DeDietrich HPI S Series User manual

ADVANCE
S U S T A I N A B L E C O M F O R T ®
MW-1001233-1
MW-
1001233-1
en
User Guide
Reversible air/water "Split Inverter" heat pump
HPI S
MIT-S 4-8/E
MIT-S 11-16/E
MIT-S 22-27/E
MIT-S 4-8/H
MIT-S 11-16/H
MIT-S 22-27/H

Contents
1 Safety instructions and recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.1 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.2 General instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.3 Electrical wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.4 Refrigerant safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.5 Water connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.6 Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.7 Specific instructions for service, maintenance and breakdowns . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
1.8 Liabilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2 Symbols used in the manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3 Technical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.1 Homologations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.1.1 Directives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
3.1.2 EC Declaration of Conformity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.2 Main components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.3 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
3.3.1 Heat pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.3.2 Heat pump weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.3.3 Combination heaters with medium-temperature heat pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.3.4 Circulating pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
4.1 Description of the user interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.1.1 Description of the user interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.1.2 Description of the home screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
4.2 Starting and stopping the heat pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.2.1 Starting the heat pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.2.2 Shutting down the heat pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.3 Switching the central heating on/off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.4 Periods of absence or going on holiday . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.5 Regional and ergonomic parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.6 Personalising the zones . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.6.1 Definition of the term "zone" . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.6.2 Changing the name and symbol of a zone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.7 Personalising the activities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.7.1 Definition of the term "Activity" . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
4.7.2 Changing the name of an activity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.7.3 Changing the temperature of an activity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.8 Room temperature for a zone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.8.1 Selecting the operating mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.8.2 Activating and configuring a timer programme for heating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.8.3 Activating and configuring a timer programme for cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
4.8.4 Changing the room temperature temporarily . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.9 Domestic hot water temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
4.9.1 Selecting the operating mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.9.2 Activating and configuring a timer programme for domestic hot water . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.9.3 Forcing domestic hot water production (override) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.9.4 Modifying the domestic hot water set point temperatures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.10 Monitoring the energy consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
5 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
5.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
5.2 Standard inspection and maintenance operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
5.3 Maintenance message . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
5.4 Displaying the maintenance information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
5.5 Check the hydraulic pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
5.6 Cleaning the casing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
6 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
6.1 Resolving operating errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
6.1.1 Types of error code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
6.1.2 Blocking codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
Contents
2 MIT-S 7684505 - v04 - 10022022

6.1.3 SCB-10 blocking codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
6.1.4 Lockout codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
6.1.5 Warning codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
6.1.6 SCB-10 warning codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
6.2 Fault finding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
7 Decommissioning and disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
7.1 Decommissioning procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
7.2 Disposal and recycling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
8 Energy savings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
9 Product fiche and package fiche . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
9.1 Compatible heating devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
9.2 Product fiche . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
9.3 Product fiche – Temperature controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
9.4 Package fiche - Medium-temperature heat pumps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
10 Appendix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
10.1 Name and symbol of the zones . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
10.2 Name and temperature of the activities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Contents
7684505 - v04 - 10022022 MIT-S 3

1 Safety instructions and recommendations
1.1 Safety
Operation Danger
This appliance can be used by children aged from 8 years and above and persons
with reduced physical, sensory or mental capabilities or lack of experience and
knowledge if they have been given supervision or instruction concerning use of the
appliance in a safe way and understand the hazards involved. Children shall not
play with the appliance. Cleaning and user maintenance shall not be made by chil
dren without supervision.
Electrical Important
Before any work on the appliance, carefully read all documents that accompany
the product. These documents are also available on our website. See the last
page.
Warning
Install the appliance in accordance with national rules on electrical installation.
If a power supply cable comes with the appliance and it turns out to be dam
aged, it must be replaced by the manufacturer, its after-sales service or persons
with similar qualifications in order to avoid danger.
If the appliance is not wired in the factory, carry out the wiring according to the
wiring diagram described in the chapter Electrical Connections. See the Installa
tion and Service Manual.
This appliance must be connected to the protective earthing.
Earthing must comply with the prevailing installation standards.
Earth the appliance before making any electrical connections.
Type and calibre of the protective equipment: refer to the "Recommended cable
cross-sections" chapter. See the Installation and Service Manual.
To connect the appliance to the electricity mains, refer to the "Electrical Connec
tions" chapter. See the Installation and Service Manual.
In order to avoid the danger of an unexpected thermal circuit breaker reset, this appliance must not be
powered through an external switch, such as a timer, or be connected to a circuit which is regularly
switched on and off by the electricity provider.
Hydraulics Caution
Respect the minimum and maximum water pressure and temperature to ensure
the appliance operates correctly. See chapter on Technical Specifications.
Installation Important
Allow the space required to install the appliance correctly, referring to the "Installa
tion" chapter. See the Installation and Service Manual.
1.2 General instructions
Installation The system must satisfy each point in the rules in force in the country that govern works and interven
tions in individual homes, blocks of flats or other buildings.
Only qualified professionals are authorised to work on the appliance and the heating installation. They
must respect prevailing local and national regulations during fitting, installation and maintenance of the
installation.
Commissioning must be performed by a qualified professional.
1 Safety instructions and recommendations
4 MIT-S 7684505 - v04 - 10022022

