DeDietrich GTU C 330 Manual

C001933-C
GTU C 330
Oil-fired condensing boiler
300016152-001-C
EN
Installation and
Service Manual

2GTU C 330 07/04/2009 - 300016152-001-C
Declaration of conformity 1
The appliance complies with the standard model described in
declaration of compliance 1. It is manufactured and distributed
pursuant to the requirements of European Directives. The original of
the declaration of compliance is available from the manufacturer.
C001950

3
07/04/2009 - 300016152-001-C GTU C 330
Contents
1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
1.1 Symbols and abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
1.2 General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
1.2.1 Manufacturer's liability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
1.2.2 Installer's liability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
1.2.3 User's liability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
1.3 Homologations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
2 Safety instructions and recommendations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
2.1 Safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
2.2 Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
3 Technical description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
3.1 General description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
3.2 Technical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
3.3 Main parts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
3.3.1 Control panels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
3.3.2 Boiler and Condenser . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
3.4 Operating principle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
4 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
4.1 Regulations governing installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
4.1.1 In general . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
4.1.2 In particular for France . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
4.1.3 In particular for Germany . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
4.2 Package list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
4.3 Mounting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
4.3.1 Position of the boiler. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
4.3.2 Aeration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
4.3.3 Main dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
4.3.4 Assembling the appliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
4.4 Example of an installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
4.5 Hydraulic connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
4.5.1 Regulations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
4.5.2 Hydraulic connection of the heating circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
4.5.3 Hydraulic connection of the water circuit for domestic use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
4.5.4 Water discharge connection (Sludge removal) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
4.5.5 Safety valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
4.5.6 Connecting the condensates discharge conduit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
4.5.7 Water treatment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
4.5.8 Refilling the installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
4.6 Connecting the burner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
4.7 Flue gas system connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
4.7.1 Flue size. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
4.7.2 Connection to the flue gas pipe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
4.8 Electrical connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
4.8.1 Electrical connection of the safety control box on the condenser and the recycling pump . . . . . . . . . . . . . . . . . . . . . . . . .28
4.8.2 Other electrical connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
5 Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
5.1 Filling the siphon (Option). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
5.2 Check points before commissioning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
5.3 Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
6 Stopping the boiler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32

4GTU C 330 07/04/2009 - 300016152-001-C
6.1 Placing the plant out of service. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
6.2 Antifreeze protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
6.2.1 Precautions required in the case of long boiler stops (one or more years) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
6.2.2 Precautions required if the heating is stopped when there is a risk of freezing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
7 Checking and maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
7.1 Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
7.2 Hydraulic pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
7.3 Draining . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
7.4 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
7.4.1 Boiler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
7.4.2 Condenser maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37
7.4.3 Flue gas system maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39
7.4.4 Maintenance of the burner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40
7.4.5 Siphon maintenance - (Option) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40
7.4.6 Condensates neutralisation system - (Option) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40
8 Spare parts - GTU C 330 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41

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07/04/2009 - 300016152-001-C GTU C 330
1Introduction
1.1 Symbols and abbreviations
In these instructions, various markings and pictograms are used to
draw your attention to particular information. In so doing, De Dietrich
Thermique S.A.S. wishes to safeguard the user's safety, obviate
hazards and guarantee correct operation of the boiler.
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.
Specific information.
ZReference
Refer to another manual or other pages in this instruction
manual.
`DHW: Domestic hot water.
1.2 General
1.2.1 Manufacturer's liability
De Dietrich Thermique S.A.S. manufactures products in
compliance with the standard 1. Products are delivered with 1
marking and all documents required.
In the interest of customers, De Dietrich Thermique S.A.S. are
continuously endeavouring to make improvements in product quality.
All the specifications stated in this document are therefore subject to
change without notice.
The liability of De Dietrich Thermique S.A.S. as the manufacturer
may not be invoked in the following cases:
`Incorrect use of the appliance.
`Faulty or insufficient maintenance of the appliance.
`Incorrect installation of the appliance.
1.2.2 Installer's liability
The installer is responsible for the installation and inital start up of the
appliance. The installer must respect the following instructions:
`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.
`Explain the installation to the user.
`Warn the user of the obligation to check the appliance and
maintain it in good working order.
`Give all the instruction manuals to the user.
1.2.3 User's liability
To guarantee optimum operation of the appliance, the user must
respect the following instructions:
`Read and abide by the instructions given in the user manual.
`Call on qualified professionals to carry out installation and initial
start up.
`Get your fitter to explain your installation to you.
`Have the required checks and services done.
`Keep the instruction manuals in good condition close to the
appliance.

