Daikin RGSQH10S18AA9W Installation manuals

Installer reference guide

ROTEX HPU ground

RGSQH10S18AA9W

Installer reference guide

ROTEX HPU ground

English

Table of Contents

6.4.3 Overview of electrical connections except external

actuators ..................................................................... 22

6.4.4 Overview of electrical connections for external and

internal actuators ........................................................ 23

1 General safety precautions 3

1.1 About the documentation........................................................... 3

1.1.1 Meaning of warnings and symbols.............................. 3

1.2 For the installer.......................................................................... 3

1.2.1 General ....................................................................... 3

1.2.2 Installation site ............................................................ 4

1.2.3 Refrigerant .................................................................. 4

1.2.4 Brine............................................................................ 5

1.2.5 Water .......................................................................... 5

1.2.6 Electrical ..................................................................... 5

2 About the documentation 5

2.1 About this document.................................................................. 5

2.2 Installer reference guide at a glance ......................................... 6

3 About the box 6

3.1 Overview: About the box ........................................................... 6

3.2 Indoor unit.................................................................................. 6

3.2.1 To unpack the indoor unit ........................................... 6

3.2.2 To remove the accessories from the indoor unit......... 6

4 About the units and options 7

4.1 Overview: About the units and options ...................................... 7

4.2 Identification .............................................................................. 7

4.2.1 Identification label: Indoor unit .................................... 7

4.3 Possible options for the indoor unit ........................................... 7

5 Application guidelines 8

5.1 Overview: Application guidelines............................................... 8

5.2 Setting up the space heating system......................................... 8

5.2.1 Single room................................................................. 8

5.2.2 Multiple rooms – One LWT zone ................................ 10

5.2.3 Multiple rooms – Two LWT zones............................... 12

5.3 Setting up an auxiliary heat source for space heating............... 13

5.4 Setting up the domestic hot water tank ..................................... 14

5.4.1 System layout – Integrated DHW tank........................ 14

5.4.2 Selecting the desired temperature for the DHW tank . 14

5.4.3 Setup and configuration – DHW tank.......................... 15

5.4.4 DHW pump for instant hot water................................. 15

5.4.5 DHW pump for disinfection ......................................... 15

5.5 Setting up the energy metering ................................................. 15

5.5.1 Produced heat............................................................. 15

5.5.2 Consumed energy....................................................... 16

5.5.3 Normal kWh rate power supply................................... 16

5.5.4 Preferential kWh rate power supply ............................ 16

5.6 Setting up the power consumption control ................................ 16

5.6.1 Permanent power limitation ........................................ 16

5.6.2 Power limitation activated by digital inputs ................. 17

5.6.3 Power limitation process ............................................. 17

5.7 Setting up an external temperature sensor ............................... 17

6 Preparation 18

6.1 Overview: Preparation ............................................................... 18

6.2 Preparing installation site .......................................................... 18

6.2.1 Installation site requirements of the indoor unit .......... 18

6.3 Preparing piping ........................................................................ 18

6.3.1 Circuit requirements.................................................... 18

6.3.2 Formula to calculate the expansion vessel pre-

pressure ...................................................................... 20

6.3.3 To check the water volume of the space heating

circuit and brine circuit ................................................ 20

6.3.4 Changing the pre-pressure of the expansion vessel... 21

6.3.5 To check the water volume: Examples ....................... 21

6.4 Preparing electrical wiring ......................................................... 21

6.4.1 About preparing electrical wiring................................. 21

6.4.2 About preferential kWh rate power supply .................. 22

7 Installation 23

7.1 Overview: Installation ................................................................ 23

7.2 Opening the units ...................................................................... 23

7.2.1 About opening the units .............................................. 23

7.2.2 To open the indoor unit ............................................... 23

7.2.3 To open the switch box cover of the indoor unit ......... 24

7.3 Mounting the indoor unit ............................................................ 24

7.3.1 About mounting the indoor unit ................................... 24

7.3.2 To install the indoor unit.............................................. 24

7.4 Connecting the brine piping....................................................... 26

7.4.1 About connecting the brine piping............................... 26

7.4.2 To connect the brine piping......................................... 26

7.4.3 To fill the brine circuit .................................................. 26

7.4.4 To connect the pressure relief valve to the drain on

the brine side .............................................................. 27

7.4.5 To insulate the brine piping......................................... 27

7.5 Connecting the water piping ...................................................... 27

7.5.1 About connecting the water piping.............................. 27

7.5.2 To connect the water piping........................................ 27

7.5.3 To connect the pressure relief valve to the drain ........ 28

7.5.4 To fill the space heating circuit.................................... 28

7.5.5 To fill the domestic hot water tank .............................. 28

7.5.6 To insulate the water piping ........................................ 29

7.5.7 To connect the recirculation piping ............................. 29

7.5.8 To connect the drain hose .......................................... 29

7.6 Connecting the electrical wiring................................................. 29

7.6.1 About connecting the electrical wiring......................... 29

7.6.2 About electrical compliance ........................................ 29

7.6.3 To connect the electrical wiring on the indoor unit...... 29

7.6.4 To connect the main power supply ............................. 31

7.6.5 To connect the remote outdoor sensor ....................... 31

7.6.6 To connect the user interface ..................................... 32

7.6.7 To connect the shut-off valve...................................... 33

7.6.8 To connect the electrical meters ................................. 33

7.6.9 To connect the domestic hot water pump ................... 33

7.6.10 To connect the alarm output ....................................... 34

7.6.11 To connect the space heating ON/OFF output ........... 34

7.6.12 To connect the changeover to external heat source ... 34

7.6.13 To connect the power consumption digital inputs ....... 34

7.7 Finishing the indoor unit installation .......................................... 35

7.7.1 To fix the user interface cover to the indoor unit......... 35

7.7.2 To close the indoor unit............................................... 35

8 Configuration 35

8.1 Overview: Configuration ............................................................ 35

8.1.1 To connect the PC cable to the switch box................. 35

8.1.2 To access the most used commands ......................... 36

8.1.3 To copy the system settings from the first to the

second user interface.................................................. 36

8.1.4 Quick wizard: Set the system layout after first power

ON............................................................................... 37

8.2 Basic configuration .................................................................... 37

8.2.1 Quick wizard: Language / time and date..................... 37

8.2.2 Quick wizard: Standard............................................... 37

8.2.3 Quick wizard: Options ................................................. 39

8.2.4 Quick wizard: Capacities (energy metering) ............... 41

8.2.5 Space heating control ................................................. 41

8.2.6 Domestic hot water control ......................................... 44

8.2.7 Contact/helpdesk number ........................................... 45

8.3 Advanced configuration/optimization......................................... 45

8.3.1 Space heating operation: advanced ........................... 45

8.3.2 Domestic hot water control: advanced........................ 47

8.3.3 Heat source settings ................................................... 50

8.3.4 System settings........................................................... 51

8.4 Menu structure: Overview user settings .................................... 53

8.5 Menu structure: Overview installer settings............................... 54

Installer reference guide

RGSQH10S18AA9W

ROTEX HPU ground

4P374245-1 – 2014.03

1 General safety precautions

9 Commissioning 56

9.1 Overview: Commissioning ......................................................... 56

9.2 Checklist before test run............................................................ 56

9.3 Air purge function on the space heating circuit.......................... 56

9.3.1 To perform a manual air purge ................................... 56

9.3.2 To perform an automatic air purge.............................. 57

9.3.3 To interrupt air purge .................................................. 57

9.4 To perform a test run ................................................................. 57

9.5 To perform an actuator test run ................................................. 57

9.5.1 Possible actuator test runs.......................................... 57

9.6 Underfloor heating screed dryout .............................................. 57

9.6.1 To program an underfloor heating screed dryout

schedule...................................................................... 58

9.6.2 To perform an underfloor heating screed dryout......... 58

9.6.3 To readout the status of an underfloor heating

screed dryout .............................................................. 58

9.6.4 To interrupt an underfloor heating screed dryout........ 58

10 Hand-over to the user 58

10.1 To fix the applicable language on the unit name plate .............. 59

11 Maintenance and service 59

11.1 Overview: Maintenance and service.......................................... 59

11.2 Maintenance safety precautions ................................................ 59

11.3 Checklist for yearly maintenance of the indoor unit ................... 59

11.3.1 To drain the domestic hot water tank .......................... 60

11.4 To drain the domestic hot water tank ........................................ 60

12 Troubleshooting 60

12.1 Overview: Troubleshooting ........................................................ 60

12.2 General guidelines..................................................................... 60

12.3 Solving problems based on symptoms ...................................... 61

12.3.1 Symptom: The unit is NOT heating as expected ........ 61

12.3.2 Symptom: The compressor does NOT start (space

heating or domestic water heating)............................. 61

12.3.3 Symptom: The pump is making noise (cavitation) ...... 61

12.3.4 Symptom: The pressure relief valve opens................. 62

12.3.5 Symptom: The pressure relief valve leaks .................. 62

12.3.6 Symptom: The space is NOT sufficiently heated at

low outdoor temperatures ........................................... 62

12.3.7 Symptom: The pressure at the tapping point is

temporarily unusual high............................................. 62

12.3.8 Symptom: Decoration panels are pushed away due

to a swollen tank ......................................................... 62

12.3.9 Symptom: Tank disinfection function is NOT

completed correctly (AH-error).................................... 62

12.4 Solving problems based on error codes .................................... 63

12.4.1 Error codes: Overview ................................................ 63

13 Disposal 64

14 Technical data 65

14.1 Overview: Technical data .......................................................... 65

14.2 Dimensions and service space .................................................. 65

14.2.1 Dimensions and service space: Indoor unit ................ 65

14.3 Components .............................................................................. 68

14.3.1 Components: Switch box (indoor unit) ........................ 68

14.4 Piping diagram........................................................................... 69

14.4.1 Piping diagram: Indoor unit ......................................... 69

14.5 Wiring diagram .......................................................................... 70

14.5.1 Wiring diagram: Indoor unit ......................................... 70

14.6 Technical specifications............................................................. 77

14.6.1 Technical specifications: Indoor unit ........................... 77

14.7 Operation range......................................................................... 78

14.7.1 Operation range: Indoor unit ....................................... 78

14.8 ESP curve.................................................................................. 80

14.8.1 ESP curve: Indoor unit ................................................ 80

15 Glossary 81

1 General safety precautions

1.1 About the documentation

▪ The original documentation is written in English. All other

languages are translations.

