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EN
GAS LINE
CONNECTION DIAGRAM FOR BURNERS WITH SEPARATE PILOT (GAS TRAIN VGD SIEMENS)
To be supplied by the installer
141
143
Gas
To be supplied by the installer
Double gas valves with actuators and regulator VGD Siemens and min pressure switch + ACS gas filter
VGD 20.503 Rp 2" / VGD 40.065 - 40.080 - 40.100 - 40.125 - 40.150
1
2
3
!
* EN676 CONFIGURATION: for gas train VCS include gas governor and filter and for VGD include filter.
KITTC-... Tightness control device (VPS - VDK - LDU) must be included over 1200 kW according to EN676.
!
** WARNING: from BLU 1700.1 - MULTICALOR 170.1 - MULTIFLAM 300.1, in order to fit the gas train, the
corresponding connection pipe must be ordered (GTCP size and fitting depend on the burner and the gas train selected).
!
NOTE: use should only be made of gas trains made by the burner manufacturer and approved in accordance with the burner test specifications.
EN676 compulsory kit and accessories in order to comply to the safety regulations.
Additional accessories and kits shall be installed by the installer in accordance to the local safety regulations and codes of practise.
Gas valves and instruments group
The gas valves and instruments group
used with the furnace will be selected
according to the specific requirements to
be met by a burner system.
The following factors must be taken into
account:
• burner output
• furnace back pressure
• gas pressure loss of the burner head
• gas pressure losses of the gas valves
and instruments group
WARNING: the total gas pressure loss
must always be smaller than the
available gas flow pressure.
12
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107
155
160
170
313
144
142
151
Air
7
6
9
5
8
11
10
Venting
Prior to taking the burner into operation or
after any repair work make sure to vent the
complete gas feed line and the gas valves
and instruments group into the open
atmosphere (e.g. by means of a hose)
taking care to avoid any hazards. In no
case should the gas line be vented into the
heating or furnace chambers. Make use of
a test burner to check the gas-carrying
spaces are free from an inflammable gas
mixture.
Support
The valves and instruments group must be
supported with a telescopic jacking
member or similar during and after
installation (e.g. on filter and valve).
100
Burner
143 Antivibration coupling
107
Pilot gas filter/governor
144 Gas governor
150 Batterfly valve
120
Air damper
151 Gas train Landis VGD....
141
Ball valve
155 Pilot gas train
142
Gas filter
160 Kit tightness control (optional)
143
Antivibration coupling
170 Kit tightness control for pilot gas valve (optional)
144
Gas governor
313 Min.gas pressure switch
150
Batterfly valve
314 Max.gas pressure switch (optional)
349 Air/gas damper motor
314
100
150
120
M
349
1. Main gas pipe
2. Ball valve
3. Antivibration coupling
5. Min gas pressure switch
6. Safety gas valve + 10. Actuator
7. Working gas valve + 11. Actuator
8. Gas leakage control
9. Gas filter
KIT - MAX Gas pressure switch
ACS - Gas train connection pipe
151
Gas train Siemens VGD....
155
Pilot gas train
160
Kit tightness control (optional)
170
Kit tightness control for pilot gas
valve (optional)
313
Min.gas pressure switch
314
Max.gas pressure switch (optional)
349
Air/gas damper motor
GAS TRAIN
KITTC *
Joint
It is recommended to provide an easyto-
disconnect joint (with planar sealing faces)
to facilitate repair work on the boiler
(furnace) and allow the boiler door to be
swivelled out if required.
LEGENDA
Pf: Back pressure of furnace
Pb: Pressure of burner (combustion head
+ complete gas train)
Pin: Minimum inlet pressure
420010436303
ACS
ACS
ACS
KITPRES
GTCP **
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