Daikin EKCC7-W Operation manuals

INSTALLATION AND

OPERATION MANUAL

Central control for hydroboxes

EKCC7-W

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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 ................................................................................. 2

3.1. Mounting place............................................................................... 2

3.2. Wiring the central control ............................................................... 2

4. Installer settings......................................................................... 3

4.1. Confirmation of the installer settings.............................................. 3

4.2. Language ....................................................................................... 3

4.3. Operating modes? ......................................................................... 3

4.4. Centralized DHW tank? ................................................................. 3

4.5. Backup heater? .............................................................................. 4

4.6. System layout? .............................................................................. 4

ON/OFF method ............................................................................ 4

Configuration.................................................................................. 4

4.6. System layout? .............................................................................. 4

4.7. Control parameters ........................................................................ 5

4.8. Diagnostics .................................................................................... 5

4.9. IP settings ...................................................................................... 5

5. Operation................................................................................... 5

5.1. Basic control .................................................................................. 5

5.2. Main menu ..................................................................................... 5

To System info ............................................................................... 5

To Unit info ..................................................................................... 5

To DHW info ................................................................................... 5

To User settings ............................................................................. 6

6. Alarm handling........................................................................... 6

6.1. Unit alarms ..................................................................................... 6

6.2. System alarms ............................................................................... 6

6.3. Alarm menu.................................................................................... 7

7. Troubleshooting......................................................................... 7

8. Figures....................................................................................... 8

9. Operation of the central control and menu structure ............... 10

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 Daikin units in cascade.

 EKHBRD* series

 EKHVM* series

 HXHD125*

 EWAQ16..64

 EWYQ16..64

Every unit or group of units is connected through an RTD-W ModBus gateway (to be bought separately from Daikin) to the central control.

Moreover, the central control can control other components of the installation as explained in "2. General layout and setup of a system"

on page 2.

Installation and operation manual

Central control for hydroboxes

4P341705-1 – 2013.02

EKCC7-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 circuit

 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) 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 "Configuration" on page 4.) 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. Refer to Figure 3: System with integrated hot water tanks on

page 9 for a setup example.

1A~B Hydroboxes with integrated tank

3~5 Hydroboxes/inverter chillers

A Domestic hot water tanks (EKHTS200/260) B Non-return valve (field supply) C Backup heater (field supply) D Leaving water temperature to secondary circuit sensor

(supplied with EKCC7-W)

E Secondary circuit pump (field supply)

F Central control (supplied with EKCC7-W)

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. In this example, units 1A and 1B are controlled together, since they are connected to the same RTD-W. 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.

2. System with centralized domestic hot water tank 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.

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 configuration C (refer to ‘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 55°C.

Refer to Figure 2: System with centralized domestic hot water

tank on page 8 for a setup example.

1A~5 Hydroboxes/inverter chillers

A Centralized domestic hot water tank (field supply) B Domestic hot water sensor (Daikin option: EKCLWS) C Non-return valve (field supply) D 3-way valve for DHW (field supply) E Backup heater with integrated pump (field supply)

F Leaving water temperature to secondary circuit sensor

(supplied with EKCC7-W)

G Secondary circuit pump (field supply) H Central control (supplied with EKCC7-W)

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. In this example, units 1A and 1B are controlled together, since they are connected to the same RTD-W. 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. When domestic hot water heating is required, the central control will switch the 3-way valve for DHW and increase the setpoint of units 1A and 1B until the required domestic hot water temperature is reached.

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 8.

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-Ws. Also make sure to configure the addresses on the RTD-W correctly (refer to RTD-W manual).

 Digital inputs

In order to start the system in heating/cooling by an external voltage free contact, wire the following digital inputs:

- DI1-M (T10): Heating ON

- DI2-M (T10): Cooling ON

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.

- X1-M(T8): This voltage free input changes the value of the outdoor temperature at which the backup heater is allowed to operate. Also refer to "4.5. Backup heater?" on page 4.

- X2-M(T8): This voltage free input detects alarms of the backup heater.

EKCC7-W

Central control for hydroboxes

4P341705-1 – 2013.02

Installation and operation manual

 Analog inputs

- AI1-M(T7): Common leaving water sensor. This sensor measures the leaving water temperature to the secondary circuit. (Supplied with EKCC7-W).

- AI2-M(T7): Domestic hot water temperature. (Daikin option EKCLWS). Only if you have a centralized tank and DHW must be controlled by the central control.

 Digital outputs

- C3-DO3(T3): Contact to start the secondary pump. This contact closes whenever heating or cooling is ON.

- C4-DO4(T3): Contact to energize the 3-way valve for DHW. This contact closes when DHW heating is requested.

- C5-DO5(T4): Contact to start the backup heater. This contact closes when backup heater operation is requested.

- C8-DO8(T4): This contact closes when there is an alarm in the system (e.g. one of the heatpump units is in alarm, faulty common leaving water sensor, etc.).

- C9-DO9(T5): Heating operation. This contact closes when the system is in room heating mode.

- C10-D010(T5): 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 10 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.

4.2. Language

Select the desired language.

4.3. Operating modes?

Define the possible operating modes of the system.

 Heating only/Cooling only/Heating and cooling

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

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.

Installation and operation manual

1 DHW differential 2 SP tank (set by user) 3 Start tank heating 4 Stop tank heating

Central control for hydroboxes

4P341705-1 – 2013.02

EKCC7-W

4.5. Backup heater?

34 5

1°C

4.6. System layout?

Define here if the system has a backup heater or not. If so, select ‘Backup heating’ and define the backup heater method.

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.

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 00:00 are neglected.

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.

Configuration

Enter

 No of units installed: The number of units 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 units that can be controlled. Only the unit numbers entered above have to be configured. After restarting the central control, the list of units will be restricted to the number of units installed.

 Unit configuration:

For every unit, enter the following items (the number in the ‘Unit’ column corresponds to the address on the RTD-W).

• Group (GRP) Enter which group the indoor unit belongs to. Units 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 "2. General layout and setup of a system" on

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.

EKCC7-W

Central control for hydroboxes

4P341705-1 – 2013.02

Installation and operation manual

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