▪ The precautions described in this document cover very important

topics, follow them carefully.

▪ All activities described in the installation manual must be

performed by an authorized installer.

1.1.1 Meaning of warnings and symbols

DANGER

Indicates a situation that results in death or serious injury.

DANGER: RISK OF ELECTROCUTION

Indicates a situation that could result in electrocution.

DANGER: RISK OF BURNING

Indicates a situation that could result in burning because of extreme hot or cold temperatures.

WARNING

Indicates a situation that could result in death or serious injury.

CAUTION

Indicates a situation that could result in minor or moderate injury.

NOTICE

Indicates a situation that could result in equipment or property damage.

INFORMATION

Indicates useful tips or additional information.

1.2 For the installer

1.2.1 General

If you are not sure how to install or operate the unit, contact your dealer.

NOTICE

Improper installation or attachment of equipment or accessories could result in electric shock, short-circuit, leaks, fire or other damage to the equipment. Only use accessories, optional equipment and spare parts made or approved by ROTEX.

WARNING

Make sure installation, testing and applied materials comply with applicable legislation (on top of the instructions described in the ROTEX documentation).

CAUTION

Wear adequate personal protective equipment (protective gloves, safety glasses,…) when installing, maintaining or servicing the system.

RGSQH10S18AA9W ROTEX HPU ground 4P374245-1 – 2014.03

Installer reference guide

1 General safety precautions

WARNING

Tear apart and throw away plastic packaging bags so that nobody, especially children, can play with them. Possible risk: suffocation.

DANGER: RISK OF BURNING

▪ Do NOT touch the refrigerant piping, water piping or

internal parts during and immediately after operation. It could be too hot or too cold. Give it time to return to normal temperature. If you must touch it, wear protective gloves.

▪ Do NOT touch any accidental leaking refrigerant.

NOTICE

Provide adequate measures to prevent that the unit can be used as a shelter by small animals. Small animals that make contact with electrical parts can cause malfunctions, smoke or fire.

NOTICE

▪ Do NOT place any objects or equipment on top of the

unit.

▪ Do NOT sit, climb or stand on the unit.

In accordance with the applicable legislation, it might be necessary to provide a logbook with the product containing at least: information on maintenance, repair work, results of tests, stand-by periods,…

Also, at least, following information must be provided at an accessible place at the product:

▪ Instructions for shutting down the system in case of an emergency

▪ Name and address of fire department, police and hospital

▪ Name, address and day and night telephone numbers for

obtaining service

In Europe, EN378 provides the necessary guidance for this logbook.

1.2.2 Installation site

▪ Provide sufficient space around the unit for servicing and air

circulation.

▪ Make sure the installation site withstands the unit's weight and

vibration.

▪ Make sure the area is well ventilated.

▪ Make sure the unit is level.

▪ Make sure that the floor, where the unit will be installed, is level.

Do NOT install the unit in the following places:

▪ In potentially explosive atmospheres.

▪ In places where there is machinery that emits electromagnetic

waves. Electromagnetic waves may disturb the control system, and cause malfunction of the equipment.

▪ In places where there is a risk of fire due to the leakage of

flammable gases (example: thinner or gasoline), carbon fibre, ignitable dust.

▪ In places where corrosive gas (example: sulphurous acid gas) is

produced. Corrosion of copper pipes or soldered parts may cause the refrigerant to leak.

1.2.3 Refrigerant

NOTICE

Make sure the field piping and connections are not subjected to stress.

WARNING

During tests, NEVER pressurize the product with a pressure higher than the maximum allowable pressure (as indicated on the nameplate of the unit).

WARNING

Take sufficient precautions in case of refrigerant leakage. If refrigerant gas leaks, ventilate the area immediately. Possible risks:

▪ Excessive refrigerant concentrations in a closed room

can lead to oxygen deficiency.

▪ Toxic gas may be produced if refrigerant gas comes

into contact with fire.

WARNING

Always recover the refrigerants. Do NOT release them directly into the environment. Use a vacuum pump to evacuate the installation.

NOTICE

After all the piping has been connected, make sure there is no gas leak. Use nitrogen to perform a gas leak detection.

NOTICE

▪ Refrigerant cannot be charged until field wiring has

been completed.

▪ Refrigerant may only be charged after performing the

leak test and the vacuum drying.

▪ When charging a system, care shall be taken that its

maximum permissible charge is never exceeded, in view of the danger of liquid hammer.

▪ When the refrigerant system is to be opened,

refrigerant must be treated according to the applicable legislation.

▪ To avoid compressor breakdown, do not charge the refrigerant

more than the specified amount.

▪ In case re-charge is required, refer to the nameplate of the unit. It

states the type of refrigerant and necessary amount.

▪ The unit is factory charged with refrigerant and depending on pipe

sizes and pipe lengths some systems require additional charging of refrigerant.

▪ Only use tools exclusively for the refrigerant type used in the

system, this to ensure pressure resistance and prevent foreign materials from entering into the system.

▪ Charge the liquid refrigerant as follows:

If Then

A siphon tube is present

(i.e., the cylinder is marked with "Liquid filling siphon attached")

A siphon tube is NOT present Charge with the cylinder upside

Charge with the cylinder upright.

down.

NOTICE

Make sure refrigerant piping installation complies with applicable legislation. In Europe, EN378 is the applicable standard.

Installer reference guide

RGSQH10S18AA9W

ROTEX HPU ground

4P374245-1 – 2014.03

2 About the documentation

▪ Open refrigerant cylinders slowly.

▪ Charge the refrigerant in liquid form. Adding it in gas form may

prevent normal operation.

CAUTION

When the refrigerant charging procedure is done or when pausing, close the valve of the refrigerant tank immediately. If the tank is left with the valve open, the amount of refrigerant which is properly charged may get off point. More refrigerant may be charged by any remaining pressure after the unit has stopped.

1.2.4 Brine

If applicable. See the installation manual or installer reference guide of your application for more information.

WARNING

The selection of the brine MUST be in accordance with the applicable legislation.

WARNING

Take sufficient precautions in case of brine leakage. If brine leaks, ventilate the area immediately and contact your local dealer.

WARNING

The ambient temperature inside the unit can get much higher than that of the room, e.g. 70°C. In case of a brine leak, hot parts inside the unit can create a hazardous situation.

WARNING

The use and installation of the application MUST comply with the safety and environmental precautions specified in the applicable legislation.

1.2.5 Water

NOTICE

Make sure water quality complies with EU directive 98/83 EC.

1.2.6 Electrical

WARNING

▪ ONLY use copper wires.

▪ All field wiring must be performed in accordance with

the wiring diagram supplied with the product.

▪ NEVER squeeze bundled cables and make sure they

do not come in contact with the piping and sharp edges. Make sure no external pressure is applied to the terminal connections.

▪ Make sure to install earth wiring. Do NOT earth the unit

to a utility pipe, surge absorber, or telephone earth. Incomplete earth may cause electrical shock.

▪ Make sure to use a dedicated power circuit. NEVER

use a power supply shared by another appliance.

▪ Make sure to install the required fuses or circuit

breakers.

▪ Make sure to install an earth leakage protector. Failure

to do so may cause electric shock or fire.

▪ When installing the earth leakage protector, make sure

it is compatible with the inverter (resistant to high frequency electric noise) to avoid unnecessary opening of the earth leakage protector.

Install power cables at least 1 meter away from televisions or radios to prevent interference. Depending on the radio waves, a distance of 1 meter may not be sufficient.

WARNING

▪ After finishing the electrical work, confirm that each

electrical component and terminal inside the electrical components box is connected securely.

▪ Make sure all covers are closed before starting up the

unit.

NOTICE

Only applicable if the power supply is three-phase, and the compressor has an ON/OFF starting method.

If there exists the possibility of reversed phase after a momentary black out and the power goes on and off while the product is operating, attach a reversed phase protection circuit locally. Running the product in reversed phase can break the compressor and other parts.

DANGER: RISK OF ELECTROCUTION

▪ Turn OFF all power supply before removing the

switch box cover, connecting electrical wiring or touching electrical parts.

▪ Disconnect the power supply for more than 1 minute,

and measure the voltage at the terminals of main circuit capacitors or electrical components before servicing. The voltage MUST be less than 50 V DC before you can touch electrical components. For the location of the terminals, see the wiring diagram.

