be same as that of A + B.

(Refer to Fig. 1-3.)

•In the following cases, an additional refrigerant

is required. Required amount of

additional

refrigerant (g/m)

a) Total tubing length (A + B) 15 g/m

is longer than 15 m

b) Total tubing length of C 25 g/m

is longer than 7.5 m

No additional charge of compressor oil is required.

English

1. Selection of Installation Site

Maximum Allowable Tubing Length (L) and Elevation Difference (H)

Fig. 1-1

INDOOR

UNIT

Tubing length (L)

Less than elevation

difference (H) between

the 2 units

OUTDOOR

UNIT

The Multi-Split System outdoor unit should be

installed as close to the indoor units as possible.

Maximum allowable length of the refrigerant tubing

and elevation difference between outdoor and indoor

units are shown in Table 1.

Table 1

Limit of elevation Required amount

Combination difference (H) of additional

Outdoor unit Indoor unit (m) refrigerant* (g/m)

MCAV92/CAV92 7a) 15

GRV340 MCAV-KPAV180 7b) 25

NOTE

MCAV92

MCAV180

GRV340

Fig. 1-2

MCAV92

GRV340

DKR8585C

Fig. 1-3

KPAV180

CAV92

2. Place and Space for Installation

●Choose a place as cool as possible. The place

should be well ventilated, and the intake air should

not be hotter than the outside temperature. (max.

45 °C)

●Avoid the vicinity of heat sources, exhaust fans,

etc. (Fig. 2-1)

●Required space around the outdoor unit for free air

flow and servicing is given in Fig. 2-2.

When using the Dual System Kit, be sure to keep a

separation of 25 cm as minimum between the air

intake of the outdoor unit (rear surface) and wall or

fence for maintenance work.

To avoid the effects of humidity and ground moisture,

the unit should be placed on concrete blocks or slab

at least 10 cm high above ground level. (Fig. 2-3)

The unit must be level and be anchored securely to its

base with anchor bolts or the like. An unsteady

foundation will cause abnormal noise and vibration.

(Fig. 2-3)

Depending on the ambient temperature during

operation of the outdoor unit, the dews may

adhere or may be frozen onto the service valves.

When the outdoor unit is to be installed in a place

where these dew drops may cause some

problem, provide the heat insulation for the

service valves or provide a plate under the

service valves to receive the dew drops.

CAUTION

Fig. 2-1

Hot air

Exhaust fan

Heat source

Outdoor unit

Air intake Min. 15 cm

Air discharge Min.

50 cm

Valve

side

Min.

60 cm

Min.

15 cm

Obstacle above

Ground

2 m 2 m

Air discharge

Obstacle

Fig. 2-2

Min.

10 cm

Fig. 2-3

NOTE

Air discharge chamber for top discharge

You should install an air discharge chamber in the

field when:

●It is difficult to provide a minimum space of 50 cm

between the air discharge outlet and a nearby

obstacle.

●The air discharge faces a sidewalk and hot air will

be directed toward passersby. (Figs. 2-4 and

2-5)

English

Fig. 2-4

Air discharge

Material: Galvanized sheet

Thickness: 1.0

NOTE

Fig. 2-5

Air discharge chamber

8 - 6 mm dia.

holes

(Unit: mm)

3. Wiring

3-1 General Precautions on Wiring

●Check the rated voltage on the unit's name plate

before wiring according to the wiring diagram.

(Fig. 3-1)

●Provide a power outlet to be used exclusively for

each unit, with a power supply disconnect and a

circuit breaker for overcurrent protection provided

in the exclusive line.

●To prevent possible hazards due to insulation

failure, the unit must be grounded.

●Each wire must be connected firmly.

●No wire should be allowed to touch refrigerant

tubing, the compressor or any moving parts of fan

motors.

Regulations on wire diameters differ according to

national and local requirements. For field wiring

regulations, please refer to the LOCAL ELECTRICAL

CODES before starting, and carefully follow the

regulations as you do the installation.

●Do not supply power to the system untill all

wiring and refrigerant tubing connections are

completed and checked.

●Wiring should only be done by an experienced,

qualified electrician.

Table 2 lists recommended wire lengths and

diameters for power supply systems. Refer to the

Wiring Diagram above for the meaning of "A" and "B"

in Table 2.

Wiring Diagram

This appliance must be

grounded.

