Midea RSJ-15/190RDN3-D User manual

MCAC-RTSM-2011-12 Midea Combo Type Heat Pump Water Heater Technical Manual
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Midea Combo Type
Heat Pump Water Heater
Technical Manual
Applicable Model:
RSJ-15/190RDN3-D
RSJ-35/300RDN3-D
Midea reserves the right to discontinue, or change at any time, specifications or designs without notices and
without incurring obligations.

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Contents
Part 1 General Information..................................................3
1. Measurements................................................................................ 4
2. External Appearance ..................................................................... 4
3. Nomenclature................................................................................. 5
4. Features.......................................................................................... 6
Part 2 Combo Units..............................................................7
1. Specifications ............................................................................. 8
2. Operation range........................................................................ 10
3. Performance diagram................................................................11
4. Dimensions............................................................................... 13
5. Service Space ........................................................................... 14
6. Wiring Diagrams....................................................................... 15
7. Piping Diagrams ....................................................................... 17
8. Duct connection ....................................................................... 18
9. Exploded View .......................................................................... 19
Part 3 Installation...............................................................23
1. Precautions .................................................................................. 24
2. Installation information ............................................................... 25
3. Unit Appearance and Composition ............................................ 27
4. Accessories.................................................................................. 29
5. Inspecting and Handling the Unit............................................... 29
6. Electric Wiring.............................................................................. 29
Part 4 Trial Operation ........................................................31
1. Confirmation Before the Trial Operation.................................... 32
2. Operation Instruction .................................................................. 32
3. PCB explanation .......................................................................... 43
4. Maintenance.................................................................................. 45
5. Malfunctions and Resolutions .................................................... 46
6. Malfunction Code and Troubleshooting..................................... 46

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Part 1
General Information
1. Measurements..................................................................4
2. External Appearance .......................................................4
3. Nomenclature...................................................................5
4. Features............................................................................6

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1. Measurements
Model
Dimension
(mm: D x H)
Net weight / Gross weight
(kg)
Power Supply
RSJ-15/190RDN3-D
Φ568×1640
94/110
220~240V-1ph-50Hz
RSJ-35/300RDN3-D
Ф650×1,920
123/150
220~240V-1ph-50Hz
2. External Appearance
RSJ-15/190RDN3-D RSJ-35/300RDN3-D

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3. Nomenclature
Household Water Heating Unit
12 3
-/ - 5
Rated hot water output, unit: 100 W
678
Power supply specification code
Heating mode code
Water tank volume, unit: L
9
Other functions code
10 11 12
-
Water supply pump lift code
Refrigerant code
Design code
Installation type code
Water heating unit code
Export model code
For example:
RSJ-15/190 R D N3 - D
Design code
Refrigerant type (R134a)
Other function (E-heater)
Cycle-heating Type (refrigerant cycle)
Water storage (190L)
Heating Capacity (1500W)
Midea Heat Pump water heater

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4. Features
4.1 Safety
a. Complete isolation between water and electricity. No
electric shock problem, more safety.
b. No fuel tubes and storage, no potential danger from oil
leakage, fire, explosion etc.
c. No cross contamination potential, the condenser coil
wrapped around the stainless steel inner tank
4.2 Max. outlet water Temperature: 70℃.
The system is adopted innovative heating methods: combined the Electric heating and Heat Pump
heating properly, made the water be heated stably and quickly.
4.3 Flexible installation achieved by long air intake/outlet duct with pressure
4.4 Automatic Control:
Automatic start-up and shutdown, automatic defrosting by revising refrigerant cycle. Save you much extra
operation.
4.5 High Efficiency and Energy Saving.
The unit adopts heat pump principle, which absorbs heat from outdoor air and produce heat water, thermal
efficiency can be approximately 3.6 (under the condition A15/12 W15/45)
4.6 All-the-weather Running.
Within the temperature range from -30 to 43℃, it will not be affected by night, cloudy sky,
rain even snow whether.

