Electra Alpha 12 Service Manual Download

Page: 114 / 114

Attached accessories.

INDOOR UNIT

OUTDOOR UNIT

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

There should hot be any animal or plant which
could be affected by not air discharged.

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

Do not place any obstacles which may cause a
short circuit of the discharged air.

If piping length is over 10m, additional
refrigerant should be added as shown in the
outdoor unit lable.

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

There should not be any obstacles blocking the
air circulation.

A place where air circulation in the room is
good.

A place where drainage can be easily done.

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.

Recommended installation height for indoor
unit shal be at least 2.3m.

SAFETY PRECAUTIONS

ENGLISH

Read the following "SAFETY PRECAUTIONS" carefully before installation.
Electrical work must be installed by a licensed electrician. Be sure to Use the correct rating of the power plug and main circuit for the model to be installed.
The caution items stated here must be followed because these important contents are related to safety. The meaning lf each indication used is as below.
Incorrect installation due to ignoring of the instruction will cause harm or damage, and the seriousness is classified by the following indications.

This indication shows the possibility of causing death or serious injury.

WARNING

The items to be followed are classified by the symbols:

Symbol with background white denotes item that is PROHIBITED from doing.

Carry out test running to confirm that no abnormality occurs after the installation. Then, explain to user the operation, care and maintenance as
stated in instructions. Please remind the customer to keep the operating instructions for future reference.

WARNING

1) Use qualified installer and follow careful this instructions. Otherwise it will cause electrical shock, water leakage, or esthetic problem.

2) Install at a strong and firm location which is able to withstand the set's weight. If the strength is not enough or installation is not properly done, the set will drop and

cause injury.

3) For electrical work, follow the local national wiring standard, regulation and this installation instruction. An independent circuit and single outlet must be used. If

electrical circuit capacity is not enough or defect found in electrical work, it will cause electrical shock or fire.

4) Use the specified cable and connect tightly for indoor/outdoor connection. Connect tightly and clamp the cable so that no external force will be acted on the terminal.

If connection or fixing is not perfect, it will cause heat-up or fire at the connection.

5) Wire routing must be properly arranged so that control board cover is fixed properly. If control board cover is not fixed perfectly, it will cause heat-up at connection

point of terminal, fire or electrical shock.

6) When carrying out piping connection, take care not to let air substances other than the specified refrigerant go into refrigeration cycle. Otherwise, it will cause lower

capacity, abnormal high pressure in the refrigeration cycle, explosion and injury.

7) Do not damage or use unspecified power supply cord. Otherwise, it will cause fire or electrical shock.

8) Do not modify the length of the power supply cord or use of the extension cord, and do not share the single outlet with other electrical appliances.

Otherwise, it will cause fire or electrical shock.

9) This equipment must be earthed. It may cause electrical shock it grounding is not perfect.

10) Do not install the unit at place where leakage of flammable gas may occur. Incase gas leaks and accumulates at surrounding of the

unit, it may cause fire.

11) Carry out drainage piping as mentioned in installation instructions. If drainage is not perfect, water may enter the room and damage the furniture.

ATTENTION

2) Power supply connection to the room air conditioner.
Connect the power supply cord of the room air conditioner to the mains using one of the following method.
Power supply point shall be the place where there is ease for access for the power disconnection in case of emergency.
In some countries, permanent connection of this room air conditioner to the power supply is prohibited.
1) Power supply connection to the receptacle using a power plug.

Use an approved 10A power plug with earth pin for 2.1-3.6kW and 15A for 5.0kW for the connection to the receptacle.

2) Power supply connection to a circuit breaker for the permanent connection. Use an approved 10A circuit breaker for

and 15A for 5.0kW for the

permanent connection. It must be a double pole switch with a minimum 3mm contact gap.

2.1-3.6kW

5) Do not install this appliance in a laundry room or other location where water may drip from the ceiling, etc.

4) Installation work.
It may need two people to carry out the installation work.

3) Do not release refrigerant.
Do not release refrigerant during piping work for installation, reinstallation and during repairing a refrigeration parts. Take care of the liquid refrigerant. it may cause

frostbite.

1) Selection of the installation location.
Select a installation location which is rigid and strong enough to support or hold the unit, and select a location for easy maintenance.

Required tools for Installation Works

7. Knife
8. Gas leak detector
9. Measuring tape
10. Thermometer
11. Megameter
12. Multimeter

13. Torque wrench

18 N

m (1.8 kgf.m)

35 N

m (3.5 kgf.m)

55 N

m (5.5 kgf.m)

14. Vacuum pump
15. Gauge manifold

(for R-410A)

1. Screw driver
2. Electric drill, hole core drill
( 60 mm)
3. Hexagonal wrench
4. Spanner
5. Pipe cutter
6. Reamer

New Refrigerant Air Conditioner Installation

THIS AIR CONDITIONER ADOPTS THE NEW HFC REFRIGERANT (R410A) WHICH DOES NOT DESTROY OZONE LAYER.

