Midea RSJ-420/PZN1-H, RSJ-800/SZN1-H Technical Manual
Midea R410A Direct Heating Commercial Heat Pump 50Hz Technical Manual MCAC-HTSM-201506
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Midea R410A
Direct Heating Commercial Heat Pump
50Hz
Technical Manual
Applicable Model:
RSJ-420/SZN1-H
RSJ-800/SZN1-H
Midea reserves the right to discontinue, or change specification or designs at any time without notices and
without incurring obligations.
MCAC-HTSM-201506 Midea R410A Direct Heating Commercial Heat Pump 50Hz Technical Manual
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Content
Part. 1 General information ............................ 3
Part. 2 Performance ........................................ 5
Part. 3 Installation ......................................... 26
Part. 4 Controller ........................................... 62
Midea R410A Direct Heating Commercial Heat Pump 50Hz Technical Manual MCAC-HTSM-201506
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Part. 1 General information
1. Model Names of Units ........................................................... 4
2. External Appearance ............................................................. 4
3. Nomenclature ....................................................................... 4
MCAC-HTSM-201506 Midea R410A Direct Heating Commercial Heat Pump 50Hz Technical Manual
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1. Model Names of Units
Model
Power supply
Direct-heating Type
RSJ-420/SZN1-H
380-415V~, 3Ph, 50Hz
RSJ-800/SZN1-H
380-415V~, 3Ph, 50Hz
2. External Appearance
RSJ-420/PZN1-H
RSJ-800/PZN1-H
3. Nomenclature
RSJ - 420 / S Z N1 - H
H type
Refrigerant type - N1: R410A
Direct-heating type & Pressure water tank
Power supply: 380-415V 3Ph 50Hz
Nominal heating capacity (420×100W)
Midea heat pump water heater
Midea R410A Direct Heating Commercial Heat Pump 50Hz Technical Manual MCAC-HTSM-201506
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Part. 2 Performance
1. Features .............................................................................. 6
2. Specifications ...................................................................... 7
3. Dimensions (Unit: mm) ........................................................ 9
4. Service Space (Unit: mm) .................................................. 11
5. Refrigerant circuit .............................................................. 13
6. Wiring Diagrams ................................................................ 15
7. Electric Characteristics ...................................................... 22
8. Capacity Table ................................................................... 23
9. Accessories ....................................................................... 25
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1. Features
High capacity of hot water producing,
High efficient, COP is up to 4.04 (39kW) and 4.00 (80kW).
Unit applies refrigerant heating technology to increase the total energy absorb.
Refrigerant E-heater design can ensure that hot water can be produced stably during defrosting
period.
Multi protection: High and low pressure protection, over-load current protection, anti-freezing
function, etc.
Multi-temperature sensors always monitor the unit operating status.
Max. 4 units can be connected in parallel (39kW); Max. 2 units can be connected in parallel
(80kW).
User-friendly wired controller as standard, real-time clock function, power-off memory function.
Midea R410A Direct Heating Commercial Heat Pump 50Hz Technical Manual MCAC-HTSM-201506
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2. Specifications
Model
RSJ-420/SZN1-H
Power supply \ 380-415V~, 3Ph, 50Hz
Water heating
Capacity
kW
39.0
Input
kW
9.65
COP
W/W
4.04
Running ambient temperature
\
-15 ºC ～46 ºC
Outlet water temperature
\
Default 56ºC, 40 ºC～60 ºC
Rated input
kW
14.5
Rated current
A
24.0
Noise level
dB(A)
66
Refrigerant type
\
R410A
Quantity
\
4.5kg
Refrigerant control
\
EXV
Fan
Type
\
Axial fan
Motor model
\
YDK550-6E
Motor brand \ Yongan/Dayang/Welling/Matchwell
Quantity
\ 1 Motor input
W
810/680
Capacitor
25μF/450V
Speed (Hi/lo)
r/min
850/750
Coil
Type
\
Copper tube and aluminum fin
Tube size
mm
Ф7
No. of rows
\ 2 Fin spacing
mm
1.5
Tube pitch(a)×row pitch(b)
mm
21×13.37
Length× height
mm
2,827×798
Number of circuits
\
19
Compressor
Model
\
ZP120KCE-TFD-522
Type
\
Scroll
Brand
\
Copeland
Quantity
\ 1 Capacity
kW
29.2
Input
W
9,200
Rated current (RLA) A 20
Locked rotor Amp.(LRA) A 118
Thermal protector \ Internal
Refrigerant oil
ml
3,253
Controller \ KJR-51/BMKE-A (Wired controller)
Air flow
m3/h
≥12,000
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Continues
Model
RSJ-420/SZN1-H
Water pipe
Inlet pipe
mm
DN32
Outlet pipe
mm
DN32
Hot water yield
m3/h
0.85
Dimension (W×H×D)
mm
1,015×1,775×1,026
Packing (W×H×D)
mm
1,070×1,900×1,030
Net/Gross weight
kg
323/343
Notes:
The heating capacity is tested under a standard ambient with temperature of outdoor 20 ºC (DB)/15 ºC (WB),
inlet water temperature of the unit is 15 ºC , outlet water temperature is 55 ºC .
