Midea MVS28A-VA1 User manual

DM12-01.01.02-02en
Service manual
MIV V4+ Indoor units
Compact Four-way Cassette Type
MVS22A-VA1
MVS28A-VA1
MVS36A-VA1
MVS45A-VA1
MVS56A-VA1

DM12-01.01.02-02en MIV V4+ Indoor Units
Compact Four-way Cassette Type MVS-A-VA1
1
Compact Four-way Cassette Type
1. Features .............................................................................................2
2. Specifications....................................................................................3
3. Dimensions........................................................................................6
4. Service Space....................................................................................7
5. Piping Diagram (EXV beside) ...........................................................8
6. Wiring Diagram..................................................................................9
7. Capacity Tables ...............................................................................10
8. Electric Characteristics ..................................................................14
9. Sound Levels...................................................................................15

MIV V4+ Indoor Units DM12-01.01.02-02en
2 Compact Four-way Cassette Type MVS-A-VA1
1. Features
(1) Low operation noise, quiet design for user comfort
--- Streamline plate ensures quietness
--- Creates natural and comfortable environment
(2) Efficient cooling
--- Equal, fast and wide — range cooling
(3) The adoption of the most advanced 3-Dimensional Screw fan
--- Reduces the air resistance passing through
--- Smoothes air flow
--- Makes air speed distribution to the heat exchange uniform
(4) Improvement for easy installation and maintenance
--- Little space is required for installation into a shallow ceiling,
--- Extremely compact casing (570mm in width and depth) enables unit to fit flush into ceilings and
match standard architectural modules
--- Because of the compactness and weight reduction of the main unit and panel, all models can be
installed without a hoist
(5) Optimal design, smaller Control Box, Space saving and convenient for wiring,
Using fire resistance galvanized steel for E-box material. Metal box make the control part more stable and
prevent damaging
(6) Drain up pump with 500 mm pumphead fitted as standard, max. up to 600 mm head.

DM12-01.01.02-02en MIV V4+ Indoor Units
Compact Four-way Cassette Type MVS-A-VA1 3
2. Specifications
Model MVS22A-VA1 MVS28A-VA1
Power supply V-ph-Hz 220~240-1-50 220~240-1-50
Cooling
Capacity kW 2.2 2.8
Input W 51 52
Rated current A 0.175 0.175
Heating
Capacity kW 2.4 3.2
Input W 43 44
Rated current A 0.175 0.175
Indoor fan motor
Model YDK15-6M YDK15-6M
Type AC Motor AC Motor
Input W 34.3 34.3
Capacitor uF 1.2uF/450V 1.2uF/450V
Speed(hi/mi/lo) r/min 658/586/485 658/586/485
Indoor coil
Number of rows 1 1
Tube pitch(a)x row pitch(b) Mm 21*13.37 21*13.37
Fin spacing Mm 1.3 1.3
Fin type (code) Hydrophilic aluminium
Tube outside dia. and type Mm
Ф7 Ф7
Inner groove tube
Coil length x height x width Mm 1310×210×13.37 1310×210×13.37
Number of circuits 2 2
Indoor air flow (Hi/Me/Lo) m3/h 522/414/313 522/414/313
Sound level (sound pressure) dB(A) 35.8/33.4/23.4 35.8/33.4/23.4
Indoor unit
Dimension (W x H x D) Mm 630*265*575 630*265*575
Packing (W x H x D) Mm 675*285*675 675*285*675
Net/Gross weight Kg 17.5/22 17.5/22
Panel
Model T-MBQ-03D1
Dimension (W x H x D) Mm 647*50*647 647*50*647
Packing (W x H x D) Mm 705*113*705 705*113*705
Net/Gross weight Kg 3/5 3/5
Refrigerant Type R410a R410a
Throttle Electric expansive valve
Design pressure MPa 4.4/2.6 4.4/2.6
Refrigerant piping Liquid side/ Gas side Mm 6.35/12.7 6.35/12.7
Connection wiring
Power wiring mm2 3*2.0
Signal wiring mm2 3*0.75（3-core shielded wire）
Drainage water pipe dia. Mm ID Ф20 ODФ25 ID Ф20 ODФ25
Wireless remote controller Wireless remote controller (RM05/BG(T)E-A) (Standard)
Operation temp ℃17～32
Notes:
1. Nominal cooling capacities are based on the following conditions: return air temp.: 27°CDB, 19°CWB, and outdoor
temp.:35°CDB, equivalent ref. piping: 8m (horizontal)
2. Nominal heating capacities are based on the following conditions: return air temp.: 20°CDB, outdoor temp.: 7°CDB, 6°CWB,
and equivalent ref. Piping: 8m (horizontal)

