Daikin EKHBHE008BA3V3, EKHBXE008BA3V3 Installation manuals

INSTALLATION MANUAL

Indoor unit for air to water heat pump system

For installation WITHOUT restricted power supply condition

>6 kW

EKHBHE008BA3V3 EKHBXE008BA3V3

12 3 45

2x2x1x 1x 1x

260

T T

1" MB

895

90°

922

30°

830

B B

469

361

2 3

4 5

■

ONTENTS

EKHBHE008BA*** EKHBXE008BA***

Indoor unit for air to water heat pump system

age

Introduction........................................................................................ 1

General information ...................................................................................1

Scope of this manual .................................................................................2

Model identiﬁcation ....................................................................................2

Accessories .......................................................................................2

Accessories supplied with the indoor unit..................................................2

Safety considerations ........................................................................3

Typical application examples.............................................................4

Application 1 ..............................................................................................4

Application 2 ..............................................................................................4

Application 3 ..............................................................................................5

Application 4 ..............................................................................................5

Application 5 ..............................................................................................6

Application 6 ..............................................................................................8

Overview of the indoor unit................................................................ 9

Opening the indoor unit.............................................................................. 9

Main components..................................................................................... 10

Switch box main components ..................................................................11

Functional diagram ..................................................................................11

Installation of the indoor unit............................................................12

Selecting an installation location.............................................................. 12

Dimensions and service space ................................................................12

Inspecting, handling and unpacking the unit............................................ 12

Mounting the indoor unit ..........................................................................13

Installation of the EKHBDP drain pan kit (only for EKHBX models).........13

Refrigerant pipework................................................................................ 13

Water pipework........................................................................................14

Charging water......................................................................................... 16

Piping insulation....................................................................................... 16

Field wiring............................................................................................... 16

Start-up and conﬁguration ...............................................................20

DIP switch settings overview....................................................................20

Room thermostat installation conﬁguration.............................................. 20

Pump operation conﬁguration..................................................................21

Domestic hot water tank installation conﬁguration................................... 21

Initial start-up at low outdoor ambient temperatures................................ 21

Pre-operation checks...............................................................................21

Powering up the indoor unit ..................................................................... 22

Setting the pump speed...........................................................................22

Field settings............................................................................................ 22

Field settings table...................................................................................31

Test run and ﬁnal check...................................................................33

Final check............................................................................................... 33

Test run operation (manual) ..................................................................... 33

Maintenance and service ................................................................33

Troubleshooting ...............................................................................34

General guidelines................................................................................... 34

General symptoms................................................................................... 35

Error codes ..............................................................................................36

Technical speciﬁcations................................................................... 38

General ....................................................................................................38

Electrical speciﬁcations............................................................................ 38

Installation manual

READ THESE INSTRUCTIONS CAREFULLY BEFORE INSTALLATION. KEEP THIS MANUAL IN A HANDY PLACE FOR FUTURE REFERENCE.

IMPROPER INSTALLATION OR ATTACHMENT OF EQUIPMENT OR ACCESSORIES COULD RESULT IN ELECTRIC SHOCK, SHORT-CIRCUIT, LEAKS, FIRE OR OTHER DAMAGE TO THE EQUIPMENT. BE SURE ONLY TO USE ACCESSORIES MADE BY DAIKIN WHICH ARE SPECIFICALLY DESIGNED FOR USE WITH THE EQUIPMENT AND HAVE THEM INSTALLED BY A PROFESSIONAL.

ALL ACTIVITIES DESCRIBED IN THIS MANUAL SHALL BE CARRIED OUT BY A LICENSED TECHNICIAN.

BE SURE TO WEAR ADEQUATE PERSONEL PROTECTION EQUIPMENT (PROTECTION GLOVES, SAFETY GLASSES, ...) WHEN PERFORMING INSTALLATION, MAINTENANCE OR SERVICE TO THE UNIT.

IF UNSURE OF INSTALLATION PROCEDURES OR USE, ALWAYS CONTACT YOUR DAIKIN DEALER FOR ADVICE AND INFORMATION.

THE UNIT DESCRIBED IN THIS MANUAL IS DESIGNED FOR INDOOR INSTALLATION ONLY AND FOR AMBIENT TEMPERATURES RANGING 4°C~35°C.

The English text is the original instruction. Other languages are translations of the original instructions.

NTRODUCTION

General information

Thank you for purchasing this indoor unit. The unit is the indoor part of the air to water ERHQ or ERLQ heat

pumps. These units are designed for wall mounted indoor installation. See "Selecting an installation location" on page 12. The units can be combined with Daikin fan coil units, ﬂoor heating applications, low temperature radiators, Daikin domestic water heating applications and Daikin solar kit for domestic hot water applications.

