Mitsubishi Electric QAHV-N560YA-HPB, QAHV-N560YA-HPB-BS User Manual

HOT WATER HEAT PUMP

MODEL

QAHV-N560YA-HPB(-BS)

CONTENTS

HOT WATER HEAT PUMP

I.

1. Product Specifications .............................................................................................................................. 2

1-1. Specifications................................................................................................................................... 2

1-2. External Dimensions ........................................................................................................................ 3

1-3. Center of Gravity.............................................................................................................................. 4

1-4. Electrical Wiring Diagrams............................................................................................................... 5

1-5. Optional parts .................................................................................................................................. 7

2. Product Data............................................................................................................................................. 12

2-1. Capacity tables ................................................................................................................................ 12

2-2. Sound pressure levels ..................................................................................................................... 22

2-3. Vibration levels ................................................................................................................................ 23

3. Installation................................................................................................................................................. 24

3-1. Selecting the Installation Site........................................................................................................... 24

3-2. Unit Installation ................................................................................................................................ 28

4. System Design.......................................................................................................................................... 29

4-1. Water Pipe Installation ..................................................................................................................... 29

4-2. QAHV Secondary side control ......................................................................................................... 33

5. Wiring Design............................................................................................................................................ 40

5-1. System Configurations..................................................................................................................... 40

5-2. Electrical Wiring Installation............................................................................................................. 41

6. Controller .................................................................................................................................................. 44

6-1. PAR-W31MAA specifications .......................................................................................................... 44

MEES19K001

1

1. Product Specifications

I.1. Product Specifications

1-1. Specifications

Model QAHV-N560YA-HPB

Power Source 3-phase 4-wire 380-400-415V 50Hz

Capacity *1 kW 40

kcal/h 34400

Power input kW 10.31

Current input A 17.8-16.9-16.3

Capacity *2 kW 40

COP(kW/kW) 3.88

QAHV-N-YA-HPB

Power input kW 10.97

Current input A 20.0-19.0-18.3

COP(kW/kW) 3.65

Capacity *3 kW 40

Power input kW 11.6

Current input A 20.4-19.4-18.7

COP(kW/kW) 3.44

Maximum current input A 33.8

Allowable external pump head 77kPa

Temperature range Inlet water temp 5-63°C

Outlet water temp 55–90°C (when the secondary side control is enabled: 55–80ºC)

Outdoor temp D.B. -25~43°C

Sound Pressure level (measured 1m below the unit in an anechoic room) *1 dB(A) 56

Water pipe diameter and type Inlet mm(in.) 19.05(Rc 3/4"), screw pipe

External finish Acrylic painted steel plate

External dimension H x W x D mm 1837(1777 not including legs) x 1220 x 760

Net weight kg(lbs) 400(882)

Design Pressure R744 MPa 14

Heat exchanger Water-side Copper tube coil

Compressor Type Inverter scroll hermetic compressor

FAN Air flow rate m3/min 220

HIC (HIC: Heat inter-changer) circuit Copper pipe

Protection High pressure protection High pres.Sensor & High pres.Switch at 14MPa(643psi)

Defrosting method Auto-defrost mode (Hot gas)

Refrigerant Type x original charge CO2 (R744) 6.5kg

Notes: Unit converter

*1.Under Normal heating conditions at the outdoor temp, 16°CDB/12°CWB(60.8°FDB/53.6°FWB), the outlet water temperature 65°C(149°F),
and the inlet water temperature 17°C(62.6°F)
*2.Under Normal heating conditions at the outdoor temp, 7°CDB/6°CWB(44.6°FDB/42.8°FWB), the outlet water temperature 65°C(149°F),
and the inlet water temperature 9°C(48.2°F)
*3.Under Normal heating conditions at the outdoor temp, 7°CDB/6°CWB(44.6°FDB/42.8°FWB), the outlet water temperature 65°C(149°F),
and the inlet water temperature 15°C(59.0°F)
*Due to continuing improvements, specifications may be subject to change without notice
*Do not use steel pipes as water pipes.
*Keep the water circulated at all times. Blow the water out of the pipes if the unit will not be used for an extended period time.
*Do not use ground water or well wat er
*Do not install the unit in an environment where the wet bulb temperature exceeds 32°C
*The water circuit must use the closed circuit
*There is a possibility that the unit may abnormally stop when it operates outside its operating range. Provide backup
(ex.boiler start with error display output signal (blue CN511 1-3)) for abnormal stop.

Outlet mm(in.) 19.05(Rc 3/4"), screw pipe

Water MPa 0.5

Air-side Plate fin and copper tube

Maker MITSUBISHI ELECTRIC CORPORATION

Starting method Inverter

Motor output kW 11.0

Case heater kW 0.045

Lubricant PAG

Type x Quantity Propeller fan

Control, Driving mechanism Inverter-control, Direct-driven by motor

Motor output kW 0.92

Inverter circuit Overheat and overcurrent protection

Compressor Overheat protection

Fan motor Thermal switch

Flow and temperature control LEV

Btu/h 136480

kcal/h 34400

Btu/h 136480

kcal/h 34400

Btu/h 136480

41-145.4ºF

131–194ºF (when the secondary side control is enabled: 131–176ºF)

-13~109.4°F

<MUNSELL 5Y 8/1 or similar>

in. 72.3(69.9 not including legs) x 48.0

L/s 3666

cfm 7768

kcal/h =kW x 860

BTU/h =kW x 3,412

cfm =m3/min x 35.31

lbs =kg/0.4536

MEES19K001

2

1. Product Specifications

1-2. External Dimensions

QAHV-N560YA-HPB(-BS)

Unit: mm

QAHV-N-YA-HPB

54

VENTILATION SPACE

<PLAN>

SERVICE SPACE

145

(908)

MORE THAN 50

MORE THAN 50

VENTILATION • SERVICE SPACE

MORE THAN 300

MORE THAN 500

118

INTAKE

DISCHARGE

AIR

AIR

9

BACK VIEW

145

DRAIN OUTLET(*1)

ø38.1

(60)

26 5454 26

755

(635)

RIGHT SIDE VIEW

The specification of the product is for the improvement

a previous notice and might change.

760

1220

TOP VIEW

304

<SUB>

CONTROL BOX

DISPLAY

<MAIN>

CONTROL BOX

INTAKE

INTAKE

AIR

AIR

1837
1777

19

1472

SERVICE

PAN EL

HOLE TO PASS ROPE

FOR CARRYING

297

85 9085

274

(24)

122

206

60 60

(60)

ANCHOR BOLT HOLE

(WATER PIPE)

DRAIN OUTLET

ø39 KNOCKOUT HOLE

HOLES FOR TRANSMISSION CABLE

FRONT VIEW

(488)

187

199

(755)

(MOUNTING PITCH)

719(716~722)

530

(*1)

2×2-14×20 OVAL HOLE (without REMOVABLE INSTALLATION LEGS)

2×2-14×31 OVAL HOLE

(ANCHOR BOLT HOLE)

18 18

7474

BOTTOM VIEW

1060(MOUNTING PITCH)

MEES19K001

HOLE FOR POWER SUPPLY

ø62 KNOCKOUT HOLE

HOT WATER OUTLET<Rc3/4B>

WATER INLET<Rc3/4B>

REMOVABLE INSTALLATION LEGS

3

1. Product Specifications

1-3. Center of Gravity

QAHV-N560YA-HPB(-BS)

QAHV-N-YA-HPB

1777

Unit: mm

1837

1060

1208

600

316497

1874 719

755

MEES19K001

4

1. Product Specifications

1-4. Electrical Wiring Diagrams

QAHV-N560YA-HPB(-BS)

M

MP1

4

3

216

4

557611

DC280-340V

Rectifier

circuit

X10

F07

AC250V

6.3A T

CND

red

2

3

4

5

5

2

3

CNMF

BS08S-

power board

4
3
2

CNXB1

1234121

CNXC1

blue

CNXA1

Ref temp
Discharge
Compressor

Ref temp
Gascooler

Ref temp
Suction
Compressor

Ref temp
Air hex inlet

Outdoor temp

Water sensor.3
External

TH17

Water sensor.2
External

TH16

Water sensor.1
External

TH15

temp
Water outlet

TH11

temp
Water inlet

TH12TH5 TH1TH4TH9 TH2 TH3

Ref temp
Air hex outlet

TH19TH18

(secondary circuit)
Water sensor
External

1~5V/2~10V
4~2~0mA/0~10V
Analog input
Water temp.setting

*9,10

SV5

654312 7

red

CN33

X37

CN52

CN39

6543 127

213

Relay4-8

board

IT

654312 7

312 4

12

4321

22221111

TB5

6234

30

27 28

3

25 26

34514

1212

TB5

5123

T4

4
321

t° t° t° t° t° t° t° t° t° t° t° t° t°

T1 T2

)

-

(

)
+

(

12

CNRL

red

CNOUT1

red

CNXC1

CNXA2

blue

CN401

CN402

green

CN404

black

CN405

blue

yellow

CN406

CN407

red

CN408

CN409

CN421

CN4A

black

CN61

green

523 614

TERMINAL

543 12

CN105

black

CNAC2

LED4:Power supply

Control Board

CNPL3

black

GND

2

311212

S1

black

CN2A

2431

12

Flow

sensor.1

Capacity mode 2

(short/cut)

