DeDietrich GT 330 Owner's manual

GT 330
Fuel oil/gas-fired boilers English
10/04/06
Technical
instructions

2GT 330 10/04/06 - 300007650-001-A
Contents
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
1 The various existing control panels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
1.1 standard control panel- S3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
1.2 Control panel K3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
1.3 Control panel DIEMATIC-m3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
1.4 Control panel B3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
2 Technical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
2.1 Boilers for following countries: France, Belgium, Austria, Spain, Slovenia, Czech Republic. . . . . . . . . . . . . . . . . . . . . . . . .7
2.2 Boilers for Switzerland . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
2.3 Boilers for following countries: Germany, Poland . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
2.4 Boilers for EXPORT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
3 Main dimensions - GT 330 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Position of the boiler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Hydraulic connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
1 Important recommendations on connecting the heating circuit to the boiler and the drinking water system . . . . . . . . . . . . . . . . . . . .13
2 Important recommendations for connecting the boiler to the heating circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
3 Refilling the installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
4 Sludge removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Chimney connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
1 Flue size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
2 Connection to the flue gas pipe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Fuel-oil or gas connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Electrical connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
1 Installation - Water level - Draining . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
2 Boiler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
2.1 Cleaning the flue gas circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
2.2 Cleaning the combustion chamber. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
2.3 Positioning of the baffle plates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
2.4 Cleaning the flue gas box. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
2.5 Maintenance of the burner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
3 Precautions required in the case of long boiler stops (one or more years) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
4 Precautions required if the heating is stopped when there is a risk of freezing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
Identification plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
Spare parts - GT 330 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27

3
10/04/06 - 300007650-001-A GT 330
Declaration of compliance 1
Manufacturer DE DIETRICH THERMIQUE S.A.S.
57 rue de la gare
F-67580 MERTZWILLER
*[phone]
++33 (0)3 88 80 27 99
Issued by See end of notice
We hereby certify that the series of appliances specified hereinafter is in compliance with the standard model described in the EC declaration
of compliance, and that it is manufactured and marketed in compliance with the requirements and standards of the following European
Directives:
Product type GT 330 - Low temperature fuel oil boiler
Formats 4, 5, 6, 7, 8, 9, sections
Standard applied -90/396/EEC Gas Appliance Directive
Reference Standard : EN 267 ; EN 303.3
-73/23/EEC Low Voltage Directive
Reference Standard : EN 60.335.1
-89/336/EEC Electromagnetic Compatibility Directive
Generic standards : EN1000-6-3 ; EN 61000-6-1
-92/42/EEC Efficiency Directive
Reference Standards : EN 303.2 ; EN 304
Inspecting organisation AFNOR:
- PV n° FC011
- PV n° FC012
- PV n° FC013
- PV n° FC014
Date: 13 March 2006 Signature
Technical Director
M. Bertrand Schaff

4GT 330 10/04/06 - 300007650-001-A
Introduction
This product will be marketed in following countries:
FR, DE, BE, CH, ES, AT, PL, SL,
CZ, CA, CN, GR, RO, TN, USA, RU
with a gas or oil-burner of the associated category.
Directive 97/23/EC
Gas and oil boilers with a maximum operating temperature of 110°C
and hot water tanks with a maximum operating pressure of 10 bar
pertain to article 3.3 of the directive, and therefore, cannot be CE-
marked to certify compliance with the directive 97/23 EC.
The boilers and hot water tanks are designed and manufactured in
accordance with the sound engineering practice, as requested in
article 3.3 of the directive 97/23/EC; it is certified by compliance with
the directives 90/396/EC, 92/42/EC, 73/23 EC and 89/336/EC.
CE identification no: 13 12 BR 46 17
France:
Certificate of compliance (only concerns GT 330 boilers fitted
with a gas burner)
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
Switzerland:
Accreditation no. OFEFP:293010
Accreditation no. AEAI:8088
Warning
The boiler shall be assembled and installed by a qualified
professional only.
For a proper operating of the boiler, follow carefully the instructions.
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

5
10/04/06 - 300007650-001-A GT 330
Description
The boilers of the GT 330 range are pressurised hot water boilers
designed for connecting to a flue pipe which require a separate
automatic fuel-oil or gas burner.
1 The various existing control panels
1.1 standard control panel- S3
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.
1.2 Control panel K3
Separate panel
Panel comprising the settings, control and safety devices allowing
the boiler to operate autonomously.
Panel K3 also allows the boiler to be used as a "slave" boiler for
installations with 2 to 10 boilers in cascade, one of which is fitted with
a "DIEMATIC-m3" control panel.
1.3 Control panel DIEMATIC-m3
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 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.
M000483
l
0
30
10A
TEST
STB