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Part 2
Combo Units
1. Specifications..............................................................8
2. Operation range.........................................................10
3. Performance diagram ...............................................11
4. Dimensions................................................................13
5. Service Space............................................................14
6. Wiring Diagrams........................................................15
7. Piping Diagrams........................................................17
8. Duct connection........................................................18
9. Exploded View...........................................................19

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1. Specifications
Model
RSJ-15/190RDN3-D
Running mode
Economy
E-heater
Running ambient temp.
℃
-7～43
-30～43
Outlet water Temp.
℃
Default 55℃,38℃～70℃
Power supply
Ph-V-Hz
1-220～240-50
Storage size
L
190
Water heating
Capacity
kW
1.5
3.00
Cop
kW/kW
3.6
1.00
Max. current
A
3.4
13.0
Ambient temp.
℃
-30～43
Unit
Dimension (D×H)
mm
Φ568×1640
Packing (W×H×D)
mm
675×1715×690
Net/gross weight
kg
94/110
Noise level
dB(A)
41
Refrigerant type/quantity
kg
R134a/0.95
Refrigerant design
pressure
MPa
2.6/ 1.2
Tank design pressure
MPa
0.15～1.0
Throttling type
Electronic expansion valve
System protection
TCO1, TCO2, PT valve, automatic defrosting,
over-load protector temp. electric leakage protector
Air flow(with filter screen)
m³/h
218/202/178
Compressor
Model
PJ125G1C-4DZDE
Type
Rotary
Brand
GMCC
Capacity
Btu/h
4740
Input
kW
0.515
Rated current(RLA)
A
2.32
Locked rotor Amp(LRA)
A
15
Thermal protector
125
Capacitor
μF
25
Refrigerant oil
ml
400
Fan motor
Model
YDK12-6A
Brand
welling
Input
w
28
Speed
r/min
900/815/680
Insulation class
B
Safe class
IPX4
Input
W
28
Output
W
9
Rated current
A
0.12
Capacitor
μF
1.2
Indoor coil
Number of rows
3
Tube pitch(a)x row
pitch(b)
mm
21*13.37
Fin spacing
mm
1.5
Fin type (code)
hydrophilic aluminum
Tube outside dia. and type
mm
φ7
internal screw thread
Coil length x height
mm
402.4*294
Number of circuits
3
Water pipeline
Water inlet pipe
mm
DN20
Water outlet pipe
mm
DN20
Drainage pipe
mm
DN20

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PT valve joint
mm
DN20
Max. pressure
MPa
1.2
Design pressure
MPa
0.15～1.0
Heat exchanger
Dividing wall type heat exchanger
E-heater
kW
3.0
Hot water yield
m³/h
0.043
0.086
Loading Quantity
20'/40'/40H
Pcs
24/51/51
Remark:
1. The test conditions: outdoor temp. 15/12℃(DB/WB), inlet water temp. 15℃, outlet water temp.45℃.
2. The specification may be changed for product improvement, please refer to the nameplate.
Model
RSJ-35/300RDN3-D
Running mode
Economy
E-heater
Running ambient temp.
℃
-7～43
-30～43
Outlet water Temp.
℃
Default 55℃,38℃～60℃
Power supply
Ph-V-Hz
1-220～240-50
Storage size
L
300
Water heating
Capacity
kW
3.00
3.00
Cop
kW/kW
3.60
1.00
Max. current
A
6.5
13.0
Ambient temp.
℃
-30～43
Unit
Dimension (D×H)
mm
Ф650×1,920
Packing (W×H×D)
mm
750×2,150×780
Net/gross weight
kg
123/150
Noise level
dB(A)
48
Refrigerant type/quantity
kg
R134a/1.2
Refrigerant design
pressure
MPa
3.0/1.2
Tank design pressure
MPa
1
Throttling type
Electric expansion valve
System protection
TCO1, TCO2, PT valve, automatic defrosting, over-load
protector temp. electric leakage protector etc.
Air flow
m³/h
414/355/312
Compressor
Model
RB233GRDC
Type
Rotary
Brand
Guangzhou Mitsubishi electric
Capacity
Btu/h
9500
Input
kW
0.9
Rated current(RLA)
A
4.1
Locked rotor Amp(LRA)
A
30
Thermal protector
115
Capacitor
μF
30
Crankcase
W
25
Refrigerant oil
ml
440
Fan motor
Model
YDK30-6R
Brand
welling
Input
w
68
Speed
r/min
620/530/465
Insulation class
B

