DE DIETRICH MIT User Manual

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Interior hydraulic module

MIT iSystem

User Guide

300028952-001-01

Contents

1 Introduction ................................................................................................4

1.1 Symbols used .......................................................4

1.1.1 Symbols used in the manual ...................................4

1.1.2 Symbols used on the equipment .............................4

1.2 Abbreviations ........................................................5

1.3 General ..................................................................5

1.3.1 Manufacturer's liability .............................................5

1.3.2 Installer's liability .....................................................6

1.3.3 User's liability ..........................................................6

1.4 Homologations ......................................................6

1.4.1 Certifications ...........................................................6

2 Safety instructions and recommendations ..............................................7

2.1 Safety instructions ...............................................7

2.2 Recommendations ................................................7

3 Description ..................................................................................................8

3.1 General description ..............................................8

3.2 Control panel .........................................................8

3.2.1 Description of the keys ............................................8

3.2.2 Description of the display ........................................9

3.2.3 Browsing in the menus ..........................................12

4 Operating the appliance ..........................................................................14

4.1 Putting the appliance into operation ................14

4.2 Reading out measured values ...........................15

4.3 Changing the settings ........................................16

4.3.1 Setting the set point temperatures ........................16

4.3.2 Selecting the operating mode ...............................17

4.3.3 Forcing domestic hot water production .................18

4.3.4 Setting the contrast and lighting on the

display ...................................................................18

4.3.5 Setting the time and date ......................................19

4.3.6 Selecting a timer programme ................................19

4.3.7 Customising a timer programme ...........................20

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Contents

4.4 Installation shutdown .........................................22

4.5 Turning on the antifreeze function ....................22

5 Troubleshooting .......................................................................................23

5.1 Anti-hunting ........................................................23

5.2 Messages .............................................................23

5.3 Faults (Code type Lxx or Dxx) ...........................26

6 Technical specifications ..........................................................................28

6.1 Technical specifications ....................................28

6.1.1 Electricity supply ...................................................28

7 Energy savings .........................................................................................29

7.1 Energy savings ...................................................29

7.1.1 Energy-saving advice ............................................29

7.1.2 Room thermostat and settings ..............................29

7.2 Recommendations ..............................................29

8 Warranty ....................................................................................................31

8.1 General ................................................................31

8.2 Warranty terms ...................................................31

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1 2

M002628-A

MIT iSystem 1. Introduction

1 Introduction

1.1 Symbols used

1.1.1. Symbols used in the manual

In these instructions, various danger levels are employed to draw the user's attention to particular information. In so doing, we wish to safeguard the user's safety, obviate hazards and guarantee correct operation of the appliance.

DANGER

Risk of a dangerous situation causing serious physical injury.

WARNING

Risk of a dangerous situation causing slight physical injury.

CAUTION

Risk of material damage.

Signals important information.

¼ Signals a referral to other instructions or other pages in the instructions.

1.1.2. Symbols used on the equipment

Disconnect the mains power prior to any operations.

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Before installing and commissioning the device, read carefully the instruction manuals provided.

Dispose of the used products in an appropriate recovery and recycling structure.

1. Introduction

1.2 Abbreviations

MIT iSystem

4 DHW: Domestic hot water

4 PPS: Polypropylene hardly inflammable

4 PCU: Primary Control Unit - PCB contoller for heat pump operation

4 PSU: Parameter Storage Unit - Parameter storage for PCBs

PCU and SU

4 SCU: Secondary Control Unit - DIEMATIC iSystem control panel

PCB

4 SU: Safety Unit - Safety PCB

4 3WV: 3-way valve

4 EVU: Power supply company

4 MIT: Indoor module fitted with a DIEMATIC iSystem control panel

4 HP or PAC: Heat pump

4 EER: Frigorific efficiency ratio

4 COP: Performance coefficient

1.3 General

4 Supply temperature: Temperature of the water circulating in the

radiators or in the underfloor heating.

4 Ambient temperature: Temperature inside the house or in a room.

4 Room temperature instruction: Temperature programmed in the

control system that must be reached by the heat pump.

1.3.1. Manufacturer's liability

Our products are manufactured in compliance with the requirements of the various applicable European Directives. They are therefore

delivered with [ marking and all relevant documentation.

In the interest of customers, we are continuously endeavouring to make improvements in product quality. All the specifications stated in this document are therefore subject to change without notice.

Our liability as the manufacturer may not be invoked in the following cases:

4 Failure to abide by the instructions on using the appliance.

4 Faulty or insufficient maintenance of the appliance.

4 Failure to abide by the instructions on installing the appliance.

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MIT iSystem

1. Introduction

1.3.2. Installer's liability

The installer is responsible for the installation and inital start up of the appliance. The installer must respect the following instructions:

4 Read and follow the instructions given in the manuals provided

with the appliance.

4 Carry out installation in compliance with the prevailing legislation

and standards.

4 Perform the initial start up and carry out any checks necessary.

4 Explain the installation to the user.

4 If a maintenance is necessary, warn the user of the obligation to

check the appliance and maintain it in good working order.

4 Give all the instruction manuals to the user.

1.3.3. User's liability

To guarantee optimum operation of the appliance, the user must respect the following instructions:

1.4 Homologations

4 Read and follow the instructions given in the manuals provided

with the appliance.

4 Call on qualified professionals to carry out installation and initial

start up.

4 Get your installer to explain your installation to you.

4 To carry out inspections and maintenance required by a qualified

professional.

4 Keep the instruction manuals in good condition close to the

appliance.

This appliance is not intended to be used by persons (including children) whose physcial, sensory or mental capacity is impaired or persons with no experience or knowledge, unless they have the benefit, through the intermediary of a person responsible for their safety, of supervision or prior instructions regarding use of the appliance. Care should be taken to ensure that children do not play with the appliance.

1.4.1. Certifications

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This product complies to the requirements to the european directives and following standards:

4 2006/95/EC Low Voltage Directive. Reference Standards:

EN60335-1 / EN60335-2-40.

