2
3A1827C
Pressure Relief Procedure
Installation
1.
Disconnect power to pump.
2.
Disconnect cable from switch.
3.
If replacing a pressure switch on an existing installa-
tion, relieve pressure.
4.
Locate unit where shock, vibration and ambient tem-
perature fluctuations are minimal. Do not mount in
ambient temperature areas exceeding 160°F
(71°C).
•
Unit may be mounted in any position. However,
if installation location results in frequent expo-
sure to liquid it is recommended that the unit be
mounted vertically with the pressure connection
down.
5.
Screw switch into manifold. Always use a wrench on
pressure connection wrench flats.
6.
Test unit before use.
Adjustments
1.
Rotate the top portion of switch (with the lock and
unlock symbols) to align the unlock symbol with the
two white arrows (F
. 1).
2.
Adjust set point to the desired pressure setting.
2500 psi (172 bar, 17.2 MPa) is the factory default
setting.
3.
Adjust the reset point to the desired pressure set-
ting. 500 psi (35 bar, 3.5 MPa) is the factory default
setting.
4.
Rotate the top portion of the switch to align the lock
symbol with the two white arrows (F
. 2).
5.
Recheck set point and reset point and install switch
according to installation instructions.
Status LED’s
Relieve pressure in the system following the procedure
recommended for your operating system or pump.
NOTICE
•
Electrical ratings must not be exceeded. Over-
load on a switch can cause switch to fail on the
first cycle.
•
Never exceed pressure limits. Unit can be oper-
ated up to maximum pressure on a limited basis
(i.e., set-up, testing) but continuous operation
must be restricted to the designated adjustable
range. Excessive cycling at maximum pressure
limits could reduce sensor life.
F
IG
. 1
F
IG
. 2
Steady Green
LED
Power is supplied to pressure switch.
Yellow LED turns
off and on
When you reach pressure, yellow LED
lights. When pressure drops below reset
value, yellow LED turns off.
