McQuay SB250B Guida d'installazione

AIR COOLED, DUCTED

SPLIT TYPE AIR-CONDITIONERS

INSTALLATION MANUAL

Group: SPLIT TYPE

Part Number: A08019025528

Date: MAY 2001

IM-MHSB-0501-McQuay

i

OUTLINE AND DIMENSIONS

SB40B / 50B / 40BR / 50BR

SB60B / 75B / 100B / 60BR / 75BR / 100BR

ii

SB125B / 150B / 200B

NOTE:

FOR HORIZONTAL AIR DISCHARGE

SB125C / 150C

NOTE:

FOR HORIZONTAL AIR DISCHARGE

Model A B C

SB125B/150B 1370 1540 533

SB200B 1624 1794 660

Model A B C

SB125C 1370 1540 533

SB150C 1549 1719 622,5

iii

SB250B / SB300B / 350B / 400B / 450B / 500B

NOTE:

FOR HORIZONTAL AIR DISCHARGE

SB600B / SB750B

NOTE:

FOR HORIZONTAL AIR DISCHARGE

Model A B C D E F G H I J K L

SB250B/300B 1826 1636 973,6 1231 1259 1766 1866 560 603 542 444 245

SB350B 2082 1852 973,6 1480 1259 2022 2122 560 751 482 532 436,5

SB400B/450B/500B 2234 2004 1270,6 1451 1526 2174 2274 694 740 698 436,5 316,5

iv

MSB10A / 15A

MSB20A / 25A / 30A

Model A B C D E F G H I J K L M N

MSB10A 599 399 319 419 273 589 233 305 549 535 419 234 150 98

MSB15A 797 597 319 419 273 787 233 305 747 535 419 234 150 98

MSB20A 932 732 319 419 666 922 233 305 882 535 419 234 150 98

MSB25A 1089 889 319 419 666 1079 233 305 1039 535 419 234 150 98

MSB30A 1267 1067 319 419 732 1257 233 305 1217 535 419 234 150 98

v

HSB30A / 40A / 50A / 60A / 30AR / 40AR / 50AR / 60AR

Model A B C D E F G H I J K L M

HSB30A/AR 980 780 970 930 475 87 756 87 384 591 313 152 162

HSB40A/AR 1100 900 1090 1050 475 147 756 147 384 591 313 152 162

HSB50A/AR 1350 1150 1340 1300 475 272 756 272 384 591 313 152 162

HSB60A/AR 1550 1315 1540 1500 475 372 756 372 384 591 313 152 162

SL10B / 15B / 20B / 25B / 30B / 10BR / 15BR / 20BR / 25BR / 30BR

Model A B C D E F G H J K L M N P Q R

SL10B/BR 740 494 270 266 233 474 47 55 65 166 92 348 318 129 482 68,5

SL15B/BR 740 494 270 266 233 474 47 55 65 166 92 348 318 129 482 78,5

SL20B/BR 840 646 330 297 309 626 41 85 65 177 106 408 378 124 592 78,5

SL25B/BR 840 646 330 297 309 626 41 85 75 177 106 408 378 124 592 78,5

SL30B/BR 840 646 330 297 309 626 41 85 75 177 106 408 378 124 592 78,5

vi

SL30C / 40C / 50C / 60C / 30CR / 40CR / 50CR

MSS 75B / 100B / 125B / 100BR

NOTE:

FOR VERTICAL AIR DISCHARGE

vii

MSS100C

MSS60C / 75C / 60CR / 75CR

MSS 150C / 125BR

viii

This product is subjected to Waste of Electrical and Electronic Equipment Regulations (WEE

E

Regulations). The waste product shall be separately collected by specific collection and treatment centre

.

P

lease refer to local authorithy for these centres. This is only applicable to European Union countries

.

Ce produit est soumis

à

la r

à

é

r

glementation concernant les

d

é

chets

d

es

é

quipements

é

lectriques e

t

é

lectroniques (r

é

r

é

ê

é

s

é

par

é

r

m

ent par un centre de collect

e

é

î

tre ces centres. Ceci

îî

é

enne

.

Questo prodotto

è

soggetto alle disposizioni RAEE (Rifiuti di apparecchiature elettriche ed elettroniche)

.

à

locali. Questa disposizione

à

è

valida solamente i paes

i

d

el

l

’

U.

E

.