6GTU C 330 07/04/2009 - 300016152-001-C
1.3 Homologations
In general
CE identification no: 1312BT175R
In particular for Germany
GTU C 330 boilers comply with Regulation 1. BlmSchV.

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07/04/2009 - 300016152-001-C GTU C 330
2 Safety instructions and recommendations
2.1 Safety instructions
For a proper operating of the boiler, follow carefully the
instructions.
Only qualified professionals are authorised to work on the
appliance and the instalation.
Incorrect use or unauthorised modifications to the
installation or the equipment itself invalidate any right to
claim.
The condensates in oil-fired condensing boilers are acidic
(2 < pH < 3): The installation of a condensates
neutralisation system is recommended.
Before any work, switch off the mains supply to the
appliance.
Keep to the polarity shown on the terminals: phase (L),
neutral (N) and earth 4.
Keep children away from the boiler.
Fire hazard
It is forbidden to store inflammable products and materials
in the boiler room or close to the boiler, even temporarily.
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
Depending on the settings of the appliance:
- The temperature of the flue gas conduits may exceed 65°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 premises sheltered from rain, snow
and frost.
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
• Check regularly that the installation contains water and is
pressurised.
• Keep the appliance accessible at all times.
• Avoid draining the installation.
• Use only original spare parts.
• Never remove or cover labels and rating plates affixed to the
appliance.
• The appliance should be on Summer or Antrifreeze mode rather
than switched off to guarantee the following functions:
- Cleaning the pumps
- Antifreeze protection
- Protection against corrosion on domestic hot water tanks fitted
with a titanium anode

8GTU C 330 07/04/2009 - 300016152-001-C
3 Technical description
3.1 General description
GTU C 330 boilers are intended for central heating using radiators or
underfloor heating. These boilers have the following characteristics:
- Hot water condensing boilers,
- Heating body in cast iron,
- Condenser
- Pressurised boiler,
- Connecting to a chimney
-S3, B3, K3 or DIEMATIC-m3 control panel (See below)
- Boiler delivered with a preset atomisation burner, using fuel oil
- Production of domestic hot water can be ensured by a separate hot
water calorifier.
The boiler, condenser and burner enable the use of all types of
oil :
- Standard fuel oil
- Oil with low sulphur content.

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07/04/2009 - 300016152-001-C GTU C 330
3.2 Technical characteristics
(1) Stand-by losses, according to the standard EN 304
(2) as a % of stand-by losses
(3) At nominal output
(4) Maintenance consumption, as a % of the input - according to the
standard EN15034
1 mbar = 10 mmCE = 10 daPa.
Conditions of use:Test conditions:
Maximum operating temperature: 90 °C CO2Fuel oil = 13%
Maximum operating pressure: 4 bar Ambient temperature: 20 °C
Thermostat adjustable from 30 to 90°C
Safety thermostat: 110 °C
80°C limiter thermostat - Condenser
Flue gas temperature safety thermostat: 120 °C
Boiler GTU C 334 335 336 337 338 339
Nominal output Pn by 50/30°C kW 93.4 120.3 157.3 192.7 239.7 291.2
PCI efficiency - 100 % Pn - Average temperature:
70 °C % 97.8 96.9 96.4 98.1 97.7 97.6
PCI efficiency - 30 % Pn - Return temperature: 50 °C % 101.5 101.4 101.1 102.2 101.8 101.5
PCI efficiency - 30 % Pn - Return temperature: 30 °C % 103.0 102.8 103.0 104.7 104.0 103.8
Nominal water flow (Nominal output) - ∆T = 20K m3/h 4.019 5.178 6.769 8.293 10.312 12.530
Stand-by losses (1) , ∆T =
30K W315 335 350 495 500 510
Losses through the outer
casing (2) %697378838793
Auxiliary electrical power (3) W325 435 650 625 625 1100
Useful output range by 50/30°C kW 56.7-93.4 93.7-120.3 120.2-157.3 155.4-192.7 191.7-239.7 238.4-291.2
Useful output range by 80/60°C kW 55-90 90-115 115-150 150-185 185-230 230-280
Water content l113 133 153 177 197 217
Loss of load hydraulic circuit
∆T = 10K (1) mbar 11 18 31 46 68 105
∆T = 15K (1) mbar 4.6 7.4 14.2 19.5 30.1 46
∆T = 20K (1) mbar 2.6 4.2 8.0 11 17 26
Combustion chamber
Inscribed diameter mm 377 377 377 377 377 377
Length mm 613 718 854 993 1117 1245
Volume m30.096 0.122 0.148 0.174 0.200 0.226
Numberofsections 456789
Number of baffle plates 6 10 10 10 12 12
Mass flue gas flow rate (3) - by 50/30°C Kg/h 149 191 248 306 381 463
Flue gas temperature (3) °C 50 55 61 62 63 65
Pressure available at the flue gas nozzle mbar 1.0 0.6 1.8 1.9 1.6 1.7
Loss of load flue gas side mbar 0.45 0.8 1.0 1.3 1.6 2.3
Maintenance consumption (4) ∆T = 30K % 0.38 0.32 0.25 0.28 0.23 0.19
Burner type GTU C 330 M202-2S M302-1S M302-3S M302-3S M302-4S M302-5S
Weight (empty) kg 678 802 912 1117 1239 1366

