Mitsubishi Electric SUHZ-SW-VA Installation Manual

Air to Water Heat Pump

SUHZ-SW•VA series

TIL INSTALLATØREN

FÖR INSTALLATÖREN

PARA O INSTALADOR

ΓΙΑ ΑΥΤΟΝ ΠΟΥ ΚΑΝΕΙ ΤΗΝ ΕΓΚΑΤΑΣΤΑΣΗ

PER L’INSTALLATORE

PARA EL INSTALADOR

VOOR DE INSTALLATEUR

POUR L’INSTALLATEUR

FÜR INSTALLATEURE

FOR INSTALLER

INSTALLATION MANUAL

For safe and correct use, read this manual and the indoor unit installation manual thoroughly before installing
the outdoor unit.

INSTALLATIONSHANDBUCH

Aus Sicherheitsgründen und zur richtigen Verwendung vor der Installation der Außenanlage die vorliegende
Bedienungsanleitung und die Installationsanleitung der Innenanlage gründlich durchlesen.

MANUEL D’INSTALLATION

Avant d’installer l’appareil extérieur, lire attentivement ce manuel, ainsi que le manuel d’installation de l’appareil
intérieur pour une utilisation sûre et correcte.

INSTALLATIEHANDLEIDING

Lees deze handleiding en de installatiehandleiding van het binnenapparaat zorgvuldig door voordat u met het
installeren van de buitenunit begint.

MANUAL DE INSTALACIÓN

Para un uso correcto y seguro, lea detalladamente este manual y el manual de instalación de la unidad interior
antes de instalar la unidad exterior.

MANUALE DI INSTALLAZIONE

Per un uso sicuro e corretto, leggere attentamente il presente manuale ed il manuale d’installazione dell’unità
interna prima di installare l’unità esterna.

EΓΧEIPIΔIO OΔHΓIΩN EΓKATAΣTAΣHΣ

Για σωστή και ασφαλή χρήση, διαβάστε προσεκτικά αυτό το εγχειρίδιο καθώς και το εγχειρίδιο εγκατάστασης
της εσωτερικής μονάδας, προτού εγκαταστήσετε την εξωτερική μονάδα.

MANUAL DE INSTALAÇÃO

Para uma utilização segura e correcta, leia atentamente este manual e o manual de instalação da unidade
interior antes de instalar a unidade exterior.

INSTALLATIONSMANUAL

Læs af sikkerhedshensyn denne manual samt manualen til installation af indendørsenheden grundigt, før du
installerer udendørsenheden.

INSTALLATIONSMANUAL

Läs bruksanvisningen och inomhusenhetens installationshandbok noga innan utomhusenheten installeras så
att den används på ett säkert och korrekt sätt.

English

Deutsch

Français

Nederlands

Español

Italiano

Eλληνικά

Português

Dansk

Svenska

INSTALLERINGSHÅNDBOK

For å sikre trygg og riktig bruk skal denne håndboken samt installasjonshåndboken for innendørsenheten
leses grundig igjennom før enheten installeres.

ASENNUSOPAS

Turvallisen ja asianmukaisen käytön varmistamiseksi lue tämä opas sekä sisäyksikön asennusopas huolellis­esti ennen yksikön asentamista.

FOR MONTØREN

ASENTAJALLE

Norsk

Suomi

MONTAJ ELKİTABI

Güvenli ve doğru kullanım için, dış üniteyi monte etmeden önce bu kılavuzu ve iç unite montaj kılavuzunu dik­katlice okuyun.

Türkçe

РУКОВОДСТВО ПО УСТАНОВКЕ

Для обеспечения безопасной и надлежащей эксплуатации внимательно прочтите данное руководство
и руководство по установке внутреннего прибора перед установкой наружного блока.

Русский

MONTÖR İÇİN

ДЛЯ УСТАНОВИТЕЛЯ

2

Contents

1. The following should always be observed for safety . . . . . . . . . . . . . . . . . . . . . . 2

2. Selecting the installation location

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

3. Installation diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

4. Drain piping for outdoor unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

5. Refrigerant piping work . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

1. The following should always be observed for safety

• After reading this manual, be sure to keep it together with the instruction
manual in a handy place on the customer’s site.

