Mitsubishi electric PUH-P125YHAR3 User Manual [ru]

Air-Conditioners PU(H)-P•HA

INSTALLATION MANUAL

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

INSTALLATIONSHANDBUCH

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

MANUEL D’INSTALLATION

Avant d’installer le climatiseur, 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 airconditioner 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 de aire acondicionado.

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 il condizionatore d’aria.

EΓΧEIPIΔIO OΔHΓIΩN EΓKATAΣTAΣHΣ

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

MANUAL DE INSTALAÇÃO

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

INSTALLATIONSMANUAL

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

INSTALLATIONSMANUAL

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

MONTAJ ELKİTABI

Emniyetli ve doğru kullanım için, klima cihazını monte etmeden önce bu kılavuzu ve iç ünite montaj kılavuzunu tamamıyla okuyun.

РУКОВОДСТВО ПО УСТАНОВКЕ

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

FOR INSTALLER

FÜR INSTALLATEURE

POUR L’INSTALLATEUR

VOOR DE INSTALLATEUR

PARA EL INSTALADOR

PER L’INSTALLATORE

ΓΙΑ ΑΥΤΟΝ ΠΟΥ ΚΑΝΕΙ ΤΗΝ ΕΓΚΑΤΑΣΤΑΣΗ

PARA O INSTALADOR

TIL INSTALLATØREN

FÖR INSTALLATÖREN

MONTÖR İÇİN

ДЛЯ УСТАНОВИТЕЛЯ

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Contents

1. Safety precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

2. Installation location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

3. Installing the outdoor unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

4. Installing the refrigerant piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

5. Drainage piping work . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Caution:

• Do not vent R410A into the Atmosphere:

• R410A is a Fluorinated Greenhouse gas, covered by the Kyoto Protocol, with a Global Warming Potential (GWP)=2090.

6. Electrical work . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

7. Test run . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

8. Special Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

9. System control (Fig. 9-1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

1. Safety precautions

►

Before installing the unit, make sure you read all the “Safety precautions”.

► This equipment does not comply with the relevant technical standard

for the limitation of ﬂ icker and this may cause adverse effects on other electrical appliances. Please provide an exclusive circuit for the air condotioner and ensure, the max. impedance in this manual. Do not connect other appliances to this circuit.

► Please report to or take consent by the supply authority before connec-

tion to the system.

Warning: Describes precautions that must be observed to prevent danger of injury or death to the user.

Caution: Describes precautions that must be observed to prevent damage to the unit.

Warning:

• The unit must not be installed by the user. Ask a dealer or an authorized

technician to install the unit. If the unit is installed incorrectly, water leakage, electric shock, or ﬁ re may result.

• For installation work, follow the instructions in the Installation Manual and

use tools and pipe components speciﬁ cally made for use with R410A re- frigerant. The R410A refrigerant in the HFC system is pressurized 1.6 times the pressure of usual refrigerants. If pipe components not designed for R410A refrigerant are used and the unit is not installed correctly, the pipes may burst and cause damage or injuries. In addition, water leakage, electric shock, or ﬁ re may result.

• The unit must be installed according to the instructions in order to mini-

mize the risk of damage from earthquakes, typhoons, or strong winds. An incorrectly installed unit may fall down and cause damage or injuries.

• The unit must be securely installed on a structure that can sustain its

weight. If the unit is mounted on an unstable structure, it may fall down and cause damage or injuries.

• If the air conditioner is installed in a small room, measures must be taken

to prevent the refrigerant concentration in the room from exceeding the safety limit in the event of refrigerant leakage. Consult a dealer regarding the appropriate measures to prevent the allowable concentration from being exceeded. Should the refrigerant leak and cause the concentration limit to be exceeded, hazards due to lack of oxygen in the room may result.

• Ventilate the room if refrigerant leaks during operation. If refrigerant comes

into contact with a ﬂ ame, poisonous gases will be released.

