Technical data

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Precision Air Conditioning
Precision Air Conditioning
20
Technical Manual : 6258867 F 07/2012
Controls
STANDARD FEATURES
Duty/Standby Operation
The controller enables units to operate in run/standby mode, with up to 6 units networked
together, without the need for additional hardware or controllers. Standby units can be
configured to start when the run unit has a critical alarm and/or a high/low return air
temperature alarm.
Duty Rotation
(Network Units)
Networked units can be configured to duty rotate, providing equal hours run of fans
and compressors.
Head Pressure Control
and Condenser Fan
Speed Controller
Each refrigerant circuit is fitted with condenser pressure transducers and a modulating
condenser fan speed controller to allow the designed head pressure to be monitored and
maintained under varying ambient conditions. Condenser fan speed control settings are
adjustable via the display keypad.
As standard, the Intelligent Head Pressure Control option is included when the EEV
option is selected.
Chilled Water
Temperature Monitoring
NTC type thermistors are provided to monitor the chilled water entering and
leaving temperatures.
Evaporator Fan Speed
Controller
(Sizes 9 - 19)
Evaporator fan speed control is easily set via the display keypad and can be
incrementally increased or decreased to meet on site airflow requirements.
Occupied / Unoccupied
Set Points
Occupied and unoccupied set points are provided for temperature, humidity and head
pressure control settings.
OPTIONAL EXTRAS
LPHW Frost Protection
(DX units with LPHW
option)
The frost protection thermostat provided, is mounted between the DX and LPHW coils
and has a fixed 3°C setting to disable DX cooling.
Enables Controlled units to be interfaced with most BMS, factory fitted,
please contact Airedale.
A wide range of protocols can be accommodated through the use of interface devices.
Available as a standard option are: ModBus/Jbus, Carel and Trend.
BMS Interface Card
For interfaces such as SNMP, LonWorks, Metasys and BACnet, please contact Airedale.
Also available is Airedale’s own supervisory plug-in BMS card pCOWEB.
Based on Ethernet TCP/IP secure technology with SNMP features.,
Requires no proprietary cabling or monitoring software and supplied pre programmed with
an IP address for ease of set up.
GSM Modem Kit
Allows remote alarm monitoring by sending alarm text messages to a nominated mobile
phone, factory set.
GENERAL