Capacity mode 1

(short/cut)

CN142A

black

LED1

CNPL1

CNPL2

green

+12V+12V+12V

R12

14

16

17

15

S3

S2

Flow

sensor

No-Voltage

contact

input

mode(On/Off)

23-24 Run(Run/Stop)

21-24 Low-noise mode

(low noise/by ordinary)

(Forced/Normal)

21

35

23

TB5

1241243

CN142C

SWP1

UP

32-33 Hot-water storage

24

333132

TB6

165432

A(to be

Fan mode

34

3

CN142B

blue

lit while energized

SWU3

LED3:Remote controller

SWU2

SWS2SWS1

SWU1

Unit address setting

yellow

R11

TB4

13

(secondary

circuit)

blue

CN422

t°

TH14

Shell Ref temp

X03

CN502

12 3

3

1

2

6

4

5

H1

12

H2

123456789

System error(Normal/Error)

19-20 Demand(On/Off)

19

234561

CN142D

blue

SWP3

SWP2

prepared)

B(automatic)

External pump

Emergency signal

(for extra heater)

20

TB6

22334576 1

X08

X09

CN512

yellow

ENTER

ONONON

12345678910

OFFOFFOFF

DOWN

123456789

*11

OFF

LOCAL

REMOTE

X02

CN501

81

SV2 SV1SV4 SV3

X01

123

80

63H1

TB2

PSL1PSH1

40

No-voltage

contact

output

Error display output

(secondary circuit)

TB8

1675432 1675432

X06

X07

CN511

blue

312

yellow

CN801

321

red

CN63LS

33

3

22

2

11

1

12

GND GND+5V +5V

CN63HS

TB9

41

External device

connecting terminal

Operation display output

Optional remote controller

connecting terminal

86

737475

87

X04

CN510

ON

12

SW421

OFF

operation

LED2:CPU in

Control

black

CNTYP1

CNTYP2

1212 33

2

(Non-polarized)

RA

RB

TB5

1

blue

CN3A

Power circuit

black

1

Z21

72

X05

10

SW3 SW2 SW1

10987654321

AC250V

3.15A T

F06

red

CNAC

Flow adjustment device

(secondary circuit)

101112

312

CNVOUT

yellow

12

red

CN52C

564321

CNLVC

312

green

CNLVB2

6
5
4
3

CNLVB

red

2
1

564321

CNLVA

blue

5
4
3

CNIT

red

2
1

6
5
4
3

CN62

green

12

pink

312

CNDC

green

CNWP

t°

TB6

72C

CNIT

CNIT

red

243311542

CN102

21

yellow

CNS2

Transmission

2

M

LEV3

8
7
6
5
4
3
2
1

M

LEV1

supply

LED1:Power

TB7

Central

control

TB3

power circuit

13

CN04

red

MVW1

M

TP2

TP1

S

Upper controller

AE-200 connecting terminals

A/M1 B/M2

A/M1 B/M2

Ter m in a l

between units

(TB3-A/M1,B/M2)

Transmission

power board

QAHV-N-YA-HPB

251346

CN80

CN81

green

513462

1

OFF ON

FAN Board

F121

DC700V

4A T

CNSNR

41325

4321

CN82

6

IPM

RSH01,

C152

C151

CNVDC

2314

12

black

blue

CN83

SW001

LED1:Normal operation(lit)

RSH02

7654321

V

U

M

3~

Fan motor

(Heat exchanger)

/Error(blink)

LED4:CPU in operation

*3

R5

C100

R1

DCL

CNINV

W

black

12

2

34

156

7

yellow

CN43

21

CN6

LED1:Normal operation(lit)

/ Error(blink)

4

2

black

72C

SC-P1

1

3

red

SC-P2

red

CN1

3

1

R05

CN5

red

D1

R04

CN4

blue

123 23

CN2

6
5412

123

234156127

CNTYP

RSH1

1234

-

Z5

U

+

Z4

F01,F02,F03

C31

C30

THHS

t°

IGBT

C33

C35

C37

++++++

C32

C34

C36

Diode

Bridge

Noise

Filter

U

F02

F03

AC250V

6.3A T

black

SC-V

R31

++

R30

F04

C10

F01

Z3

Z2

Z1

R33

R32

AC250V

6.3A T

C6

C5

C4

C9

C3

U

U

U

SC-L1

R35

R34

C8

C2

SC-W

SC-U

red

red

C7

SC-L2

C1

white

white

CT22

black

red white

CT12

SC-L3

CT3

black

blackwhite

red

W

3~

MS

V

Motor

U

(Compressor)

INV Board

321

CN3

green

black

R03

TB24

N

TB23

L3

TB22

L2

TB21

L1

CN1B

1
2
3

R01

R02

4

13
2

CN1A

E

L

ELB1

L1 L2 L3 N

TB1

~

50Hz

380/400/415V

3N

power supply

input

mode

Capacity mode table

*

Max capacity operation

Energy saving operation 1

(factory setting)

Energy saving operation 2

CN2

C1

FT-P

FT-N

P

N

R06

+

C17

DSA

MEES19K001

5

1. Product Specifications

QAHV-N-YA-HPB

Ac current sensor

Capacitor (Electrolysis)

DC reactor

Symbol explanation

CT22

CT12

Symbol explanation

CT3

DCL

C100

F01

F02

F03

Fuse

F04

Crankcase heater (for heating the compressor)

F06

Electric heater (Antifreeze)

Electronic expansion valve (Main circuit)

F121

H1

H2

LEV1

F07

Compressor motor

Pump motor

Fan motor

Electronic expansion valve (Injection)

M

MS

MP1

LEV3

Resistance (for Water flow rate sensor 2)

Water flow control valve

MVW1

Resistance (for Water flow rate sensor 3)

Low pressure sensor

High pressure sensor

R11

R12

PSH1

PSL1

Solenoid valve (Defrost)1

Solenoid valve (Defrost)3

Electrical resistance

Solenoid valve (Defrost)2

R1

R5

SV2

SV1

Water flow rate sensor

Solenoid valve (Defrost)4

Solenoid valve (Injection circuit)

SV4

SV5

SV3

S1

Thermistor

High pressure switch

Function setting connector

IGBT temperature

THHS

TH1~5,9,11,12,14

Z21

63H1

Earth leakage breaker

Thermistor

*TH15~18

*S2,3

72C

<ELB1>

Water flow rate sensor

Electromagnetic relay (Inverter main circuit)

* of symbol item is the optional parts, <> is field-supplied parts.

MEES19K001

ON

ONON

OFF

OFFOFF

OFF

OFF

SW421-1 SW421-2

20mA

~5V

~10V

:Terminal block : Connection by cutting the short circuit wire

(no-voltage contact input and remote controller wiring) and wiring of 100V

Press the tab in the middle of the terminals to remove them.

Check that the terminals are securely locked in place after insertion.

3. Faston terminals have a locking function.

4. The symbols of the field connecting terminals are as follows.

1. The broken lines indicate the optional parts,field-supplied parts,and field work.

2. Dashed lines indicate sub box

5. The method of input signal of operation can choose one of optinal remote controller

or greater.Do not place them in the same conduit tube or cabtyre cable as

or no-voltage input.

6. Leave a space of at least 5 cm between the low voltage external wiring

use a separate cabtyre cable for the following wiring.

this will damage the circuit board.

7. When cabtyre cable is used for the control cable wiring,

(a) Optional remote controller wiring

(b) No-voltage contact input wiring

(c) No-voltage contact output wiring

Using the same cabtyre cable may cause malfunctions

and damage to the unit.

(d) Remote water temperature setting

Set the SW421 as shown in the table below.

9. Need to selects either Water temperature setting input signal.

8. Use a contact that takes 12VDC 1mA for no-voltage contact input.

~10V

~

1

0

4

2

Feeding 30mA or more current may damage the circuit board.

10. Use a 4-20mA signal output device with insulation.

11. For prevention of damage of the pump, SWS2 is set in "A"(factory setting).

Note

contact output.

Change the slide switch SWS2 B(automatic) in Test Run.

12. Use a contact that takes 250VAC, 10mA or above, and 1A or below for no-voltage

6

1. Product Specifications

1-5. Optional parts

1-5-1. Remote controller PAR-W31MAA

Refer to 6-1. PAR-W31MAA specifications.

QAHV-N-YA-HPB

MEES19K001

7

1. Product Specifications

External water temperature sensor TW-TH16-E

Parts Shape Quantity

Thermistor

ABC

D

A: 157 mm
B: 42 mm
C: 54 mm
D: 48 mm

1 pc

Flow sensor kit

Parts Shape Quantity

Flow sensor

A

B

A: 71.5 mm
* 129 mm including the

coupler
B: ø30 mm
Wiring length: 1.9 m

1 pc

O-ring

A

B

C

A: 15.8 mm
B: 2.4 mm
C: 20.6 mm

2 pcs

Quick fastener

A

B

C

A: 38.6 mm
B: 15 mm
C: 14 mm

2 pcs

Coupler 1
(IN-side)

A

Thread: R3/4
Hex 30
A: 36 mm

1 pc

Coupler 2
(OUT-side)

A

Thread: R3/4
Hex 30
A: 43.2 mm

1 pc

Cable tie (2 types)

A

B

Long cable tie
A: 380 mm
B: 4.7 mm

2 pcs

+

1 spare

Short cable tie
A: 100 mm
B: 2.5 mm

1 pc

+

1 spare

IN-side

OUT-side

* The size and length noted are approximate.

