Installation
310622C
11
Leak Detection System
The leak detector will detect leaks in your diaphragm
pump system. The detector includes an LED indicator
on the control box to signify a problem. Sensors detect
liquid. The control box is the power source and reads
the sensors.
1.
Install leak detector to the diaphragm pump.
2.
During normal operation the LED indicator on the
control box will blink once per second.
3.
During normal operation the sensor lights will blink
once per second.
4.
If the system detects a problem, the LED on the
control box will blink three times per second and the
alarm will sound. See
Sensors
The sensors use two methods of detection: optical and
conductivity.
Having dual conductivity and optical sensors allows the
sensor detect as many liquids as possible. When both
sensors are in air, both lights (blue and yellow) flash
once per second. When the sensors are in water, nei-
ther light will flash. If the sensors are in alcohol, only the
blue light will flash. Alcohol is not conductive and will not
trigger the conductivity sensor.
Control Box
The control box can be powered by 230 VAC, 110 VAC,
or 24 VDC.
AC power is connected to J1 on the circuit board.The
ground connection is the pin between the pins N and
110.
1.
To operate on 230 VAC, connect between pins N
and 220.
2.
To operate from 110 VAC, connect between pins
marked N and 110.
3.
To operate from 24 VDC, connect to J5. J5 is
marked for positive and negative polarity. Discon-
nect any power to the AC connector J1 if the system
is to be powered by 24 VDC.
The control box powers and reads the sensors every
second. If the sensors detect liquid, the control box will
alarm and set it’s fault relay.
Relay
The relay (a latching type) has two sets of contacts that
can be used to indicate the error by turning off a valve,
lighting a light, etc. The relay contacts are rated at 0.3
amps at 230 VAC. The contacts are located at J4 on the
circuit board. There are two separate sets of NO/NC
contacts labeled CRS.
•
C is Common.
•
R is Reset, which is connected to Common during
normal operation.
•
S is Set, which is connected to Common when an
error is detected.
For example, if an air valve was held open during normal
operation, the power to the valve would enter at C and
exit at R. During normal operation C and R are shorted
and would open if liquid were detected by a sensor. This
would stop the pump. Power must be maintained to the
control box for the pump to operate. When the control
box looses power it will set the relay. Both sets of CRS
contacts are floating contacts or electrically isolated
from each other and the electronics on the control
board. They do not supply power and should be used as
a switch only.
Sensors
Definition
Conductivity
The two metal pins on the sensors.
Controls the blue light and its signal
is the white wire in the control box.
Optical
The plastic dome in the center of the
sensor. Controls the yellow light and
its signal is the green wire in the
control box.
