8
SETTINGS
Gas settings
WARNING!
THE SEALED SCREWS MUST NOT BE UNLOOSED!
IN A SUCH CASE THE DEVICE WARRANTY IS IMMEDIATELY INVALIDATE!
Fig. 8 - Multibloc MB-DLE - VPS504
The multibloc unit is a compact unit consisting of two valves, gas
pressure switch, pressure stabilizer and gas filter. It can be paired
jointly to the Dungs VPS504 sealing controls.
The valve is adjusted by means of the RP regulator after slacke-
ning the locking screw VB by a number of turns. By unscrewing the
regulator RP the valve opens, screwing the valve closes.
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 loca-
ted 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 replace-
mente of the coil.
Leakage control device VPS504 (Optional)
The VPS504 check the operation of the seal of the gas shut off val-
ves costituting the MB-DLE. 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. When wishing to
monitor the test, install a pressure gauge ranged to that of the pres-
sure supply point PA. 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 illu-
minated pushbutton LB.
.
Fig. 8
C
VS T(VR)
RP
LC
LB
PA
VB
VSB