é

ctrico y Electr

ó

n

ico en materia d

e

ñ

á

í

fico

í

de colecc

i

ó

solamente aplicable a los p

a

í

ses de la

U

n

i

ó

n

Europea

.

G

er

ä

tes

ää

getrennt vom Hausm

ü

ll bei Ihrer

ö

r

tlichen

M

ü

lldeponie bzw. Ihrem

ö

r

tliche

n

ä

ndiges Abfall-Amt. Dieser

ää

Hinweis gilt nur f

ü

ff

rL

ä

nder der Europ

ää

ä

ischen Union

.

п

р

авилам

и

п

о

у

тилизаци

и

отхо

д

о

в

(WEEE Re

g

ulations).

и

.

,

.

Э

т

и

п

р

авил

а

Ев

р

опейског

о

.

Scharfe Kanten und Wärmetauscherflächen stellen eine Gefahrenquelle dar. Jeglicher

Kontakt mit diesen Stellen ist zu vermeiden.

! Vorsicht

! Cautela

Per preservarsi da eventuali ferite, evitare di toccare gli spigoli afilati e la superficie dei

serpentini.

! Cuidado

Los Bordes afilados y la superficie del serpentín pueden producir lesiones. Evite tocarlos.

! Осторожно

Острые края и поверхности змеевиков являются потенциальными

местами нанесения травм. Остерегайтесь контакта с этими местами.

Sharp edges and coil surfaces are potential locations which may cause injury hazards. Avoid

from being in contact with these places.

! Caution

! Avertissement

Les bords coupants et les surfaces du refroidisseur tuulaire présentent un risque

de blessure. Mieux vaut éviter le contact avec ces endroits.

NOTICE

1-1

English

This manual provides the procedures of installation to ensure a safe and good standard of operation for the air

conditioner unit.

Special adjustment may be necessary to suit local requirements.

Before using your air conditioner, please read this instruction manual carefully and keep it for future reference.

INSTALLATION MANUAL

STATIC BLOWER SPLIT TYPE AIR CONDITIONER

MODEL

COOLING ONLY

SB

SB40B / MDB040B

SB50B / MDB050B

SB60B / MDB060B

SB75B / MDB075B

SB100B / MDB100B

SB125B / MDB125B

SB150B / MDB150B

SB200B / MDB200B

SB250B / MDB250B

SB300B / MDB300B

SB350B / MDB350B

SB400B / MDB400B

SB450B / MDB450B

SB500B / MDB500B

SB600B / MDB600B

SB750B / MDB750B

SB125C / MDB125C

SB150C / MDB150C

MSB

MSB10A / MMSB010A

MSB15A / MMSB015A

MSB20A / MMSB020A

MSB25A / MMSB025A

MSB30A / MMSB030A

HSB

HSB30A / MHSB30A

HSB40A / MHSB40A

HSB50A / MHSB50A

HSB60A / MHSB60A

OUTDOOR

SL

SL10B / MLC010B

SL15B / MLC015B

SL20B / MLC020B

SL25B / MLC025B

SL30C / MLC030C

SL40C / MLC040C

SL50C / MLC050C

SL60C / MLC060C

MSS

MSS60C / MMC060C

MSS75B / MMC075B

MSS75C / MMC075C

MSS100B / MMC100B

MSS100C / MMC100C

MSS125C / MMC125C

MSS150C / MMC150C

HEAT PUMP

SB

SB40BR / MDB040BR

SB50BR / MDB050BR

SB60BR / MDB060BR

SB75BR / MDB075BR

SB100BR / MDB100BR

SB125BR / MDB125BR

SB150BR / MDB150BR

SB200BR / MDB200BR

SB250BR / MDB250BR

SB300BR / MDB300BR

SB350BR / MDB350BR

SB400BR / MDB400BR

SB500BR / MDB500BR

SB125CR / MDB125CR

MSB

MSB10AR / MMSB010AR

MSB15AR / MMSB015AR

MSB20AR / MMSB020AR

MSB25AR / MMSB025AR

MSB30AR / MMSB030AR

HSB

HSB30AR / MHSB30AR

HSB40AR / MHSB40AR

HSB50AR / MHSB50AR

HSB60AR / MHSB60AR

SL

SL10BR / MLC010BR

SL15BR / MLC015BR

SL20BR / MLC020BR

SL25BR / MLC025BR

SL30CR / MLC030CR

SL40CR / MLC040CR

SL50CR / MLC050CR

SL60CR / MLC060CR

MSS

MSS60CR / MMC060CR

MSS75BR / MMC075BR

MSS75CR / MMC075CR

MSS100BR / MMC100BR

MSS125BR / MMC125BR

IM-MHSB-0501 (3)-McQuay

Part No.: A08019025528

1-2

SAFETY PRECAUTIONS

Before installing the air conditioner unit, please read the following safety precautions carefully.

