Midea MCCU-7CN2 Manuale utente
MCAC-UTSM-2012--05 R407CMCCUTechnicalManual
1
Content
Part 1 General information.........................................................................................................................................2
1.MCCU introduction.................................................................................................................................................2
2.Features...................................................................................................................................................................2
3.Product lineup..........................................................................................................................................................3
4.Nomenclature..........................................................................................................................................................4
5.External appearance..............................................................................................................................................5
6.Refrigerant cycle diagram......................................................................................................................................6
7.Connection accessory list....................................................................................................................................12
8.Specifications........................................................................................................................................................13
9.Dimensions............................................................................................................................................................17
10.Wiring diagram- cooling only...........................................................................................................................20
11.Exploded view- cooling only............................................................................................................................36
Part 2 Installation..........................................................................................................................................................58
1.Note.........................................................................................................................................................................58
2.Installation steps...................................................................................................................................................59
3.Unit location...........................................................................................................................................................60
4.Installation of refrigerant pipes............................................................................................................................63
5.Piping between outdoor unit and indoor unit....................................................................................................66
6.Field wiring.............................................................................................................................................................70
Part 3 Trouble shooting..............................................................................................................................................71
1.Malfunctions...........................................................................................................................................................71
2.Trouble shooting...................................................................................................................................................72
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R407C MCCU Technical Manual MCAC-UTSM-2012-05
2
Part 1 General information
1. MCCU introduction
Midea R407C MCCU (Compressor Condensing Unit) can be free connected with other indoor coils through a set
of connection accessories (supplied by factory).
There are 2 air discharge types, 7 sizes and totally 14 models for MCCU. They are designed to work in a wide
ambient temperature: 18~45 in cooling;℃-10~24 in heating, to adopt different kinds of applications and climate℃
environment.
Midea R407C MCCU is completely assembled, internally wired, charged with R407C refrigerant at the factory,
tested before shipment and ready for installation. They are widely applied in supermarkets, shopping malls, hotels,
airport waiting halls, and so on.
2. Features
2.1 Casing
Unit casing is constructed of heavy gauge galvanized steel plate. Both sides of the casing are waterproof and
anti-corrosion coated. Unit panel structure is allowed to maintenance on one side of the unit. Service panels are
removed easily and reinstalled by removing bolts. The unit is available for fork lifting transportation.
2.2 Compressor
Units are equipped with direct-drive, hermetic, scroll type compressor, and its build-in motor is cooled with suction
gas. The voltage utilization range is plus or minus 10% of unit nameplate voltage. The compressors, incorporating
a built-in muffler, are mounted on springs within a steel housing to give a low-noise level.
2.3 Heat-exchange coils
Inner-threaded and 9.52mm or 7.94mm copper tubes mechanically bonded to a configured hydrophilic aluminum
fin is standard for the heat-exchanger. Coils are leaked tested at 4.2MPa at the factory to ensure the pressure
integrity.
2.4 Fan
Fans are multi-blade vane-axial type, quiet operation and durability. It is directly driven by waterproof motor to
ensure reliable continuous operations. Statically and dynamically balanced drive motor design with
maintenance-free bearing for outdoor installation.
2.5 Three-phase protector
The unit with 3-phase power supply is equipped with phase sequence protector as standard. These devices
protect motors and compressors against problems caused by phase lack, phase imbalance and phase reversal
indication. When the voltage is above or below the normal range, it works and prevents units from suffering
voltage fluctuations.
2.6 Controls
Units are completely factory-wired with necessary controls and wiring terminals for power wiring. Microprocessor
controls the cooling, heating and ventilating modes in response to signals from sensors measuring indoor and
outdoor temperatures.
MCAC-UTSM-2012--05 R407CMCCUTechnicalManual
3
3. Product lineup
Units with cooling only mode:
Outdoor unit Capacity
Model Power supply kW
MCCU-7CN2 220-240V/1N/50Hz 7
MCCU-10CN2
380V/3N/50Hz
10
MCCU-14CN2 14
MCCU-16CN2 16
MCCU-22CN2 22
MCCU-28CN2 28
MCCU-35CN2 35
MCCU-45CN2 45
Units with cooling and heating modes:
Outdoor unit Capacity
Model Power supply kW
MCCU-7HN2 220-240V/1N/50Hz 7
MCCU-10HN2
380V/3N/50Hz
10
MCCU-14HN2 14
MCCU-16HN2 16
MCCU-22HN2 22
MCCU-28HN2 28
MCCU-35HN2 35
MCCU-45HN2 45
R407C MCCU Technical Manual MCAC-UTSM-2012-05
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4. Nomenclature
MCCU - 7 C N2
N1:R410A
N2: R407C
None: R22
Function mode
C: cooling only
H: cooling and heating
Cooling capacity (22 kW)
Midea CCU
MC
A
5
5.