1

1

2

3

4

5

6

Specification

Specification

1-5-2. Secondary circuit kit Q-1SCK

This kit contains External water temperature sensor TW-TH16-E and Flow sensor kit for use on the secondary side of hot

water heat pump (QAHV) units. Make sure the following parts are included.

QAHV-N-YA-HPB

MEES19K001

8

1. Product Specifications

External water temperature sensor TW-TH16

1. Parts that are required to install an external water temperature sensor

A) External water temperature sensor
B) Wiring to connect the sensor and the unit*
C) Wiring terminals to connect the wiring to the sensor and the terminal block

on the unit
(Four for M4 screws)*
* Items B) and C) are field supplied.

2. Installing the external water temperature sensor

Install the external water temperature sensor where the water pipes merge or on the load-side tank.
Install horizontally or vertically on top of the pipe.
When installing horizontally, make sure the wiring faces down.

Wiring specifications

Size

Type

Maximum length

2-core cable (Min.1.25 mm2)

CVVS or CPEVS

20 m

QAHV-N-YA-HPB

Vertical installation

Horizontal installation

3. Wiring the external water temperature sensor

Connect the external water temperature sensor wiring to the terminal block in the control box on the unit as shown in
the figure below.

External water temperature sensor

Sensor wiring

ø6

Sensor
Sensor properties

· Resistance: R = 15 kΩ ± 3% (0°C)

· B-constant: 3460 K

Note

R 1/2

12-pin terminal block in the control box on the unit

(Note) Run the sensor wiring at least 5 cm away from any wiring that
carries a voltage of 100 V or more, and do not put the sensor
wiring in the same conduit tube with it.

T2T1

Control box

5442157

20

12

ø10

48

A

Unit

ø78

M4 screw × 3

Terminal screws

A

BB

50

f)

Terminal block for connection to the sensor

e)

MEES19K001

Connect the sensor wiring to terminals T1 and T2 of the 12-pin
terminal block in the control box on the unit.

Connect the shield to the earth terminal.

Thread the wiring to the external water temperature sensor
through parts b) through d) as shown in the figure at right. Attach
M4 terminals (not supplied) to the wirings, and connect them to
e) and f) (terminals A and B).

After the wiring is connected, securely tighten the tightening
screw d), and then caulk the gap between the wiring a) and the
tightening screw to keep water from entering.

b) Water-sealing rubber

(Internal diameter ø11)

c) Washer (Internal diameter ø12)

d) Tightening screw

(Internal diameter ø15)

Shield (to be cut)

a) Wiring (not supplied)

Detailed view of the area labeled “A” in the figure above

9

1. Product Specifications

Flow sensor kit

1. Tools and materials needed for an installation of the flow sensor

Have the following tools and materials ready before starting.

1 Flow sensor 1 Tightening torque: 50 N·m ± 10%
2 O-ring 2 *2 Only use silicon grease.
3 Quick fastener 2 *3 Select the following type of extension wiring.
4 Coupler 1 (IN-side) 1 Wiring diameter 0.812 mm or larger
5 Coupler 2 (OUT-side) 1 Type CVVS or CPEVS
6 Cable tie (short) 1 Maximum length 20 m
7 Cable tie (long) 1 to 2 *4 Select the type of terminal block that meets the following.

QAHV-N-YA-HPB

1 Screwdriver - Terminal screw diameter of M3.5 or M4
2 Torque wrench (spanner) *1
3 Grease *2
4 Extension wiring *3
5 Terminal block *4

2. Flow sensor installation

Install the flow sensor on the pipe by following steps (1) through (3) below.
Install the flow sensor between the secondary-side pump and the heat exchanger.
Refer to the Installation/Operation Manual of QAHV-N560YA-HPB for details.

(1) Install an O-ring on the flow sensor and coupler 2 (OUT-side).

OUT-side

Materials Quantity *1 Size: HEX 30

Tools and locally procured materials - Usable at or above 15 V

O-ring

IN-side*

- Water-proof

O-ring

Both of the parts shown at left have a groove on the
smaller end. Apply grease to the O-rings, and then fit
them into the groove.

Flow sensor

Coupler 2 (OUT-side)

(2) Connect a coupler to the pipe, and connect the flow sensor.

The degree of incline
should be less than 5
degrees.

Pipe

Screw in.

Coupler 1

Flow sensor

installation

position

(IN-side)

Coupler 2
(OUT-side)

Screw in.

Pipe

Up

The IN-side of the
coupler must face
up.

Flow direction

Down

No more than 5 degrees
of incline allowed

(3) Install the quick fastener on the pipe.

Quick fastener installation

Quick fastener

When installing the
quick fastener, use
caution not to let it
come in contact with
the wiring.

Quick fastener

Hold the wiring with a cable tie.

Place a cable tie
over the protective
tube to hold the
wiring on the pipe.

Thread the cable tie
through the hole on
the quick fastener,
and hold the wiring
in place.

* The end with a smaller bore is the IN-side. Be sure to install

them in the correct orientation.

Attach the coupler to the pipe so that

Coupler 1

(IN-side)

Insert

Flow direction

Insert

Coupler 2

(OUT-side)

the IN-side of the coupler faces up

and the OUT-side of the coupler

faces down. (Water flows from top

to bottom.) The incline of the pipe

should not exceed 5 degrees.

Keep the sensor away from water.

The flow sensor is 71.5 mm long.

Keep an appropriate distance

between the couplers.

Fit the flow sensor to the coupler.

Insert the flow sensor into the couplers,
and then fit the quick fasteners where
the flow sensor and the couplers are
connected to each other. Keep the
quick fasteners out of contact with the
wiring so as not to damage the wiring.
Hold the wiring to the quick fastener
with a (short) cable tie as shown in the
figure to keep the wiring from being
damaged.
Extend the length of the wiring as
necessary, using a terminal block.
Keep the wiring and the terminal block
dry.

MEES19K001

10

1. Product Specifications

3. Flow sensor wiring connection

Connect the wiring by following steps (1) through (4) below.

(1) Open the panel.

Using a screwdriver, remove the SERVICE PANEL and the CONTROL BOX (SUB) cover.

SERVICE PANEL

(2) Thread the wiring into the unit.

B

C

CONTROL BOX (SUB)

1

Thread the flow sensor wiring through A in the
figure.

2

Hold the wiring with the cable strap inside
the unit indicated as B in the figure to keep
it out of contact with the pipes and other
components.

3

Thread the wiring through the rubber bush
indicated as C in the figure (second one from
the left).

QAHV-N-YA-HPB

A

(3) Connect the wiring.

1

2

1

Flow sensorTerminal block box

Wiring
(not supplied)

Black

15
14
13

White

Terminal block
(not supplied)

Red

* Refer to the Installation/Operation Manual of QAHV-

N560YA-HPB for the detailed explanation on how to
open the part indicated as A and how to route the
wiring indicated as B in the figure.

* Perform wiring work for the flow output adjustment

device and the thermistor at the same time.

2

Flow adjusting device
(Reference)

0-10V

+10V

GND

Connect the flow sensor
wiring to the terminal block
inside the BOX. The numbers
on the wirings correspond to
the numbers on the terminal
block.
Connect each wiring to the
correct terminal.
When done, hold the excess
wiring with the supplied cable
tie (long).
Also, hold the wirings in
place with a cable tie (long)
where indicated as B in the
figure to keep them out of
contact with the pipes and
other components.

(4) Close the panel.

Using a screwdriver, re-place the SERVICE PANEL and the CONTROL BOX (SUB) cover.

4. Cautionary notes

Note the following when performing wiring work.

Turn off the power before performing wiring work to avoid electrocution.
Watch for sharp edges of sheet metal.
Keep external wiring at least 5 cm away from wiring that carries 100 V or higher.
Do not bundle the wiring together with strong current wiring.
Connect wiring in a way that minimizes electrical noise interference. Shield the wiring to minimize external effects.
Install the flow sensor indoors, and insulate it as necessary to keep it from being exposed to subzero temperatures.
Keep the wiring and the terminal block dry.

MEES19K001

11

2. Product Data

2. Product Data

2-1. Capacity tables

2-1-1. Correction by temperature

Outlet water temperature 60~70°C
Energy saving operation 1 mode

QAHV-N560YA-HPB(-BS)

QAHV-N-YA-HPB

65

60

55

50

45

40

35

Capacity

Inlet water temperature 5°C, 400V, unit with a snow hood

Inlet water temperature

5°C~29°C

30

Capacity (kW), Power input (kW)

25

20

15

10

Inlet water temperature
5°C, 9°C, 17°C, 24°C, 29°C
starting from the bottom

5

0

-30 -20 -10 0 10 20 30 40 50

Inlet water temperature
29°C, 24°C, 17°C, 9°C, 5°C
starting from the bottom

Power input

5°C

9°C

17°C

Inlet water temperature

24°C

29°C

29°C
24°C

17°C

9°C
5°C

MEES19K001

Intake air temperature (°C D.B.)