Units A, B........ MCAV92/CAV92

Unit C.............. MCAV/KPAV180

!WARNING

#... AWG (American Wire Gauge)

(A) Power Supply Line Length (m) (B) Inter Line Length (m)

Fuse or

Cross - Sectional Area Circuit Capacity

3.5 mm25.5 mm22 mm2

(# 12) (# 10) (# 14)

14 m 22 m 20 m 30 A

WARNING

(B)

(A)

Unit A

Earth (ground)

Disconnect

swith

(Field supply)

Indoor unit

Outdoor unit

Power supply

220 –240 V

~50Hz

Terminal 3P

Terminal 8P

Terminal 5 P

Grounding

Line

Unit B

Unit C

Fig. 3-1

NOTE

Table 2

Supply power wire A:

Multipolar electric wire. Size and length of the suggested electric wire are showed on table “electrical data”. The wire must be

Mod. H05VV-F (according to CEI 20-19 CENELEC HD 22). Make sure the length of the conductors between the fixing point and

the terminals allows the straining of the conductors L, N before that of the grounding.

Connecting wire B (with ground conductor):

Multipolar electric wire; size and length of the suggested electric wire are showed on table “electrical data”. The wires have not

to be lighter than Mod. H07RN-F (according to CEI 20-19 CENELEC HD22).

Connecting wire C (without ground conductor):

Multipolar electric wire; size and length of the suggested electric wire are showed on table “electrical data”. The wires have not

to be lighter than Mod. A07RN-F (according to CEI 20-19 CENELEC HD22).

■Examples of Incorrect Wiring

The following are examples of improper wiring that result in system misoperation. You should confirm that you

have wired the units correctly before beginning the test run. (Refer to Fig. 3-1.)

Problem 1

•Compressor will start.

Only outdoor unit will operate.

Problem 2

•Air conditioner will not operate.

Problem 3

•Compressor will not start; only indoor unit will operate.

English

CAUTION

(A)

Grounding line or or

Indoor unit Outdoor unit

(B)

Grounding line or or

Indoor unit Outdoor unit

(C)

Indoor unit Outdoor unit

Grounding line or or

(D)

Indoor unit Outdoor unit

Grounding line or or

(E)

Indoor unit Outdoor unit

Grounding line or or

Loose wiring may cause

the terminal to overheat or

result in unit malfunction.

A fire hazard may also

exist. Therefore, be sure

all wiring is tightly

connected.

When connecting each power wire to the

corresponding terminal, follow instructions "How to

connect wiring to the terminal" and fasten the wire

securely tight with the fixing screw of the terminal

plate.

How to connect the wiring to the terminal

■For solid core wiring (or F-cable)

(1) Cut the wire end with a cutting pliers, then strip

the insulation to expose the solid wire about

25 mm (Fig. 3-2).

(2) Using a screwdriver, remove the terminal

screw(s) on the terminal plate.

(3) Using with the pliers, bend the solid wire to form

a loop suitable for the terminal screw.

(4) Shape the loop wire properly, place it on the

terminal plate and fix it securely with the removed

terminal screw using a screwdriver.

■For strand wiring

(1) Cut the wire end with a cutting pliers, then strip

the insulation to expose the strand wiring about

10 mm (Fig. 3-3).

(2) Using a screwdriver, remove the terminal

screw(s) on the terminal plate.

(3) Using a round terminal fastener or pliers,

securely clamp each stripped wire end with a

round terminal (Fig. 3-3).

(4) Place the round terminal wire, and replace and

tighten the removed terminal screw using a

screwdriver (Fig. 3-4).

WARNING

Fig. 3-2

Fig. 3-3

Loop

Insulation

Round

terminal

Solid wire

Strand wire

Strip 25 mm

Strip 10 mm

Fig. 3-4

Round terminal

Screw with

special washer

Screw with

special washer

Terminal plate

Wire

Round

terminal

4. Refrigerant Tubing

4-1 Use of the Flaring Method

Many of the conventional split system air conditioners

employ the flaring method to connect refrigerant tubes

which run between indoor and outdoor units. In this

method, the copper tubes are flared at each end and

connected with flare nuts.

4-2 Flaring Procedure with a Flare Tool

a) Cut the copper tube to the required length with a

tube cutter. It is recommended to cut approx. 30 –

50 cm longer than the tubing length you estimate.

b) Remove burrs at the end of the copper tube with a

tube reamer or file. This process is important and

should be done carefully to make a good flare.

(Fig. 4-1)

When reaming, hold the tube end downward and be

sure that no copper scraps fall into the tube.

(Fig. 4-2)

c) Remove the flare nut from the unit and be sure to

mount it on the copper tube.

d) Make a flare at the end of copper tube with a flare

tool.* (Fig. 4-3) (*Use "RIGID" or equivalent.)

A good flare should have the following characteristics:

●inside surface is glossy and smooth.

●edge is smooth.