! Warning

• Installation and maintenance should be performed by qualified persons who are familiar with local code and

regulation, and experienced with this type of appliance.

• All field wiring must be installed in accordance with the national wiring regulation.

• Ensure that the rated voltage of the unit corresponds to that of the name plate before commencing wiring work

according to the wiring diagram.

• The unit must be GROUNDED to prevent possible hazard due to insulation failure.

• All electrical wiring must not touch the refrigerant piping, compressor and any moving parts of the fan motors.

• Confirm that the unit has been switched OFF before installing or servicing the unit.

IMPORTANT

DO NOT INSTALL OR USE THE AIR CONDITIONER UNIT IN A LAUNDRY ROOM.

CONTENTS

- Outline And Dimensions page i-viii

- Safety Precautions page 2

- Installation Of The Indoor Unit page 3

- Installation Of The Outdoor Unit page 3

- Refrigerant Piping page 4

- Electrical Connection page 6

- Vacuuming And Charging page 10

- Special Precautions When Charging Unit With Copeland Scroll Compressors page 11

- Standard Operating Conditions page 12

- Auto Random Re-start Function page 12

- Service and Maintenance page 13

- Troubleshooting page 13

- Phase Protector (Optional) page 14

! Caution

Please take note on the following important points when installing.

• Do not install the unit where leakage of flammable gas may occur.

If gas leaks and accumulates around the unit, it may cause fire ignition.

• Ensure that the drainage piping is connected properly.

If the drainage piping is not connected properly, it may cause water leakage which will dampen the

furniture.

• Do not overcharge the unit.

This unit is factory pre-charged. Overcharge will cause over-current or damage to the compressor.

• Ensure that the unit panel is closed after service or installation.

Unsecured panel will cause unit to operate noisily.

1-3

English

INSTALLATION OF THE INDOOR UNIT

Mounting

Ensure that the overhead supports are strong enough to hold

the unit’s weight. Position hanger rods and check for align-

ment with the unit. Check that hangers are secure and that

the base of fan-coil unit is level in the two horizontal direc-

tions, taking into account the gradient recommended for

drainage flow as shown.

Check the gradient recommended for drainage flow as

follow.

INSTALLATION OF THE OUTDOOR UNIT

Location For Installation

Install the outdoor unit in such way that air distributed by

the outdoor unit cannot be drawn in again (as in the case of

short circuit of discharge air). Allow sufficient space for

maintenance around the unit.

Ensure that there are no obstruction of air flow into or

out of the unit. Remove obstacles which block air intake

or discharge.

When two or more outdoor units are installed in a location,

they must be positioned such that one unit will not be taking

the discharge air from another.

This also applies when two or more units are installed one

above the other. The units must all face the same direction,

or opposite direction (back to back), such that air short circuit

does not occur.

The location must be well ventilated, so that the unit can draw and distribute plenty of air.

A place capable of bearing the weight of the outdoor unit and isolating noise and vibration.

A place protected from direct sunlight. Otherwise use an awning for protection, if necessary.

A place where smooth drainage of rain water and water formed by defrosting is acceptable.

A place where the unit will not be buried in snow.

A place where air outlet port is not exposed to strong wind.

A place where the air discharge and operating sound level will not annoy the neighbours.

The location must not be susceptible to dust or oil mist.

Provide clearance for servicing and optimal air flow as

shown in the diagram.

The indoor unit must be installed such that there is no short

circuit of cool discharge with air discharge.

Respect the installation clearance.

*for free return of air

If the condensing unit is operated in an atmosphere containing oils (including machine oils), salt (coastal area),

sulfide gas (near hot spring, oil refinery plant), such substances may lead to failure of the unit.

! Caution

SB 125 ~ 200B (Horizontal)

SB 250 ~ 750B (Vertical)

** For SB 400 ~ 750B

1-4

Installation Clearance

Outdoor unit must be installed such that there is no short circuit of the discharge air or obstruction to smooth air flow.

