Daikin EKCC8-W Operation manuals
INSTALLATION AND
OPERATION MANUAL
Central control for hydroboxes
EKCC8-W
EKCC8-W
1
23
4 5 6
×2
×1
×1
×5
×1
×2
Central control for hydroboxes
Installation and
operation manual
Table of contents Page
1. Supplied accessories and intended use.................................... 1
2. General layout and setup of a system....................................... 2
3. Installation ................................................................................. 3
3.1. Mounting place............................................................................... 3
3.2. Wiring the central control............................................................... 3
4. Installer settings......................................................................... 3
4.1. Confirmation of the installer settings.............................................. 3
4.2. Language ....................................................................................... 3
4.3. Operating modes? ......................................................................... 4
4.4. Centralized DHW tank? ................................................................. 4
4.5. Backup heater room heating?........................................................ 5
4.6. System layout? .............................................................................. 5
ON/OFF method ............................................................................ 5
Number of zones............................................................................ 5
Configuration.................................................................................. 5
4.7. Control parameters ........................................................................ 6
4.8. Diagnostics .................................................................................... 6
4.9. IP settings ...................................................................................... 6
5. Operation................................................................................... 6
5.1. Basic control .................................................................................. 6
5.2. Main menu ..................................................................................... 6
To System info ............................................................................... 6
To Unit info ..................................................................................... 6
To DHW info................................................................................... 6
To User settings ............................................................................. 7
6. Alarm handling........................................................................... 8
6.1. Unit alarms..................................................................................... 8
6.2. System alarms ............................................................................... 8
6.3. Alarm menu.................................................................................... 8
7. Troubleshooting......................................................................... 8
8. Figures....................................................................................... 9
9. Operation of the central control and menu structure ............... 12
10. Optional modules..................................................................... 17
The original instructions are written in English. All other languages
are translations of the original instructions.
1. Supplied accessories and intended use
1 Power supply 24 V AC for Microtech III controller
(Siemens)
2 POL687.70 Microtech III central control
(Siemens/McQuay)
3 Connectors for Microtech III controller
4 Sensor holder
5 Sensor for common leaving water
6 Basic installation instructions
Intended use
The central control is used to control following units in cascade.
EKHBRD* series
EKHVM* series
HXHD125*
EWAQ16..64
EWYQ16..64
SEHVX*
EH*CA
Every unit or group of units is connected through a ModBus gateway
(to be bought separately from Daikin) to the central control. For
required type of Modbus gateway, see the general catalogue.
Moreover, the central control can control other components of the
installation as explained in
on page 2.
"2. General layout and setup of a system"
Installation and operation manual
1
Options
EKCLWS
Tank sensor for centralized DHW tank.
EKCMBACIP
Allows settings on the EKCC through BacNetIP. Refer to
"10. Optional modules" on page 17 for more information.
EKCMBACMSTP
Allows settings on the EKCC through BacNet MSTP. Refer to
"10. Optional modules" on page 17 for more information.
EKCM200J
Allows settings on the EKCC through Modbus. Refer to
"10. Optional modules" on page 17 for more information.
EU.SB.5000002
Advanced webserver. Allows alarm messaging by e-mail. Refer
to
"10. Optional modules" on page 17 for more information.
Central control for hydroboxes
4P364459-1A – 2014.03
EKCC8-W
2. General layout and setup of a system
The central control can control the following in a system:
Leaving water temperature to the secondary circuit (circuit to the
heat emitters)
The setpoint for the leaving water temperature to the secondary
circuit can be set. The central control will change the setpoint of
the units and switch more or less units ON/OFF in order to reach
this setpoint.
Pump of the secondary circuits (2 zones)
Backup heater for room heating
Domestic hot water temperature in a centralized domestic hot
water tank
In case of a system with domestic hot water, the system can be set
up in 2 ways:
1. System with integrated hot water tank(s) (with EKHBRD/EKHVM
hydroboxes)
Refer to Figure 3: System with integrated hot water tanks on
page 11 for a setup example.
