McQuay M5MSX 020 A User manual

M5MSX-2008
DC Inverter Multi Split
Models: M5MSX 020 A/AR
M5MSX 025 A/AR
M5MSX 030 A/AR
Catalog
Библиотека СОК 

Table of Contents
Nomenclature ....................................................................................................................1
-Product Line up
Features ............................................................................................................................4
Application Information......................................................................................................5
- Operating Range
- Refrigerant Circuit Diagrams
- Controllers
- Installation
Engineering and Physical Data .......................................................................................25
-Specifications
Performance Data ...........................................................................................................41
- Performance Table
Dimensional Data ............................................................................................................44
Electrical Data .................................................................................................................48
Wiring Diagram ...............................................................................................................52
Servicing and Maintenance .............................................................................................55
Troubleshooting...............................................................................................................56
Exploded View and Part List ...........................................................................................60
This manual supercedes M5MSX-2007
Note : Installation and maintenance are to be performed only by qualified personnel who are
familiar with local codes and regulations, and experienced with this type of equipment.
Caution : Sharp edges and coil surfaces are a potential injury hazard. Avoid contact with them.
Warning : Moving machinery and electrical power hazard. May cause severe personnel
injury or death. Disconnect and lock off power before servicing equipment.
“McQuay” is a registered trademark of McQuay International. All rights reserved.
© 2008 McQuay International. All rights reserved throughout the world.
Bulletin illustrations cover the general appearance of McQuay International products at the time of publication.
We reserve the right to change design and construction specifications at any time without notice.

Indoor
1
Nomenclature
TICA-
Model T
yp
e
R : Heatpum
p
Omitted if Coolin
g
Onl
y
Series
C : C series
Capacit
y
020 : 20,000 Btu/h
Model Name
WM : Wall Mounted
Refrigerant
5 : R410A
Brand
M : Mcqua
y
Electrical
A
: 220
–
240V/1Ph/50H
z
Controller Type
L : Longertech E-Scroll
T : OYL R&D E-Scroll
WM 020 G R5M X
Product t
yp
e
X : DC Inverte
r
C
Market Region
C : Export with CE mark
U : ETL s
p
ec
Air Treatment Devices & Control
I : Negative Ion with wireless controller
N : NTP with wireless controller
Others
A
: First Issue

Outdoor
2
L AOCA-
Model Type
R : Heatpum
p
Omitted if Coolin
g
Onl
y
Series
A
:
A
series
Capacit
y
20 : 20,000 Btu/h
Model Name
MS : Multi Split Condensing Unit
Refrigerant
5 : R410A
Brand
M : Mcqua
y
Electrica
l
A
: 220
–
240V/1Ph/50Hz
Market Region
O : Standard Uni
t
I : Gold Fin
Specifications Variation
Controller Type
L : Longertech E-Scroll
T : OYL R&D E-Scroll
Others
A
: First issue
C : Export with CE mark
MS 020 A R
5M X
Product type
X : DC Inverte
r

M5MSX-A/AR Product line-up
3
PCB
lortnoCfR
ellirG
ACOLA X X X X X
ACOLA X X X X X
ACOLA X X X X X
ACOLA X X X X X
ACOLA X X X X X
ACOLA X X X X X
ylnOgnilo
o
CpmuPtaeH
020A
025A
030A
020AR
025AR
030AR
Classification
rosserpmoC
gnikraM
woblEniarD
gnikraMECO/W
gnikraMEC
.pmoCllorcS.vnICD
yratoRniwT.vnICD
VXE
M5MSX
erutalcnemoN
)AACSDJL(RETREVNICD
tesdnaH
11G
0.2AV
0.1DIJL
noIevitageN
retliFonaN
PTN
EC
ON
010G ACITC XX XX X
015G ACITC XX XX X
020G ACITC XX XX X
010GR ACITC X X X X X
015GR ACITC X X X X X
020GR ACITC X X X X X
pmuPt
a
eH
M5WMX Nomenclature
Classification
ylnOgnilooC
BCP
noitacifiruPriA
gnikraM
M5WMX-G/GR Product line-up