▪ Do NOT touch electrical components with wet hands.

▪ Do NOT leave the unit unattended when the service

cover is removed.

WARNING

If NOT factory installed, a main switch or other means for disconnection, having a contact separation in all poles providing full disconnection under overvoltage category III condition, shall be installed in the fixed wiring.

RGSQH10S18AA9W ROTEX HPU ground 4P374245-1 – 2014.03

2 About the documentation

2.1 About this document

Target audience

Authorised installers

Documentation set

This document is part of a documentation set. The complete set consists of:

Document Contains… Format

General safety precautions

Indoor unit installation manual

Safety instructions that you must read before installing

Installation instructions

Paper (in the box of the indoor unit)

Installer reference guide

3 About the box

Document Contains… Format

Installer reference guide

Addendum book for optional equipment

Latest revisions of the supplied documentation may be available on the regional ROTEX website or via your dealer.

Preparation of the installation, technical specifications, good practices, reference data, …

Additional info about how to install optional equipment

Digital files on the ROTEX homepage.

Paper (in the box of the indoor unit)

Digital files on the ROTEX homepage.

2.2 Installer reference guide at a glance

Chapter Description

General safety precautions

About the documentation What documentation exists for the

About the box How to unpack the units and remove

About the units and options

Application guidelines Various installation setups of the system

Preparation What to do and know before going

Installation What to do and know to install the

Configuration What to do and know to configure the

Commissioning What to do and know to commission the

Hand-over to the user What to give and explain to the user

Maintenance and service How to maintain and service the units

Troubleshooting What to do in case of problems

Disposal How to dispose of the system

Technical data Specifications of the system

Glossary Definition of terms

Safety instructions that you must read before installing

installer

their accessories

▪ How to identify the units

▪ Possible combinations of units and

options

on-site

system

system after it is installed

system after it is configured

3.2 Indoor unit

3.2.1 To unpack the indoor unit

3.2.2 To remove the accessories from the indoor unit

1 Remove the screws at the top of the unit.

2 Remove the top panel.

3 About the box

3.1 Overview: About the box

This chapter describes what you have to do after the box with the indoor unit is delivered on-site.

It contains information about:

▪ Unpacking and handling the units

▪ Removing the accessories from the units

Keep the following in mind:

▪ At delivery, the unit must be checked for damage. Any damage

must be reported immediately to the carrier's claims agent.

▪ Bring the packed unit as close as possible to its final installation

position to prevent damage during transport.

Installer reference guide

3 Remove the accessories.

RGSQH10S18AA9W

ROTEX HPU ground

4P374245-1 – 2014.03

4 About the units and options

a General safety precautions b Addendum book for optional equipment c Installation manual d Operation manual e Remote outdoor sensor

f User interface kit cover g Multilingual fluorinated greenhouse gases label h Cable for brine pressure switch connection

4 Reinstall the top panel.

4 About the units and options

4.1 Overview: About the units and options

This chapter contains information about:

▪ Identifying the indoor unit

▪ Combining the indoor unit with options

4.2 Identification

NOTICE

When installing or servicing several units at the same time, make sure NOT to switch the service panels between different models.

4.2.1 Identification label: Indoor unit

Location

▪ RKRUCBL4 contains following languages: English, Turkish,

Polish, Romanian.

Languages on the user interface can be uploaded by PC software or copied from an user interface to the other.

For installation instructions, see "7.6.6 To connect the user

interface" on page 32.

Room thermostat (RKRTWA, RKRTR1)

You can connect an optional room thermostat to the indoor unit. This thermostat can either be wired (RKRTWA) or wireless (RKRTR1).

For installation instructions, see the installation manual of the room thermostat and addendum book for optional equipment.

Remote sensor for wireless thermostat (EKRTETS)

You can use a wireless indoor temperature sensor (EKRTETS) only in combination with the wireless thermostat (RKRTR1).

For installation intructions, see the installation manual of the room thermostat and addendum book for optional equipment.

Digital I/O PCB (EKRP1HB)

The digital I/O PCB is required to provide following signals:

▪ Alarm output

▪ Space heating On/OFF output

▪ Changeover to external heat source

For installation instructions, see the installation manual of the digital I/O PCB and addendum book for optional equipment.

Demand PCB (EKRP1AHTA)

To enable the power saving consumption control by digital inputs you must install the demand PCB.

For installation instructions, see the installation manual of the demand PCB and addendum book for optional equipment.

Remote indoor sensor (KRCS01-1)

By default the internal user interface sensor will be used as room temperature sensor.

As an option the remote indoor sensor can be installed to measure the room temperature on another location.

For installation instructions, see the installation manual of the remote indoor sensor and addendum book for optional equipment.

4.3 Possible options for the indoor unit

User interface (RKRUCBL*)

The user interface and a possible additional user interface are available as an option.

The additional user interface can be connected:

▪ To have both:

▪ control close to the indoor unit,

▪ room thermostat functionality in the principal space to be

heated.

▪ To have an interface containing other languages.

Following user interfaces are available:

▪ RKRUCBL1 contains following languages: German, French,

Dutch, Italian.

▪ RKRUCBL2 contains following languages: English, Swedish,

Norwegian, Finnish.

▪ RKRUCBL3 contains following languages: English, Spanish,

Greek, Portuguese.

RGSQH10S18AA9W ROTEX HPU ground 4P374245-1 – 2014.03

INFORMATION

The remote indoor sensor can only be used in case the user interface is configured with room thermostat functionality.

PC configurator (EKPCCAB)

The PC cable makes a connection between the switch box of the indoor unit and a PC. It gives the possibility to upload different language files to the user interface and indoor parameters to the indoor unit. For the available language files, contact your local dealer.

The software and corresponding operating instructions are available on the ROTEX homepage.

For installation instructions, see the installation manual of the PC cable and "8 Configuration" on page 35.

Cable for brine pressure switch connection (EKGSCONBP1)

This cable is also delivered as accessory.

Depending on the applicable legislation, you might have to install a brine pressure switch (field supply). To connect the brine pressure switch to the unit, you can use the cable for brine pressure switch connection.

For installation instructions, see the installation manual of the cable for brine pressure switch connection.

Installer reference guide

5 Application guidelines

NOTICE

ROTEX recommends to use a mechanical brine pressure switch. If an electrical brine pressure switch is used, capacitive currents might disturb the flow switch operation causing an error on the unit.

5 Application guidelines

5.1 Overview: Application guidelines

The purpose of the application guidelines is to give a glance of the possibilities of the ROTEX heat pump system.

NOTICE

▪ The illustrations in the application guidelines are meant

for reference only, and are NOT to be used as detailed hydraulic diagrams. The detailed hydraulic dimensioning and balancing are NOT shown, and are the responsibility of the installer.

▪ For more information about the configuration settings to

optimize heat pump operation, see "8 Configuration" on

page 35.

INFORMATION

Energy metering functionality is NOT applicable and/or NOT valid for this unit if it is calculated by the unit. If optional external meters are used, energy metering display is valid.

This chapter contains applications guidelines for:

▪ Setting up the space heating system

▪ Setting up an auxiliary heat source for space heating

▪ Setting up the domestic hot water tank

▪ Setting up the energy metering

▪ Setting up the power consumption

▪ Setting up an external temperature sensor

5.2 Setting up the space heating system

The ROTEX heat pump system supplies leaving water to heat emitters in one or more rooms.

Because the system offers a wide flexibility to control the temperature in each room, you need to answer the following questions first:

▪ How many rooms are heated by the ROTEX heat pump system?

▪ Which heat emitter types are used in each room and what is their

design leaving water temperature?

Once the space heating requirements are clear, ROTEX recommends to follow the setup guidelines below.

NOTICE

If an external room thermostat is used, the external room thermostat will control the room frost protection. However, the room frost protection is only possible if the leaving water temperature control on the unit's user interface is turned ON.

5.2.1 Single room

Under floor heating or radiators – Wired room thermostat

Setup

A B

A Main leaving water temperature zone B One single room

a User interface used as room thermostat

▪ The under floor heating or radiators are directly connected to the

indoor unit.

▪ The room temperature is controlled by the user interface, which is

used as room thermostat. Possible installations:

▪ User interface (standard equipment) installed in the room and

used as room thermostat

▪ User interface (standard equipment) installed at the indoor unit

and used for control close to the indoor unit + user interface (optional equipment RKRUCBL*) installed in the room and used as room thermostat

Configuration

Setting Value

Unit temperature control:

▪ #: [A.2.1.7]

▪ Code: [C-07]

Number of water temperature zones:

▪ #: [A.2.1.8]

▪ Code: [7-02]

Benefits

▪ Cost effective. You do NOT need an additional external room

thermostat.

▪ Highest comfort and efficiency. The smart room thermostat

functionality can decrease or increase the desired leaving water temperature based on the actual room temperature (modulation). This results in:

▪ Stable room temperature matching the desired temperature

(higher comfort)

▪ Less ON/OFF cycles (more quiet, higher comfort and higher

efficiency)

▪ Lowest possible leaving water temperature (higher efficiency)

2 (RT control): Unit operation is decided based on the ambient temperature of the user interface.

0 (1 LWT zone): Main

Installer reference guide

RGSQH10S18AA9W

ROTEX HPU ground

4P374245-1 – 2014.03

5 Application guidelines

▪ Easy. You can easily set the desired room temperature via the

user interface:

▪ For your daily needs, you can use preset values and schedules.