• All electric work must be performed by a qualiﬁ ed technician according to

local regulations and the instructions given in this manual. The units must be powered by dedicated power lines and the correct voltage and circuit breakers must be used. Power lines with insufﬁ cient capacity or incorrect electrical work may result in electric shock or ﬁ re.

After installation work has been completed, explain the “Safety Precautions,” use, and maintenance of the unit to the customer according to the information in the Operation Manual and perform the test run to ensure normal operation. Both the Installation Manual and Operation Manual must be given to the user for keeping. These manuals must be passed on to subsequent users.

: Indicates a part which must be grounded.

Warning:

Carefully read the labels afﬁ xed to the main unit.

• Use C1220 copper phosphorus, for copper and copper alloy seamless pipes, to connect the refrigerant pipes. If the pipes are not connected correctly, the unit will not be properly grounded and electric shock may result.

• Use only speciﬁ ed cables for wiring. The connections must be made se- curely without tension on the terminals. If the cables are connected or installed incorrectly, overheating or ﬁ re may result.

• The terminal block cover panel of the outdoor unit must be ﬁ rmly attached. If the cover panel is mounted incorrectly and dust and moisture enter the unit, electric shock or ﬁ re may result.

• When installing or moving the air conditioner, use only the speciﬁ ed refrig- erant (R410A) to charge the refrigerant lines. Do not mix it with any other refrigerant and do not allow air to remain in the lines. Air enclosed in the lines can cause pressure peaks resulting in a rupture and other hazards.

• Use only accessories authorized by Mitsubishi Electric and ask a dealer or an authorized technician to install them. If accessories are incorrectly installed, water leakage, electric shock, or ﬁ re may result.

•

Do not alter the unit. Consult a dealer for repairs. If alterations or repairs are not performed correctly, water leakage, electric shock, or ﬁ re may re- sult.

• The user should never attempt to repair the unit or transfer it to another location. If the unit is installed incorrectly, water leakage, electric shock, or ﬁ re may result. If the air conditioner must be repaired or moved, ask a dealer or an authorized technician.

• After installation has been completed, check for refrigerant leaks. If refrigerant leaks into the room and comes into contact with the ﬂ ame of a heater or portable cooking range, poisonous gases will be released.

1.1. Before installation

Caution:

• Do not use the unit in an unusual environment. If the air conditioner is installed in areas exposed to steam, volatile oil (including machine oil), or sulfuric gas, areas exposed to high salt content such as the seaside, or areas where the unit will be covered by snow, the performance can be signiﬁ cantly reduced and the internal parts can be damaged.

• Do not install the unit where combustible gases may leak, be produced, ﬂ ow, or accumulate. If combustible gas accumulates around the unit, ﬁ re or explosion may result.

• The outdoor unit produces condensation during the heating operation. Make sure to provide drainage around the outdoor unit if such condensation is likely to cause damage.

1.2. Before installation (relocation)

Caution:

• Be extremely careful when transporting or installing the units. 2 or more persons are needed to handle the unit, as it weighs 20 kg or more. Do not grasp the packaging bands. Wear protective gloves to remove the unit from the packaging and to move it, as you can injure your hands on the ﬁ ns or the edge of other parts.

•

Be sure to safely dispose of the packaging materials. Packaging materials, such as nails and other metal or wooden parts may cause stabs or other injuries.

• When installing the unit in a hospital or communications office, be prepared for noise and electronic interference. Inverters, home appliances, high-frequency medical equipment, and radio communications equipment can cause the air conditioner to malfunction or breakdown. The air conditioner may also affect medical equipment, disturbing medical care, and communications equipment, harming the screen display quality.

• The base and attachments of the outdoor unit must be periodically checked for looseness, cracks or other damage. If such defects are left uncorrected, the unit may fall down and cause damage or injuries.

• Do not clean the air conditioner unit with water. Electric shock may result.

