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The pre-assembled, ready-to-connect blowdown unit is used for automatic control of the salt content in the circulating water of cooling and humidifier circuits. The functions of the control system include blowdown, enabling of the circulation pump and control of up to three dosing pumps (1x volume-controlled for hardness stabilizer, 2x time-controlled with monthly timer for biocide 1 and 2). Thanks to the built-in micro SD card (4 GB), data logging is possible in accordance with the 42nd BImSchV.
The scope of delivery of the bypass measuring section corresponds to that of the blowdown unit except for the blowdown valve. This must be ordered separately or provided by the customer.

Benefits

• Operating message for one of the four functions (blowdown, circulation pump, volume- or time-proportional dosing)
• Warning/fault messages are immediately visible due to the colour change in the display
• Blowdown valve (motorized ball valve) is closed when de-energized, no risk of the system running empty in the event of a power failure
• Data from micro SD card easy to read out

Applications

• For controlling cycles of concentration in open cooling circuits or air humidifiers and for controlling up to three dosing pumps (1x volume-controlled for hardness stabilizer, 2x time-controlled with monthly timer for biocide 1 and 2)

Controller :

Cooltrol data

Cabel length:

2 m

Reference temperature:

25 °C

Output blowdown valve:

Mains voltage, max. 4 A

Output volume-prop. dosing:

open collector

Output time-prop. dosing 1/2:

floating, max. 250 V AC / 3 A

Warning output:

floating, max. 250 V AC / 3 A

Fault output:

floating, max. 250 V AC / 3 A

Protection class:

IP 65

Operating signal:

floating, max. 250 V AC / 3 A

Current output:

4 - 20 or 0 - 20 mA active

Conditions of use:

The unit may only be used to control or measure conductivity in open cooling circuits and humidifiers and for dosing biocides in water-bearing systems. Blowdown valve on site.

Operating pressure:

0.2 – 6.0 bar

Operating temperature:

0 – 40 °C