▪ To deviate from your daily needs, you can temporarily overrule

the preset values and schedules, use the holiday mode…

Under floor heating or radiators – Wireless room thermostat

Setup

A B

A Main leaving water temperature zone B One single room

a Receiver for wireless external room thermostat b Wireless external room thermostat

▪ The under floor heating or radiators are directly connected to the

indoor unit.

▪ The room temperature is controlled by the wireless external room

thermostat (optional equipment RKRTR1).

Configuration

Setting Value

Unit temperature control:

▪ #: [A.2.1.7]

▪ Code: [C-07]

Number of water temperature zones:

▪ #: [A.2.1.8]

▪ Code: [7-02]

External room thermostat for the main zone:

▪ #: [A.2.2.4]

▪ Code: [C-05]

Benefits

▪ Wireless. The ROTEX external room thermostat is available in a

wireless version.

▪ Efficiency. Although the external room thermostat only sends ON/

OFF signals, it is specifically designed for the heat pump system.

1 (Ext RT control): Unit operation is decided by the external thermostat.

0 (1 LWT zone): Main

1 (Thermo ON/OFF): When the used external room thermostat or heat pump convector can only send a thermo ON/OFF condition.

Heat pump convectors

Setup

A B

A Main leaving water temperature zone B One single room

a Remote controller of the heat pump convectors

▪ The heat pump convectors are directly connected to the indoor

unit.

▪ The desired room temperature is set via the remote controller of

the heat pump convectors.

▪ The space heating demand signal is sent to one digital input on

the indoor unit (X2M/1 and X2M/4).

▪ The space operation mode is sent to the heat pump convectors by

one digital output on the indoor unit (X2M/33 and X2M/34).

INFORMATION

When using multiple heat pump convectors, make sure each one receives the infrared signal from the remote controller of the heat pump convectors.

Configuration

Setting Value

Unit temperature control:

▪ #: [A.2.1.7]

▪ Code: [C-07]

Number of water temperature zones:

▪ #: [A.2.1.8]

▪ Code: [7-02]

External room thermostat for the main zone:

▪ #: [A.2.2.4]

▪ Code: [C-05]

Benefits

▪ Efficiency. Optimal energy efficiency because of the interlink

function.

▪ Stylish.

1 (Ext RT control): Unit operation is decided by the external thermostat.

0 (1 LWT zone): Main

1 (Thermo ON/OFF): When the used external room thermostat or heat pump convector can only send a thermo ON/OFF condition.

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5 Application guidelines

5.2.2 Multiple rooms – One LWT zone

If only one leaving water temperature zone is needed because the design leaving water temperature of all heat emitters is the same, you do NOT need a mixing valve station (cost effective).

Example: If the heat pump system is used to heat up one floor where all the rooms have the same heat emitters.

Under floor heating or radiators – Thermostatic valves

If you are heating up rooms with under floor heating or radiators, a very common way is to control the temperature of the main room by using a thermostat (this can either be the user interface or an external room thermostat), while the other rooms are controlled by so-called thermostatic valves, which open or close depending on the room temperature.

Setup

A BC

A Main leaving water temperature zone B Room 1 C Room 2

a User interface

▪ The under floor heating of the main room is directly connected to

the indoor unit.

▪ The room temperature of the main room is controlled by the user

interface used as thermostat.

▪ A thermostatic valve is installed before the under floor heating in

each of the other rooms.

INFORMATION

Mind situations where the main room can be heated by another heating source. Example: Fireplaces.

Configuration

Setting Value

Unit temperature control:

▪ #: [A.2.1.7]

▪ Code: [C-07]

Number of water temperature zones:

▪ #: [A.2.1.8]

▪ Code: [7-02]

2 (RT control): Unit operation is decided based on the ambient temperature of the user interface.

0 (1 LWT zone): Main

Under floor heating or radiators – Multiple external room thermostats

Setup

A BC

M2M1

A Main leaving water temperature zone B Room 1 C Room 2

a External room thermostat b Bypass valve

▪ For each room, a shut-off valve (field supplied) is installed to avoid

leaving water supply when there is no heating demand.

▪ A bypass valve must be installed to make water recirculation

possible when all shut-off valves are closed.

▪ The user interface connected to the indoor unit decides the space

operation mode. Mind that the operation mode on each room thermostat must be set to match the indoor unit.

▪ The room thermostats are connected to the shut-off valves, but do

NOT have to be connected to the indoor unit. The indoor unit will supply leaving water all the time, with the possibility to program a leaving water schedule.

Configuration

Setting Value

Unit temperature control:

▪ #: [A.2.1.7]

▪ Code: [C-07]

Number of water temperature zones:

▪ #: [A.2.1.8]

▪ Code: [7-02]

Benefits

Compared with under floor heating or radiators for one room: ▪ Comfort. You can set the desired room temperature, including

schedules, for each room via the room thermostats.

1 (Ext RT control): Unit operation is decided by the external thermostat.

0 (1 LWT zone): Main

Benefits

▪ Cost effective.

▪ Easy. Same installation as for one room, but with thermostatic

valves.

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5 Application guidelines

Heat pump convectors

Setup

A B

A Main leaving water temperature zone B Room 1 C Room 2

a Remote controller of the heat pump convectors

▪ The desired room temperature is set via the remote controller of

the heat pump convectors.

▪ The user interface connected to the indoor unit decides the space

operation mode.

▪ The heating demand signals of each heat pump convector are

connected in parallel to the digital input on the indoor unit (X2M/1 and X2M/4). The indoor unit will only supply leaving water temperature when there is an actual demand.

INFORMATION

To increase comfort and performance, ROTEX recommends to install the valve kit option EKVKHPC on each heat pump convector.

Configuration

Setting Value

Unit temperature control:

▪ #: [A.2.1.7]

▪ Code: [C-07]

Number of water temperature zones:

▪ #: [A.2.1.8]

▪ Code: [7-02]

Benefits

Compared with heat pump convectors for one room: ▪ Comfort. You can set the desired room temperature, including

schedules, for each room via the remote controller of the heat pump convectors.

1 (Ext RT control): Unit operation is decided by the external thermostat.

0 (1 LWT zone): Main

Combination: Under floor heating + Heat pump convectors

Setup

A BC

A Main leaving water temperature zone B Room 1 C Room 2

a External room thermostat

b Remote controller of the heat pump convectors

▪ For each room with heat pump convectors: The heat pump

convectors are directly connected to the indoor unit.

▪ For each room with under floor heating: A shut-off valve (field

supply) is installed before the under floor heating. It prevents hot water supply when the room has no heating demand.

▪ For each room with heat pump convectors: The desired room

temperature is set via the remote controller of the heat pump convectors.

▪ For each room with under floor heating: The desired room

temperature is set via the external room thermostat (wired or wireless).

▪ The user interface connected to the indoor unit decides the space

operation mode. Mind that the operation mode on each external room thermostat and remote controller of the heat pump convectors must be set to match the indoor unit.

INFORMATION

To increase comfort and performance, ROTEX recommends to install the valve kit option EKVKHPC on each heat pump convector.

Configuration

Setting Value

Unit temperature control:

▪ #: [A.2.1.7]

▪ Code: [C-07]

Number of water temperature zones:

▪ #: [A.2.1.8]

▪ Code: [7-02]

0 (LWT control): Unit operation is decided based on the leaving water temperature.

0 (1 LWT zone): Main

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5 Application guidelines

5.2.3 Multiple rooms – Two LWT zones

If the heat emitters selected for each room are designed for different leaving water temperatures, you can use different leaving water temperature zones (maximum 2).

In this document:

▪ Main zone = Zone with the lowest design temperature

▪ Additional zone = The other zone

CAUTION

When there is more than one leaving water zone, you must ALWAYS install a mixing valve station in the main zone to decrease (in heating) the leaving water temperature when the additional zone has demand.

Typical example:

Room (zone) Heat emitters: Design

temperature

Living room (main zone) Under floor heating: 35°C

Bed rooms (additional zone) Heat pump convectors: 45°C

Setup

A B

A Additional leaving water temperature zone B Room 1 C Room 2 D Main leaving water temperature zone E Room 3

a Remote controller of the heat pump convectors b User interface c Mixing valve station d Pressure regulating valve

INFORMATION

A pressure regulating valve should be implemented before the mixing valve station. This is to guarantee the correct water flow balance between the main leaving water temperature zone and the additional leaving water temperature zone in relation to the required capacity of both water temperature zones.

▪ For the main zone:

▪ A mixing valve station is installed before the under floor heating.

▪ The pump of the mixing valve station is controlled by the ON/

OFF signal on the indoor unit (X2M/5 and X2M/7; normal closed shut-off valve output).

▪ The room temperature is controlled by the user interface, which

is used as room thermostat.

▪ For the additional zone:

▪ The heat pump convectors are directly connected to the indoor

unit.

▪ The desired room temperature is set via the remote controller of

the heat pump convectors for each room.

▪ The heating demand signals of each heat pump convector are

connected in parallel to the digital input on the indoor unit (X2M/1 and X2M/4). The indoor unit will only supply the desired additional leaving water temperature when there is an actual demand.

▪ The user interface connected to the indoor unit decides the space

operation mode. Mind that the operation mode on each remote controller of the heat pump convectors must be set to match the indoor unit.

