Technical Manual Downflow - Airedale International Air Conditioning
Technical Manual Downflow - Airedale International Air Conditioning
Technical Manual Downflow - Airedale International Air Conditioning
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GENERAL<br />
16<br />
-DF<br />
Controls<br />
Precision <strong>Air</strong> <strong>Conditioning</strong><br />
<strong>Technical</strong> <strong>Manual</strong> : 6259014 v1.3.0 02_2013<br />
Precision <strong>Air</strong> <strong>Conditioning</strong><br />
GENERAL As standard the units are supplied with an microprocessor controller<br />
connected to a 4x20 back-lit LCD display keypad.<br />
TEMPERATURE<br />
CONTROL<br />
The microprocessor controller can be linked together locally to provide<br />
run/standby operation. Windows based supervisor software is also available for local or<br />
remote networking. This modular approach provides great flexibility while at the same<br />
time reducing installation and maintenance costs.<br />
The display keypad features a simple array of keys to navigate through the in<br />
built menus.<br />
For enhanced alarm monitoring, an upgraded controller can be fitted, refer to Controls -<br />
Optional Extras.<br />
A temperature sensor is mounted in the return air with an option for a humidity sensor on<br />
full function units.<br />
The temperature sensor is a NTC type thermistor accurate up to +/- 0.25°C and the<br />
humidity sensor accurate to +/- 3% at 25°C at the sensor.<br />
The microprocessor senses the return air conditions and maintains the return<br />
air temperature and humidity conditions by controlling cooling, heating, humidification and<br />
dehumidification outputs accordingly.<br />
The microprocessor monitors and displays the following values:<br />
Return <strong>Air</strong> Temperature<br />
Return <strong>Air</strong> Humidity (Optional on Full Function units)<br />
Condensing Pressure (Optional on DX units only)<br />
Coil Temperature Sensor (Indoor)<br />
ALARM HANDLING A visual alarm will be generated under the following conditions:<br />
Return air temperature high limit<br />
Return air temperature low limit<br />
Return air humidity high limit (Optional on Full Function units)<br />
Return air humidity low limit (Optional on Full Function units)<br />
Frost protection low limit (LPHW option only)<br />
<strong>Air</strong>flow failure<br />
Compressor failure (Optional on DX units only)<br />
Low pressure trip (Optional on DX units only)<br />
Electric Heating Overheat cut-out<br />
Filter change alarm<br />
<strong>Manual</strong> override<br />
Common alarm<br />
Power fail reset<br />
Communications failure<br />
Humidifier alarm (Full Function units only)<br />
Maintenance - fan and compressor (once hours run limit exceeded)
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