6GT 330 10/04/06 - 300007650-001-A
1.4 Control panel B3
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.
This panel makes it possible to give priority to DHW.
M000495
8
8
4
1
5
6
7
8
2
4
3
l
0
10A
60
1
5
6
7
8
2
4
3
1
5
6
7
8
2
4
3
r
r
2
t
TEST
STB

7
10/04/06 - 300007650-001-A GT 330
2 Technical characteristics
2.1 Boilers for following countries: France, Belgium, Austria, Spain, Slovenia, Czech Republic
In order for the boiler to operate correctly, it is imperative
to respect the draught at the nozzle: 0 at the nozzle.
*Maintenance consumption: total heat emission when the burner is
off as a percentage of the nominal input power when the difference
between the mean boiler temperature and the room temperature is
30 K.
(A)Loss when not operating in accordance with NFD 30002 standard
at % of input power.
(B)Nominal operation (top boiler power).
(C)1 mbar = 10 mmCE = 10 daPa.
(D)Pressure in the furnace for nozzle pressure = 0.
In no event must the draught at the nozzle exceed 0.2 mbar.
Conditions of use:Test conditions:
Maximum operating temperature: 100 °C CO² Fuel oil = 13%
Maximum operating pressure: 6 bar CO² Natural gas = 9.5%
Thermostat adjustable from 30 to 90°C Ambient temperature: 20 °C
Safety thermostat: 110 °C
Boiler GT 334 GT 335 GT 336 GT 337 GT 338 GT 339
Useful output kW 55-90 90-115 115-150 150-185 185-230 230-280
Power input kW 61-100 100-128 128-167 167-206 206-256 256-311
Water capacity l 96 116 136 156 176 196
Number of sections 456789
Losses when off - 50 °C (A) % 0.150 0.135 0.125 0.115 0.100 0.085
Number of baffle plates 6 1010101212
Water resistance
∆T = 10K (B) (C) mbar 11 18 31 46 68 105
∆T = 15K (B) (C) mbar 4.6 7.4 14.2 19.5 30.1 46
∆T = 20K (B) (C) mbar 2.6 4.2 8 11 17 26
Flue gas temperature (B) °C < 200 < 190 < 190 < 190 < 190 < 190
Pressure in the furnace for nozzle pressure = 0 (B)
(D)
mbar
(C) 0.20.40.71.21.82.2
Mass flue gas flow rate (B) Fuel oil Kg/h 151 192 252 309 383 465
Natural gas Kg/h 159 211 277 340 422 512
Combustion chamber
Recorded diameter mm 377 377 377 377 377 377
Length mm 621 781 941 1101 1261 1369
Volume m30.096 0.122 0.148 0.174 0.200 0.226
Maintenance consumption* ∆T = 30K % 0.150 0.135 0.125 0.115 0.100 0.085
Weight (empty) kg 612 736 846 981 1103 1230

8GT 330 10/04/06 - 300007650-001-A
2.2 Boilers for Switzerland
In order for the boiler to operate correctly, it is imperative
to respect the draught at the nozzle: 0 at the nozzle.
(A)Standby consumption LVR 92
(Boiler temperature: 70 °C)
(B)1 mbar = 10 mmCE = 10 daPa.
(C)Pressure in the furnace for nozzle pressure = 0.
(D)Nominal operation (top boiler power).
Conditions of use:Test conditions:
Maximum operating temperature: 100 °C CO² Fuel oil = 13%
Maximum operating pressure: 6 bar CO² Natural gas = 9.5%
Thermostat adjustable from 30 to 90°C Ambient temperature: 20 °C
Safety thermostat: 110 °C
Boiler GT 334 GT 335 GT 336 GT 337 GT 338 GT 339
Useful output kW 51-70 66-103 95-135 117-184 151-234 162-278
Power input kW 56-79 74-114 103-150 130-200 161-252 179-311
Water capacity l 96 116 136 156 176 196
Number of sections 456789
Losses when off - 50 °C (A) % 0.150 0.135 0.125 0.115 0.100 0.085
Number of baffle plates 6 1010101212
Water resistance
∆T = 10K (B) (D) mbar 10 17 29 44 68 105
∆T = 15K (B) (D) mbar 5 7 13 20 30 46
∆T = 20K (B) (D) mbar 3 4 7 11 17 26
Flue gas temperature (D) °C < 180 < 180 < 180 < 180 < 180 < 180
Pressure in the furnace for nozzle pressure = 0
(C) (D)
mbar
(C) 0.2 0.4 0.7 1.2 1.8 2.2
Mass flue gas flow rate (D)
DIN 4705 Teil 1
Fuel oil Kg/h 116 171 225 306 390 463
Natural gas Kg/h 122 180 236 321 409 486
Combustion chamber
Recorded
diameter mm 377 377 377 377 377 377
Length mm 621 781 941 1101 1261 1369
Volume m30.096 0.122 0.148 0.174 0.200 0.226
Maintenance consumption* ∆T = 30K % 0.150 0.135 0.125 0.115 0.100 0.085
Weight (empty) kg 612 736 846 981 1103 1230

