User Manual

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7.3 FCU or chilled/heated ceiling: T, RH
(D) KNX room thermostat
RDG165KN
Inbuilt sensors for T, RH and
algorithm for humidity control
See Data Sheet for RDG165KN
(CE1N3191en)
Field devices depend
on application
(see illustration)
Universal control: FCU, chilled/heated ceiling
• For temperature and humidity control
• Control sequences for heating and/or cooling, 1 or 2 stages
• Dewpoint monitoring
• Multifunctional inputs: key card contact, external sensor
• Multifunctional inputs: window contact, presence detector, etc.
• Interworking with KNX communicating sensors AQR.., QMX..
• Automatic or manual heating/cooling changeover
• Supports applications with 6-port control ball valve
Humidity is controlled in two ways: firstly, by adapting the room
temperature (within an acceptable range) to decrease/increase relative
humidity, and then, if necessary, by switching an external
humidifier/dehumidifier.
7.4 Control of fine dust PM2.5 by improving air filtration
(E) Improving central AHU
air filtration
To ensure a clean, fresh indoor climate, additional special filters can be
installed in ventilation systems to protect against PM2.5 and other
pollutants. Typically, filters with different filter classes are installed in an
AHU as shown in the illustration below: prefilters absorb the largest
particulates to protect and extend the lifetime of the relatively expensive
HEPA filter.
Electrostatic filters (ESPs)
Electrostatic precipitators (ESPs) use an electric charge to filter the parti-
cles. System efficiency is 90-98%, with a low pressure drop across the unit.
HEPA filters
HEPA filters (high-efficiency particulate air) are certified to meet US and
European test standards. They eliminate 99.97% of contaminants in the air
that are 0.3 microns in size.