VSX4 and VSX8 Series Controller
!
Warning
Failure to follow these instructions or to
properly install and maintain this equipment
could result in an explosion and/or fire
causing property damage and personal
injury or death.
Fisher™ controller must be installed, operated
and maintained in accordance with federal,
state and local codes, rules and regulations
and Emerson Process Management regulator
Technologies, inc. (Emerson) instructions.
Only a qualified person must install or
service the VSX4 and VSX8 Series controller.
if a leak develops or if the controller
continually vents gas, service to the unit may
be required. Failure to correct trouble could
result in a hazardous condition.
installation, operation and maintenance
procedures performed by unqualified
personnel may result in improper adjustment
and unsafe operations which may result in
equipment damage or personal injury.
The VSX4 and VSX8 Series controller do
not activate in response to fire, seismic and
lightning events.
Figure 1.
VSX4 and VSX8 Series Controller
introduction
Scope of the Manual
This Instruction Manual provides installation, adjustment,
maintenance and parts ordering information for the VSX4
and VSX8 Series controller. Instructions for other equipment
used with the controller, such as pressure regulators, can be
found in separate instruction manuals.
Table of Contents
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Principle of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Reed Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Startup and Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Controller Spring Adjustment . . . . . . . . . . . . . . . . . . . . . . . . 8
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Parts Ordering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
VSX4 and VSX8 Series
Instruction Manual
D103127X012
May 2018