In this case, the units for domestic hot water have their own
tank, 3-way valve and 3-way valve control. The parameters for
heating domestic hot water (setpoint, schedule, etc.) must be set
on the control of the unit itself. Refer to the operation/installation
manual of the unit.
On the central control, you can define whether a unit has
domestic hot water function or not. (This can be defined in the
installer settings. Refer to
If the unit is defined as a unit for domestic hot water, it will
always get the lowest priority to start up during room heating, in
order to reserve it as much as possible for DHW heating. During
room cooling, it will always get the highest priority in order to
recover the heat to the DHW tank.
When the system is set to heating or cooling (on the central
control or by external contact connected to the central control),
the central control will switch on the pump of the secondary
circuit and change the setpoint of the hydroboxes in order to
reach the setpoint for the leaving water temperature to the
secondary circuit.
If the hydroboxes cannot reach the set temperature to the
secondary circuit and depending on other parameters set on the
central control, the central control will also switch on the backup
heater and open the backup heater valve.
"Configuration" on page 5.)
2. System with centralized domestic hot water tank
Refer to Figure 2: System with centralized domestic hot water
tank on page 10 for a setup example.
In this case, a tank sensor in the centralized tank is connected to
the central control. The central control will increase the setpoint
of the units and switch the 3-way valve when the temperature in
the tank becomes too low. The tank can also be heated by a
backup heater. Refer to
heater settings.
INFORMATION
This means that the units are put in heating mode to
heat the DHW tank. For this reason, this setup is only
applicable to EKHBRD*AC units set to the so-called
'DHW application setting'.
This must be done by setting the indoor unit
parameters 5-04=1 and 7-01=1. Refer to the
installation manual of the indoor units for information
about how to set the parameters.
Refer also to configuration C of the 'Application guide
Altherma flex for commercial applications').
This setup is not advised for EKHVM units, since
heating mode is only possible up to an outdoor
temperature of 25°C.
For EWYQ units, post-heating of domestic hot water
might be required, since the maximum leaving water
temperature of these units is limited to 50°C.
When the system is set to heating or cooling (on the central
control or by external contact connected to the central control),
the central control will switch on the pump of the secondary
circuit, switch the hydroboxes ON/OFF and change the setpoint
in order to reach the setpoint for the leaving water temperature
to the secondary circuit.
If the hydroboxes cannot reach the set temperature to the
secondary circuit and depending on other parameters set on the
central control, the central control will also switch on the backup
heater and the backup heater valve for room heating.
Domestic hot water heating by heatpump or backup heater will
be prevented when the contact S3 from the solar station is
closed.
Note: In the example BUH1 and BUH2 act as backup heaters for
room heating step 1 and step 2. BUH2 also acts as backup
heater for DHW and is at that time switched ON by output D08
(BUHw).
"4.4. Centralized DHW tank?", Backup
EKCC8-W
Central control for hydroboxes
4P364459-1A – 2014.03
Installation and operation manual
2
3. Installation
3.1. Mounting place
When the central control is ON, the units will be controlled (setpoint
setting, ON/OFF control, etc.) by the central control. This will overrule
the ON/OFF setting on the individual remote controllers. For ON/OFF
control using the remote controllers of the units, the central control
must be set to OFF. In order to allow local control of the units at all
times, the central control must be installed in the vicinity of the
individual remote controllers.
3.2. Wiring the central control
Also refer to Figure 1: Electrical wiring diagram on page 9.
WARNING
All electrical wiring must be installed by a licensed
electrician and must comply with local regulations.
Modbus wiring
The control uses Modbus to communicate with the hydroboxes.
Make sure to wire the RS485 wiring (2-wire twisted pair + shield)
from the central control to the RTD*s.
Also make sure to configure the addresses on the RTD*
correctly (refer to RTD* manual).
Digital inputs
In order to start the system in heating/cooling by an external
voltage free contact, wire the following digital inputs:
- X1-M: Heating ON zone 1
- X2-M: Cooling ON zone 1
- X3-M: Heating ON zone 2
- X4-M: Cooling ON zone 2
INFORMATION
The central control can also be configured to start
heating/cooling using the central control. In that
case, it is not necessary to wire these contacts.
