Murphy LS200 사용자 설명서

4 - 

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. 

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.