R410A refrigerant is apt to be

affected by impurities such as water, oxidizing membrane, and oils because the working pressure of R410A refrigerant is approx. 1.6 times of refrigerant R22.
Accompanied with the adoption of the new refrigerant, the refrigeration machine oil has also been changed. Therefore, during installation work, be sure that water,
dust, former refrigerant, or refrigeration machine oil does not enter into the new type refrigerant R410A air conditioner circuit.
To prevent mixing of refrigerant or refrigerating machine oil, the sizes of connecting sections of charging port on main unit and installation tools are different from
those used for the conventional refrigerant units. Accordingly, special tools are required for the new refrigerant (R410A) units. For connecting pipes, use new and
clean piping materials with high pressure fittings made for R410A only, so that water and/or dust does not enter. Moreover, do not use the existing piping because
there are some problems with pressure fittings and possible impurities in existing piping.

Changes in the product and components

In air conditioners using R410A, in order to prevent any other refrigerant from being accidentally charged, the service port diameter size of the outdoor unit control
valve (3 way valve) has been changed. (1/2 UNF 20 threads per inch)

In order to increase the pressure resisting strength of the refrigerant piping, flare processing diameter and

opposing flare nuts sizes have been changed. (for copper pipes with nominal dimensions 1/2 and 5/8)

INSTALLATION/SERVICE TOOLS (ONLY FOR R410A PRODUCT)

CAUTION

Incidentally, the "refrigerant cylinder" comes with the refrigerant designation (R410A) and protector coating in the U.S's ARI specified rose color (ARI color

code: PMS 507).

Also, the "charge port and packing for refrigerant cylinder" requires 1/2 UNF 20 threads per inch corresponding to the charge hose's port size.

New tools for R410A

As the working pressure is high, it is impossible to measure the working pressure
using conventional gauges. In order to prevent any other refrigerant from being
charged, the port diameters have been changed.

In order to increase pressure resisting strength, hose materials and port sizes have
been changed (to 1/2 UNF 20 threads per inch). When purchasing a charge hose,
be sure to confirm the port size.

As working pressure is high and gasification speed is fast, it is difficult to read the
indicated value by means of charging cylinder, as air bubbles occur.

The size of opposing flare nuts have been increased. Incidentally, a common
wrench is used for nominal diameters 1/4 and 3/8.

By increasing the clamp bar's receiving hole size, strength of spring in the tool
has been improved.

Used when flare is made by using conventional flare tool.

Connected to conventional vacuum pump. It is necessary to  use an adapter to
prevent vacuum pump oil from flowing back into the  charge hose. The charge
hose connecting part has two ports -- one for  conventional refrigerant (7/16
UNF 20 threads per inch) and one for R410A.  If the vacuum pump oil (mineral)
mixes with R410A a sludge may occur and damage  the equipment.

Exclusive for HFC refrigerant.

New tools for R410A

Applicable to R22 model

Changes

Gauge manifold

Charge hose

Electronic balance for
refrigerant charging

Torque wrench (nominal
dia. 1/2, 5/8)

Flare tool (clutch type)

Gauge for projection
adjustment

Vacuum pump adapter

Gas leakage detector

SELECT THE BEST LOCATION

Indoor/Outdoor Unit Installation Diagram

Length of power supply cord

About 1.0 m

About 2.0 m

Piping direction

Right

Right Rear

Right Bottom

Left Rear

Left

(Front side)

This illustration is for explanation purposes only.
The indoor unit will actually face a different way.

more

10 cm

or more

10 cm

or mo

100

or more

Vinyl tape

Insulation of piping connections

Carry out insulation after
checking for gas leaks
and secure with
vinyl tape.

Saddle

Connecting cable -
heavier cord

Additional drain hose

Liquid piping

Gas piping

Bend the pipe as closely on
the wall as possible, but be
careful that it doesn't break.

5 cm

or more

10cm

more

Attention not to bend up
drain hose

No.

Accessories part

Qty. No.

Accessories part

Qty.

Installation plate

Installation plate
fixing screw

Remote control

Operation and
installation
instructions

Drain elbow

Air purifying filter (optional)

Installation carton board

Unit support

SELECT THE BEST LOCATION

(Refer to "Select the best location" section)

HOW TO FIX INSTALLATION

PLATE

The mounting wall is strong and solid enough to prevent it
from the vibration.