●tapered sides are of uniform length.

4-3 Caution before Connecting Tubes Tightly

a) Be sure to apply a sealing cap or water-proof tape

to prevent dust or water from getting into the tubes

before they are used.

b) Be sure to apply refrigerant lubricant to the

matching surfaces of the flare and union before

connecting them together. This is effective for

reducing gas leaks. (Fig. 4-4)

c) For proper connection, align the union tube and

flare tube straight with each other, then screw in

the flare nut lightly at first to obtain a smooth

match. (Fig. 4-5)

English

NOTE

Fig. 4-1

Deburring

AfterBefore

Fig. 4-2

Copper

tubing

Reamer

Fig. 4-3

Flare tool

Flare nut Copper

tubing

Fig. 4-5

Union Flare nut

Fig. 4-4

Apply refrigerant

Iubricant here and here

5. Insulation of Refrigerant Tubing

This outdoor unit uses a system of capillary tubes, which cause

both the wide and narrow tubes to become cold.

To prevent heat loss and condensation, these tubes must be

adequately insulated. Thickness of the insulation material should

be a minimum of 8 mm.

Insulation Material

The insulation material must have good insulating characteristics,

must be easy to use, be age resistant, and must not easily absorb

moisture. Either polyethylene or foam rubber insulation is

recommended.

When applying the insulation, first connect the refrigerant tubing to

the outdoor unit. After performing a leak test on the connecting

part, insulate it, then wrap it with vinyl masking tape.

6. Tubing to be Used

Deoxidized annealed copper tube must be used for the refrigerant

tubing. The diameter and thickness are listed in Table 3.

Table 3

7. Tubing Connection

Tighten up the union connection portion of the indoor unit using

a double spanner. (Fig. 7-1)

Connect both the wide and narrow tubes of the outdoor unit.

(Fig. 7-2)

When using the torque wrench, be sure to apply the correct torque

according to the tubing diameter as given in Table 4.

Table 4

Fig. 7-1

Indoor unit

Outdoor unit

Fix

Torque wrench

Tubing Diameter Tightening Torque

6.35 mm Approx. 150 – 200 kg-cm

9.52 mm Approx. 350 – 400 kg-cm

12.7 mm Approx. 500 – 550 kg-cm

Combination Narrow Tubing Wide Tubing

Outdoor unit Indoor unit Outer Dia. Thickness Outer Dia. Thickness

GRV340 MCAV92/CAV92 6.35 mm 0.8 mm 9.52 mm 0.8 mm

MCAV/KPAV180 6.35 mm 0.8 mm 12.7 mm 0.8 mm

min.

8 mm

Fig. 5-1

Insulation

Thickness:

min. 8mm

Min.

8mm

CAUTION

After a tube has

been insulated,

never try to bend it

into a narrow

curve, as this may

cause the tube to

break or crack.

Insulation

Fig. 5-2

NOTE Unit A, B ........ MCAV92/CAV92

Unit C............. MCAV/KPAV180

Fig. 7-2

Narrow

tube

Wide tube

Unit A

Narrow

tube

Wide tube

Unit B

Wide tube

Narrow

tube *Capi box

Unit C

* Remove this capi box when installing the

optional Dual System Kit (DKR8585C).

English

L H

Fig. 8-1

Indoor units

Outdoor unit

Unit

Unit A

Unit B

Unit C

8. Air Purging

Air and moisture remaining in the refrigerant system have

undesirable effects as indicated below.

●pressure in the system rises

●operating current rises

●cooling (or heating) efficiency drops

●moisture in the air circuit may freeze and block the

capillary tubing

●water may lead to corrosion of parts in the refrigerant

system

■Air Purging with a Vacuum Pump (for Test Run)

Preparation

Check that each tube (both narrow and wide tubes) between

the indoor and outdoor units have been properly connected and

all wiring for the test run has been completed. Remove the

valve caps from both the wide and narrow tube service valves

on the outdoor unit. Note that both narrow and wide tube

service valves on the outdoor unit are kept closed at this stage.

Air Purge

For leak testing the indoor units (A, B, C), there are two

methods; using nitrogen gas or outdoor unit's gas according

to the installation site conditions. The respective procedures

are described below.

1) Using Nitrogen Gas (Unit A)

a) Leak test

(1) With the service valves on the outdoor unit remaining

closed, remove the valve cap on the wide and wide

tube service valve. (Save the valve cap for reuse.)

(2) Connect a manifold valve (with pressure gauges) and

dry nitrogen gas cylinder to this service port with charge

hose. (Fig. 8-1)

(3) Pressurize the system to no more than 10 kg/cm2with

dry nitrogen gas and close the cylinder valve when the

gauge reading reaches10 kg/cm2. Next, test for leaks

with liquid soap.

