Midea MTA1-76HR User manual

Midea R22 T1 side-discharge duct manual MCAC-UTSM-201301-01
0
Midea R22 T1 Side-discharge Outdoor Unit
& Duct Indoor Unit Technical Manual
Applicable Model:
Indoor unit Outdoor unit
MTA1-76HR MONB-76H
MTA1-76CR MONB-76C
MTA1-96HR MONB-96H
MTA1-96CR MONB-96C
Midea reserves the right to discontinue, or change specification or designs at any time without
notices and without incurring obligations.

MCAC-RTSM-201301-01 Midea R22 T1 side-discharge duct manual
1
Content
1. GENERAL INFORMATION ................................................................. 3
1.1 MEASUREMENTS............................................................................................................ 3
1.2 EXTERNALAPPEARANCE ................................................................................................. 3
1.3 NOMENCLATURE............................................................................................................. 4
2. SPECIFICATION & PERFORMANCE................................................. 5
2.1FEATURES...................................................................................................................... 5
2.2 REFRIGERANT CIRCUIT.................................................................................................... 6
2.3 UNIT STRUCTURE ........................................................................................................... 7
2.4 SPECIFICATIONS............................................................................................................. 8
2.5 DIMENSION (UNIT:MM).................................................................................................. 10
2.6 SERVICE SPACE.............................................................................................................11
2.7WIRING DIAGRAM ..........................................................................................................11
2.8 CAPACITY TABLES......................................................................................................... 13
2.9 ELECTRIC CHARACTERISTICS..........................................................................................11
2.10 SOUND LEVELS .......................................................................................................... 12
2.11 STATIC PRESSURE CURVE............................................................................................ 13
3. INSTALLATION................................................................................. 14
3.1 INSTALLATING INDOOR UNITS ......................................................................................... 14
3.2 DESIGNING AND CONNECTING THE DUCT......................................................................... 16
3.3 INSTALLING OUTDOOR UNITS.......................................................................................... 18
3.4 CONNECTING REFRIGERANT PIPE................................................................................... 20
3.5 VACUUM ...................................................................................................................... 22
3.6 REFRIGERANT REPLENISHMENT QUANTITY...................................................................... 24
3.7 LEAK DETECTION AND HEAT INSULATION ......................................................................... 25
3.8 INSTALL THE DRAIN PIPE................................................................................................ 26

Midea R22 T1 side-discharge duct manual MCAC-RTSM-201301-01
2
3.9 ELECTRIC CONNECTION ................................................................................................ 27
3.10TRIAL RUN ................................................................................................................. 29
4. TROUBLE SHOOTING ..................................................................... 30
4.1 PHENOMENA NOT ATTRIBUTABLE TO FAULTS OF AIR CONDITIONER...................................... 30
4.2 FAULTS OF AIR CONDITIONER AND CAUSE........................................................................ 31
4.3 FAULTS OF REMOTE CONTROLLER AND CAUSE................................................................. 32
4.4 INDOOR UNIT MALFUNCTIONAND PROTECTION CODES...................................................... 34
4.5 OUTDOOR UNIT MALFUNCTION AND PROTECTION CODES .................................................. 36
5. MAINTENANCE ................................................................................ 41
6. EXPLODED VIEW............................................................................. 44
7. ACCESSORIES................................................................................. 60
8. WIRELESS REMOTE CONTROLLER: R51/E (STANDARD)........... 60
8.1 REMOTE CONTROLLER SPECIFICATIONS ......................................................................... 60
8.2 INTRODUCTION OF FUNCTION BUTTONS ON THE REMOTE CONTROLLER.............................. 61
8.3 NAMES AND FUNCTIONS OF INDICATORS ON REMOTE CONTROLLER................................... 62
8.4 OPERATING THE REMOTE CONTROLLER.......................................................................... 63
9. WIRED CONTROLLER: KJR-10B (OPTIONAL).............................. 67
9.1 REMOTE CONTROLLER SPECIFICATIONS.......................................................................... 67
9.2 INTRODUCTION OF FUNCTION BUTTONS ON THE WIRED CONTROLLER................................. 68
9.3 NAMES AND FUNCTIONS OF INDICATORS ON WIRED CONTROLLER ...................................... 70
9.4 OPERATING THE WIRED CONTROLLER............................................................................. 71
9.5WIRED CONTROLLER INSTALLATION................................................................................ 74