Heating/cooling units and heating only units

The unit range consists of two main versions: a heating/cooling (EKHBX) version and a heating only (EKHBH) version.

Both versions are delivered with an integrated backup heater for additional heating capacity during cold outdoor temperatures. The backup heater also serves as a backup in case of malfunctioning of the outdoor unit.

Backup heater

Indoor unit model Backup heater capacity

EKHB*E008BA3V3

3 kW 1x 230 V

nominal voltage

EKHBH/XE008BA

Indoor unit for air to water heat pump system

4PW56303-1A

NOTE

An ERLQ0* BA outdoor unit can only be connected to an EKHBH/XE008 BA indoor unit (bottom plate heater at outdoor unit has to be controlled by indoor unit).

An ERHQ0* BA outdoor unit can be connected to an EKHBH/XE008 BA indoor unit or to an EKHBH/XE008 AA indoor unit (if a bottom plate heater kit is required, see "Possible options" on

page 2).

Installation manual

■

The heat pump unit is preset to a restricted power supply condition mode. The information in this manual is only valid in case the power supply condition is not restricted. Refer to the chapter "Field settings" on page 22 on how to disable the restricted power supply condition mode [D-02].

Heat pump capacity Required heating capacity (site dependent) Additional heating capacity provided by the backup heater Equilibriumtemperature (can be set through the user interface,

refer to "Field settings" on page 22)

Ambient (outdoor) temperature

Heating capacity

Domestic hot water tank (option)

An optional EKHW* domestic hot water tank with integrated 3 kW electrical booster heater can be connected to the indoor unit. The domestic hot water tank is available in three sizes: 150, 200 and 300 litre. Refer to the domestic hot water tank installation manual for further details.

Drain pan kit (option)

For heating/cooling versions (EKHBX), it is necessary to install the EKHBDP drain pan kit. For more information concerning the drain pan kit, refer to

"Installation of the EKHBDP drain pan kit (only for EKHBX models)" on page 13.

Solar kit for domestic hot water tank (option)

For information concerning the EKSOLHW solar kit, refer to the installation manual of that kit.

Digital I/O PCB kit (option)

An optional EKRP1HB digital I/O PCB can be connected to the indoor unit and allows:

remote alarm output heating/cooling ON/OFF output bivalent operation (permission signal for the auxiliary boiler)

Refer to the operation manual of the indoor unit and to the installation manual of the digital I/O PCB for more information.

Refer to the wiring diagram or connection diagram for connecting this PCB to the unit.

Remote thermostat kit (option)

An optional room thermostat EKRTW, EKRTWA, or EKRTR can be connected to the indoor unit. Refer to the installation manual of the room thermostat for more information.

Possible options

EKBPHT08 EKBPHT08BA

EKHBH/XE008 AA EKHBH/XE008 BA

Possible Not allowed Possible Possible

Scope of this manual

This installation manual describes the procedures for handling, installing and connecting all EKHBH/X indoor unit models.

NOTE

Installation of the ERHQ or ERLQ heat pump outdoor unit is described in the outdoor unit installation manual.

Operation of the indoor unit is described in the indoor unit operation manual.

Model identiﬁcation

Indoor unit

EK HB XE 008 AA 3 V3

Backup heater nominal voltage: V3 = 1P, 230 V

Backup heater capacity (kW)

Series

Indication of heating/cooling capacity (kW)

XE = heating and cooling, HE = heating only

Hydro box

European kit

(a) For exact values, refer to "Technical speciﬁcations" on page 38.

(a)

Drain pan kit (optional)

EK HB DP 150

Drain pan

Hydro box

European kit

CCESSORIES

Accessories supplied with the indoor unit

See ﬁgure 1

Installation manual Operation manual Shut-off valve Wiring diagram sticker (inside indoor unit cover) Indoor unit cover ﬁxing screw

Installation manual

Indoor unit for air to water heat pump system

EKHBH/XE008BA

4PW56303-1A

■

AFETY

The precautions listed here are divided into the following two types. Both cover very important topics, so be sure to follow them carefully.

Meanings of DANGER , WARNING , CAUTION and NOTE symbols.

CONSIDERATIONS

DANGER

Indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury.

WARNING

Indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury.

CAUTION

Indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury. It may also be used to alert against unsafe practices.

NOTE

Indicates situations that may result in equipment or property-damage accidents only.

