C.I.B. UNIGAS
- M03956CR
17
Keys
1 spring
2 cap
DUNGS MBC valves:
Siemens VGD valves with SKP actuator
:
Gas Proving System VPS504
The VPS504 check the operation of the seal of the gas shut off valves. This check, carried out as soon as the boiler thermostat gives a
start signal to the burner, creates, by means of the diaphragm pump inside it, a pressure in the test space of 20 mbar higher than the
supply pressure.
To install the DUNGS VPS504 gas proving system on the MD-DLE valves group, proceed as follows:
1
turn off gas supply.;
2
Switch off power supply.
3
remove the Multibloc screw plugs (Fig. 17-A);
4
iInsert sealing rings (10,5 x 2,25) into VPS 504 (Fig. 17-B - Fig. 18)
5
Torque screws 3, 4, 5, 6 (M4 x16) Fig. 18-C
Only use screws with metric thread on reassembly (modification, repair).
6
On completion of work, perform a leak and functional test.
When wishing to monitor the test, install a pressure gauge ranged to that of the pressure supply point
PA
(Fig. 18). If the test cycle is
satisfactory, after a few seconds the consent light
LC
(yellow) comes on. In the opposite case the lockout light
LB
(red) comes on. To
restart it is necessary to reset the appliance by pressing the illuminated pushbutton
LB
.
DUNGS MBC..SE
Siemens SKP actuator
Performance range
(mbar)
4 - 20
20 - 40
40 - 80
80 - 150
Spring colour
-
red
black
green
Performance range (mbar)
0 - 22
15 - 120
100 - 250
Spring colour
neutral
yellow
red
Fig. 17
Fig. 18
1
2
2
1
A
B
LC
LB
PA
C