HEATING ON gets priority over COOLING ON.
- X5-M: This voltage free input changes the value of the
outdoor temperature at which the backup heater is allowed to
operate. Also refer to
page 5.
- X6-M: This voltage free input detects alarms of the backup
heater.
- X7-M: This voltage free contact stops DHW heating by the
heatpump and backup heater when closed (e.g. contact from
solar station).
- X8-M: This contact changes the setpoint of the central
domestic hot water tank as defined in the controller (e.g. to
store DHW at higher temperature when there is an excess of
electricity due to photovoltaic installation).
- DI1/2-M: This contact will count the pulses from pulse
counter and convert them to a value as defined on the
controller.
Analog inputs
- AI1-M: Common leaving water sensor. This sensor measures
the leaving water temperature to the secondary circuit.
(Supplied with EKCC8-W).
- AI2-M: Domestic hot water temperature. (Daikin option
EKCLWS). Only if you have a centralized tank and DHW
must be controlled by the central control.
"4.5. Backup heater room heating?" on
Digital outputs
- C1-DO1B: Contact to energize the 3-way valve for DHW
heating. This contact closes whenever DHW heating by the
heatpumps is activated by the centralized control.
- C2-DO2A/DO2B: Changeover contact for alarm output.
- C3-DO3: Contact to start the secondary pump of ZONE 1.
This contact closes whenever heating or cooling for ZONE 1
is ON.
- C4-DO4: Contact to start the secondary pump of ZONE 2.
This contact closes whenever heating or cooling for ZONE 2
is ON. (Unless heating is requested by ZONE1 and cooling is
requested by ZONE2. Heating has priority over cooling.)
- C5-DO5: Contact to start Backup heater step 1. This contact
will close as soon as there is a capacity shortage in room
heating.
- C6-DO6: Contact to start Backup heater step 2. This contact
will close as soon as there is a capacity shortage in room
heating and backup heater step 1 is already in operation.
- C7-DO7: Contact to energize the backup heater valve for
room heating. This contact will close a defined time before
the backup heater is started.
- C8-DO8: Contact to energize the backup heater valve and/or
heater for domestic hot water heating. This contact will close
as soon as backup heating for domestic hot water heating is
required.
- C9-DO9: Heating operation. This contact closes when the
system is in room heating mode.
- C10-D010: Cooling operation. This contact closes when the
system is in room cooling mode.
INFORMATION
Contact rating:
Switching voltage AC 24 V…230 V (–20%, +10%)
Rated current (res./ind.) Max. AC 3 A / 2 A (cos φ0.6)
Switching current at AC 19 V Min. AC 30 mA
Max. external supply line fusing 6.3 A slow wire fuse or
circuit breaker.
WARNING
Do not mix SELV/PELV and line voltage on the same
terminal.
Use external protection for inductive load.
4. Installer settings
Refer to "9. Operation of the central control and menu structure" on
page 12 for basic operation of the central control.
All items in the 'Installer settings' menu are explained below in detail.
To make the installer settings available, scroll to 'Installer password'
in the main menu and enter the installer password (default: '6000')
and then go to the 'Installer settings' menu.
4.1. Confirmation of the installer settings
Some settings require a restart of the central control in order to
become effective. This is indicated in the first line of the 'Installer
settings' menu. When this line shows 'Restart now?', changes were
made in the installer settings that require a restart to become
effective. Enter the line and select to restart the central control.
When the line shows 'No need to restart', all changes are already
effective.
Installation and operation manual
3
4.2. Language
Select the desired language.
Central control for hydroboxes
4P364459-1A – 2014.03
EKCC8-W
4.3. Operating modes?
4
3
2
1
1
Q
Y
XZ
4
2
232
ǻ7 &
Define the possible operating modes of the system.
Heating only/Cooling only/Heating and cooling/DHW only
This will make sure the user can only select the appropriate modes.