Model
RSJ-800/SZN1-H
Power supply \ 380-415V~, 3Ph, 50Hz
Water
heating
Capacity
kW
80.0
Input
kW
20.00
COP
W/W
4.00
Running ambient temperature
\
-15 ºC ～46 ºC
Outlet water temperature
\
Default 56ºC, 40 ºC～60 ºC
Rated input
kW
26.0
Rated current
A
34.0
Noise level
dB(A)
68
Refrigerant type
\
R410A
Quantity
\
4.4kg×2
Refrigerant control
\
EXV
Fan
Type
\
Axial fan
Motor model
\
YDK550-6E
Motor brand \ Yongan/Dayang/Welling/Matchwell
Quantity
\
2
Motor input
W
810/680
Capacitor
25μF/450V
Speed (Hi/lo)
r/min
850/750
Coil
Type
\
Copper tube and aluminum fin
Tube size
mm
Ф7
No. of rows
\ 2 Fin spacing
mm
1.5
Tube pitch(a)×row pitch(b)
mm
21×13.37
Length× height
mm
(2,827×798)+(2,827×798)
Number of circuits
\
20+20
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Continues
Model
RSJ-800/SZN1-H
Compressor
Model
\
SH120A4ALC
Type
\
Scroll
Brand
\
Danfoss
Quantity
\ 2 Capacity
kW
29.95
Input
W
9,462
Rated current (RLA) A 20.7
Locked rotor Amp.(LRA) A 142
Thermal protector \ Internal
Refrigerant oil
ml
3,300
Controller \ KJR-51/BMKE-A (Wired controller)
Air flow
m3/h
≥25,000
Water pipe
Inlet pipe
mm
DN50
Outlet pipe
mm
DN50
Hot water yield
m3/h
1.72
Dimension (W×H×D)
mm
1,015×1,775×1,026
Packing (W×H×D)
mm
1,070×1,900×1,030
Net/Gross weight
kg
599/627
Notes:
The heating capacity is tested under a standard ambient with temperature of outdoor 20 ºC (DB)/15 ºC (WB),
inlet water temperature of the unit is 15 ºC , outlet water temperature is 55 ºC .
3. Dimensions (Unit: mm)
RSJ-420/SZN1-H
Top view
MCAC-HTSM-201506 Midea R410A Direct Heating Commercial Heat Pump 50Hz Technical Manual
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RSJ-800/SZN1-H
Top view
Midea R410A Direct Heating Commercial Heat Pump 50Hz Technical Manual MCAC-HTSM-201506
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4. Service Space (Unit: mm)
RSJ-420/SZN1-H
MCAC-HTSM-201506 Midea R410A Direct Heating Commercial Heat Pump 50Hz Technical Manual
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RSJ-800/SZN1-H
Midea R410A Direct Heating Commercial Heat Pump 50Hz Technical Manual MCAC-HTSM-201506
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5. Refrigerant circuit
RSJ-420/SZN1-H
MCAC-HTSM-201506 Midea R410A Direct Heating Commercial Heat Pump 50Hz Technical Manual
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RSJ-800/SZN1-H
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6. Wiring Diagrams
RSJ-420/SZN1-H
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Item
Detail
0
Communication port for other unit
1
Communication port for wired controller
2
System low pressure protection connector
3
System high pressure protection connector
4
E-heater Temp. Sensor of refrigerant connector
5
Water tank (pook) Temp. sensor connector, only the host is valid, the slave is invalid
6
Water outlet Temp. sensor connector
7
E-heater pipe Temp. sensor connector of refrigerant
8
Water inlet Temp. sensor connector
9
Discharge Temp. sensor connector
10
Suction sensor connector
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11
T3: Evaporator Temp. sensor connector
T4: Outdoor ambient Temp. sensor connector
12
Detection port for compressor current
13
S3-1: Remote ON/OFF functional status (OFF: inactive (default); ON: active)
S3-2: Defrost periodical choice (OFF: default time by program; ON: 28 minutes)
S3-3,4: Auxiliary heater choice (OFF: indicates 0, ON indicates 1, the factory default
is 00)
14
Address dial code
0~3 separately stands for address 0~3, means 0~3 set units. When
dial the dial switch to 4 or more, then it will invalid.
Each module of water heat pump has the electric control function. Set the host unit
through the address dial code on electric control board. Stipulate the unit with
address dial code 0# as the host unit. Only after setting the host unit , the function of
direct communication with wired controller and other function can be activated.
15
Left side: CHECK, spot check button, for checking the operating state of unit.
Right side: FORCE, constraint button, special function for constraint exit.
16
Digital screen.
17
3-phase, 4-wire system power input. Lack of phase or wrong phase only is detected
on the initial stage of power on without detection during operation.
18
High and low fan speed.
19
Tranformer input, 220V AC current.
20
Control port for compressor.
21
Refrigerant E-heater control port.
22
Electric ball valve on.
23
Electric ball valve off.
24
Control port for crankcase E-heating belt.
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25
One-way solenoid control port.
