Honeywell HON 512 User And Maintenance Manual page 142

HON 512 with HON 650 pilot user manual
Proceed as follows:
Step Description
1 Prepare an appropriate test setup that will ensure that the gas pressure regulator can be
tested for leaks with a bubble-tight sealing unit and pressure measurements at the actua-
tor assembly's gas inlet and outlet sides.
2 Install the gas pressure regulator in the test setup. Proceed as indicated in the topics; see
page 43.
3 Seal off the pilot connections that are not connected to the actuator assembly. These
connections include:
▪ Port for outlet pressure sensing line
▪ Outlet pressure bleed line / return line fitting
▪ Vent line connection
4 Pressurize the gas pressure regulator from the inlet side with 1.1 times the operating
pressure (MOP).
5 Apply the test medium to all detachable pipe joints and fittings on the pilot and on the
actuator assembly. Also add test medium to the amplifying valve on the pilot.
6 Monitor the pressure at the gas outlet side.
7 Observe the test medium on all detachable pipe joints for several minutes.
If ...
No foam or bubbles are formed and no pressure
builds up at the bubble-tight sealing unit on the
gas inlet side
foam or bubbles are formed
The pressure at the bubble-tight sealing unit at
the gas outlet side rises
Step Description
8 Establish a depressurized status. Residual amounts of energy must be depressurized as
well.
9 Seal the leaking pipe joints.
10 Disassemble the gas pressure regulator as indicated in the Maintenance (see page 65)
section.
11 Check all spare parts to make sure they are in good condition.
Replace any damaged or questionable spare parts.
12 Properly reassemble the gas pressure regulator as indicated in the Maintenance (see page
65) section.
13 Repeat the leak test starting with step 2.
then ...
▪ The gas pressure regulator has no leaks.
▪ The gas pressure regulator can be installed back
in the gas regulating line.
▪ Proceed with one of the next activities.
▪ The gas pressure regulator has leaks.
▪ The gas pressure regulator must NOT be
installed again and must NOT be put into oper-
ation.
▪ Proceed with the following steps: 8, 9 and 13.
▪ The gas pressure regulator must NOT be
installed again and must NOT be put into oper-
ation.
▪ Proceed with the following steps: 8, 10, 11, 12
and 13.
Maintenance
142