• Tighten all ﬂ are nuts to speciﬁ cation using a torque wrench. If tightened too much, the ﬂ are nut can break after an extended period and refrigerant can leak out.

1. Safety precautions

1.3. Before electric work

Caution:

• Be sure to install circuit breakers. If not installed, electric shock may result.

• For the power lines, use standard cables of sufﬁ cient capacity. Otherwise, a short circuit, overheating, or ﬁ re may result.

• When installing the power lines, do not apply tension to the cables. If the connections are loosened, the cables can snap or break and overheating or ﬁ re may result.

1.4. Before starting the test run

Caution:

• Turn on the main power switch more than 12 hours before starting operation. Starting operation just after turning on the power switch can severely damage the internal parts. Keep the main power switch turned on during the operation season.

• Before starting operation, check that all panels, guards and other protective parts are correctly installed. Rotating, hot, or high voltage parts can cause injuries.

• Do not touch any switch with wet hands. Electric shock may result.

1.5. Using R410A refrigerant air conditioners

Caution:

• Use new refrigerant pipes.

Note the following if reusing existing pipes that carried R22 refrigerant.

- Be sure to clean the pipes and make sure that the insides of the pipes are clean.

- Replace the existing ﬂ are nuts and ﬂ are the ﬂ ared sections again.

- Do not use thin pipes. (Refer to page 5)

• Use C1220 copper phosphorus, for copper and copper alloy seamless pipes, to connect the refrigerant pipes. Make sure the insides of the pipes are clean and do not contain any harmful contaminants such as sulfuric compounds, oxidants, debris, or dust. Use pipes with the speciﬁ ed thick- ness. (Refer to page 5)

• Store the pipes to be used during installation indoors and keep both ends of the pipes sealed until just before brazing. (Leave elbow joints, etc. in their packaging.) If dust, debris, or moisture enters the refrigerant lines, oil deterioration or compressor breakdown may result.

• Use ester oil, ether oil, alkylbenzene oil (small amount) as the refrigeration oil applied to the ﬂ ared sections. If mineral oil is mixed in the refrigeration oil, oil deterioration may result.

• Be sure to ground the unit. Do not connect the ground wire to gas or water pipes, lighting rods, or telephone grounding lines. If the unit is not properly grounded, electric shock may result.

• Use circuit breakers (ground fault interrupter, isolating switch (+B fuse), and molded case circuit breaker) with the speciﬁ ed capacity. If the circuit breaker capacity is larger than the speciﬁ ed capacity, breakdown or ﬁ re may result.

• Do not touch the refrigerant pipes with bare hands during operation. The refrigerant pipes are hot or cold depending on the condition of the ﬂ owing refrigerant. If you touch the pipes, burns or frostbite may result.

• After stopping operation, be sure to wait at least ﬁ ve minutes before turn- ing off the main power switch. Otherwise, water leakage or breakdown may result.

• Do not use refrigerant other than R410A refrigerant. If another refrigerant is used, the chlorine will cause the oil to deteriorate.

• Use a vacuum pump with a reverse ﬂ ow check valve.

If the vacuum pump oil ﬂ ows backward into the refrigerant lines, refriger-

ant oil deterioration may result.

• Use the following tools speciﬁ cally designed for use with R410A refriger- ant. The following tools are necessary to use R410A refrigerant. Contact your nearest dealer for any questions.

Tools (for R410A)

Gauge manifold Flare tool

Charge hose Size adjustment gauge

Gas leak detector Vacuum pump adapter

Torque wrench Electronic refrigerant charging scale

• Be sure to use the correct tools. If dust, debris, or moisture enters the refrigerant lines, refrigeration oil deterioration may result.

• Do not use a charging cylinder. If a charging cylinder is used, the composition of the refrigerant will change and the efﬁ ciency will be lowered.

