DeDietrich GTU 120 User manual

Range GT 120 - GTU C 120 - GT 220
Low temperature fuel oil boiler
Oil-fired condensation boiler
English
21/09/06
Instructions for
use

2GT 120 - GTU C 120 - GT 220 21/09/06 - 300003691-001-F
Contents
Important recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
1 Aeration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
2 Burner. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
3 Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
1 Boilers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
2 Control panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Commissionning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Stopping the boiler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
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

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21/09/06 - 300003691-001-F GT 120 - GTU C 120 - GT 220
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.
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).
Check the seal on the gas and water pipe connections.
Check that the appliance is correctly regulated for the type
of combustible used.
Keep to the polarity shown on the terminals : phase (L),
neutral (N) and earth 4.
To guarantee protection against the corrosion of domestic
hot water calorifiers fitted with a titanium anode (Titan
Active System® protection system), always leave the
control panel switched on. To switch off the heating or the
domestic hot water, use the Summer or Antifreeze mode.
1 Aeration
Warning:
In order to avoid damage to the boiler, it is necessary to prevent the
contamination of combustion air by chlorine and/or fluoride
compounds, which are particularly corrosive. These compounds are
present, for example, in aerosol sprays, paints, solvents, cleaning
products, washing products, detergents, glues, snow clearing salts,
etc. Therefore:
- Do not suck in air evacuated from premises using such products:
hairdressing salons, dry cleaners, industrial premises (solvents),
premises containing refrigeration systems (risk of refrigerant
leakage), etc.
- Do not stock such products close to the boilers.
If the boiler and/or peripheral equipment are corroded by such
chloride or fluoride compounds, the contractual guarantee
cannot be applied.
1.1 Chimney versions - Chimney condensation versions
Position the air inlets in relation to the high ventilation vents in order
that the air is refreshed throughout the boiler room. The minimum cross-sections and the positions of the fresh air inlet and the air outlet must comply with prevailing regulations.
Do not obstruct the air inlets in the room (even partially).
1.2 Forced flue versions (Not available in Germany)
- GTU 120 FF boilersare incompliancewiththe standardforfuel oil
boilers type C (XPD 35-430). They can be installed in all kinds of
premises whatever their volume, even if they do not include a
window or framed opening.
- TheymaybecommissionedonlyusingdevicessoldbyDeDietrich
(particularly concentric flues, connecting parts, terminals).
2Burner
ZRefer to the user instructions for the burner.

4GT 120 - GTU C 120 - GT 220 21/09/06 - 300003691-001-F
3 Maintenance
- The servicing and cleaning of the boiler and the sweeping of the
flue gas pipe and the bleed pot must be done at least once a year
by a qualified professional.
-Oil-fired condensation boiler: The condenser and the
condensates neutralisation station must serviced at least once a
year by a qualified professional.
To ensure safe operation of the boiler: The siphon and the
condensates evacuation conduit must imperatively be
checked and cleaned at least once a year.
Without an annual service, the siphon is in danger of becoming
blockedandthecondensateswillnolongerbeabletoflowoffandwill
fill the flue gas discharge pipe causing the boiler to malfunction.
- Regularly check the level of water in the installation. Top it up, if
needbe,avoidingtheabruptinputofcoldwaterintothehotboiler.
If this operation is repeated several times per season, locate the
leak and repair it.
- We recommend taking out a maintenance contract.
Do not drain the installation, except in cases of absolute
necessity.
For example: Several months' absence with the risk of ice
in the building.

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21/09/06 - 300003691-001-F GT 120 - GTU C 120 - GT 220
Description
1 Boilers
The models presented are marketed in the various countries according to the countries' specific sales programme.
GT 120
GTU 120 / GTU 120 FF / GTU C 120
GTU 1200 V / GTU 1200 V FF / GTU C 1200 V
GT 220

6GT 120 - GTU C 120 - GT 220 21/09/06 - 300003691-001-F
2 Control panel
2.1 Control panel B / B2
2.2 Control panel Easymatic E-E1 / Easyradio ER-E1R
Electromechanical components
1General ON 8/ OFF 7switch
2Alarm indicator
3Summer %/ Winter .switch
4TEST STB button
5Safety thermostat with manual reset
6Panel B: Timed circuit breaker (4 A)
Panel B2: Timed circuit breaker (6 A)
7Boiler thermostat
8Alternate display of the following temperatures:
- Light "lit: Water temperature in the boiler
- Light lit: Domestic hot water temperature
9domestic hot water thermostat
4
A
M
P
14
23 5 67
C000142_09
1General ON 8/ OFF 7switch
2Boiler thermometer
3Alarm indicator
4Switch AUTO/!
5 TEST STB button
6Safety thermostat with manual reset
7Timed circuit breaker (4 A)