MCAC-RTSM-201301-01 Midea R22 T1 side-discharge duct manual
3
1. General information
1.1 Measurements
Type
Model
Dimension
(mm, W×H×D)
Power Supply
Cooling and heating 8HP
Indoor
MTA1-76HR
1,366×450×716
220-240V~, 50Hz, 1Ph
Outdoor
MONB-76H
1,120×1,558×400
380-415V~, 3Ph, 50Hz
Cooling only 8HP
Indoor
MTA1-76CR
1,366×450×716
220-240V~, 50Hz, 1Ph
Outdoor
MONB-76C
1,120×1,558×400
380-415V~, 3Ph, 50Hz
Cooling and heating 10HP
Indoor
MTA1-96HR
1,366×450×716
220-240V~, 50Hz, 1Ph
outdoor
MONB-96H
1,120×1,558×400
380-415V~, 3Ph, 50Hz
Cooling only 10HP
indoor
MTA1-96CR
1,366×450×716
220-240V~, 50Hz, 1Ph
Outdoor
MONB-96C
1,120×1,558×400
380-415V~, 3Ph, 50Hz
1.2 External appearance
Duct type indoor unit Side-discharge outdoor unit

Midea R22 T1 side-discharge duct manual MCAC-RTSM-201301-01
4
1.3 Nomenclature
Indoor unit
Outdoor unit

MCAC-RTSM-201301-01 Midea R22 T1 side-discharge duct manual
5
2. Specification & performance
2.1Features
High capacity of cooling and heating, and energy saving.
Thin size, even can installed at limited place.
All round steel shell, for high quality protection of transportation.
Convenient installation, hidden in the ceiling, unit installation is not hindered by the location of lighting
fixtures or room structure.
Air inlet and outlet flanges are standard and easy for duct connection.
Multi diffusers from one indoor unit supply airflow to multi rooms at the same time. The unit is suitable
for various applications where there are many rooms or halls, such as restaurants, connect halls and
hotels.
High efficient scroll compressor, with thermal protectors to prevent motor overheating.
Easy maintenance.
Only remove the bottom panel, the fan-motor assembly can be drawn out.

Midea R22 T1 side-discharge duct manual MCAC-RTSM-201301-01
6
2.2 Refrigerant circuit
Compressor: R22, scroll compressor is supplied by Hitachi.
Evaporator (Heat exchanger): Copper tube and aluminum fin type heat exchanger.
Fan: Two axial fans adopting two speed levels.
High Pressure Switch: When the discharge pressure of compressor is up to 3.3MPa or higher, the
protection switch will be triggered, and if the discharge pressure is down to 2.4MPa, the protection
switch will be recovered.
Low Pressure Switch: When the suction pressure of compressor equals to 0.05MPa or less, the
protection switch will be triggered, and if the pressure is up to 0.15MPa, the protection switch will be
recovered.

MCAC-RTSM-201301-01 Midea R22 T1 side-discharge duct manual
7
2.3 Unit structure

Midea R22 T1 side-discharge duct manual MCAC-RTSM-201301-01
8
2.4 Specifications
Model
MTA1-76HR
MTA1-76CR
MTA1-96HR
MTA1-96CR
Power supply
220-240V~, 1Ph, 50Hz
220-240V~, 1Ph, 50Hz
Cooling
Capacity
Btu/h
76,000
76,000
96,000
96,000
W
22,300
22,300
28,100
28,100
Input
W
8,100
8,100
10,300
10,300
EER
W/W
2.75
2.75
2.75
2.75
Heating
Capacity
Btu/h
83,600
\
109,500
\
W
24,500
\
32,000
\
Input
W
8,000
\
10,300
\
COP
W/W
3.06
\
3.11
\
Rated input
W
1,100
1,100
1,300
1,300
Rated current
A
4.8
4.8
5.7
5.7
Motor
Model (×quantity)
\
YDK250-4X(×2)
YDK300-4X(×2)
Input (hi/mid/lo)
W
588/484/408
588/484/408
782/677/587
782/677/587
Capacitor
\
15μF/450V
15μF/450V
15μF/450V
15μF/450V
Speed (hi/mid/lo)
r/min
930/840/770
930/840/770
1060/955/865
1060/955/865
Coil
Number of rows
\
4
4
4
4
Tube pitch×row pitch
mm
21×13.37
21×13.37
21×13.37
21×13.37
Fin spacing
mm
1.5
1.5
1.5
1.5
Fin type
\
Hydrophilic aluminum fin
Hydrophilic aluminum fin
Pipe type/size
\
Inner grooved copper pipe/Ф7mm
Coil(W×H)
mm
1,202×378
1,202×378
1,202×378
1,202×378
Number of circuits
\
8+7
8+7
5+4
5+4
Indoor air flow
m3/h
4,500
4,500
5,100
5,100
External static pressure
Pa
100
100
100
100
Indoor noise level
dB(A)
55
55
55
55
Refrigerant type
\
R22
R22
R22
R22
Design pressure
MPa
3.3/2.2
3.3/2.2
3.3/2.2
3.3/2.2
Refrigerant
piping
Liquid side/ Gas side
mm
(Ф9.52/Ф19) ×2
(Ф9.52/Ф19) ×2
Max. pipe length
m
50
50
50
50
Max. difference in level
m
25
25
25
25
Connecting
wire
Power wire
\
3×2.5mm2
3×2.5mm2
3×2.5mm2
3×2.5mm2
Signal wire
\
4×1.0mm2
2×1.0mm2
4×1.0mm2
2×1.0mm2
Drain pipe size (OD)
mm
Ф41
Ф41
Ф41
Ф41
Controller
\
R51/E
R51/CE
R51/E
R51/CE
Net dimension(W×H×D)
mm
1,366×450×716
1,366×450×716
Packing dimension(W×H×D)
mm
1,555×500×875
1,555×500×875
Net/Gross weight
kg
93/105
93/105
96/108
96/108
Notes:
The test conditions: Cooling: Indoor temperature: 27°CDB, 19°CWB; Outdoor temperature: 35°CDB, 24°CWB.
Heating: Indoor temperature: 20°CDB, 15°CWB; Outdoor temperature: 7°CDB, 6°CWB.