: Indicates a part which must be grounded.

Warning:

Carefully read the labels afxed to the main unit.

Warning:

• Do not install it by yourself (customer).

Incomplete installation could cause injury due to re, electric shock, the

unit falling or leakage of water. Consult the dealer from whom you pur­chased the unit or special installer.

• This appliance is intended to be used by expert or trained users in shops,

in light industry and on farms, or for commercial use by lay persons.

• Install the unit securely in a place which can bear the weight of the unit.

When installed in an insufcient strong place, the unit could fall causing

injured.

• Use the specied wires to connect the indoor and outdoor units securely
and attach the wires rmly to the terminal board connecting sections so

the stress of the wires is not applied to the sections.

Incomplete connecting and xing could cause re.

• Do not use intermediate connection of the power cord or the extension

cord and do not connect many devices to one AC outlet.

It could cause a re or an electric shock due to defective contact, defective
insulation, exceeding the permissible current, etc.

•

Check that the refrigerant gas does not leak after installation has completed.

• Perform the installation securely referring to the installation manual.

Incomplete installation could cause a personal injury due to re, electric

shock, the unit falling or leakage of water.

• Use only specied cables for wiring. The wiring connections must be made

securely with no tension applied on the terminal connections. Also, never
splice the cables for wiring (unless otherwise indicated in this document).

Failure to observe these instructions may result in overheating or a re.

• Perform electrical work according to the installation manual and be sure to

use an exclusive circuit.

If the capacity of the power circuit is insufficient or there is incomplete

electrical work, it could result in a re or an electric shock.

• Attach the electrical part cover to the indoor unit and the service panel to
the outdoor unit securely.
If the electrical part cover in the indoor unit and/or the service panel in the

outdoor unit are not attached securely, it could result in a re or an electric

shock due to dust, water, etc.

• Be sure to use the part provided or specified parts for the installation
work.
The use of defective parts could cause an injury or leakage of water due to

a re, an electric shock, the unit falling, etc.

• Ventilate the room if refrigerant leaks during operation.

If the refrigerant comes in contact with a ame, poisonous gases will be

released.

•

When pumping down the refrigerant, stop the compressor before discon­necting the refrigerant pipes. The compressor may burst if air etc. get into it.

• When installing or relocating, or servicing the outdoor unit, use only the

specied refrigerant (R410A) to charge the refrigerant lines. Do not mix it

with any other refrigerant and do not allow air to remain in the lines.

If air is mixed with the refrigerant, then it can be the cause of abnormal

high pressure in the refrigerant line, and may result in an explosion and

other hazards.

The use of any refrigerant other than that specified for the system will

cause mechanical failure or system malfunction or unit breakdown. In the
worst case, this could lead to a serious impediment to securing product
safety.

Caution:

• Perform grounding.
Do not connect the ground wire to a gas pipe, water pipe arrester or tele­phone ground wire. Defective grounding could cause an electric shock.

• Do not install the unit in a place where an inammable gas leaks.

If gas leaks and accumulates in the area surrounding the unit, it could

cause an explosion.

• Install a ground leakage breaker depending on the installation place (where
it is humid).

• Please provide an exclusive circuit for the outdoor unit and do not connect

other electrical appliances to it.

• Be sure to read “The following should always be observed for safety” be

-

fore installing the outdoor unit.

• Be sure to observe the cautions specied here as they include important

items related to safety.

•

The indications and meanings are as follows.

Warning:

Could lead to death, serious injury, etc.

Caution:
Could lead to serious injury in particular environments when operated incor­rectly.

If a ground leakage breaker is not installed, it could cause an electric
shock.

• Perform the drainage/piping work securely according to the installation
manual.
If there is a defect in the drainage/piping work, water could drop from the
unit and household goods could be wet and damaged.