Features
Higher Energy Savings
The compressor in McQuay DC Multi Split Inverter is programmed to run at the optimum speed. The
compressor speed is controlled by input frequency that varies according to the indoor load requirements.
Once the indoor set temperature is achieved, the input frequency supply to the compressor will be reduced.
Hence, less energy is required to maintain the unit operation and this will consume less energy.
Fast Cooling
During the unit start up, the inverter air-conditioner system takes a shorter period to achieve the set room
temperature than conventional air-conditioner systems. Thus, the inverter system offers fast cooling features.
Low Starting Current
Taking advantage of the ability to modulate the compressor speed, inverter models are designed with “soft
starter” feature. The compressor motor will not draw high current during start up.
Zero-Ozone Depleting Potential Refrigerant
Introducing the new type of refrigerant – R410A which is environmental friendly with Zero Ozone Depletion
Potential (ODP = 0). R410A also provides the higher volumetric capacity and better refrigerating effect per
unit of volume.
Advance Technology
The traditional conventional air conditioners repeat “the start” and “the stop” during the thermostat cycle off
and causes the room temperature to be unstable. Incorporating fuzzy logic control into the McQuay DC Multi
Split Inverter design enables greater flexibility in handling the system control.
This result in:
•Powerful, efficient and economical operation.
•Even room temperature control.
•Constant and quiet compressor operation.
•Enhanced system reliability and reduced maintenance costs.
Low Noise Operation
McQuay DC Multi Split Inverter System has been designed to use the state-of-the-art, twin rotary compressor.
In this compressor, the roller phases are staggered 180° apart from each other. With this design, the centrifugal
forces of one roller is counterbalanced by the force of the other roller, whereby reducing the vibration of the
compressor. This makes the unit quieter and less vibration.
To further reduce the noise level, brushless DC motor is used. This further reduces noise generated by the
fan motor. Additionally, by using a bigger sized fan blade, a lower rpm is possible while maintaining ample
airflow.
Improved Compressor Life Span
For the McQuay DC Multi Split Inverter system, once the unit is started, the compressor rotation speed is
steadily ramp up or down based on load requirement throughout the operation. This control method gives
the compressor motor a smooth operation. It helps to reduce the wear and tear of the compressor motor. In
the long run, the life span of compressor is increased.
4

Outdoor temp. (°C DB)
Application Information
Ensure the operating temperature is in allowable range
Cooling only
Heat pump
Heating Cooling
Outdoor temp. (°C WB)
Outdoor temp. (°C DB)
15 24
19
35
46
STD
-9
15 21
6
27
18
STD
Indoor temp. (°C WB)
Indoor temp. (°C WB) Indoor temp. (°C WB)
5
The use of your air conditioner
outside the range of working
temperature and humidity can
result in serious failure.
15 24
19
35
46
STD
Cautions:
Operating Range

Refrigerant Circuit Diagram
Model : M5MSX 020A
6

Model : M5MSX 020AR
7

Model : M5MSX 025A
8

Model : M5MSX 025AR
9

Model : M5MSX 030A
10

Model : M5MSX 030AR
11

FANTURBO
SWING
ON TIMER
SLEEP MODE
IONIZER
OFF TIMER
Temperature Setting
•To set the desired room
temperature, press the button to
increase or decrease the set
temperature.
•The temperature setting range is
from 16°C to 30°C
•Press both buttons simultaneously
to toggle the temperature setting
between °C and °F
Turbo Mode
•Press the TURBO button to
achieve the required set
temperature in a short time.
ON Timer Setting
•Press the SET button will activate
the on timer function.
•Set the desired on time by
pressing the SET button
continuously.
•Press the CLR button to cancel the
off timer setting
Sleep Mode
•Press the button to activate sleep
mode. This function is available
under COOL, HEAT & AUTO
mode.
•When it is activated in COOL
mode, the set temperature will be
increased 0.5°C after 30mins, 1°C
after 1 hour and 2°C after 2 hours.
•When it is activated in HEAT
mode, the set temperature will be
decreased 1°C after 30mins, 2°C
after 1 hour and 3°C after 2 hours.
Personalised Setting
•Press and hold the button for 3s to
initiate personalized setting.
•Set the individual setting e.g.
MODE, SET TEMP or FAN SPEED
and leave for 4s to save
•2 groups of settings are allowed to
stored in the handset
Fan Speed Selection
•Press the button until the desired
fan speed is achieved.
Operating Mode
•Press the MODE button to select
the type of operating mode.
•For Cooling only unit, the available
modes are: COOL, DRY & FAN.
•For Heatpump unit, the available
modes are: AUTO, COOL, DRY,
FAN & HEAT.
OFF Timer Setting
•Press the SET button will activate
the off timer function.
•Set the desired off time by
pressing the SET button
continuously.
•Press the CLR button to cancel the
off timer setting
Automatic Air Awing
•Press the SWING button to
activate the automatic air swing
function.
•To distribute the air to a specific
direction, press the SWING button
and wait until the louver move to
the desired direction and press the
button once again.
On/Off Button
•Press Once to start the air
conditioner
•Press again to stop the unit
Clock Time Setting
•Press button + or - to increase or
decrease the clock time.
Ionizer
•Press the button to activate the
negative Ion function, which will
refresh the indoor air effectively.
* Depends on Specifications
12
G11 Remote Controller
Controllers