10 GTU C 330 07/04/2009 - 300016152-001-C
3.3 Main parts
3.3.1 Control panels
GTU C 330 S3: Boiler with basic control panel
Standard panel to be fitted
Panel comprising the settings, control and safety devices allowing
the boiler to operate autonomously, without regulation.
The standard panel is used to connect the boiler to the boiler room
control cabinet.
This cabinet can be fitted with control units.
GTU C 330 B3 : Boiler with electronic control panel.
Separate panel
Top of the range electronic control panel with digital display,
comprising the settings, control and safety devices allowing the boiler
to operate autonomously.
The control panel is used to control boilers with 1 or 2-stage burners.
This panel makes it possible to give priority to DHW.
Side panel
A version of the B3 control panel with lateral attachment is also
available.

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GTU C 330 DIEMATIC-m3 Boiler with DIEMATIC-m3 electronic control panel
Separate panel
Top of the range electronic control panel with digital display,
comprising the settings, control and safety devices allowing the boiler
to operate autonomously.
The DIEMATIC-m3 panel is fitted as standard with a control unit
which operates according to the outside temperature.
The control panel enables the operation of a boiler fitted with a 1
stage, 2 stage or modulating burner.
The DIEMATIC-m3 panel also allows the boiler to be used as a
"master" boiler for installations with 2 to 10 boilers in cascade.
The other boilers (1 to 9) must be fitted with a "K3" control panel.
Side panel
A version of the DIEMATIC-m3 control panel with lateral
attachment is also available.
GTU C 330 K3: Boiler with K3 control panel
Separate panel
The K3 control panel is fitted only in association with a boiler fitted
with a DIEMATIC-m3 control panel as part of a cascade installation
(2 to 10 boilers can be connected in a cascade).
The control panel enables the operation of a boiler fitted with a 1
stage, 2 stage or modulating burner.
Side panel
A version of the K3 control panel with lateral attachment is also
available.

12 GTU C 330 07/04/2009 - 300016152-001-C
3.3.2 Boiler and Condenser
1
2
5
7
6
3
10
11
8
4
C001936-B
1
2
5
6
7
3
10
9
11
8
4
C
1Burner
2Control panel
3Heating flow pipe
4Boiler flue gas system / condenser connection pipe
5Condenser
6Condenser safety control box. The box comprises ;
- 80°C limiter thermostat
- Safety thermostat with manual reset, set to 120 °C. This
thermostat monitors the temperature of the combustion
products.
7Boiler / condenser hydraulic connecting kit
8Adjustable feet
9Condensates evacuation pipe
10 Heating return pipe
11 Recycling kit (Option).
Used to read the return temperature.

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3.4 Operating principle
Boiler operation is managed by the control panel according to the
outside temperature and the heating request.
When the burner is operating, the combustion products pass through
the boiler where an initial heat transfer is made to the heating water.
The combusted gases then pass through the condesner where a
second heat transfer is made. The heat recycled from the condenser
by the exchanger is reinjected into the heating circuit.
The condenser is protected by 2 thermostats:
- The manual reset safety thermostat, which monitors the
temperature of the combustion products at the condenser outlet.
This thermostat cuts the mains supply to the burner if the
temperature reaches 120°C.
- The automatic reset limiter thermostat, which monitors the heating
water temperature in the condenser. This thermostat cuts the
mains supply to the burner if the temperature reaches 80°C.
The combustion products are discharged through the flue gas nozzle
on the condenser.
The condensates are collected in the bottom of the condenser
whence they are discharged to a siphon and then to a neutralisation
station. The siphon, which has a large water storage capacity,
ensures the tightness of the combustion products discharge pipe.
The condensates in oil-fired condensing boilers are acidic. We
recommend the installation of a condensates neutralisation system to
protect the pipes and the environment.
The neutralisation station must include an adapted filter with granules
and activated carbon. The neutralisation station that we provide
includes this kind of filter (Package MD225).
The neutralised condensates can then be discharged into the waste
water network.

