COOLING TOWER CONTROLLERS

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COOLING TOWER CONTROLLER AS3020

The unit type AS3020 is universal applicable for automatic monitoring and control of cooling tower plants. The controller is equipped with an conductivity meter without temperature meter. There are three possible stages : “Service”, “Flush” and “”Flush wait”. This unit can monitor conductivity and several inputs e.g. level switches, low pressure switch, exceeded pressure and stop. Adaptable to user specific requirements by built-in programmable options. The programmed configuration will be stored into non volatile memory and therefore not be affected by power loss.

AS3020 TECHNICAL DATA
  • User operated programming using double row of illuminated LCD display
  • Display text in English, French, German or Dutch.
  • Adaption to user specific requirements by means of options programmable on site
  • Extensive status report facility using information button.
  • 2 inputs : tank full and tank empty
  • 2 powered realy outputs: Inlet valve (fused 8A), Flush valve (fused 8A).
  • 1 relay output (dry contact) : Alarm.
  • Secure from power failure as all data is stored long-term without battery.
  • Efficient micro controller with watchdog, illegal operation code and cycle monitoring.
  • Safeguarded from EMC by galvanic separation between microcontroller and in- and output circuits and also by additional interference suppression filter
  • Available for wall-mounting.
  • Available (input /output) : 12VDC/12VDC, 24VDC/24VDC, 24VAC/24VAC, 115VAC/115VAC, 230VAC/230VAC
AS3020 user manual

COOLING TOWER CONTROLLER AS3035

The unit type AS3035 is universal applicable for automatic monitoring and control of cooling tower plants. The controller is equipped with an conductivity meter without temperature meter. There are six possible stages : “Stand by”, “Service”, “Flush”, “Flush Stop”, “Flush blocked” and “Shot dosing”. Adaptable to user specific requirements by built-in programmable options. The programmed configuration will be stored into non volatile memory and therefore not be affected by power loss.

AS3035 TECHNICAL DATA
  • User operated programming using double row of illuminated LCD display.
  • Display text in English, French, German, Italian, Spanish, Swedish, Czech or Dutch.
  • Adaption to user specific requirements by means of options programmable on site
  • 4 programmable stages (Production, Stand-by, Rinse after production, Interval rinse during Standby).
  • Extensive status report facility using information button.
  • 2 inputs : low water pressure and tank full
  • 1 programmable input for : stop, excess pressure or tank empty.
  • 2 powered relay outputs: Inlet valve (fused 8A), High pressure pump (fused 8A).
  • 1 relay output (dry contact) : programmable for Alarm or Concentrate valve.
  • Secure from power failure as all data is stored long-term without battery.
  • Efficient micro controller with watchdog, illegal operation code and cycle monitoring.
  • Safeguarded from EMC by galvanic separation between microcontroller and in- and output circuits and also by additional interference suppression filter
  • Available for wall-mounting.
  • Available (input /output) : 12VDC/12VDC, 24VDC/24VDC, 24VAC/24VAC, 115VAC/115VAC, 230VAC/230VAC
AS3035 user manual

COOLING TOWER CONTROLLER AS3037IT

The unit type AS3037IT is universal applicable for automatic monitoring and control of cooling tower plants. The controller is equipped with an conductivity meter and with temperature meter. There are six possible stages : “Stand by”, “Service”, “Flush”, “Flush Stop”, “Flush blocked” and “Shot dosing”. Adaptable to user specific requirements by built-in programmable options. The programmed configuration will be stored into non volatile memory and therefore not be affected by power loss.

AS3037IT TECHNICAL DATA
  • User operated programming using double row of illuminated LCD display.
  • Display text in English, French, German or Dutch.
  • Simple control utilising easy to follow symbols.
  • Built-in audio signal for 9 programmable signal indicators.
  • Adaption to user specific requirements by means of options programmable on site.
  • Simple operation by means of a few clear operating symbols.
  • Locking of programming possible by use of a code number.
  • Flushing depending on water meter, conductivity and both water meter and conductivity.
  • Input of service telephone number.
  • Extensive status report facility using information button.
  • 2 inputs (fixed function) : water meter and dosing tank 1 empty.
  • 2 programmable inputs : block flushing, dosing tank 2 empty, stop.
  • 1 optional programmable input (IF circuit board) : level switch in tank, stop
  • Inputs programmable active open or closed.
  • 1 connection for conductivity sensor (cell constant programmable from 0,01 to 10,00 cm-1).
  • Manual or automatic temperature compensation.
  • 2 relay outputs with fixed function : flush valve (powered), dosing output (dry contact).
  • 1 programmable relay output (dry contact): shot dosing, alarm
  • 2 optional programmable relay outputs (dry contact): flush valve, shot dosing, alarm, flow pulse, circulation pump. (IF circuit board).
  • Output relay programmable active under current or not under current.
  • Secure from power failure as all data is stored long-term without battery.
  • Efficient micro controller with watchdog, illegal operation code and cycle monitoring.
  • Safeguarded from EMC by galvanic separation between microcontroller and in- and output circuits and also by additional interference suppression filter.
  • Available for wall-mounting.
  • Available (input /output) : 24/24VAC, 115/115VAC, 230/230VAC, 115/24VAC, 230/24VAC
AS3037IT user manual

COOLING TOWER CONTROLLER AS3050/51

The unit type AS3050 or type AS3051 is universal applicable for automatic monitoring and control of cooling tower plants. The controller is equipped with a conductivity meter optional is a second conductivity meter and temperature meter. Also optional is a circuit board with two recorder outputs (0(4) – 20 mA). There are six possible stages : “Service”, “Flush”, “Low level”, “Flush blocked” and “Shot dosing”. Adaptable to user specific requirements by built-in programmable options. The programmed configuration will be stored into non volatile memory and therefore not be affected by power loss.

AS3050/51 TECHNICAL DATA
  • Menu driven programming utilising “two line” LCD-display.
  • Choice of languages (English, French, German or Dutch)
  • Adaptable to user specific requirements by built-in programmable options.
  • Simple control utilising easy to follow symbols.
  • Universally applicable for various sizes of installation.
  • Programming a service telephone number possible.
  • Substantial status information employing INFO key: actual input and output conditions, service telephone number, software version, programming situation of the annunciation and malfunction relays, instrument probe cell constants.
  • Large green LCD-display showing water conductivity.
  • 7 Inputs : low level 1, tank full, tank empty, flush blocking 1, flush blocking 2, low level 2, water meter.
  • 3 relay outputs (powered) : flush valve 1, flush valve 2, inlet valve.
  • 3 relay outputs (dry contact) : dosing output 1, dosing output 2, alarm.
  • Integrated conductivity meter with automatic range switching.
  • Conductivity range according to the instrument probe cell constants from 0,1 to 1 00 000 µS/cm.
  • The instrument probe cell constants programmable from 0,01 to 10,00 cm-1.
  • Manual or automatic temperature compensation.
  • Duplicate conductivity meter and temperature reading as an available option.
  • Second cooling tower plant possible when card with two conductivity meters is installed. Status of second cooling tower control only in LCD display (not with LEDs).
  • Security of program information against supply failure, as all program information is stored without accu.
  • Large capacity microprocessor with “Watchdog”, illegal “Operation code” and frequency monitoring.
  • Manufactured in accordance with EMC codes of practice; by means of galvanic isolation between the micro-processor and the in- and output circuits, plus extra built-in filter.
  • Available for wall-mounting (AS3050) and panel-mounting (AS3051).
  • Available (input /output) : 24/24V, 115/115V, 230/230V.
AS3050/51 user manual

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