Mitsubishi Electric PUHZ-W50VHA User manual

CONTENTS
1. What is ATW heat pump?.......................................................2
2. Heat pump unit_General information...................................4
3. System design......................................................................15
4. Interface (I/F)........................................................................23
5. Flow temp. controller (FTC).................................................55
6. Requirements........................................................................90
7. System example ...................................................................91
June 2008
Air to Water (ATW) Heat pump,
Interface (I/F) and Flow temp. controller (FTC)
Technical manual

2
Pressure loss (kPa)
0
5
10
15
20
25
30
35
40
45
50
51015202530
Flow rate (L/min)
What is ATW heat pump?1
1-1. Compare with conventional fossil fuel boiler
• Heat pumps produce water at 30°C – 60°C
• Ideal for underfloor heating
• Average underfloor heating circuit 35°C
• Fossil fuel boilers heat water to 80°C
• Flow temp in rads design temp approx 70°C
• Heat pumps can still be used with radiators
• Larger surface area to emit heat from lower temp water
1-2. Points to notice
1-2-1. Design (Radiator sizing)
• Careful consideration must be given to appropriate application of this technology to maximise its benefits – it will not suit all
properties, especially many retrofits
• Heat emitters may need to be larger
• Lower flow temperatures maximise COP
• Various regulations apply to the design and installation of such systems
• Because the flow temp. of heat pump is low compare to fossile fuel boiler, the temperature difference between the primary (flow
water) and secondary (room air) becomes little, it makes the heat emission little.
To emit the same amount of heat energy, it is needed to select the radiator that has a larger surface area.
Be especially careful of the surface area when you design the radiator.
1-2-2. Defrost
Note: Occasionally, vapor that is made by the defrost operation may seem as if smoke come up from the outdoor unit.
1-2-3. Water Pressure loss (for packaged type outdoor unit)
• Water pressure lose of the heat exchangers are as follows.
Be aware of the influence when you design total pipng system.
Hex for PUHZ-W50VHA (ACH30-30Plates) Secondary (Water - side)
Flow rate (L/min) 5 10 15 20 25 30
Pressure Loss (kPa) 1.7 6.0 12.4 20.9 31.4 43.8

33
Pressure loss (kPa)
0.0
5.0
10.0
15.0
20.0
25.0
30.0
51015202530
Flow rate (L/min)
Pressure loss (kPa)
0.0
5.0
10.0
15.0
20.0
25.0
30.0
35.0
40.0
45.0
15 30 45 60 75 90
Flow rate (L/min)
Hex for PUHZ-W85VHA (ACH30-40Plates) Secondary (Water - side)
Flow rate (L/min) 5 10 15 20 25 30
Pressure Loss (kPa) 1.0 3.6 7.5 12.5 18.8 26.2
Hex for PUHZ-W112, 140VHA / YHA (ACH50-50Plates)
Secondary (Water - side)
Flow rate (L/min) 15 30 45 60 75 90
Pressure Loss (kPa) 1.3 4.9 10.9 19.3 29.9 42.8

4
Heat pump unit_General information2
2-1. Line-up
2-1-1. Outdoor unit for Air to water
(1) Packaged type: The Air to Water outdoor unit with a plate HEX (refrigerant-water) inside
Connectable models
Capacity
( HP ) Packaged models ZUBADAN-Packaged models
1-phase 3-phase 1-phase 3-phase
2 PUHZ-W50VHA — — —
3 PUHZ-W85VHA — — —
4 — — — PUHZ-HW112YHA
5 — — PUHZ-HW140VHA PUHZ-HW140YHA
(2) Split type: The standard outdoor unit without a plate HEX (refrigerant-water) inside
Connectable models
Capacity
( HP ) Split Replace inverter models Split ZUBADAN models
1-phase 3-phase 1-phase 3-phase
2.5 PUHZ-RP60VHA3#1 — — —
3 PUHZ-RP71VHA3#1 — PUHZ-HRP71VHA(2) —
4 PUHZ-RP100VHA3#1 PUHZ-RP100YHA3#1 PUHZ-HRP100VHA(2) PUHZ-HRP100YHA(2)
5 PUHZ-RP125VHA2#2 PUHZ-RP125YHA2#2 — PUHZ-HRP125YHA(2)
6 PUHZ-RP140VHA2#2 PUHZ-RP140YHA2#2 — —
* Outdoor units (PUHZ-RP or PUHZ-P) other than the above-mentioned become possible by connecting TH5 ( 2-phase refrig-
erant temp. thermistor ) with the interface only for Air to Air use.
2-1-2. Air to Air application
INTER FACE MODEL NAME PAC-IF011B-E / PAC-IF010-E
AUTO
STEP *1 OUTDOOR UNIT 35 50 60 71 100 125 140 200 250
PUHZ-HRP — — — VHA(2) V/YHA(2) YHA(2) — — —
PUHZ-RP VHA3 VHA3 VHA3 VHA3 V/YHA3 V/YHA2 V/YHA2 YHA2 YHA2
PUHZ-P — — — — VHA2 VHA2 VHA2 YHA YHA
SUZ-KA VA VA VA VA — — — — —
PUH-P — — — V/YHA V/YHA YHA YHA MYA MYA
MANUAL
STEP *2 OUTDOOR UNIT 35 50 60 71 100 125 140 200 250
PUHZ-HRP — — — VHA V(Y)HA YHA — — —
PUHZ-RP VHA3 VHA3 VHA3 VHA3 V/YHA3 V/YHA2 V/YHA2 YHA2 YHA2
MANUAL STEP MODE is New function of INTER FACE (Fixed capacity = Compressor frequency (Hz) fixed mode) .
2 Phase (Gas/Liquid) pipe thermistor is required (TH5).
Also, Interface P.C.B. SW2-6 need to be set "OFF (No LEV self control mode)" .
<Old models : The models that are not described in the table above.>
*1: With(Auto-mode)+(SW2-6 is OFF)+(2phase thermistor), all A-control outdoor units are able to connect to PAC-IF010/
011B-E only for Air to Air use.
*2: With(Manual-mode)+(SW2-6 is OFF)+(2phase thermistor), from following RP type outdoor units are able to connect to
PAC-IF010/011B-E only for Air to Air use.
PUHZ-RP35V, 50V, 60V, 71V,100V/Y,125V/Y,140V/YHA2¹
PUHZ-RP200Y, 250YHA²

