DeDietrich DTG 230 S User manual

DTG 230 S
Gas-fired boilers
User Guide
300011506-02
en

2DTG 230 09/03/2016 - 300011506-02
.
Contents
1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
1.1 Symbols used . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
1.2 General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
1.2.1 Manufacturer's liability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
1.2.2 Installer's liability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
1.2.3 User's liability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
2 Safety instructions and recommendations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
2.1 Safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
2.2 Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
3 Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
3.1 Main parts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
3.2 Control panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
3.2.1 B3 control panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
3.2.2 DIEMATIC-m3 control panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
3.2.3 K3 control panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
4 Operating the appliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
4.1 Commissioning the boiler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
4.2 Changing the settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
4.2.1 B3 control panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
4.2.2 DIEMATIC-m3 control panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
4.2.3 K3 control panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
4.3 Switching off the boiler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
4.3.1 Precautions to take if there is a danger of frost . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
4.3.2 Precautions to take in the event of prolonged shutdown (one year or more). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
4.1 Commissioning the boiler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
5 Checking and maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
6 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
6.1 Type plate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
6.2 Error messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
6.2.1 B3 control panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
6.2.2 DIEMATIC-m3 control panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
6.2.3 K3 control panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
6.3 Incidents and solutions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
7 Technical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
8 Energy savings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

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1. Introduction
1Introduction
1.1 Symbols used
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.
ZReference
Refer to another manual or other pages in this instruction
manual.
DHW: Domestic hot water
1.2 General
Congratulations on your choice of a high quality product. We
strongly advise you to read the following instructions in order to
guarantee the optimal operation of your appliance. We are sure
that it will be entirely to your satisfaction and will meet with all
of your expectations.
`Keep these instructions in a safe place close to the appliance.
`In the interest of customers, De Dietrich Thermique SAS are
continuously endeavouring to make improvements in product quality.
All the specifications stated in this document are therefore subject to
change without notice.
1.2.1 Manufacturer's liability
`The liability of De Dietrich Thermique SAS as the manufacturer may not
be invoked in the following cases:
- Failure to abide by the instructions on using the appliance,
- Faulty or insufficient maintenance of the appliance,
- Failure to abide by the instructions on installing the appliance
1.2.2 Installer's liability
The installer is responsible for the installation and commissioning of
the appliance. The installer must respect the following instructions:
`Read and follow the instructions given in the manuals provided
with the appliance,
`Carry out installation in compliance with the prevailing
legislation and standards,
`Perform the initial start up and carry out any checks necessary
When handing over the installation to the user, the installer will draw
the user's particular attention to the following points:
- The safety of the installation,
- The functioning of the installation and the boiler,
- Periodic maintenance to be done.
1.2.3 User's liability
To ensure the optimum operation of your appliance, we strongly
recommend that you abide by the following instructions :
`Read and follow the instructions given in the manuals provided
with the appliance.
`Call on qualified professionals to:
- Carry out installation in compliance with the prevailing legislation
and standards
- Perform the initial start up
- Carry out work on the appliance and the installation
- Ensure the Appliance is serviced in accordance with the
manufacturer's instructions by a suitable qualified person
- Get your installer to explain your installation to you.

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2. Safety instructions and recommendations
2 Safety instructions and recommendations
2.1 Safety instructions
Fire hazard
Do not stock products of an inflammable nature close to
the appliance.
If you smell gas, do not use a naked flame, do not smoke,
do not operate electrical contacts or switches (doorbell,
lights, motor, lift, etc.).
1.Shut off the gas supply
2.Open the windows
3.Extinguish all flames
4.Evacuate the premises
5.Contact a qualified professional
6.Inform the gas supplier
Risk of intoxication
Do not obstruct the air inlets in the room (even partially).
If you smell flue gases
1.Switch the appliance off
2.Open the windows
3.Evacuate the premises
4.Contact a qualified professional
Risk of being burnt
Avoid direct contact with the flame viewport.
Depending on the settings of the appliance:
- The temperature of the flue gas conduits may exceed 60°C
- The temperature of the radiators may reach 95°C
- The temperature of the domestic hot water may reach 65°C
Risk of damage
Do not stock chloride or fluoride compounds close to the
appliance.
Install the appliance in frost-free premises.
Do not neglect to service the appliance: Contact a qualified
professional or take out a maintenance contract for the annual
servicing of the appliance.
2.2 Recommendations
Only qualified professionals are authorised to work on the
appliance and the installation.
Before any work, switch off the mains supply to the
appliance.
Check regularly that the installation contains water and is
pressurised.
Keep the appliance accessible at all times.
Avoid draining the installation.
The appliance should be on Summer or Antrifreeze mode rather than
switched off to guarantee the following functions:
- Antifreeze protection
- Protection against corrosion on domestic hot water tanks fitted
with a titanium anode