Configuration

Setting Value

Unit temperature control:

▪ #: [A.2.1.7]

▪ Code: [C-07]

2 (RT control): Unit operation is decided based on the ambient temperature of the user interface.

Note:

▪ Main room = user interface

used as room thermostat functionality

▪ Other rooms = external room

thermostat functionality

Number of water temperature zones:

1 (2 LWT zones): Main + additional

▪ #: [A.2.1.8]

▪ Code: [7-02]

In case of heat pump convectors:

External room thermostat for the additional zone:

▪ #: [A.2.2.5]

1 (Thermo ON/OFF): When the used external room thermostat or heat pump convector can only send a thermo ON/OFF condition.

▪ Code: [C-06]

Shut-off valve output Set to follow the thermo demand

of the main zone.

At the mixing valve station Set the desired main leaving

water temperature.

Benefits

▪ Comfort.

▪ The smart room thermostat functionality can decrease or

increase the desired leaving water temperature based on the actual room temperature (modulation).

▪ The combination of the two heat emitter systems provides the

excellent heating comfort of the under floor heating, and the rapid air heat up of the heat pump convectors (e.g., living room=under floor heating and the bedroom=convector (no continuous heating)).

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5 Application guidelines

▪ Efficiency.

▪ Depending on the demand, the indoor unit supplies different

leaving water temperature matching the design temperature of the different heat emitters.

▪ Under floor heating has the best performance with ROTEX

HPSU.

5.3 Setting up an auxiliary heat source for space heating

▪ Space heating can be done by:

▪ The indoor unit

▪ An auxiliary boiler (field supply) connected to the system

▪ When the room thermostat requests heating, the indoor unit or the

auxiliary boiler starts operating depending on the outdoor temperature (status of the changeover to external heat source). When the permission is given to the auxiliary boiler, the space heating by the indoor unit is turned OFF.

▪ Bivalent operation is only possible for space heating, NOT for

domestic hot water production. Domestic hot water is always produced by the DHW tank connected to the indoor unit.

INFORMATION

▪ During heating operation of the heat pump, the

heat pump operates to achieve the desired temperature set via 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 auxiliary boiler, the

auxiliary boiler operates to achieve the desired water temperature set via the auxiliary boiler controller.

Setup

▪ Integrate the auxiliary boiler as follows:

b b

a Indoor unit b Heat exchanger c Backup heater d Pump e Shut-off valve

f Non-return valve (field supply) g Shut-off valve (field supply) h Collector (field supply)

i Auxiliary boiler (field supply)

j Aquastat valve (field supply)

FHL1...3 Under floor heating

FHL1

FHL2

FHL3

NOTICE

▪ Make sure the auxiliary boiler and its integration in the

system complies with applicable legislation.

▪ ROTEX is NOT responsible for incorrect or unsafe

situations in the auxiliary boiler system.

▪ Make sure the return water to the heat pump does NOT exceed

55°C. To do so:

▪ Set the desired water temperature via the auxiliary boiler

controller to maximum 55°C.

▪ Install an aquastat valve in the return water flow of the

heat pump.

▪ Set the aquastat valve to close above 55°C and to open below

55°C.

▪ Install non-return valves.

▪ Make sure to only have one expansion vessel in the water circuit.

An expansion vessel is already premounted in the indoor unit.

▪ Install the digital I/O PCB (option EKRP1HB).

▪ Connect X1 and X2 (changeover to external heat source) on the

PCB to the auxiliary boiler thermostat.

▪ To setup the heat emitters, see "5.2 Setting up the space heating

system" on page 8.

Configuration

Via the user interface (quick wizard):

▪ Set the use of a bivalent system as external heat source.

▪ Set the bivalent temperature and hysteresis.

NOTICE

▪ Make sure the bivalent hysteresis has enough

differential to prevent frequent changeover between indoor unit and auxiliary boiler.

▪ Frequent changeover may cause corrosion of the

auxiliary boiler. Contact the manufacturer of the auxiliary boiler for more information.

Changeover to external heat source decided by an auxiliary contact

▪ Only possible in external room thermostat control AND one

leaving water temperature zone (see "5.2 Setting up the space

heating system" on page 8).

▪ The auxiliary contact can be:

▪ An outdoor temperature thermostat

▪ An electricity tariff contact

▪ A manually operated contact

▪ …

▪ Setup: Connect the following field wiring:

Com

Indoor/Auto/Boiler

K2AK1A

Indoor

X2M

1234 XY

K2AK1A

BTIBoiler thermostat input

A Auxiliary contact (normal closed)

H Heating demand room thermostat (optional) K1A Auxiliary relay for activation of indoor unit (field supply) K2A Auxiliary relay for activation of boiler (field supply)

Indoor Indoor unit

Auto Automatic

Boiler Boiler

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5 Application guidelines

NOTICE

▪ Make sure the auxiliary contact has enough differential

or time delay to prevent frequent changeover between indoor unit and auxiliary boiler.

▪ If the auxiliary contact is an outdoor temperature

thermostat, install the thermostat in the shadow so that it is NOT influenced or turned ON/OFF by direct sunlight.

▪ Frequent changeover may cause corrosion of the

auxiliary boiler. Contact the manufacturer of the auxiliary boiler for more information.

5.4 Setting up the domestic hot water tank

5.4.1 System layout – Integrated DHW tank

hgg

a e

FHL1

FHL2

FHL3

5.4.2 Selecting the desired temperature for the DHW tank

People experience water as hot when its temperature is 40°C. Therefore, the DHW consumption is always expressed as equivalent hot water volume at 40°C. However, you can set the DHW tank temperature at a higher temperature (example: 53°C), which is then mixed with cold water (example: 15°C).

Selecting the volume and desired temperature for the DHW tank consists of:

1 Determining the DHW consumption (equivalent hot water

volume at 40°C).

2 Determining the volume and desired temperature for the DHW

tank.

Possible DHW tank volumes

Type Possible volumes

Integrated DHW tank ▪ 180 l

Energy saving tips

▪ If the DHW consumption differs from day to day, you can program

a weekly schedule with different desired DHW tank temperatures for each day.

▪ The lower the desired DHW tank temperature, the more cost

effective.

▪ The heat pump itself can produce domestic hot water of maximum

55°C. The electrical resistance integrated in the heat pump can higher this temperature. However, this consumes more energy. ROTEX recommends to set the desired DHW tank temperature below 55°C to avoid using the electrical resistance.

▪ When the heat pump produces domestic hot water, it cannot heat

up a space. When you need domestic hot water and space heating at the same, ROTEX recommends to produce the domestic hot water during the night when there is lower space heating demand.

Determining the DHW consumption

Answer the following questions and calculate the DHW consumption (equivalent hot water volume at 40°C) using the typical water volumes:

a Indoor unit b Heat exchanger c Backup heater d Pump e Motorised 3-way valve

f DHW tank g Shut-off valve h Collector (field supply)

FHL1...3 Under floor heating

UI User interface

Question Typical water volume

How many showers are needed per day?

How many baths are needed per day?

How much water is needed at the kitchen sink per day?

Are there any other domestic hot water needs?

Example: If the DHW consumption of a family (4 persons) per day is as follows:

▪ 3 showers

▪ 1 bath

▪ 3 sink volumes

Then the DHW consumption = (3×100 l)+(1×150 l)+(3×10 l)=480 l

1 shower=10 min×10 l/min=100 l

1 bath=150 l

1 sink=2 min×5 l/min=10 l

—

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5 Application guidelines

Determining the volume and desired temperature for the DHW tank

Formula

Example

V1=V2+V2×(T2−40)/(40−T1) If:

▪ V2=180 l

▪ T2=54°C

▪ T

=15°C

Then V1=280 l

V2=V1×(40−T1)/(T2−T1) If:

▪ V

=480 l

=54°C

▪ T

▪ T1=15°C

Then V2=307 l

V1DHW consumption (equivalent hot water volume at 40°C)

Required DHW tank volume if only heated once

DHW tank temperature

Cold water temperature

5.4.3 Setup and configuration – DHW tank

▪ For large DHW consumptions, you can heat up the DHW tank

several times during the day.

▪ To heat up the DHW tank to the desired DHW tank temperature,

you can use the following energy sources:

▪ Thermodynamic cycle of the heat pump

▪ Electrical backup heater

▪ For more information about optimizing the energy consumption for

producing domestic hot water, see "8 Configuration" on page 35.

5.4.4 DHW pump for instant hot water

Setup

▪ By connecting a DHW pump, instant hot water can be available at

the tap.

▪ The DHW pump and the installation are field supply and the

responsibility of the installer.

▪ For more information about connecting the recirculation

connection: see "7 Installation" on page 23.

Configuration

▪ For more information, see "8 Configuration" on page 35.

▪ You can program a schedule to control the DHW pump via the

user interface. For more information, see the user reference guide.

a DHW tank b DHW pump c Shower d Cold water e Domestic hot water OUT

f Recirculation connection

5.4.5 DHW pump for disinfection

Setup

c e

a DHW tank

b DHW pump

c Heater element

d Non-return valve

e Shower

f Cold water g Domestic hot water OUT h Recirculation connection

▪ The DHW pump and the installation are field supply and the

responsibility of the installer.

▪ The temperature of the DHW tank can be set to maximum 60°C. If

applicable legislation requires higher temperature for disinfection, you can connect a DHW pump and heater element as shown above.

