ProMinent DCM 2 Series, Installation Manual

Page: 6 / 37

DCM 2 Installation
Page 6
Configuration Hazards
Flow Switch Function
The above precaution pertains to Input ‘F’ lockouts as well as the integral sample flow switch on input ‘E’.
If disabled or bypassed, the sensor would not be able to sense a hazardous situation and turn of the
chemical feed pumps to prevent uncontrolled chemical feed.
Test Flow Switch Function
If flow switch ‘float’ does not drop to the bottom and remain there during no-flow, backwash, or very low
flow conditions, the controller cannot prevent the uncontrolled feed of chemicals, which could cause
personal injury or death.
Testing of the flow switch periodically is essential to verify that low sample water flow will disable the feed
of chemicals. When flow to sensor housing is interrupted or, slowed below 10 gallons/hour, the controller
blue OK LED will start to flash and the LED status for each feeder will show “OFF:Interlocked E” within 2
NEVER OVERRIDE A FLOW SWITCH
Uncontrolled feeding of concentrated chemicals can result in personal injury
or death. Sample and recirculation flow switches are critical safety devices
which prevent uncontrolled chemical feed. Follow Instructions Carefully.
Flow switches are provided with all ProMinent pool controllers and are an
integral safety device to prevent the uncontrolled feed of chemicals, which
could cause personal injury or death. This critical safety device must always
be available to protect the swimmers and others near the pool.
Flow switches should NEVER be bypassed, even temporarily.
Test Flow Switches Weekly
Stop the flow of sample water to the
sensor housing to verify interlocks
are functioning.
Fully understand the implications of the control setpoints,
interlocks and alarms that you select.
Injury or damage to equipment may result from improper
configuration.
Unplug or turn OFF the AC power to the controller if you
have any concerns regarding safety or incorrect controller
operation, and notify supervisory staff.
Aquatic Water
Treatment Controllers
operate chemical
feeders and other
devices that may pump
hazardous, corrosive
and toxic chemicals.