1.FOR THE RIGHT REAR PIPING

Pull out the Indoor piping

Install the Indoor Unit

Secure the Indoor Unit

Pull out the Indoor piping

Install the Indoor Unit

Install the connecting cable and pipe

Secure the Indoor Unit

3.FOR THE LEFT AND LEFT BOTTOM

Collaborate the piping

Secure the Indoor Unit

INDOOR UNIT INSTALLATION

2. FOR THE RIGHT AND RIGHT
BOTTOM PIPING

Install the Indoor Unit

Secure the Indoor Unit

1. Tape the extra power supply cord in a bundle and keep it behind
the chassis.
Ensure that the power supply cord is not clamped in between the unit's
hook (2 positions) and installation plate.

2. Take away the two installation support from the indoor unit.

3. Press the lower left and right side of the unit against the installation
plate until hooks engages with their slots (sound click).

Gas side
piping

Liquid side
piping

70 cm

Cable

Connecting
cable

Gas side
piping

Liquid side
piping

Drain hose

Rear view for left piping installation

To take out the unit, pull the
marking at the bottom unit, and pull it
slightly towards you to disengage the
hooks from the unit.

marking

1. Hook the indoor unit onto the upper

portion of installation plate (Engage the
indoor unit with the upper edge of the
installation plate). ensure the hooks are
properly seated on the installation plate
by moving in left and right.

2. Used two installation support that

supply in the accessory bag to support
the indoor unit in a angle about 25",
than connected the piping and power
supply cord.

3. Length of connecting cable.

Connecting cable

Drain hose

Adjust the piping slightly downwards.

Collaborate the piping

50mm
min

100mm min

pipe hold(L)

pipe hold(R)

Screw

The edge of installation carton board should be at more
than 200mm at right and left of the wall.

The distance from installation carton board edge to
ceiling should more than 100mm;

1. Conglutinate the installation carton board on the wall

in a horizontal position where you should installation
the indoor unit; you could estimate the installation
board if in the horizontal bases on the level gauge
that on the carton board;

2. Drill four holes to accommodate the dowels to mount

the installation plate, the four holes have in the
installation carton board;

3. Drill the piping hole at either right or left with 60mm

hole-core drill, and the holes hold be slightly slanted
to the outdoor side, the piping hold has in the
installation carton board;

4. Take away the carton board and mount the

installation plate on the wall with four screws or more.

Install the Indoor Unit

INSTALLATION OF AIR PURIFYING FILTERS

1. Open the grille.

2. Remove the air filters.

3. Put air purifying filter into place as shown in illustration at right.

SELECT THE BEST LOCATION

(Refer to "Select the best location" section)

INSTALL THE OUTDOOR UNIT

CONNECTING THE PIPING

Align center of piping to valves and then tighten with torque wrench to the specified
torque as stated in the table.

Connecting The Piping To Indoor Unit

Connecting the Piping To Outdoor Unit

Connect the piping

Align the center of piping and
sufficiently tighten the flare nut with
fingers.
Further tighten the flare nut with
torque wrench in specified torque as
stated in the table.

After selecting the best
location, start
installation according
to Indoor/Outdoor Unit
Installation Diagram.

1. Fix the unit on

concrete or rigid frame
firmly and horizontally
by bolt nut ( 8 mm).

2. When installing at roof,

please consider strong
wind and earthquake.
Please fasten the
installation stand firmly
with bolt or nails.

Spanner
or wrench

Torque
wrench

1. Please cut using pipe cutter and then remove the burrs.

2. Remove the burrs by using reamer. If burrs is not removed, gas leakage may be

caused. Turn the piping end down to avoid the metal powder entering the pipe.

3. Please make flare after inserting the flare nut onto the copper pipes.

4. If you used the piping kit, you could connect the piping directness and no need

do the procedure 1 to 3.

CUTTING AND FLARING THE PIPING

Model

Piping size

Gas

Liquid

2.1-3.6 kW

5.0 kW

1/2" (60 N m)

1/4"(20 N m)

1/4"(18 N m)

3/8" (45 N m)

EVACUATION OF THE

REFRIGERATION TUBES

AND THE INDOOR UNIT

After connection the unions of the indoor and outdoor units,

purge the air from the tubes and indoor unit as follows:

1. Connect the charging hoses with a push pin to the low and

high sides of the charging set and the service port of the
suction and liquid valves. Be sure to connect the end of the
charging hose with the push pin to the service port.

2. Connect the center hose of the charging set to a vacuum pump.

3. Turn on the power switch of the vacuum pump and make sure

that the needle in the gauge moves from 0MPa (0cm Hg) to -
0.1 MPa (-76cm Hg). Let the pump run for fifteen minutes.