▪ If applicable legislation requires disinfection of the water piping

until the tapping point, you can connect a DHW pump and heater element (if needed) as shown above.

Configuration

The indoor unit can control DHW pump operation. For more information, see "8 Configuration" on page 35.

5.5 Setting up the energy metering

▪ Via the user interface, you can read out the following energy data:

▪ Produced heat

▪ Consumed energy

▪ You can read out the energy data:

▪ For space heating

▪ For domestic hot water production

▪ You can read out the energy data:

▪ Per month

▪ Per year

INFORMATION

The calculated produced heat and consumed energy are an estimation, the accuracy cannot be guaranteed.

5.5.1 Produced heat

INFORMATION

The sensors used to calculate the produced heat are calibrated during the "Pump test (space heating)" actuator test run. The calibration is reset when the software is updated.

▪ The produced heat is calculated internally based on:

▪ The leaving and entering water temperature

▪ The flow rate

▪ Setup and configuration: No additional equipment needed.

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5 Application guidelines

5.5.2 Consumed energy

Measuring the consumed energy

▪ Requires external power meters.

▪ Setup and configuration:

▪ For the specifications of each type of meter, see "14 Technical

data" on page 65.

▪ When using electrical power meters, set the number of pulses/

kWh for each power meter via the user interface. Consumed energy data will only be available if this setting is configured.

INFORMATION

When measuring the electrical power consumption, make sure ALL power input of the system is covered by the electrical power meters.

5.5.3 Normal kWh rate power supply

General rule

One power meter that covers the entire system is sufficient.

Setup

Connect the power meter to X5M/7 and X5M/8.

Power meter type

Use a three-phase power meter.

Example

450896.005

5.5.4 Preferential kWh rate power supply

Setup

▪ Connect power meter 1 to X5M/7 and X5M/8.

▪ Connect power meter 2 to X5M/9 and X5M/10.

Refer to "6.4.3 Overview of electrical connections except external

actuators" on page 22.

5.6 Setting up the power consumption control

▪ The power consumption control:

▪ Allows you to limit the power consumption of the entire system

(sum of indoor unit and backup heater).

▪ Configuration: Set the power limitation level and how it has to

be achieved via the user interface.

▪ The power limitation level can be expressed as:

▪ Maximum running current (in A)

▪ Maximum power input (in kW)

▪ The power limitation level can be activated:

▪ Permanently

▪ By digital inputs

INFORMATION

▪ During emergency operation, the power consumption

control will NOT be used. This is because the backup heater has a higher capacity then during normal operation (9 kW instead of 6 kW) and therefore the power calculated by the unit will be lower then the actual power.

▪ If power limitation is enabled, water temperature set

points above 60°C in space heating are NOT guaranteed.

A Indoor unit

a Electrical cabinet (L b Power meter (L c Fuse (L d Backup heater (L e Indoor unit (L

1/L2/L3

/N)

1/L2/L3

/N)

Exception

▪ You can use a second power meter if:

▪ The power range of one meter is insufficient.

▪ The electrical meter cannot easily be installed in the electrical

cabinet.

▪ Connection and setup:

▪ Connect the second power meter to X5M/9 and X5M/10.

▪ In the software the power consumption data of both meters is

added so you do NOT have to set which meter covers which power consumption. You only need to set the number of pulses of each power meter.

▪ See "5.5.4 Preferential kWh rate power supply" on page 16 for

an example with two power meters.

5.6.1 Permanent power limitation

Permanent power limitation is useful to assure a maximum power or current input of the system. In some countries, legislation limits the maximum power consumption for space heating and DHW production.

Setup and configuration

▪ No additional equipment needed.

▪ Set the power consumption control settings as described in "To

PiPower input

t Time

DI Digital input (power limitation level)

a Power limitation active b Actual power input

modify an overview setting" on page 36 via the user interface

(for the description of all settings, see "8 Configuration" on page

35):

▪ Select full time limitation mode

▪ Select the type of limitation (power in kW or current in A)

▪ Set the desired power limitation level

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5 Application guidelines

NOTICE

Set a minimum power consumption of ±3 kW to guarantee space heating and DHW production by allowing at least backup heater step 1.

5.6.2 Power limitation activated by digital inputs

Power limitation is also useful in combination with an energy management system.

The power or current of the entire ROTEX system is limited dynamically by digital inputs. Power limitation level is set via the user interface by limiting one of the following:

▪ Current (in A)

▪ Power input (in kW)

The energy management system (field supply) decides the activation of a certain power limitation level. Example: To limit the maximum power of the entire house (lighting, domestic appliances, space heating…).

4 3 2

A8P

A Indoor unit B Energy management system

a Power limitation activation (4 digital inputs) b Backup heater

DI4

DI3

DI1

Setup

▪ Demand PCB (option EKRP1AHTA) needed.

▪ Maximum four digital inputs are used to activate the

▪ For the specification and the connection of the digital inputs, see

Configuration

Set the power consumption control settings as described in "To

modify an overview setting" on page 36 via the user interface (for

the description of all settings, see "8 Configuration" on page 35):

▪ Select activation by digital inputs.

▪ Select the type of limitation (power in kW or current in A).

▪ Set the desired power limitation level corresponding to each digital

PiPower input

t Time

DI Digital inputs (power limitation levels)

a Power limitation active b Actual power input

corresponding power limitation level:

▪ DI1 = weakest limitation (highest energy consumption)

▪ DI4 = strongest limitation (lowest energy consumption)

"14.5 Wiring diagram – components: Indoor unit" on page 70.

input.

INFORMATION

In case more than 1 digital input is closed (at the same time), the digital input priority is fixed: DI4 priority>…>DI1.

5.6.3 Power limitation process

The compressor has better efficiency than the electrical heater. Therefore, the electrical heater is limited and turned OFF first. The system limits power consumption in the following order:

1 Limits electrical heater.

2 Turn OFF the electrical heater.

3 Limits the compressor.

4 Turns OFF the compressor.

Example

PhProduced heat C

Consumed energy

A Compressor B Backup heater

a Limited compressor operation

b Full compressor operation

c Backup heater step 1 turned ON

d Backup heater step 2 turned ON

5.7 Setting up an external temperature sensor

Indoor ambient temperature

You can connect one external temperature sensor. It can measure the indoor ambient temperature. ROTEX recommends to use an external temperature sensor in the following cases:

▪ In room thermostat control, the user interface is used as room

thermostat and it measures the indoor ambient temperature. Therefore, the user interface must be installed on a location:

▪ Where the average temperature in the room can be detected

▪ That is NOT exposed to direct sunlight

▪ That is NOT near a heat source

▪ That is NOT affected by outside air or air draught because of,

for example, door opening/closing

▪ If this is NOT possible, ROTEX recommends to connect a remote

indoor sensor (option KRCS01-1).

▪ Setup: For installation instructions, see the installation manual of

the remote indoor sensor.

▪ Configuration: Select room sensor [A.2.2.B].

Outdoor ambient temperature

The remote outdoor sensor (delivered as accessory) measures the outdoor ambient temperature.

▪ Setup:

▪ To install the remote outdoor sensor outside, see the

installation manual of the sensor (delivered as accessory).

▪ To connect the remote outdoor sensor to the indoor unit, see

"7.6.5 To connect the remote outdoor sensor" on page 31.

▪ Configuration: None.

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6 Preparation

6.1 Overview: Preparation

This chapter describes what you have to do and know before going on-site.

It contains information about:

▪ Preparing the installation site

▪ Preparing the piping

▪ Preparing the electrical wiring

6.2 Preparing installation site

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.

Choose the installation location with sufficient place for carrying the unit in and out of the site.

6.2.1 Installation site requirements of the indoor unit

INFORMATION

Also read the precautions and requirements in the "General safety precautions" chapter.

▪ Mind the following spacing installation guidelines:

6.3 Preparing piping

6.3.1 Circuit requirements

INFORMATION

Also read the precautions and requirements in the "General safety precautions" chapter.

Circuit types. Except for the refrigerant circuit, inside the unit 2 other circuits are included. For future references: the circuit connected to the bore hole is referred to as the brine circuit, the other circuit connected to the heating emitters is referred to as the space heating circuit.

▪ Connecting piping – Legislation. Make all piping connections in

accordance with the applicable legislation and the instructions in the "Installation" chapter, respecting the water inlet and outlet.

▪ Connecting piping – Force. Do NOT use excessive force when

connecting the piping. Deformation of the piping can cause malfunctioning of the unit.

▪ Connecting piping – Tools. Only use appropriate tooling to

handle brass, which is a soft material. If NOT, pipes will get damaged.

▪ Connecting piping – Air, moisture, dust. If air, moisture or dust

gets into the circuit, problems may occur. To prevent this:

▪ Only use clean pipes

▪ Hold the pipe end downwards when removing burrs.

▪ Cover the pipe end when inserting it through a wall, to prevent

dust and/or particles entering the pipe.

▪ Use a decent thread sealant to seal connections.

▪ Closed circuit. Use the indoor unit ONLY in a closed water

system for brine circuit and space heating circuit. Using the system in an open water system will lead to excessive corrosion.



>500

(mm)

Do NOT install the unit in places such as:

▪ 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.

▪ Sound sensitive areas (e.g. near a bedroom and the like), so that

the operation noise will cause no trouble.