2. Installation location

Fig. 2-1

P71-P140

330+30

943 (1350)

175

600

Fig. 2-2

2.1. Refrigerant pipe (Fig. 2-1)

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

P71,100,125,140 Max. 50 m Max. 30 m Max. 15

• Height difference limitations are binding regardless of which unit, indoor or outdoor, is positioned higher.

D Indoor unit E Outdoor unit

A Pipe length

(one way)

B Height difference C

Number of bends

(one way)

2.2. Choosing the outdoor unit installation location

• Avoid locations exposed to direct sunlight or other sources of heat.

• Select a location from which noise emitted by the unit will not inconvenience

950

(mm)

370

neighbors.

• Select a location permitting easy wiring and pipe access to the power source and indoor unit.

• Avoid locations where combustible gases may leak, be produced, ﬂ ow, or accu- mulate.

• Note that water may drain from the unit during operation.

• Select a level location that can bear the weight and vibration of the unit.

• Avoid locations where the unit can be covered by snow. In areas where heavy snow fall is anticipated, special precautions such as raising the installation location or installing a hood on the air intake must be taken to prevent the snow from blocking the air intake or blowing directly against it. This can reduce the airﬂ ow and a malfunction may result.

• Avoid locations exposed to oil, steam, or sulfuric gas.

• Use the transportation handles of the outdoor unit to transport the unit. If the unit is carried from the bottom, hands or ﬁ ngers may be pinched.

2.3. Outline dimensions (Outdoor unit) (Fig. 2-2)

The ﬁ gure in parenthesis is for P125, P140 models.

2. Installation location

Fig. 2-3

Fig. 2-4

Fig. 2-5

2.4. Ventilation and service space

2.4.1. Windy location installation

When installing the outdoor unit on a rooftop or other location unprotected from the wind, situate the air outlet of the unit so that it is not directly exposed to strong winds. Strong wind entering the air outlet may impede the normal airflow and a malfunction may result. The following shows three examples of precautions against strong winds. 1 Face the air outlet towards the nearest available wall about 50 cm away from the

wall. (Fig. 2-3)

2 Install an optional air guide if the unit is installed in a location where strong winds

from a typhoon, etc. may directly enter the air outlet. (Fig. 2-4)

A Air outlet guide

3 Position the unit so that the air outlet blows perpendicularly to the seasonal wind

direction, if possible. (Fig. 2-5)

B Wind direction

2.4.2. When installing a single outdoor unit (Refer to the last page)

Minimum dimensions are as follows, except for Max., meaning Maximum dimensions, indicated. The ﬁ gures in parentheses are for P125, P140 models. Refer to the ﬁ gures for each case.

1 Obstacles at rear only (Fig. 2-6) 2 Obstacles at rear and above only (Fig. 2-7) 3 Obstacles at rear and sides only (Fig. 2-8) 4 Obstacles at front only (Fig. 2-9)

* When using an optional air outlet guide, the clearance for P125, P140 models is 500 mm

or more.

5 Obstacles at front and rear only (Fig. 2-10)

* When using an optional air outlet guide, the clearance for P125, P140 models is 500 mm

or more.

6 Obstacles at rear, sides, and above only (Fig. 2-11)

• Do not install the optional air outlet guides for upward airﬂ ow.

2.4.3. When installing multiple outdoor units (Refer to the last page)

Leave 10 mm for P71-140 space or more between the units.

1 Obstacles at rear only (Fig. 2-12) 2 Obstacles at rear and above only (Fig. 2-13)

• No more than three units must be installed side by side. In addition, leave space as shown.

• Do not install the optional air outlet guides for upward airﬂ ow.

3 Obstacles at front only (Fig. 2-14)

* When using an optional air outlet guide, the clearance for P125. P140 models is 1000 mm

or more.

4 Obstacles at front and rear only (Fig. 2-15)

* When using an optional air outlet guide, the clearance for P125, P140 models is 1000 mm

or more.

