Assortment / System Description

Radiant/chilled ceiling application
2-pipe ceiling heating
15
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15.6 2-pipe ceiling heating
Figure: Example for a heated ceiling application 2-pipe system
Key:
DXR2… Room automation station R1 Room operator unit
Rcg Heated ceiling valve D1 Presence
CdnMon Condensation monitor D2 Window contact
Y Output signal TR Room temperature
SpH Effective heating setpoint SpC Effective cooling setpoint
YH Heating valve
Figure: Modulating heating sequence
15.7 Actuators
The DRX2 automation station controls heated/chilled ceiling valves via Triac or
analog outputs, regardless of available I/Os. 3-position actuators, thermal pulse
width modulation (PWM) actuators, PWM actuators with return spring can be
connected to the Triac outputs.
A maximum of 1 thermal valve can be connected to each Triac on the DXR2
automation station with AC 230 V power.
Conventional 0…10V actuators as well as 6-port valves can be connected to
analog outputs.
Plant diagram
Sequences