MIV V4+ Indoor Units DM12-01.01.02-02en
4 Compact Four-way Cassette Type MVS-A-VA1
Model MVS36A-VA1 MVS45A-VA1
Power supply V-ph-Hz 220~240-1-50 220~240-1-50
Cooling
Capacity kW 3.6 4.5
Input W 58 58
Rated current A 0.21 0.21
Heating
Capacity kW 4.0 5.0
Input W 50 51
Rated current A 0.21 0.21
Indoor fan motor
Model YDK15-6P YDK15-6P
Type AC MOTOR AC MOTOR
Input W 47.1 47.1
Capacitor uF 1.5uF/450V 1.5uF/450V
Speed(hi/mi/lo) r/min 780/670/540 780/670/540
Indoor coil
Number of rows 2 2
Tube pitch(a)x row pitch(b) Mm 21*13.37 21*13.37
Fin spacing Mm 1.3 1.3
Fin type (code) Hydrophilic aluminium
Tube outside dia. and type Mm
Ф7 Ф7
Inner groove tube
Coil length x height x width Mm 1310×210×26.74 1310×210×26.74
Number of circuits 4 4
Indoor air flow (Hi/Me/Lo) m3/h 610/521/409 610/521/409
Sound level (sound pressure) dB(A) 41.5/35.6/28.8 41.5/35.6/28.8
Indoor unit
Dimension (W x H x D) Mm 630*265*575 630*265*575
Packing (W x H x D) Mm 675*285*675 675*285*675
Net/Gross weight Kg 19/23.5 19/23.5
Panel
Model T-MBQ-03D1
Dimension (W x H x D) Mm 647*50*647 647*50*647
Packing (W x H x D) Mm 705*113*705 705*113*705
Net/Gross weight Kg 3/5 3/5
Refrigerant Type R410a R410a
Throttle Electric expansive valve
Design pressure MPa 4.4/2.6 4.4/2.6
Refrigerant piping Liquid side/ Gas side Mm 6.35/12.7 6.35/12.7
Connection wiring
Power wiring mm2 3*2.0 3*2.0
Signal wiring mm2 3*0.75（3-core shielded wire）
Drainage water pipe dia. Mm ID Ф20 ODФ25 ID Ф20 ODФ25
Wireless remote controller Wireless remote controller (RM05/BG(T)E-A) (Standard)
Operation temp ℃17～32
Notes:
1. Nominal cooling capacities are based on the following conditions: return air temp.: 27°CDB, 19°CWB, and outdoor
temp.:35°CDB, equivalent ref. piping: 8m (horizontal)
2. Nominal heating capacities are based on the following conditions: return air temp.: 20°CDB, outdoor temp.: 7°CDB, 6°CWB,
and equivalent ref. Piping: 8m (horizontal)

DM12-01.01.02-02en MIV V4+ Indoor Units
Compact Four-way Cassette Type MVS-A-VA1 5
Model MVS56A-VA1
Power supply V-ph-Hz 220~240-1-50
Cooling
Capacity kW 5.6
Input W 62
Rated current A 0.25
Heating
Capacity kW 6.1
Input W 62
Rated current A 0.25
Indoor fan motor
Model YDK15-6P
Type AC MOTOR
Input W 47.1
Capacitor uF 1.5uF/450V
Speed(hi/mi/lo) r/min 780/670/540
Indoor coil
Number of rows 2
Tube pitch(a)x row pitch(b) Mm 21*13.37
Fin spacing Mm 1.3
Fin type (code) Hydrophilic aluminium
Tube outside dia. and type Mm
Ф7
Inner groove tube
Coil length x height x width Mm 1310×210×26.74
Number of circuits 4
Indoor air flow (Hi/Me/Lo) m3/h 610/521/409
Sound level (sound pressure) dB(A) 41.5/35.6/28.8
Indoor unit
Dimension (W x H x D) Mm 630*265*575
Packing (W x H x D) Mm 675*285*675
Net/Gross weight Kg 19/23.5
Panel
Model T-MBQ-03D1
Dimension (W x H x D) Mm 647*50*647
Packing (W x H x D) Mm 705*113*705
Net/Gross weight Kg 3/5
Refrigerant Type R410a
Throttle Electric expansive valve
Design pressure MPa 4.4/2.6
Refrigerant piping Liquid side/ Gas side Mm 9.5/15.9
Connection wiring
Power wiring mm2 3*2.0
Signal wiring mm2 3*0.75（3-core shielded wire）
Drainage water pipe dia. Mm ID Ф20 ODФ25
Wireless remote controller Wireless remote controller (RM05/BG(T)E-A) (Standard)
Operation temp ℃17～32
Notes:
3. Nominal cooling capacities are based on the following conditions: return air temp.: 27°CDB, 19°CWB, and outdoor
temp.:35°CDB, equivalent ref. piping: 8m (horizontal)
4. Nominal heating capacities are based on the following conditions: return air temp.: 20°CDB, outdoor temp.: 7°CDB, 6°CWB,
and equivalent ref. Piping: 8m (horizontal)

MIV V4+ Indoor Units DM12-01.01.02-02en
6 Compact Four-way Cassette Type MVS-A-VA1
3. Dimensions
523(Hook-location)
570(Body)
647(Panel)
Drain side
(Unit: mm)
545(Hook-location)
570(Body)
647(Panel)
A
60

DM12-01.01.02-02en MIV V4+ Indoor Units
Compact Four-way Cassette Type MVS-A-VA1 7
4. Service Space
1) There is enough room for installation and maintenance.
2) The ceiling is horizontal, and its structure can endure the weight of the indoor unit.
3) The outlet and the inlet are not impeded, and the influence of external air is the least.
4) The air flow can reach throughout the room.
5) The connecting pipe and drainpipe could be extracted out easily.
6) There is no direct radiation from heaters.
Keep more than 2.3m distance between the panel and ground of the room.
\
Keep at least 1m to the wall of each side.

MIV V4+ Indoor Units DM12-01.01.02-02en
8 Compact Four-way Cassette Type MVS-A-VA1
5. Piping Diagram (EXV beside)
flare nut
flare nut
T2B
gas side
motor
heat exchanger
fan
EXV
liquid side
T2
T1

DM12-01.01.02-02en MIV V4+ Indoor Units
Compact Four-way Cassette Type MVS-A-VA1 9
6. Wiring Diagram
MVS22A-VA1, MVS28A-VA1, MVS36A-VA1, MVS45A-VA1, MVS56A-VA1