4 2004/108/EC Electromagnetic Compatibility Directive. Generic

standards: EN1000-6-3 , EN 61000-6-1.

2. Safety instructions and recommendations

2 Safety instructions and

recommendations

2.1 Safety instructions

DANGER

If smoke is released or in case of refrigerant leak:

1. Switch the appliance off.

2. Open the windows.

3. Evacuate the premises.

4. Contact a qualified professional.

MIT iSystem

2.2 Recommendations

CAUTION

Do not neglect to service the appliance. Contact a qualified professional or take out a maintenance contract for the annual servicing of the appliance.

WARNING

Only qualified professionals are authorised to work on the appliance and the installation.

4 Regularly check that the water pressure in the installation is

between 1,5 and 2 bar.

4 Ensure that the appliance is accessible at all times for

maintenance purposes.

4 Avoid draining the installation.

4 Use only original spare parts.

4 Never remove or cover labels and rating plates affixed to the

appliance. Labels and rating plates must be legible throughout the entire lifetime of the appliance.

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M002616-A

bar

STD

0 2 4 6 8 10 12 14 16 18 22 2420

AUTO

1 2

MIT iSystem 3. Description

3 Description

3.1 General description

The MIT module is fitted with a DIEMATIC iSystem control panel with integrated regulator. It handles the automatic operation of the heat pump as a function of:

4 The outside temperature.

4 The ambient temperature when the remote control (as an option)

is connected.

The DIEMATIC iSystem control panel enables:

4 The independent control of a direct circuit without mixing valve and

a circuit with mixing valve.

4 The independent control system on a DHW preparation circuit.

4 Anti-freeze protection for the installation and the environment if the

home is empty (This period may be programed up to 99 days).

3.2 Control panel

The MIT module also integrates the 30-litre buffer / pressure release tank and additional electrical heating (Only MIT/E).

3.2.1. Description of the keys

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Temperature setting key (heating, DHW, swimming pool)

L000200-A

L000201-A

L000198-A

L000199-A

bar

STD

(

0 2 4 6 8 10 12 14 16 18 22 2420

C002696-A

AUTO

bar

STD

0 2 4 6 8 10 12 14 16 18 22 2420

L000197-A

AUTO

3. Description MIT iSystem

Operating mode selection key

DHW override key

Key to access the parameters reserved for the installer

Keys on which the function varies as and when selections are made

¼ See: "Key functions", page 9

Rotary setting button:

4 Turn the rotary button to scroll through the menus or

modify a value

4 Press the rotary button to access the selected menu

or confirm a value modification

3.2.2. Description of the display

Key functions

> ( '

Access to the various menus

Used to scroll through the menus

Used to scroll through the parameters

The symbol is displayed when help is available

STD

Used to display the curve of the parameter selected

Reset of the time programmes

Selection of comfort mode or selection of the days to be programmed

Selection of reduced mode or deselection of the days to be programmed

ESC

Back to the previous level

Back to the previous level without saving the modifications made

Solar (If connected)

Manual reset

The solar load pump is running

The top part of the tank is reheated to the tank set point

The entire tank is reheated to the tank set point

The entire tank is reheated to the solar tank set point

The tank is not loaded - Presence of the solar control system

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bar

STD

0 2 4 6 8 10 12 14 16 18 22 2420

M002620-A

AUTO

bar

STD

0 2 4 6 8 10 12 14 16 18 22 2420

C002698-B

AUTO

bar

STD

0 2 4 6 8 10 12 14 16 18 22 2420

C002708-A

AUTO

MIT iSystem 3. Description

Operating modes

w + p w

AUTO

Summer mode: Cooling is possible. Domestic hot water continues to be produced.

WINTER mode: Heating and domestic hot water working.

Forced cooling mode.

Cooling mode: Heating according to the time programme.

Operation in automatic mode according to the timer programme.

Comfort mode: The symbol is displayed when a DAY override (comfort) is activated.

4 Flashing symbol: Temporary override

4 Steady symbol: Permanent override

Reduced mode: The symbol is displayed when a NIGHT override (reduced) is activated.

4 Flashing symbol: Temporary override

4 Steady symbol: Permanent override

Holiday mode: The symbol is displayed when a HOLIDAY override (antifreeze) is activated.

4 Flashing symbol: Holiday mode programmed

4 Steady symbol: Holiday mode active

System pressure

bar

Manual mode

Pressure indicator: The symbol is displayed when a water pressure sensor is connected.

4 Flashing symbol: The water pressure is insufficient.

4 Steady symbol: The water pressure is sufficient.

Water pressure level

4 R : 0,9 to 1,1 bar 4 E : 1,2 to 1,5 bar 4 Z : 1,6 to 1,9 bar 4 A : 2,0 to 2,3 bar 4 l : > 2,4 bar

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bar

STD

0 2 4 6 8 10 12 14 16 18 22 2420

C002707-A

AUTO

bar

STD

0 2 4 6 8 10 12 14 16 18 22 2420

M002630-A

AUTO

bar

STD

0 2 4 6 8 10 12 14 16 18 22 2420

M002632-A

AUTO

bar

STD

0 2 4 6 8 10 12 14 16 18 22 2420

M002631-A

AUTO

3. Description MIT iSystem

Domestic Hot Water override

A bar is displayed when a DHW override is activated:

4 Flashing bar: Temporary override

4 Steady bar: Permanent override

Electrical back-up

The symbol 1 or 2 lights up, depending on whether stage 1 or 2 on the electrical back-up is commanded.

Hydraulic additional heating

4 Steady symbol: The burner and the heating pump on

the back-up boiler are commanded.

4 Flashing symbol: The heating pump on the back-up

boiler is commanded.

Status of the compressor

4 Steady symbol: The compressor is running.

4 Flashing symbol: The heat pump is required but the

compressor is off.

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bar

STD

0 2 4 6 8 10 12 14 16 18 22 2420

C002699-B

AUTO

bar

STD

(

0 2 4 6 8 10 12 14 16 18 22 2420

AUTO

#MEASURES

#CHOICE TIME PROG.