55
2-1-3. Reference manual
Outdoor unit Service
manual Parts catalog
PUHZ-W50VHA
OCH439 OCB439
PUHZ-W85VHA
PUHZ-HW112YHA
PUHZ-HW140VHA
PUHZ-HW140YHA
PUHZ-RP60VHA3#1
PUHZ-RP71VHA3#1
PUHZ-RP100VHA3#1
PUHZ-RP125VHA2#2
OC374 OC374
PUHZ-RP140VHA2#2
PUHZ-RP100YHA3#1
PUHZ-RP125YHA2#2
PUHZ-RP140YHA2#2
PUHZ-HRP71VHA(2)
OCH425 OCB425
PUHZ-HRP100VHA(2)
PUHZ-HRP100YHA(2)
PUHZ-HRP125YHA(2)
Type Model name Parts catalog
I/F cased PAC-IF011B-E OCB427
PCB only PAC-IF010-E —
FTC cased PAC-IF021B-E OCB427
PCB only PAC-IF020-E —
2-2. Data
2-2-1. Packaged type
Refer to each model's service manual.
2-2-2. Split
[1]Specifications(Reference data(connect to plate heat exchanger))
Rating conditions
Nominal operating condition
Heating (A2/W35)
Outside air temperature (Dry-bulb) +2:
Outside air temperature (Wet-bulb) +1:
Water temperature (inlet/outlet) +30/+35:
Heating (A7/W35)
Outside air temperature (Dry-bulb) +7:
Outside air temperature (Wet-bulb) +6:
Water temperature (inlet/outlet) +30/+35:
Heating (A7/W45)
Outside air temperature (Dry-bulb) +7:
Outside air temperature (Wet-bulb) +6:
Water temperature (inlet/outlet) +40/+45:

6
Plate heat exchanger
ALFA LAVAL
ACH50
Maximum outlet water temperature
The performance might be decreased by the refrigerant
pipng length, insulation of refrigerant pipng and
heat exchanger (Water HEX).
w
H
D
Water IN
Ref.OUT
(Heating)
Ref.IN
(Heating)
Water OUT
B
A
Ambient temperature [ °C ]
-25 -20
65
60
55
50
45
40 -15 -10 -5 0 5 10
Maximum outlet water temptemperature [°C
]
A: 50 mm
B: 466 mm
W: 112 mm
H: 526 mm
D: 130 mm
50 plates
Refrigerant pipng length from outdoor unit to
heat exchanger (Water HEX): 5m
(1) PUHZ-HRP • V/YHA2
Outdoor unit
Model name PUHZ-HRP71VHA2
Power supply
(Phase, Voltage, Frequency) 1[, 230V, 50Hz
Breaker size A 32
Nominal water flow L/min 22.9
Heating
(A2/W35) Capacity kW 8.00
COP 3.24
Power input 2.47
Heating
(A7/W35) Capacity kW 8.00
COP 4.40
Power input 1.82
Heating
(A7/W45) Capacity kW 8.00
COP 3.24
Power input 2.47
Outdoor unit
Model name PUHZ-HRP100VHA2 /
PUHZ-HRP100YHA2
Power supply
(Phase, Voltage, Frequency) 1[, 230V, 50Hz / 3[, 400V, 50Hz
Breaker size A 40 / 16
Nominal water flow L/min 32.1
Heating
(A2/W35) Capacity kW 11.20
COP 3.02
Power input 3.71
Heating
(A7/W35) Capacity kW 11.20
COP 4.26
Power input 2.63
Heating
(A7/W45) Capacity kW 11.20
COP 3.24
Power input 3.46
Heating
(A7/W55) Capacity kW 11.20
COP 2.40
Power input 4.67
Outdoor unit
Model name PUHZ-HRP125YHA2
Power supply
(Phase, Voltage, Frequency) 3[, 400V, 50Hz
Breaker size A 16
Nominal water flow L/min 40.1
Heating
(A2/W35) Capacity kW 14.00
COP 2.70
Power input 5.19
Heating
(A7/W35) Capacity kW 14.00
COP 4.22
Power input 3.32
Heating
(A7/W45) Capacity kW 14.00
COP 3.20
Power input 4.38
Guaranteed operating range (Outdoor)
Heating :-25 ~ +35
Cooling :-5 ~ +46

7
(2) PUHZ-RP • VHA3/YHA3(2)
Outdoor unit
Model name PUHZ-RP60VHA3#1
Power supply
(Phase, Voltage, Frequency) 1[, 230V, 50Hz
Breaker size A 25
Nominal water flow L/min 20.1
Heating
(A2/W35)
Capacity kW 6.80
COP 2.94
Power input kW 2.31
Heating
(A7/W35)
Capacity kW 7.00
COP 4.29
Power input kW 1.63
Heating
(A7/W45)
Capacity kW 7.00
COP 3.27
Power input kW 2.14
Outdoor unit
Model name PUHZ-RP71VHA3#1
Power supply
(Phase, Voltage, Frequency) 1[, 230V, 50Hz
Breaker size A 25
Nominal water flow L/min 22.9
Heating
(A2/W35)
Capacity kW 7.50
COP 2.92
Power input kW 2.57
Heating
(A7/W35)
Capacity kW 8.00
COP 4.21
Power input kW 1.90
Heating
(A7/W45)
Capacity kW 8.00
COP 3.20
Power input kW 2.50
Guaranteed operating range (Outdoor)
Heating :-11 ~ +35
Cooling :-5 ~ +46
Plate heat exchanger
ALFA LAVAL
ACH50
Maximum outlet water temperature
The performance might be decreased by the refrigerant
pipng length, insulation of refrigerant pipng and
heat exchanger (Water HEX).
w
H
D
Water IN
Ref.OUT
(Heating)
Ref.IN
(Heating)
Water OUT
B
A
Ambient temperature [ °C ]
65
60
55
50
45 -10 -5 0 5 10
Maximum outlet water temptemperature [°C
]
A: 50 mm
B: 466 mm
W:112 mm
H: 526 mm
D: 82 mm
30 plates
Refrigerant pipng length from outdoor unit to
heat exchanger (Water HEX): 5m