▪ The foundation must be strong enough to bear the weight of the

unit. Take the weight of the unit with a domestic hot water tank full of water into account. Make sure, in the event of a water leak, water cannot cause any damage to the installation space and surroundings.

▪ In places with high humidity (max. RH=85%), for example a

bathroom.

▪ In places where frost is possible. Ambient temperature around the

indoor unit should be >5°C.

▪ The indoor unit is designed for indoor installation only and for

ambient temperatures ranging 5~30°C in heating mode.

WARNING

When connecting to an open groundwater system, an intermediate heat exchanger is required to prevent damage (dirt, freeze ups) to the unit.

▪ Glycol. For safety reasons, it is NOT allowed to add any kind of

glycol to the space heating circuit.

▪ Piping length. It is recommended to avoid long runs of piping

between the domestic hot water tank and the hot water end point (shower, bath,…) and to avoid dead ends.

▪ Piping diameter. Select the piping diameter in relation to the

required flow and the available external static pressure of the pump. See "14 Technical data" on page 65 for the external static pressure curves of the indoor unit.

▪ Fluid flow. You can find the minimum required water for the

indoor unit operation in the following table. When the flow is lower, flow error 7H will be displayed and the indoor unit will be stopped.

Model Minimum flow

10 ▪ Space heating circuit: 8 l/min

▪ Brine circuit: 25 l/min

▪ Field supply components – Fluid. Only use materials that are

compatible with fluid used in the system and with the materials used in the indoor unit.

▪ Field supply components – Fluid pressure and temperature.

Check that all components in the field piping can withstand the fluid pressure and fluid temperature.

▪ Fluid pressure – Space heating and brine circuit. The

maximum fluid pressure of the space heating and brine circuit is 4 bar. Provide adequate safeguards in the water circuit to ensure that the maximum pressure is NOT exceeded.

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6 Preparation

▪ Fluid pressure – Domestic hot water tank. The maximum fluid

pressure of the domestic hot water tank is 10 bar. Provide adequate safeguards in the water circuit to ensure that the maximum pressure is NOT exceeded.

▪ Fluid temperature. All installed piping and piping accessories

(valve, connections,…) MUST withstand the following temperatures:

INFORMATION

The following illustration is an example and may NOT match your system layout.

65°C

70°C

FCU1

FCU2

FCU3

b bd

a Indoor unit b Heat exchanger c Backup heater d Pump e Stop valve

f Motorised 3-way valve g Motorised 2-way valve (field supply) h Collector

i Domestic hot water tank

j Heat exchanger coil

FCU1...3 Fan coil unit (optional)

FHL1...3 Floor heating loop

FHL1

FHL2

FHL3

▪ Drainage – Low points. Provide drain taps at all low points of the

system in order to allow complete drainage of the circuit.

▪ Drainage – Pressure relief valve. Provide a proper drain for the

pressure relief valve to avoid fluid dripping out of the unit. See

"7.5.3 To connect the pressure relief valve to the drain" on page

28.

WARNING

▪ All pipe work connected to the brine pressure relief

valve MUST have a continuous fall.

▪ The discharge pipe from the brine pressure relief valve

MUST terminate in a safe, visible position without forming any risk to persons in the vicinity.

▪ Air vents. Provide air vents at all high points of the system, which

must also be easily accessible for servicing. At the space heating side, an automatic air purge is provided in the indoor unit. Check that the air purge is NOT tightened too much, so that automatic release of air in the water circuit is possible.

▪ Zn-coated parts. NEVER use Zn-coated parts in the fluid circuit.

Because the unit's internal circuit uses copper piping, excessive corrosion may occur. Zn coated parts used in the brine circuit may lead to the precipitation of certain components in the anti-freeze fluids corrosion inhibitor.

WARNING

Due to presence of glycol, corrosion of the system is possible. Uninhibited glycol will turn acidic under the influence of oxygen. This process is accelerated by the presence of copper and high temperatures. The acidic uninhibited glycol attacks metal surfaces and forms galvanic corrosion cells that cause severe damage to the system. Therefore it is important that:

▪ the water treatment is correctly executed by a qualified

water specialist,

▪ a glycol with corrosion inhibitors is selected to

counteract acids formed by the oxidation of glycols,

▪ no automotive glycol is used because their corrosion

inhibitors have a limited lifetime and contain silicates which can foul or plug the system,

▪ galvanized pipes are NOT used in glycol systems since

the presence may lead to the precipitation of certain components in the glycol's corrosion inhibitor.

INFORMATION

Be aware of the hygroscopic property of anti-freeze fluids: it absorbs moisture from its environment. Leaving the cap off the anti-freeze fluid container causes the concentration of water to increase. The anti-freeze fluid concentration is then lower than assumed. And in consequence, freezing can happen after all.

Preventive actions MUST be taken to ensure minimal exposure of the anti-freeze fluid to air.

▪ Non-brass metallic piping. When using non-brass metallic

piping, insulate the brass and non-brass properly so that they do NOT make contact with each other. This to prevent galvanic corrosion.

▪ Valve – Change-over time. When using a 2-way valve in the

space heating circuit, the maximum change-over time of the valve MUST be 60 seconds.

▪ Filter. It is strongly recommended to install an additional filter on

the heating water circuit. Especially to remove metallic particles from foul heating piping, it is advised to use a magnetic or cyclone filter, which can remove small particles. Small particles may damage the unit and will NOT be removed by the standard filter of the heat pump system.

▪ Domestic hot water tank – Capacity. To avoid stagnation of

water, it is important that the storage capacity of the domestic hot water tank meets the daily consumption of domestic hot water.

▪ Domestic hot water tank – After installation. Immediately after

installation, the domestic hot water tank must be flushed with fresh water. This procedure must be repeated at least once a day the first 5 consecutive days after installation.

▪ Domestic hot water tank – Standstills. In cases where during

longer periods of time there is no consumption of hot water, the equipment MUST be flushed with fresh water before usage.

▪ Domestic hot water tank – Disinfection. For the disinfection

function of the domestic hot water tank, see "8.3.2 Domestic hot

water control: advanced" on page 47.

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6 Preparation

▪ Thermostatic mixing valves. In accordance with the applicable

legislation, it may be necessary to install thermostatic mixing valves.

▪ Hygienic measures. The installation must be in compliance with

the applicable legislation and may require additional hygienic installation measures.

▪ Recirculation pump. In accordance with the applicable

legislation, it may be required to connect a recirculation pump in between the hot water end point and the recirculation connection of the domestic hot water tank.

a Recirculation connection b Hot water connection c Shower d Recirculation pump

6.3.2 Formula to calculate the expansion vessel pre-pressure

The pre-pressure (Pg) of the vessel depends on the installation height difference (H):

Pg=0.3+(H/10) (bar)

6.3.3 To check the water volume of the space heating circuit and brine circuit

The indoor unit has 2 expansion vessels of 10 litre, one for the space heating circuit and one for the brine circuit.

To make sure that the unit operates properly:

▪ You must check the minimum and maximum water volume.

▪ You might need to adjust the pre-pressure of the expansion

vessel.

▪ You must check the total space heating water volume unit.

▪ You must check the total brine water volume in the unit.

Minimum water volume

Check that the total water volume per circuit in the installation is minimum 20 litre, the internal water volume of the indoor unit NOT included.

INFORMATION

If a minimum heating load of 1 kW can be guaranteed and setting [9-04] is changed by the installer from 1 to 4°C, the minimum water volume can be lowered to 10 litre.

INFORMATION

In critical processes, or in rooms with a high heat load, extra water might be required.

NOTICE

When circulation in each space heating loop is controlled by remotely controlled valves, it is important that the minimum water volume is guaranteed, even if all of the valves are closed.

a Indoor unit b Heat exchanger c Backup heater d Pump e Shut-off valve

f Collector (field supply)

g By-pass valve (field supply)

FHL1...3 Floor heating loop (field supply)

T1...3 Individual room thermostat (optional)

M1...3 Individual motorised valve to control loop FHL1...3 (field

supply)

FHL1

M2T2M3

FHL2

FHL3

Maximum water volume

Use the following graphs to determine the maximum water volume for the calculated pre-pressure. For brine, this is dependent on the variation of brine temperature in the system. Example: throughout the year, the temperature of the brine can fluctuate between –7°C and 10°C, as in graph 1, or between 0°C and 10°C as in graph 2.

Graph 1: Brine temperature fluctuation is 17°C

2.5

1.5

0.5

0.3

0 400200 600 800 1000

a Pre-pressure (bar) b Maximum water volume (l)

Space heating vessel 40% propylene glycol (brine expansion vessel) 30% ethanol (brine expansion vessel)

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Graph 2: Brine temperature fluctuation is 10°C

2.5

6 Preparation

1.5

0.5

0 500 1000 1500 1750

a Pre-pressure (bar) b Maximum water volume (l)

Space heating vessel 40% propylene glycol (brine expansion vessel) 30% ethanol (brine expansion vessel)

Example: Maximum water volume and expansion vessel prepressure

Installation

height

difference

≤7 m No pre-pressure

>7 m Do the following:

(a)

adjustment is required.

▪ Increase the pre-

▪ Check if the water

(a) This is the height difference (m) between the highest point

of the water circuit and the indoor unit. If the indoor unit is at the highest point of the installation, the installation height is 0 m.

≤280 l >280 l

pressure.

volume does NOT exceed the maximum allowed water volume.

