Instruction Manual
D200158X012
4194S Controllers
July 2018
7
Section 2 Installation
22-2-
The controllers should be mounted with the housing vertical (as shown in figure 2-1) so that the vent points down.
WARNING
To avoid personal injury or property damage from sudden release of process pressure:
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Always wear protective clothing, gloves, and eyewear when performing installation and maintenance procedures.
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Personal injury or property damage may result from fire or explosion if natural gas is used as the supply medium and
preventive measures are not taken. Preventive measures may include, but are not limited to, one or more of the
following: Remote venting of the unit, re‐evaluating the hazardous area classification, ensuring adequate ventilation,
and the removal of any ignition sources. For information on remote venting of this controller, refer to page 10.
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Check with your process or safety engineer for any additional measures that must be taken to protect against process
media.
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If installing into an existing application, also refer to the WARNING at the beginning of the Maintenance section in this
instruction manual.
CAUTION
Do not use sealing tape on pneumatic connections. This instrument contains small passages that may become obstructed
by detached sealing tape. Thread sealant paste should be used to seal and lubricate pneumatic threaded connections.
Actuator Mounting
Refer to figure 2-1. Controllers specified for mounting on a control valve actuator will be mounted at the factory. If the
controller is ordered separately for installation on a control valve actuator, mount the unit as described in this section.
Mounting parts vary for different actuator types.
Attach the mounting bracket to the actuator yoke with cap screws, lock washers, and spacer spools. Attach the
controller to the bracket with cap screws, lock washers, and spacer spools. On some designs, the mounting bracket is
attached to the actuator casing rather than to the yoke.
Panel Mounting
Refer to figure 2-2. Cut a hole in the panel surface using the dimensions shown in figure 2-2. Slide the controller into
the hole and attach the bracket (key 68) to the rear of the controller using three cap screws (key 66) and lock washers
(key 67). Tighten the screws (key 70) to draw the case snugly and evenly to the panel surface.
Wall Mounting
Refer to figure 2-3. Drill holes in the wall (using the dimensions in figure 2-3) to align with the four holes in the bracket
(key 68). If the process tubing is to run through the wall, drill a hole in the wall large enough to accept the tubing.
Mount the controller to the bracket using three cap screws (key 66) and lock washers (key 67). Attach the bracket to
the wall, using suitable screws or bolts.
Pipestand Mounting
Refer to figure 2-4. Pipestand mounting parts are provided to mount the controller to an NPS 2 (nominal) pipe. Attach
a bracket (key 68) to the controller with cap screws (key 66) and lock washers (key 67). Attach two clamps (key 69) to
the bracket, and fasten the controller to the pipe.