1.3 Electrical wiring
General Only a qualified installer or qualified service person are allowed to carry out the electrical work of the in
door and outdoor units. Under no circumstances must this work be done by an unqualified individual
since failure to carry out the work properly may result in electric shocks and/or electrical leaks.
The appliance must be installed in accordance with national wiring regulations. Capacity shortages in the
power supply circuit or an incomplete installation may cause an electric shock or fire.
Precautions
Danger
Before any wiring work on the electrical circuit, switch off the power supply, check
that no voltage is present and secure the circuit breaker with a circuit breaker lock
out.
Use wiring that meets the specifications in the Installation Manual and the stipulations in the local regula
tions and laws. Use of wiring which does not meet the specifications may give rise to electric shocks,
electrical leakage, smoking and/or a fire.
Always connect a protective earthing cable (grounding. Earthing must comply with the prevailing installa
tion standards. Earth the appliance before making any electrical connections. Incomplete grounding can
cause a malfunction or electric shock.
To avoid electric shock, make sure that the length of the conductors between the strain relief device and
the terminal blocks is such that the active conductors are put under tension before the earth conductor.
Install a circuit breaker that meets the specifications in the installation manual and the stipulations in the
local regulations and laws.
Install the circuit breaker where it can be easily accessed by the technician.
In order to avoid the danger of an unexpected thermal circuit breaker reset, this appliance must not be
powered through an external switch, such as a timer, or be connected to a circuit which is regularly
switched on and off by the electricity provider.
If a power supply cable comes with the appliance and it turns out to be damaged, it must be replaced by
the manufacturer, its after-sales service or persons with similar qualifications in order to avoid danger.
When connecting the appliance to the electricity mains or carrying out any other wiring work, refer to the
instructions given in the installation manual and the provided wiring diagrams.
Separate the very low voltage cables from the 230/400 V power supply cables.
1.4 Refrigerant safety
General France: Pursuant to Article L. 113-3 of the French Consumer Code, the equipment must be installed by a
certified operator whenever the refrigerant load is in excess of 5 tonnes of CO2 equivalent or when a re
frigerant connection is necessary (the case with split systems, even when fitted with a quick coupling de
vice).
All work on the refrigeration circuit must be done by a qualified professional, according to prevailing co
des of practice and safety in the profession (recovery of the refrigerant, brazing under nitrogen). All braz
ing work must be done by qualified brazers.
Precautions Use only R410A refrigerant to fill the installation.
Use tools and pipe components especially designed for use with R410A refrigerant.
Use copper pipes deoxidised with phosphorus to carry the refrigerant.
Store the refrigerant connection pipes away from dust and humidity (risk of damage to the compressor).
Do not use a load cylinder.
Protect the heat pump components, including the insulation and structural elements. Do not overheat the
pipes as brazed components may cause damage.
Contact between the refrigerant and a flame may result in emissions of toxic gases.
Do not touch the refrigeration connection pipes with your bare hands while the heat pump is running.
Danger of burn or frost injury.
In the event of a refrigerant leakage:
Switch off the appliance.
Open the windows.
Do not use a naked flame, do not smoke, do not operate electrical contacts.
Avoid contact with the refrigerant. Danger of frost injuries.
Locate the probable leak and seal it immediately. Use only original parts to replace a defective refriger
ation component.
Use only dehydrated nitrogen for detecting leaks or for pressurised tests.
Do not allow the refrigerant to escape into the atmosphere.
1 Safety instructions and recommendations
7684505 - v04 - 10022022 MIT-S 5

1.5 Water connections
General To drain the domestic hot water circuit. See chapter Maintenance.
Limit temperature at the draw-off point: the maximum domestic hot water temperature at the draw-off
point is subject to special regulations in the various countries in which the appliance is sold in order to
protect the user. These special regulations be observed when installing the appliance.
Precautions Insulate the pipes to reduce heat losses to a minimum.
Fit drainage valves between the indoor unit and the heating circuit.
If radiators are connected directly to the heating circuit, make sure that there is enough volume of heating
water available in the installation. For example, install a pressure actuated bypass valve and a buffer
tank between the indoor unit and the heating circuit.
Respect the minimum and maximum water pressure and temperature (70°C) to ensure the appliance op
erates correctly. See chapter on Technical Specifications.
The hydraulic installation must be capable of handling a minimum flow rate at all times.
Heating water and domestic water must not come into contact with each other. Domestic water must not
circulate through the exchanger.
1.6 Recommendations
Operation Keep the indoor unit and outdoor unit accessible at all times.
Regularly check the hydraulic pressure in the heating system.
Do not touch radiators for long periods. Depending on the heat pump settings, the temperature of the
radiators may exceed 60 °C.
Do not power off the heat pump. The frost protection mode does not work if the heat pump is switched
off.
If you do not need to heat your home for a long period, turn off the heating function or activate frost pro
tection mode. See the chapter Selecting the operating mode.
Do not drain the installation, except in cases of absolute necessity, for example at disposal. See the
chapter Decommissioning and disposal.
Give preference to the OFF or frost protection mode rather than switching off the system to leave the
following functions running:
Anti blocking of pumps
Frost protection
Never remove or cover the labels and data plates affixed to appliances. Labels and data plates must be
legible throughout the entire lifetime of the appliance.
Immediately replace damaged or illegible instructions and warning stickers.
If you need to switch off the heat pump in the event of a prolonged absence, drain the indoor unit and the
heating system to prevent the system from freezing.
Do not make any modifications to the heat pump without the written consent of the manufacturer.
To benefit from warranty cover, no modifications should be made to the appliance.
1.7 Specific instructions for service, maintenance and breakdowns
Precautions Maintenance work must be carried out by a qualified professional.
Only a qualified professional is authorised to set, correct or replace the safety devices.
For heat pumps with a refrigerant load of more than 5 tonnes of CO2 equivalent, the user must have an
annual leak-tightness test performed on the refrigerant equipment.
Before any work, switch off the power supply to the heat pump, the indoor unit and the hydraulic/electri
cal backup.
Wait for approx. 20-30 seconds for the outdoor unit capacitors to be discharged, and check that the lights
on the outdoor unit PCBs have gone out.
Before working on the refrigeration circuit, switch off the appliance and wait a few minutes. Certain items
of equipment such as the compressor and the pipes can reach temperatures in excess of 100 °C and
high pressures, which may cause serious injuries.
Use only original spare parts.
Locate and correct the cause of power cut before resetting the safety thermostat.
Removal and disposal of the heat pump must be carried out by a qualified professional in accordance
with prevailing local and national regulations.
After maintenance or repair work, check the entire heating system to ensure that there are no leaks.
Remove the casing only to perform maintenance and repair work. Put the casing back in place after
maintenance and repair work.
1 Safety instructions and recommendations
6 MIT-S 7684505 - v04 - 10022022