12

2. Product Data

Outlet water temperature 80°C
Energy saving operation 1 mode

65

60

55

50

45

QAHV-N-YA-HPB

40

35

30

Capacity (kW), Power input (kW)

25

20

15

10

Inlet water temperature
5°C, 9°C, 17°C, 24°C, 29°C
starting from the bottom

Capacity

Inlet water temperature
29°C, 24°C, 17°C, 9°C, 5°C
starting from the bottom

Power input

5°C

9°C

Inlet water temperature

Inlet water temperature

24°C

17°C

5°C~29°C

29°C

29°C
24°C

17°C

5°C
9°C

MEES19K001

5

0

-30 -20 -10 0 10 20 30 40 50

Intake air temperature (°C D.B.)

13

2. Product Data

Outlet water temperature 90°C
Energy saving operation 1 mode

65

60

QAHV-N-YA-HPB

55

50

45

40

Inlet water temperature
24°C, 17°C, 9°C, 5°C
starting from the bottom

35

30

Capacity (kW), Power input (kW)

25

20

15

Inlet water temperature

10

24°C, 5°C, 9°C, 17°C
starting from the bottom

Capacity

Power input

9°C

5°C

24°C

Inlet water temperature

5°C
9°C

17°C

24°C

Inlet water temperature

17°C

9°C

5°C
17°C
24°C

MEES19K001

5

0

-30 -20 -10 0 10 20 30 40 50

Intake air temperature (°C D.B.)

14

2. Product Data

Outlet water temperature 60~70°C
Max capacity operation mode

65

60

55

50

45

40

35

Capacity

Inlet water temperature 5°C, 400V, unit with a snow hood

Inlet water temperature

5°C
9°C

17°C

24°C

29°C

QAHV-N-YA-HPB

30

Capacity (kW), Power input (kW)

25

20

15

Inlet water temperature
5°C, 9°C, 17°C, 24°C, 29°C
starting from the bottom

10

5

0

-30 -20 -10 0 10 20 30 40 50

Power input

MEES19K001

Intake air temperature (°C D.B.)

15

2. Product Data

Outlet water temperature 80°C
Max capacity operation mode

65

60

QAHV-N-YA-HPB

Inlet water temperature

55

50

45

40

35

30

Capacity (kW), Power input (kW)

25

Capacity

5°C

9°C

17°C

24°C

29°C

Power input

20

Inlet water temperature

29°C
24°C

15

17°C
9°C
5°C

5°C
9°C

17°C
24°C
29°C

10

5

0

-30 -20 -10 0 10 20 30 40 50

Intake air temperature (°C D.B.)

MEES19K001

16

2. Product Data

Outlet water temperature 90°C
Max capacity operation mode

65

60

55

50

QAHV-N-YA-HPB

45

40

Inlet water temperature

35

29°C, 24°C, 17°C, 9°C, 5°C
starting from the bottom

30

Capacity (kW), Power input (kW)

25

20

15

10

Inlet water temperature
29°C, 24°C, 5°C, 9°C, 17°C
starting from the bottom

5

Capacity

Power input

9°C

17°C

5°C

24°C

Inlet water temperature

Inlet water temperature

29°C

5°C

9°C

17°C

24°C

29°C

5°C
9°C

17°C
29°C
24°C

MEES19K001

0

-30 -20 -10 0 10 20 30 40 50

Intake air temperature (°C D.B.)

17

2. Product Data

Outlet water temperature 60~70°C
Energy saving operation 2 mode

QAHV-N-YA-HPB

65

60

55

50

45

40

35

Inlet water temperature 5°C, 400V, unit with a snow hood

Inlet water temperature

5°C

9°C

Capacity

17~29°C

30

Capacity (kW), Power input (kW)

25

20

15

10

Inlet water temperature
5°C, 9°C, 17°C, 24°C, 29°C
starting from the bottom

5

0

-30 -20 -10 0 10 20 30 40 50

Power input

5°C

Inlet water temperature
29°C, 24°C, 17°C, 9°C, 5°C
starting from the bottom

9°C

17°C

Inlet water temperature

9°C

24°C

5°C

29°C

MEES19K001

Intake air temperature (°C D.B.)

18

2. Product Data

Outlet water temperature 80°C
Energy saving operation 2 mode

65

60

55

QAHV-N-YA-HPB

50

45

40

35

30

Capacity (kW), Power input (kW)

25

20

Capacity

Inlet water temperature
29°C, 24°C, 17°C, 9°C, 5°C
starting from the bottom

Power input

Inlet water temperature

5°C

9°C

17~29°C

MEES19K001

15

Inlet water temperature

5°C
29°C

24°C

10

Inlet water temperature

9°C

17°C
5°C, 9°C, 17°C, 24°C, 29°C
starting from the bottom

5

0

-30 -20 -10 0 10 20 30 40 50

Intake air temperature (°C D.B.)

19

2. Product Data

Outlet water temperature 90°C
Energy saving operation 2 mode

65

60

QAHV-N-YA-HPB

55

50

45

Capacity

Inlet water temperature

5°C

40

Inlet water temperature

35

29°C, 24°C, 17°C, 9°C, 5°C
starting from the bottom

30

Capacity (kW), Power input (kW)

25

20

15

10

Inlet water temperature
29°C, 24°C, 5°C, 9°C, 17°C
starting from the bottom

Power input

9°C

24°C

5°C

29°C

Inlet water temperature

17°C

9°C

17°C

24°C

29°C

29°C
24°C
17°C
9°C
5°C

MEES19K001

5

Inlet water temperature

0

-30 -20 -10 0 10 20 30 40 50

Intake air temperature (°C D.B.)

20

2. Product Data

2-1-2. Correction by relative humidity

1.05

RH (%)

90

85 90

QAHV-N-YA-HPB

1.00

85

70

80

0.95

70

60

40

50

80

30

0.90

Capacity correction factor

30

40

50

0.85

60

0.80

-15 -10 -5 0 5 10 15 20 25 30

Outside air temperature (°C D.B.)

35 40

MEES19K001

21

2. Product Data

2-2. Sound pressure levels

Measurement condition

QAHV-N560YA-HPB(-BS)

QAHV-N-YA-HPB

1m

Measurement
location

1.5m

Sound Pressure Level: 56.0 / 58.0 dB (Spring, Autumn/Winter)

Opetation condition… Spring, Autumn: Outdoor temp.: 16°CDB/12°CWB, Inlet water temp.: 17°C, Outlet water temp.: 65°C

Winter: Outdoor temp.: 7°CDB/6°CWB, Inlet water temp.: 9°C, Outlet water temp.: 65°C

Winter

90

80

70

60

50

40

Octave band sound level (0dB=20μPa)

30

Spring, Autumn

NC-70

NC-60

NC-50

NC-40

NC-30

MEES19K001

20

Approximate minimum
audible limit on
continuous noise

10

63Hz 125Hz 250Hz 500Hz 1000Hz 2000Hz 4000Hz 8000Hz

Octave band central frequency (Hz)

NC-20

22

2. Product Data

2-3. Vibration levels

QAHV-N-YA-HPB

Measurement location

Concrete

Model Vibration Levels [dB]

QAHV-N560YA-HPB(-BS) 47 or less

10cm

20cm

MEES19K001

23

3. Installation

Wind

Wind

• Install the outdoor unit in a place
where it is not exposed to direct wind,
such as behind a building.

• Install the outdoor
unit so that the outlet/
inlet faces away from
the wind.

Wind

3. Installation

3-1. Selecting the Installation Site

3-1-1. Installation Conditions

Select the installation site in consultation with the client.

Select a site to install the outdoor unit that meets the following conditions:

The unit will not be subject to heat from other heat sources.
The noise from the unit will not be a problem.
The unit will not be exposed to strong winds.
Water from the unit can be drained properly.
The space requirements as shown in 3-1-2. Installation Space Requirements.

QAHV-N-YA-HPB

1. Protection against winds

Using the figures at right as a reference,
provide adequate protection against winds.
A unit installed alone is vulnerable to strong
winds.
Select the installation site carefully to
minimize the effect of winds.
When installing a unit in a place where the
wind always blows from the same direction,
install the unit so that the outlet faces away
from the direction of the wind.

2. Cold Climate Installation

Observe the following when installing the units in areas where snow or strong winds prevail.

Avoid direct exposure to rain, winds, and snow.
Icicles that may form under the foundation can fall and inflict personal injury or property damage. Select the installation site

carefully to reduce these risks, especially when installing the unit on a roof.

If the units are installed in the direct line of rain, winds, or snow, install the optional snow hood (on both the discharge and

suction ducts). Use a snow net or snow fence as necessary to protect the unit.

