Specifications; Installation; Attaching Vertical Displacer; Attaching Horizonal Displacer - Emerson Fisher l2 Instruction Manual

Instruction Manual
Form 5732
December 2001
These low-bleed controllers use a single four-mode
relay to provide the applicable control and action.
The device delivers a pneumatic output signal to a
control valve.

Specifications

Specifications for the controller and sensor are listed
in table 1.

Installation

WARNING
To avoid personal injury or property
damage caused by the sudden release
of process fluid, be certain the service
conditions do not exceed the sensor
pressure limits. Use pressure-limiting
or pressure-relieving devices to
prevent service conditions from
exceeding these limits.
CAUTION
If the Type L2 level controller is
installed on a vessel that is to be
shipped to a different location (e.g.
skid mounted units), remove the
displacer and displacer rod extensions
before shipment. Failure to do so
could result in damage to the displacer
rod due to vibration and impact
loading during shipment. After the
vessel is installed at its final location,
reassemble the displacer and
displacer rod extension.
1. Be sure there are no obstructions inside the tank
that will interfere with displacer installation or
operation.
2. Provide the appropriate connection in the tank
wall to match the sensor connection. Locate the tank
wall connection such that the displacer will be at the
desired control level.
3. If necessary, reinforce the tank connection so that it
will be capable of supporting the sensor and controller.
Attaching a Vertical Displacer
Refer to figure 7 for part locations.
CORRECT CONTROLLER MOUNTING
HOLE ORIENTATION WHEN
MOUNTED ON VESSEL
A6639 / IL
Figure 2. Sensor Orientation
1. Thread jam nut (key 68) all the way onto the
threaded portion of the universal joint assembly (key
69).
2. Thread the displacer (key 81) all the way onto the
threaded portion of the universal joint assembly.
3. Tighten the jam nut (key 63) against the displacer
(key 81).
Attaching a Horizontal Displacer
Refer to figure 7 for part locations.
1. Thread the displacer (key 81) all the way onto the
displacer rod (key 64) or extension (key 82).
2. Tighten the jam nut (key 63) against the displacer
(key 81).
Attaching the Sensor to the Vessel
Insert the displacer end of the controller-sensor
assembly into the tank connection, and screw the
sensor threads into the tank connection. Tighten
sufficiently to seal the threads. If necessary, loosen
or tighten slightly to obtain the orientation shown in
figure 2. Make sure that the controller case is level.
CAUTION
Do not pick up the controller/sensor by
lifting the displacer rod (key 64). This
action could place excessive stress on
the displacer rod and cause the unit to
malfunction.
Type L2
3