Asco JOUCOMATIC 343 Serie Puesta En Marcha Y Mantenimiento página 14

ADJUSTMENT OF DOWNSTREAM PRESSURE BUILD-UP TIME
GB
In both soft-start device versions, the filling rate, i.e. the pressure build-up in the downstream circuit, is adjusted by means of a
fine-thread screw. Components are supplied with the screw fully in (closed position, zero flow).
Adjustment is as follows:
- Unscrew the screw by 0.5 to 6 turns to obtain the desired filling speed (Fig. 2).
- Perform a test.
- Regulate the setting by adjusting the screw. Before retesting, vent the installation with the shut-off valve.
- When the correct setting is obtained, insert the pin to lock the screw and prevent unauthorised adjustment of regulated
pressure (see Fig. 3). To change the adjustment, it is necessary to remove the upper cover and withdraw the pin (Modulair 112).
Note: With a solenoid/air controlled soft-start device, the adjustment must be made with the electrical pilot installed (see Fig. 2).
To fit the locking pin, it is necessary to vent the installation and remove then reinstall the pilot (see Fig. 3 and 4).
Version with automatic
soft-start device
1
Fig. 3
MODULAIR 112
Fig. 2
Fig. 3
MODULAIR 107
Fig. 2
3
2
1
2
Version with solenoid/air controlled
soft-start device
2
MODULAIR 112
1
Fig. 1
4
5
Fig. 3
14
3
Fig. 2
6
Fig. 4