Water volume

Do the following:

▪ Decrease the pre-

pressure.

▪ Check if the water

volume does NOT exceed the maximum allowed water volume.

The expansion vessel of the indoor unit is too small for the installation. In this case, it is recommended to install an extra vessel outside the unit.

6.3.4 Changing the pre-pressure of the expansion vessel

NOTICE

Only a licensed installer may adjust the pre-pressure of the expansion vessel.

When changing the default pre-pressure of the expansion vessel (1 bar) is required, take following guidelines into account:

▪ Only use dry nitrogen to set the expansion vessel pre-pressure.

▪ Inappropriate setting of the expansion vessel pre-pressure will

lead to malfunction of the system.

Changing the pre-pressure of the expansion vessel should be done by releasing or increasing nitrogen pressure through the schräder valve of the expansion vessel.

a Schräder valve

6.3.5 To check the water volume: Examples

Example 1

The indoor unit is installed 5 m below the highest point in the water circuit. The total water volume in the water circuit is 100 l.

No actions or adjustments are required.

Example 2

The indoor unit is installed at the highest point in the water circuit. The total water volume in the water circuit is 300 l.

Actions:

▪ Because the total water volume (300 l) is more than the default

water volume (280 l), the pre-pressure must be decreased.

▪ The required pre-pressure is:

Pg = (0.3+(H/10)) bar = (0.3+(0/10)) bar=0.3 bar.

▪ The corresponding maximum water volume at 0.3 bar is 350 l.

(See the graph in the chapter above).

▪ Because 300 l is lower than 350 l, the expansion vessel is

appropriate for the installation.

6.4 Preparing electrical wiring

6.4.1 About preparing electrical wiring

INFORMATION

Also read the precautions and requirements in the "General safety precautions" chapter.

WARNING

▪ If the power supply has a missing or wrong N-phase,

equipment will break down.

▪ Establish proper earthing. Do NOT earth the unit to a

utility pipe, surge absorber, or telephone earth. Incomplete earthing may cause electrical shock.

▪ Install the required fuses or circuit breakers.

▪ Secure the electrical wiring with cable ties so that the

cables do NOT come in contact with the piping or sharp edges, particularly on the high-pressure side

▪ Do NOT use taped wires, stranded conductor wires,

extension cords, or connections from a star system. They can cause overheating, electrical shock or fire.

▪ Do NOT install a phase advancing capacitor, because

this unit is equipped with an inverter. A phase advancing capacitor will reduce performance and may cause accidents.

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6 Preparation

WARNING

▪ All wiring must be performed by an authorized

electrician and must comply with the applicable legislation.

▪ Make electrical connections to the fixed wiring.

▪ All components procured on the site and all electrical

construction must comply with the applicable legislation.

This equipment allows for connection to such preferential kWh rate power supply delivery systems.

Consult with the electricity company acting as provider at the site where this equipment is to be installed to know whether it is appropriate to connect the equipment in one of the preferential kWh rate power supply delivery systems available, if any.

When the equipment is connected to such preferential kWh rate power supply, the electricity company is allowed to:

▪ interrupt power supply to the equipment for certain periods of time;

WARNING

ALWAYS use multicore cable for power supply cables.

▪ demand that the equipment only consumes a limited amount of

electricity during certain periods of time.

The indoor unit is designed to receive an input signal by which the

6.4.2 About preferential kWh rate power supply

unit switches into forced off mode. At that moment, the unit compressor will not operate.

Electricity companies throughout the world work hard to provide reliable electric service at competitive prices and are often authorized to bill clients at benefit rates. E.g. time-of-use rates,

Whether the power supply is interrupted or not, the wiring to the unit is different.

seasonal rates, Wärmepumpentarif in Germany and Austria, ...

6.4.3 Overview of electrical connections except external actuators

General remark about abbreviations in this and the following chapters: E1 = Refrigerant cycle components (e.g. compressor) and brine piping parts (e.g. brine pump) E2 = All other components except backup heater E3 = Backup heater

Normal power supply Preferential kWh rate power supply

Power supply is NOT interrupted Power supply is interrupted

0 5

8 0

1+2

During preferential kWh rate power supply activation, power supply is NOT interrupted. E1 is turned off by the control.

Remark: The electricity company MUST always allow the power consumption of E2 and E3.

a Normal power supply b Preferential kWh rate power supply 1 Power supply for E1 and E3 2 Power supply for E2 3 Preferential kWh rate power supply (voltage free contact)

NOTICE

The setting brine freezing temperature can be modified and the read out is correct in [A.6.9] Brine freezeup temp ONLY after having accessed menu [A.8] Overview settings.

This setting can ONLY be modified and/or saved and the read out is ONLY correct if the communication between hydro module and compressor module is present. The communication between hydro module and compressor module is NOT guaranteed and/or applicable if:

▪ error "U4" appears on the user interface,

▪ the heat pump module is connected to preferential kWh

rate power supply where power supply is interrupted and preferential kWh rate power supply is activated.

1+2 3

During preferential kWh rate power supply activation, power supply is interrupted immediately or after some time by the electricity company. In this case, the hydro PCB MUST be powered by a separate normal power supply.

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7 Installation

6.4.4 Overview of electrical connections for external and internal actuators

The following illustration shows the required field wiring.

INFORMATION

The following illustration is an example and may NOT match your system layout.

a Indoor unit

Item Description Wires Maximum

Indoor unit power supply

1 Power supply for E1

and E3

2 Power supply for E2 2

4 Preferential kWh rate

power supply (voltage free contact)

5 Normal kWh rate power

supply

User interface

6 User interface 2

Optional equipment

12 Room thermostat 3 or 4 100 mA

13 Outdoor ambient

temperature sensor

14 Indoor ambient

temperature sensor

15 Heat pump convector 4 100 mA

Field supplied components

16 Shut-off valve 2 100 mA

17 Electricity meter 2 (per meter)

18 Domestic hot water

pump

19 Alarm output 2

20 Changeover to external

heat source control

22 Power consumption

digital inputs

(a) Refer to name plate on unit. (b) Minimum cable section 0.75 mm². (c) Cable section 2.5 mm². (d) Cable section 0.75 mm² till 1.25 mm²; maximum length:

50 m. Voltage-free contact shall ensure the minimum applicable load of 15 V DC, 10 mA.

(e) Cable section 0.75 mm² till 1.25 mm²; maximum length:

500 m. Applicable for both single user interface and dual use interface connection.

NOTICE

More technical specifications of the different connections are indicated on the inside of the indoor unit.

3+N + GND

2 6.3 A

2 (per input signal)

running

current

(a)

(c)

(d)

(e)

(b)

7 Installation

7.1 Overview: Installation

This chapter describes what you have to do and know on-site to install the system.

Typical workflow

Installation typically consists of the following stages:

1 Mounting the indoor unit.

2 Connecting the brine piping.

3 Connecting the water piping.

4 Connecting the electrical wiring.

5 Finishing the indoor installation.

7.2 Opening the units

7.2.1 About opening the units

At certain times, you have to open the unit. Example:

▪ When connecting the electrical wiring

▪ When maintaining or servicing the unit

DANGER: RISK OF ELECTROCUTION

Do NOT leave the unit unattended when the service cover is removed.

7.2.2 To open the indoor unit

1 Loosen and remove the screws at the bottom of the unit.

2 Slide the front panel of the unit downwards and remove it.

CAUTION

(b)

The front panel is heavy. Be careful NOT to jam your fingers when opening or closing the unit.

3 Loosen and remove the 4 screws that fix the top panel.

4 Remove the top panel from the unit.

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7 Installation

7.2.3 To open the switch box cover of the indoor unit

7.3.2 To install the indoor unit

1 Bring the unit on the pallet as close as possible to its installation

place.

2 Lift the indoor unit from the pallet and place it on the floor.

3 Slide the indoor unit into position. Make sure that the side

support bolts are present when handling the unit.

210kg

7.3 Mounting the indoor unit

7.3.1 About mounting the indoor unit

INFORMATION

Also read the precautions and requirements in the following chapters:

▪ General safety precautions

▪ Preparation

When

You have to mount the indoor unit before you can connect the brine and water piping.

Typical workflow

Mounting the indoor unit typically consists of the following stages:

1 Installing the indoor unit.

4 Unlink the heat pump module from the outer frame. ONLY

remove the side support bolts!

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7 Installation

NOTICE

Do NOT throw away any bolts. They need to be re-inserted when transport or heavy manipulation is required.

5 Open the front plate of the unit. If needed, the nylon bands for

lifting can be used.

NOTICE

For optimum sound reduction, carefully check if there is no gap between the bottom frame and the floor.

7 Adjust the height of the 2 front leveling feet of the inner frame to

compensate for irregularities.

CAUTION

Check that the heat pump module does NOT touch the outer casing.

NOTICE

Check if the front support bolts remain levelled and are NOT stressed. The support feet from outer (b) and inner frame (c) MUST be adjusted so that those front bolts remain level. Do NOT adjust support foot (a)!

Bottom view:

6 Adjust the height of the 4 leveling feet of the outer frame to

compensate for floor irregularities. The maximum allowed deviation is 1°.

≤1°

Side view:

INFORMATION

To check if the front support bolts are not stressed, loosen them partly and fix them again afterwards.

NOTICE

To avoid structural damage on unit, ONLY move the unit when levelling feet are at their lowest position.

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