Daikin EKHBH016BA, EKHBX016BA Installation manuals
INSTALLATION MANUAL
Indoor unit for air to water heat pump system
EKHBH016BA
EKHBX016BA
35
8
01
SP
2
1
12 3 45
2x2x1x 1x 1x
1
3
2
4
260
T T
895
922
830
1-1/4" MB
2
3
B B
469
4
30°
90°
361
48
4
1
96
39
4
5
3
ONTENTS
C
EKHBH016BA***
EKHBX016BA***
Indoor unit for air to water heat pump system
age
P
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........................................................................................13
Charging water......................................................................................... 15
Piping insulation....................................................................................... 16
Field wiring............................................................................................... 16
Start-up and configuration ...............................................................21
DIP switch settings overview....................................................................21
Room thermostat installation configuration.............................................. 21
Pump operation configuration..................................................................22
Domestic hot water tank installation configuration................................... 23
Initial start-up at low outdoor ambient temperatures................................ 23
Pre-operation checks...............................................................................23
Powering up the indoor unit ..................................................................... 23
Setting the pump speed...........................................................................23
Field settings............................................................................................ 24
Field settings table...................................................................................33
Test run and final check...................................................................35
Final check............................................................................................... 35
Automatic test run.................................................................................... 35
Test run operation (manual) ..................................................................... 35
Maintenance and service ................................................................35
Troubleshooting ...............................................................................36
General guidelines................................................................................... 36
General symptoms................................................................................... 37
Error codes ..............................................................................................38
Technical specifications................................................................... 40
General ....................................................................................................40
Electrical specifications............................................................................ 40
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
I
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 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. The backup heater models are available for a
heating capacity of 3, 6 and 9 kW, and – depending on the heating
capacity – for three different power supply specifications.
Backup heater
Indoor unit model Backup heater capacity
EKHB*016BA3V3
EKHB*016BA6V3
EKHB*016BA6WN
EKHB*016BA9WN
EKHB*016BA6T1
EKHB*016BA9T1
3 kW 1x 230 V
6 kW 1x 230 V
6 kW 3x 400 V
9 kW 3x 400 V
6 kW 3x 230 V
9 kW 3x 230 V
nominal voltage
EKHBH/X016BA
Indoor unit for air to water heat pump system
4PW54187-1B
Installation manual
1
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2
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4
1
2
3
4
5
NOTE
An ERLQ0* BA outdoor unit can only be
connected to an EKHBH/X016 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/X016 BA indoor unit or to an
EKHBH/X016 AA/AB indoor unit (if a bottom plate
heater kit is required, see "Possible options" on
page 2).
P
H
43
1
2
T
A
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 24)
T
Ambient (outdoor) temperature
A
P
Heating capacity
H
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
EKBPHT16Y* EKBPHTH16A
EKHBH/X016 AA/AB
EKHBH/X016 BA
Possible Not allowed
Possible Possible
Connection to a benefit kWh rate power supply
This equipment allows for connection to benefit kWh rate power
supply delivery systems. Full control of the unit will remain possible
only in case the benefit kWh rate power supply is of the type that
power supply is not interrupted. Refer to "Connection to a benefit
kWh rate power supply" on page 19 for more details.
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 X 016 AA 3 V3
Backup heater nominal
voltage:
V3 = 1P, 230 V
WN = 3P, 400 V
T1 = 3P, 230 V
Backup heater capacity (kW)
Series
Indication of heating/cooling capacity (kW)
X = heating and cooling,
H = heating only
Hydro box
European kit
(a) For exact values, refer to "Technical specifications" on page 40.
(a)
Drain pan kit (optional)
EK HB DP 150
Drain pan
Hydro box
European kit
A
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
2
Indoor unit for air to water heat pump system
EKHBH/X016BA
4PW54187-1B
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S
AFETY
The precautions listed here are divided into the following four 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/X016BA
Indoor unit for air to water heat pump system
4PW54187-1B
Installation manual
3
T
YPICAL
APPLICATION
EXAMPLES
Application 2
1
6
2
7
3
4
T
5
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.