A
C-UTSM-
2
External
a
M
2
012--05
a
ppearan
c
MCC
U
MCCU
-
CCU-22HN
2
c
e
U
-7C(H)N2
-
16C(H)N2
2
, MCCU-2
8
8
HN2
M
C
C
CU-45C(H)
MCCU-1
MCC
U
N2
R4
0
0C(H)N2,
M
U
-22CN2,
M
MCCU-35
C
0
7C MCCU
T
M
CCU-14C(
H
M
CCU-28C
N
C
(H)N2
T
echnical Ma
H
)N2
N
2
nual
R407C MCCU Technical Manual MCAC-UTSM-2012-05
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6. Refrigerant cycle diagram
Cooling only:
4.1 MCCU-7CN2
4.2 MCCU-10CN2，MCCU-14CN2
Sight glass
TXV
Filter drier
Solenoid valve
Connection accessories
HP Switch
Outdoor heat-exchanger
Stop valve
Stop valve
LP Switch
Cooling
Compressor
Accumulator
Indoor unit
Sight glass
TXV
Filter drier
Solenoid valve
Connection accessories
Discharge temp. sensor
HP Switch
Outdoor heat-exchanger
Stop valve
Stop valve
LP Switch
T3
Cooling
Compressor
Indoor unit
MCAC-UTSM-2012--05 R407CMCCUTechnicalManual
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4.3 MCCU-16CN2
4.4 MCCU-22CN2,MCCU-28CN2, MCCU-35CN2
Sight glass
TXV
Filter drier
Solenoid valve
Connection accessories
Cooling
Compressor
Indoor unit
Discharge temp. sensor
HP Switch
Liquid-gas seperator
Outdoor heat-exchanger
Stop valve
Stop valve
LP Switch
T3
Sight glass
TXV
Filter drier
Solenoid valve
Connection accessories
Discharge temp. sensor
HP Switch
Liquid-gas seperator
Outdoor heat-exchanger
Stop valve
Stop valve
LP Switch
T3
Cooling
Compressor
Indoor unit
R407C MCCU Technical Manual MCAC-UTSM-2012-05
8
4.5 MCCU-45CN2
Cooling and heating:
4.6 MCCU-7HN2
Discharge temp. sensor
HP Switch
4-way valve
Liquid-gas seperator
Outdoor heat-exchanger
Stop valve
Stop valve
LP Switch
T3
Heating
Cooling
Compressor
Indoor unit
Sight glass
TXV
Check valve
Filter drier
TXV
Check valve
Solenoid valve
Connection accessories
HP Switch
4-way valve
Outdoor heat-exchanger
Stop valve
Stop valve
LP Switch
Heating
Cooling
Compressor
Accumulator
Indoor unit
Sight glass
TXV
Check valve
Filter drier
TXV
Check valve
Solenoid valve
Connection accessories
MCAC-UTSM-2012--05 R407CMCCUTechnicalManual
9
4.7 MCCU-10HN2, MCCU-14HN2
6.8 MCCU-16HN2
Discharge temp. sensor
HP Switch
4-way valve
Outdoor heat-exchanger
Stop valve
Stop valve
LP Switch
T3
Heating
Cooling
Compressor
Indoor unit
Sight glass
TXV
Check valve
Filter drier
TXV
Check valve
Solenoid valve
Connection accessories
Sight glass
TXV
Check valve
Filter drier
TXV
Check valve
Solenoid valve
Connection accessories
Muffler
Discharge temp.
sensor
HP Switch
4-way valve
Liquid-gas seperator
Outdoor heat-exchanger
Stop valve
Stop valve
LP Switch
T3
Heating
Cooling
Compressor
Indoor unit
R407C MCCU Technical Manual MCAC-UTSM-2012-05
10
6.9 MCCU-22HN2,MCCU-28HN2
6.10MCCU-35HN2
Sight glass
TXV
Check valve
Filter drier
TXV
Check valve
Solenoid valve
Connection accessories
Muffler
Discharge temp.
sensor
HP Switch
4-way valve
Liquid-gas seperator
Outdoor heat-exchanger
Stop valve
Stop valve
LP Switch
T3
Heating
Cooling
Compressor
Indoor unit
Discharge temp. sensor
HP Switch
4-way valve
Liquid-gas seperator
Outdoor heat-exchanger
Stop valve
Stop valve
LP Switch
T3
Heating
Cooling
Compressor
Indoor unit
Sight glass
TXV
Check valve
Filter drier
TXV
Check valve
Solenoid valve
Connection accessories
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