• Fasten a are nut with a torque wrench as specied in this manual.
When fastened too tight, a are nut may be broken after a long period and

cause a leakage of refrigerant.

2.1. Outdoor unit

• Where it is not exposed to strong wind.

• Where airow is good and dustless.

• Where it is not exposed to rain and direct sunshine.

• Where neighbours are not annoyed by operation sound or hot air.

• Where rigid wall or support is available to prevent the increase of operation
sound or vibration.

• Where there is no risk of combustible gas leakage.

• When installing the unit at a high level, be sure to x the unit legs.

• Where it is at least 3 m away from the antenna of TV set or radio. (Otherwise,
images would be disturbed or noise would be generated.)

• Please install it in an area not affected by snowfall or blowing snow. In areas

with heavy snow, please install a canopy, a pedestal and/or some bafe boards.

• Install the unit horizontally.

Caution:
Avoid the following places for installation where outdoor unit trouble is liable
to occur.

• Where there is too much machine oil.

• Salty environment as seaside areas.

• Hot-spring areas.

• Where sulde gas exists.

• Other special atmospheric areas.
The outdoor unit produces condensate during the heating operation. Se­lect the installation place to ensure to prevent the outdoor unit and/or the
grounds from being wet by drain water or damaged by frozen drain water.

2. Selecting the installation location

6. Electrical work . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

7. Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

8. Pumping down . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

9. Specications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

3

3. Installation diagram

Fig. 3-1

3.1. Outdoor unit (Fig. 3-1)

Ventilation and service space

■ SUHZ-SW45

A

100 mm or more

B 350 mm or more
C 500 mm or more

When the piping is to be attached to a wall containing metals (tin plated) or metal
netting, use a chemically treated wooden piece 20 mm or thicker between the wall
and the piping or wrap 7 to 8 turns of insulation vinyl tape around the piping.

Note:
When operating the outdoor unit in low outside temperature, be sure to fol­low the instructions described below.

• Never install the outdoor unit in a place where its air inlet/outlet side may be ex

-

posed directly to wind.

• To prevent exposure to wind, install the outdoor unit with its air inlet side facing
the wall.

• To prevent exposure to wind, it is recommended to install a bafe board on the

air outlet side of the outdoor unit.

Units should be installed by licensed contractor accordingly to local code re­quirement.

Fig. 4-1

4. Drain piping for outdoor unit (Fig. 4-1)

4.1. Accessories

Check the following parts before installation.
<Outdoor unit>

Drain socket 1

• Provide drain piping before indoor and outdoor piping connection. (It will be hard
to install drain socket if indoor and outdoor piping connection is conducted
prior to drain piping as outdoor unit becomes immovable.)

• Connect the drain hose

(obtainable at a store, inside diameter: 15 mm) as

shown in the gure for drainage.

• Make sure to provide drain piping with a downhill grade for easy drain ow.

Note:
Do not use the drain socket in the cold region. Drain may freeze and it
makes the fan stop.

• Do not use the drain socket for the SUHZ-SW45VAH.

SUHZ-SW45VA

(mm)

■ SUHZ-SW45











Drainage hole
(ø42)

Air inlet

Air inlet

Air outlet

2-10 mm × 21 mm slot

50

840 81

40

330

360

175 500

417.5

Drain socket

Drain hose

1

4

/

2

10

3 4

90°

2

1

0

/

0

/

/

0

3

0

1

2

1

A

5. Refrigerant piping work

Fig. 5-2

Fig. 5-1

Fig. 5-3

5.1. Refrigerant pipe (Fig. 5-1)

► Check that the difference between the heights of the indoor and outdoor

units, the length of refrigerant pipe, and the number of bends in the pipe
are within the limits shown below.

Models

(A) Pipe length

(one way)

(B) Height
difference

(C) Number of

bends (one way)

SUHZ-SW45 Max. 15 m Max. 15 m Max. of 10

• Height difference limitations are binding regardless of which unit, indoor or out

-

door, is positioned higher.