8
Outdoor unit
Model name PUHZ-RP100VHA3#1 /
PUHZ-RP100YHA3#1
Power supply
(Phase, Voltage, Frequency) 1[, 230V, 50Hz / 3[, 400V, 50Hz
Breaker size A 32 / 16
Nominal water flow L/min 32.1
Heating
(A2/W35)
Capacity kW 10.50
COP 2.90
Power input kW 3.62
Heating
(A7/W35)
Capacity kW 11.20
COP 4.21
Power input kW 2.66
Heating
(A7/W45)
Capacity kW 11.20
COP 3.20
Power input kW 3.50
Outdoor unit
Model name PUHZ-RP125VHA2#2 /
PUHZ-RP125YHA2#2
Power supply
(Phase, Voltage, Frequency) 1[, 230V, 50Hz / 3[, 400V, 50Hz
Breaker size A 32/16
Nominal water flow L/min 40.1
Heating
(A2/W35)
Capacity kW 11.50
COP 2.70
Power input kW 4.26
Heating
(A7/W35)
Capacity kW 14.00
COP 4.15
Power input kW 3.37
Heating
(A7/W45)
Capacity kW 14.00
COP 3.10
Power input kW 4.51
Outdoor unit
Model name PUHZ-RP140VHA2#2 /
PUHZ-RP140YHA2#2
Power supply
(Phase, Voltage, Frequency) 1[, 230V, 50Hz / 3[, 400V, 50Hz
Breaker size A 40/16
Nominal water flow L/min 45.9
Heating
(A2/W35)
Capacity kW 11.70
COP 2.69
Power input kW 4.35
Heating
(A7/W35)
Capacity kW 16.00
COP 3.90
Power input kW 4.10
Heating
(A7/W45)
Capacity kW 16.00
COP 3.00
Power input kW 5.34
Guaranteed operating range (Outdoor)
Heating :-20 ~ +35
Cooling :-5 ~ +46
Plate heat exchanger
ALFA LAVAL
ACH50
Maximum outlet water temperature
The performance might be decreased by the refrigerant
pipng length, insulation of refrigerant pipng and
heat exchanger (Water HEX).
w
H
D
Water IN
Ref.OUT
(Heating)
Ref.IN
(Heating)
Water OUT
B
A
Ambient temperature [ °C ]
-20 -15
65
60
55
50
45
40 -10 -5 0 5 10
Maximum outlet water temptemperature [°C
]
A: 50 mm
B: 466 mm
W:112 mm
H: 526 mm
D: 130 mm
50 plates
Refrigerant pipng length from outdoor unit to
heat exchanger (Water HEX): 5m

9
[2]Standard operation data <Split> Reference data (connect to Plate HEX)
(1) PUHZ-HRP • V/YHA2 ACH50-50 plates
Mode Cooling
(A35/W7) Heating (A7/W35) Cooling (A35/W7) Heating (A7/W35) Cooling (A35/W7) Heating (A7/W35)
Total
Capacity W 7,100 8,000 10,000 11,200 12,500 14,000
Input kW 2.20 1.82 3.67 2.61 4.80 3.50
Electrical circuit
Outdoor unit PUHZ-HRP71VHA2 PUHZ-HRP100VHA2/
PUHZ-HRP100YHA2 PUHZ-HRP125YHA2
Phase, Hz 1, 50 1/3, 50 3, 50
Voltage V 230 230 / 400 400
Current A 9.9 8.2 16.5/5.6 11.7/4.0 7.3 5.3
Refrigerant circuit
Discharge pressure MPa 2.4 2.0 2.6 2.1 2.8 2.3
Suction pressure MPa 0.8 0.7 0.8 0.7 0.8 0.7
Discharge temperature :70 60 78 63 84 70
Condensing temperature :42 35 46 36 47 39
Suction temperature :126114103
Evaporating temperature :525251
Evaporator inlet temperature :5—5—5—
Evaporator outlet temperature :5—5—5—
Condenser inlet temperature :—55—60—65
Condenser outlet temperature :—33—31—30
Water
conditions
Flow volume L/min 20.4 22.9 28.7 34.4 35.8 40.1
Outlet water temperature :735735735
Outdoor
conditions
Intake air temperature D.B. :357357357
W.B. :246246246
The unit of pressure has been changed to MPa based on international SI system.
The conversion factor is : 1(MPa)=10.2(kgf/F)

10
(2) PUHZ-RP • VHA3/YHA3(2) ACH50-30 plates ACH50-50 plates
Mode Cooling
(A35/W7) Heating (A7/W35) Cooling (A35/W7) Heating (A7/W35) Cooling (A35/W7) Heating (A7/W35)
Total
Capacity W 6,000 7,000 6,600 8,000 9,100 11,200
Input kW 2.31 1.63 2.59 1.90 3.31 2.66
Electrical circuit
Outdoor unit PUHZ-RP60VHA3#1 PUHZ-RP71VHA3#1 PUHZ-RP100VHA3#1/
PUHZ-RP100YHA3#1
Phase, Hz 1, 50 1, 50 1/3, 50
Voltage V 230 230 230 / 400
Current A 10.3 7.2 11.4 8.4 14.5 / 5.1 11.8 / 4.1
Refrigerant circuit
Discharge pressure MPa 2.7 2.1 2.7 2.2 2.6 2.1
Suction pressure MPa 0.8 0.7 0.8 0.7 0.8 0.7
Discharge temperature :70 65 70 66 74 65
Condensing temperature :45 36 45 36 44 36
Suction temperature :454265
Evaporating temperature :515151
Evaporator inlet temperature :6—6—5—
Evaporator outlet temperature :5—5—5—
Condenser inlet temperature :—56—57—58
Condenser outlet temperature :—34—33—35
Water
conditions
Flow volume L/min 17.2 20.1 18.9 22.9 26.1 32.1
Outlet water temperature :735735735
Outdoor
conditions
Intake air temperature D.B. :357357357
W.B. :246246246
The unit of pressure has been changed to MPa based on international SI system.
The conversion factor is : 1(MPa)=10.2(kgf/F)