9
10/04/06 - 300007650-001-A GT 330
2.3 Boilers for following countries: Germany, Poland
(A)1 mbar = 10 mmCE = 10 daPa.
(B)Pressure in the furnace for nozzle pressure = 0.
(C)Nominal operation (top boiler power).
Conditions of use:Test conditions:
Maximum operating temperature: 100 °C CO² Fuel oil = 13%
Maximum operating pressure: 6 bar CO² Natural gas = 9.5%
Thermostat adjustable from 30 to 90°C Ambient temperature: 20 °C
Safety thermostat: 110 °C
Boiler GT 334 GT 335 GT 336 GT 337 GT 338 GT 339
Useful output kW 55-80 80-110 110-140 140-175 175-210 210-250
Power input kW 60-88 88-121 121-154 154-192 192-231 231-275
Number of sections 456789
Number of baffle plates 6 1010101212
Water capacity l 96 116 136 156 176 196
Maintenance consumption (A) ∆T = 30K % 0.150 0.135 0.125 0.115 0.100 0.085
Water resistance
∆T = 10K (A+C) mbar 8.7 16.5 27 41.2 56.9 84
∆T = 20K (A+C) mbar 2.1 3.8 7 9.6 14.2 20.8
Flue gas temperature (C) °C < 180 < 180 < 180 < 180 < 180 < 180
Pressure in the furnace for nozzle pressure = 0
(B) (C)
Pa
(A) 20 35 60 100 150 200
Mass flue gas flow rate (C)
DIN 4705 Teil 1
Fuel oil kg per
sec 0.037 0.051 0.065 0.081 0.097 0.115
Natural gas kg per
sec 0.039 0.054 0.068 0.085 0.102 0.121
Combustion chamber
Recorded
diameter mm 377 377 377 377 377 377
Length mm 621 781 941 1101 1261 1369
Volume m30.096 0.122 0.148 0.174 0.200 0.226
Weight (empty) kg 612 736 846 981 1103 1230

10 GT 330 10/04/06 - 300007650-001-A
2.4 Boilers for EXPORT
In order for the boiler to operate correctly, it is imperative
to respect the draught at the nozzle: 0 at the nozzle.
(A)Loss when not operating in accordance with prevailing standard.
(B)1 mbar = 10 mmCE = 10 daPa.
(C)Pressure in the furnace for nozzle pressure = 0.
(D)Nominal operation (top boiler power).
Conditions of use:Test conditions:
Maximum operating temperature: 100 °C CO² Fuel oil = 13%
Maximum operating pressure: 6 bar CO² Natural gas = 9.5%
Thermostat adjustable from 30 to 90°C Ambient temperature: 20 °C
Safety thermostat: 110 °C
Boiler GT 334 GT 335 GT 336 GT 337 GT 338 GT 339
Useful output kW 70-105 105-140 140-180 180-230 230-280 280-330
Number of sections 45678 9
Water capacity l 96 116 136 156 176 196
Number of sections 45678 9
Losses when off - 50 °C (A) % 0.17 0.14 0.13 0.11 0.10 0.09
Number of baffle plates 610106 6 6
Water resistance ∆T = 15K (B) mbar 6.2 10.9 20.4 30 44.5 63.8
Flue gas temperature (D) °C 210 210 210 210 210 210
Pressure in the furnace for nozzle pressure = 0
(C) (D)
mbar
(B) 0.3 0.6 1.1 1.6 2.2 2.5
Mass flue gas flow rate (D) Fuel oil Kg/h 178 238 306 391 475 560
Natural gas Kg/h 187 250 321 410 499 588
Flue gas circuit volume (Flue
ways + Combustion chamber) m30.163 0.206 0.249 0.292 0.335 0.378
Combustion chamber
Recorded
diameter mm 377 377 377 377 377 377
Length mm 621 781 941 1101 1261 1369
Volume m30.096 0.122 0.148 0.174 0.200 0.226
Weight (empty) kg 612 736 846 981 1103 1230