• Refrigerant adjustment ... If pipe length exceeds 7 m, additional refrigerant
(R410A) charge is required.
(The outdoor unit is charged with refrigerant for pipe length up to 7 m.)

Pipe length

Up to 7 m No additional charge is required.

Exceeding 7 m

Additional charge is required.

(Refer to the table below.)
Refrigerant
to be added

SUHZ-SW45 25 g × (refrigerant piping length (m) -7)

Piping preparation

• Refrigerant pipes of 3, 5, 7, 10 and 15 m are available as optional items.

(1) Table below shows the specications of pipes commercially available.

Model Pipe

Outer diameter

Min. wall

thickness

Insulation
thickness

Insulation

material

mm inch

SUHZ-

SW45

For liquid 6.35 1/4 0.8 mm 8 mm

Heat resisting

foam plastic

0.045 specic

gravity

For gas 12.7 1/2 0.8 mm 8 mm

(2) Ensure that the 2 refrigerant pipes are well insulated to prevent condensation.
(3) Refrigerant pipe bending radius must be 100 mm or more.

Caution:

Using careful insulation of specied thickness. Excessive thickness prevents

storage behind the indoor unit and smaller thickness causes dew drippage.

5.2. Flaring work

• Main cause of gas leakage is defect in aring work.
Carry out correct aring work in the following procedure.

5.2.1. Pipe cutting (Fig. 5-3)

• Using a pipe cutter cut the copper tube correctly.

5.2.2. Burrs removal (Fig. 5-4)

• Completely remove all burrs from the cut cross section of pipe/tube.

• Put the end of the copper tube/pipe to downward direction as you remove burrs
in order to avoid burrs drop in the tubing.

5.2.3. Putting nut on (Fig. 5-5)

• Remove are nuts attached to indoor and outdoor unit, then put them on pipe/

tube having completed burr removal.

(not possible to put them on after aring work)

5.2.4. Flaring work (Fig. 5-6)

• Carry out aring work using aring tool as shown at the right.

Pipe diameter

(mm)

Dimension

A (mm)

B

+0

(mm)

-0.4

When the tool for R410A is used

Clutch type

6.35 0 - 0.5 9.1

9.52

0 - 0.5 13.2

12.7

0 - 0.5 16.6

15.88 0 - 0.5 19.7

Firmly hold copper tube in a die in the dimension shown in the table at above.





(C)

(B)

(A)





ø6.35

ø12.7

Fig. 5-4

Fig. 5-5

Fig. 5-6

A Indoor unit
B Outdoor unit

A Indoor unit
B Outdoor unit

a Copper tubes
b Good
c No good
d Tilted
e Uneven
f Burred

a Burr
b Copper tube/pipe
c Spare reamer
d Pipe cutter

a Flare nut
b Copper tube

a Flaring tool
b Die
c Copper tube
d Flare nut
e Yoke

5

5. Refrigerant piping work

5.2.5. Check (Fig. 5-7)

• Compare the ared work with a gure in right side hand.

•

If are is noted to be defective, cut off the ared section and do aring work again.

a Smooth all around f Scratch on ared plane
b Inside is shining without any scratches g Cracked
c Even length all around h Uneven
d Too much i Bad examples
e Tilted

• Apply a thin coat of refrigeration oil on the seat surface of pipe. (Fig. 5-8)

•

For connection rst align the center, then tighten the rst 3 to 4 turns of are nut.

• Use tightening torque table below as a guideline for indoor unit side union joint

section, and tighten using two wrenches. Excessive tightening damages the are

section.

Copper pipe O.D.

(mm)

Flare nut O.D.

(mm)

Tightening torque

(N·m)
ø6.35 17 14 - 18
ø9.52

22 34 - 42

ø12.7 26

49 - 61

ø15.88 29 68 - 82

Warning:
When installing the unit, securely connect the refrigerant pipes before start­ing the compressor.

Warning:

Be careful of ying are nut! (Internally pressurized)
Remove the are nut as follows:

1. Loosen the nut until you hear a hissing noise.

2. Do not remove the nut until the gas has been completely released (i.e.,

hissing noise stops).