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3. Description
3 Description
3.1 Main parts
7 to 13 sections 14 sections
1. Control panel
2. Factory fitted bridge
Connection for gas pressure switch (Option - Package GC191)
Natural gas: 12.5 mbar
Propane: 20 mbar
3. a:Gas valve - Stage 1
b:Gas valve - Stage 2
4. a:Flame inspection window - Stage 1
b:Flame inspection window - Stage 2
5. a: Ignition electrode
b: Ionization probe
6. Safety box
7. Valve connector - Stage 2
8. Safety control box and valve connector - Stage 1
9. Downdraught thermostat
7-9 sections: delivered with the boiler
10-14 sections: Option (Package GC22) - Factory fitted bridge
Russia: The downdraught thermostat is compusory for all
models of boiler and must be fitted systematically. The
downdraught thermostat is delivered with the
documentation package.
10. Not used (Factory fitted bridge)
11. Factory fitted bridge
- Connection for cyclical tightness controller (Option - Package
CY41)
or
- Connection for safety valve (Option - Package GC191)
8502N169A
1
27 8 9 10 11
3b
4b
5a 5b
4a
3a
6

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3. Description
3.2 Control panel
3.2.1 B3 control panel
1. General ON (1) / OFF (0) switch
2. Burner alarm indicator + Reset button
This light comes on when the safety control box is in safety
lockout (out of order).
3. Switch TEST-STB/./%
.: Heating and domestic hot water are in operation
%: Only domestic hot water is in operation
Position TEST-STB: Temporary action to test the safety
thermostat
4. Safety thermostat with manual reset
Set to 110° C
5. Timed circuit breaker (4 A)
6. Pump shutdown switch
7. Electronic thermostat (30 to 90 °C)
8. Heating on light
9. Location for flue gas thermometer (optional)
10. Switch for selecting the number of burner stages
(2-stage boilers)
11. Digital display
-Light 8 lit: Boiler temperature display
-Light
13 lit: Domestic hot water display
When preparing domestic hot water
12. Electronic thermostat (10 to 80 °C)
13. Domestic hot water on light
14. Location for hour run meter (Option)

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3. Description
3.2.2 DIEMATIC-m3 control panel
Electromechanical components
1. General ON (1) / OFF (0) switch
2. Burner alarm indicator + Reset button
This light comes on when the safety control box is in safety
lockout (out of order).
3. Switch AUTO/!/TEST-STB
AUTO: Automatic control
!: Manual control
TEST-STB: Temporary action to test the safety thermostat
4. Safety thermostat with manual reset
Set to 110° C
5. Timed circuit breaker (4 A)
6. Pump shutdown switch
7. Boiler thermostat (30 to 90 °C)
8. Boiler thermometer
9. Switch for selecting the number of burner stages
(2-stage boilers)
10. Connector USB
14. Boiler heat curve
15. Flap
16. Display
Display
024681012141618202224
A
3 4 5 6
91011
8
2
1
BC
7
SUNDAY
1Text and numerical display
2Graphic display bar for the programme in circuit A, B or C
3Light area: Reduced temperature heating period or tank load
disabled
4Dark area: Comfort temperature heating period or tank load
enabled
5Flashing cursor showing the current time
6Number display (current time, adjusted values, parameters,
etc.)
7Number of the boiler for which the parameters are displayed
8The arrows flash when setting values can be modified using
the +and -keys
9Circuit operation symbols
>Opening the 3-way valve
=Closing the 3-way valve
:Displayed circuit pump on
A B C Name of the circuit displayed
10
Arrows indicating the chosen time programme (P1, P2, P3 or
P4) for the circuit displayed, A, B, C, or the activation of the
manual summer mode
11 Symbols indicating that the following inputs/outputs are
active
DHW load pump on
#Summer mode (Automatic / Manual)
DBurner on
`Operation with modulating burner
Not used
`Operation with 2-stage burner
DBurner on with 1 stage
YBurner on with 2 stages