T
5 64321
7
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 21).
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
T1
M
M1
121011
7
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
(optional)
thermostat (optional)
M1..3 Individual motorised
valve to control loop
FHL1 (field supply)
T3
M2T2M3
FHL2
9
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 22.
Installation manual
4
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 13 is guaranteed.
It is recommended to select a pressure difference
controlled by-pass valve.
Indoor unit for air to water heat pump system
EKHBH/X016BA
4PW54187-1B
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 24, field settings [5-02] to [5-04].
Application 3
Space heating and cooling 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 heating or cooling
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 21).
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.
6
T
54321
8 13
M M
7
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
10
(optional)
(field supply)
heating/cooling switch
(optional)
Application 4
Space heating and cooling 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.
9
6
T4
T5
FCU2
6
FHL2
T6
FCU3
FHL3
FCU1
T
54321
7
13M14
M
FHL1
EKHBH/X016BA
Indoor unit for air to water heat pump system
4PW54187-1B
Installation manual
5
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)
13 Motorised 2-way valve
to shut off the floor
heating loops during
cooling operation
(field supply)
T4..6 Individual room
activation of the room
thermostat (field supply)
thermostat (optional)
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 22.
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
M
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
10
11
FHL1
FHL2
12
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)
(field supply)
18 Non-return valve
(field supply)
(field supply)10 Booster heater
FHL3
Installation manual
6
Indoor unit for air to water heat pump system
EKHBH/X016BA
4PW54187-1B
Field wiring configuration A
L
H
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
N
A
K1A
K2A
Boiler thermostat input
supply)
X2M
123 4
K1A
Boiler
thermostat input
Y
X
K2A
Field wiring configuration B
EKHB*
X2M
12
3 4
K1A
Com
HC
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
12
K1A
Com
H
C
EKRTW*
Boiler thermostat input
(field supply)
EKRP1HB*
KCR
X1 X2
K1A
Y
X
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 21.
For configuration B: Make sure to configure the field
settings [C-02, C-03 and C-04] correctly. Refer to
"Bivalent operation" on page 30.
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/X016BA
Indoor unit for air to water heat pump system
4PW54187-1B
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
7
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.
B
7
T1
T2
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
A
6
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 28.
■ 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 21.
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
8
Indoor unit for air to water heat pump system
EKHBH/X016BA
4PW54187-1B
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.
1
1
33
3
2
EKHBH/X016BA
Indoor unit for air to water heat pump system
4PW54187-1B
Installation manual
9
Main components
20
19
18
17
3
16
14
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
1
be cleaned on a regular base. See "Maintenance and service"
on page 35.
15. Manometer
The manometer allows readout of the water pressure in the
water circuit.
16. Flow switch
2
The flow switch checks the flow in the water circuit and protects
the heat exchanger against freezing and the pump against
damage.
3
4
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
3
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
3
provide a proper drain.
21
13
10
12
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
11
Installation manual
10
Indoor unit for air to water heat pump system
EKHBH/X016BA
4PW54187-1B
Switch box main components
15
12
X9A
TR1
K1M K2M
K5M
12. X9A socket
The X9A socket receives the thermistor connector (only for
installations with domestic hot water tank).
13. Pump fuse FU2 (in line fuse)
14. Pump relay K4M
1
15. Tr ansformer TR1
16. A4P
Digital I/O PCB (only for installations with solar kit or digital I/O
PCB kit).
NOTE
2
3
The electrical wiring diagram can be found on the
inside of the switch box cover.
11
10
16
X13A
SS2
FU1
9
6
A1P
A4P
X2M X4M
K3M K6M
F2B F3B F1B
K4M
FU2
1
4
5
5
14
13
8
6
8
X1M
X3M
7
1. Backup heater contactors K1M, K2M, K5M and K6M.
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. Te r 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. Te r 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 21.