3.

Check that the gas has been completely released, and then remove the nut.

Fig. 5-7

Fig. 5-8

1

0

/

2 3 4 5 6

7

B

5.5. Purging procedures leak test

PURGING PROCEDURES

Connect the refrigerant pipes (both the liquid and gas pipes) between the indoor
and the outdoor units.

Remove the service port cap of the stop valve on the side of the outdoor unit gas
pipe. (The stop valve will not work in its initial state fresh out of the factory (totally
closed with cap on).)

Connect the gauge manifold valve and the vacuum pump to the service port of
the stop valve on the gas pipe side of the outdoor unit.

Run the vacuum pump. (Vacuumize for more than 15 minutes.)

Check the vacuum with the gauge manifold valve, then close the gauge manifold
valve, and stop the vacuum pump.

Leave it as is for one or two minutes. Make sure the pointer of the gauge mani-

fold valve remains in the same position. Conrm that the pressure gauge shows

-0.101 MPa (-760 mmHg).

Remove the gauge manifold valve quickly from the service port of the stop valve.

After refrigerant pipes are connected and evacuated, fully open all stop valves
on gas and liquid pipe sides.
Operating without fully opening lowers the performance and causes trouble.

Pipe length :

7 m maximum

No gas charge is needed.

Pipe length exceeding 7 m

Charge the prescribed

amount of gas.

Tighten the cap to the service port to obtain the initial status.

Retighten the cap.

Leak test

*Close

*Open

Hexagonal wrench

Stop valve

Stop valve

Service port

Charge hose
(for R410A)

Window

Adapter for
preventing the

back ow

Charge hose
(for R410A)

(or the vacuum
pump with the
function to prevent

the back ow)

Handle High

Gauge manifold
valve (for R410A)

Pressure gauge
(for R410A)

Compound pressure
gauge (for R410A)

*4 to 5 turns

Stop
valve

Handle
Low

Vacuum
pump

-0.101 MPa
(-760 mmHg)

6

6. Electrical work

6.1. Outdoor unit (Fig. 6-1, Fig. 6-2, Fig. 6-3)

1 Remove the service panel.
2 Wire the cables referring to the Fig. 6-1, Fig. 6-2 and Fig. 6-3.

•

Perform wiring as shown in the diagram to the lower left. (Procure the cable locally)
(Fig. 6-2)
Make sure to use cables of the correct polarity only.

A Connecting cable
B Indoor terminal block
C Outdoor terminal block
D Always install an earth wire longer than other cables.
E Power supply cord

Caution:

• Use care not to make miswiring.

• Firmly tighten the terminal screws to prevent then from loosening.

• After tightening, pull the wires lightly to conrm that they do not move.

• Connect cable from the indoor unit correctly on the terminal-block.

•

Use the same terminal block and polarity as is used with the indoor unit.

• For aftercare maintenance, give extra length to connecting cable.

• Both end of connecting cable (extension wire) are peeled off. When too
long, or connected by cutting off the middle, peel off power supply cable to

the size given in the gure.

•

Be careful not to contact connecting cable with piping.

Caution:

• Use care not to make miswiring.

• Firmly tighten the terminal screws to prevent them from loosening.

• After tightening, pull the wires lightly to conrm that they do not move.

Warning:

• Be sure to attach the service panel of the outdoor unit securely. If it is not

attached correctly, it could result in a re or an electric shock due to dust,

water, etc.

• Tighten terminal screws securely.

• Wiring should be done so that the power lines are not subject to tension.

Otherwise, heat may be generated or re may occur.









Fig. 6-1

Fig. 6-2

Fig. 6-3

For Power supply

Indoor terminal block

Earth wire (green/yellow)

Indoor/outdoor unit connecting
wire 3-core 1.5 mm² or more

Outdoor terminal block

Power supply cord : 2.5

mm² or more

Service panel

Remove xing

screw to open the
service panel.

Be sure to x the

indoor/outdoor unit
connecting wire us­ing this cord clamp.