1.8 Liabilities
Manufacturer's liability Our products are manufactured in compliance with the requirements of the various Directives appli
cable. They are therefore delivered with the marking and any documents necessary. In the inter
ests of the quality of our products, we strive constantly to improve them. We therefore reserve the
right to modify the specifications given in this document.
Our liability as manufacturer may not be invoked in the following cases:
Failure to abide by the instructions on installing the appliance.
Failure to abide by the instructions on using the appliance.
Faulty or insufficient maintenance of the appliance.
Installer's liability The installer is responsible for the installation and initial commissioning of the appliance. The instal
ler must observe the following instructions:
Read and follow the instructions given in the manuals provided with the appliance.
Install the appliance in compliance with prevailing legislation and standards.
Carry out initial commissioning and any checks necessary.
Explain the installation to the user.
If maintenance is necessary, warn the user of the obligation to check the appliance and keep it in
good working order.
Give all the instruction manuals to the user.
User's liability To guarantee optimum operation of the system, the user must follow the instructions below:
Read and follow the instructions given in the manuals provided with the appliance.
Call on a qualified professional to carry out installation and initial commissioning.
Get your installer to explain your installation to you.
Have the required inspections and maintenance carried out by a qualified installer.
Keep the instruction manuals in good condition close to the appliance.
2 Symbols used in the manual
This manual uses various danger levels to draw attention to special
instructions. We do this to improve user safety, to prevent problems and to
guarantee correct operation of the appliance.
Danger
Risk of dangerous situations that may result in serious personal
injury.
Danger of electric shock
Risk of electric shock.
Warning
Risk of dangerous situations that may result in minor personal
injury.
Caution
Risk of material damage.
Important
Please note: important information.
See
Reference to other manuals or pages in this manual.
2 Symbols used in the manual
7684505 - v04 - 10022022 MIT-S 7

3 Technical specifications
3.1 Homologations
3.1.1 Directives
This product complies with the requirements of the following European
Directives and Standards:
Pressure Equipment Directive 2014/68/EU
Low Voltage Directive 2014/35/EU
Generic standard: EN 60335-1
Relevant standards: EN 60335-2-40, EN 60335-2-21
Electromagnetic Compatibility Directive 2014/30/EU
Generic standards: EN 61000-6-3, EN 61000-6-1
Relevant Standard: EN 55014
This product complies with the requirements of European Directive
2009/125/EC on the ecodesign of energy-related products.
In addition to the legal requirements and guidelines, the supplementary
guidelines in this manual must also be followed.
Supplements or subsequent regulations and guidelines that are valid at
the time of installation shall apply to all regulations and guidelines
specified in this manual.
3.1.2 EC Declaration of Conformity
The unit complies with the standard type described in the EC declaration
of conformity. It has been manufactured and put into circulation in
accordance with the requirements of the European Directives.
The original declaration of conformity is available from the manufacturer.
3.2 Main components
1Automatic air vent
2Control panel
3Location of the data plate
3.3 Technical data
3.3.1 Heat pump
The specifications are valid for a new appliance with clean heat
exchangers.
Maximum operating pressure: 0.3 MPa (3 bar)
Fig.1
MW-1001241-1
3
1
2
3 Technical specifications
8 MIT-S 7684505 - v04 - 10022022