#TIME PROGRAM #SETTING #TIME .DAY

C002220-B-04

bar

STD

(

0 2 4 6 8 10 12 14 16 18 22 2420

AUTO

CURRENT PROG.B

CURRENT PROG.C

C002221-C-04

bar

STD

(

0 2 4 6 8 10 12 14 16 18 22 2420

AUTO

CURRENT PROG.C

"Choice of the timeprogram applied C"

C002222-C-04

MIT iSystem 3. Description

Other information

The symbol is displayed when domestic hot water production is running.

Valve indicator: The symbol is displayed when a 3-way valve is connected.

4 x : 3-way valve opens 4 c : 3-way valve closes

The symbol is displayed when the pump is operating.

Name of the circuit for which the parameters are displayed.

3.2.3. Browsing in the menus

1. To select the desired menu, turn the rotary button.

2. To access the menu, press the rotary button. To go back to the previous display, press the key j.

3. To select the desired parameter, turn the rotary button.

4. To modify the parameter, press the rotary button. To go back to the previous display, press the key j.

5. To modify the parameter, turn the rotary button.

6. To confirm, press the rotary button.

To cancel, press key

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bar

STD

(

0 2 4 6 8 10 12 14 16 18 22 2420

AUTO

LUNDI 11:45

C002224-D-04

3. Description MIT iSystem

7. To go back to the main display, press key j2 times.

It is possible to use the ( and ' keys instead of the rotary button.

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C002366-B

Français - Deutsch - English Italiano - Espanol - Nederlands

- Pycck - Polski - Türk -

bar

STD

(

0 2 4 6 8 10 12 14 16 18 22 2420

LANGUE FRANCAIS

C002286-C

MIT iSystem

4 Operating the appliance

4.1 Putting the appliance into operation

1. Switch on the power by throwing the on/off switch on the inside module.

2. The first time the boiler is powered up, the LANGUAGE menu is displayed. Select the desired language by turning the rotary button.

3. To confirm, press the rotary button.

4. The parameter TYPE displays. Select the type of thermodynamic unit by turning the rotary button.

4. Operating the appliance

Indoor module

MIT/E ROE-II

MIT/H ROE-II

Outside module TYPE

ROE-II E FR

ROE-H

ROE+

ROE+TH

ROI+

ROE-H E

ROE+ E FR

ROE+TH E

ROI+ E FR

ROE-II H FR

ROE-H

ROE+

ROE+TH

ROI+

ROE-H H

ROE+ H FR

ROE+TH H

ROI+ H FR

Error during the start-up procedure:

4 No information is shown on the display:

Contact the professional who takes care of maintenance of the appliance.

4 If there is a problem, the error is displayed on the screen.

¼ See chapter: "Messages", page 23.

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STD

(

0 2 4 6 8 10 12 14 16 18 22 2420

AUTO

SUNDAY 11:45

C002219-D-04

4. Operating the appliance MIT iSystem

4.2 Reading out measured values

The various values measured by the appliance are displayed in the #MEASURES menu.

1. To access user level: Press the > key.

2. Select the menu #MEASURES.

4 Turn the rotary button to scroll through the menus or

modify a value.

4 Press the rotary button to access the selected menu

or confirm a value modification.

For a detailed explanation of menu browsing, refer

to the chapter: "Browsing in the menus", page 12.

User level - Menu #MEASURES

Parameter Description Unit ROE-II ROE-H ROE+ ROE+TH ROI+

OUTSIDE TEMP.

ROOMTEMP. A

ROOMTEMP. B

ROOMTEMP. C

TEMP.MIT

PRESSURE

WATER TEMP.

STOR.TANK.TEMP

(1)

SWIMMING P.T.B

SWIMMING P.T.C

OUTLET TEMP. B

OUTLET TEMP. C

SYSTEM TEMP.

T.DHW BOTTOM

TEMP.TANK AUX

DHW A TEMP.

(1)

TEMP.SOL.TANK

SOLAR.COLL.T.

SOLA.ENERGY

HP OUTSIDE T.

TEMP.DEPART HP Heat pump flow temperature °C x x x x x

HP RETURN TEMP

COLD TEMP.

SOURCE TEMP. Refrigerant temperature at the heat pump source end °C

EVAPORATOR T.

FLUID EVAP.T.

FLUID COND.T.

(1) The parameter is only displayed for the options, circuits or sensors actually connected.

Outside temperature °C x x x x x

(1)

Room temperature of circuit A °C x x x x x

(1)

Room temperature of circuit B °C x x x x x

(1)

Room temperature of circuit C °C x x x x x

Inside module flow sensor measurement °C x x x x x

Water pressure in the installation bar x x x x x

(1)

Water temperature in the DHW tank °C x x x x x

Water temperature in the storage tank °C x x x x x

(1)

Water temperature of the swimming pool on circuit B °C x x x x x

(1)

Water temperature of the swimming pool on circuit C °C x x x x x

(1)

Temperature of the flow water in circuit B °C x x x x x

(1)

Temperature of the flow water in circuit C °C x x x x x

(1)

Temperature of the system flow water if multi-

°C x x x x x

generator

(1)

Water temperature in the bottom of the DHW tank °C x x x x x

(1)

Water temperature in the second DHW tank

°C x x x x x

connected to the AUX circuit

Water temperature in the second DHW tank

°C x x x x x

connected to circuit A

(1)

Temperature of the hot water produced by solar power

°C x x x x x

(TS)

(1)

Solar panel temperature (TC) °C x x x x x

(1)

Solar energy accumulated in the tank kWh x x x x x

Outside temperature measured by the heat pump °C x x x x x

Return temperature °C x x

Temperature of the heat pump cold circuit °C

Refrigerant temperature at the fin tube exchanger outlet

Fin tube exchanger refrigerant temperature °C x x

Refrigerant temperature at the heat exchanger °C x x

°C

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x x

MODE

C002266-A

MIT iSystem 4. Operating the appliance

User level - Menu #MEASURES

Parameter Description Unit ROE-II ROE-H ROE+ ROE+TH ROI+

HOT GAS TEMP.