SUHZ-SW45









S3

S2

S1

21

N~L~S3S2S1

SUHZ-SW45

L~

N~

E

C

A Indoor unit
B Outdoor unit
C Wired main switch (Earth leakage breaker)
D Earth

7

S1

S2

S3

S1

S2

S3

6. Electrical work

7. Maintenance

7.1. Gas charge (Fig. 7-1)

1. Connect gas cylinder to the service port of stop valve (3-way).

2.

Execute air purge of the pipe (or hose) coming from refrigerant gas cylinder.

3. Replenish specied amount of refrigerant, while running the outdoor unit

for cooling.

Note:
In case of adding refrigerant, comply with the quantity specied for the refrig­erating cycle.

Caution:

• Do not discharge the refrigerant into the atmosphere.
Take care not to discharge refrigerant into the atmosphere during installa­tion, reinstallation, or repairs to the refrigerant circuit.

• For additional charging, charge the refrigerant from liquid phase of the gas

cylinder.

If the refrigerant is charged from the gas phase, composition change may

occur in the refrigerant inside the cylinder and the outdoor unit. In this
case, ability of the refrigerating cycle decreases or normal operation can

be impossible. However, charging the liquid refrigerant all at once may

cause the compressor to be locked. Thus, charge the refrigerant slowly.

To maintain the high pressure of the gas cylinder, warm the gas cylinder with warm

water (under 40°C) during cold season. But never use naked re or steam.

6.2. Field electrical wiring

Outdoor unit model SUHZ-SW45
Outdoor unit power supply ~/N (single), 50 Hz, 230 V
Outdoor unit input capacity Main switch (Breaker) *1 20 A

Wiring Wire

No. × size

(mm

2

)

Outdoor unit power supply 2 × Min. 2.5
Outdoor unit power supply earth 1 × Min. 2.5
Indoor unit-Outdoor unit 3 × 1.5 (Polar)
Indoor unit-Outdoor unit earth 1 × Min. 1.5

Circuit

rating

Outdoor unit L-N *2 AC 230 V
Indoor unit-Outdoor unit S1-S2 *2 AC 230 V
Indoor unit-Outdoor unit S2-S3 *2 DC 12 V ~ DC 24 V

*1. A breaker with at least 3 mm contact separation in each poles shall be provided. Use earth leakage breaker (NV).
Make sure that the current leakage breaker is one compatible with higher harmonics.
Always use a current leakage breaker that is compatible with higher harmonics as this unit is equipped with an inverter.
The use of an inadequate breaker can cause the incorrect operation of inverter.

*2. The gures are NOT always against the ground.

S3 terminal has DC 24 V against S2 terminal. However between S3 and S1, these terminals are NOT electrically insulated by the transformer or other device.

Notes: 1. Wiring size must comply with the applicable local and national code.

2. Power supply cords and Indoor/Outdoor unit connecting cords shall not be lighter than polychloroprene sheathed exible cord. (Design 60245 IEC 57)

3. Install an earth longer than other cables.

Outdoor Unit

3 poles isolator

230 V

Single phase

Isolator

Indoor Unit

Warning:
There is high voltage potential on the S3 terminal caused by electrical circuit design that has no electrical insulation between power line and communication
signal line. Therefore, please turn off the main power supply when servicing. And do not touch the S1, S2, S3 terminals when the power is energized. If isolator
should be used between indoor unit and outdoor unit, please use 3-poles type.

A Indoor unit H Refrigerant gas cylinder for R410A with siphon
B Union I Refrigerant (liquid)
C Liquid pipe J Electronic scale for refrigerant charging
D Gas pipe K Charge hose (for R410A)
E Stop valve L Gauge manifold valve (for R410A)
F Outdoor unit M Service port
G Refrigerant gas cylinder

operating valve
























Fig. 7-1

Never splice the power cable or the indoor-outdoor connection cable, otherwise it may result in a smoke, a re or communication failure.

8

When relocating or disposing of the outdoor unit, pump down the system following
the procedure below so that no refrigerant is released into the atmosphere.