14 GTU C 330 07/04/2009 - 300016152-001-C
4 Installation
4.1 Regulations governing installation
4.1.1 In general
The installation and maintenance of the boiler must be done by a
qualified professional in compliance with the prevailing local and
national regulations.
Caution
In the case of installation on an old network, we strongly
recommend carrying out "desludging" and careful rinsing
of the installation before you install the new boiler. Install
a sludge decanting pot on the return pipe, very close to the
boiler.
When assembling and installing the appliance, abide by the following
directives.
4.1.2 In particular for France
DTU 24.1 and DTU 65.4 define the technical terms and conditions
with which the boiler room installation work must comply.
Residential buildings
Statutory terms and conditions of installation and maintenance:
The installation and maintenance of the appliance must be carried
out by a qualified professional in compliance with the statutory texts
of the codes of conduct in force, particularly:
- Order of 2 August 1977
Technical and safety rules applicable to combustible gas and
liquefied hydrocarbon installations situated inside residential
buildings and their annexes.
- NF P 45-204 standards
Gas installation, (formerly DTU 61-1, gas installations: April 1982,
addendum no 1: July 1984).
- Local Sanitary Regulations
For appliances connected to the electricity network:
- NF C 15-100 standards Low voltage electrical installation - Rules..
Establishments open to the public
Statutory terms and conditions of installation:
The installation and maintenance of the appliance must be carried
out in compliance with the statutory texts and rules of the codes of
conduct in force, particularly:
- Safety regulations against fire and panic in establishments open to
the public:
a. General regulations
For all appliances:
- Articles GZ - Installations operating on combustible gases and
liquefied hydrocarbons.
Then, depending on use:
- Articles CH-Heating, ventilation, refrigeration, air conditioning and
production of steam and domestic hot water.
b. Instructions specific to each type of establishment open to the
public (hospitals, stores, etc.).
Certificate of compliance
For the application of article 25 of the modified decree dated 02/08/
1977 and of article 1 of the modifed decree dated 05/02/1999, the
installation engineer must be in possession of the certificates of
compliance approved by the Ministries in charge of construction and
gas safety:
- Different forms (forms 1, 2 or 3) for a new gas installation
- "Model 4" in particular after replacing a furnace with a new one

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4.1.3 In particular for Germany
Respect the following standards, regulations and directives when
installing and commissioning condensing boilers:
- Regulations on construction and combustion equipment
- DIN EN 12828 (June 2003 edition): heating systems in buildings.
Planning of hot water heating installations (up to a maximum
operating temperature of 105°C and a maximum output of 1 MW)
- DIN 4753: drinking and industrial water heating installations
- DIN 1988: technical rules on drinking water installations (TRW)
- Water REsources Act - chapter 19
4.2 Package list
ZSee assembly instructions
Options
- Recycling kit- Package MD218
Used to raise the boiler return temperature. If using a condenser on
exclusively low temperature heating circuits (e.g. underfloor heating),
we recommend the use of a recycling kit to ensure a rise in the return
temperature.
- Siphon for condensates discharge - Package MD217
We strongly recommend using this siphon for the following reasons:
- The siphon, which has a large water storage capacity, ensures the
tightness of the combustion products discharge pipe
- To ensure that the boiler / condenser unit works correctly
- The siphon absorbs the excess burner start-up pressure thanks to
its appropriate water volume and water storage capacity.
- The capacity of the siphon prevents it being blocked by the
accumulation of any combustion residues.
- Condensates neutralisation system - Package MD225
The condensates in oil-fired condensing boilers are acidic
(2 < pH < 3): We recommend the installation of a condensates
neutralisation system to protect the pipes and the environment.
The condensates flow successively through compartments filled with
active carbon and granules and are thus duly neutralised (pH higher
than 6.5). The neutralised condensates can then be discharged into
the waste water network.
Granule and activated carbon refill kits are available - Package
MD226
-Lifting pump for the discharge of condensates to a higher
sewer conduit, Maximum lift height: 3.5 m - Package FM158
ZRefer to the applicable price list for the other optional features
(control units etc.) which may be used with these boilers.