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3. Description
3.2.3 K3 control panel
1. General ON (1) / OFF (0) switch
2. Burner alarm indicator + Reset button
This light comes on when the safety control box is in safety
lockout (out of order).
3. Switch AUTO/!/TEST-STB
AUTO: This position enables automatic operation of the
installation in accordance with DIEMATIC-m 3 regulation
controls.
!: The boiler no longer takes orders from the DIEMATIC-m 3
regulation into account. The boiler is regulated by the boiler
thermostat(s).
TEST-STB: Temporary action to test the safety thermostat
4 Operating the appliance
4.1 Commissioning the boiler
Initial commissioning must be done by a qualified
professional.
1. Check the water pressure in the installation. Top up with more
water if necessary.
2. Open the gas valve.
3. Make the settings on the control panel:
`B3 control panel:
- Turn the switch TEST-STB/./% to
.
.
- Turn the pump shutdown switch to
9
- Set the boiler thermostat to the desired setting.
- When preparing domestic hot water: Set the DHW thermostat to
the desired setting. Setting 6 (approx 60) recommended.
`DIEMATIC-m3 control panel:
- Turn the AUTO /
!
/ TEST STB switch to AUTO .
- Turn the pump shutdown switch to
9
- Set the boiler thermostat to maximum (between 7½ and 9).
`K3 control panel (Secondary boiler in cascade with a
DIEMATIC-m3 boiler):
-Setswitch AUTO /
!
/ TEST STB to the AUTO position.
4. Turn the burner switch to 2(2 stage version)
5. Check that the safety thermostat has not triggered. Remove the
safety thermostat hood and press the reset button with a
screwdriver.
6. Set the On/Off switch to 1.
Only for DIEMATIC-m3 control panel:
When the boiler is switched on, the tank exchanger is purged
for one minute if a tank is connected and its temperature is
lower than 25°C.
If disgassing has already taken place, press the MODE key to
suspend disgassing.
Only for DIEMATIC-m3 control panel:
On commissioning, it is necessary to select the desired
language with the + and - keys and confirm with the MODE key.
4.2 Changing the settings
4.2.1 B3 control panel
Heating temperature setting: Set the boiler thermostat to the
desired setting.
Setting the domestic hot water temperature: Set the DHW
thermostat to the desired setting.

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3. Description
4.2.2 DIEMATIC-m3 control panel
Keys accessible when the flap is closed Keys accessible when the flap is open
4.2.3 K3 control panel
Heating temperature setting: Set the boiler thermostat to the
desired setting.
Make all other settings on the master boiler fitted with a DIEMATIC-
m3 control panel
Press the *key.
Adjustment keys
MODE Various operating modes can be selected by successively
pressing key MODE:
`AUTOMATIQUE
`DAY 7/7: Forced operation at permanent Day temperature
`DAY (Until midnight): Forced operation at temporary Day
temperature
`NIGHT 7/7: Forced operation at permanent Night
temperature
`NIGHT (Until midnight): Forced operation at temporary
Night temperature
`DAYS ANTIFREEZ: Antifreeze mode for the number of
days set
`HOLIDAY7/7: Permanent antifreeze mode
Restart key for a DHW calorifier load
`AUTOMATIQUE
`DHW: Restarts DHW load until midnight
`DHW 7/7: DHW load is forced permanently
After a few seconds, the display disappears but the mode is
activated.
+Display key for the various counters (number of burner start-ups,
number of burner operating hours, etc.)
2% Set temperatures Day (Heating / DHW / Pool)
2$ Set temperatures Night (Heating / DHW)
*Access key to the secondary boilers (Control panel K3) in a
cascade
If using only one boiler, this key is inactive.
(Setting the gradients for circuits A, B and C
)
Setting the parallel offsets DECAL.// DEP.A, DECAL.// DEP.B or
DECAL.// DEP.C for the heating curves on circuits A, B or C.
If the Day setting for one of the circuits, A, B or C, is above 30°C,
you no longer have access parallel offset on this circuit.
+/- Adjustment keys
Adjustment keys
%O Enter (per 1/2 hour) the comfort temperature period or
tank load enabled (dark area).
$P Enter (per 1/2 hour) the reduced temperature period or
tank load disabled (light area).
STANDARD
Simultaneously pressing the 2 keys, %O and
$P, resets all of the time programmes.
SReturn key
JPage scrolling
ILine scrolling
*Scroll of boilers connected
#Manual "Summer" shutdown key. The heating is
switched off and DHW production is ensured.
KFitter settings access key
MDO NOT USE

