Honeywell HON 5020 User And Maintenance Manual page 48

Protecting the pipe con-
nections from being
twisted
Removing
components
HON 5020 gas pressure regulator with HON 640a / HON 642a pilot
When conducting work involving the pipework, please always observe the following:
Figure
If ...
You want to perform maintenance on the pilot
only
You want to perform maintenance on the actua-
tor assembly only
You want to perform maintenance on both the
actuator assembly and the pilot
To remove the pilot, follow the steps below:
Figure
Description
Do not twist the pipe connections in the assemblies.
Use a second spanner wrench for securing when
loosening and tightening pipe joints.
then ...
 The pilot needs to be removed from the
actuator assembly.
 The actuator assembly, including the pipes, can
remain in the gas regulating line.
 The motorization line between the pilot and
the actuator assembly needs to be removed.
 The actuator assembly can remain in the gas
regulating line.
 The pilot, including the remaining pipes (with
the exception of the motorization line), can
remain in the gas regulating line.
 The pilot needs to be removed from the
actuator assembly.
 The motorization line between the pilot and
the actuator assembly needs to be removed.
 The actuator assembly, including the remaining
pipes (with the exception of the motorization
line), can remain in the gas regulating line.
Step Description
1 Remove all the pilot pipes.
2 Disassemble the pilot.
Maintenance
48