4. Close the valves of both the low and high sides of the charging

set and turn off the vacuum pump. Note that the needle in the
gauge should not move after approximattely five minutes.

5. Disconnect the charging hose from the vacuum pump.

6. Tighten the service port caps from both valves.

7. Remove the valve caps from both valves, and open them using

a hexagonal Allen wrench.

8. Remount valve caps onto both of the valves.

9. Check for gas leaks from the four unions and from the valve

caps. Test with electronic leak detector or with a sponge
immersed in soapy water for bubbles.

NOTE

For additional charge of various tubing lengths,
refer to outdoor unit nameplate.

1. Charging set

2. Vacuum pump

3. OUTDOOR UNIT

4. Service valve

5. Cap

6. Suction valve

7. Service valve*

8. Cap

9. Liquid valve

10. INDOOR UNIT

11. Suction flare connection

12. Liquid flare connection

*In some models only

When properly flared, the internal
surface of the flare will evenly shine
and be of even thickness. since the
flare part comes into contact with the
connections, carefully check the flare
finish.

1. To cut

2. To remove burrs

3. To flare

Improper flaring

Bar

Clamp handle

Handle

Yoke

Core

Red arrow mark

Bar

0-0.05 mm

Copper
pipe

Inclined

Surface
damaged

cracked

Uneven
thickness

Pipe

Reamer

Point down

CONNECT THE CABLE TO THE
INDOOR AND OUTDOOR UNIT

If you used the piping kit, you can
connected the cable with the
connecter that in the cable.

To connect the indoor unit to the outdoor unit use the following electrical cables, protected for
outdoor use:

1. Indoor unit terminal
2. Ground wire
3. Indoor twin wire cable
4. Indoor coil
5. Resistor

6. Twin wire cable
7. Multiple wire cable
8. Cable clamp
9. Outdoor twin wire
terminal

Cooling and heating model:
Multiple wire cable

5 wires x 1.0 mm 2.1-3.6kW

5 wires x 1.5 mm 5.0kW

2 wires x 0.5 mm - for low voltage

Cooling only models:
Multiple wire cable

4 wires x 1.0 mm 2.1-3.6kW

4 wires x 1.5 mm 5.0kW

1. Prepare the multiple wire(7)cable

ends for connection.

2. Open the grille, take away the

terminals cover screw and open
the terminals cover, take away the
cable clamp screw and turn over
the cable clamp.

3. Connect the cable ends to the

terminals of the indoor and outdoor
units.

4. Shape a loop and connect the

yellow/green ground wire (2) to
ground terminal screw of the indoor
unit.

PIPE INSULATION

1. Please carry out insulation at pipe connection portion as mentioned in Indoor/

Outdoor Unit Installation Diagram. Please wrap the insulated piping end to prevent
water from going inside the piping.

2. If drain hose or connecting piping is in the room (where dew may form). please

increase the insulation by using POLY-E FOAM with thickness 6 mm or above.

Please follow the steps below to take out front grille if necessary such as when
servicing.

1. Set the vertical airflow direction louver to the horizontal position.

2. Slide down the three caps on the front grille as shown in the illustration at

right, and then remove the three mounting screws.

3. Pull the lower section of the front grille towards you to remove the front grille.

HOW TO TAKE OUT FRONT GRILLE

When reinstalling the front grille , first
set the vertical airflow direction louver
to the horizontal position and then
carry out above steps 2-3 in the
reverse order.

Cap

Screw

(Move the vertical
vane to horizontal)

Vertical airflow
deflection louver

DISPOSAL OF OUTDOOR UNIT DRAIN WATER

If a drain elbow is used, the unit should be placed on a stand which is taller than
3 cm.

CHECK THE DRAINAGE

Drain tray-
styr of oam

Open front panel and remove air filters.
(Drainage checking can be carried out without removing the front
grille.)
Pour a glass of water into the drain tray-styrofoam.
Ensure that water flows out from drain hose of the indoor unit.

EVALUATION OF THE PERFORMANCE

Operate the unit at cooling operation mode for fifteen minutes or
more.
Measure the temperature of the intake and discharge air.
Ensure the difference between the intake temperature and the

discharge is more than 8 C.

CHECK ITEMS

Is there any gas leakage at flare nut connections?

Has the heat insulation been carried out at flare nut
connection?

Is the connecting cable being fixed to terminal
board firmly?

Is the connecting cable being clamped firmly?

Is the drainage ok?
(Refer to "Check the drainage" section)

Is the earth wire connection properly done?

Is the indoor unit properly hooked to the installation
plate?

Is the power supply voltage complied with rated
value?

Is there any abnormal sound?

Is the cooling operation normal?