Overview
3A6976C
5
Overview
Usage
The leak detection system monitors air operated double
diaphragm pumps for diaphragm rupture or other leaks
that may contaminate the fluid being pumped. The sys-
tem is made up of a main control box and two liquid
detection sensors. The sensors are screwed into the air
side of each diaphragm on the pump. Each sensor cor-
responds to a green LED indicator on the control box.
When a sensor detects liquid, the corresponding green
LED indicator will extinguish and the red FAULT LED
indicator will light, indicating a diaphragm rupture or
other leak has occurred. The control box also has the
ability to control an external device such as an alarm,
light, or air solenoid via an onboard relay.
During normal operation, the green LED indicators on
the control box will remain lit. The red FAULT LED
indicator will remain extinguished, indicating proper
operation.
Component Identification and
Description
Before you install the system, you should be familiar
with the parts discussed in the following paragraphs.
Sensors
The sensors are mounted on the pump to detect liquid
on the air side of each diaphragm. See F
IG
. 5.
NOTE: Leak sensor kit 17Z667 is ATEX certified and
should not be used with control box kit 25P303. Control
box kit 25P303 is not rated for use in hazardous
locations.
Control Box
The control box powers and continuously monitors the
sensors. It will display a fault condition by lighting the
red FAULT LED indicator when a diaphragm rupture or
other leak is detected. The FAULT LED indicator will
remain lit until the reset button is pressed.
Relay
The relay has two sets of contacts that can be used to
indicate an error by activating an output signal, such as
turning off a valve, lighting a light, etc. The contacts are
located on the CR3 terminal strip. See F
Grounding
Follow the instructions in your pump manual to ground
the diaphragm pump system and check its electrical
grounding continuity.
The control box does not require electrical grounding.