Warning
IMPORTANT: DO NOT INSTALL OR USE THE AIR CONDITIONER UNIT IN A LAUNDRY ROOM
•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 hazards due to installation failure.
•All electrical wiring must not touch the refrigerant piping, compressor or any moving parts
of the fan motors.
•Confirm that the unit has been switched OFF before installing or servicing the unit.
•Do not touch the compressor or refrigerant piping without wearing gloves.
Safety Precautions
Before installing the air conditioner unit, please read the following safety precautions carefully
Installation
Caution
Please take note of 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 units panel is closed after service or installation.
Unsecured panels will cause unit to operate noisily.
13

Installation of the indoor unit
The indoor unit must be installed in such a way so as to
prevent short circuit of the cool discharged air with the hot
return air. Please follow the installation clearance shown
in the figure. Do not place the indoor unit where there
could be direct sunlight shinning on it. Also, this location
must be suitable for piping drainage and be away from
doors or windows.
Air flow direction
Maintenance &
Servicing Space
50.0 mm 50.0 mm
123
4
5
Piping Routing
Routing of piping
Remove the screw holding the front panel.
The refrigerant piping can be routed to the unit in a
number of ways(left or right from the back of the unit) by
using the cut-out holes on the casing of the unit(see figure).
Bend the pipes carefully to the required position in order to
align it with the holes. For the right hand and rear side out,
hold the bottom of the piping and then position it to the
required direction(see figure). The condensation drain hose
can be taped to the pipes.
Unit piping
Fix with vinyl tape
Drain hose
Mounting installation plate
Ensure that the wall is strong enough to with-
stand the weight of the unit. Otherwise, it is
necessary to reinforce the wall with plates,
beams or pillars.
Use the level gauge for horizontal mounting,
and fix it with 4 suitable screws.
In case the rear piping draws out, drill a hole
65mm in diameter with a cone drill, slightly
lower on the outside wall (see figure)
∅65.0mm Hole in the wall
Screw position in the wall
Hole With Cone Drill
Indoor Side
Outdoor Side
Mount the unit onto the installation plate
Hook the indoor onto the upper portion of the
installation plate(Engage the two hooks at the rear
top of the indoor unit with the upper edge of the
installation plate). Ensure that the hook are prop-
erly seated on the installation plate by moving it to
the left and right.
Water drainage piping
The indoor pipe must be in a downward gradient
for smooth drainage. Avoid situations that are
likely to cause water leak.
14

VERTICAL HEIGHT
DIFFERENCE MAX. H
L4
L3
L2
L1
OUTDOOR UNIT
INDOOR UNIT
Installation Diagram
Indoor unit combination for outdoor unit M5MSX 020A/AR, M5MSX025A/AR and M5MSX030A/AR
Indoor units with model name M5WMX 010G/GR, M5WMX015G/GR and M5WMX020G/GR could be
coupled with this outdoor unit.
The following table shows the possible coupling combinations available.
No Coupling Combinations (5WMX-G/GR)
M5MSX020A/AR M5MSX025A/AR M5MSX030A/AR
1 10+10 10+10+10 10+10+10+10
2 10+15 10+10+15 10+10+10+15
3 15+15 10+10+20 10+10+10+20
4 10+15+15 10+10+15+15
5 10+15+20 10+10+15+20
6 15+15+20 10+15+15+15
7 15+15+15+15
For further details on opearation combinations, total capacity and other technical specifications, please refer
to the technical manual.
15

Installation of outdoor unit
The outdoor unit must be installed in such a way, so as to prevent short circuit of the hot discharged air or
obstruction to the smooth air flow. Please follow the installation clearance shown in the figures below. Select
the coolest possible place where intake air temperature is not greater than the outside air temperature
(maximum 45°C/113°F).
Note: If there is any obstacle higher than 2m (6.56ft), or if there is any obstruction at the upper part of the unit,
please allow more space than the figure indicated in the table shown below.
Installation Clearances
Dimensions A B C D
Minimum
Distance(mm) 300 1000 300 500
PLEASE
REMOVE
SERVICE
PANEL
PLEASE
REMOVE
ACCESS PANEL
& PLASTIC
VALVE COVER
WHEN
CONNECTING
THE PIPING
AND
CONNECTING
CORD.
PUSH & PULL UP
CD
AB
ECAPSECI
VR
E
S
RIANRUTER
ELCATSBO
E
GRAHCSIDRIA
ELCATSBO
RIA
N
RU
T
E
R
E
L
CATSBO
ELCATSBO
Before installation the piping and connecting cord, please remove the access panel and plastic valve cover
or service panel for easy access and safety. Refer to figures shown below.
16

