Instruction Manual
D200119X012
2100 and 2100E Liquid Level Switches
June 2017
7
Refer to figure 5 except as noted.
1. Connect a supply pressure line to the 1/4 NPT internal connection located in the back plate (key 10).
2. Install an output line between the supply pressure line and the equipment to be operated by the switch.
3. Install a street tee and bleed orifice (keys 34 and 35, figure 3) or other fixed restriction in the supply pressure line
between the supply source and the output signal line.
Figure 3. Detail of Optional Street Tee and Bleed Orifice
A3619‐1
1/4 NPT
OUTPUT PRESSURE
CONNECTION
1/4 NPT SUPPLY PRESSURE
CONNECTION
BACK PLATE (KEY 10)
STREET TEE
(KEY 34)
BLEED ORIFICE (KEY 35)
4. If a remote vent is required, remove the vent assembly (key 23) from the 1/4 NPT internal vent connection and
install a vent line to an area where the operating medium can be safely exhausted.
Note
The vent line should have as large a diameter as possible with a minimum number of bends and elbows. The vent line should be as
short as possible. Protect the end of the vent pipe from the entrance of rain, snow, insects, or any other foreign material that may
plug the vent line. Inspect the vent line opening periodically to ensure that it is not plugged.
If necessary to change to a different supply pressure, install a different nozzle according to steps 1 through 4 and 15
through 18 of the 2100 switch maintenance procedure.
To change switch action from low‐level to high‐level switching or vice versa, reverse the positions of the nozzle,
flapper, and magnet according to steps 1 through 7 and 10 through 18 of the 2100 switch maintenance procedure.
To change switch mounting from right‐hand to left‐hand or vice versa, perform steps 1 through 7 and 9 through 18 of
the 2100 switch maintenance procedure.
Additional Procedures for 2100E Switch
Refer to figure 6.
To install for standard action, connect electrical wires as shown in table 2.
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