Daikin EWWD480CJYNN [43/180] Main control software features

ESIE07-05 The Digital Controller

Part 2 – Functional Description 2–5

1.3 Main Control Software Features

P Control of evaporator outlet or condenser outlet or both temperature.

P Control of leaving water within a ± 0.1 °C (with a steady-state load).

P Management of sudden load reduction up to 50% with max 3°C controlled temperature obscillation

P Readout of all unit operating main parameters (temperature, pressures, etc.)

P Automatic control of primary evaporator and condenser pumps.

P Condensation control with step logic, single or double fan speed controllers and mixed step+speed

control (speedtroll)

P Control up to 4 steps of cooling tower (WHS) plus bypass valve WHS with proportional signal

0-10 Vdc

P Setting of a double setpoint with local or remote switch. This function allows to modify the local

setpoint between two values previously settled.

P Setpoint override using an external signal (4-20 mA), outside ambient temperature or evaporator

return temperature.

P Adjustable Max Pull-Down rate reduces under-shoot during loop pull-down.

P Hot Chilled Water Start feature allows the unit startup without any problem also with high

temperature evaporator water.

P SoftLoad feature reduces electrical consumption and peak demand charges during loop pulldown.

P Unit Limiting feature allows to limit electrical consumption based either on current absorption

(current limit) or on demand capacity (demand limit).

P Panel mounted 15 key keypad for a rapid interface. Operator can log chiller operating conditions

on the backlight display 4 line by 20 character.

P Four levels of security protection against unauthorized changing.

P Diagnostic System of compressors constituted by the memorization of the last ten alarms, showing

the date, the time and operating conditions at the time the alarm occurred.

P Weekly and yearly start-stop time schedule

P Easy integration into building automation systems via separate 4-20 mA signals for chilled water

reset and demand limiting.

P Communications capabilities for remote monitoring, changing of setpoint, trend logging, alarm and

event detection, via a compatible IBM-PC where is installed McQuay MICROPLANT 2.0 software.

P BAS communication capability via Modbus, LonWork, Johnson Metasys

P Remote communications capabilities via modem (up to 8 chillers with Gateway Modem).

P Remote communications capabilities via GSM Modem.