TECHNICAL MANUAL MT103
31
In installations consisting of two lines, we suggest commissioning one line at a time, starting from the one with
the lower set-point, known as the “reserve” line.
The set-points of the apparatuses in this line will obviously
deviate from those specified in the tables 8 and 9.
Before commissioning the regulator you must check that all the on/off valves (inlet, outlet, any by-pass) are
closed and that the gas is at a temperature which will not lead to malfunction.
Fig. 19...Pilot adjustment screw
5.3
COMMISSIONING THE REGULATOR WITH INCORPORATED SB/82 SLAM-SHUT (FIG. 20)
If there is also a relief valve in the line, refer to par. 3.1 to check it.
Fig. 20
Check and adjust the intervention of the slam-shut 7 as follows:
A) For slam-shuts connected to the downstream piping by a three-way deviator push valve 11, proceed as follows (fig. 21):
- connect a controlled auxiliary pressure to path C;
- stabilise this pressure at the set-point established for the regulator;
- insert the reference pin 2 in the notch, pressing the knob 1 completely;
- reset the slam-shut device by means of the provided lever;
- keep the knob 1 pressed:
•)for safety devices which intervention for maximum pressure: slowly increase the auxiliary pressure and check
the intervention value. If necessary, increase the intervention value by turning the adjustment ring 14
clockwise, or anticlockwise to reduce the intervention value.
•
)for safety devices for pressure increase and reduction: slowly increase the auxiliary pressure and record the
intervention value. Restore the pressure to the set-point established for the regulator, and carry out the
slam-shut reset operation. Check intervention for pressure reduction by slowly reducing the auxiliary
pressure. If necessary increase the intervention values for pressure increase or decrease by respectively
turning the rings 14 or 15 clockwise and vice versa to reduce the intervention values.
- check proper operation by repeating the operations at least 2-3 times.
| [email protected] | Phone: 877.566.3837 | Fax: 925.407.2903