Be sure to use a manifold valve for

air purging. If it is not available, use

a stop valve for this purpose. The

"Hi" knob of the manifold valve

must always be kept closed.

CAUTION

To avoid nitrogen entering the

refrigerant system in a liquid state,

the top of the cylinder must be

higher than its bottom when you

pressurize the system. Usually, the

cylinder is used in a vertical

standing position. (Fig. 8-1)

CAUTION

Nitrogen gas cylinder

(in a vertical standing

position)

Charge hose

Manifold

valve

(4) Leak test all joints at the tubing (indoor and

outdoor) with liquid soap. Bubbles indicates a

leak. Be sure to wipe off the soap with a clean

cloth.

(5) After the system is found to be free of leaks,

relieve the nitrogen pressure by loosing the

charge hose connector at the nitrogen cylinder.

When the system pressure is reduced to

normal, disconnect the hose from the cylinder.

b) Evacuation

(1) Connect a vacuum pump with charge hose.

(Fig. 8-2)

(2) With the "Lo" knob of the manifold valve open,

run the vacuum pump. The operation time for

the vacuum pump varies with tubing length and

capacity of the pump. The following table

shows the amount of time for evacuation:

Note: The rquired time in the above table is

calculated based on the assumption that the

ideal (or target) vacuum condition is around

10 mmHg abs.

(3) With the vacuum pump still running, close the

"Lo" knob of the manifold valve. Then stop the

vacuum pump.

Required time for evacuation when capacity of

100 liter/h vacuum pump is used

If tubing length is If tubing length is

less than 10 m longer than 10 m

10 min. or more 15 min. or more

L H

Fig. 8-2

Indoor units

Outdoor unit

Vacuum pump

Unit A

Unit B

Unit C

Manifold

valve

Unit

c) Finishing job

(1) With the hexagonal wrench, turn the wide tube

service valve stem counterclockwise to fully

open the valve.

(2) Turn the narrow tube service valve stem

counterclockwise to fully open the valve.

(3) Loosen the vacuum hose connected to the

wide tube service port. Then, remove the hose.

(4) Replace the bonnet and flare nut on the wide

tube service port and fasten the flare nut

securely with an adjustable wrench or box

wrench. Next, mount the valve cap and tighten

it with a torque wrench (the cap needs to be

tightened with the torque of 200 kg-cm).

This process is very important to prevent

gas from leaking from the system.

Purge units B and C in the same manner explained

above.

This completes air purging with a vacuum pump and

the air conditioner is ready to test run.

(To be continued to page 15)

English

NOTE

2) Using Outdoor Unit's Gas (Units A & B)

a) Evacuation

(1) Connect a vacuum pump and a manifold valve

(with pressure gauges) to the service port on the

wide tube service valve for unit A. (Figs. 8-3 )

(2) With the "Lo" knob of the manifold valve open,

run the vacuum pump. The operation time for

the vacuum pump varies with tubing length and

capacity of the pump. The following table

shows the amount of time for evacuation:

Note: The rquired time in the above table is

calculated based on the assumption that the

ideal (or target) vacuum condition is around

10 mmHg abs.

(3) With the vacuum pump still running, close the

"Lo" knob of the manifold valve. Then stop the

vacuum pump.

Be sure to use a manifold

valve for air purging. If it is

not available, use a stop valve

for this purpose. The "Hi"

knob of the manifold valve

must always be kept closed.

CAUTION

Required time for evacuation when capacity of

100 liter/h vacuum pump is used

If tubing length is If tubing length is

less than 10 m longer than 10 m

10 min. or more 15 min. or more

L H

Fig. 8-3

Indoor units

Outdoor unit

Vacuum pump

Unit A

Unit B

Unit C

Manifold

valve

Unit

b) Leak test

(1) After confirming the power is off, disconnect the

connector (GRN) (between timer and terminal 5)

to separate A and B parts. (Fig. 8-4 ) Then

connect part A of this connector (GRN) with the

connector C (BLU) and turn on the power

source. (Fig. 8-5 )

(2) With the hexagonal wrench, turn the valve stem

on the narrow tube service valve

counterclockwise by 90 degrees (1/4 turn) for

10 seconds, and then turn the stem clockwise

to close it again. (Fig. 8-6)

(3) Leak test all joints at the tubing (both indoor

and outdoors) with liquid soap. Bubbles

indicate a leak. Be sure to wipe off the soap

with a clean cloth.

c) Finishing job

(1) With the hexagonal wrench, turn the wide tube

service valve stem counterclockwise to fully

open the valve.