Danger

Before touching electric terminal parts, turn off power switch. When service panels are removed, live parts can be easily

touched by accident. Never leave the unit unattended during installation or servicing

when the service panel is removed. Do not touch water pipes during and immediately after operation

as the pipes may be hot. Your hand may suffer burns. To avoid injury, give the piping time to return to normal temperature or be sure to wear proper gloves.

Do not touch any switch with wet ﬁngers. Touching a switch with wet ﬁngers can cause electrical shock.

Before touching electrical parts, turn off all applicable power supply.

Warning

Tear apart and throw away plastic packaging bags so that children will not play with them.

Children playing with plastic bags face danger of death by suffocation.

Safely dispose of packing materials. Packing materials, such as nails and other metal or wooden parts, may cause stabs or other injuries.

Never directly touch any accidental leaking refrigerant. This could result in severe wounds caused by frostbite.

Do not touch the refrigerant pipes during and immediately after operation as the refrigerant pipes may be hot or cold, depending on the condition of the refrigerant ﬂowing through the refrigerant piping, compressor, and other refrigerant cycle parts. Your hands may suffer burns or frostbite if you touch the refrigerant pipes. To avoid injury, give the pipes time to return to normal temperature or, if you must touch them, be sure to wear proper gloves.

Do not touch the internal parts (pump, backup heater, etc.) during and immediately after operation.

Your hands may suffer burns if you touch the internal parts. To avoid injury, give the internal parts time to return to normal temperature or, if you must touch them, be sure to wear proper gloves.

Caution

Earth the unit. Earthing resistance should be according to local and national

regulations. Do not connect the earth wire to gas or water pipes,

lightning conductor or telephone earth wire. Incomplete earthing may cause electric shocks.

Gas pipe. Ignition or explosion may occur if the gas leaks.

Water pipe. Hard vinyl tubes are not effective earths.

Lightning conductor or telephone earth wire. Electric potential may rise abnormally if struck by a lightning bolt.

Install the power wire at least 1 meter away from televisions or radios to prevent image interference or noise.

(Depending on the radio waves, a distance of 1 meter may not be sufﬁcient to eliminate the noise.)

Do not rinse the unit. This may cause electric shocks or ﬁre. Do not install the unit in places such as the following:

Where there is mist of mineral oil, oil spray or vapour. Plastic parts may deteriorate, and cause them to fall out or water to leak.

Where corrosive gas, such as sulphurous acid gas, is produced. Corrosion of copper pipes or soldered parts may cause the refrigerant to leak.

Where there is machinery which emits electromagnetic waves. Electromagnetic waves may disturb the control system, and cause malfunction of the equipment.

Where ﬂammable gases may leak, where carbon ﬁbre or ignitable dust is suspended in the air or where volatile ﬂammables, such as thinner or gasoline, are handled. Such gases may cause a ﬁre.

Where the air contains high levels of salt. Where voltage ﬂuctuates a lot, such as that in factories. In vehicles or vessels. Where acidic or alkaline vapour is present.

EKHBH/XE008BA

Indoor unit for air to water heat pump system

4PW56303-1A

Installation manual

YPICAL

APPLICATION

EXAMPLES

Application 2

The application examples given below are for illustration purposes only.

Application 1

Space heating only application with the room thermostat connected to the indoor unit.

5 64321

Outdoor unit Indoor unit Heat exchanger Pump Shut-off valve

FHL1..3 Floor heating loop

Pump operation and space heating

When the room thermostat (T) is connected to the indoor unit, the pump (4) will operate when there is a heating request from the room thermostat, and the outdoor unit will start operating to achieve the target leaving water temperature as set on the user interface.

When the room temperature is above the thermostat set point, the outdoor unit and pump will stop operating.

Make sure to connect the thermostat wires to the correct terminals (see "Connection of the thermostat cable" on

page 18) and to conﬁgure the DIP switch toggle switches

correctly (see "Room thermostat installation conﬁguration"

on page 20).

FHL1

FHL2

FHL3

Collector (ﬁeld supply) Shut-off valve

Room thermostat (optional)

Space heating only application without room thermostat connected to the indoor unit. The temperature in each room is controlled by a valve on each water circuit. Domestic hot water is provided through the domestic hot water tank which is connected to the indoor unit.