5 Single parallel unit arrangement (Fig. 2-16)

* When using an optional air outlet guide installed for upward airﬂ ow, the clearance is 500

(1000) mm or more.

6 Multiple parallel unit arrangement (Fig. 2-17)

* When using an optional air outlet guide installed for upward airﬂ ow, the clearance is 1000

(1500) mm or more.

7 Stacked unit arrangement (Fig. 2-18)

• The units can be stacked up to two units high.

• No more than 2 stacked units must be installed side by side. In addition, leave space as shown.

3. Installing the outdoor unit

Max. 30 for P71-140

A M10 (3/8") bolt B Base C As long as possible. D Vent E Set deep in the ground.

P71-140

Min. 360

600 600

(mm)

• Be sure to install the unit in a sturdy, level surface to prevent rattling noises dur-

ing peration. (Fig. 3-1)

Foundation bolt M10 (3/8") Thickness of concrete 120 mm Length of bolt 70 mm Weight-bearing capacity 320 kg

• Make sure that the length of the foundation bolt is within 30 mm of the bottom

surface of the base.

• Secure the base of the unit ﬁ rmly with four-M10 foundation bolts in sturdy loca-

tions.

Installing the outdoor unit

• Do not block the vent. If the vent is blocked, operation will be hindered and

breakdown may result.

• In addition to the unit base, use the installation holes on the back of the unit to

attach wires, etc., if necessary to install the unit. Use self-tapping screws (ø5 × 15 mm or less) and install on site.

Warning:

• The unit must be securely installed on a structure that can sustain its

weight. If the unit is mounted on an unstable structure, it may fall down and cause damage or injuries.

• The unit must be installed according to the instructions in order to mini-

mize the risk of damage from earthquakes, typhoons, or strong winds. An incorrectly installed unit may fall down and cause damage or injuries.

330

370

Min. 10

175 175

950

Fig. 3-1

4. Installing the refrigerant piping

A B

90op0.5o

A Flare cutting dimensions B Flare nut tightening torque

øA

45op2o

R0.4~R0.8

4.1. Precautions for devices that use R410A refrigerant

• Refer to page 3 for precautions not included below on using air condition-

ers with R410A refrigerant.

• Use ester oil, ether oil, alkylbenzene oil (small amount) as the refrigeration

oil applied to the ﬂ ared sections.

• Use C1220 copper phosphorus, for copper and copper alloy seamless

pipes, to connect the refrigerant pipes. Use refrigerant pipes with the thicknesses speciﬁ ed in the table to the below. Make sure the insides of the pipes are clean and do not contain any harmful contaminants such as sulfuric compounds, oxidants, debris, or dust.

Warning: When installing or moving the air conditioner, use only the speciﬁ ed refriger- ant (R410A) to charge the refrigerant lines. Do not mix it with any other refrigerant and do not allow air to remain in the lines. Air enclosed in the lines can cause pressure peaks resulting in a rupture and other hazards.

P71-140

Liquid pipe ø9.52 thickness 0.8 mm

Gas pipe ø15.88 thickness 1.0 mm

• Do not use pipes thinner than those speciﬁ ed above.

4.2. Connecting pipes (Fig. 4-1)

• When commercially available copper pipes are used, wrap liquid and gas pipes

with commercially available insulation materials (heat-resistant to 100 °C or more, thickness of 12 mm or more).

• Be sure to separate thermal insulation for gas and liquid refrigerant pipes.

• The indoor parts of the drain pipe should be wrapped with polyethylene foam

insulation materials (speciﬁ c gravity of 0.03, thickness of 9 mm or more).

• Apply thin layer of refrigerant oil to pipe and joint seating surface before tighten-

ing ﬂ are nut. A

• Use 2 wrenches to tighten piping connections. B

• Use leak detector or soapy water to check for gas leaks after connections are

completed.

