AS3050

Summary

Product identification

• Product type: AS3050 or AS3051 controller for cooling tower plants.

Description

This controller is designed for automatic monitoring and control of cooling tower plants. It features a conductivity meter, with an optional second conductivity meter and a temperature meter. An optional circuit board provides two recorder outputs (0(4)-20 mA). The unit offers six programmable stages: "Service", "Flush", "Low level", "Flush blocked", and "Shot dosing". Configuration settings are stored in non-volatile memory.

Features

User Interface

• Monochrome LCD display (16x2 characters)
• Control via six keys
• Ten LEDs for process and alarm indication
• Available languages: English, French, German, Dutch, Spanish, and Italian

Inputs

• 7x Input for potential-free switch
• 1x Conductivity meter
• Optional circuit board for:
  • 2nd Conductivity meter
  • 1x Temperature meter

Conductivity meter

• Automatic range switching
• Cell constants from 0.01 to 10.00 cm⁻¹
• Range from 0.5 to 100,000 µS/cm (depending on cell used)
• Manual or automatic temperature compensation
• Capacitive cell

Temperature meter

• Range from 0 to 94°C (32 to 201 °F)
• PT1000 sensor

Outputs

• 4x Relay output (powered)
• 3x Relay output (dry contact)
• Optional circuit board for:
  • 2x Analogue output (0-20mA) for recorder

Memory

• Programming is stored and unaffected by power loss.

Enclosure

• AS3050: Suitable for wall mounting, IP65
• AS3051: Suitable for panel mounting, IP42

Power supply

• 24 VAC input / 24 VAC output
• 115 VAC input / 115 VAC output
• 230 VAC input / 230 VAC output

Function Table

Relay Outputs

• Flush valve
• Inlet valve
• Proportional dosing
• Biocide dosing
• Alarm

Digital Inputs

• Water meter
• High level switch
• Low level switch
• Flush Blocking 1
• Flush Blocking 2
• Low level 1 circulation tank
• Low level 2 circulation tank

Ordering Information

Wall mounted (AS3050)

• AS3050/1: with 1 conductivity meter
• AS3050/2: with 2 conductivity meters and 1 temperature input
• AS3050/1/I: with 1 conductivity meter and 2 recorder outputs
• AS3050/2/I: with 2 conductivity meters, 1 temperature input, and 2 recorder outputs

Panel mounted (AS3051)

• AS3051/1: with 1 conductivity meter
• AS3051/2: with 2 conductivity meters and 1 temperature input
• AS3051/1/I: with 1 conductivity meter and 2 recorder outputs
• AS3051/2/I: with 2 conductivity meters, 1 temperature input, and 2 recorder outputs

Power Supply Options (add to codes above)

• 24V: 24 VAC / 24 VAC
• 115V: 115 VAC / 115 VAC
• 230V: 230 VAC / 230 VAC

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Disclaimer: This extraction may miss figures, footnotes, or revisions. Contractual data must match the OEM PDF revision used on the project.

Official datasheet (PDF)

Lenntech datasheet mirror