Tab.1 Outdoor unit conditions of use
Limit operating temperatures AWHP 4.5
MR
AWHP 6
MR-3
AWHP 8
MR-2
AWHP 11
MR-2
AWHP 11
TR-2
AWHP 16
MR-2
AWHP 16
TR-2
AWHP 22
TR–2
AWHP 27
TR–2
Water in heating mode +18 °C /
+55 °C
+18 °C /
+60 °C
+18 °C /
+60 °C
+18 °C /
+60 °C
+18 °C /
+60 °C
+18 °C /
+60 °C
+18 °C /
+60 °C
Outdoor air in heating mode -15 °C /
+35 °C
-15 °C /
+35 °C
-20 °C /
+35 °C
-20 °C /
+35 °C
-20 °C /
+35 °C
-20 °C /
+35 °C
-20 °C /
+35 °C
Water in cooling mode +7 °C / +25
°C
+7 °C / +25
°C
+7 °C / +25
°C
+7 °C / +25
°C
+7 °C / +25
°C
+7 °C / +25
°C
+7 °C / +25
°C
Outdoor air in cooling mode +10 °C /
+46 °C
+7 °C /
+46 °C
+7 °C /
+46 °C
+7 °C /
+46 °C
+7 °C /
+46 °C
+7 °C /
+46 °C
+7 °C /
+46 °C
Tab.2 Heating mode: outside air temperature +7 °C, water temperature at the outlet +35 °C. Performances in accordance
with EN 14511-2.
Measurement type Unit AWHP
4.5 MR
AWHP 6
MR-3
AWHP 8
MR-2
AWHP
11 MR-2
AWHP
11 TR-2
AWHP
16 MR-2
AWHP
16 TR-2
AWHP
22 TR–2
AWHP
27 TR–2
Heat output kW 4.60 5.87 8.26 10.56 10.56 14.19 14.19 21.70 24.40
Coefficient of perform
ance (COP)
- 5.11 4.18 4.27 4.18 4.18 4.22 4.22 3.96 3.80
Absorbed electrical
power
kWe 0.90 1.41 1.93 2.53 2.53 3.36 3.36 5.48 6.42
Nominal water flow
rate (ΔT = 5 K)
m3/h 0.80 1.04 1.47 1.88 1.88 2.67 2.67 3.80 4.20
Tab.3 Heating mode: outside air temperature +2 °C, water temperature at the outlet +35 °C. Performances in accordance
with EN 14511-2.
Measurement type Unit AWHP
4.5 MR
AWHP 6
MR-3
AWHP 8
MR-2
AWHP
11 MR-2
AWHP
11 TR-2
AWHP
16 MR-2
AWHP
16 TR-2
AWHP
22 TR–2
AWHP
27 TR–2
Heat output kW 3.47 3.74 5.93 10.19 10.19 11.38 11.38 16.11 14.70
Coefficient of perform
ance (COP)
- 3.97 3.30 3.12 3.20 3.20 3.22 3.22 3.13 3.13
Absorbed electrical
power
kWe 0.88 1.11 1.90 3.19 3.19 3.53 3.53 5.14 4.70
Tab.4 Cooling mode: outside air temperature +35 °C, water temperature at the outlet +7 °C. Performances in accordance
with EN 14511-2.
Measurement type Unit AWHP
4.5 MR
AWHP 6
MR-3
AWHP 8
MR-2
AWHP
11 MR-2
AWHP
11 TR-2
AWHP
16 MR-2
AWHP
16 TR-2
AWHP
22 TR–2
AWHP
27 TR–2
Cooling output kW 4.52 4.50 6.65 9.90 9.90 9.74 9.74 11.30 13.20
Energy efficiency ratio
(EER)
- 2.77 2.71 3.00 2.77 2.77 2.89 2.89 2.80 2.82
Absorbed electrical
power
kWe 1.63 1.66 2.22 3.57 3.57 3.37 3.37 4.07 4.69
Tab.5 Cooling mode: outdoor air temperature +35°C, water temperature at the outlet +18°C. Certified performances at full
load in accordance with EN 14511-2.
Measurement type Unit AWHP
4.5 MR
AWHP 6
MR-3
AWHP 8
MR-2
AWHP
11 MR-2
AWHP
11 TR-2
AWHP
16 MR-2
AWHP
16 TR-2
AWHP
22 TR–2
AWHP
27 TR–2
Cooling output kW 6.39 7.41 10.29 15.49 15.49 18.36 18.36 23.23 23.52
Energy efficiency ratio
(EER)
- 2.98 2.90 3.15 3.48 3.48 2.81 2.81 2.88 2.85
Absorbed electrical
power
kWe 2.14 2.56 3.27 4.45 4.45 6.53 6.53 8.07 8.25
3 Technical specifications
7684505 - v04 - 10022022 MIT-S 9

Tab.6 Cooling mode: outdoor air temperature +35°C, water temperature at the outlet +18°C. Stated performances at nominal
load in accordance with EN 14511-2.
Measurement type Unit AWHP
4.5 MR
AWHP 6
MR-3
AWHP 8
MR-2
AWHP
11 MR-2
AWHP
11 TR-2
AWHP
16 MR-2
AWHP
16 TR-2
AWHP
22 TR–2
AWHP
27 TR–2
Cooling output kW 3.80 4.69 7.90 11.16 11.16 14.46 14.46 17.65 22.20
Energy efficiency ratio
(EER)
- 4.28 4.09 3.99 4.68 4.68 4.43 4.43 3.80 3.80
Absorbed electrical
power
kWe 0.89 1.15 2.00 2.35 2.35 3.65 3.65 4.65 5.84
Tab.7 Common specifications
Measurement type Unit AWHP
4.5 MR
AWHP 6
MR-3
AWHP 8
MR-2
AWHP
11 MR-2
AWHP
11 TR-2
AWHP
16 MR-2
AWHP
16 TR-2
AWHP
22 TR–2
AWHP
27 TR–2
Total dynamic head at
nominal flow rate
kPa 62 61.80 49.30 39.30 39.30 21.30 21.30 - -
Nominal air flow rate m3/h 2680 2700 3000 6000 6000 6000 6000 8400 8400
Power voltage of the
outdoor unit
V 230 230 230 230 400 230 400 400 400
Start-up amperage A 5 5 5 5 3 6 3 - -
Maximal amperage A 12 13 17 29.5 13 29.5 13 19 21
Sound power - In
side(1)
dB(A) 43 43 51 51 51 51 51 43 43
Acoustic power - Out
side(2)
dB(A) 58 65 65 69 69 69 69 77 77
R410A refrigerant kg 1.4 1.3 3.2 4.6 4.6 4.6 4.6 7.1 7.7
R410A refrigerant(3) tCO2e 2.923
(2.694)
2.714
(2.501)
6.682
(6.157)
9.605
(8.850)
9.605
(8.850)
9.605
(8.850)
9.605
(8.850)
14.825
(13.660)
16.078
(14.815)
Refrigerant connec
tion (Liquid - Gas)
inch 1/4 - 1/2 1/4 - 1/2 3/8 - 5/8 3/8 - 5/8 3/8 - 5/8 3/8 - 5/8 3/8 - 5/8 3/8 - 1 or
3/8 -
3/4(4)
1/2 - 1 or
1/2 -
3/4(4)
Maximum precharged
length
m 7 10 10 10 10 10 10 30 30
(1) Noise radiated by the envelope - Test run in accordance with the NF EN 12102 standard, temperature conditions: air 7 °C, water 55 °C.
(2) Noise radiated by the envelope - Test run in accordance with the NF EN 12102 standard, temperature conditions: air 7 °C, water 45 °C
for AWHP 4.5 MR only (inner and outer sides).
(3) The quantity of refrigerant in tonnes of CO2 equivalent is calculated using the following formula: quantity (in kg) of refrigerant x GWP/
1000. The Global Warming Potential (GWP) of the R410A is 2088 following the IPCC fourth assessment report (1924 following IPCC
fifth assessment report).
(4) Warning: the refrigerant connection lengths are limited to 20 m with the 3/4" gas pipe.
3.3.2 Heat pump weight
Tab.8 Indoor unit
Indoor unit Unit MIT-S 4-8/E MIT-S 4-8/H MIT-S 11-16/E MIT-S 11-16/H MIT-S 22-27/E MIT-S 22-27/H
Net weight kg 59 53 66 60 66 60
Gross weight kg 70 64 77 71 77 71
Tab.9 Outdoor unit
Outdoor unit Unit AWHP
4.5 MR
AWHP 6
MR-3
AWHP 8
MR-2
AWHP
11 MR-2
AWHP
11 TR-2
AWHP
16 MR-2
AWHP
16 TR-2
AWHP
22 TR–2
AWHP
27 TR–2
Weight kg 54 42 75 118 130 118 130 135 141
3 Technical specifications
10 MIT-S 7684505 - v04 - 10022022