54321

8 6

T2M3T3

121011

1 Outdoor unit 10 Domestic hot water tank 2 Indoor unit 3 Heat exchanger 11 Booster heater 4 Pump 12 Heat exchanger coil 5 Shut-off valve FHL1..3 Floor heating loop 6 Collector (ﬁeld supply) T1..3 Individual room 7 Shut-off valve 8 Motorised 3-way valve

(delivered with domestic hot water tank)

9 By-pass valve

(ﬁeld supply)

FHL1

FHL2

(optional)

thermostat (optional)

M1..3 Individual motorised

valve to control loop FHL1 (ﬁeld supply)

FHL3

Pump operation

With no thermostat connected to the indoor unit (2), the pump (4) can be conﬁgured to operate either as long as the indoor unit is on, or until the required water temperature is reached.

NOTE

Details on pump conﬁguration can be found under

"Pump operation conﬁguration" on page 21.

Installation manual

Space heating

The outdoor unit (1) will operate to achieve the target leaving water temperature as set on the user interface.

NOTE

When circulation in each space heating loop (FHL1..3) is controlled by remotely controlled valves (M1..3), it is important to provide a by-pass valve (9) to avoid the ﬂow switch safety device from being activated.

The by-pass valve should be selected as such that at all time the minimum water ﬂow as mentioned under

"Water pipework" on page 14 is guaranteed.

It is recommended to select a pressure difference controlled by-pass valve.

Indoor unit for air to water heat pump system

EKHBH/XE008BA

4PW56303-1A

Domestic water heating

When domestic water heating mode is enabled (either manually by the user, or automatically through a schedule timer) the target domestic hot water temperature will be achieved by a combination of the heat exchanger coil and the electrical booster heater.

When the domestic hot water temperature is below the user conﬁgured set point, the 3-way valve will be activated to heat the domestic hot water by means of the heat pump. In case of large domestic hot water demand or a high domestic hot water temperature setting, the booster heater (11) can provide auxiliary heating.

NOTE

The indoor unit can be conﬁgured so that at low outdoor temperatures the domestic hot water is exclusively heated by the booster heater. This assures that the full capacity of the heat pump is available for space heating.

Details on domestic hot water tank conﬁguration for low outdoor temperatures can be found under "Field

settings" on page 22, ﬁeld settings [5-02] to [5-04].

Application 3

Space cooling and heating application with the room thermostat set for heating/cooling connected to the indoor unit. Heating is provided

through ﬂoor heating loops and fan coil units. Cooling is provided through the fan coil units only. Domestic hot water is provided through the domestic hot water tank which is connected to the indoor unit.

Pump operation and space heating and cooling

According to the season, the customer will select cooling or heating on the room thermostat (T). This selection is not possible by operating the user interface.

When space heating/cooling is requested by the room thermostat (T), the pump will start operating and the indoor unit (2) will switch to "heating mode"/"cooling mode". The outdoor unit (1) will start operating to achieve the target leaving hot/cold water temperature.

In case of cooling mode, the 2-way valve (13) will close as to prevent cold water running through the ﬂoor heating loops (FHL).

NOTE

Make sure to connect the thermostat wires to the correct terminals (see "Connection of the thermostat

cable" on page 18) and to conﬁgure the DIP switch

toggle switches correctly (see "Room thermostat

installation conﬁguration" on page 20).

NOTE

Wiring of the 2-way valve (13) is different for a NC (normal closed) valve and a NO (normal open) valve! Make sure to connect to the correct terminal numbers as detailed on the wiring diagram.

The ON/OFF setting of the heating/cooling operation is done by the room thermostat and cannot be done by the user interface on the indoor unit.

Domestic water heating

Domestic water heating is as described under "Application 2" on

page 4.

54321

8 13

M M

1 Outdoor unit 10 Domestic hot water tank 2 Indoor unit 3 Heat exchanger 11 Booster heater 4 Pump 12 Heat exchanger coil 5 Shut-off valve 13 Motorised 2-way valve 6 Collector (ﬁeld supply) 7 Shut-off valve FCU1..3 Fan coil unit (optional) 8 Motorised 3-way valve

(delivered with domestic hot water tank)

11 12

FHL1..3 Floor heating loop

T Room thermostat with

FCU1

FCU2

FCU3

FHL1

FHL2

FHL3

(optional)

(ﬁeld supply)

heating/cooling switch (optional

Application 4

Space cooling and heating application without the room thermostat connected to the indoor unit, but with the heating only room

thermostat (set heating only) controlling the ﬂoor heating and the heating/cooling thermostat (set heating/cooling) controlling the fan coil units. Heating is provided through ﬂoor heating loops and fan coil units. Cooling is provided through the fan coil units only.

