5
54-610 Thermatel
®
Model TD1/TD2 Flow Level Switch
2.3
Mounting
Thermatel
®
Flow/Level Switches are shipped assembled to
the sensor. Units may be mounted in any position or ori-
entation. Refer to Figures 1 and 2.
THERMATEL Flow/Level Switches should be located to
allow easy access for service. During operation the electronics
should not be exposed to ambient temperature above
+158 °F (+70 °C) or below -40 °F (-40 °C). Special pre-
caution should be taken to prevent exposure to corrosive
atmosphere, excessive vibration, shock or physical damage.
The switch can be exposed to storage temperature of
-58 °F (-50 °C).
NOTE: All wiring, conduit and electrical fittings must conform to local
electrical codes for the location selected.
The THERMATEL Flow/Level Switch has a standard
3
⁄
4
" NPT mount designed for easy installation through a
threaded connection. Optional threaded and flanged con-
nections are also available.
1. Apply thread sealant to the sensor and insert the sensor
into the threaded connection.
Caution:
Tighten unit only at the wrench flats on the sensor using
an open-end wrench. DO NOT use the instrument head
to tighten the switch to the mounting port. Rotation of
the instrument head with respect to the sensor assembly
can cause internal wiring damage.
2. Make sure the sensor is properly oriented to the flow (refer
to Figures 3 and 4) or level (refer to Figure 5).
Caution:
The switch body must be oriented so that the flow arrow
is in the direction of the flow/level being detected. Proper
orientation is marked on the wrench flats or on the top of
the flange for reference.
3. For flow switches calibrated by MAGNETROL, install the
probe near the centerline of the pipe. If not calibrated by
MAGNETROL, install the probe at least
1
⁄
4
diameter depth
into the pipe. For best results it is recommended to install
the switch with five diameters of straight run upstream
and downstream of the sensor.
Figure 1
Mounting
Figure 2
Mounting
Direction of
Level Movement
Figure 5
Level
Figure 4
Low Flow Body
Direction
of Flow
Direction
of Flow
Figure 3
Tee Connection