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21/09/06 - 300003691-001-F GT 120 - GTU C 120 - GT 220
EASYMATIC regulator
STANDARD
MODE
PROG PROG
+
-
1234567
8575N077A
MODE
Temperature setting keys
2% Comfort temperature
2$ Reduced temperature
2 Domestic hot water temperature
+/-Is used to adjust the selected temperature
Operating mode selection keys
Key MODE:
AUTO Heating according to the time programme
%Forced Comfort mode
$Forced Low mode
.Antifreeze mode
#Summer mode
Key : Tank load enabled mode
DBurner on
:Circulator pump on
Available only on Easyradio
If the symbol flashes, replace the batteries
6Time and day adjustment key
Q" Access to the time programmes on the heating circuits.
Circuit A for Easymatic, circuit A and B for Easymatic 1.
Q Access to the time programmes on the DHW circuit
Programme key
%O Enter (per 1/2 hour) the comfort temperature period or tank
load enabled (dark area)
$O Enter (per 1/2 hour) the reduced temperature period or tank
load disabled (light area)
SReturn key

8GT 120 - GTU C 120 - GT 220 21/09/06 - 300003691-001-F
2.3 Control panel DIEMATIC 3
Electromechanical components
Display
4
A
M
P
C000142_07
1
0 2 4 6 8 1012141618202224
A
7
4
23 5 6
SUNDAY
-04
1General ON 8/ OFF 7switch
2Alarm indicator
3Switch AUTO/!
4 TEST STB button
5Safety thermostat with manual reset (110 °C)
6Timed circuit breaker (6 A)
7Operating light
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.)
7Active programme display, P1, P2, P3, P4
or
E: Summer mode activated
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 Symbol displayed above the active operating mode
11 Symbols indicating that the following inputs/outputs are
active
DHW load pump on
#Summer mode
TNot available
DBurner on
With optional package AD217:
`Operation with modulating burner
YBurner on with an increase in the output level
XBurner on with a reduction in the output level
DBurner on with a constant level
`Operation with 2-stage burner
DBurner on with 1 stage
YBurner on with 2 stages

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21/09/06 - 300003691-001-F GT 120 - GTU C 120 - GT 220
Keys accessible when the flap is closed
Keys accessible when the flap is open
3Burner
ZRefer to the user instructions for the burner.
Temperature setting keys
2% Comfort temperature
2$ Reduced temperature
2 Domestic hot water temperature
/Is used to adjust the selected temperature
Operating mode selection keys
AUTO Heating according to the time programme
%Forced Comfort mode:
- until midnight if flashes
- all the time if is steady
$Forced Low mode:
- until midnight if flashes
- all the time if is steady
.Antifreeze mode
Tank load enabled mode
#Manual "Summer" shutdown key
The heating is switched off and DHW production is
ensured. The symbols #and Eare displayed.
STANDARD "Standard" programme key
Reset of all time programmes.
KFitter settings access key
Key for access to setting and measurements
JPage scrolling
ILine scrolling
HReturn to the previous line
Programming 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)
SReturn key
A, B, C Circuit display selection key
PROG Active heating programme selection key (P1, P2, P3 or
P4)

10 GT 120 - GTU C 120 - GT 220 21/09/06 - 300003691-001-F
Commissionning
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. If using an oil-fired boiler, check the oil level in the tank.
3. Open the fuel oil inlet or the gas valve.
4. Control panel B / B2:
- Set the Summer/Winter swtich to
.
Control panel E / E1 / D:
-Setswitch AUTO/
!
to the AUTO position.
5. Set the On/Off switch to 8.
Stopping the boiler
Set the On/Off switch to 7.
On the Off position 7, the domestic hot water calorifier
fitted with a titanium anode is not protected against
corrosion.
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.
Precautions to take in the event of prolonged shutdown (one year or more)
- The boiler and the chimney must be swept carefully.
- Closethe dooroftheboilertopreventtheinternalcirculationof air. - Removethepipeconnectingtheboilertothechimneyandplugthe nozzle.
Troubleshooting
Checks to make before calling your fitter:
The burner will not start.
ZRefer to the user instructions for the burner.
The burner is operating but the radiators are cold.
- Bleed the radiators.
- Top up the primary circuit with water.
- Check that the heating pump is operating correctly.
- Ifitisoftennecessary to top up the installation with water, contact
your fitter.
Before informing the fitter of a fault, make a note of the following
information:
- Product type
- Serial number
- Type of combustible
This information can be found on the rating plate stuck to the
side panel of the boiler.