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Safe class
IPX4
Rated current
A
0.3
Capacitor
μF
2.5
Evaporator coil
Number of rows
3
Tube pitch(a)x row
pitch(b)
mm
22×19.05
Fin spacing
mm
1.5
Fin type (code)
hydrophilic aluminum
Tube outside dia. and
type
mm
8
internal screw thread
Coil length x height
mm
482×352
Number of circuits
4
Water pipeline
Water inlet pipe
mm
DN20
Water outlet pipe
mm
DN20
Drainage pipe
mm
DN20
PT valve joint
mm
DN20
Heat exchanger
Dividing wall type heat exchanger
Solar heat exchanger
Water inlet pipe
mm
DN20
Water outlet pipe
mm
DN20
Heat exchanger
Stainless steel SUS316L
Dim.×Length
mm
22×10000
Max. pressure
MPa
0.7
E-heater
kW
3
Hot water yield
m³/h
0.086
Loading Quantity
20'/40'/40H
Pcs
21/47/47
Remark:
1. The test conditions: outdoor temp. 15/12℃(DB/WB), inlet water temp. 15℃, outlet water temp.45℃.
2. The specification may be changed for product improvement, please refer to the nameplate.
2. Operation range
E-heater running ambient temperature range: -30~45℃.
Heat pump running ambient temperature range: -7~43℃.
Water temperature limits:
Ambient temp. T4
Model
T4＜-7
-7≤T4＜-2
-2≤T4＜2
2≤T4＜7
7≤T4＜43
43≤T4
RSJ-15/190RDN3-D
Max temp
(Heat pump)
—
45
60
70
70
—
Max temp
(E-heater)
70
70
70
70
70
70
RSJ-35/300RDN3-D
Max temp
(Heat pump)
—
42
47
55
60
—
Max temp
(E-heater)
60
60
60
60
60
60
Note：Modes will be automatically selected by the unit. manually mode selection is unavailable

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3. Performance diagram
3.1 The relationship between capacity and ambient temperature
Model: RSJ-15/190RDN3-D
Model: RSJ-35/300RDN3-D
1.00
1.50
2.00
2.50
3.00
3.50
4.00
4.50
5.00
-7 -2 2 7 10 15 20 25 30 35 40 43
(kw) 15--45 15--50 15--55 15--60
3.2 The relationship between COP and ambient temperature
Model: RSJ-15/190RDN3-D
Ambient temp(℃)

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Model: RSJ-35/300RDN3-D

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4. Dimensions
Model ：RSJ-15/190RDN3-D
Model ：RSJ-35/300RDN3-D

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5. Service Space

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6. Wiring Diagrams
Model：RSJ-15/190RDN3-D

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Model：RSJ-35/300RDN3-D

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7. Piping Diagrams

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8. Duct connection
A: Air inlet and outlet without duct B: Only air outlet with canvas,A≤5m
It is recommended to install unit by this way in the winter
where there is other heat source in the room.
C:Air inlet and outlet with duct. (A+B≤5m) D: Only air inlet with canvas A≤5m
It is recommended to install unit by this way in summer
that could charge fresh air into room

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9. Exploded View
Model : RSJ-15/190RDN3-D

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No.
Part Name
No.
Part Name
1
Upper back cover
14.18
Inner enamel components
2
Filter
14.19
Tank cover ass'y
3
Ring
15
Front decorative boards
4
Barbed wire
16
Heater cover on
5
Barbed wire
17
Under the heater cover
6
Top cover
18
Temp.sensor ass'y
7
top front sheet
19
Temp.sensor ass'y
8
front volute
20
Temperature control waterproof cover
9
Display cover
21
Electronic expansion valve ass'y
10
Display panel
22
Pressure line cover
11
Motor
23
4-way valve ass'y
12
Centrifugal wind wheel assembly
24
Evaporator ass'y
13
back volute
25
Discharge temp sensor ass'y
14
Foam tank ass'y
26
Junction box cover
14.1
Temperature and pressure safety
valve
27
Room temp sensor ass'y
14.2
Water Outlet pipe
28
Junction box cover
14.3
Electric heating foam baffle
28.1
Wire joint, 3p
14.4
Thermometer
29
Compressor
14.5
Stator of temp. sensor
30
E-part box ass'y
14.6
Temp sensor
30.1
E-part box
14.7
Electric heating pipe water
30.2
Main control board ass'y
14.8
Water Inlet pipe
30.3
Transformer
14.9
Magnesium rod
30.4
Dual Relay
14.10
Supporting plastic tank block
30.5
Relay
14.11
Foam
30.6
Insert motor capacitor
14.12
Drain plug
30.7
Wire joint,2p
14.13
Tank bottom
30.8
Compressor capacitor
14.14
PT valve loop
30.9
Capacitor clamp
14.15
Tank shell
31
Electric control the lid
14.16
Water tank handle
32
Display board ass'y
14.17
Welded pipe temperature