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System security
Phase monitor
Freeze protection
An evaporator’s flow controller input (stops the unit)
Remote on/off input.
Regulation type
Proportional + integral + derivative regulation on the input probe of the evaporator water leaving
temperature.
Condensation
The condensation can be carried out according to temperature or pressure. The fans can be managed
according to ON/OFF mode or with a 0/10 V modulating signal.
Controller terminal
The controller terminal has following features:
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4-lines by 20-character liquid crystal display back lighted
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Key-pad consisting of 15 keys “clear language display”
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Memory to protect the data
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General faults alarm led
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4-level password access to modify the setting
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Service report displaying all running hours and general conditions
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Memorized alarm history to facilitate the fault’s analysis.
Tele-maintenance and supervisory systems
The controller can be monitored locally or via modem by the supervision programthat runs.
The supervisory system is the best solution:
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To centralize all the information in just one local and/or remote PC
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To check all the parameters for each unit connected
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Data logging of temperature - pressure
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Printouts of alarms, parameters and graphs
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To control several plants located in different geographical areas from a central station
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To manage the Service centers
The supervisory system allows:
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Visualization of all working conditions for each controller
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Visualization of their graphics
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Display, print-out of the actual alarms
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Connection between local and remote computer via telephone line (Modem)
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Units ON / OFF
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Set point change.
Remote control
Compatibility with supervisory systems is becoming increasingly important in HVAC. The controller allows
easy interfacing with BMS (Building Management Systems), the external world that can be:
•
full compatible Siemens, Johnson;
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every MODBUS compatible system (Satchwell, Honeywell);
BacNet point to point, ECHELON FTT10 (available on request).
Summary of Contents for EWAP 800-C18AJYNN
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