11
ACH50-50 plates
Mode Cooling
(A35/W7) Heating (A7/W35) Cooling (A35/W7) Heating (A7/W35)
Total
Capacity W 12,000 14,000 12,500 16,000
Input kW 5.10 3.37 5.38 4.10
Electrical
circuit
Outdoor unit PUHZ-RP125VHA2#2/
PUHZ-RP125YHA2#2 PUHZ-RP140VHA2#2/ PUHZ-RP140YHA2#2
Phase, Hz 1 / 3, 50 1 / 3, 50
Voltage V 230 / 400 230 / 400
Current A 22.4 / 7.6 15.0 / 5.2 23.6 / 8.1 18.2 / 6.2
Refrigerant circuit
Discharge pressure MPa 2.8 2.1 2.8 2.2
Suction pressure MPa 0.7 0.7 0.7 0.7
Discharge temperature :80 69 81 67
Condensing temperature :46 36 46 36
Suction temperature :3431
Evaporating temperature :5-15-1
Evaporator inlet temperature :6—6—
Evaporator outlet temperature :5—5—
Condenser inlet temperature :—63—61
Condenser outlet temperature :—35—34
Water
conditions
Flow volume L/min 34.4 40.1 35.8 45.9
Outlet water temperature :735735
Outdoor
conditions
Intake air temperature D.B. :357357
W.B. :246246
The unit of pressure has been changed to MPa based on international SI system.
The conversion factor is : 1(MPa)=10.2(kgf/F)

12
[4]Capacity correction curves (Refrigerant pipng length)
Cooling and heating capacity is lowered according to pipe length. Capacity can be obtained by referring to the capacity curves
below.
Cooling
Heating
100
95
90
85
80
75
70 5 101520253035404550556065707580
Note: The permitted pipe length is up to 55m for RP 60, 71 model.
The permitted pipe length is up to 80m for HRP71 and 100~ 140 model.
Cooling 60 models
Cooling 100 model
Cooling 71 model
Heating
Cooling 125 model
Cooling 140 model
Capacity ratio [%]
Corrected pipe length [m]
[5]Refrigerant circuit diagram (Representative pattern)
PUHZ-HRP • V/YHA2 + Plate HEX (ACH50) + FTC (TH1/2)
Distributor
Thermistor TH7
(Outdoor)
Heat exchanger
Refrigerant
GAS pipe
connection
(5/8 inch)
Refrigerant
LIQUID pipe
connection
(3/8 inch)
Stop valve
(with service port)
Strainer
#100
Power
receiver
Linear
expansion valve B
Linear
expansion valve C
Linear expansion valve A
Strainer
#100
Replace
filter
Strainer
#100
Strainer
#100
Thermistor
TH6
(Outdoor
2-phase pipe)
Thermistor TH3
(Outdoor pipe)
Charge plug
(Low pressure)
Charge plug
(High pressure)
Heat interchange circuit
Bypass
valve
Thermistor TH4
(Discharge)
Compressor Injection port
Strainer
#50
Solenoid valve
(Four-way valve)
Strainer
#100
Strainer
#100
Muffler
P-sensor
Ball valve
Restrictor
valve
Thermistor TH33
(Outdoor pipe)
Thermistor
TH32
(Outdoor pipe)
Low pressure
switch 63L
High pressure
switch 63H
Refrigerant flow in cooling
Refrigerant flow in heating
Thermistor TH2
(Liquid pipe)
Thermistor TH1
(Outlet water)
Plate HEX
Water IN
Water OUT

13
[6]Notification to design/select HEX (Refrigerant - Water) Warranty for SPILIT solution
• Specifications of AHU and compatibility with regulations must be confirmed by your company.
• Selection of an apporopriate AHU (with appropriate specifications to match those of units
connected to the AHU such as configuration, dimension, life-span, vibration, noise level,
or features) must be made by your company.
• Mitsubishi Electric shall not be liable for any damage to the entire system or the AHU main
body caused by connected AHU with wrong specification or wrong usage of AHU.
• Mitsubishi Electric shall not be liable for any damage to the outdoor units caused by AHU damage.
( AHU : hydro box or refrigerant - water HEX )
Heat exchanger
(1) Withstanding pressure
Designed pressure of outdoor unit is 4.15 MPa. Following must be satisfied for burst pressure of connecting application.
Burst pressure : More than 12.45 MPa (3 times more than designed pressure)
(2) Performance
Secure the heat exchanger capacity which meets the following conditions. If the conditions are not met, it may result in
malfunction caused by the protection operation or the outdoor unit may be turned off due to the operation of protection
system.
1. Evaporate temperature is more than 4: in max. frequency operation under *1 the cooling rated conditions.
2. In case of hot water supply, condense temperature is less than 58:in max. frequency operation with the outside tem-
perature 7:D.B./6:W.B.
*1. Outdoor: 35:D.B./24:W.B.
(3) Heat exchanger internal capacity
Heat exchanger internal capacity must be within the capacity range shown below. If the heat exchanger below the mini-
mum capacity is connected, it may result in the back flow of liquid or the failure of the compressor.
If the heat exchanger above the maximum capacity is connected, it may result in the deficiency in performance due to lack
of refrigerant or overheating of the compressor.
Minimum capacity : 10 хModel capacity [J] / Maximum capacity : 30 хModel capacity [J]
e.g. When connecting to PUHZ-HRP100 VHA2
Minimum capacity : 10 х100 =1000 J
Maximum capacity : 30 х100 =3000 J
Model capacity 60(2.5HP) 71(3HP) 100(4HP) 125(5HP) 140(6HP)
Maximum capacity [J] 1800 2130 3000 3750 4200
Minimum capacity [J] 600 710 1000 1250 1400
(4) Contamination maintenance
1. Wash the inside of heat exchanger to keep it clean. Be sure to rince not to leave flux. Do not use chlorine detergent for
wash.
2. Be sure that the amount of contamination per unit cubic content of heat transfer pipe is less than the following amount.
Example) In case of [9.52mm
Residual water : 0.6M/C, Residual oil : 0.5M/C, Solid foreign object : 1.8M/C
Note:
• Install the hydraulic filter at the water intake.
• Use the inlet water of higher than 5 ˚C and lower than 55 ˚C.
• The water in a system should be clean and with pH value of 6.5-8.0.
• The followings are the maximum values;
Calcium : 100mg/L
Chlorine : 100mg/L
Iron/manganese : 0.5mg/L
• Refrigerant pipe diameter from outdoor unit to refrigerant-water HEX (Only for SPLIT type)
Use the pipe with same diameter size as the refrigerant pipe connection diameter of outdoor unit.(Refer to outdoor
unit installation manual.)
• Make sure to perform the frozen prevention measure for water pipe system.(Water piping insulation, back-up pump
system, using of a certain % ethylene glycol instead of normal water)
[Reference]
TB142 has for “Forced Comp. OFF” function as the EXTERNAL INPUT(Contact signal).
To input the abnormal signal of water pump or the abnormal lowering of water flow amount with non-voltage contact
signal makes the outdoor unit stop forcibly. For details, refer to each part of I/F or FTC on this manual.