NB IMPULS.COMP

NB IMPULS.COMP.1

RUNTIME HP

NB IMPULS.COMP.2

RUNTIME.COMP.2

IN 0-10V

SEQUENCE

CTRL Software control number (SCU)

(1) The parameter is only displayed for the options, circuits or sensors actually connected.

(1)

Refrigerant temperature at the compressor outlet °C

Compressor outlet temperature °C

Number of heat pump start-ups

Number of start-ups on compressor 1

Number of hours' operation of the heat pump compressor

Number of start-ups on compressor 2

Number of hours' operation of compressor 2 h

Voltage at input 0-10 V V x x x x x

Control system sequence

x x x

h x x x x x

x x x x x

4.3 Changing the settings

4.3.1. Setting the set point temperatures

To set the various heating, DHW and swimming pool temperatures, proceed as follows:

1. Press the C key.

2. To select the desired parameter, turn the rotary button.

3. To modify the parameter, press the rotary button. To go back to the previous display, press the key j.

4. To modify the parameter, turn the rotary button.

5. To confirm, press the rotary button.

To cancel, press key

Menu C

Parameter Adjustment range Description Factory setting

DAY TEMP. A

NIGHT TEMP. A

ROOMTEM.COOL A

DAY TEMP. B

NIGHT TEMP. B

ROOMTEM.COOL B

DAY TEMP. C

NIGHT TEMP. C

ROOMTEM.COOL C

WATER TEMP.

(1) The parameter is only displayed if the corresponding circuit can handle cooling. (2) The parameter is only displayed for the options, circuits or sensors actually connected.

(2)

5 to 30 °C Desired room temperature in comfort periods on circuit A 20 °C

5 to 30 °C Desired room temperature in reduced periods on circuit A 16 °C

(1) (2)

22 to 30 °C Desired room temperature set point in cooling mode 25 °C

5 to 30 °C Desired room temperature in comfort periods on circuit B 20 °C

5 to 30 °C Desired room temperature in reduced periods on circuit B 16 °C

(2) (1)

22 to 30 °C Desired room temperature set point in cooling mode 25 °C

5 to 30 °C Desired room temperature in comfort periods on circuit C 20 °C

5 to 30 °C Desired room temperature in reduced periods on circuit C 16 °C

(2) (1)

22 to 30 °C Desired room temperature set point in cooling mode 25 °C

10 to 65 °C Desired domestic hot water temperature in the DHW circuit 55 °C

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MODE

C002267-A

4. Operating the appliance MIT iSystem

Menu C

Parameter Adjustment range Description Factory setting

TEMP.TANK AUX

DHW A TEMP.

WATER T.NIGHT

(2)

AUX.TANK T.NIGHT

A.TANK T.NIGHT

TEMP.SOL.TANK

SWIMMING P.T.B

SWIMMING P.T.C

(1) The parameter is only displayed if the corresponding circuit can handle cooling. (2) The parameter is only displayed for the options, circuits or sensors actually connected.

(2)

10 to 80 °C

10 to 80 °C Desired domestic hot water temperature in circuit A 55 °C

10 to 80 °C Desired temperature of the domestic hot water in night mode 55 °C

(2)

10 to 80 °C Desired temperature of the domestic hot water in night mode 55 °C

10 to 80 °C Temperature of the hot water produced by solar power (TS) 55 °C

5 to 39 °C Desired temperature for swimming pool B 20 °C

5 to 39 °C Desired temperature for swimming pool C 20 °C

Desired domestic hot water temperature in the auxiliary circuit

55 °C

4.3.2. Selecting the operating mode

To select an operating mode, proceed as follows:

1. Press the MODE key.

2. To select the desired parameter, turn the rotary button.

3. To modify the parameter, press the rotary button. To go back to the previous display, press the key j.

4. To modify the parameter, turn the rotary button.

5. To confirm, press the rotary button.

To cancel, press key

Menu MODE

Parameter Adjustment range Description Factory setting

AUTOMATIQUE

DAY

7/7, xx:xx Comfort mode is forced until the time indicated or all the time (7/7). Present time + 1

The comfort ranges are determined by the timer programme.

hour

NIGHT

HOLIDAYS

SUMMER

7/7, xx:xx Reduced mode is forced until the time indicated or all the time

(7/7).

7/7, 1 to 365 The antifreeze mode is active on all boiler circuits.

Number of days' holiday: xx heating OFF: xx:xx Restarting: xx:xx

The heating is off.

(1)

Present time + 1 hour

Present date + 1 day

Domestic hot water continues to be produced.

COLD

MANUEL

Cooling mode is forced.

The generator operates according to the set point setting. All of the pumps operate. Option of setting the set point by simply turning the rotary button.

FORCE AUTO

YES / NO An operating mode override is activated on the remote control

(2)

(option). To force all circuits to run on AUTOMATIQUE mode, select

(1) The start and end days and the number of days are calculated in relation to each other. (2) The parameter is only displayed if a room sensor is connected.

YES.

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MODE

C002268-A

bar

STD

(

0 2 4 6 8 10 12 14 16 18 22 2420

AUTO

SUNDAY 11:45

C002219-D-04

MIT iSystem 4. Operating the appliance

4.3.3. Forcing domestic hot water production

To force domestic hot water production, proceed as follows:

1. Press the r key.

2. To select the desired parameter, turn the rotary button.

3. To modify the parameter, press the rotary button. To go back to the previous display, press the key j.

4. To modify the parameter, turn the rotary button.

5. To confirm, press the rotary button.

To cancel, press key

Menu r

Parameter Description Factory setting

AUTOMATIQUE

COMFORT

The domestic hot water comfort ranges are determined by the timer programme.

Domestic hot water comfort mode is forced until the time indicated or all the time (7/7). Present time + 1 hour

4.3.4. Setting the contrast and lighting on the

display

1. To access user level: Press the > key.

2. Select the menu #SETTING.

Turn the rotary button to scroll through the menus or modify a value.

4 Press the rotary button to access the selected menu

or confirm a value modification.

