Daikin EWWQ-KC, Руководство по эксплуатации

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2. GENERAL DESCRIPTION
2.1. Basic Information
POL468.85/MCQ/MCQ is a system for controlling single or dual-circuit air/water cooled chillers. POL468.85/MCQ/MCQ controls
compressor start-up necessary to maintain the desired heat exchanger leaving water temperature. In each unit mode, by installing
proper bypass options, it can control the operation of the condensers to maintain the proper condensation process in each circuit.
Safety devices are constantly monitored by POL468.85/MCQ/MCQ to ensure their safe operation.
Abbreviations used
In this manual, the refrigeration circuits are called circuit #1 and circuit #2. The compressor in circuit #1 is labelled Cmp1. The
other in circuit #2 is labelled Cmp2. The following abbreviations are used:
W/C Water Cooled ESRT Evaporating Saturated Refrigerant Temperature
CP Condensing Pressure EXV Electronic Expansion Valve
CSRT Condensing Saturated Refrigerant Temperature HMI Human Machine Interface
DSH Discharge Superheat MOP Maximum operating pressure
DT Discharge Temperature SSH Suction Super-Heat
EEWT Evaporator Entering Water Temperature ST Suction Temperature
ELWT Evaporator Leaving Water Temperature UC Unit controller (POL468.85/MCQ/MCQ)
EP Evaporating Pressure R/W Readable/Writable
2.2. Controller Operating Limits
Operation (IEC 721-3-3):
•
Temperature -40...+70 °C
•
Humidity < 95 % r.h (no condensation)
•
Air pressure min. 700 hPa, corresponding to max. 3,000 m above sea level
Transport (IEC 721-3-2):
•
Temperature -40...+70 °C
•
Humidity < 95 % r.h (no condensation)
•
Air pressure min. 260 hPa, corresponding to max. 10,000 m above sea level.
2.3. Controller Architecture
The overall controller architecture is the following:
•
One
POL468.85/MCQ
main controller
•
Peripheral Bus is used to connect I/O extensions to the main controller.
2.4. Controller maintenance
The controller requires to maintain the installed battery. Every two years it’s required to replace the battery. Battery model is:
BR2032 and it is produced by many different vendors.
WARNING To replace the battery, it is important to remove the power supply to all unit.
Refer to picture below for battery installation.