FCU2

FHL2

FCU3

FHL3

FCU1

54321

13M14

FHL1

EKHBH/XE008BA

Indoor unit for air to water heat pump system

4PW56303-1A

Installation manual

1 Outdoor unit 14 Motorised 2-way valve for 2 Indoor unit 3 Heat exchanger 4 Pump FCU1..3 Fan coil unit with 5 Shut-off valve 6 Collector (ﬁeld supply) FHL1..3 Floor heating loop 7 Shut-off valve T Heating only room 9 By-pass valve (ﬁeld

supply) T4..6 Individual room

13 Motorised 2-way valve

to shut off the ﬂoor heating loops during cooling operation (ﬁeld supply)

activation of the room thermostat (ﬁeld supply)

thermostat (optional)

thermostat for fan coil heated/cooled room (optional)

Pump operation

With no thermostat connected to the indoor unit (2), the pump (4) can be conﬁgured to operate either as long as the indoor unit is on, or until the required water temperature is reached.

NOTE

Details on pump conﬁguration can be found under

"Pump operation conﬁguration" on page 21.

Space heating and cooling

According to the season, the customer will select heating or cooling through the user interface on the indoor unit.

The outdoor unit (1) will operate in heating mode or cooling mode to achieve the target leaving water temperature.

With the unit in heating mode, the 2-way valve (13) is open. Hot water is provided to both the fan coil units and the ﬂoor heating loops.

With the unit in cooling mode, the 2-way valve (13) is closed to prevent cold water running through the ﬂoor heating loops (FHL).

When closing several loops in the system by remotely controlled valves, it might be required to install a by-pass valve (9) to avoid the ﬂow switch safety device from being activated. See also "Application 2" on page 4.

Application 5

Space heating with an auxiliary boiler (alternating operation)

Space heating application by either the Daikin indoor unit or by an auxiliary boiler connected in the system. The decision whether either the EKHB* indoor unit or the boiler will operate can be achieved by an auxiliary contact or an EKHB* indoor controlled contact.

The auxiliary contact can e.g. be an outdoor temperature thermostat, an electricity tariff contact, a manually operated contact, etc. See

"Field wiring conﬁguration A" on page 7.

The EKHB* indoor unit controlled contact (also called ’permission signal for the auxiliary boiler") is determined by the outdoor temperature (thermistor located at the outdoor unit). See "Field wiring

conﬁguration B" on page 7.

Bivalent operation is only possible for space heating operation, not for the domestic water heating operation. Domestic hot water in such an application is always provided by the domestic hot water tank which is connected to the Daikin indoor unit.

The auxiliary boiler must be integrated in the piping work and in the ﬁeld wiring according to the illustrations below.

CAUTION

■ Be sure that the boiler and the integration of the boiler in the system is in accordance with relevant European and national regulations.

■ Daikin can not be put responsible for incorrect or unsafe situations in the boiler system.

54321 8 18

617

Wiring of the 2-way valve (13) is different for a NC (normal closed) valve and a NO (normal open) valve! Make sure to connect to the correct terminal numbers as detailed on the wiring diagram.

The ON/OFF setting of the heating/cooling operation is done by the user interface on the indoor unit.

16 17157

FHL1

FHL2

1 Outdoor unit 11 Heat exchanger coil 2 Indoor unit 12 Domestic hot water tank 3 Heat exchanger 4 Pump 15 Boiler (ﬁeld supply) 5 Shut-off valve 16 Aquastat valve 6 Collector (ﬁeld supply) 7 Shut-off valve 17 Shut-off valve 8 Motorised 3-way valve

(delivered with the domestic hot water tank)

FHL1...3 Floor heating loop

(optional)

(ﬁeld supply)

18 Non-return valve

(ﬁeld supply)

(ﬁeld supply)10 Booster heater

FHL3

Installation manual

Indoor unit for air to water heat pump system

EKHBH/XE008BA

4PW56303-1A

Field wiring conﬁguration A

Com

EKHB*

EKHB*/auto

Boiler thermostat input

A Auxiliary contact (normal closed) H Heating demand room thermostat (optional) K1A Auxiliary relay for activation of EKHB* unit (ﬁeld

K2A Auxiliary relay for activation of boiler (ﬁeld supply)

/ Boiler

K1A

K2A

Boiler thermostat input

supply)

X2M

123 4

K1A

Boiler

thermostat input

K2A

Field wiring conﬁguration B

EKHB*

X2M

3 4

K1A

Com

EKRTR*

Boiler thermostat input

C Cooling demand room thermostat (optional) H Heating demand room thermostat (optional) Com Common room thermostat (optional) K1A Auxiliary relay for activation of bolier unit

KCR Permission signal for the auxiliary boiler

EKHB*

X2M

3 4

K1A

Com

EKRTW*

Boiler thermostat input

(ﬁeld supply)

EKRP1HB

KCR

X1 X2

K1A

Boiler

thermostat input

Operation

■ Conﬁguration A

When the room thermostat requests heating, either the EKHB* unit or the boiler starts operating, depending on the position of the auxiliary contact (A).