11
10/04/06 - 300007650-001-A GT 330
3 Main dimensions - GT 330
(1) Adjustable feet: Basic dimension 0 mm, adjustment possible: 0 à
40 mm
Sludge removal hole Ø Rp 2 1/2 (plugged)
Rp 1 1/2 socket for the safety control unit
Heating outlet (Clamp + Counter flange with collar to be welded)
orifice Ø 2" 1/2 (*)
Heating return (Clamp + Counter flange with collar to be welded)
orifice Ø 2" 1/2 (*)
Rp 1 1/2 draining outlet (plugged)
(*) Ø 2" (optional)
Mk: Tapped connection
R: Thread
==
800
DA
L
P195 105
C
B
==
594103 103
98
1192
387
137
827
1017
137
Ø R
153
153
53
H
115
M000529
1
23
45
(1) (1)
Boiler GT... GT 334 GT 335 GT 336 GT 337 GT 338 GT 339
Standard panel
A 130 130 130 130 130 130
B 105 105 105 105 105 105
C 165 165 165 165 165 165
D 738 738 738 738 738 738
H 1297 1297 1297 1297 1297 1297
Table
K3
+ M3
+ B3
A 355 355 355 355 355 355
B 195 195 195 195 195 195
C 145 145 145 145 145 145
D 755 755 755 755 755 755
H 1387 1387 1387 1387 1387 1387
L (mm) 991 1151 1311 1471 1631 1791
P (mm) 490 650 810 970 1130 1290
R (mm) 180 180 180 200 200 200

12 GT 330 10/04/06 - 300007650-001-A
Position of the boiler
The dimensions (in mm) correspond to the minimum recommended
dimensions needed to ensure adequate accessibility around the
boiler.
Ventilation: 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.
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.
Warning:
In order to avoid damage to the boilers, 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.
B
,119m
1m
m1,5
A
0,5m 0,8m ,m05
M000530
0,1 m5
Boiler GT 334 GT 335 GT 336 GT 337 GT 338 GT 339
Size A mm 840 1000 1160 1320 1480 1640
B
Standard panel mm 105 105 105 105 105 105
Panel K3
B3
DIEMATIC-m3
mm 195 195 195 195 195 195

13
10/04/06 - 300007650-001-A GT 330
Hydraulic connections
1 Important recommendations on connecting the heating circuit to the boiler and the drinking water system
Installation must be carried out in accordance with the prevailing
regulations, the codes of practice and the recommendations in these
instructions.
The safety valve must be connected to the boiler outlet and no other
valve or flap must be interposed between it and the boiler.
Example of an installation:
The example of an installation shown below does not cover every
possible configuration. Its sole aim is to draw your attention to the
basic rules to be respected.
France: Heating installations must be designed and constructed in
such a way as to prevent the return of water from the heating circuit
and products put into it into the drinking water network located
upstream; the installation must not be in direct relation with the
drinking water network (Article 16-7 of the departmental health
Directive).
When these installations are fitted with a filling system connected to
the drinking water network, they comprise a CB disconnector
(disconnector for zones with non-controllable pressure differences)
which satisfy the functional requirements of the NF P 43-011
standard.
GT 330 boiler with domestic hot water production using an independent tank
1 Heating outlet
2Heating return
3 3 bar safety valve + manometer
5 Flow switch
6Air separator
7 Automatic bleed valve
9 Isolation valve
10 3-way mixing valve
11 Boiler pump
12 Sludge decanting pot (particularly recommended on older installations)
13 Flush valve
14 Water low safety pressure-sensitive switch
15 Recycling pump
16 Expansion chamber
17 Drain cock
18 Heating circuit filling (with disconnector depending on prevailing
regulations)
19 Water treatment if TH > 25°
20 Water meter
26 DHW load pump
27 Non-return valve
28 Domestic cold water inlet
29 Pressure reducer (if mains pressure 5.5 bar)
30 Sealed safety unit calibrated to 7 bar with indicator type discharge
31 Independent domestic hot water tanks
32 Domestic hot water loop pump (optional)
56 Domestic hot water circulation return loop
57 Domestic hot water outlet
8219N008C
92
14
12
17
11
27
9
56
32
9
10
1
9
57
9
27
26
15
9
17
18
919 20 9
17
16
13
3
79
7
30
28
9
29
27
9
31
56
9
9
9