For a detailed explanation of menu browsing, refer

to the chapter: "Browsing in the menus", page 12.

3. Set the following parameters:

User level - Menu #SETTING

Parameter Adjustment range Description Factory setting Customer setting

CONTRAST DISP.

BACK LIGHT COMFORT

ECO

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Adjusting the display contrast.

The screen is illuminated continuously in daytime periods.

The screen is illuminated for 2 minutes whenever pressed.

ECO

bar

STD

(

0 2 4 6 8 10 12 14 16 18 22 2420

AUTO

SUNDAY 11:45

C002219-D-04

bar

STD

(

0 2 4 6 8 10 12 14 16 18 22 2420

AUTO

SUNDAY 11:45

C002219-D-04

4. Operating the appliance

4.3.5. Setting the time and date

1. To access user level: Press the > key.

2. Select the menu #TIME .DAY.

4 Turn the rotary button to scroll through the menus or

modify a value.

4 Press the rotary button to access the selected menu

or confirm a value modification.

For a detailed explanation of menu browsing, refer

to the chapter: "Browsing in the menus", page 12.

3. Set the following parameters:

MIT iSystem

User level - Menu #TIME .DAY

(1)

Parameter Adjustment range Description Factory setting Customer setting

HOURS

MINUTE

DAY

DATE

MONTH

YEAR

SUM. TIME: AUTO

0 to 23 Hours setting

0 to 59 Minutes setting

Monday to Sunday Setting the day of the week

1 to 31 Day setting

January to December Month setting

2008 to 2099 Year setting

automatic switch to summer time on the last Sunday

AUTO

in March and back to winter time on the last Sunday in October.

MANU

for countries where the time change is done on other dates or is not in use.

(1) According to the configuration

4.3.6. Selecting a timer programme

1. To access user level: Press the > key.

2. Select the menu #CHOICE TIME PROG..

Turn the rotary button to scroll through the menus or modify a value.

4 Press the rotary button to access the selected menu

or confirm a value modification.

For a detailed explanation of menu browsing, refer

to the chapter: "Browsing in the menus", page 12.

3. To select the desired parameter.

4. Assign the desired timer programme (P1 to P4) to the circuit with the rotary button.

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STD

(

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AUTO

SUNDAY 11:45

C002219-D-04

bar

STD

(

0 2 4 6 8 10 12 14 16 18 22 2420

AUTO

PROG P2 C Mo Tu We Th Fr Sa Su "Display of the timeprogram. To continuepush on the button"

C002228-B-04

MIT iSystem

4. Operating the appliance

User level - Menu #CHOICE TIME PROG.

Parameter Adjustment range Description

CURRENT PROG.A

P1 / P2 / P3 / P4 Comfort programme activated

(Circuit A)

CURRENT PROG.B

P1 / P2 / P3 / P4 Comfort programme activated

(Circuit B)

CURRENT PROG.C

P1 / P2 / P3 / P4 Comfort programme activated

(Circuit C)

4.3.7. Customising a timer programme

1. To access user level: Press the > key.

2. Select the menu #TIME PROGRAM.

4 Turn the rotary button to scroll through the menus or

modify a value.

4 Press the rotary button to access the selected menu

or confirm a value modification.

For a detailed explanation of menu browsing, refer

to the chapter: "Browsing in the menus", page 12.

3. To select the desired parameter.

User level - Menu #TIME PROGRAM

Parameter Time schedule Description

TIME PROG.A PROG P2 A

Timer programme for circuit A

PROG P3 A PROG P4 A

TIME PROG.B PROG P2 B

Timer programme for circuit B

PROG P3 B PROG P4 B

TIME PROG.C PROG P2 C

Timer programme for circuit C

PROG P3 C PROG P4 C

TIME PROG.DHW

TIME PROG.AUX

EVU TIMER PROG.

DHW circuit timer programme

Auxiliary circuit timer programme

EVU power cut off timer program

4. To select a timer programme to be modified.

To select to days for which the timer programme is to be

5. modified: Turn the rotary button to the left until you reach the day desired. To confirm, press the rotary button.

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bar

STD

(

0 2 4 6 8 10 12 14 16 18 22 2420

AUTO

PROG P2 C Mo Tu

We Th Fr Sa Su

"Select the days to program"

C002229-C-04

bar

STD

(

0 2 4 6 8 10 12 14 16 18 22 2420

AUTO

PROG P2 C Mo Tu

We Th Fr Sa Su

Set the time program.

C002230-E-04

06:00

4. Operating the appliance MIT iSystem

6.b : Day selection Press key b / v until the symbol b is displayed. Turn the rotary button to the right to select the day(s) desired.

: Cancelling the day selection

Press key b / v until the symbol v is displayed. Turn the rotary button to the right to cancel selection of the relevant

day(s).

7. When the days desired for the programme have been selected, press the rotary button to confirm.

To define the timer ranges for the comfort mode and reduced

8. mode: Turn the rotary button to the left until 0:00 is displayed. The first segment of the graphic bar for the timer programme flashes.

9.b : Comfort mode selection Press key b / v until the symbol b is displayed. To select a comfort time range, turn the rotary button to the right.

: Reduced mode selection

Press key b / v until the symbol v is displayed. To select a reduced time range, turn the rotary button to the right.

10.When the times for the comfort mode have been selected, press the rotary button to confirm.

User level - Menu #TIME PROGRAM

TIME PROG.A

Day Comfort periods / Filling enabled:

Monday 6:00 to 22:00

Tuesday 6:00 to 22:00

Wednesday 6:00 to 22:00

Thursday 6:00 to 22:00

Friday 6:00 to 22:00

Saturday 6:00 to 22:00

Sunday 6:00 to 22:00

TIME PROG.B

Monday 6:00 to 22:00

Tuesday 6:00 to 22:00

Wednesday 6:00 to 22:00

Thursday 6:00 to 22:00

Friday 6:00 to 22:00

Saturday 6:00 to 22:00

Sunday 6:00 to 22:00

TIME PROG.C

Monday 6:00 to 22:00

Tuesday 6:00 to 22:00

Wednesday 6:00 to 22:00

Thursday 6:00 to 22:00

Friday 6:00 to 22:00

Saturday 6:00 to 22:00

Sunday 6:00 to 22:00

P1 _______________

P2 _______________ P3 _______________ P4 _______________

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MIT iSystem

User level - Menu #TIME PROGRAM

TIME PROG.DHW

TIME PROG.AUX

EVU TIMER PROG.