■ Conﬁguration B

When the room thermostat requests heating, either the EKHB* unit or the boiler starts operating, depending on the outdoor temperature (status of "permission signal for the auxiliary boiler").

When the permission is given towards the boiler, the space heating operation by the EKHB* unit will be automatically switched off.

For more details see ﬁeld setting [C-02~C-04].

NOTE

■ Conﬁguration A

Make sure that auxiliary contact (A) has sufﬁcient differential or time delay so as to avoid frequent changeover between the EKHB* unit and the boiler. If the auxiliary contact (A) is an outdoor temperature thermostat, make sure to install the thermostat in the shade, so that it is not inﬂuenced or turned ON/OFF by the sun.

Conﬁguration B

Make sure that the bivalent hysteresis [C-04] has sufﬁcient differential to avoid frequent changeover between the EKHB* unit and the boiler. As the outdoor temperature is measured via the outdoor unit, air thermistor make sure to install the outdoor unit in the shade, so that it is not inﬂuenced by the sun.

Frequent switching may cause corrosion of the boiler in an early stage. Contact the manufacturer of the boiler.

■ During heating operation of the EKHB* unit, the unit will operate so as to achieve the target leaving water temperature as set on the user interface. When weather dependent operation is active, the water temperature is determined automatically depending on the outdoor temperature.

During heating operation of the boiler, the boiler will operate so as to achieve the target leaving water temperature as set on the boiler controller.

Never set the target leaving water temperature set point on the boiler controller above 55°C.

■ Make sure to only have 1 expansion vessel in the water circuit. An expansion vessel is already premounted in the Daikin indoor unit.

NOTE

Make sure to conﬁgure the DIP switch SS2-3 on the PCB of the EKHB* switchbox correctly. Refer to "Room

thermostat installation conﬁguration" on page 20.

For conﬁguration B: Make sure to conﬁgure the ﬁeld settings [C-02, C-03 and C-04] correctly. Refer to

"Bivalent operation" on page 28.

CAUTION

Make sure that return water to the EKHB* heat exchanger never exceeds 55°C.

For this reason, never put the target leaving water temperature set point on the boiler controller above 55°C and install an aquastat

(a)

valve in the return water ﬂow of

the EKHB* unit. Make sure that the non-return valves (ﬁeld supply) are

correctly installed in the system. Make sure that the room thermostat (th) is not frequently

turned ON/OFF. Daikin shall not be held liable for any damage resulting

from failure to observe this rule.

(a) The aquastat valve must be set for 55°C and must operate to close the return

water ﬂow to the unit when the measured temperature exceeds 55°C. When the temperature drops to a lower level, the aquastat valve must operate to open the return water ﬂow to the EKHB* unit again.

EKHBH/XE008BA

Indoor unit for air to water heat pump system

4PW56303-1A

Manual permission towards the EKHB* unit on the boiler. In case only the EKHB* unit should operate in space

heating mode, disable the bivalent operation via setting [C-02].

In case only the boiler should operate in space heating mode, increase the bivalent ON temperature [C-03] to 25°C.

Installation manual

Application 6

Space heating with room thermostat application through ﬂoor heating loops and fan coil units. The ﬂoor heating loops and fan coil units require different operating water temperatures.

The ﬂoor heating loops require a lower water temperature in heating mode compared to fan coil units. To achive these two set points, a mixing station is used to adapt the water temperature according to requirements of the ﬂoor heating loops. The fan coil units are directly connected to the indoor unit water circuit and the ﬂoor heating loops after the mixing station. The control of this mixing station is not done by the indoor unit.

The operation and conﬁguration of the ﬁeld water circuit is the responsibility of the installer.

Daikin only offers a dual set point control function. By this function two set points can be generated. Depending on the required water temperature (ﬂoor heating loops and/or fan coil units are required) ﬁrst set point or second set point can be activated.