16 GTU C 330 07/04/2009 - 300016152-001-C
4.3 Mounting
4.3.1 Position of the boiler
Location of the installation
GTU C 330 boilers must be installed in a frost-free room.
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.
The warranty does not apply to damage to the boiler caused by these
instances. If the heating device is installed in residential premises
where people are present all the time, it is necessary to use a
concentric ambient air inlet / combustion gas evacuation installation.
When installing the boiler, it is necessary to comply with degree of
protection IP21.

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Position of the boiler
The dimensions (in mm) correspond to the minimum recommended dimensions needed to ensure adequate accessibility around the boiler.:
Pay attention to the overall volume of the burner when the door is open. To install several boilers in cascade, these dimensions
should be adapted accordingly.
B
0,15
(1)
1,4m
C001735
(1)
0,15
1,2m
B
Boiler GTU C 334 335 336 337 338 339
Size A mm 1748 1908 2068 2748 2908 3068
B
Standard panel S3 mm 105 105 105 105 105 105
Panel K3
B3
DIEMATIC-m3
mm 190 190 190 190 190 190
(1) Recycling kit (Option)

18 GTU C 330 07/04/2009 - 300016152-001-C
4.3.2 Aeration
To allow the input of combustive air, sufficient ventilation must be
provided in the boiler room, for which the cross section and
emplacement must satisfy regulations in force in the country in which
the boiler is installed.
Caution:
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.
Position the air inlets in relation to the high ventilation vents in order
that the air is refreshed throughout the boiler room.
Do not obstruct the air inlets in the room (even partially).
The minimum cross sections and the emplacement of the fresh air
inlet and the air discharge are governed by the order of 21/03/1968
amended by the orders of 26/02/1974 and 03/03/1976.
Generator installed in a building for collective use
(installations less than 70 kW)
`The fresh air inlet must:
- Come out in the lower section of the premises,
- Have a free minimum cross section calculated on the basis of 0.03
dm² per kilowatt installed output and at least equal to 2.5 dm².
`The air discharge must:
- Be located in the upper section of the premises,
- Rise above the roof (unless using an equivalent system which
does not cause a nuisance to neighbours),
- Have a free cross section (corresponding to 2/3 of that of the air
inlet and at least equal to 2.5 dm²).
Generator installed in a builing for individual use
`An adequate supply of fresh air must be provided as close as
possible to the appliances. Its cross section must be at least 0.5
dm².
`In the upper section of the premises, an air outlet must ensure
effective ventilation.
Establishments open to the public
`New establishment: Refer to the order of 25/06/1980
(installations of more than 20 kW and less than or equal to 70
kW).
`Existing establishment: Refer to the order of 25/06/1980
(installations less than 70 kW).

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4.3.3 Main dimensions
GTU C 330 - 4 to 6 sections
GTU C 330 - 7 to 9 sections
(1)Adjustable feet: Basic dimension 0 mm. Can be adjusted from
0 mm to 40 mm
(2) The lateral control panel can be mounted to the right or left of
the boiler. Exact height positioning defined by the fitter during
assembly.
(3) Recycling kit (Option).
Heating outlet (Flange + Counter flange with collar to be welded)
orifice Ø 2" 1/2 (*)
Heating return (Flange + Counter flange with collar to be welded)
orifice Ø 2" 1/2 (*)
Flue gas outlet
Rp 1 1/2 socket for the safety control unit
Condensates discharge - (connection for 40 mm interior
diameter pipe)
(*) Ø 2" (Option)
Mk: Tapped connection
R: Thread
2
3

20 GTU C 330 07/04/2009 - 300016152-001-C
4.3.4 Assembling the appliance
ZSee assembly instructions
Boiler GTU C 334 GTU C 335 GTU C 336 GTU C 337 GTU C 338 GTU C 339
Standard panel S3 A 130 130 130 130 130 130
B 105 105 105 105 105 105
C454545454545
D 738 738 738 738 738 738
H 1297 1297 1297 1297 1297 1297
Table
K3
+DIEMATIC-m3
+ B3
A 335 335 335 335 335 335
B 190 190 190 190 190 190
C454545454545
D 755 755 755 755 755 755
H 1387 1387 1387 1387 1387 1387
P (mm) 490 650 810 970 1130 1290
E (mm) With (3) - - - 407 407 407
Without (3) - - - 257 257 257
F (mm) With (3) 704 704 704 554 554 554
Without (3) 554 554 554 304 304 304
L (mm) 2297 2457 2617 3297 3457 3617
Flue gas outlet DN160 DN160 DN160 DN200 DN200 DN200