Day Comfort periods / Filling enabled:

Monday

Tuesday

Wednesday

Thursday

Friday

Saturday

Sunday

Monday

Tuesday

Wednesday

Thursday

Friday

Saturday

Sunday

Monday

Tuesday

Wednesday

Thursday

Friday

Saturday

Sunday

P1 _______________

4. Operating the appliance

P2 _______________ P3 _______________ P4 _______________

4.4 Installation shutdown

If the central heating system is not used for a long period, we recommend switching the appliance off.

To stop the inside module, use the J/K ON/OFF switch and cut the power supply on the house's junction box.

To shut down the outside module, switch off the power supply on the junction box inside the house.

CAUTION

Antifreeze protection is no longer guaranteed automatically if the mains supply is switched off.

4.5 Turning on the antifreeze function

Put the heat pump into HOLIDAYS mode. ¼ See chapter: "Selecting the operating mode", page 17

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5. Troubleshooting MIT iSystem

5 Troubleshooting

5.1 Anti-hunting

When the heat pump is in "anti-short cycle" operating mode, the symbol "?" flashes. This is a normal operating mode. When the restart temperature is reached, operation will be guaranteed.

1. Press the "?" key. The message Operation assured when the restart temperature will be reached is displayed. When the restart temperature is reached, operation will be guaranteed.

This message is not an error message but an item of information.

5.2 Messages

Code

Messages Description Checking / solution

B0 BL.PARAM.CRC

B1 BL.NO CONFIG

B2 BL.MIT/MHR S.

B3 BL.S.DEP.HP

In the case of failure, the control panel displays a message and a corresponding code.

1. Make a note of the code displayed. The code is important for the correct and rapid diagnosis of the type of failure and for any technical assistance that may be needed.

2. Switch off heat pump and start up again. The heat pump starts up again autonomously when the cause of the failure has been lifted.

3. If the code is displayed again, correct the problem by following the instructions in the table below:

Error parameters.

The inside module has not been configured.

The MIT flow sensor is short circuited or on an open circuit.

Heat pump flow sensor error. Bad connection.

4 Switch off the mains supply to the installation

4 Switch back on

The PSU PCB has been changed.

4 Contact the professional who takes care of maintenance

of the appliance.

Bad connection.

4 Contact the professional who takes care of maintenance

of the appliance.

B4 BL.S.EXT.HP

B5 BL.S.RET.HP

4 Contact the professional who takes care of maintenance

of the appliance.

Source sensor error/heat pump outside temperature sensor.

Heat pump return sensor error. Bad connection.

Bad connection.

4 Contact the professional who takes care of maintenance

of the appliance.

4 Contact the professional who takes care of maintenance

of the appliance.

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MIT iSystem 5. Troubleshooting

Code Messages Description Checking / solution

B6 BL.S.ECH.HP

Heat pump exchanger sensor error.

Bad connection.

4 Contact the professional who takes care of maintenance

of the appliance.

B7 BL.S.BAT.HP

Heat pump battery sensor error. Bad connection.

4 Contact the professional who takes care of maintenance

of the appliance.

B8 BL.BL INPUT OPEN

The BL inlet on the PCU PCB terminal block is open. No antifreeze protection.

The contact connected to the BL inlet is open.

4 Contact the professional who takes care of maintenance

of the appliance.

Parameter error.

4 Contact the professional who takes care of maintenance

of the appliance.

Bad connection.

4 Contact the professional who takes care of maintenance

of the appliance.

B9 BL.BL INPUT OPEN

The BL inlet on the PCU PCB terminal block is open. Antifreeze protection.

The contact connected to the BL inlet is open.

4 Contact the professional who takes care of maintenance

of the appliance.

Parameter error.

B10 BL.GROUP.EXT.

B11 BL.COM SCU

B12 BL.WATER MIS.

B13 BL.DHW. S.

B14 BL.OUTSIDE.S

B15 BL.PRES.HIGH

B16 BL.PRES.LOW

B17 BL.PCU ERROR

B18 BL.BAD PSU

4 Contact the professional who takes care of maintenance

of the appliance.

Bad connection.

4 Contact the professional who takes care of maintenance

of the appliance.

Failure outside unit.

4 Contact the professional who takes care of maintenance

of the appliance.

Communication error with the SCU PCB.

The water pressure is lower than 0,5 bar

The DHW tank sensor is disconnected or short circuited

4 Contact the professional who takes care of maintenance

of the appliance.

Not enough water in the circuit.

4 Top up the installation with water.

Bad connection.

4 Contact the professional who takes care of maintenance

of the appliance.

The outside temperature sensor is disconnected or short circuited.

Bad connection.

4 Contact the professional who takes care of maintenance

of the appliance.

High pressure error on the heat pump.

Low-pressure error on the heat pump.

The parameters saved on the PCU PCB are impaired.

4 Contact the professional who takes care of maintenance

of the appliance.

4 Contact the professional who takes care of maintenance

of the appliance.

Parameter error on the PCU PCB.

4 Contact the professional who takes care of maintenance

of the appliance.

The PSU PCB is not recognised Wrong PSU PCB for this heat pump.

B19 BL.NO CONFIG

B21 BL.COM.HPC

B22 BL.COMP.HP

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The inside module has not been configured.

Loss of communication with the heat pump.

Compressor fault.

4 Contact the professional who takes care of maintenance

of the appliance.

The PSU PCB has been changed.

4 Contact the professional who takes care of maintenance

of the appliance.

4 Check the power to the thermodynamic unit.

4 Contact the professional who takes care of maintenance

of the appliance.

4 Contact the professional who takes care of maintenance

of the appliance.