MCAC-RTSM-201301-01 Midea R22 T1 side-discharge duct manual
9
Model
MONB-76H
MONB-76C
MONB-96H
MONB-96C
Power supply
380-415V~, 3Ph, 50Hz
380-415V~, 3Ph, 50Hz
Ambient temp in cooling
°C
17～43
17～43
17～43
17～43
Ambient temp in heating
°C
-7~24
\
-7~24
\
Rated input
W
10,600
10,600
13,600
13,600
Rated current
A
17.2
17.2
21.3
21.3
Compressor
Model
\
403DH-64D2-X10J1
503DH-80D2-X10J1
Type
\
Scroll
Scroll
Qty.
\
2
2
Brand
\
Hitachi
Hitachi
Capacity
W
11,800
14,900
Input
W
3,600
4,400
Rated current (RLA)
A
6.3
7.5
Locked rotor Amp
A
42.1
53
Thermal protector
\
Internal (UP18UC188-77G)
Internal (UP18TC16M-77G)
Refrigerant oil
ml
1,200 (SUNISO 4GSD)
1,400 (SUNISO 4GSD)
Fan
Type
\
Axial fan
Axial fan
Axial fan
Axial fan
Motor Model ×Quantity
\
YDK165-6E(B)×2
YDK165-6E(B)×2
Motor Input
W
280/160
280/160
280/160
280/160
Capacitor
\
10μF/450V
10μF/450V
10μF/450V
10μF/450V
Speed (Hi/Lo)
r/min
850/520
850/520
850/520
850/520
Coil
No. of rows
\
1.6
1.6
2
2
Tube pitch ×row pitch
mm
21×13.37
21×13.37
21×13.37
21×13.37
Fin spacing
mm
1.5
1.5
1.5
1.5
Fin type
\
Hydrophilic aluminum fin
Hydrophilic aluminum fin
Pipe size and type
mm
Ф7
Ф7
Ф7
Ф7
Inner grooved copper pipe
Inner grooved copper pipe
Coil (W×H)
mm
1,090×1,512
1,090×1,512
1,080×1,512
1,080×1,512
Number of circuits
\
18
18
18
18
Outdoor noise level
dB(A)
60
60
60
60
Refrigerant
Type/Charge
\
R22/2.3kg×2
R22/2.3kg×2
R22/2.7kg×2
R22/2.7kg×2
Design pressure
MPa
3.3/2.2
3.3/2.2
3.3/2.2
3.3/2.2
Refrigerant
piping
Liquid side/ Gas side
mm
(Ф9.52/Ф19.1) ×2
(Ф9.52/Ф19.1) ×2
Max. pipe length
m
50
50
50
50
Max. difference in level
m
25
25
25
25
Connection
wiring
Power wire
\
5×6.0mm2
5×6.0mm2
5×6.0mm2
5×6.0mm2
Signal wire
\
4×1.0mm2
2×1.0mm2
4×1.0mm2
2×1.0mm2
Net dimension (W×H×D)
mm
1,120×1,558×400
1,120×1,558×400
Packing dimension (W×H×D)
mm
1,270×1,720×565
1,270×1,720×565
Net/ Gross weight
kg
180/198
175/193
185/202
180/198
Notes:
The test conditions: Cooling: Indoor temperature: 27°CDB, 19°CWB; Outdoor temperature: 35°CDB, 24°CWB.
Heating: Indoor temperature: 20°CDB, 15°CWB; Outdoor temperature: 7°CDB, 6°CWB.