Restart the central control after changing these settings in order to
make them effective.
4.4. Centralized DHW tank?
Define if the system has a centralized DHW tank.
Only if the system has a centralized domestic hot water tank and field
supplied 3-way valve, select:
Centralized tank
Settings for system in combination with room heating
Go to the 'Settings in combination with RH' menu and enter the
desired value for:
DT LWT-SP tank
This value determines the temperature difference between the
setpoint of the leaving water temperature of the unit(s) and the
setpoint of the tank. The higher the value, the faster the tank can
be heated. The lower the value, the more efficiently the tank will
be heated.
DHW differential
Differential for tank heating.
1 DHW differential
2 SP tank (set by user)
3 Start tank heating
4 Stop tank heating
Backup heater settings
Enter here if there is a backup heater for DHW heating.
If there is a backup heater for DHW heating, a curve has to be
entered to define when the heating of the tank is to be done by
the heatpumps and when it is to be done by the backup heater
as shown in the figure below.
- Max. tank temp. at Z°C= Q°C
Define Q, the maximum temperature to which the tank will be
heated by the heatpump at outdoor temperature Z.
INFORMATION
Note 1: Make sure the values are within the
operation range of the heatpump.
Note 2: If the leaving water temperature and
outdoor temperature are such that the DHW
heating is to be done by the heatpump,
operation of backup heating for DHW can also
happen. This will be the case when one of the
heatpumps configured for domestic hot water
heating is in alarm.
Note 3: The controller will close D08 (and not
D05 or D06) when backup heating for
domestic hot water becomes active.
Settings for DHW only system
Whereas a system for room heating and domestic hot water heating
will heat up the domestic hot water as fast as possible in order to be
able to return to room heating as soon as possible, a system
dedicated to heating domestic hot water will heat up the DHW with an
optimum balance between speed and efficiency. Therefore, it will
change the temperature of the leaving water sent to the heating coil
of the tank. If the tank temperature is far from its setpoint, it will
increase the water temperature sent to the tank in order to speed up
heating; when the tank temperature approaches its setpoint, the
water temperature sent to the tank will be decreased in order to
increase efficiency.
Enter the following:
Max. DT
Defines the maximum difference between the setpoint of the
leaving water temperature of the units and the setpoint of the
tank. E.g., if tank setpoint= 50°C, and Max. DT= 20°C, the
maximum water temperature sent to the heating coils of the tank
will be 50°C+20°C=70°C.
Min. DT
Defines the minimum difference between the setpoint of the
leaving water temperature of the units and the setpoint of the
tank. E.g., if tank setpoint= 50°C, and Min. DT= 10°C, the
maximum water temperature sent to the heating coils of the tank
will be 50°C+10°C=60°C.
DHW differential
Refer to setting for systems in combination with room heating.
Backup heater settings
Refer to backup heater room heating for the settings.
INFORMATION
In case of DHW only system, outputs D05 and D06
will act as backup heating outputs for DHW
heating.
1 Leaving water temperature
2 DHW heating by BUH
3 DHW heating by heatpump
4 Outdoor temperature
- BUH at outd. temp. < X°C
Define X. If the outdoor temperature becomes lower than X,
heating of the DHW tank will always be done by the backup
heater.
- Max. tank temp. at X°C= Y°C
Define Y, the maximum temperature to which the tank will be
heated by the heatpump at outdoor temperature X.
- BUH at outd. temp. > Z°C
Define Z. If the outdoor temperature becomes higher than Z,
heating of the DHW tank will always be done by the backup
heater.
EKCC8-W
Central control for hydroboxes
4P364459-1A – 2014.03
Installation and operation manual
4
4.5. Backup heater room heating?
1
2
AB
BC
C
A
1°C
4.6. System layout?
Define here if the system has a backup heater or not and the number
of steps (1 or 2). If so, select 'Backup heating method' and define the
following.
3 methods for the backup heating can be defined:
Method 1: Outd Temp
The backup heater will be allowed to operate, depending on the
outdoor temperature.