26
4-way valve control power.
27
Left side: Circulating water pump control; right side: E-heater control. Only supply
ON/OFF signal, not supply power signal.
28
Right side: Remote alarm signal output. Only supply non-source ON/OFF signal, not
supply power signal.
29
EXV connector.
30
Electric proportional valve connector.
31
Transformer output connector.
32
Power connector for wired controller.
33
Remote control port.
34
Water flow switch connector.
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RSJ-800/SZN1-H
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Item
Detail
0
Communication port for other unit
1
Communication port for wired controller
2
System low pressure protection connector
3
System high pressure protection connector
4
E-heater Temp. Sensor of refrigerant connector
5
Water tank (pook) Temp. sensor connector, only the host is valid, the slave is invalid.
6
Water outlet Temp. sensor connector
7
E-heater pipe Temp. sensor connector of refrigerant
8
Water inlet Temp. sensor connector
9
Discharge Temp. sensor connector
10
Suction sensor connector
11
T3: Evaporator Temp. sensor connector
T4: Outdoor ambient Temp. sensor connector
12
Detection port for compressor current
13
S3-1: Remote ON/OFF functional status (OFF: inactive (default); ON: active)
S3-2: Defrost periodical choice (OFF: default time by program; ON: 28 minutes)
S3-3,4: Auxiliary heater choice (OFF: indicates 0, ON indicates 1, the factory default
is 00)
Midea R410A Direct Heating Commercial Heat Pump 50Hz Technical Manual MCAC-HTSM-201506
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14
Address dial code
0~1 separately stands for address 0~1, means 0~1 set units. When
dial the dial switch to 2 or more, then it will invalid.
Each module of water heat pump has the electric control function. Set the host unit
through the address dial code on electric control board. Stipulate the unit with
address dial code 0# as the host unit. Only after setting the host unit , the function of
direct communication with wired controller and other function can be activated.
15
Left side: CHECK, spot check button, for checking the operating state of unit.
Right side: FORCE, constraint button, special function for constraint exit.
16
Digital screen.
17
3-phase, 4-wire system power input. Lack of phase or wrong phase only is detected
on the initial stage of power on without detection during operation.
18
High and low fan speed.
19
Tranformer input, 220V AC current.
20
Control port for compressor.
21
Refrigerant E-heater control port.
22
Electric ball valve on.
23
Electric ball valve off.
24
Control port for crankcase E-heating belt.
25
One-way solenoid control port.
26
4-way valve control power.
27
Left side: Circulating water pump control; right side: E-heater control. Only supply
ON/OFF signal, not supply power signal.
28
Right side: Remote alarm signal output. Only supply non-source ON/OFF signal, not
supply power signal.
29
EXV connector.
MCAC-HTSM-201506 Midea R410A Direct Heating Commercial Heat Pump 50Hz Technical Manual
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30
Electric proportional valve connector.
31
Transformer output connector.
32
Power connector for wired controller.
33
Remote control port.
34
Water flow switch connector.
Notes: RSJ-800/SZN1-H has two same PCB boards. Here only explains one PCB board.
7. Electric Characteristics
Model
RSJ-420/SZN1-H
RSJ-800/SZN1-H
Outdoor unit
Hz
50
50
Voltage
380~415V, 3Ph
380~415V, 3Ph
Min.
342V
342V
Max.
456V
456V
Power supply
MCA
21
26
TOCA
30
60
MFA
30
60
Compressor
MSC
118
142
RLA
16.6
20.7
OFM
kW
0.8
0.8
FLA
3.7
3.7
Note:
MCA: Min. Current Amps. (A) MFA: Max. Fuse Amps. (A)
TOCA: Total Over-current Amps. (A) MSC: Max. Starting Amps. (A)
RLA: Rated Locked Amps. (A) OFM: Outdoor Fan Motor
kW: Fan Motor Rated Output (kW) FLA: Full Load Amps. (A)
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8. Capacity Table
RSJ-420/SZN1-H
Mode
OT(℃)
Inlet water Temp. (℃)
Outlet water Temp.
(℃)
Capacity(kW)
COP
DB
RSJ-420/SZN1-H
43
29
60
52.46
5.03
40
29
45
55.14
5.89
60
52.67
5.19
35
29
45
51.13
5.36
30
15
45
46.31
5.32
25
15
45
42.62
4.86
55
44.28
4.34
20
15
55
39.76
4.01
15
9
55
37.54
3.90
7
9
40
32.23
4.65
2
9
0
9
-7
9
-15
9
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RSJ-800/SZN1-H
Note: OT – Outdoor Temperature (DB);
Mode
OT(℃)
Inlet water Temp. (℃)
Outlet water Temp.
(℃)
Capacity(kW)
COP
DB
RSJ-800/SZN1-H
43
29
60
99.08
4.44
40
29
60
97.95
4.35
35
29
45
94.75
5.06
30
15
45
88.62
5.00
25
15
45
83.64
4.64
55
83.70
4.15
20
15
55
81.05
4.04
15
9
55
75.04
3.84
7
9
40
65.25
4.04
2
9
0
9
-7
9
-15
9
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