• Apply refrigerating machine oil over the entire ﬂ are seat surface. C

• Use the ﬂ are nuts for the following pipe size. D

A (Fig. 4-1)

Copper pipe O.D.

ø15.88 19.3 - 19.7 ø19.05 23.6 - 24.0

B (Fig. 4-1)

Copper pipe O.D.

ø15.88 29 68 - 82 ø15.88 36 100 - 120 ø19.05 36 100 - 120

Fig. 4-1

(mm) ø6.35 8.7 - 9.1 ø9.52 12.8 - 13.2 ø12.7 16.2 - 16.6

(mm) ø6.35 17 14 - 18 ø6.35 22 34 - 42 ø9.52 22 34 - 42 ø12.7 26 49 - 61 ø12.7 29 68 - 82

Flare dimensions

øA dimensions (mm)

Flare nut O.D.

(mm)

Tightening torque

(N·m)

A Die B Copper pipe

Fig. 4-2

Gas side Pipe size (mm) ø15.88

Liquid side Pipe size (mm) ø9.52

• When bending the pipes, be careful not to break them. Bend radius of 100 mm to 150 mm are sufﬁ cient.

• Make sure the pipes do not contact the compressor. Abnormal noise or vibration may result.

1 Pipes must be connected starting from the indoor unit. Flare nuts must be tightened with a torque wrench. 2 Flare the liquid pipes and gas pipes and apply a thin layer of refrigeration oil (Ap-

plied on site).

• When usual pipe sealing is used, refer to Table 1 for ﬂ aring of R410A refrigerant pipes.

The size adjustment gauge can be used to conﬁ rm A measurements.

Table 1 (Fig. 4-2)

Copper pipe O.D.

(mm)

ø6.35 (1/4") 0 - 0.5 1.0 - 1.5 ø9.52 (3/8") 0 - 0.5 1.0 - 1.5

ø12.7 (1/2") 0 - 0.5 1.0 - 1.5 ø15.88 (5/8") 0 - 0.5 1.0 - 1.5 ø19.05 (3/4") 0 - 0.5 1.0 - 1.5

Flare tool for R410A Flare tool for R22·R407C

P71-140

A (mm)

Clutch type

4. Installing the refrigerant piping

P71-140

Fig. 4-3

F Sealed, same way for gas side G Pipe cover H Do not use a wrench here.

Refrigerant leakage may result.

I Use 2 wrenches here.

E F

A Stop valve <Liquid side> B Stop valve <Gas side> C Service port D Open/Close section E Local pipe

Fig. 4-4

(1) (2)

Fig. 4-5 Fig. 4-6

A Valve B Unit side C Handle D Cap E Local pipe side F Pipe cover G Service port H Wrench hole

I Double spanner section

(Do not apply a spanner other than to this section. Doing

so would cause coolant leaks.) J Seal section (Seal the end of the heat insulation material at the pipe

connection section with whatever seal material you have

on hand so that water does not inﬁ ltrate the heat insula-

tion material.)

A Front piping cover B Piping cover C Stop valve D Service panel E Bend radius : 100 mm-150 mm

4.3. Refrigerant piping (Fig. 4-3)

For P71-140

Remove the service panel D (3 screws) and the front piping cover A (2 screws) and rear piping cover B (2 screws). 1 Perform refrigerant piping connections for the indoor/outdoor unit when the out-

door unit’s stop valve is completely closed.

2 Vacuum-purge air from the indoor unit and the connection piping. 3 After connecting the refrigerant pipes, check the connected pipes and the indoor

unit for gas leaks. (Refer to 4.4 Refrigerant pipe airtight testing method)

4 A high-performance vacuum pump is used at the stop valve service port to main-

tain a vacuum for an adequate time (at least 1 hour after reaching –101 kPa (5 Torr)) in order to vacuum dry the inside of the pipes. Always check the degree of vacuum at the gauge manifold. If there is any moisture left in the pipe, the degree of vacuum is sometimes not reached with short-time vacuum application.