3.3.3 Combination heaters with medium-temperature heat pump
Tab.10 Technical parameters for heat pump combination heaters (parameters declared for medium-temperature application)
Product name Symbol Unit AWHP 4.5
MR
AWHP 6
MR-3
AWHP 8
MR-2
Air-to-water heat pump Yes Yes Yes
Water-to-water heat pump No No No
Brine-to-water heat pump No No No
Low-temperature heat pump No No No
Equipped with a supplementary heater Yes Yes Yes
Heat pump combination heater No No No
Rated heat output under average conditions(1)
Prated kW 3 4 6
Rated heat output under colder conditions Prated kW 5 4 6
Rated heat output under warmer conditions Prated kW 4 5 6
Declared capacity for heating for part load at an indoor
temperature of 20 °C and outdoor temperature Tj
Tj = -7 °C Pdh kW 3.8 3.4 5.6
Tj = +2 °C Pdh kW 4.3 2.2 2.9
Tj = +7 °C Pdh kW 4.5 2.1 6.4
Tj = +12 °C Pdh kW 5.5 2.6 4.3
Tj = bivalent temperature Pdh kW 3.1 3.9 5.6
Tj = operation limit temperature Pdh kW 3.1 3.9 5.6
Bivalent temperature Tbiv °C -10 -10 -10
Degradation coefficient(2)
Cdh - 1.0 1.0 1.0
Seasonal space heating energy efficiency under average
conditions
ƞs % 134 125 129
Seasonal space heating energy efficiency under colder
conditions
ƞs % 109 116 119
Seasonal space heating energy efficiency under warmer
conditions
ƞs % 179 172 169
Declared coefficient of performance or primary energy ratio
for part load at an indoor temperature of 20 °C and outdoor
temperature Tj
Tj = -7 °C COPd - 1.64 1.75 1.95
Tj = +2 °C COPd - 3.46 3.18 3.22
Tj = +7 °C COPd - 4.96 4.56 4.57
Tj = +12 °C COPd - 7.90 6.41 6.55
Tj = bivalent temperature COPd - 1.20 1.56 1.70
Tj = operation limit temperature COPd - 1.20 1.56 1.70
Operation limit temperature for air-to-water heat pumps TOL °C -10 -10 -10
Heating water operating limit temperature WTOL °C 55 60 60
Electrical power consumption
Off mode POFF kW 0.009 0.009 0.009
Thermostat-off mode PTO kW 0.049 0.049 0.049
Stand-by PSB kW 0.012 0.016 0.018
Crankcase heater mode PCK kW 0.000 0.055 0.055
Supplementary heater
Rated heat output Psup kW 0.0 0.0 0.0
Type of energy input Electricity Electricity Electricity
Other specifications
Capacity control Variable Variable Variable
Sound power level, indoors - outdoors LWA dB 43 - 58 43 - 65 51 - 65
3 Technical specifications
7684505 - v04 - 10022022 MIT-S 11

Product name Symbol Unit AWHP 4.5
MR
AWHP 6
MR-3
AWHP 8
MR-2
Annual energy consumption under average conditions QHE kWh 2353 2124 3499
Annual energy consumption under colder conditions QHE kWh 4483 3721 4621
Annual energy consumption under warmer conditions QHE kWh 1249 1492 1904
Rated air flow rate, outdoors for air-to-water heat pumps - m3/h 2680 2700 3300
(1) The rated heat output Prated is equal to the design load for heating Pdesignh , and the rated heat output of a supplementary heater
Psup is equal to the supplementary capacity for heating sup(Tj) .
(2) If Cdh is not determined by measurement, the default degradation coefficient is Cdh = 0.9.
Tab.11 Technical parameters for heat pump combination heaters (parameters declared for medium-temperature application)
Product name Symbol Unit AWHP 11 MR-2
AWHP 11 TR-2
AWHP 16 MR-2
AWHP 16 TR-2
Air-to-water heat pump Yes Yes
Water-to-water heat pump No No
Brine-to-water heat pump No No
Low-temperature heat pump No No
Equipped with a supplementary heater Yes Yes
Heat pump combination heater No No
Rated heat output under average conditions(1)
Prated kW 6 9
Rated heat output under colder conditions Prated kW 4 7
Rated heat output under warmer conditions Prated kW 8 13
Declared capacity for heating for part load at an indoor temperature of
20 °C and outdoor temperature Tj
Tj = -7 °C Pdh kW 6.8 8.6
Tj = +2 °C Pdh kW 5.3 6.5
Tj = +7 °C Pdh kW 9.0 12.9
Tj = +12 °C Pdh kW 7.7 9.9
Tj = bivalent temperature Pdh kW 6.3 8.8
Tj = operation limit temperature Pdh kW 6.3 8.8
Bivalent temperature Tbiv °C -10 -10
Degradation coefficient(2)
Cdh - 1.0 1.0
Seasonal space heating energy efficiency under average conditions ƞs % 125 121
Seasonal space heating energy efficiency under colder conditions ƞs % 113 113
Seasonal space heating energy efficiency under warmer conditions ƞs % 167 161
Declared coefficient of performance or primary energy ratio for part
load at an indoor temperature of 20 °C and outdoor temperature Tj
Tj = -7 °C COPd - 1.82 1.85
Tj = +2 °C COPd - 3.17 3.02
Tj = +7 °C COPd - 4.54 4.34
Tj = +12 °C COPd - 6.19 5.75
Tj = bivalent temperature COPd - 1.20 1.35
Tj = operation limit temperature COPd - 1.20 1.35
Operation limit temperature for air-to-water heat pumps TOL °C -10 -10
Heating water operating limit temperature WTOL °C 60 60
Electrical power consumption
Off mode POFF kW 0.009 0.009
Thermostat-off mode PTO kW 0.049 0.035
Stand-by PSB kW 0.021 0.021
Crankcase heater mode PCK kW 0.055 0.055
Supplementary heater
Rated heat output Psup kW 0.0 0.0
3 Technical specifications
12 MIT-S 7684505 - v04 - 10022022