Install the unit on a base approximately twice as high as the expected snowfall.
If the unit is continuously operated for a long time with the outside air temperature below the freezing point, install a heater

at the base of the unit to prevent the water from freezing at the unit bottom.

When using the unit in an outdoor temperature of -15ºC or below, install a drain pan (with heater whose capacity is 320 W

or more) at the bottom surface of the unit.

MEES19K001

24

3. Installation

3-1-2. Installation Space Requirements

Provide sufficient space around the unit for effective operation, efficient air movement, and ease of access for maintenance.

1. Single unit installation

(1) When all walls are within their height limits*.

QAHV-N-YA-HPB

[mm]

≤ Unit height

≤ 500

L2

L3

L3

≤ Unit height

When the distance behind the unit (L2) needs to be small 500 300 50

L1

* Height limit

Front/Right/Left Same height or lower than the overall height of the unit

Rear 500 mm or lower from the unit bottom

Required minimum distance [mm]

L1 (Front) L2 (Rear) L3 (Right/Left)

(2) When one or more walls exceed their height limits*.

When the wall(s) at the front and/or
the right/left exceed(s) their height

When the wall at the rear exceeds
its height limit

When all walls exceed their height
limits

limits

L3

h1

Unit height

h3

≤ 500

Unit height

L3

L1

L2

L3

≤ Unit height

L3

≤ Unit height

L1

h2

500

L2

h3

h1

L3

Unit height

L3

Unit height

L1

h2

500

L2

Add the dimension that exceeds the height limit (shown as "h1" through "h3" in the figures) to L1, L2, and L3 as
shown in the table below.

Required minimum distance [mm]

L1 (Front) L2 (Rear) L3 (Right/Left)

When the distance behind the unit (L2) needs to be small 500 + h1 300 + h2 50 + h3

MEES19K001

25

3. Installation

2. Multiple unit installation

When installing multiple units, make sure to take into consideration factors such as providing enough space for
people to pass through, ample space between blocks of units, and sufficient space for airflow. (The areas marked

A

with in the figures below must be left open.)

In the same way as with the single unit installation, add the dimension that exceeds the height limit (shown as "h1"
through "h3" in the figures) to L1, L2, and L3 as shown in the tables below.

QAHV-N-YA-HPB

(1) Side-by-side installation

A

L4

h1

Unit height

Required minimum distance [mm]

L1 (Front) L2 (Rear) L4 (Between)

500 + h1 300 + h2 100

A

Leave open in two directions.

A

L1

(2) Face-to-face installation

When there are walls in the front and rear of
the block of units

[mm]

h2

500

L2

When there is a wall on either the right or left
side of the block of units

A

h1

Unit height

L1

Required minimum distance [mm]

L1 (Front) L2 (Rear) L4 (Between)

500 300 500

A

Leave open in two directions.

A

L4

h2

500

L2

L4

h3

Unit height

L3

Required minimum distance [mm]

L3 (Right/Left) L4 (Between)

50 + h3 500

L4

L4

MEES19K001

26

3. Installation

3. Combination of face-to-face and side-by-side installations

When there are walls in the front and rear of
the block of units

A

L4

h2’

500

Required minimum distance [mm]

L2 (Right) L2’ (Left) L4 (Between)

300 + h2 300 + h2’ 1000

A

Leave open in two directions.

L2’

A

When there are two walls in an L-shape

h3

Unit height

h2

500

L2

L3

A

Required minimum distance [mm]

L2 (Right) L3 (Right/Left) L4 (Between)

300 + h2 1000 + h3 1000

[mm]

L2

A

L4

QAHV-N-YA-HPB

h2

500

3-1-3. System installation restrictions

Piping length restrictions

The maximum piping length is 60 m.
Select appropriate diameter pipes to prevent negative pressure from the pumping head and the pressure loss in the pipes.
Pumping head (when maximum flow rate is 17 ℓ/min): 77 kPa

Installation height restrictions

• When the unit is installed above the storage
tank
Decide the height so that the unit inlet water
pressure will not be negative for the tank
pressure.

Heat

pump

unit

Unit inlet water pressure > 0 MPa

Storage

tank

• When the unit is installed below the storage
tank
Decide the height so that the unit inlet water
pressure will be 0.5 MPa or below for the tank
pressure.

Storage

tank

Unit inlet water pressure < 0.5 MPa

Heat

pump

unit

MEES19K001

27

3. Installation

3-2. Unit Installation

Units should be installed only by personnel certified by Mitsubishi Electric.

Securely fix the unit with bolts to keep the unit from falling down during earthquakes or due to strong winds.
Install the unit on a foundation made of concrete or iron.
Noise and vibrations from the unit may be transmitted through the floor and walls. Provide adequate protection against

noise and vibration.

Build the foundation in such way that the corners of the installation legs are securely supported as shown in the figure

below. When using rubber vibration isolators, make sure they are large enough to cover the entire width of the unit's

QAHV-N-YA-HPB

legs. If the corners of the legs are not firmly seated, the legs may bend.

The projecting length of the anchor bolt should be less than 30 mm.
This unit is not designed to be installed using hole-in anchor bolts unless brackets are used to support the four corners

of the unit.

The legs on the unit are detachable.
Detaching the legs

Loosen the three screws on the legs to detach each leg (two each in the front and back). If the finish coat becomes
damaged when detaching the legs, be sure to touch it up.

Be sure to install the unit on a surface strong enough to withstand its weight to keep the unit from falling down

and causing injury.

Provide adequate protection against strong winds and earthquakes. Improper installation may cause the unit

to fall down, resulting in personal injury.

When building the foundation, take the floor strength, water drainage during operation, and piping and wiring routes into
consideration.

Precautions for routing the pipes and wires underneath the unit without detachable legs
When routing the pipes and wires underneath the unit, make sure that the foundation will not block the piping access holes.
Also, make sure the foundation is at least 100 mm high so that the piping can pass under the unit.

≤ 30 mm

A: M10 anchor bolt (field supply)

B

A

C

≤ 30 mm

A

B

B: Corner is not seated.
C: Detachable leg
D: Screws

D

MEES19K001

28

4. System Design

4. System Design

4-1. Water Pipe Installation

4-1-1. Schematic Piping Diagram and Piping System Components

indicates the direction of the water flow.

Heat pump unit

QAHV-N-YA-HPB

2

T

1

6

T

2

1

7

3

4

P

5

P

3

5

4

10

8

9

11

Water piping diagram

1

Union joints/flange joints

2

Thermometer

Water pressure gauge

3

4

Valve

5

Flexible joint

Drain pipe

6

7

Strainer

8

Air vent valve

9

Water pipe

10

Drain valve Install drain valves so that water can be drained for servicing.

11

Expansion tank

Required to allow for a replacement of equipment.

Required to check the performance and monitor the operation of the units.

Recommended for checking the operation status.

Required to allow for a replacement or cleaning of the flow adjuster.

Recommended to prevent the noise and vibration from the pump from being transmitted.

Install the drain pipe with a downward inclination of between 1/100 and 1/200. To
prevent drain water from freezing in winter, install the drain pipe as steep an angle as
practically possible and minimize the straight line.
For cold climate installation, take an appropriate measure (e.g., drain heater) to prevent
the drain water from freezing.

Install a strainer near the unit to keep foreign materials from entering the water-side
head exchanger (supplied).

Install air venting valves to the places where air can accumulate.
Automatic air vent valves are effective.

Use pipes that allow for easy air purging, and provide adequate insulation.

Select an expansion tank that is suitable for the system.

To storage tank

From storage tank

* Installing a freezing prevention heater

(1) In cold areas (where the outside temperature drops below freezing), provide a freezing prevention heater at all local

pipes to prevent spontaneous freezing.

(2) After the heater is installed, check outside temperature +25ºC is ensured at the EcoCute inlet/outlet pipe joint section

(at outside temperature -25ºC, joint section 0ºC or higher).

(3) Depending on the local piping material, prevent overheating by selecting a self temperature adjustment type heater or

other method.

Heater installation example

Heater

Piping

Joint section 0ºC
or higher

Piping

Heater

250 mm

Tape

Heat insulator

MEES19K001

29

4. System Design

* 3-way valve installation

Please connect 3-way valve on the lower part of the storage tank except when the unit is in operation.
Anti-freezing operation will keep the water in the tank circulated and water storage tanks can become thermally stratified.

QAHV-N-YA-HPB

: Anti-freezing operation
Residual running of the pump

: Hot water storage operation

3-way valve
(field supply)

MEES19K001

30

4. System Design

4-1-2. Notes on pipe Corrosion

Water treatment and water quality control

Poor-quality circulating water can cause the water-side heat exchanger to scale up or corrode, reducing heat exchange
performance. Properly control the quality of the circulating water.

Removing foreign objects and impurities in the pipes

During installation, keep foreign objects, such as welding and sealant fragments and rust, out of the pipes.

Water Quality Control

(1) Poor-quality water can corrode or scale up the heat exchanger. Regular water treatment is recommended.

Water circulation systems using open heat storage tanks are particularly prone to corrosion.
When using an open heat storage tank, install a water-to-water heat exchanger, and use a closed-loop circuit on the
air-conditioner side. If a water supply tank is installed, keep contact with air to a minimum, and keep the level of
dissolved oxygen in the water no higher than 1 mg/ℓ.