54321

8 9

1 Outdoor unit 8 Shut-off valve 2 Indoor unit 9 Mixing station (ﬁeld supply) 3 Heat exchanger T1 Room thermostat for zone 4 Pump 5 Shut-off valve T2 Room thermostat for zone 6 Collector zone A

(ﬁeld supply) FCU1..3 Fan coil unit (optional)

7 Collector zone B

(ﬁeld supply)

FHL1...3 Floor heating loop

The advantage of the dual set point control is that the heat pump will/can operate at the lowest required leaving water temperature when only ﬂoor heating is required. Higher leaving water temperatures are only required in case fan coil units are operating. This results in a better performance of the heat pump.

FCU1

FHL1

A (optional)

B (optional)

(ﬁeld supply)

FCU2

FHL2

FCU3

FHL3

Pump operation and space heating

When the room thermostat for the ﬂoor heating loop (T1) and the fan coil units (T2) are connected to the indoor unit, the pump (4) will operate when there is a request for heating from T1 and/or T2. The outdoor unit will start operating to achieve the target leaving water temperature. The target leaving water temperature depends on which room thermostat is requesting heating.

Set point Field setting Thermo status

Zone A First UI ON OFF ON OFF Zone B Second [7-03] OFF ON ON OFF Resulting water temperature UI [7-03] [7-03] — Result pump operation ON ON ON OFF

When the room temperature of both zones is above the thermostat set point, the outdoor unit and pump will stop operating.

NOTE

■ Make sure to connect the thermostat wires to the correct terminals (see "Overview of the indoor

unit" on page 9).

■ Make sure to conﬁgure the ﬁeld settings [7-02], [7-03] and [7-04] correctly. Refer to "Dual set point

control" on page 26.

■ Make sure to conﬁgure the DIP switch SS2-3 on the PCB of the EKHBH switch box correctly. Refer to "Room thermostat installation conﬁguration" on

page 20.

NOTE

■ The request signals for space heating can be implemented in two different ways (installer choice).

- Thermo ON/OFF signal from room thermostat

- Status signal (active/not active) from the

mixing station

■ It is the installers responsibility to make sure no unwanted situations can occur (e.g. too high water temperatures towards ﬂoor heating loops, etc.)

■ Daikin does not offer any type of mixing station. Dual set point control only provides the possibility to use two set points.

■ When only zone A request heating, zone B will be fed with water at a temperature equal to the ﬁrst set point. This can lead to unwanted heating of zone B.

■ When only zone B request heating, the mixing station will be fed with water at a temperature equal to the second set point. Depending on the control of the mixing station, the ﬂoor heating loop can still receive water at a temperature equal to set point of the mixing station.

Be aware that the actual water temperature through the ﬂoor heating loops depends on the control and setting of the mixing station.

Installation manual

Indoor unit for air to water heat pump system

EKHBH/XE008BA

4PW56303-1A

OVERVIEW OF THE INDOOR UNIT

Opening the indoor unit

■ The front ﬂap on the indoor unit cover gives access to the manometer and user interface.

■ The indoor unit cover can be removed by removing the 2 bottom screws and unhitching the cover.

DANGER

■ Do not touch water pipes during and immediately after operation as the pipes may be hot. Your hand may suffer burns. To avoid injury, give the piping time to return to normal temperature or be sure to wear proper gloves.

■ When service panels are removed, live parts can be easily touched by accident. Never leave the unit unattended during installation or servicing when the service panel is removed.

Make sure to ﬁx the cover with the screws when installing the cover (screws are delivered as accessory).

Parts inside the unit can be hot.

■ To gain access to the switch box components – e.g. to connect the ﬁeld wiring – the switch box service panel can be removed. Thereto, loosen the front screws and unhitch the switch box service panel.

WARNING

■ Switch off all power supply – i.e. outdoor unit power supply and backup heater and domestic hot water tank power supply (if applicable) – before removing the switch box service panel.

■ Do not touch the refrigerant pipes during and immediately after operation as the refrigerant pipes may be hot or cold, depending on the condition of the refrigerant ﬂowing through the refrigerant piping, compressor, and other refrigerant cycle parts. Your hands may suffer burns or frostbite if you touch the refrigerant pipes. To avoid injury, give the pipes time to return to normal temperature or, if you must touch them, be sure to wear proper gloves.

■ Do not touch the internal parts (pump, backup heater, etc.) during and immediately after operation.

Your hands may suffer burns if you touch the internal parts. To avoid injury, give the internal parts time to return to normal temperature or, if you must touch them, be sure to wear proper gloves.