Minimum distance (mm) A B C

30/40/50 300 1000 300

60/75 300 1200 500

100/125/150 300 1000 1500

REFRIGERANT PIPING

Maximum Pipe Length And Maximum No. Of Bends

When the pipe length becomes too long, both the capacity and reliability will drop and as the no. of bends increases, system

piping resistance to the refrigerant flow increases, thus lowering the capacity. As a result the compressor may fail. Always

choose the shortest path and follow the recommendations as tabulated below:-

Model MSS60C/CR MSS75C/CR

SL30C/CR SL40C/CR SL50C/CR SL60C/CR 100B/BR/125B/BR

150C

Max. Length 35m 35m 35m 35m 35m

Max. Elevation 10m 10m 10m 20m 20m

Max. no. of Bends 10 10 10 10 10

Bending must be carefully made so as not to crush the pipe. Use a pipe bender to bend a pipe where possible.

Our guarantee on the performance of our air-conditioners is strictly revoked if the height, length and/or no. of bends

of the refrigerant piping system installed is beyond the limit above.

! Caution

Obstacle

Service Access

Return Air

Discharge Air

Return Air

Air Discharge Space

Remark: For cooling unit SB60~SB75 & SB100~SB150, recommended to add 6 kg & 10 kg external accumulator

respectively.

Special Precautions When Mounting TXV Bulb

• TXV bulb should be clamped to the suction line near the evaporator outlet, and if possible, on a horizontal run.

• Clean suction line completely before clamping the bulb in place.

• Clamp the bulb to a free draining suction line.

• Insulate the remote bulb from ambient.

Note: After installation is done, the TXV bulb must be fixed at suction line at 8 o’clock or 4 o’clock.

Figure – TXV bulb placement in relation to suction line size

TXV Bulb on small Suction Line TXV Bulb on large Suction Line

1-5

English

Remove Burr

Spanar

Torque Wrench

Indoor Piping

Flare Nut

Flared Tube

Flare Joint

Cutting Copper Tube

Piping Connection To The Units

• Align the center of the piping and tighten the flare nut

sufficiently with fingers.

• Finally, tighten the flare nut with the torque wrench

until the wrench clicks.

• When tightening the flare nut with the torque wrench,

ensure that the tightening direction follows the arrow

indicated on the wrench.

Pipe Size (mm/in) Torque (Nm)

6.35 (1/4") 18

9.53 (3/8") 42

12.7 (1/2") 55

15.88 (5/8") 65

19.05 (3/4") 78

Piping Works & Brazing Technique

• Do not use contaminated or damaged copper tubing. If any

pipings, evaporator or condenser had been exposed or had

been opened for 15 seconds or more, then vacuum and purge

with field supplied refrigerant. Generally, do not remove

plastic, rubber plugs and brass nuts from the valves, fittings,

tubings and coils until it is ready to connect suction or liquid

line into valves or fittings.

• If any brazing work is required, ensure that the nitrogen gas

is passed through coil and joints while the brazing work is

being done. This will eliminate soot formation on the inside

walls of the copper tubings.

• Cut the pipe stage by stage, advancing the blade of the pipe

cutter slowly. Extra force and deep cut will cause more

distortion on the pipe and thus extra burr. See figure.

• Remove burrs from cut edges of the pipes with remover as

shown in the figure. Hold the end of the pipe downwards to

prevent metal chips from entering the pipe.

Copper Tube

1/4t

1-6

L

N

E

COMP

L

N

COMP

R

S

T

N

ELECTRICAL CONNECTION

Cooling

Indoor Unit SB40B/SB50B/SB60B/SB75B/SB100B/HSB40A/HSB50A/HSB60A

Outdoor Unit SL40C/SL50C/SL60C or M/SS60C/M/SS75C/M/SS100C/SL40C/SL50C/SL60C

Voltage range** 380V-415V / 3Ph / 50Hz or 208V-230V/3Ph/60Hz

Power Supply Cable*

Number of Conductors

a) Indoor Unit –

b) Outdoor Unit 5

Interconnection cable*

4

Number of conductors

The electrical power

must be provided with

protection device

(circuit breaker or

fuse) with pole

separation system and

minimum contact gap

of 3mm.

!

Indoor Unit

Outdoor Unit

Interconnection Cable

SB40B/50B/60B/75B/100B, HSB40A/50A/60A

Power Supply

IMPORTANT: * The figures shown in the table are for information purpose only. They should be checked and selected

to comply with the local/national codes of regulations. This is also subject to the type of

installation and conductors used.

** The appropriate voltage range should be checked with label data on the unit. ETL listed is only applicable

to 60Hz power supply only.