Product name Symbol Unit AWHP 11 MR-2
AWHP 11 TR-2
AWHP 16 MR-2
AWHP 16 TR-2
Type of energy input Electricity Electricity
Other specifications
Capacity control Variable Variable
Sound power level, indoors - outdoors LWA dB 51 - 65 51 - 69
Annual energy consumption under average conditions QHE kWh 3999 5861
Annual energy consumption under colder conditions QHE kWh 3804 5684
Annual energy consumption under warmer conditions QHE kWh 2580 4120
Rated air flow rate, outdoors for air-to-water heat pumps - m3/h 6000 6000
(1) The rated heat output Prated is equal to the design load for heating Pdesignh , and the rated heat output of a supplementary heater
Psup is equal to the supplementary capacity for heating sup(Tj) .
(2) If Cdh is not determined by measurement, the default degradation coefficient is Cdh = 0.9.
Tab.12 Technical parameters for heat pump combination heaters (parameters declared for medium-temperature application)
Product name Symbol Unit AWHP 22 TR–2 AWHP 27 TR–2
Air-to-water heat pump Yes Yes
Water-to-water heat pump No No
Brine-to-water heat pump No No
Low-temperature heat pump No No
Equipped with a supplementary heater Yes Yes
Heat pump combination heater No No
Rated heat output under average conditions(1)
Prated kW 11 14
Rated heat output under colder conditions Prated kW 12 14
Rated heat output under warmer conditions Prated kW 18 20
Declared capacity for heating for part load at an indoor temperature of
20 °C and outdoor temperature Tj
Tj = -7 °C Pdh kW 10.3 12.4
Tj = +2 °C Pdh kW 10.0 8.9
Tj = +7 °C Pdh kW 5.8 11.8
Tj = +12 °C Pdh kW 6.9 18.1
Tj = bivalent temperature Pdh kW 10.9 12.4
Tj = operation limit temperature Pdh kW 10.9 14.1
Bivalent temperature Tbiv °C -10 -7
Degradation coefficient(2)
Cdh - 1.0 1.0
Seasonal space heating energy efficiency under average conditions ƞs % 114 112
Seasonal space heating energy efficiency under colder conditions ƞs % 111 103
Seasonal space heating energy efficiency under warmer conditions ƞs % 143 141
Declared coefficient of performance or primary energy ratio for part
load at an indoor temperature of 20 °C and outdoor temperature Tj
Tj = -7 °C COPd - 1.95 1.67
Tj = +2 °C COPd - 2.80 2.86
Tj = +7 °C COPd - 3.76 4.12
Tj = +12 °C COPd - 4.85 5.06
Tj = bivalent temperature COPd - 1.64 1.67
Tj = operation limit temperature COPd - 2.80 2.86
Operation limit temperature for air-to-water heat pumps TOL °C -10 -10
Heating water operating limit temperature WTOL °C 60 60
Electrical power consumption
Off mode POFF kW 0.010 0.014
Thermostat-off mode PTO kW 0.049 0.023
3 Technical specifications
7684505 - v04 - 10022022 MIT-S 13

Product name Symbol Unit AWHP 22 TR–2 AWHP 27 TR–2
Stand-by PSB kW 0.021 0.021
Crankcase heater mode PCK kW 0.055 0.055
Supplementary heater
Rated heat output Psup kW 0.0 0.0
Type of energy input Electricity Electricity
Other specifications
Capacity control Variable Variable
Sound power level, indoors - outdoors LWA dB 43 - 70 43 - 77
Annual energy consumption under average conditions QHE kWh 7681 9993
Annual energy consumption under colder conditions QHE kWh 10578 13164
Annual energy consumption under warmer conditions QHE kWh 10025 11541
Rated air flow rate, outdoors for air-to-water heat pumps - m3/h 6000 6000
(1) The rated heat output Prated is equal to the design load for heating Pdesignh , and the rated heat output of a supplementary heater
Psup is equal to the supplementary capacity for heating sup(Tj) .
(2) If Cdh is not determined by measurement, the default degradation coefficient is Cdh = 0.9.
See
The back cover for contact details.
3.3.4 Circulating pump
Important
The benchmark for the most efficient circulating pumps is EEI ≤
0.20.
4 Operation
4.1 Description of the user interface
4.1.1 Description of the user interface
1Rotary knob to select a menu or setting
2Validation button
3Back button to return to the previous level or menu
4Main menu button
5Display screen
6LED for status indication:
continuous green = normal operation
flashing green = warning
red fixed = blockage
flashing red = lockout
4.1.2 Description of the home screen
The home screen is displayed automatically after the appliance is started
up.
The screen automatically goes into standby if no button is pressed for five
minutes.
Press one of the buttons on the user interface to exit the standby screen
and display the home screen.
Fig.2
MW-5000756-1
3
4
1
2
56
4 Operation
14 MIT-S 7684505 - v04 - 10022022