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3. Description
4.3 Switching off the boiler
Set the On/Off switch to 0.
DIEMATIC-m3 control panel
The panel must always be supplied with 230V voltage:
- to ensure the anti-grip of the heating pump,
- to ensure Titan Active System® operation when a titanium anode
is protecting the DHW tank.
Use the mode:
- summer to shut down the heating.
- antifreeze to shut down the boiler if you are to be absent.
4.3.1 Precautions to take if there is a danger of frost
Heating circuit:
Use a correctly dosed antifreeze to prevent the heating water
freezing. If this cannot be done, drain the system completely. In all
cases, consult the fitter.
Domestic hot water circuit:
Drain the domestic water tank and pipes.
4.3.2 Precautions to take in the event of prolonged shutdown (one year or more)
- Close the gas valve
- The boiler and the chimney must be swept carefully.
- Close the door of the boiler to prevent the internal circulation of air.
5 Checking and maintenance
Make the following checks at least 1 time a year:
- Checking the ignition burner
- Safety devices
- Water level
- Checking burner safety
- Checking the safety thermostat
- Checking the downdraught thermostat
Carry out the following maintenance at least 1 time a year:
- Cleaning main burner and ignition burner
- Cleaning of the heating body
- Cleaning painted surfaces

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6. Troubleshooting
6 Troubleshooting
6.1 Type plate
Before informing the fitter of a fault, make a note of the following
information:
Type of gas used
Boiler type
Manufacturing date
Year (01 = 2001, 02 = 2002, ...)
Week
Serial no. of the appliance
This information can be found on the rating plate stuck to the
front plate of the boiler.
6.2 Error messages
6.2.1 B3 control panel
XX-XX
Message Faults Probable causes Action
AL 50 Boiler sensor The sensor circuit has been broken or
short circuited.
The installation is stopped.
Advise the installer.
AL 52 Domestic hot water sensor The sensor is cut
The installation continues to operate but domestic hot
water heating is no longer covered.
Advise the installer.
AL td
Titanium anode
The titanium anode is in open circuit or
the tank is empty. Production of domestic hot water is stopped. This may be
reactivated for 24 hours by disconnecting and
reconnecting the power supply to the boiler.
Advise the installer.
AL tc
A short circuit has occurred on the
titanium anode or connection
reversed.