Indoor Unit SB125B/150B/200B/250B/300B/400B/450B/500B/650B/750B/125C/150C

Outdoor Unit MSS75B/MSS100B/MSS125B/MSS150C/MSS75C/MSS100C/MSS125C

Voltage range** 380V-415V / 3Ph / 50Hz or 208V-230V/3Ph/60Hz or 460V/3Ph/60Hz

Power Supply Cable*

Number of Conductors

a) Indoor Unit 5

b) Outdoor Unit 5

Interconnection cable*

1

Number of conductors

The electrical power

must be provided with

protection device

(circuit breaker or fuse)

with pole separation

system and minimum

contact gap of 3mm.

!

Indoor Unit

Outdoor Unit

SB125B/150B/200B/250B/300B/400B/450B/500B/650B/750B/125C/150C

N

T

S

R

TB1

TB2

N

T

S

R

N

COMP

SW

TDR

TH

SW: Switch TH: Thermostat control

TDR: Timer

Power Supply

1-7

English

Indoor Unit SB40BR/SB50BR/SB60BR/SB75BR/HSB40AR/HSB50AR/HSB60AR/SB100BR

Outdoor Unit MSS40BR/MSS50BR/MSS60CR/MSS75CR/MSS40BR/MSS50BR/MSS60CR/SL40CR/

SL50CR/SL40CR/SL50CR/MSS100BR

Voltage range** 380V-415V / 3Ph / 50Hz or 208V-230V / 3Ph / 60Hz

Power Supply Cable*

Number of Conductors

a) Indoor Unit –

b) Outdoor Unit 5

Interconnection cable*

7

Number of conductors

The electrical power must be

provided with protection

device (circuit breaker or fuse)

with pole separation system

and minimum contact gap of

3mm.

!

Indoor Unit

Outdoor Unit

Interconnection

Cable

SB40BR/50BR/60BR/75BR/100BR

HSB40AR/50AR/60AR

4WV

A

OF

N

L

COMP

4WV

A

OF

N

L

COMP

N

T

S

R

Outdoor Coil Sensor

Heat Pump

4WV

A

OF

N

L

COMP

4WV

A

OF

N

L

COMP

N

T

S

R

T

S

R

Indoor Unit SB125CR

Outdoor Unit MSS125BR

Voltage range** 380V-415V / 3Ph / 50Hz or 208V-230V / 3Ph / 60Hz or 460V / 3 Ph / 60 Hz

Power Supply Cable*

Number of Conductors

a) Indoor Unit 3

b) Outdoor Unit 5

Interconnection cable*

7

Number of conductors

IMPORTANT: * The figures shown in the table are for information purpose only. They should be checked and selected

to comply with the local/national codes of regulations. This is also subject to the type of

installation and conductors used.

** The appropriate voltage range should be checked with label data on the unit. ETL listed is only applicable

to 60Hz power supply only.

The electrical power must be

provided with protection

device (circuit breaker or fuse)

with pole separation system

and minimum contact gap of

3mm.

!

Indoor Unit

Outdoor Unit

Interconnection

Cable

SB125CR

Outdoor Coil Sensor

Power supply

1-8

L

N

COMP

L

N

COMP

L

N

Indoor Unit HSB30A

Outdoor Unit SL30C

Voltage range** 220V-240V / 1Ph / 50Hz or 208V-230V / 3Ph / 60Hz or 460V / 3Ph / 60Hz

Power Supply Cable*

Number of Conductors

a) Indoor Unit –

b) Outdoor Unit 3

Interconnection cable*

4

Number of conductors

The electrical power must be provided with protection

device (circuit breaker or fuse) with pole separation

system and minimum contact gap of 3mm.

!

Indoor Unit

Terminal

Block

Outdoor Unit

Terminal

Block

Interconnection Cable

HSB30A/MSB30B

Cooling

Power Supply

IMPORTANT: * The figures shown in the table are for information purpose only. They should be checked and selected

to comply with the local/national codes of regulations. This is also subject to the type of

installation and conductors used.

** The appropriate voltage range should be checked with label data on the unit. ETL listed is only applicable

to 60Hz power supply only.

