Unigas E115X Installation Manual page 35

ADJUSTING THE GAS VALVES GROUP
Multibloc MB-DLE
The multibloc unit is a compact unit consisting of two valves, gas pressure switch, pressure
stabilizer and gas filter.
The valve is adjusted by means of the RP regulator after slackening the locking screw VB by
a number of turns. By unscrewing the regulator RP the valve opens, screwing the valve clo-
ses. To set the fast opening remove cover T, reverse it upside down and use it as a tool to
rotate screw VR. Clockwise rotation reduces start flow rate, anticlockwise rotation increases
it.
Do not use a screwdriver on the screw VR!
The pressure stabilizer is adjusted by operating the screw VS located under the cover C. By
screwing down the pressure is increased and by unscrewing it is reduced.
Note: the screw VSB must be removed only in case of replacemente of the coil.
MultiBloc MBE Regulation VD-R whith PS
Caution: check that the range of the installed spring is compatible with the gas pressure at the burner head (see
appropriate diagram) to which must be added the back pressure and approx. 5 /10 mbar for various leaks and gas line.
While making outlet pressure adjustments, do not exceed a value that creates a hazardous condition to the bur-
ner!
Siemens VGD../VRD.. version with SKP2
T
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 follows:i
To increase or decrease gas pressure, and therefore gas flow rate, remove the cap T and use a screwdriver to adjust the regulating
screw VR. Turn clockwise to increase the flow rate, counterclockwise to reduce it.
PART IV: OPERATION
Outlet
pressure
PS-10/40
PS-50/200
VR
+
-
MIN 10%
4 mbar 10 mbar 25 mbar
0,4 kPa 1,0 kPa 2,5 kPa
2 "w.c. 4 "w.c. 10 "w.c.
20 mbar 50 mbar 125 mbar
2,0 kPa 5,0 kPa 12,5 kPa
8 "w.c. 20 "w.c. 50 "w.c.
Performance range (mbar)
Spring colour SKP 25.0
Spring colour SKP 25.4
35
C VS
T(V
V
R
25% 50% 75%
50 mbar 75 mbar
5,0 kPa 7,5 kPa
20 "w.c. 30 "w.c.
250 mbar 375 mbar
25,0 kPa 37,5 kPa
100 "w.c. 150 "w.c.
neutral yellow
0 ÷ 22 15 ÷ 120
7 ÷ 700
VSB
MAX
100 mbar
10,0 kPa
40 "w.c.
500 mbar
50,0 kPa
200 "w.c.
red
100 ÷ 250
150 ÷ 1500