(2) Water quality standard

Higher mid-range temperature Make-up water criteria

Items

pH (25°C) 6.5 ~ 8.0 6.5 ~ 8.0

Electric conductivity (mS/m) (25°C) 30 or less 30 or less

(µs/cm) (25°C) [300 or less] [300 or less]

-

Chloride ion (mg Cl

Standard
items

Reference
items

Reference: Guideline of Water Quality for Refrigeration and Air Conditioning Equipment. (JRA GL02E-1994)

Sulfate ion (mg SO42-/ℓ) 30 or less 30 or less

Acid consumption

(pH4.8) (mg CaCO3/ℓ)

Calcium hardness (mg CaCO

Ionic silica (mg SiO

Iron (mg Fe/ℓ) 0.3 or less 0.3 or less

Copper (mg Cu/ℓ) 0.1 or less 0.1 or less

Sulfide ion (mg S2-/ℓ) Not to be detected Not to be detected

Ammonium ion (mg NH

Residual chlorine (mg Cl/ ℓ) 0.1 or less 0.1 or less

Free carbon dioxide (mg CO2/ℓ) 10.0 or less 10.0 or less

/ℓ) 30 or less 30 or less

/ℓ)

3

/ℓ) 30 or less 30 or less

2

+

/ℓ) 0.1 or less 0.1 or less

4

Water Temp. > 60°C Water Temp. > 60°C

Recirculating water Recirculating water Corrosive Scale-forming

50 or less 50 or less

6.5 ≤ pH ≤ 7.5: 90 or less

7.5 ≤ pH ≤ 8.0: 50 or less

250 or less

Tendencywater system (with secondary side control enabled)

OO

OO

O

O

OO

O

O

O

O

O

QAHV-N-YA-HPB

O

O

O

(3) Please consult with a water quality control specialist about water quality control methods and water quality

calculations before using anti-corrosive solutions for water quality management.

(4) When replacing an air conditioner (including when only the heat exchanger is replaced), first analyze the water

quality and check for possible corrosion.
Corrosion can occur in water systems in which there has been no signs of corrosion. If the water quality level has
dropped, adjust the water quality before replacing the unit.

(5) Suspended solids in the water

Sand, pebbles, suspended solids, and corrosion products in water can damage the heating surface of the heat
exchanger and cause corrosion. Install a good quality strainer (60 mesh or better) at the inlet of the unit to filter out
suspended solids.

(6) Connecting pipes made from different materials

If different types of metals are placed in direct contact with each other, the contact surface will corrode.
Install an insulating material between pipes that are made of different materials to keep them out of direct contact with
each other.

MEES19K001

31

4. System Design

4-1-3. Pipe gradient and air venting valve (Outlet hot water pipe)

During the hot water storage operation, the air dissolved in the water is discharged in the form of bubbling from the outlet
hot water pipe to quickly raise low-temperature water to the required temperature. When the air accumulates in the pipe,
the resistance of the water circuit will increase and the flow rate will extremely decrease. Because of this, an installation of
automatic air venting valves is required when there is a pipe that slopes down in the outlet hot water pipe.
Install the pipe with an upward gradient of 1/200 or more toward the air vent to prevent air accumulation in the pipe.Also,
install air venting valves to the places where air can accumulate. The installation example is shown below.

QAHV-N-YA-HPB

If the crosscut pipe is located lower than the hot water outlet of the heat pump unit, raise the pipe near the unit and install

an automatic air venting valve.

Automatic air venting valve

Automatic air venting valve

Heat pump unit



Upward gradient 1/200

Air separator

Base



Air venting valve installation example

4-1-4. Outlet check valve (When installing multiple units)

When connecting multiple units with pipes in parallel, install a check valve at the outlet pipe of each unit. If a check valve is
not installed, a circuit in which warm water flows back will be created in some units during the defrost cycle or abnormal
stop, and other units will come to an abnormal stop due to sudden change of the inlet water temperature.

4-1-5. Water Pipe Hole Size and Location

Automatic air
venting valve

Hot water outlet

Crosscut pipe

Hot water outlet
(Bronze Rc3/4, female screw)

85 9085

274

297

Water inlet
(Bronze Rc3/4, female screw)

206

122

199

Service panel

19

9

26 5454 26

755

Front view Side view

MEES19K001

32

4. System Design

4-2. QAHV Secondary side control

4-2-1. General description and purpose of secondary side control

Secondary side control is a control method to raise the hot water temperature in the tank by using another heat exchanger

added between the tank and the existing heat exchanger.
By incorporating the secondary side control to the QAHV, the need to assemble a pump control on-site is eliminated, and
the system construction in cases where water exceeding the QAHV water quality standard is used is now easier.

(1) System diagram

Secondary side control system

[2] Secondary side circuit [3] Hot water supply circuit[1] Unit heating circuit

Temperature sensor

T

Flow sensor

System overview
The system using the secondary side control is roughly split into the following three elements: [1] Unit heating circuit, [2]

Secondary side circuit, and [3] Hot water supply circuit. The hot water heated in the unit heating circuit [1] and the cold
water from the lower section of the tank are heat-exchanged in the secondary side circuit [2], and then the high-tempera­ture water flows into the hot water storage tank. The heated hot water in the hot water storage tank is supplied to the
customer via the hot water supply circuit [3].

QAHV-N-YA-HPB

Control target

Based on the data of the flow rate sensor and temperature thermistor installed on the secondary side, the output of
secondary side pump is adjusted by QAHV (adjusts by 0-10 V output).

Purpose

Adjusting the pump output on the secondary side maintains the target outlet hot water temp. and prevents acute rising
of water inlet temp. to QAHV.

Overview on pump operation in different operation modes (○: operated, ×: stopped)

Operation modes Primary side Secondary side

Hot water storage mode

Defrost operation mode

Anti freezing operation

At the end of hot water storage mode, before and after defrost operation (*)

○○

××

○○
○○

(2) Difference between systems with and without secondary side control

Without secondary side control

Unit Tank Unit

Diagram

With secondary side control

Secondary side
heat exchanger

Tank

MEES19K001

Water quality standard
Calcium hardness (mg CaCO3/ℓ)

Hot water supply temperature range

Control target

6.5 ≤ pH ≤ 7.5: 90 or less

7.5 ≤ pH ≤ 8.0: 50 or less

55-90°C

Unit

pH ≤ 250 or less

Unit: 55-90°C
Secondary side: 55-80°C

Unit, secondary side pump, and

secondary side flow adjusting device

33

4. System Design

4-2-2. Schematic Piping Diagram and Piping System Components

Secondary side control system

[2] Secondary side circuit [3] Hot water supply circuit[1] Unit heating circuit

Temperature sensor

T

QAHV-N-YA-HPB

Flow sensor

(1) Notes on configuring and selecting components

1) Points to note for secondary side water piping
[1] Details on components in the unit heating circuit

* For details, refer to page 29.
[2] Details on components in heat exchanger heating circuit
Schematic Piping Diagram and Piping System Components for secondary circuit

No.

Flow sensor

1

(Optional parts)

Temperature

2

sensor
(Optional parts)

Plate heat

3

exchanger

Pump + Flow

4

rate adjustment
device

5

Water piping

Anti-freeze

6

heater

7

Union joint

8

Val ve

9

Strainer

10

Air vent valve

11

Flexible joint

Water pressure

12

gauge

13

Expansion tank

14

Drain valve

15

Safety valve

From heat pump unit

To heat pump unit

Component

3

2

T

7

7

14

Application

Measures and controls
the secondary side flow rate.

Measures and controls
the secondary side outlet
hot water temperature.

Exchanges heat between
hot water output from
the unit and water
input from the tank.

Outputs hot water from
the secondary side and
adjusts the flow rate.

Water flow channel

Prevents pipe damage
due to freezing of the
water circuit.

Improves the workability
of replacing equipment.

Improves the workability
of cleaning the heat
exchanger and
replacing parts.

Prevents foreign
materials from entering
into the heat exchanger.

Bleeds air from the pipe.

Prevents the
propagation of vibration.

Used to check the
operation status.

Absorbs excessive
water pressure due to
expansion caused by a
rise in temperature.

Improves workability of
replacing equipment.

Prevents rupturing of
the water circuit.

14

8

Be sure to install this component between the downstream of the flow rate
adjustment device and the heat exchanger.

Install this component at the outlet of the heat exchanger.

Select a heat exchanger that is appropriate for the capacity.

Select a pump and flow rate adjustment device that are suitable for the system.
Install them at the lower outlet of the tank.

Be sure to perform insulation work.
Select pipes that allow for easy air bleeding.

This component needs to be installed in a location
where an ambient temperature may fall to 0˚C or less.

Install these components in the two places of the chilled water passage section
and the high temperature water passage section to enable replacement.

Install these components in the two places of the chilled water passage section
and the high temperature water passage section to enable replacement.

Install a strainer with 60 mesh or better near the heat exchanger.

Install air vents in places where there is a risk of air accumulating.

These components need to be installed in consideration of the pipe load as
pipes are easily damaged by bending.