5. Troubleshooting MIT iSystem

Code Messages Description Checking / solution

B23 BL.V4V HP

B24 BL.HW. PUMP

B25 BL.S.OUTLET.COMP

B26 BL.OFF LIMIT1

B27

BL.OFF LIMIT3

B28 FLOW FAIL. 6

B29 FLOW FAIL. 8

B30 BL.COM.HP

B31 BL.EEPROM CPU

B32 BL.CIRC.COLD

B33 BL.HOT GAS

B34 BL.MOT.PROT.

B35 BL.ANTI CC

B37 BL.BIOS

B38 BL.CONFIG

B41 BL.COM.CPT.kWh

B50 BL.S.DEP.CPT.kWh

Heat pump 4 way valve error.

Flow rate error between the heat pump and MIT.

Compressor outlet temperature sensor error.

Under the lower operating limit.

Exchanger frozen.

No communication with the heat pump.

Erro EEPROM on the heat pump PCB.

Fault on the cold circuit.

Hot gas fault.

Primary pump motor error.

Anti-hunting.

Heat pump control system PCB error.

Heat pump control system PCB coding error.

Communication error with the energy meter option PCB.

Energy meter flow sensor error. Bad connection.

4 Check that there is not an inversion between the flow

and return for the heating circuit.

4 Contact the professional who takes care of maintenance

of the appliance.

4 Check the external temperatures are suitable for the

thermodynamic unit.

4 Contact the professional who takes care of maintenance

of the appliance.

4 Contact the professional who takes care of maintenance

of the appliance.

4 Contact the professional who takes care of maintenance

of the appliance.

4 Check the power to the thermodynamic unit.

4 Contact the professional who takes care of maintenance

of the appliance.

4 Switch-off and then restart the thermodynamic unit.

4 Contact the professional who takes care of maintenance

of the appliance.

4 Display menu (#MESSAGE HISTORIC)

4 Contact the professional who takes care of maintenance

of the appliance.

4 Contact the professional who takes care of maintenance

of the appliance.

4 Display in short-cycle period: Check the installation's

volume.

4 Contact the professional who takes care of maintenance

of the appliance.

4 Display outside short-cycle period: Wait 5 minutes. 4 Switch-off and then restart the thermodynamic unit.

4 Contact the professional who takes care of maintenance

of the appliance.

4 Contact the professional who takes care of maintenance

of the appliance.

Bad connection.

4 Contact the professional who takes care of maintenance

of the appliance.

B51 BL.S.RET.CPT.kWh

B52 BL.CPT.kWh.ELEC1

B53 BL.CPT.kWh.ELEC2

B54 BL.CPT.kWh.THERM

4 Contact the professional who takes care of maintenance

of the appliance.

Energy meter return sensor error. Bad connection.

4 Contact the professional who takes care of maintenance

of the appliance.

Electical meter ELEC 1 error. Bad connection.

4 Contact the professional who takes care of maintenance

of the appliance.

Electical meter ELEC 2 error. Bad connection.

4 Contact the professional who takes care of maintenance

of the appliance.

Thermal meter error. Bad connection.

4 Contact the professional who takes care of maintenance

of the appliance.

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bar

STD

(

0 2 4 6 8 10 12 14 16 18 22 2420

AUTO

SUNDAY 11:45

TEMP. : 68°

PCU. COM. FAIL. D27

C002604-B-04

bar

STD

(

0 2 4 6 8 10 12 14 16 18 22 2420

AUTO

SUNDAY 11:45

TEMP. : 68°

PCU COM.FAIL D27

C002302-D-04

MIT iSystem 5. Troubleshooting

5.3 Faults (Code type Lxx or Dxx)

1. Make a note of the code displayed. The code is important for the correct and rapid diagnosis of the type of failure and for any technical assistance that may be needed.

2. Press the t key. If the code is displayed again, switch off the boiler and then switch it back on.

3. Press the ? key. Follow the instructions displayed to solve the problem.

4. Consult the meaning of the codes in the table below:

Code

Faults Description Checking / solution

L1 COMP.FAIL.

L2 FAIL. PAC V4V

L3 FAIL. PAC PUMP

L4 HP OUT LIMIT

L5 FLOW FAIL. 6

L6 FLOW FAIL. 8

L7 HP COM.FAIL

L8 HGAS S.HP FAIL

L9 FAIL. H.P PAC

L10 DEF.B.P. HP

L14 DEF.ANTI.COND.

L15 DEFROST FAIL.

L16 MOT.PROT.FAIL

L17 HGAS S.FAIL

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No compressor rotation.

Heat pump 4 way valve error.

Flow rate error between the heat pump and MIT.

Under the lower operating limit.

Exchanger frozen.

No communication with the heat pump.

Compressor outlet temperature sensor error.

High pressure error on the heat pump.

Low-pressure error on the heat pump.

Condenser anti-freezing error.

Defrosting mode error.

Compressor fault.

Hot gas fault.

4 Contact the professional who takes care of maintenance

of the appliance.

4 Check that there is not an inversion between the flow and

return for the heating circuit.

4 Contact the professional who takes care of maintenance

of the appliance.

4 Contact the professional who takes care of maintenance

of the appliance.

4 Use the backups

4 Contact the professional who takes care of maintenance

of the appliance.

4 Contact the professional who takes care of maintenance

of the appliance.

4 Contact the professional who takes care of maintenance

of the appliance.

4 Contact the professional who takes care of maintenance

of the appliance.

4 Contact the professional who takes care of maintenance

of the appliance.

4 Contact the professional who takes care of maintenance

of the appliance.

4 Contact the professional who takes care of maintenance

of the appliance.

4 Contact the professional who takes care of maintenance

of the appliance.

4 Contact the professional who takes care of maintenance

of the appliance.

4 Contact the professional who takes care of maintenance

of the appliance.

5. Troubleshooting MIT iSystem

Code Faults Description Checking / solution

L18 HP COM.FAIL

L19 FAIL. PAC FLOW S.

Communication error with the heat pump.

Heat pump flow sensor error.