Refrigerant piping work
Piping length and elevation
If the pipe is too long, both capacity and reliability of the unit will drop. As the number of bends increases,
resistance to the flow of refrigerant system increases, thus lowering cooling capacity. As a result, the com-
pressor may become defective. Always choose the shortest path and follow the recommentdations as
tabulated below.
Individual indoor unit can have a maximum length of 20 m (65.6ft), maximum elevation of 5 m (32.8ft) and
maximum number of bends of 10, however, the total pipe length must not exceed 30m (M5MSX20AR), 50m
(M5MSX025AR) or 60m (M5MSX030AR) depending on the model of the outdoor unit.
Remark: The refrigerant pre-charged in the outdoor unit is for total piping length up to 20m for model
M5MSX020A/AR and 40m for model M5MSX025A/AR and M5MSX030A/AR.
VERTICAL HEIGHT
DIFFERENCE MAX. H
L4
L3
L2
L1
OUTDOOR UNIT
INDOOR UNIT
17
Long Piping
Item Model M5WMX010
G/GR
M5WMX015
G/GR
M5WMX020
G/GR
O/D
Precharged
Charge Amount for Additional
Piping Length
M5MSX020A/AR 20 20 20 20m 25m 30m
1 (1 to 2) (Total length L
1
+L
2
= 30m) 1650g 0 +100g +200g
M5MSX025A/AR 20 20 20 40m 45m 50m
2 (1 to 3) (Total length L
1
+L
2
+ L
3
= 50m) 2320g 0 +100g +200g
M5MSX030A/AR 20 20 20 40m 50m 60m
3 (1 to 4) (Total length L
1
+L
2
+ L
3
+L
4
= 60m) 0 +200g +400g
Coupling Model M5WMX010G/GR M5WMX015G/GR M5WMX020G/GR
Max. Elevation, H (m/ ft) 5 5 5
Max. Number of Bends 10 10 10
Liquid Pipe Size 1/4” 1/4” 1/4”
Gas Pipe Size 3/8” 1/2” 1/2”

Piping Works
• Do not use contaminated or damaged copper tubing. Do
not remove plastic, rubber plugs and brass nuts from the
valves, fittings, tubings and coils until you are ready to
connect suction or liquid line into valves or fittings.
• If any brazing work is required, ensure that the nitrogen
gas 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 connection pipe with a pipe cutter.
• Remove burrs from cut edges of the pipes with remover.
Hold the end of the pipe downwards to prevent metal
chips from entering the pipe.
• Insert the flare nuts, mounted on the connection parts of
both the indoor unit and outdoor unit onto the copper
pipes.
• Flare the pipe with extra length above the flaring tool as
shown in the table below.
• The flare edge must be even and not cracked or
scratched.
Copper tube
Swaging block
∅ Tube, D A(mm)
Inch mm Imperial Rigid
1/4” 6.35 1.3 0.7
3/8” 9.52 1.6 1.0
1/2” 12.70 1.9 1.3
5/8” 15.88 2.2 1.7
3/4” 19.05 2.5 2.0
PIPECONNECTION PIPECONNECTION PIPECONNECTION
INDOOR
UNITA
INDOOR
UNITB INDOOR
UNITC
INDOOR
UNITB
INDOOR
UNITA
INDOOR
UNITC
INDOOR
UNITB
INDOOR
UNITA
INDOOR
UNITD
Pos. M5MSX020A/AR M5MSX025A/AR M5MSX030A/AR
Liquid Gas Liquid Gas Liquid Gas
A 1/4” 3/8” 1/4” 3/8” 1/4” 3/8”
B 1/4” 3/8” 1/4” 3/8” 1/4” 3/8”
C 1/4” 3/8” 1/4” 3/8”
D 1/4” 3/8”
Cutting copper tube
1/4t
Remove burr Indoor
Piping connection to the units
• The outdoor unit is equipped with two to
four sets of flare joints depending on O/D
unit model. Refer to table below for flare
joint size and location.
• In the case where gas pipe from the indoor
unit does not match the outdoor flare joints,
two different flare joint connectors are
provided. The connector should be connected
as shown in figure.
No Flare Joint Connectors
13/8” to 1/2” connector
21/2” to 3/8” connector
• 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.
Pipe Size mm / (in) Torque Nm /(ft - Ib)
6.35 (1/4) 18 (13.3)
9.53 (3/8) 42 (31.0)
12.70 (1/2) 55 (40.6)
FLARE JOINT CONNECTOR FLARE TUBE
INDOOR PIPING
FLARE NUT
SPANNER TORQUE WRENCH
18