Tab.13 Icons on the home screen and information
Icon Information Description of the icon
OK
I
Error status Information on operation of the appliance
Maintenance status Maintenance message
Installer access Installer Level
Holiday programme Holiday mode in all circuits simultaneously
23.5
Air source heat pump Heat pump flow temperature display
Water pressure Current water pressure display
21.7
,
23.5
,
24.5
,
19.8
,
23.5
,
23.5
,
27.5
,
23.5
CIRCA/CIRCB Symbol representing the circuit used
Circuit temperature display
DHW tank Temperature display for the domestic hot water
Outdoor temperature Outdoor temperature display
4.2 Starting and stopping the heat pump
4.2.1 Starting the heat pump
1. Switch on the outdoor unit and the indoor unit.
The heat pump will begin an automatic vent cycle (which lasts
approx. three minutes), run each time the power is switched on.
2. Check the hydraulic pressure in the installation indicated on the user
interface.
Important
Recommended hydraulic pressure between 1.5 and 2.0 bar.
4.2.2 Shutting down the heat pump
The heat pump must be shut down in certain situations, for example
during any intervention on the equipment. In other situations, such as an
extended absence period, we recommend that the Holiday operating
mode is used in order to benefit from the heat pump anti-blocking function
and to protect the installation from frost.
To shut down the heat pump:
1. Switch off the power to the outdoor unit.
2. Switch off the power to the indoor unit.
4.3 Switching the central heating on/off
Your appliance will automatically deactivate the heating function and
switch to cooling mode when the temperature exceeds 22 °C (factory
setting). However, you can manually switch off the heating function for all
circuits to save energy during the summer period, for example.
4 Operation
7684505 - v04 - 10022022 MIT-S 15

Important
If the heating function is shut off, then the cooling will also be shut
off.
1. Select the
23.5
Air Src Heat pump icon.
2. Select CH function on.
3. Select the desired value:
Off to stop the heating function.
On to switch the heating function on again.
4.4 Periods of absence or going on holiday
If you will be absent for several weeks, you can reduce the room
temperature and domestic hot water temperature in order to save energy.
To do this, activate the Holiday operating mode for all zones, including for
domestic hot water.
1. Select the Holiday Mode icon.
2. Set the following parameters:
Tab.14
Parameter Description
Start date holiday Set the date and time for the start of the absence period.
End date holiday Set the date and time for the end of the absence period.
Wished room temperature during holiday Set the desired room temperature for the absence period
Reset Restart or cancel the holiday programme
4.5 Regional and ergonomic parameters
You can personalise your appliance by modifying the parameters linked to
your geographic location and the ergonomics of the user interface.
1. Press the button.
2. Select System Settings.
3. Carry out one of the following operations:
Tab.15
Menu Description
Set Date and Time Setting the date and time
Select Country and Language Select the country and language
Daylight Saving Time Setting the automatic change to daylight saving time. These changes will be carried out on the
last Sunday in March and October
Installer Details Display the installer details
Cost calculation Enter the tariffs for the energy used
Set Heating Activity Names Modify the name of activities used to program heating periods
Set Cooling Activity Names Modify the name of activities used to program cooling periods
Set Screen Brightness Setting the screen brightness
Set click sound Switch the sound of the rotary knob on or off
Firmware Update Function not available
License Information Display the creation licenses for the internal software
On
4 Operation
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4.6 Personalising the zones
4.6.1 Definition of the term "zone"
Zone: term given to the different hydraulic circuits (CIRCA, CIRCB). It
indicates several rooms served by the same circuit.
Tab.16 Example:
Key Zone Factory-set name
1
Zone 1 CIRCA
2
Zone 2 CIRCB
4.6.2 Changing the name and symbol of a zone
The name and symbol for a zone are factory-set as shown in the
appendix. If you desire, you can personalise the name and symbol of the
zones in your installation.
1. Select the icon of the zone to be modified, , for example.
2. Select Zone configuration > Zone friendly Name.
3. Change the name of the zone (20 characters maximum).
4. Select Icon display zone
5. Select the symbol to be associated with the zone.
6. Enter the chosen name and symbol in the table provided at the back
of the manual.
4.7 Personalising the activities
4.7.1 Definition of the term "Activity"
Activity: this term is used when programming time ranges. It refers to the
client's desired comfort level for different activities during the course of the
day. One set point temperature is associated to each activity. The last
activity of the day remains valid until the first activity of the following day.
Tab.17 Example:
Start
of the activity Activity Set point temperature
6:30 Morning
1
20 °C
9:00 Away
2
19 °C
17:00 Home
3
20 °C
20:00 Evening
4
22 °C
23:00 Sleep
5
16 °C
4.7.2 Changing the name of an activity
The name of the different activities is factory-set: Sleep, Home, Away,
Morning, Evening and Custom. If you wish, you can personalise the name
of the activities for all of the zones in your installation.
1. Press the button.
2. Select System Settings.
Fig.3
1
MW-1001145-2
2
Fig.4
MW-1001144-2
°C
16
06:30 09:00 17:00 20:00 23:00
19
20
22
5
1
2
3
4
5
4 Operation
7684505 - v04 - 10022022 MIT-S 17

3. Select Set Heating Activity Names or Set Cooling Activity Names.
4. Select the activity you want to change.
5. Change the name of the activity (10 characters max.).
4.7.3 Changing the temperature of an activity
The temperatures for the different activities are factory-set as shown in the
appendix. If you desire, you can personalise the temperatures for these
activities for all of the zones in your installation. These activities are used
in the timer programmes.
1. Select the icon for the zone to be programmed, , for example.
2. Select Set Heating Activity Temperatures, either for heating or for
cooling.
Information on the selected menu is given in the lower part of the
screen.
3. Select the activity you want to change.
4. Modify the temperature for the activity.
5. Enter the chosen temperature in the table provided at the back of the
manual.
4.8 Room temperature for a zone
4.8.1 Selecting the operating mode
To set the room temperature for the different living zones, you can choose
between five operating modes. We recommend the Scheduling operating
mode which enables the room temperature to be modulated according to
your needs and to optimise your energy consumption.
1. Select the icon for the affected zone, , for example.
2. Select the desired operating mode:
Tab.18
Mode Description
Scheduling The room temperature is modulated according to the timer programme chosen.
Recommended mode.
Manual The room temperature is constant.
Short temperature change The room temperature is forced for a defined period.
Holiday The room temperature is reduced during an absence period to save energy.
Antifrost The installation and equipment are protected against frost during the winter peri
od.
4.8.2 Activating and configuring a timer programme for heating
A timer programme can be used to vary the room temperature in a living
zone depending on activities during the day. This can be programmed for
each day of the week.
1. Select the icon for the zone to be programmed, , for example.
Information on the current operating mode is given in the upper part
of the screen.
2. To activate the timer programming or to change the timer programme,
select Scheduling.
3. Select the timer programme to be activated.
Information on the active timer programme is given in the upper part
of the screen.
Off
Off
4 Operation
18 MIT-S 7684505 - v04 - 10022022