14
• The water velocity in pipes should be kept within certain limits of material to avoid erosion,corrosion and excessive
noise generation.
Be aware, and take care of , that local velocities in small pipes, bends and similar obstructions can exceed the values
of previous page.
e.g.) Copper : 1.5m/s
Warning
• Use clean enough water which meets water quality standards. The deterioration of water quality may result in the sys-
tem breakdown or the water leakage.
• Never use anything other than water as a medium. It may cause a fire or an explosion.
• Do not use heated or cooled water that is produced by the air to water heat pump directly for drinking or cooking.
There is a risk to damage your health. There is also a risk that installing the water heat exchanger may corrode if the
necessary water quality for air to water heat pump system cannot be maintained. If you wish to use the heated or
cooled water from the heated pump for these purposes, take measure such as to the second heat exchanger within
the water piping system.
Reference data
Required specification and performance of Plate Heat Exchanger.
Required specification
Refrigerant side Refrigerant type R410A Normal (designed) pressure 4.15MPa
Operating temperature -20~100:
Water side Refrigerant type Clean water Normal (designed) pressure 1.5MPa
Operating temperature -20~90:(No freezing)
Burst pressure 12.45MPa (4.15MPa ×3) or more
Frozen performance Satisfy an initial performance since 5 times or more of deep freezing.
Heat cycle 70,000 times or more…Temperature difference: about 50K
Endurance pressure 72,000 times or more…Pressure difference: 3.3MPa (0 ↔3.3MPa)
Required performance
< For 2.5~3 HP >
Required performance of Plate Heat Exchanger kW 9.0 9.0
Refrigerant side
(R410A)
Inlet temperature degC 75 100 Gas pipe: [12.7mm
Condensing temperature degC 39.5 63.5 Liquid pipe: [9.52mm
Subcool degC 2 2
Max. pressure loss kPa 50 50
Water side
Inlet temperature degC 30 55 Inlet / outlet pipe: [28.6mm
Outlet temperature degC 35 60
Water flow volume L/min 25.8 25.8
Max. pressure loss kPa 50 50
* For heating mode, used at counter flow direction between refrigerant flow and water one.
< For 4~6 HP >
Required performance of Plate Heat Exchanger kW 14.0 14.0
Refrigerant side
(R410A)
Inlet temperature degC 75 100 Gas pipe: [15.88mm
Condensing temperature degC 39.5 63.5 Liquid pipe: [9.52mm
Subcool degC 2 2
Max. pressure loss kPa 50 50
Water side
Inlet temperature degC 30 55 Inlet / outlet pipe: over [28.6mm
Outlet temperature degC 35 60
Water flow volume L/min 40.1 40.1
Max. pressure loss kPa 50 50
* For heating mode, used at counter flow direction between refrigerant flow and water one.

1515
System design3
3-1. System type
* with step I/F by digital/analog signals
* with FTC simple/basic/analog temp.
Application Capacity control For Model name Type
Air to Air Local controller Manufacturer PAC-IF010-E *
STEP I/F
PCB only
Individual installer PAC-IF011B-E Cased
I/F Manufacturer PAC-IF010-E * PCB only
Individual installer PAC-IF011B-E Cased
Air to Water Local controller Manufacturer PAC-IF010-E * PCB only
Individual installer PAC-IF011B-E Cased
FTC Manufacturer PAC-IF020-E * FTC PCB only
Individual installer PAC-IF021B-E Cased with R/C
* PAC-IF010-E, PAC-IF020-E : PCB 10pcs/set
3-2. Combination of remote controller
Remote controller model Connected object Connectability
PAR-21MAA (Standard) I/F OK
FTC NG (Continue to indicate “PLEASE WAIT”)
PAR-W21MAA (Only for FTC) I/F NG (Continue to indicate “PLEASE WAIT”)
FTC OK
PAR-20MAA (Standard) I/F NG (Continue to indicate “PLEASE WAIT”)
(Old ) FTC NG (Continue to indicate “PLEASE WAIT”)
3-3. Flow chart to check system type
ATW
application
Variable capacity
request signals for
Heat Pump is
calculated...
By local
controller
(your side)
Your system is
ANALOG STEP
SYSTEM
(IF)
capacity
signals
protocol is... Analog
(0-10v/4-20mA…)
digital step
(non-voltage contact)
start
By our FTC
IF
Your system is
DIGITAL STEP
SYSTEM
(IF)
IF PCB System controller
(locally supplied)
Remote
DIGITAL STEP
SYSTEM
ANALOG STEP
SYSTEM
ON/OF
Operation
mode
-Heating
-Cooling
By Non-voltage
Contact signals IF PCB System
controller
(locally supplied)
Remote
ON/OF
Operation
mode
-Heating
-Cooling
By Non-voltage
Contact signals
Capacity
steps
By Analog signal
4-20mA / 1-5V / 0-10V
End user interface End user interface
for maintenance
- to check error code For maintenance purpose - analog signal parameters
Capacity
steps
By Non-voltage
Contact signals
Continued to next page.