Attach this component to each piping section to check the water pressure.

Select an expansion tank that is suitable for the system.

Install these components in the two places of the chilled water passage section
and the high temperature water passage section to enable replacement.

Be sure to provide an escape pipe to prevent discharged water
from spraying on passersby.

12

P

8

12

P

11

15

4

1

P

Remarks and notes on selecting and installing components

10

To storage tank

5 6

From storage tank

9

11

13

5 6

MEES19K001

34

4. System Design

4-2-3. Selection criteria for heat exchanger

Step 1 Determination of prerequisites for selection

1. Heat exchanger capacity 40000 W

2. Estimation of outlet hot water and inlet water temperatures
As a guide, select a heat exchanger of which the temperature difference between the high temperature section
and the low temperature section will be 5°C or below.

2-1. Outlet hot water temperature (when secondary side outlet hot water temperature is set to 65°C (setting at the

time of shipment))

 Secondary side circuit outlet hot water temperature: 65°C
 Unit outlet hot water temperature: 70°C

2-2. Inlet water temperature

 Secondary side inlet water temperature: 10°C
 Unit inlet water temperature: 15°C

3. Used flow rate
(40000 W/(70-15)°C/4200 J/kg•K) × 60 s = 10.4 kg/min ≈ 10.4 ℓ/min

Step 2 Determination of model

Notes on selection

 Select a heat exchanger that allows water to pass through both of the flow channels.
 Select a heat exchanger so that the pressure applied to the heat exchanger in the on-site system will not

exceed the maximum operating pressure of the heat exchanger.

 Select a heat exchanger that allows flowing at a flow rate of maximum 30 ℓ/min.
 Select a heat exchanger with a capacity of at least 40000 W.
 Ensure that the shearing stress at the flow rate to be used will be 16 Pa or more. (Refer to step 4.)

* To increase the shearing stress:

 When the area per plate is equal, select a vertically long heat exchanger.
 Select a heat exchanger of which NTU is high (although the heat transfer capacity improves as NTU

increases, the pressure loss becomes high).

QAHV-N-YA-HPB

Step 3 Determination of specifications of the heat exchanger

Determine the model of heat exchanger and number of plates in consultation with the heat exchanger
manufacturer based on the above requirements.
* To determine the number of plates, calculate the number of plates while referring to the example below.

Values to use when determining the number of plates:

1) Overall heat transfer coefficient of corresponding heat exchanger

2) Heat transfer area per plate

Calculation method

a) Obtain the data of 1) and 2) from the heat exchanger manufacturer.
b) Estimate the number of plates of the heat exchanger.
c) Check that the number of transfer units for the corresponding number of plates matches between NTU1 and

NTU2 (NTU1=NTU2).
If they are matched, select a heat exchanger having the corresponding number of plates. If they are not
matched, change the number of plates and then return to B to perform the calculation again.

∆T1: Temperature difference between inlet and

NTU 1

= NTU 2

ΔT
ΔT

K×A

=

V×C

outlet

∆T: Temperature difference of high temperature

part (low temperature part)

2

K: Overall heat transfer coefficient (W/m

K)

A: Total heat transfer area (m2)
G: Total mass flow rate (kg/s)
C: Specific heat (J/kg•K)

MEES19K001

35

4. System Design

Step 4 Calculation of the shearing stress

Calculate the shearing stress using the following method.
Values required for calculation

 Relationship between flow rate and pressure loss of corresponding heat exchanger (Obtain the data from the

heat exchanger manufacturer.)

Calculation method
Calculate the shearing stress using the following formula.

QAHV-N-YA-HPB

Representative length of 1 channel

Effective length

Front of heat exchanger

Side of heat exchanger

Distance between plates

Effective length:
Length between water inlet and water outlet
(refer to the figure on the right)

Representative length of 1 channel:
Distance between plates
(refer to the figure on the right) × 2

Effective length

∆P: Pressure loss

A shearing stress of 16 Pa or higher is required to reduce the amount of scale that adheres.
If the shearing stress is low:

 Select a vertically short shape.
 Change the shape of the plates.

Reselect a heat exchanger that will increase the shearing stress by following methods described above.

MEES19K001

36

4. System Design

4-2-4. Configuration method and selection criteria of flow rate adjustment device

In this system, a flow rate adjustment device is installed in the secondary side circuit to perform secondary side flow
rate adjustment control by outputting 0 to 10 V from the unit.
* 10-V power supply is not supplied.
The following shows a system configuration example of the flow rate adjustment device and notes on the system
configuration.
The following three system types are recommended as flow rate adjustment devices:

1. System using a three-way valve

2. System using a two-way valve

3. System using an inverter

1. System using a three-way valve

Overview of system

ON/OFF signal

0 to 10 V output

Three-way
valve

Pump

This system has a pump provided at the outlet
of the tank and a three-way valve provided
downstream of the pump, and adjusts the flow
rate by controlling the opening and closing of
the three-way valve.

Flow rate

output device

Pump

Wiring
connection
places

1-3 of CN512 of

control board

(ON/OFF output)

QAHV-N-YA-HPB

Flow rate

adjustment

device

Three-way valve

Sub box

terminal block

No. 10, 11, 12

Notes on selection method and system configuration

Notes on pump selection and connection

 Calculate the total pump head according to the system at the site and then select a pump capable of outputting

the minimum flow rate of about 3 ℓ/min and maximum flow rate of about 30 ℓ/min with the necessary pump
head for the piping at the site.

 When selecting the pump, please note that output at a high flow rate will not occur if the flow rate with the

pump head of the system at the site is low, and output at a low flow rate will not occur if the flow rate is too high.

 Be sure to check that the flow rate becomes 20 to 30 ℓ/min at the maximum output during a flow rate

adjustment test run.

* If the flow rate is not within the range of 20 to 30 ℓ/min, select a different pump or adjust the maximum

frequency using an inverter, etc. so that the maximum flow rate of 20 to 30 ℓ/min is achieved.

* To select a proper pump, first select a pump that supports slightly high flow rate, and then adjust the frequency

with an inverter so that the flow rate becomes 20 to 30 ℓ/min at the maximum output.
(In that case, an inverter is necessary to be prepared separately.)

Notes on three-way valve selection and connection

 Use a valve that is capable of adjusting the flow rate with a 0 to 10 V input.
 Calculate the Cv value and select a valve that supports an appropriate rate.
 Select a valve of which the ratio of the maximum flow rate and the minimum flow rate will be at least 1:10.
 Place the three-way valve downstream of the pump. Connect one outlet to the heat exchanger.

Connect the other outlet to the lower part of the tank.

 Carefully read the instruction manual and use the three-way valve in accordance with the usage procedures.

MEES19K001

37

4. System Design

2. System using a two-way valve

QAHV-N-YA-HPB

ON/OFF signal

Overview of system
This system has a pump provided at the outlet of the

0 to 10 V output

tank and a two-way valve provided downstream of
the pump, and adjusts the flow rate by controlling the
opening and closing of the two-way valve.

Flow rate

output device

Two-way
valve

Notes on pump selection and connection
Select a pump in the same way as for a system with a three-way valve.
Notes on two-way valve selection and connection

 Use a valve that is capable of adjusting the flow rate with a 0 to 10 V input.
 Calculate the Cv value and select a valve that supports an appropriate rate.
 Select a valve of which the ratio of the maximum flow rate and the minimum flow rate will be at least 1:10.
 There are various kinds of two-way valve (such as ball valve, butterfly valve, and globe valve), and there are

valves suitable for flow rate adjustment and valves that are not suitable for flow rate adjustment.
Therefore be sure to select a two-way valve of a kind capable of precisely controlling the flow rate, such as a
butterfly valve or globe valve.

 Place the two-way valve downstream of the pump.
 Carefully read the instruction manual and use the two-way valve in accordance with the usage procedures.

Pump

Wiring
connection
places

Pump

1-3 of CN512 of

control board

(ON/OFF output)

Flow rate

adjustment device

Two-way valve

Sub box

terminal block

No. 10, 11, 12

3. System using an inverter

Overview of system
This system has a pump provided at the outlet

0 to 10 V output

Pump

Inverter

Notes on pump selection and connection
Select a pump in basically the same way as for a system with a three-way valve or two-way valve.

 Select a pump that can be used also at a low frequency (6 Hz or less).

(The motor may be seized depending on the pump selected as this control is performed at a low frequency.)

 Select a pump of which flow rate at 100% output is between 20 to 30 ℓ/min.

Notes on inverter selection and connection

 The inverter needs to be able to adjust output with a 0 to 10 input.
 Select an inverter that will not cause the seizing of the motor.
 Configure the settings so that the flow rate on the secondary side will become 0 ℓ/min when the unit is not

operating.

 Carefully read the instruction manual and use the inverter in accordance with the usage procedures.

of the tank and an inverter connected to the
pump, and adjusts the flow rate by changing
the frequency of the inverter.

Wiring
connection
places

Flow rate

output

device

Pump

-

Flow rate

adjustment

device

Inverter

Sub box
terminal block
No. 10, 11, 12

MEES19K001

38

4. System Design

4-2-5. When connecting multiple units

To connect multiple units, configure one secondary side circuit system for each unit as shown in the figure below.