4 Contact the professional who takes care of maintenance

of the appliance.

4 Contact the professional who takes care of maintenance

of the appliance.

L20 FAIL.RET.S.PAC

Heat pump return sensor error.

4 Contact the professional who takes care of maintenance

of the appliance.

L21 AIR IN S.FAIL

Heat pump air inlet sensor error.

4 Contact the professional who takes care of maintenance

of the appliance.

L22 AIR OUT S.FAIL

Heat pump air outlet sensor error.

4 Contact the professional who takes care of maintenance

of the appliance.

L23 S.GAS EXP FAIL

L24 EVA.S.HP FAIL

L25 COND.S.HP FAIL

Compressor suction temperature sensor error.

Evaporator temperature sensor error.

Condenser temperature sensor error.

4 Contact the professional who takes care of maintenance

of the appliance.

4 Contact the professional who takes care of maintenance

of the appliance.

4 Contact the professional who takes care of maintenance

of the appliance.

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MIT iSystem 6. Technical specifications

6 Technical specifications

6.1 Technical specifications

6.1.1. Electricity supply

230 V AC (+ 6% / - 10%) - 50 Hz (Single phase power supply) 400 V AC (+ 6% / - 10%) - 50 Hz (Three-phase power supply)

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7. Energy savings

7 Energy savings

7.1 Energy savings

MIT iSystem

This chapter contains:

4 Energy-saving advice

4 Advice on setting the room thermostat correctly

7.1.1. Energy-saving advice

4 Do not block ventilation outlets.

4 Install reflective panels behind the radiators to prevent heat

losses.

4 Do not cover the radiators. Do not hang curtains in front of the

radiators.

4 Insulate the pipes in rooms that are not heated (cellars and lofts).

4 Close the radiators in rooms not in use.

4 Do not run hot (or cold) water pointlessly.

4 Install a water-saving shower head to save up to 40 % energy.

4 Take showers rather than baths. A bath consumes twice as much

water and energy.

7.2 Recommendations

7.1.2. Room thermostat and settings

4 A modulating thermostat, possibly in combination with

thermostatic valve radiators, saves energy and offers considerable comfort. This combination allows you to set the temperature on each flow. In the room in which the room thermostat is installed, do not fit thermostatic valve radiators.

4 Lower the thermostat to approximately 16°C at night or when you

are absent. This reduces heating costs and energy consumption.

4 Lower the room thermostat when you air the rooms.

4 When setting an hourly programmable thermostat, keep in mind

the days you are absent or on vacation.

The remote control is available in the following versions:

4 Wire

4 Radio

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MIT iSystem 7. Energy savings

The setting of the control panel and/or of the remote control has a considerable influence on energy consumption.

A few tips:

4 In the room in which the room thermostat is installed, it's advised

not to use thermostatic valve radiators. If a thermostatic valve is used the valve must be fully opened.

4 Completely closing and opening thermostatic valve radiators

causes undesirable temperature fluctuations. Open and close thermostatic valves in small steps.

4 Lower the temperature to around 20°C. This reduces heating costs

and energy consumption.

4 Lower the temperature when you air the rooms.

4 When setting a time schedule , bear days when you are absent

and holidays in mind.

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8. Warranty

8 Warranty

8.1 General

8.2 Warranty terms

MIT iSystem

You have just purchased one of our appliances and we thank you for the trust you have placed in our products.

Please note that your appliance will provide good service for a longer period of time if it is regularly checked and maintained.

Your fitter and our customer support network are at your disposal at all times.

The following provisions are not exclusive of the buyer being able benefit from the legal provisions applicable regarding hidden defects in the buyer's country.

Starting from the purchase date shown on the original fitter's invoice, your appliance has a contractual guarantee against any manufacturing defect.

The length of the guarantee is mentioned in the price catalogue. The manufacturer is not liable for any improper use of the appliance or failure to maintain or install the unit correctly (the user shall take care to ensure that the system is installed by a qualified engineer).

In particular, the manufacturer shall not be held responsible for any damage, loss or injury caused by installations which do not comply with the following:

4 applicable local laws and regulations,

4 specific requirements relating to the installation, such as national

and/or local regulations,

4 the manufacturer's instructions, in particular those relating to the

regular maintenance of the unit,

4 the rules of the profession.

The warranty is limited to the exchange or repair of such parts as have been recognised to be faulty by our technical department and does not cover labour, travel and carriage costs.

The warranty shall not apply to the replacement or repair of parts damaged by normal wear and tear, negligence, repairs by unqualified parties, faulty or insufficient monitoring and maintenance, faulty power supply or the use of unsuitable fuel.

Sub-assemblies such as motors, pumps, electric valves etc. are guaranteed only if they have never been dismantled.

The legislation laid down by european directive 99/44/EEC, transposed by legislative decree No. 24 of 2 February 2002 published in O.J. No. 57 of 8 March 2002, continues to apply.

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MIT iSystem 8. Warranty

24/05/2012 - 300028952-001-01

AD001-AG

DUEDI S.r.l.

www.duediclima.it

Distributore Ufficiale Esclusivo

De Dietrich-Thermique Italia

Via Passatore, 12 - 12010 San Defendente di Cervasca CUNEO

+39 0171 857170 +39 0171 687875 info@duediclima.it

DE DIETRICH THERMIQUE Iberia S.L.U.

DE DIETRICH THERMIQUE S.A.S

www.dedietrich-calefaccion.es

Av. Princep d’Astúries 43-45

08012 BARCELONA

+34 932 920 520 +34 932 184 709

129164, Россия, г. Москва

Зубарев переулок, д. 15/1

Бизнес-центр «Чайка Плаза»,

офис 309

+7 (495) 221-31-51

300028952- 001-01

DEDIETRICH THERMIQUE 57,ruedelaGareF-67580MERTZWILLER-BP 30

© Copyright All technical and technological information contained in these technical instructions, as well as any drawings and technical descriptions supplied, remain our property and shall not be multiplied without our prior consent in writing.

24/05/2012

DE DIETRICH MIT User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual