Unigas HTLX 1025.1, Installation Manual

Page: 15 / 116

PART I: INSTALLATION MANUAL
15
version with SKP2 (built-in pressure stabilizer)
Siemens VGD SKPx5 (Auxiliary-optional micro switch)
Gas valveGas Filter (if provided)
The gas filters remove the dust particles that are present in the gas, and prevent the elements at risk (e.g.: burner valves, counters and
regulators) from becoming rapidly blocked. The filter is normally installed upstream from all the control and on-off devices.
Once the train is installed, connect the gas valves group and pressure switches plugs.
ATTENTION: it is reccomended to install the filter with gas flow parallel to the floor in order to prevent dust fall on
the safety valve during maintenance operation.
SA
SA
TP
D
= BS
SKP1. SKP2.
*
* *
*
*
*
*
*
*
SIEMENS VGD..
Mounting positions
T
VR
Performance range (mbar)
neutral yellow red
Spring colour SKP 25.0 0 ÷ 22 15 ÷ 120 100 ÷ 250
Spring colour SKP 25.4 7 ÷ 700 150 ÷ 1500
Siemens VGD valves with SKP actuator:
The pressure adjusting range, upstream the gas valves group,
changes according to the spring provided with the valve group.
To replace the spring supplied with the valve group, proceed as fol-
lows:
- Remove the cap (T)
- Unscrew the adjusting screw (VR) with a screwdriver
- Replace the spring
Stick the adhesive label for spring identification on the type plate.
N L 1
2
3
1
2
3
Valve drive
Plug connection
End of stroke
Plug connection
Actuator connection
A Valve closed
(only with SKPxx.xx1xx)