After vacuum drying, completely open the stop valves (both liquid and gas) for

the outdoor unit. This completely links the indoor and outdoor refrigerant circuits.

• If the vacuum drying is inadequate, air and water vapor remain in the refrigerant circuits and can cause abnormal rise of high pressure, abnormal drop of low pressure, deterioration of the refrigerant machine oil due to moisture, etc.

• If the stop valves are left closed and the unit is operated, the compressor and control valves will be damaged.

• Use a leak detector or soapy water to check for gas leaks at the pipe connection sections of the outdoor unit.

• Do not use the refrigerant from the unit to purge air from the refrigerant lines.

• After the valve work is completed, tighten the valve caps to the correct torque: 20 to 25 N·m (200 to 250 kgf·cm).

Failure to replace and tighten the caps may result in refrigerant leakage. In

addition, do not damage the insides of the valve caps as they act as a seal to prevent refrigerant leakage.

5 Use sealant to seal the ends of the thermal insulation around the pipe connec-

tion sections to prevent water from entering the thermal insulation.

4.4. Refrigerant pipe airtight testing method

(1)

Connect the testing tools.

• Make sure the stop valves A B are closed and do not open them.

• Add pressure to the refrigerant lines through the service port C of the liquid stop valve D.

(2)

Do not add pressure to the speciﬁ ed pressure all at once; add pressure little by

little.

1 Pressurize to 0.5 MPa (5 kgf/cm²G), wait 5 minutes, and make sure the pres-

sure does not decrease.

2 Pressurize to 1.5 MPa (15 kgf/cm²G), wait 5 minutes, and make sure the

pressure does not decrease.

3 Pressurize to 4.15 MPa (41.5 kgf/cm²G) and measure the surrounding tem-

perature and refrigerant pressure.

(3)

If the speciﬁ ed pressure holds for about one day and does not decrease, the

pipes have passed the test and there are no leaks.

• If the surrounding temperature changes by 1 °C, the pressure will change by about 0.03 MPa (0.3 kgf/cm²G). Make the necessary corrections.

(4)

If the pressure decreases in steps (2) or (3), there is a gas leak. Look for the

source of the gas leak.

4.5. Stop valve opening method

The stop valve opening method varies according to the outdoor unit model. Use the appropriate method to open the stop valves. (1)

Gas side of P71-140 (Fig. 4-5)

1 Remove the cap, pull the handle toward you and rotate 1/4 turn in a counter-

clockwise direction to open.

2 Make sure that the stop valve is open comletely, push in the handle and rotate

the cap back to its original position.

(2)

Liquid side of P71-140 (Fig. 4-6)

1 Remove the cap and turn the valve rod counterclockwise as far as it will go with

the use of a 4 mm hexagonal wrench. Stop turning when it hits the stopper. (ø9.52: Approximately 10 revolutions) 2 Make sure that the stop valve is open completely and rotate the cap back to its

original position. Refrigerant pipes are protectively wrapped for P71-140

• The pipes can be protectively wrapped up to a diameter of ø90 before or after

connecting the pipes. Cut out the knockout in the pipe cover following the groove

and wrap the pipes. Pipe inlet gap for P71-140

• Use putty or sealant to seal the pipe inlet around the pipes so that no gaps re-

main. (If the gaps are not closed, noise may be emitted or water and dust will

enter the unit and breakdown may result.)

* The ﬁ gure to the left is an example only. The stop valve shape, service port position, etc., may vary according to the model. * Turn section A only. (Do not further tighten sections A and B

together.)

C Charge hose D Service port

Precautions when using the charge valve (Fig.4-7)

Do not tighten the service port too much when installing it, otherwise, the valve core could be deformed and become loose, causing a gas leak. After positioning section B in the desired direction, turn section A only and tighten it. Do not further tighten sections A and B together after tightening section A.

Fig. 4-7

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