14 GT 330 10/04/06 - 300007650-001-A
2 Important recommendations for connecting the boiler to the heating circuit
Installation must be carried out in accordance with the prevailing
regulations, the codes of practice and the recommendations in these
instructions.
`Minimum safety valve flowrate as a function of maximum boiler nominal output :
Minimum relieving capacity
Maximum gross boiler output
Example
Maximum boiler nominal output is 200 kW.
Minimum safety valve flowrate must be 1500 Kg/h
Water flow in the boiler :
The water flow in the boiler when the burner is operating must
correspond with the following formulae:
- Nominal water flow Qn = 0.86 Pn/20
- Minimum flow Qmin = 0.86 Pn/45 (this flow also corresponds with
the minimum recycle flow in the boiler)
- Maximum water flow Qmax = 0.86 Pn/5
Qn = flow in m3/h
Pn = Nominal output (full boiler output) in kW.
Operation in cascade
After stopping the burner:
- Timeout required before the order to close a butterfly valve: 3 min
- Switch a possible shunt pump (located between the boiler and a
butterfly valve) off via the end of run contact of the butterfly valve
Operation with 2-stage burner
- The water temperature in the boiler is maintained at 50°C or more ;
the first stage must be set to a minimum of 30% of the nominal
stage
- Operation at modulated low temperature (minimum outlet
temperature: 30°C) ; the first stage must be set to a minimum of
50% of the nominal stage
- Operation with modulating burner
- The water temperature in the boiler is maintained at 50°C or more:
the burner can modulate down to 30% of the nominal stage
- Operation at modulated low temperature (minimum outlet
temperature: 30°C) ; the burner can modulate down to 50% of the
nominal stage
3 Refilling the installation
Filling shall be performed with a low flow rate from a low point in the
boiler room in order to ensure that all the air in the boiler is bled from
the high point of the system.
Always stop the pump before filling.

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VERY IMPORTANT : Instructions for starting up the boiler
for the first time after the system is fully or partly drained :
If all the air is not bled naturally to an expansion vessel
which opens out onto the air, the system must include
manual bleeder valves, in addition to automatic bleeder
valves with the capability to bleed the system by
themselves when it is operating; the manual bleeder valves
are used to bleed all the high points of the system and to
make sure that the filled system is free of air before the
burner is turned on.
Do not add cold water suddenly into the boiler when it is
hot.
4 Sludge removal
A tapped Ø 1Rp 2 1/2 hole with a plug has been provided on the
bottom of the front of the boiler.. Fit a 1/4 turn valve (not supplied) on
the opening to remove the sludge.
Sludge removal leads to the draining of large quantities of water, so
remember to refill the system after the operation.
After this operation, go ahead and fill the installation.
Z(voir "Refilling the installation")
never replace a boiler in an existing system without carefully
rinsing the system first. Install a sludge decanting pot on the
return pipe, very close to the boiler.
Chimney connection
The high-performance features of modern boilers and their use in
specific conditions as a result of the advance in burner technology
(e.g. first-stage or low modulation range operation) lead to very low
flue gas temperatures (<160°C).
For this reason :
- Use flue gas pipes designed to enable the flow of condensates
which may result from such operating modes in order to prevent
damage to the chimney.
- Install a draining tee at the bottom of the chimney.
The use of a draught moderator is recommended as well.
- As a last resort (old, outside, badly insulated chimney), the baffle
plates in the 4 upper flue ways can be partially removed, resulting
in an insrease in the flue gas temperature
1Fluesize
France: Refer to applicable regulations while determining the size of
the flue.
Please note that GT 330 boilers have pressurised and tight furnaces
and that the pressure at the nozzle must not exceed 0 mbar, unless
special sealing precautions have been taken, for instance in order to
connect a static condenser/regenerator.
2 Connection to the flue gas pipe
The connection shall be removable, and offer minimum load losses,
i.e. it must be as short as possible with no sudden change in section.
Its diameter shall always be at least equal to that of the boiler outlet,
i.e.:
Ø 180 mm : for 4 to 6 sections
Ø 200 mm : for 7 to 9 sections
Fit a measuring point (Ø 10 mm hole) on the flue, in order to adjust
the burner (combustion check).