16
+In this system,
• Heating ECO mode of FTC is
not available.
• It is NOT necessary to switch
operation mode to realize
Hot water mode, Anti freeze
mode and Heating ECO mode.
Simply change the target temp.
by Analog signal.
‘Target flow temperature’ is set…
By remote controller
By remote controller Your system is
BASIC SYSTEM.
Your system is
SIMPLE SYSTEM.
Your system is ANALOG TEMP. SYSTEM.
Remote controller
FTC PCB BOX FTC PCB BOX FTC PCB BOX
Remote controller
System controller
(locally supplied)
SIMPLE SYSTEM BASIC SYSTEM ANALOG TEMP. SYSTEM
ON/OFF
Operation mode
Operation mode
- Heating
- Heating ECO
- Hot water
- Anti freeze
- Cooling
Operation mode
- Heating +
- Cooling
Target flow temp.
Target flow temp.
Target flow temp.
ON/OFF
Remote controller
ON/OFF
By Non-voltage
Contact signals
By Non-voltage
Contact signals
End user interface
End user interface
System controller
(locally supplied)
End user interface
To preset
- target temp. for each mode
- target temp. parameters
To preset
- analog signal parameters
Analog signal
4-20mA/1-5V/0-10V
Heat Pump switch ON/OFF
and the operation mode
change is done…
By external signals from local controller
(non-voltage contact signals)
By external signals from local controller
(Analog signal:4-20mA/ 1-5V/ 0-10V)
(FTC)
(FTC)
(FTC)
By our FTC
FTC

17
Variable capacity
request signals for
Heat Pump is
calculated...
By local
controller
(your side)
capacity
signals
protocol is...
Analog
(0-10v/4-20mA…)
digital step
(non-voltage contact)
By our IF
IF
PCB System
controller
(locally
suppliied)
Remote
controller
IF PCB
Remote controller
AUTO STEP SYSTEM DIGITAL STEP SYSTEM ANALOG STEP SYSTEM
ON/OFF
Operation mode
Target retern air temp.
ON/OF
Operation
mode
-Heating
-Cooling
By Non-voltage
Contact signals
IF
PCB
ON/OF
Operation
mode
-Heating
-Cooling
By Non-voltage
Contact signals
Capacity
steps
By Analog
signal
4-20mA / 1-5V / 0-10V
End user interface
End user
interface
for
maintenance
- to check
error code
For
maintenance
purpose
- analog signal
Capacity
steps
By Non-voltage
Contact signals
Remote
controller
System
controller
(locally
suppliied)
End user
interface
ATA
application
start
IF
Your system is
DIGITAL STEP
SYSTEM
(IF)
Your system is
AUTO STEP
SYSTEM
(IF)
Your system is
ANALOG STEP
SYSTEM
(IF)

18
6 5 2 11
8
1 2
1 8
1 8
4 3
TH1
OFF/ONOFF/ON
OFF/ON
OFF/ON
TB61
TH2
6 5 2 1 4 3+
TB62
Adjustable resistor
4-20mA/1-5V/0-10V
Wired Remote Controller
(For Maintenance)
6
5
2
14
38
7
10
9
11
13
12
14
6
5
2
14
38
7
10
9
11 13
12 14
TB142 TB141
(External Output)
(External Input)
L N
S1 S2 S3
L N
S1 S2 S3
TB6
DC311~ 339V
FUSE
SW6
LED1
RECTIFICATION
LED2
LED3
LED4
LED5
CNS2 (RED)
Interface controller
TO OUTDOOR UNIT
U
UDSA
21
SYMBOL INTERFACE CONTROLLER
TB6 TB141 TB142 TB62 TB61 LED1 LED2~5 FUSE SW1 SW2 SW3 SW6 ZNR01,02 DSA X1
~
X6
TH1 TH2 TH5
NAME
TERMINAL BLOCK(INTERFACE/OUTDOOR CONNECTING LINE) TERMINAL BLOCK (External Output) TERMINAL BLOCK (External Input REMOTE SWITCH) TERMINAL BLOCK (External Input) THERMISTOR(TARGET, PIPE) POWER SUPPLY(I/F) OPERATION INDICATION FUSE(T3.15AL250V) SWITCH(Input selection of inverter capacity setting) *See table 4. SWITCH(Function switch)*See table 5 and 6. SWITCH(LED2~5 Display setting) SWITCH(4-20mA/1-5V/0-10V switch)*See table 4. VARISTOR SURGE ABSORBER RELAY TARGET TEMP. THERMISTOR (0/15k, 25/5.2kDETECT)
PIPE TEMP. THERMISTOR/LIQUID (0/15k, 25/5.2kDETECT) PIPE TEMP. THERMISTOR/2-PHASE (0/15k, 25/5.2kDETECT)
TB6
TO OUTDOOR UNIT POWER SUPPLY ~/N
21354678 TB141
11
10
912 13 14
ZNR01
ZNR02
21354678
TB142
I/F 9
X1 X2 X3 X4 X5 X6
Item Operation Output Error Output Comp. Output Defrost Output Mode(Cool) Output Mode(Heat) Output
(OUT1) (OUT2) (OUT3) (OUT4) (OUT5) (OUT6) (OUT7)
X1 X2 X3 X4 X5 X6
ON Error ON ON ON ON
OFF Normal OFF(Comp. OFF) OFF OFF OFF
(Comp. ON) (Defrosting) (Cooling) (Heating)
TB141 1-2 3-4 5-6 7-8 9-10 11-12 13-14
Refer to table 1.
table 1
*1(Fig.1)
Refer to table 2, 3.
Remark SW2-1, SW2-2: ON is valid.
ON Forced Comp. OFF Heating
OFF Normal Cooling
Item Forced Comp. OFF Fixed operation mode
TB142 1-2 (IN1) 3-4 (IN2)
table 2
Step for capacity setting
TB142 10-11 (COM-IN5)
TB142 10-12 (COM-IN6)
TB142 10-13 (COM-IN7)
TB142 10-14 (COM-IN8) Remark
Auto mode
OFF
Fixed capacity
(Hz fixed)
mode
table 3
TB142 I/F
11 10 12 13 14
11 10 12 13 14
At site
4bit8 switch
OFF~AUTO
TB142 I/F
At site
Step1 Step4 Step7 AUTO
SW1-1 OFF ON ON ON OFF ON OFF
SW2-3 OFF ON OFF ON OFF ON OFF ON
OFF ON OFF ON OFF ON OFF ON OFF
OFF OFF ON ON OFF OFF ON ON OFF
OFF OFF OFF OFF ON ON ON ON OFF
OFF OFF OFF OFF OFF OFF OFF OFF ON
OFF 0% Step1 10% Step2 20% Step3 30% Step4 50% Step5 70% Step6 80% Step7 100% Auto
OFF 0% Step1 10% Step4 50% Step7 100% Auto
[OFF] [ON] [OFF]
[ON]
SW2-4 OFF OFF ON ON OFF OFF ON ON
SW2-5 OFF OFF OFF OFF ON ON ON ON
Details Not fixed (Remote controller setting) Cooling 19 ˚C/Heating 17 ˚C FIX 20 ˚C FIX 22 ˚C FIX 24 ˚C FIX 26 ˚C FIX 28 ˚C FIX Cooling 30 ˚C / Heating 28 ˚C FIX
SW1-2 OFF OFF ON ON OFF OFF ON
SW2-1 OFF ON OFF ON
SW2-2 OFF OFF ON ON
SW1-3 OFF OFF OFF OFF ON ON ON
SW6-1 OFF OFF ON OFF OFF OFF OFF
SW6-2 OFF OFF ON ON OFF OFF OFF
Input TypeA
(4bit-8 setting)
TypeB
(1bit-1 setting)
4-20mA 1-5V 0-10V 0-10k No input(Auto mode)
Step for capacity setting OFF/Step 1/Step 2/.../Step 7/Auto OFF/Step 1/Step 4/Step 7/Auto OFF/Step 1/Step 2/.../Step 7 OFF/Step 1/Step 2/.../Step 7 OFF/Step 1/Step 2/.../Step 7 OFF/Step 1/Step 2/.../Step 7/Auto Only Auto mode
table 4 SW1, SW6 : Input selection of inverter capacity setting table 5 SW2-1/2-2 : Fixed operation mode
Details
Not FIX
(Depending on Remote controller setting)
[Cooling]FIX [Heating]FIX External input(Depending on TB142-3,4)
1. SymboIs used in wiring diagram are, : Connector, : Terminal block. 2. Interface controller and outdoor connecting wires have poIarities, make sure to match
terminal numbers(S1, S2, S3) for correct wirings.
3. Since the outdoor side electric wiring may change, be sure to check the outdoor unit
electric wiring diagram for servicing.
4. This diagram shows the wiring of Interface controller and outdoor connecting wires.(specification of 230V),
adopting superimposed system of power and signal.
*1 : When work to supply power separately to Interface controller and outdoor units was applied, refer to Fig 1.
*2 : Remove the short-circuited connector CNS2 when work to supply power separately to
Interface controller and outdoor units was applied.
ONOFF
TypeA TypeB
At site
*2 Remove the
short-circuited connector CNS2.
table 6 SW2-3/2-4/2-5 : Fixed set temperature [For Auto mode]
t° t°
SW3SW2SW1
1110
12
13
14
{ {
{
{
SW2-6 OFF ON
table 7 SW2-6 : setting TH5
Details
Connect TH5 Not connect TH5 (Initial setting)
TH5 t°
( ( (
3-4. Wiring diagram
(1) PAC-IF011B-E(I/F)