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6. Troubleshooting
6.2.2 DIEMATIC-m3 control panel
The last ten failures are memorised in the paragraph #DEF.
HISTORY
6.2.3 K3 control panel
No error messages displayed. See DIEMATIC-m3 control panel
display.
Message Probable causes Action
SHOW REM.CTRL The message SHOW REM.CTRL indicates the
presence of an override on a remote control.
To cancel the overrides on all remote controls, press the AUTO key for 5
seconds.
REVISION Boiler service required. Advise the installer.
DISGAS
When connecting voltage, if the hot water tank
temperature is below 25 ºC, the boiler carries out a
domestic water exchanger purge cycle.
Wait 1 minute.
AUX1.SENS.FAIL
AUX2.SENS.FAIL
UNIV.SENS.FAIL
DHW 2 S. FAIL
The sensor circuit has been broken or short
circuited. Advise the installer.
BOILER S.FAIL. The sensor circuit has been broken or short
circuited.
If the boiler sensor fails, the burner is controlled by the boiler thermostat and
the heating and DHW circuits operate normally.
Advise the installer.
OUTSI. S.FAIL. The sensor circuit has been broken or short
circuited.
The boiler setting is equal to BOILER MAX. but can be limited by the boiler
thermostat to a lower value.
- The valve setting is no longer ensured but monitoring the maximum
temperature of the circuit after the valve is ensured.
- Valves may be manually operated.
- Reheating the domestic hot water remains ensured.
Advise the installer.
DHW S. FAILURE The sensor circuit has been broken or short
circuited.
To ensure domestic hot water production, set the switch AUTO/!/TEST-
STB to !.
Advise the installer.
OUTL S.A FAIL.
OUTL S.B FAIL.
OUTL S.C FAIL.
The sensor circuit has been broken or short
circuited.
The circuit concerned goes from automatic to manual mode: The pump
operates.
Advise the installer.
ROOM S.A FAIL.
ROOM S.B FAIL.
ROOM S.C FAIL.
The sensor circuit has been broken or short
circuited.
The circuit concerned operates without any influence from the room sensor.
Advise the installer.
SMOKE S.FAIL. The sensor circuit has been broken or short
circuited.
This failure has no impact on the operating modes.
Advise the installer.
SWIM.A S.FAIL
SWIM.B S.FAIL
SWIM.C S.FAIL
The sensor circuit has been broken or short
circuited.
Pool reheating is independent of its temperature.
Advise the installer.
SOLAR S.FAIL The sensor circuit has been broken or short
circuited.
Reheating domestic hot water using the solar panel is no longer ensured.
Advise the installer.
ST.TANK S.FAIL The sensor circuit has been broken or short
circuited.
The hot water storage tank reheating operation is no longer assured.
Advise the installer.
TA-S SHORT-CIR The Titan Active System® is short-circuited.
Domestic hot water production is shut down and can be restarted using key
. The tank is no longer protected.
Advise the installer.
TA-S DISCONNEC The Titan Active System® is on an open circuit.
Domestic hot water production is shut down and can be restarted using key
. The tank is no longer protected.
Advise the installer.
TA-S FAILURE Internal problem. Switch off the current.
Advise the installer.

13
09/03/2016 - 300011506-02 DTG 230
6. Troubleshooting
6.3 Incidents and solutions
The burner is not working:
- Check the boiler thermostat settings.
- Shutdown by the safety thermostat due to accidental overheating
Check that the safety thermostat has not triggered. To restart the
boiler, reset the safety thermostat. Remove the safety thermostat
hood and press the reset button with a screwdriver. Carry out the
start-up operations again. Call your fitter.
- Check the circuit breaker
- The safety control box is malfunctioning (Fault indicator light
illuminated)
Press the resetting button of the burner. Call your fitter.
The burner is operating but the radiators are cold:
- Bleed the radiators.
- Top up the primary circuit with water.
If it is often necessary to top up the installation with water, contact
your fitter.
- Check that the heating pump is operating correctly.
- Check the position of the 3 position switch.
B3 control panel: TEST-STB/./%on ..
DIEMATIC-m3 control panel: AUTO/!/TEST STB on AUTO.
K3 control panel: AUTO/!/TEST STB on AUTO
- Check the boiler thermostat settings.

14 DTG 230 09/03/2016 - 300011506-02
7. Technical specifications
7 Technical specifications
(1) At nominal output (Stage 2)
(2) Boiler temperature: 80 °C
(3) Electrical power of the boiler only with no accessories
Conditions of use:
- Max. safety temperature: 110 °C
- Max. operating pressure: 6 bar
- Thermostat adjustable from 30 to 90°C
- Safety thermostat: 110 °C
8 Energy savings
Here are a few tips for saving energy:
- Install reflector panels behind the radiators.
- Do not cover the radiators. Do not hang curtains in front of the
radiators.
- Insulate pipes to prevent thermal losses and condensation.
- Do not obstruct aeration grates (even partially). They help to
reduce humidity in the home. The more humid a home, the more
heating it consumes.
- Turn heating off when airing a room (5 minutes a day is sufficient)
Avoid deregulating the thermostat. Switch the On/Off switch to Off.
- Do not shut down heating completely if you are absent. Lower the
thermostat by 3-4°C.
- Use the sun's heat as much as possible.
- Take showers rather than baths. Use a water-saving shower head.
DTG 230-...S 7 8 9 10 11 12 13 14
Useful output Stage1kW 2736364545545454
Stage2kW 546372819099108117
Smoke temperature (1) (2) °C 135 135 135 135 135 135 135 135
Minimumoutputtemperature°C 3030303030303030
Maximumoutputtemperature°C 9090909090909090
Maximum operating pressure bar
(MPa) 6 (0,6) 6 (0,6) 6 (0,6) 6 (0,6) 6 (0,6) 6 (0,6) 6 (0,6) 6 (0,6)
Electrical connection V/Hz 230/50 230/50 230/50 230/50 230/50 230/50 230/50 230/50
Electrical power
(1) (3)
B3
DIEMATIC-m3
K3
W
20
21
19
20
21
19
20
21
19
20
21
19
20
21
19
20
21
19
20
21
19
20
21
19
Gasconnection inchR1R1R1R1R1R1R1R1
Heating connection inch R1 1/2 R1 1/2 R1 1/2 R1 1/2 R1 1/2 R1 1/2 R1 1/2 R1 1/2
Internal diameter flue gas nozzle mm 160/180 180 180 200 200 200 225 225
Water content l 29 32.6 36.2 39.8 43.4 47 50.6 54.2
Net weight (without water) kg 230 257 283 305 334 357 386 408

