How it Works
DE DIETRICH
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MIT-II-H
User Manual
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Table of contents
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DE DIETRICH MIT-II-E, MIT-II-H, MIT-EP, MIT-HP User Manual

Control panel
MIT-II/E - MIT-II/H MIT/EP - MIT/HP QUADROPAC DUP 500
EN
User Guide
300015090-001-L
Contents
1 Used symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
2 Important recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
3 Control panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
3.1 Electromechanical components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
3.2 Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
3.3 Keys accessible when the flap is closed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
3.4 Keys accessible when the flap is open. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
3.5 Operating mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
4 Heating and domestic hot water temperature setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
4.1 Heating temperature setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
4.2 DHW set temperature. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
5 Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
5.1 Selecting a programme . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
5.2 Hot water programme. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
5.3 Auxiliary programme. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
5.4 Customising the programmes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
5.5 Resetting the programmes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
6 "User" settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
6.1 Table of "User" setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
6.2 Customising the programmes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
6.3 Miscellaneous settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
6.4 Setting the time and the date - Summer time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
7 Message . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
8 Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
8.1 Maintenance contract . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
8.2 Fault finding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
9 Diagnosing breakdowns . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
2
Congratulations on choosing a De Dietrich product, a product of quality. We strongly recommend that you read the following instructions in order to guarantee the optimal operation of your appliance. We are sure that you will not be disappointed and that it will satisfy all of your expectations.

1 Used symbols

Caution danger
Risk of injury and damage to equipment. Attention must be paid to the warnings on safety of persons and equipment
Specific information
Information must be kept in mind to maintain comfort
Refer to another manual or other pages in this instruction
Z
manual
DHW: Domestic hot water
MIT: Indoor module fitted with a Diematic 3 control panel
HP or PAC: Heat pump.

2 Important recommendations

For a proper operating of the boiler, follow carefully the
instructions.
Any intervention on the appliance and heating equipment
must be carried out by a qualified technician.
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 fitter).
14/04/2010 - 300015090-001-L MIT-II - MIT/P - QUADROPAC DUP 500
3

3 Control panel

3.1 Electromechanical components

2*
0 2 4 6 8 1012141618202224
SUNDAY
bar
1. Main ON/OFF switch
To take advantage of the pump cleaning function, do not switch off the appliance in summer. Use the Summer mode for the desired heating shutdown period.
See: Operating mode.
Z
If a remote control CDI 2 is connected, it will have no display when the general switch is in the off position
2. Pressure gauge
* Depending on the model of the appliance, the pressure gauge is manual (dial display) or automatic (pictogram display).
3. Alarm indicator
.
A
C000142_00
-04
3
4
2*1
2
13
0
4
bar
- Red indicator: The PAC is safe
- Green indicator: normal operation
- Red control light is flashing: Sensor fault
4. Reset button
4

3.2 Display

2
0 2 4 6 8 1012141618202224
1
1 Text and numerical display 2 Graphic bar displaying the programme on circuit A or B (in
zone 9) 3 Light area: Nighttime period 4 Dark area: Daytime period 5 Flashing cursor showing the current time 6 Number display (current time, adjusted values, parameters,
etc.) 7 Active programme display, P1, P2, P3, P4
or
E: Summer mode activated - heating OFF 8 Flashing arrows when the
adjust the displayed parameter
9 Circuit operation symbols
Opening the 3-way valve
>
=
Closing the 3-way valve
Displayed circuit pump on
:
A, B Name of the circuit displayed
10 Symbol displayed above the active operating mode
or  keys should be used to
SUNDAY
bar
3 4 5 6 7
A
BC
91011
11 Symbols indicating that the following inputs/outputs are
D X
Y
 #
D E X
Y
8
active ROE-II - ROE+ - SOLO - NAPO - ROI+ - ROE-H
PAC is operating in Hot or Cold mode
PAC is operating in Hot mode with additional electrical heating at stage 1
PAC is operating in Hot mode with additional electrical heating at stage 2
Additional electrical heating operating, stage 1. PAC off
Additional electrical heating operating, stage 2. PAC off
DHW production pending with the thermodynamic unit
Forced "summer" condition
ROE+ TH
PAC is operating in Hot mode with 1 compressor
PAC is operating in Hot mode with 2 compressor
PAC is operating in Hot mode with 2 compressors and 1 back­up provision
PAC is operating in Hot mode with 2 compressors and 2 back­up provision
Additional electrical heating operating, stage 1. PAC off
Additional electrical heating operating, stage 2. PAC off
DHW production pending with the thermodynamic unit
Forced "summer" condition
#
Water pressure display, user interface
Insufficient pressure: add water (0 - 0.5 bar)
Addition of water recommended (0.5 - 1 bar)
U
Pressure correct (1 - 2 bar)
T
Too much pressure (> 2 bar)
14/04/2010 - 300015090-001-L MIT-II - MIT/P - QUADROPAC DUP 500
5

