100P Enclosure 7 Adjustable Pressure Switch
Page 5
CAUTION
WARNING
NOTE
Make sure that the unit and your system have matching threads.
Use the wrench flats provided.
Seal all joints with pipe joint sealing compound.
Avoid excessive torque on all threaded connections.
Do not exceed the marked Maximum Operating Pressure in
normal operation.
The marked Proof Pressure is provided to give the maximum
allowable pressure without causing permanent damage to the
pressure switch in the event of an over-pressure condition. Set
pressure relief/safety valves below this setting.
ELECTRICAL CONNECTIONS
One terminal block is located on the inside of the unit.
Electrical connections are made through either of the two
¾”-14 NPT conduit openings. Model 100P Enclosure 7 is shipped
from the factory with a threaded plug in one of these conduit
openings. This plug is suitable for use in hazardous locations.
All field wiring for Model 100P must comply with requirements
of the NEC or applicable local electrical codes, including wire
gauges and insulation temperature ratings. Conduit seals may be
required.
With no power to the wires, remove the unit’s cover, move the
insulator flap to the side (exposing the terminal block), and
connect the wires to the terminal block. (See Figure 1.) There are
three ways of wiring model 100P Enclosure 7, depending on
which Electrical Form the unit is; Figure 2 shows the electrical
schematics for Forms CC, C, and Z.
On forms C and CC, it is not mandatory to connect both NC and
NO wires to the switch.
Return the the insulator flap to its position over the terminal
block. If the setpoints are not to be adjusted at this time, reinstall
the unit’s cover, making sure that it is bottomed and compressing
its O-ring.