15
09/03/2016 - 300011506-02 DTG 230
7. Technical specifications
Warranty
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.
Warranty terms
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 fitter). 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:
- applicable local laws and regulations
- specific requirements relating to the installation, such as national
and/or local regulations
- the manufacturer's instructions, in particular those relating to the
regular maintenance of the unit
- 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.
France
The preceding dispositions are not exclusive of benefits for the
purchaser of the legal guarantee as stated in Civil Code articles
1641 to 1648.
Poland
Warranty conditions are included in the warranty card.
Switzerland
The application of the warranty is subject to the terms and
conditions of sale, delivery and warranty of the company marketing
our products.
Belgium
The preceding dispositions about the contractual guarantee are not
exclusive of profit if the need arises for the purchaser in Belgium of
the applicable legal dispositions on hidden defects.
Italy
The duration of our warranty is shown on the certificate delivered
with the appliance.
Our liability as manufacturer may not be invoked in respect of
incorrect use of the appliance, incorrect or insufficient maintenance
thereof, or incorrect installation of the appliance (you must
therefore ensure that installation and maintenance operations are
carried out respectively by a qualified professional and by an after
sales service company).
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.
Russia
The foregoing provisions in no way affect the rights of the
consumer, which are guaranteed by the legislation of the Russian
Federation as regards hidden defects.
The terms and conditions of warranty and the terms and conditions
of application of the warranty are indicated on the warranty form.
The warranty shall not apply as regards the replacement or repair
of wearing parts under normal use. Such parts include
thermocouples, injection nozzles, flame control and ignition
systems, fuses and gaskets.
Turkey
Due to the laws and regulations the product life for this product is
10 years. During that time the producer and/or the distributor has
to provide after sales services and spare parts.
Other countries
The above provisions do not restrict the benefit of the legal laws
regarding hidden defects applicable in the buyer's country.

© 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.
Subject to alterations.
09/03/2016
DE DIETRICH THERMIQUE
57, rue de la Gare F- 67580 MERTZWILLER - BP 30
AD001NU-AJ
DUEDI S.r.l.
DE DIETRICH SERVICE
BDR Thermea (Czech republic) s.r.o
www.duediclima.it
www.dedietrich.cz
Distributore Ufficiale Esclusivo
De Dietrich-Thermique Italia
www.dedietrich-heiztechnik.com
Freecall 0800 / 201608
Jeseniova 2770/56
130 00 Praha 3
+49 (0)25 72 / 9161-0
+49 (0)25 72 / 9161-102
[email protected]
Via Passatore, 12 - 12010
San Defendente di Cervasca
CUNEO
[phone]
[phone]
[email protected]
[phone]
[email protected]
IT
DE DIETRICH THERMIQUE Iberia S.L.U.
www.dedietrich-calefaccion.es
C/Salvador Espriu, 11
08908 L’HOSPITALET de LLOBREGAT
[phone]
[email protected]
ES
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[phone]
CZ
DE DIETRICH THERMIQUE S.A.S
[email protected]
300011506- 001- 02