Murphy LS200N - Manual (Page 8)

Section 15 00-02-0563
01-11-06 - 4 -
Pressure Vessel Installation: LS200, LS200N and L1100
Direct Installation into the Wall of the Pressure Vessel
1. Determine that the float travel is not obstructed by the coupling in
the vessel wall, internal baffles, etc. Do NOT use more than one
float shaft extension P/N 15000478.
2. Make certain the float and extension are tight.
3. Before installing the level switch, use of a pipe thread sealant is
recommended. Screw the unit directly into the threaded
connection in the wall of the pressure vessel.
4. For LS200 and L1100, verify that the electrical connection is
positioned at the bottom.
5. For LS200N the 1/8” NPT pneumatic connection should be on
top (the 3/8” NPT vent connection should be on the bottom) for
service on a “Trip on Rising” application. The LS200N can be
modified for service on a “Trip on Falling” application.
6. Make the electrical wiring connections according to appropriate wiring diagrams for
the alarm or shutdown system to be used. The electrical connection is 1/2”-14 NPT.
7. Ensure all electrical connections are insulated and the cover is fully installed before
reconnecting electrical power.
8. Verify all pressure connections are tight before pressurizing the system.
Installation with a Weld Collar
1. The weld collar, P/N 15050375, must be welded into the wall of
the pressure vessel according to code standards and good
welding practices.
2. Follow above instructions for installation directly into the wall of
the pressure vessel.
NOTE: Weld collar 15050375 can be used ONLY with
model LS200.