3.3 Keys accessible when the flap is closed

024681012141618202224
SUNDAY
A
Temperature setting keys
2% 2$ 2
/
Daytime temperature
Nighttime temperature
Domestic hot water temperature
Is used to adjust the selected temperature
When one of these keys is pressed, the active time programme corresponding to the circuit is displayed in the graphic bar

3.4 Keys accessible when the flap is open

024681012141618202224
SUNDAY
C000142_02
Operating mode selection keys
AUTO
%
$ . 
A
A
-04
Heating according to the time programme
Forced operation at Daytime temperature
Forced operation at Nighttime temperature
Antifreeze mode
Tank load enabled mode
STANDARD
#
STANDARD
K
Key for access to setting and measurements
J I H
Manual "Summer" shutdown key
"Standard" programme key
Reset of all time programmes.
Fitter settings access key
Page scrolling
Line scrolling
Return to the previous line
6
C000142_03
Programming keys
%O
$P
S
A.B
PROG
-04
Input (per 1/2 hour) of the Daytime Temperature period
Input (per 1/2 hour) of the Nighttime Temperature period
Return key
Circuit display selection key
Active heating programme selection key (P1, P2, P3 or P4)

3.5 Operating mode

0 2 4 6 8 1012141618202224
SUNDAY
A
Select the operating modes using the AUTO -%-$-. keys. These keys simultaneously control all circuits connected.
To modify the operating mode (AUTO, Daytime for only one of the heating circuits, use the remote control corresponding to this circuit.
An override applied to the remote control takes priority over the override selected on the central regulator.
` AUTO key = Automatic mode
Heating according to the time programme.
See: Programming.
Z
` Key
The heating operates according to the Daytime temperature, independently of the timed programmes.
` Key
The heating operates according to the Nighttime temperature, independently of the timed programmes.
` Key
Domestic hot water production is enabled, independently of the time programme.
` Key
The heating is off but the installation is monitored and protected against frost.
The antifreeze mode protects:
- The installation if the outside temperature is lower than 3°C
- The room temperature if a remote control is connected and the
= Daytime mode
%
= Night mode
$
= Tank load enabled mode
= Antifreeze mode
.
(factory setting).
room temperature is lower than 6 °C (factory setting).
or Nighttime $)
%
C000142_02
` Key
024681012141618202224
Key function is activated, to switch to Cooling mode.
Z
This function is independent of the "automatic heating shutdown" function in summer when the outside temperature exceeds the outside temperature for "heating shutdown".
#
SUNDAY
is used to cut off the heating and, if the corresponding
#
See menu #HEAT PUMP, parameter REFR.:
When the heating is off during the "summer" mode, the pumps are started up once a week for one minute in order to prevent fouling.
The MIT interior hydraulic module operates in COOLING mode only:
- During the
-
and
if the outside temperature is higher than the instruction
WIN
+
Do not use or modify this programme when operating with the QUADROPAC domestic hot water tank.
-04
(Located under the flap) = SUMMER mode / Cooling
A
A
STANDARD
C000142_03
DAY
period on timed programmes A and B,
SUM/WIN BAND
(Factory setting: 22 + 4 = 26 °C).
-04
SUM/
Antifreeze protection is guaranteed for each heating circuit,
regardless of the setting on the corresponding room temperature sensor. The room temperature in "antifreeze" mode is preset to +6 °C. This value can be modified if a room sensor is fitted.
See: Table of "User" setting.
Z
14/04/2010 - 300015090-001-L MIT-II - MIT/P - QUADROPAC DUP 500
7
Brief touch Several brief touches 1 long touch (5 seconds)
AUTO key Depending on the situation:
- Cancellation of the Daytime or Nighttime mode
- Confirmation of the antifreeze setting (or after 2 minutes)
Key%/
Key
Key
Key # (Located
under the flap)
$
.
Temporary activation (Until midnight) The arrow above the key flashes.
Temporary activation
Set the number of days' absence (current day = 1) using keys
(up to 99 days).
The arrow above the key flashes. Cancellation: The antifreeze mode is cancelled when the number of antifreeze days is reset to zero or when the set time has elapsed.
Temporary activation (Until midnight) The arrow above the key flashes.
__First press: Permanent activation
and
_
_
Deferred temporary activation:
- First brief touch: Set the number of days' absence (current day = 1) using keys
- Second brief touch: Set the start month using keys
- Third brief touch: Set the start day using keys
The arrow above the key flashes until the start day and then becomes steady. Cancellation: The antifreeze mode is cancelled when the number of antifreeze days is reset to zero or when the set time has elapsed
Second depression: Deactivation Permanent activation
and  (up to 99 days).
and .
and .
.
Cancels the message SHOW REM. CTRL which signals the presence of an
override on a remote control. The AUTO mode is forced on all existing heating circuits.
Permanent activation
The arrow above the key is steady.
Permanent activation
The arrow above the key is steady.
The permanent "antifreeze"
mode can also be selected using the TELCOM 2 remote voice monitoring module delivered as an option.
The arrow above the key is steady.
The heating is off. The symbol SU appears. Second depression: Deactivation
8
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