19
6 5 2 1
1 8
1 2
1 8
1 8
4 3
TH1
OFF/ONOFF/ON
OFF/ON
OFF/ON
TB61
*6TH2
6 5 2 1 4 3+
TB62
4-20mA/1-5V/0-10V
WiredRemoteController
6
5
2
1
4
3
8
7
10
9
11
13
12
14
6
5
2
1
4
3
8
7
10 
9
1113
12 14
TB142 TB141

(ExternalOutput)
(ExternalInput)
LN
S1 S2 S3
LN
S1 S2 S3
TB6
DC311〜 339V
FUSE
SW6
LED1
RECTIFICATION
LED2
LED3
LED4
LED5
CNS2 (RED)
FLOWTEMP.CONTROLLER(FTC)
TOOUTDOORUNIT
U
U
DSA
21
SYMBOL FLOWTEMP.CONTROLLER(FTC)
TB6 TB141 TB142 TB62 TB61 LED1 LED2 LED3 LED4,5 FUSE SW1 SW2 SW3 SW6 ZNR01,02 DSA X1〜X7
TH1 TH2
NAME
TERMINALBLOCK(FTC/OUTDOORUNITCONNECTINGLINE) TERMINALBLOCK(ExternalOutput) TERMINALBLOCK(ExternalInputContactsignal) TERMINALBLOCK(ExternalInputAnalogsignal) TERMINALBLOCK(Thermistor) POWERSUPPLY(FTC) POWERSUPPLY(WIREDREMOTECONTROLLER) TRANSMISSION(FTC-OUTDOORUNIT) NOTINUSE FUSE(T3.15AL250V) SWITCH*SeeTable3,4and6. SWITCH SWITCH*SeeTable5. SWITCH(4-20mA/1-5V/0-10Vswitch)*SeeTable3. VARISTOR SURGEABSORBER RELAY ACTUALFLOWWATERTEMP.THERMISTOR(Waterpiping) (0℃/15kΩ,25℃/5.2kΩDETECT) PIPETEMP.THERMISTOR/LIQUID(Refrigerantpiping) (0℃/15kΩ,25℃/5.2kΩDETECT)
TB6
TOOUTDOORUNIT POWERSUPPLY
〜/N
21354678 TB141
11
10
912 13 14
ZNR01
ZNR02
X1X2X3X4X5X X76

OFF   Normal ForcedComp.OFF OFF OFF OFF OFF OFF
(IN1) (IN2) (IN3) (IN4) (COM-IN5) (COM-IN6) (COM-IN7) (COM-IN8)
Remark Notinuse Notinuse SW3-6=OFF SW3-6=ON
ON   ForcedComp.OFF Normal Cooling Heating HeatingECO HotWater Anti-Freeze
TB142 1-2 3-4 5-6 7-8 10-11 10-12 10-13 10-14

X1 X2 X3 X4 X5 X6 X7
(OUT1) (OUT2) (OUT3) (OUT4) (OUT5) (OUT6) (OUT7)
OFF OFF Normal OFF OFF OFF OFF 
ON ON Error ON ON ON ON 
Item OperationOutput ErrorOutput Comp.Output DefrostOutput Mode(Cooling)Output Mode(Heating/HeatingECO/ HotWater/Anti-Freeze)Output 
TB141 1-2 3-4 5-6 7-8 9-10 11-12 13-14
RefertoTable2.
Table1Externalinput(Contactsignal) Table2Externaloutput
*1(Fig.1)
Referto Table1.
SW1-6 OFF OFF OFF OFF ON ON ON ON
SW1-7 OFF ON OFF ON OFF ON OFF ON
SW1-8 OFF OFF ON ON OFF OFF ON ON
Heating/HeatingECO/HotWater Upper55℃/lower20℃ Upper60℃/lower20℃*7 Upper50℃/lower20℃     
Anti-Freeze Upper45℃/lower5℃ Upper45℃/lower5℃ Upper45℃/lower5℃     
Cooling Upper25℃/lower5℃ Upper25℃/lower5℃ Upper25℃/lower5℃     
Temperaturetable SW2-1〜8,SW3-1〜3     Table
*8
Table
*8
 
SW3-6 OFF ON
TB142No.5-6input OFF(open) ON(short) OFF(open) ON(short)
Table3SW1，SW6:Inputselection Table5SW3-6LogicofForcedcomp.OFFexternalsignal(TB1425-6) *7.DontusethissettingwhenusingtheSPLITtypeoutdoorunit. *8.Refertoinstallationmanual.