Indoor Unit MSB10A MSB15A MSB20A MSB25A MSB30A

Outdoor Unit SL10B SL15B SL20B SL25B SL30B

Voltage range** 220V-240V / 1Ph / 50Hz or 208V-230V / 1Ph / 60Hz

Power Supply Cable*

Number of Conductors

a) Indoor Unit 3 –

b) Outdoor Unit – 3

Interconnection cable*

34

Number of conductors

The electrical power must be provided with protection

device (circuit breaker or fuse) with pole separation

system and minimum contact gap of 3mm.

!

Indoor Unit

Outdoor Unit

Interconnection Cable

L

N

COMP

N

MSB10A/15A/20A/25A

Power Supply

1-9

English

4WV

A

OF

N

L

COMP

4WV

A

OF

N

L

COMP

N

L

Indoor Unit HSB30AR

Outdoor Unit SL30CR

Voltage range** 220V-240V / 1Ph / 50Hz or 208V-230V / 1Ph / 60Hz

Power Supply Cable*

Number of Conductors

a) Indoor Unit –

b) Outdoor Unit 3

Interconnection cable*

7

Number of conductors

Heat Pump

The electrical power must be

provided with protection

device (circuit breaker or

fuse) with pole separation

system and minimum contact

gap of 3mm.

!

Indoor Unit

Outdoor Unit

Interconnection

Cable

HSB30AR/MSB30AR

Outdoor Coil Sensor

Power Supply

Indoor Unit MSB10AR MSB15AR MSB20AR MSB25AR

Outdoor Unit SL10BR SL15BR SL20BR SL25BR

Voltage range** 220V-240V / 1Ph / 50Hz or 208V-230V / 1Ph / 60hz

Power Supply Cable*

Number of Conductors

a) Indoor Unit 3

b) Outdoor Unit –

Interconnection cable*

5

Number of conductors

MSB10AR/15AR/20AR/25AR

4WV

OF

N

L

COMP

4WV

OF

N

COMP

The electrical power must be

provided with protection

device (circuit breaker or

fuse) with pole separation

system and minimum contact

gap of 3mm.

!

Indoor Unit

Outdoor Unit

Interconnection

Cable

Outdoor Coil Sensor

Power Supply

1-10

Indoor Unit SB150BR/200BR/250BR/300BR/350BR/400BR/500BR

Outdoor Unit

Voltage range** 380V-415V / 1Ph / 50Hz

Power Supply Cable*

Number of Conductors

a) Indoor Unit 5

b) Outdoor Unit 5

Interconnection cable*

8

Number of conductors

SB150BR/200BR/250BR/300BR/350BR/400BR/500BR

Indoor Unit

4WV2

4WV1

OF2

OF1

N2

N1

COMP2

COMP1

4WV

OF

N

L

COMP

HP4 HP4

HP3 HP3

HP2 HP2

HP1 HP1

DS4 DS4

DS3 DS3

DS2 DS2

DS1 DS1

DS DS

HP HP

R

N

T

S

R

N

T

S

The electrical power must be

provided with protection device

(circuit breaker or fuse) with pole

separation system and minimum

contact gap of 3mm.

!

Outdoor Unit

Indoor Unit

IMPORTANT: * The figures shown in the table are for information purpose only. They should be checked and selected

to comply with the local/national codes of regulations. This is also subject to the type of

installation and conductors used.

** The appropriate voltage range should be checked with label data on the unit. ETL listed is only applicable

to 60Hz power supply only.

Power Supply

VACUUMING AND CHARGING

Vacuuming is necessary to eliminate all moisture and air from the system. The series II Outdoor Unit is provided with

flare valve fittings.

Vacuuming

Before vacuuming, perform leak check for refrigeration

circuit. After the system piping are properly connected,

connect the flexible hoses to the correct charging nipples as

shown in the diagram. Ensure that flexible hose from charging

nipples are connected to the vacuum pump via standard

servicing valves and pressure gauges (gauge manifold).

Vacuum the air conditioner system to at least 500 microns

Hg. Do not start the unit when the system is engaged in

vacuuming.

Charging

Before charging, the vacuum must be held at 500 microns Hg

for at least 15 minutes, then break vacuum by charging R-22

refrigerant. Operate the unit for 15 minutes and ensure the

refrigerant charges is of correct by monitoring running current,

gas and liquid line pressures. Suction and discharge pipe

pressure should be in the region of 75 psig and 275 psig

generally.

After ensuring the system is correctly charged, remove flexible

hose from charging nipples and replace caps.

Gas Pipe

Liquid Pipe

Gas Pipe

Liquid Pipe

Vacuum Pump

Power Supply

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McQuay SB250B Guida d'installazione

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