(Install a heat exchanger, flow sensor, and thermistor for each unit.)

QAHV-N560YA-HPB

QAHV-N560YA-HPB

Storage tank

QAHV-N560YA-HPB

QAHV-N560YA-HPB

Storage tank

QAHV-N-YA-HPB

MEES19K001

39

5. Wiring Design

5. Wiring Design

5-1. System Configurations

1. Types of control cables

Remote controller cable

QAHV-N-YA-HPB

Control
cable
wiring

*1. Use a CVVS or CPEVS cable (Max. total length of 200 m) if there is a source of electrical interference near by (e.g., factory) or the total length of control

*2. When the wiring length exceeds 10 m, use wire of 1.25 mm².

2. System Configuration
(1) Individual system

M-NET cable between units *1

External input wire size Min. 0.3 mm²

External output wire size 1.25 mm²

wiring exceeds 120 m.

* Each unit is operated individually by connecting a dry contact switch/relay to each unit.

Size 0.3 - 1.25 mm² (Max. 200 m total) *2

Recommended cable types CVV

Size More than 1.25 mm² (Max. 120 m total)

Recommended cable types Shielding wire CVVS, CPEVS or MVVS

External

temperature

sensor

Field-supplied dry contact
switch/relay or remote
controller (PAR-W31MAA) or
centralized controller (AE-200)

Unit (MAIN circuit)

PCB PCB

External

temperature

sensor

Field-supplied dry contact
switch/relay or remote
controller (PAR-W31MAA) or
centralized controller (AE-200)

Unit (MAIN circuit)

(2) Multiple system (2-16 units)

* A group of unit that consists of one main unit and up to 15 sub units is operated collectively by connecting an external

water temperature sensor and a dry contact switch/relay to the main unit.

External

temperature

sensor

Field-supplied dry contact
switch/relay or remote
controller (PAR-W31MAA) or
centralized controller (AE-200)

Unit (MAIN circuit)

PCB PCB PCB

MAIN unit

Inter-unit wiring

(M-NET line)

Unit (MAIN circuit) Unit (MAIN circuit)

SUB unit

Inter-unit wiring

(M-NET line)

SUB unit(s)

n units

MEES19K001

40

5. Wiring Design

5-2. Electrical Wiring Installation

5-2-1. Main Power Supply Wiring and Switch Capacity

Schematic Drawing of Wiring (Example)

<A> Switch (with current breaking capability)

<B> Current leakage breaker

<C> Outdoor unit

3N~380–415V

1

, L2, L3, N

L

<A><B>

<C>

PE

Main power supply wire size, switch capacities, and system impedance

Model

QAHV-N560YA-HPB 10 - 10 63 A 100 mA 0.1 sec. or less 63 63 63 0.21 Ω

1) Use a dedicated power supply for each unit. Ensure that each unit is wired individually.

2) When installing wiring, consider ambient conditions (e.g., temperature, sunlight, rain).

3) The wire size is the minimum value for metal conduit wiring. If voltage drop is a problem, use a wire that is one size thicker.
Make sure the power-supply voltage does not drop more than 10%.

4) Specific wiring requirements should adhere to the wiring regulations of the region.

5) Power supply cords of appliances for outdoor use shall not be lighter than polychloroprene sheathed flexible cord (design 60245 IEC57).

6) A switch with at least 3 mm contact separation in each pole shall be provided by the Air Conditioner installer.

7) Do not install a phase advancing capacitor on the motor. Doing so may damage the capacitor and result in fire.

Be sure to use specified wires and ensure no external force is imparted to terminal connections.



Loose connections may cause overheating and fire.

Be sure to use the appropriate type of overcurrent protection switch. Note that overcurrent may include direct current.



Minimum wire thickness (mm²)

Main cable Branch Ground Capacity Fuse

Current leakage breaker

Local switch (A)

No-fuse breaker

(A)

Max. Permissive

System Impedance

QAHV-N-YA-HPB

Some installation sites may require an installation of an earth leakage breaker for the inverter. If no earth leakage breaker is installed,



there is a danger of electric shock.

Only use properly rated breakers and fuses. Using a fuse or wire of the wrong capacity may cause malfunction or fire.



This device is intended for the connection to a power supply system with a maximum permissible system impedance shown in the above



table at the interface point (power service box) of the user’s supply.

Ensure that this device is connected only to a power supply system that fulfills the requirements above.



If necessary, consult the public power supply company for the system impedance at the interface point.

This equipment complies with IEC 61000-3-12 provided that the short-circuit power Ssc is greater than or equal to Ssc (*2) at the



interface point between the user’s supply and the public system. It is the responsibility of the installer or user of the equipment to ensure,
in consultation with the distribution network operator if necessary, that the equipment is connected only to a supply with a short-circuit
power Ssc greater than or equal to Ssc (*2).

Ssc(*2)

Ssc (MVA)

2.62 Ω

MEES19K001

41

5. Wiring Design

5-2-2. Cable Connections

1. Schematic Diagram of a Unit and Terminal Block Arrangement

To remove the front panel of the control box, unscrew the four screws and pull the panel forward and then down.

QAHV-N-YA-HPB

Control terminal block

Power supply
terminal block

Cable strap

Power wire

Transmission cable

Cable strap

Transmission cablePower wire

Fix in place with a cable tie.

Important: Power supply cables larger than 25 mm2 in diameter are not connectable to the power supply terminal block

(TB2). Use a pull box to connect them.

2. Installing the conduit tube

Punch out the knockout hole for wire routing at the bottom of the front panel

with a hammer.

When putting wires through knockout holes without protecting them with a

Knockout hole

conduit tube, deburr the holes and protect the wires with protective tape.

If damage from animals is a concern, use a conduit tube to narrow the

opening.

Burr

MEES19K001

42

5. Wiring Design

Note:

• Make sure the cables are not coming out of the rubber bushing cut.

Top view

Cut

Rubber bushing
(oval part)

Rubber bushing
(oval part)

Cables are coming out of the rubber bushing.

Wiring

Cross-sectional view

Top view

Wiring

Rubber bushing

Wiring

• When threading the wiring through the rubber bushing, make sure the rubber bushing will not come off
the sheet metal on the control box guard.

QAHV-N-YA-HPB

Sheet metal on
the guard

Rubber bushing Rubber bushing

Sheet metal on
the guard

• When tying the supplied tie band around the rubber bushing, make sure to leave no gap between the ends.

<<Important>>

Tie band

Overlapped
rubber bushing

Approx. 20 mm (13/16 in)

Cut on the
rubber bushing

There is a gap in
the rubber
bushing.

Cut on the
rubber
bushing

When putting the tie band on the rubber bushing,
make sure the ends of the rubber bushing overlap
each other as shown in the figure at left.
* If there is a gap, water from snow or rain may enter,
resulting in equipment damage.

A power wire exceeding the specified power wire thickness cannot be connected to the power terminal
block (TB2).
Use a separate pull box.
To ensure that the transmission cable is not affected by electrical noise from the power cable, route the
power cable away from the transmission cable (distance of at least 5 cm).

MEES19K001

43

6. Controller

Item Description Operations Display

ON/OFF

Runs and stops the operation of a group of units

Operation mode switching

Switches between Mode 1/Mode 2/Mode 3
* Available operation modes vary depending on the unit to be connected.
* Switching limit setting can be made via a remote controller.

Water temperature setting

Temperature can be set within the ranges below. (in increments of 0.5°C or 0.5°F)
40°C ~ 90°C

* The settable range varies depending on the unit to be connected.

Water temperature display

10°C ~ 90°C
(in increments of 0.5°C or 0.5°F)
* The settable range varies depending on the unit to be connected.

Permit/Prohibit

local operation

Individually prohibits operations of each local remote control function: ON/OFF,
Operation modes, water temperature setting, Circulating water replacement warning
reset.
* Upper level controller may not be connected depending on the unit to be connected.

Weekly scheduler

ON/OFF/Water temperature setting can be done up to 8 times one day in the week.
(in increments of a minute)

Error

When an error is currently occurring on a unit, the afflicted unit and the error code are
displayed.

Self check (Error history)

Searches the latest error history by selecting "CHECK" from the Main menu.

LANGUAGE setting

The language on the dot matrix LCD can be changed. (11 languages)
English/French/German/Swedish/Spanish/Italian/Danish/Dutch/Finnish
/Norwegian/Portuguese

(Front view) (Side view) (Rear view)

Unit: mm

120

46

19

83.5

120

6. Controller

6-1. PAR-W31MAA specifications

QAHV-N-YA-HPB

MEES19K001

44

MEES19K001

Warning

■

Do not use refrigerant other than the type indicated in the manuals provided with the unit and on the nameplate.

- Doing so may cause the unit or pipes to burst, or result in explosion or fire during use, repair, or at the time of disposal of the unit.

- It may also be in violation of applicable laws.

- MITSUBISHI ELECTRIC CORPORATION cannot be held responsible for malfunctions or accidents resulting from the use of the wrong
type of refrigerant.

New publication effective Aug. 2019

Specifications subject to change without notice