Unigas G225X, Manual Of Installation - Use - Maintenance

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PART II: INSTALLATION
16
MultiBloc MBE
Threaded train with MultiBloc MBE - Mounting
Mounting VD-R & PS-...
Siemens VGD20.. e VGD40..
Siemens VGD20.. and VGD40.. gas valves - with SKP2.. (pressure governor)
ATTENTION: once the gas train is mounted according, the gas proving test mus be performed, according to the
procedure set by the laws in force.
ATTENTION: it is recommended to mount filter and gas valves to avoid that extraneous material drops inside the
valves, during maintenance and cleaning operation of the filters (both the filters outside the valves group and the
ones built-in the gas valves).
WARNING: Slowly open the fuel cock to avoid breaking the pressure regulator.
Attention: In the case of the MBE... valve, a pressure limit switch downstream of the safety valve is mandatory.
1. Gas pressure regulation is possible with VD-R and PS pressure sensor only. WARNING! For US/CN installation, the
output pressure must be monitoried by min. and max. pressure switches set to +/- 20% of the setpoint.
2. Mounting on pipe. Sensor position: 5x DN according to MBE. Pipe fitting with female thread size ¼, mount sensor with
seal, observe torque.
3. The pressure sensor includes a vent limiter according to UL 353 and ANSI Z21.18/CSA 6.3. No venting required in loca-
tions where vent limiters are accepted by the jurisdiction.
4. Only PS pressure sensors specified by DUNGS are authorised to be connected to the VD-R‘s M12 interface.
5. Only PS cables specified by DUNGS are authorised to be used to connect the PS to the VD-R. Max. cable length 3 m.
GAS BRUCIATORE ø185
501939
PGMAX
PGCP
PGMI
EV1
EV2
S
EV2
EV1
PGMAX
PGMIN
VD-R
PGCP
VD-V
VD-V
VD-R
PS
PS pressure sensor
Gas filter
Example of gas train MBE
Actuator VD-R

The actuator VD-V does not need any adjustment (funzione ON-OFF)

The actuator VD-R It must be combined with the PS sensor (include
regolatore di pressione)

The PS sensor chosen based on the necessary pressure (there are
3 models)
Actuator VD-V
M12 x 5
VD-R + PS