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Model 2175 Microprocessor-Based Conductivity Cooling Tower Controllers
Product Information
LONWORKS® Technology is the latest in microprocessor capability that gives the user the highest level of
application flexibility. A large graphic screen, multiple inputs and very easy setup with easy field upgrade characterize this new technology.
* LONWORKS is a registered trademark of Echelon Corporation.
Features
- 4-electrode conductivity includes fouling compensation and alarm.
- Integral flowsight & flowswitch lockout.
- Records both makeup (MTR1) and blowdown (MTR2) water meter total gallons.
- Configure blowdown water meter (MTR2) as second makeup meter.
- Blowdown Relay options:
- Bleed x gallons for every x gallons makeup
Bleed x minutes for every x gallons of makeup
Bleed by setpoint
Bleed by cycles of concentration with NCON/NCKT Option
Bleed by multi-setpoint selected with NCON/NCKT Option
- Three user-selectable relay options (four additional with NRLY):
- Feed by setpoint, direct or reverse;
Water meter actuated feed. MTR1, MTR2 or sum;
Feed after blowdown by percent of bleed time;
Feed by percentage of time;
Schedule feed timer (-RTC Option);
General alarm contact.
- Three security levels:
- View only
Operator
Technician
- Four different languages.
- English Spanish (standard)
English French (optional)
English German (optional)
Benefits
- Multiple control options in a single economical package.
- Very accurate control of chemical feed and cycles of concentration.
- Very low maintenance.
- Tolerant to power surges and brownouts.
- Power cord, plug outlets and attached plumbing make installation easy. There is plenty of protected room inside the enclosure for electrician wiring.
- Indicates when to clean sensor.
- Very accurate monitoring of the evaporated water.
- Feeds chemical AFTER blowdown.
- Has expansion slots to add additional control, such as chiller loop monitor and cycles of concentration based on incoming makeup water.
Specifications
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Inputs
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Power
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80-300 VAC 50/60 Hz
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Sensor
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4 electrode Conductivity
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Temperature comp.
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Automatic
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Flow switch
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Dry contact
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Water Meter Input
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Two contacting head or open collector.
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Outputs
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Relays
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Four, 3 Amps @ 120 VAC
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4-20 mA
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Two, isolated w/-35L
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Sensor/Plumbing
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Pressure
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140 psi (9.7 bar) @ 100°F (38° C)
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Max. Temperature
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140°F (60° C)
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Min. Flow
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1 gpm
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Controller
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Conductivity Range
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0-5,000 µS (other ranges optional)
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Conductivity Accuracy
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±40 µS
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Conductivity Resolution
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10 µS
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Deadband
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Adjustable
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Setpoints
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Direct or Reverse (configurable in the field)
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Feed timer
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Adjustable
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Keypad
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Numeric
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Display
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Illuminated 128x64 pixel LCD
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Ambient Temperature
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32-158° F (0-70° C)
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Enclosure
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ABS Plastic
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NEMA 4X Optional
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Ordering Information
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2175
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LONWORKS Technology-based conductivity and water meter actuated chemical feed controller. The 2175 has built-in options for feed on conductivity, blowdown or makeup. Totalizing or makeup, three security levels and blowdown are standard features. Conductivity range is 0-5,000 µS.
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CONTROLLER OPTIONS (optional, select no more than three)
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-RTC
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Adds 24-hour clock and calendar to controller (required to configure relays to feed
chemicals/biocides based on time of day and for data acquisition if using the -RS2L Option). NOTE: Adding an -RTC card does not add relays.
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-35L
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Two 4-20 mA output configurable for remote data acquisition of conductivity.
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-RS2L
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Communications node with shareware software. Requires -RTC Option.
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-NIN
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Network interface node. Allows 1 NRLY and/or up to 3 NCON/NCKT to be added.
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ENCLOSURE OPTIONS (optional)
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-WP
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Weatherproof and watertight. ½ inch knockouts. No outlets or power cords.
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LANGUAGE OPTIONS (optional, choose one, English and Spanish Standard)
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-EF
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English and French.
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-EG
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English and German.
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REMOTE NODE OPTIONS (optional, MUST purchase -NIN Option)
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NRLY
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Four additional relays with enclosure (1 per 2000 Series Controller).
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NCON
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Conductivity node for makeup water or closed loop control (node only).
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NCKT
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Conductivity node for makeup water or closed loop control with PVC sensor, tee and enclosure.
Maximum water pressure and temperature is 120°F @ 100 psi (49°C
@ 6.9 bar). NOTE: NOT FOR USE WITH MULTIPLE COOLING TOWERS.
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SOFTWARE AND EXTERNAL MODEMS
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LRWS
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Windows-based registered software for computer to communicate with 2000 Series Controllers.
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MD4X
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High-Baud modem in NEMA 4X enclosure ready to power.
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MD
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High-Baud modem for use with 2000 Series Controllers.
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