16 GT 330 10/04/06 - 300007650-001-A
Fuel-oil or gas connections
ZRefer to the instructions supplied with the burner.
The burner head deflector must be flush with the insulation
of the burner door.
A: Furnace door insulation
B: 4 markings on Ø 170
C : 4 markings on Ø 200
D: 4 markings on Ø 220

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10/04/06 - 300007650-001-A GT 330
Electrical connections
ZRefer to the connection instructions supplied with the control
panel.
Maintenance
1 Installation - Water level - Draining
Regularly check the level of water in the system and top up if
required, taking care that cold water is not added suddenly into the
boiler when it is hot.
This operation should be required only a few times in each heating
season, with very low quantities of water; otherwise, look for the leak
and repair it.
We advise you against draining the system unless it is absolutely
necessary.
2 Boiler
The boiler will only operate efficiently if the exchange
surfaces are kept clean
The boiler must be cleaned as often as necessary and, like the
chimney, at least once a year or more in accordance with the
prevailing regulations and the insurance contract taken out.
The operations described below shall only be performed
with the boiler and power supply off.
2.1 Cleaning the flue gas circuit
- Unhook the front panel.
- Open the cleaning door (top door) by unscrewing the 4 closing nuts
(17 mm spanner),
- Remove the baffle plates,
- Carefully sweep the four flue ways with the brush supplied for that
purpose,
- Also sweep the baffle plates and the front panel,
- If possible, use a vacuum cleaner,
- Replace the baffle plates,
- Close the door.
0M00 531

18 GT 330 10/04/06 - 300007650-001-A
2.2 Cleaning the combustion chamber
- Unscrew the 4 closing nuts and open the furnace door
- Brush out the inside of the furnace
- Use a vacuum cleaner to remove any soot which has accumulated
in the combustion chamber
- Close the door and replace the front panel.
2.3 Positioning of the baffle plates
The first two baffle plates in the 2 lower flue ways are fitted
with stops allowing them to be positioned in the required
emplacement.
(1) Stop
0M00 532

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10/04/06 - 300007650-001-A GT 330
Boilers for following countries: France, Germany, Belgium, Switzerland, Spain, Austria, Poland, Slovenia,
Czech Republic
Boilers for following countries: Canada, China, Greece, Romania, Tunisia, United States, Russia
2.4 Cleaning the flue gas box
- Remove the left and right cleaning hatches from the flue gas box
(2 butterfly nuts) and use a vacuum cleaner to remove any soot
which has accumulated
- Replace the cleaning hatches.
2.5 Maintenance of the burner
ZRefer to the instructions supplied with the burner
3 Precautions required in the case of long boiler stops (one or more years)
- The boiler and the chimney must be swept carefully.
- Close all the doors of the boiler to prevent air from circulating inside
the boiler.
- We advise removing the pipe which connects the boiler to the
chimney and to close off the nozzle with a cover.
4 Precautions required if the heating is stopped when there is a risk of freezing
We recommend the use of a correctly dosed antifreeze agent to
prevent to the heating circuit from freezing.
If this cannot be done, drain the system completely.
Baffles Flue ways GT 334 GT 335 GT 336 GT 337 GT 338 GT 339
Upper - Ig 410 mm A + B 8 8 4
- Ig 570 mm A + B 4 4 8 8
Lower - Ig 412 mm C 222242
- Ig 572 mm C 2
Baffles Flue ways GT 334 GT 335 GT 336 GT 337 GT 338 GT 339
Upper - Ig 410 mm A+B 88000
- Ig 570 mm A + B 4 4 4 4
Lower - Ig 412 mm C 222222
M 533000

20 GT 330 10/04/06 - 300007650-001-A
Identification plate
The identification plate fixed on the side of the boiler during
installation is used to identify the boiler correctly and also provides
the main specifications of the boiler.
: Boiler type
: Date of manufacture
: Year of manufacture
: Week of manufacture
: Serial no. of the appliance
M000534
671 ND
RBRO
F10
IE ENN