Honeywell HON 512 User And Maintenance Manual page 52

Checking the system for
leaks
HON 512 with HON 650 pilot user manual
Proceed as follows:
Step Description
1 Close the outlet valve.
2 Slowly pressurize the inlet chamber with 1.1 times the operating pressure (MOP). Details
about the operating pressure can be found in the technical specifications (see page 22).
3 Wait for the following to occur:
▪ The actuator assembly will open first. You can observe this by monitoring the visual
position indicator.
▪ The actuator assembly will close once the reseat pressure is reached. You can observe
this by monitoring the visual position indicator.
4 Check whether the maximum permissible setpoint for the gas pressure regulator is
reached and maintained in the outlet chamber.
If ...
The maximum permissible setpoint for the gas
pressure regulator is reached and maintained in
the outlet chamber
The maximum permissible setpoint for the gas
pressure regulator is not reached or maintained in
the outlet chamber
Step Description
5 Apply the test medium to all detachable pipe joints.
6 Observe the test medium on all detachable pipe joints for several minutes.
If ...
no foam or bubbles are formed
foam or bubbles are formed
Step Description
7 Close the inlet shut-off device (the outlet shut-off device should still be closed).
8 Depressurize the area between the inlet and outlet shut-off devices by first opening the
shut-off device for the blowdown lines (7) in the outlet chamber and then the shut-off
device for the blowdown lines (4) in the inlet chamber.
9 Seal the leaking pipe joints.
10 Close the blowdown lines' shut-off devices.
11 Repeat the leak test starting with step 1.
Transport, installation and start-up
then ...
proceed with step 5.
▪ Adjust the setpoints for the load limiting stage
and control stage on the pilot as specified in
Adjusting the settings of the device (see page
55).
▪ Proceed with step 4.
then ...
▪ the system is leak-proof.
▪ the system may be put into operation.
▪ the affected pipe joint is leaking.
▪ the system may NOT be put into operation.
▪ Proceed with step 7.
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