Item Normal ForcedComp.OFF ForcedComp.OFF Normal
SW1-3 OFF ON
Operationmode Heating/HeatingECO/Hotwater/Anti-freeze/Cooling Heating/HeatingECO/Hotwater/Anti-freeze
Table4SW1-3ProhibitionofCoolingmode
*3.0〜2mA:STOP *4.0〜0.5V:STOP *5.Thesignalofexternalinputispriortothesignalofwiredremotecontroller. *6.SPLITtype:thestandardoutdoorunitwithoutaplateHEX(refrigerant-waterHEX)inside.  PACKAGEDtype:theAirtowateroutdoorunitwithaplateHEX(refrigerant-waterHEX)inside.  (ItisnotnecessarytoconnecttoTH2.)

1.SymboIsusedinwiringdiagramare, :Connector, :Terminalblock. 2.FTCandoutdoorunitconnectingwireshavepoIarities,makesuretomatchterminalnumbers(S1,
S2,S3)forcorrectwirings.
3.Sincetheoutdoorunitsideelectricwiringmaychange,besuretochecktheoutdoorunitelectric
wiringdiagramforservicing.
4.ThisdiagramshowsthewiringofFTCandoutdoorunitconnectingwires(specificationof230V),
adoptingsuperimposedsystemofpowerandsignal.
*1:WhenworktosupplypowerseparatelytoFTCandoutdoorunitwasapplied,refertoFig1. *2:Removetheshort-circuitedconnectorCNS2whenworktosupplypowerseparatelytoFTC
andoutdoorunitwasapplied.
*2Removethe
short-circuited connectorCNS2.
Table6SW1-6,7,8 Settemperaturerange  SW1-6=OFF Settemperaturerangewithwiredremotecontroller  SW1-6=ON SettemperaturetablewithDIPswitchofFTC
BH79L347H01
t。 t。
SW3SW2SW1
{ {
{
TB142
FTC
FTC
11
10
12 13
14
Atsite
Atsite
HeatingECO →
Anti-Freeze →
HotWater →
Heating →
6 5 7 8 9 2 1 3 4
ForcedComp.OFF→
Cooling→
ON/OFFInput Externalinput (non-voltagecontact) Externalinput (non-voltagecontact) Externalinputor 4-20mA*3 Externalinputor 1-5V*4 Externalinput Externalinputand Wiredremotecontroller Externalinputand Wiredremotecontroller Wiredremotecontroller
ChangemodeInput Externalinput (non-voltagecontact) Externalinput (non-voltagecontact) Externalinput (non-voltagecontact) Externalinput (non-voltagecontact) Externalinput (non-voltagecontact) Externalinputand Wiredremotecontroller Externalinputand Wiredremotecontroller Wiredremotecontroller
ChangeTEMP. Input DIPswitchonPCB SW2-1〜8,SW3-1〜3 Wiredremotecontroller 4-20mA 1-5V 0-10V DIPswitchonPCB SW2-1〜8,SW3-1〜3 Wiredremotecontroller Wiredremotecontroller
Outdoorunit*6 SPLITtype PACKAGEDtype SPLITtype PACKAGEDtype SPLITtype PACKAGEDtype SPLITtype PACKAGEDtype SPLITtype PACKAGEDtype SPLITtype PACKAGEDtype SPLITtype PACKAGEDtype SPLITtype PACKAGEDtype
SW1-1 ON ON ON ON OFF OFF OFF OFF ON ON OFF OFF OFF OFF OFF OFF
SW1-2 OFF OFF OFF OFF ON ON ON ON ON ON OFF OFF OFF OFF OFF OFF
SW1-5 OFF ON OFF ON OFF ON OFF ON OFF ON OFF ON OFF ON OFF ON
SW1-6 ON ON OFF OFF OFF OFF OFF OFF OFF OFF ON ON OFF OFF OFF OFF
SW6-1 OFF OFF OFF OFF ON ON OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF
SW6-2 OFF OFF OFF OFF ON ON ON ON OFF OFF OFF OFF OFF OFF OFF OFF
Temperaturerangewithwiredremotecontroller
*5 *5
( (
(2) PAC-IF021B-E(FTC)

20
3-5. PCB diagram(Test point )
(1) PAC-IF011B-E, PAC-IF010-E
TB61 1-2
Thermistor (TH1)
TB61 3-4
Thermistor (TH2)
CN21
Thermistor (TH2)
CN29
Thermistor (TH5)
TB61 5-6
Thermistor (TH5)
CN2P
Adjustable resistor
CN2A
4-20mA/1-5V/0-10V
CN22
Wired remote
controller
CN20
Thermistor (TH1)
LED2~5 LED1
Power supply
CN82
External input
Remote switch
CNX1
Operation Output
CNX2
Error Output
CNX3
Comp.Output
CNX4
Defrost Output
CNX5
Mode(Cool)Output
CNX6
Mode(Heat)Output
TB62 1-2
Adjustable resistor
TB62 3-4
4-20mA/1-5V/0-10V
TB62 5-6
Wired remote
controller
CN53
External input
Remote switch
TB142
External input
Remote switch
TB141
External output
TB6
Interface/outdoor
connecting
FUSE
T3,15AL250V
PAC-IF011B-E PAC-IF010-E
TB6
ΟΟ
TB141
Ο
—
TB142
ΟΟ
TB61
ΟΟ
TB62
ΟΟ
CNX1~CNX6 —
Ο
CN20
ΟΟ
CN21
ΟΟ
CN29
ΟΟ
CN2P
ΟΟ
CN2A
ΟΟ
CN22
ΟΟ
Ο
: mounting
—: unmounting