4. To modify the timer programme, select Zone configuration > Heating
Schedule.
5. Select the programme to be modified.
The programmed activities for Monday are displayed.
The last activity of the day remains active until the first activity of the
following day.
6. Select the day to be modified.
7. Carry out the following actions according to your needs:
Modify the timings for programmed activities.
Add a new time range.
Delete a programmed activity (choose the activity "Delete").
Copy programmed daily activities to other days.
Modify temperatures linked to an activity.
4.8.3 Activating and configuring a timer programme for cooling
You can modify the timer programme linked to the Cooling mode. In the
Scheduling operating mode, the Cooling timer programme is activated
automatically when the average outdoor temperature over a 24-hour
period has been greater than 22 °C. If you would prefer that this mode is
triggered at a different temperature, ask your installer to modify this
parameter in your installation.
1. Select the icon for the zone to be programmed, , for example.
Information on the current operating mode is given in the upper part
of the screen.
2. To modify the timer programme for the Cooling mode, select Zone
configuration > Cooling Schedule.
The programmed activities for Monday are displayed.
The last activity of the day remains active until the first activity of the
following day.
3. Select the day to be modified.
4. Carry out the following actions according to your needs:
Modify the timings for programmed activities.
Add a new activity.
Delete a programmed activity (choose the activity "Delete").
Copy programmed daily activities to other days.
Modify temperatures linked to an activity.
4.8.4 Changing the room temperature temporarily
Regardless of the operating mode selected for a zone, it is possible to
modify the room temperature for a defined period. Once this time has
elapsed, the selected operating mode will restart.
1. Select the icon of the zone to be modified, , for example.
2. Select Short temperature change.
3. Define the duration in Hour and in Minute.
4. Set the temporary room temperature setpoint for the circuit selected.
4.9 Domestic hot water temperature
4.9.1 Selecting the operating mode
For the production of domestic hot water, you can choose between five
operating modes. We recommend the Scheduling mode which enables
domestic hot water production periods to be programmed according to
your needs and to optimise your energy consumption.
1. Select the DHW tank icon.
Fig.5
MW-5000770-04
Heating Schedule
Zone setup: ...Zo..
14 : 23
Monday
6:00 Comfort 20.0°C
Edit schedule entry
6:00 Comfort 20.0°C
22.00 Reduce 16.00°C
Add time and Activity
Copy to other day
Set activity temperatures
Off
Fig.6
MW-1001267-04
Cooling Schedule
Zone setup: ...Zo..
14 : 23
Monday
6:00 Comfort 20.0°C
Edit schedule entry
6:00 Comfort 20.0°C
22.00 Reduce 16.00°C
Add time and Activity
Copy to other day
Set activity temperatures
Off
Off
4 Operation
7684505 - v04 - 10022022 MIT-S 19

2. Select the desired operating mode:
Tab.19
Mode Description
Scheduling The domestic hot water is produced according to the timer programme
chosen
Manual The domestic hot water temperature remains at the comfort temperature
permanently
Hot water boost The production of domestic hot water is forced at the comfort temperature
for a defined duration
Holiday The domestic hot water temperature is reduced during an absence period
to save energy
Antifrost The equipment and the system are protected when the heat pump is in
frost protection mode.
4.9.2 Activating and configuring a timer programme for domestic hot water
A timer programme can be used to vary the domestic hot water
temperature depending on activities during the day. This can be
programmed for each day of the week.
1. Select the DHW tank icon.
Information on the current operating mode is given in the upper part
of the screen.
2. To activate the timer programming or to change the timer programme,
select Scheduling.
3. Select the timer programme to be activated.
Information on the active timer programme is given in the upper part
of the screen.
4. To modify the timer programme, select Zone configuration > DHW
Schedule.
5. Select the programme to be modified.
The programmed activities for Monday are displayed.
The last activity of the day remains active until the first activity of the
following day.
6. Select the day to be modified.
7. Carry out the following actions according to your needs:
Modify the timings for programmed activities.
Add a new activity.
Delete a programmed activity (choose the activity "Delete").
Copy programmed daily activities to other days.
Modify temperatures linked to an activity.
4.9.3 Forcing domestic hot water production (override)
Regardless of the selected operating mode, you can force domestic hot
water production to the comfort temperature (DHW comfort setpoint
parameter) for a defined duration.
1. Select the DHW tank icon.
2. Select Hot water boost.
3. Define the duration in Hour and in Minute.
4.9.4 Modifying the domestic hot water set point temperatures
The production of domestic hot water operates with two set point
temperature parameters:
DHW comfort setpoint: used in the Scheduling, Manual and Hot water
boostmodes
DHW reduced setpoint: used in the Scheduling, Holiday and
Antifrostmodes
Off
Fig.7
MW-2000750-03
DHW1: DHW Schedule
Zone setup...Zo...
14 : 23
Monday
6:00 Comfort 55.0°C
Edit schedule entry
6:00 Comfort 55.0°C
Add time and Activity
Copy to other day
Set activity temperatures
Off
4 Operation
20 MIT-S 7684505 - v04 - 10022022