11. X13A socket
The X13A socket receives the K3M connector (only for
installations with domestic hot water tank).
Functional diagram
32 4 8
R1T
t >
R3T
t >
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
5 6 7
R2T
t >
H
O
2
R2T
R3T
R4T
R4T
t >
12131
with drain valve (field
installation)
drain valve (field installation)
Temperature sensors8 Pump
9
10
11
EKHBH/X016BA
Indoor unit for air to water heat pump system
4PW54187-1B
Installation manual
11
INSTALLATION OF THE INDOOR UNIT
Dimensions and service space
Selecting an installation location
The unit is to be wall mounted in an indoor location that meets the
following requirements:
■ The installation location is frost-free.
■ The space around the unit is adequate for servicing. (See
figure 2).
■ The space around the unit allows for sufficient air circulation.
■ There is a provision for condensate drain (only for EKHBX
models with drain pan kit EKHBDP) and pressure relief valve
blow-off.
■ The installation surface is a flat and vertical non-combustible
wall, capable of supporting the operation weight of the unit (see
"Technical specifications" on page 40).
■ There is no danger of fire due to leakage of inflammable gas.
■ All piping lengths and distances have been taken into
consideration.
Requirement Value
Maximum allowable refrigerant piping length between
outdoor unit and indoor unit
Minimum required refrigerant piping length between
outdoor unit and indoor unit
Maximum allowable height difference between
outdoor unit and indoor unit
Maximum allowable distance between the 3-way
valve and the indoor unit (only for installations with
domestic hot water tank).
Maximum allowable distance between the domestic
hot water tank and the indoor unit (only for
installations with domestic hot water tank). The
thermistor cable supplied with the domestic hot water
tank is 12 m in length.
(a) When <5 m, recharging of the outdoor unit (only for V3 model) is required.
Refer to the installation manual of the outdoor unit.
■ During normal operation the hydrobox unit will produce sound
which could be observed as noise. The sound origin can be
water pump operation and/or contactor activation. Therefore it is
advisable to install the hydrobox unit on a firm wall and not in nor
close to a sound sensitive environment (e.g. bedroom).
■ Do not install the unit in places with high humidity (e.g.
bathroom).
■ Select piping diameter in relation to required water flow and
available ESP of pump.
■ The equipment is not intended for use in a potentially explosive
atmosphere.
■ Do not install the unit in places often used as work place.
In case of construction works (e.g. grinding works) where a lot of
dust is created, the unit must be covered.
■ Ta ke care that in the event of a water leak, water can not cause
any damage to the installation space and surroundings.
■ Do not place any objects or equipment on top of the unit.
■ Be sure that sufficient precautions are taken, in accordance with
relevant local and national regulations, in case of refrigerant
leakage.
75 m
3 m
30 m
3 m
10 m
(a)
Unit of measurement: mm
Dimensions of the unit, see figure 3
1 Flexible drain hose 5 Refrigerant gas
2 Water outlet connection
3 Water inlet connection FBSP Female British Standard
4 Refrigerant liquid
connection
MBSP Male British Standard
connection
Pipe
Pipe
Required service space, see figure 2
Inspecting, handling and unpacking the unit
■ The indoor unit is packed in a cardboard box, fixed by straps on
a wooden pallet.
■ At delivery, the unit must be checked and any damage must be
reported immediately to the carrier claims agent.
■ Check if all indoor unit accessories (see "Accessories" on
page 2) are enclosed.
■ Bring the unit as close as possible to its final installation position
in its original package in order to prevent damage during
transport.
■ The indoor unit weighs approximately 48 kg and should be lifted
by two persons using the two lifting bars provided.
CAUTION
Do not grasp the switch box or piping to lift the unit! Two
lifting bars are provided to lift the unit.
CAUTION
If the installation is equipped with a domestic hot water
tank (optional), please refer to the domestic hot water tank
installation manual.
Installation manual
12
Indoor unit for air to water heat pump system
EKHBH/X016BA
4PW54187-1B
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