- BUH allowed: Below this temperature, BUH is allowed to
operate, but BUH has the lowest priority.
Above this temperature, only heatpump units will run (even if
target leaving water temperature cannot be reached, unless
a heatpump is in alarm, then also BUH will run.)
- BUH only: Below this outdoor temperature, all heatpump
units will be stopped for room heating, and only BUH will
operate for room heating.
34 5
1 At increasing outdoor temperature
2 At decreasing outdoor temperature
3 BUH only
4 BUH allowed
5 Outdoor temperature
A BUH-only zone
B BUH allowed
C No BUH allowed
Method 2: Outd. Temp. + ext. contacts
Define the following settings:
- With open contact
BUH allowed: Define the outdoor temperature for 'BUH
allowed' with OPEN contact.
BUH only: Define the outdoor temperature for 'BUH only' with
OPEN contact.
- With closed contact
BUH allowed: Define the outdoor temperature for 'BUH
allowed' with CLOSED contact.
BUH only: Define the outdoor temperature for 'BUH only' with
CLOSED contact.
Method 3: Outd. Temp. + time
- Time Zone 1
Define the outdoor temperature for 'BUH allowed' and 'BUH
only' from Time Zone 1 onwards.
- Time Zone 2
Define the outdoor temperature for 'BUH allowed' and 'BUH
only' from Time Zone 2 onwards.
- Select time zones
Select for every day of the week the time and zone (Time
Zone 1=Z1/Time Zone 2=Z2)
INFORMATION
General note on schedule settings:
Settings with time *:* are ignored.
ON/OFF method
Define here if the system has to be set to off, heating or cooling on
the central control (refer to the 'User settings' menu > Set room
mode) or by external contacts.
Number of zones
Enter the number of zones (secondary circuits to control). (1 or 2)
Configuration
Enter
No of RTD* installed: The number of RTD*s installed.
Configure unit type auto
When 'YES' is selected, the system will detect and configure the
unit type (cooling only/heating only/reversible) automatically.
INFORMATION
The central control will show the maximum number of
RTD*s that can be controlled. Only the RTD numbers
entered above have to be configured. After restarting
the central control, the list of RTD*s will be restricted
to the number of RTD*s installed.
RTD* configuration:
For every RTD*, enter the following items (the number in the
'RTD*' column corresponds to the address on the RTD*).
•Group (GRP)
Enter which group the RTD* belongs to. RTD*s belonging to
the same group are usually connected to the same outdoor
unit, because the program will start up units belonging to the
same group first, before starting up units belonging to
another group. This is done in order to avoid several outdoor
units running at the same time at low load.
• Type (TYP)
It is recommended to configure the unit type automatically
(see above). However, the type can be changed manually if
desired. In this case, enter if the unit has cooling only,
heating only or cooling and heating function.
• Domestic hot water (DHW)
What happens when you enter yes (Y) depends on whether
the domestic hot water is controlled by the central control or
not. (Refer to
page 2).
If the domestic hot water function is controlled by the unit(s)
itself (integrated tank) and DHW=Y for this unit, then this unit
will always get the lowest priority to start up in heating mode,
in order to preserve it for domestic hot water heating. In
cooling mode, it will get the highest priority in order to be able
to do heat recovery. Domestic hot water heating itself will be
done as configured on the remote controller of the unit.
If the domestic hot water function is controlled by the central
control (refer to Installer settings – Centralized DHW tank?),
the units for domestic hot water must be configured to
DHW=Y. When domestic hot water heating is requested, the
central control will increase the setpoint for those units only.
"2. General layout and setup of a system" on
Delay BUH:
Enter the delay in seconds of the BUH "ON" contact compared
to the BUH valve "ON" contact. (This might be required if the
valve needs time to open before the BUH is allowed to start.)
BUH Loaddown Timer:
Defines the time that has to expire before another loaddown
action can take place after heater step 1 or 2 loaddown.
Installation and operation manual
5
Central control for hydroboxes
4P364459-1A – 2014.03
EKCC8-W
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