McQuay SB250B User manual

AIR COOLED, DUCTED
SPLIT TYPE AIR-CONDITIONERS
INSTALLATION MANUAL
Group: SPLIT TYPE
Part Number: A08019025528
Date: MAY 2001
IM-MHSB-0501-McQuay
© 2001 McQuay International

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
r
glementation concernant les
d
é
chets
d
es
é
quipements
é
lectriques e
t
é
lectroniques (r
é
r
r
é
ê
é
s
é
par
é
r
r
m
ent par un centre de collect
e
é
é
é
î
î
tre ces centres. Ceci
îî
é
enne
.
Questo prodotto
è
soggetto alle disposizioni RAEE (Rifiuti di apparecchiature elettriche ed elettroniche)
.
à
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
ñ
á
í
fico
í
í
de colecc
i
ó
solamente aplicable a los p
a
í
ses de la
U
n
i
ó
n
Europea
.
G
er
ä
ä
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
Obstacle
Obstacle
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
COMP
SW
SW
TDR
TH
SW: Switch TH: Thermostat control
TDR: Timer
Power Supply
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
Power supply
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 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