EKHBH/XE008BA

Indoor unit for air to water heat pump system

4PW56303-1A

Installation manual

Main components

19 18

13. Drain and ﬁll valves

14. Water ﬁlter

The water ﬁlter removes dirt from the water to prevent damage to the pump or blockage of the evaporator. The water ﬁlter must

be cleaned on a regular base. See "Maintenance and service"

on page 33.

15. Manometer The manometer allows readout of the water pressure in the

water circuit.

16. Flow switch

The ﬂow switch checks the ﬂow in the water circuit and protects the heat exchanger against freezing and the pump against damage.

17. Pump The pump circulates the water in the water circuit.

18. Backup heater thermal protector The backup heater is equipped with a thermal protector. The

thermal protector is activated when the temperature becomes

5 6

too high.

19. Backup heater thermal fuse The backup heater is equipped with a thermal fuse. The thermal

fuse is blown when the temperature becomes too high (higher than the backup heater thermal protector temperature).

20. Pressure relief valve

7 15

The pressure relief valve prevents excessive water pressure in the water circuit by opening at 3 bar and discharging some water.

21. Pressure relief valve hose The actual outlet of the pressure relief valve. Make sure to

provide a proper drain.

1. Air purge valve Remaining air in the water circuit will be automatically removed

via the air purge valve.

2. Backup heater The backup heater consists of an electrical heating element in

the backup heater vessel that will provide additional heating capacity to the water circuit if the heating capacity of the outdoor unit is insufﬁcient due to low outdoor temperatures.

3. Temperature sensors Four temperature sensors determine the water and refrigerant

temperature at various points in the water circuit.

4. Switch box The switch box contains the main electronic and electrical parts

of the indoor unit.

5. Heat exchanger

6. Expansion vessel (10 l)

7. User interface

The user interface allows the installer and user to set up, use and maintain the unit.

8. Refrigerant liquid connection

9. Refrigerant gas connection

10. Shut-off valves (accessory)

The shut-off valves on the water inlet connection and water outlet connection allow isolation of the indoor unit water circuit side from the residential water circuit side. This facilitates draining and ﬁlter replacement of the indoor unit.

11. Water inlet connection

12. Water outlet connection

8 9 13 10

Installation manual

Indoor unit for air to water heat pump system

EKHBH/XE008BA

4PW56303-1A

Switch box main components

TR1

K1M

K5M

12. X9A socket The X9A socket receives the thermistor connector (only for

installations with domestic hot water tank).

13. Fuse FU2 (in line fuse)

14. Tr ansformer TR1

15. A4P Digital I/O PCB (only for installations with solar kit or digital I/O

PCB kit).

X9A

NOTE

2 3

The electrical wiring diagram can be found on the inside of the switch box cover.

Functional diagram

X13A

SS2

FU1

A1P

A4P

X2M X4M

X1M

K3M

F2B F3B F1B

X3M

FU2

4 5

32 4 8

R1T

t >

R3T

t >

5 6 7

R2T

t >

R4T

t >

1. Backup heater contactors K1M and K5M.

2. Main PCB

The main PCB (Printed Circuit Board) controls the functioning of the unit.

3. Booster heater contactor K3M (only for installations with domestic hot water tank)

4. Booster heater circuit breaker F2B (only for installations with domestic hot water tank)

The circuit breaker protects the booster heater in the domestic

hot

water tank against overload or short circuit.

5. Backup heater circuit breaker F1B, F3B The circuit breaker protects the backup heater electrical circuit

against overload or short circuit.

6. Ter minal blocks The terminal blocks allow easy connection of ﬁeld wiring.

7. Cable tie mountings The cable tie mountings allow to ﬁx the ﬁeld wiring with cable

ties to the switch box to ensure strain relief.

8. Ter minal blocks X3M, X4M (only for installations with domestic hot water tank)

9. PCB fuse FU1

10. DIP switch SS2

The DIP switch SS2 provides 4 toggle switches to conﬁgure certain installation parameters. See "DIP switch settings

overview" on page 20.

11. X13A socket The X13A socket receives the K3M connector (only for

installations with domestic hot water tank).

12131

1 Outdoor unit 10 Shut-off valve water outlet 2 Indoor unit

3 Expansion vessel 11 Shut-off valve water inlet with 4 Manometer 5 Air purge valve 12 Filter 6 Pressure relief valve 13 Heat exchanger 7 Backup heater R1T

9 Flow switch

with drain valve (ﬁeld installation)

drain valve (ﬁeld installation)

R2T

Temperature sensors8 Pump

R3T R4T

EKHBH/XE008BA

Indoor unit for air to water heat pump system

4PW56303-1A

Installation manual

+ 29 hidden pages