(2) Turn the narrow tube service valve stem

counterclockwise to fully open the valve.

(3) Loosen the vacuum hose connected to the

wide tube service port. Then, remove the hose.

(4) Replace the bonnet and flare nut on the wide

tube service port and fasten the flare nut

securely with an adjustable wrench or box

wrench. Next, mount the valve cap and tighten

it with a torque wrench (the cap needs to be

tightened with the torque of 200 kg-cm).

This process is very important to prevent

gas from leaking from the system.

(5) Turn off the power source.

(6) Connect parts A and B of the connector

(GRN) as original state. (Fig. 8-4)

To air purge unit C, perform steps (2) and (3) of

b) Leak test and then steps (1) to (4) of c) Finishing

job in order.

This completes air purge with a vacuum pump. The

air conditioner is now ready to test run.

(To be continued to page 15)

English

Be sure to completely insert

the hex wrench before

attempting to turn the valve.

CAUTION

NOTE

BLU

GRN

TERMINAL 8P

OUTDOOR UNIT

TERMINAL 5P

Fig. 8-4

Fig. 8-5

Fig. 8-6

Hex wrench

Narrow tube

Wide tube

Vacuum

hose to

manifold

value

Valve cap

90°(1/4 turn)

GRN (A) BLU (C)

* How to Test Run the Air Conditioner.

(1) Turn on the power source.

(2) Set the operation selector switch of the indoor

unit to the TEST position. This starts the fans,

producing uncooled forced air with the

OPERATION or OPR lamp lit. (Fig. 8-7)

(3) After 3 minutes, the system shifts into cooling

operation, and cool air will start to be felt.

Cooling operation with the switch at the TEST

position is unaffected by the room temperature.

(4) After stopping the test run, turn the operation

selector switch of the indoor unit to the OFF

position once , then move to ON position.

(5) Press the ON/OFF button on the remote control

unit to stop the air conditioner.

After finishing the test run,

do not leave the switch at the

TEST RUN position.

CAUTION

■Service Valve Construction

●Valve Position -a-

The valve stems of both wide and narrow tubes

are turned all the way in. The unit is shipped from

the factory in this position. (Fig. 8-8a)

●Valve Position -b-

The valve stems of both wide and narrow tubes

are turned all the way out ("BACK SEAT" position).

This is the normal operating positions. (Fig. 8-8b)

●Valve Position -c-

With the narrow tube valve kept at BACK SEAT,

only the wide tube valve stem is turned to the

halfway-down position. This position is used for

pressure measurement and gas charging.

(Fig. 8-8c)

■Pump Down

Pump Down means collecting all refrigerant in the

outdoor unit without losing refrigerant gas.

Pump Down is used when the unit is to be relocated

or the refrigerant circuit is serviced.

Pump Down Procedure

Be sure to carry out pump down in cooling

operation

1) Connect a low-pressure gauge manifold hose to

the charge port on the wide tube service valve.

2) Lower the stem of the wide tube service valve to

position -c- and purge the air from the manifold

hose using the refrigerant gas.

3) Turn the narrow tube service valve all the way in

(position -a-).

4) Turn on the unit's operating switch and start

cooling operation.

5) When the low-pressure gauge reading falls to 1 to

0.5 kg/cm2, fully close the wide tube valve stem

(position -a-), and then quickly turn off the unit. At

that time, Pump Down has been completed and all

refrigerant gas will have been collected in the

outdoor unit.

English

When opening or closing

the service valve stem,

use the accessory hex

wrench.

Hex

wrench

Open

Fig. 8-9

CAUTION

Wide Tube Narrow Tube

Fig. 8-8a Condition at Shipping (-a-)

Fig. 8-8b Condition for Operation (-b-)

Fig. 8-8c Condition at Gas Charging (-c-)

Valve cap

O-ring

Stem

CAUTION

Both units A and B must be

carry out pump down at the

same time.

R.D. 28 Reyrieux BP 131 - 01601 Trévoux CEDEX France

Tél. 04.74.00.92.92 - Fax 04.74.00.42.00

R.C.S. Bourg-en-Bresse B 759 200 728

In order to carry on a constant improvement, our products can be modified without prior notice.

Per garantire un costante miglioramento dei nostri prodotti, ci riserviamo di modificarli senza preavviso.

Par souci d’amélioration constante, nos produits peuvent être modifiés sans préavis.

Unsere Produkte werden laufend verbessert und können Vorankündigung abgeändert Werden.

En el interés de mejoras constantes, nuestros productos pueden modificarse sin aviso prévio.

S.A.C. - Printed in italy

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