1 Turn OFF all the supply circuit (including Indoor unit, Heater, Outdoor unit etc.)
2 Connect the gauge manifold valve to the service port of the stop valve on the

gas pipe side of the outdoor unit.

3 Fully close the stop valve on the liquid pipe side of the outdoor unit.
4 Change the settings on the indoor unit.

• Set DIP switch SW1-3 to OFF, SW2-1 to OFF and SW2-4 to ON on the indoor
control board.

• Disconnect the signal inputs IN1 (room thermostat 1 input), IN4 (Demand
control input) and IN5 (Outdoor thermostat input).

CNP1(WHT)

TBI.1

CNV1

(WHT)

TBO.2

TBO.1

1 3

1

5

13

1

5

SW3

1

8

1 6

1

5

CN01
(BLK)

1

3

CN3C
(BLU)

CNBH
(WHT)

1

7

CNBC

(GRY)

13

CNBHT

(BLK)

13

CNIH

(ORN)

1

2

CN22
(BLU)

CN2F
(YLW)

1

3

CN20
(RED)

CN21
(YLW)

1

3

CNW12

(RED)

CNW5
(WHT)

CNW3
(WHT)

1

2

1

4

1

2

1

2

TBI.2

LED1

LED2

CNPWM
(WHT)

1

3

SW2

1

8

SW1

1

8

SW4

CN108

CNRF
(WHT)

LED4 LED5

LED3

1

5

CN105
(RED)

IN1 IN4 IN5

5 Turn ON all the supply circuit.
6 From the main menu on the main controller of the indoor unit, select "Heating/

cooling mode" → "Cooling ow temp.".

7 From the main menu, select “Service” → “Operation settings” → “Freeze stat

function”, and then set the minimum outdoor ambient temperature to *(asterisk).

You will be prompted to enter a password. THE FACTORY DEFAULT PASS

-

WORD is “0000”.



8. Pumping down

Outdoor model SUHZ-SW45
Power supply Single phase 230 V, 50 Hz
Dimensions W × H × D mm 840 × 880 × 330
Weight kg 54

Sound level *1

Cooling

dB (A)

52

Heating 52

*1 Measured under rated operating frequency.

9. Specications

8 Perform the refrigerant collecting operation.

• Push “ON/OFF” button on the main controller.

• From the option menu, set “Cooling ON”

• Set the target ow temperature to 5 °C. If the system is controlled by a room
temperature thermostat, set the target room temperature to 10 °C.

Refrigerant collecting operation starts after 60 seconds.

• For details or for other information about the main controller settings, refer to
the installation manual or operation manual for indoor unit.

9

Fully close the stop valve on the gas pipe side of the outdoor unit when the pres­sure gauge shows 0.05 to 0 MPa [Gauge] (approx. 0.5 to 0 kgf/cm2) and quickly
stop the outdoor unit.

• Push the “ON/OFF” button on the remote controller to stop the outdoor unit.

* Note that when the extension piping is very long with a large refrigerant

amount, it may not be possible to perform a pump down operation. In this
case, use refrigerant recovery equipment to collect all of the refrigerant in the
system.

0 Set back the main controller setting changed at the procedure 8 above.
1 Push the “ON/OFF” button for about 3 seconds on the main controller of the in-

door unit to stop the unit.

2 Set back the main controller settings changed at any other procedure except 8.
3 Turn OFF all the supply circuit and set back the DIP switch settings on the in-

door circuit board as it were.

4 Remove the gauge manifold valve, and then disconnect the refrigerant pipes.

Warning:
When pumping down the refrigerant, stop the compressor before disconnect­ing the refrigerant pipes.

• If the refrigerant pipes are disconnected while the compressor is operat

­ing and the stop valve (ball valve) is open, the pressure in the refrigeration
cycle could become extremely high if air is drawn in, causing the pipes to
burst, personal injury, etc.

Caution:

Do NOT use this COOLING mode at any other cases except pumping down.

If it is used as normal operation, the heat pump may not provide enough per­formance.