Assortment / System Description

Ceiling heating/chilled ceiling application
Preheating
16
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16.10 Preheating
The central functions can trigger the preheating function to heat up a room at
end of the night setback period as quickly as possible to the Pre-Comfort
setpoint. This impacts the plant operating mode of the application.
16.11 Emergency mode
The setpoint for protection ensures that room temperatures do not change
below or above a critical limit.
16.12 Free cooling
The function free cooling to take advantage of cooling generated without effort
to cool the rooms to a room temperature setpoint. Dew point compensation is
still available for the chilled water temperature setpoint dependent on active
dew point detector via the grouping function.
This supply chain is continued accordingly, in other words chilled water
generation (chillers, refrigeration machines, etc.) are also controlled based on
demand.
16.13 Reset setpoint
The central function can reset a local change to a setpoint on the room
operator unit. The management station can manually reset the value or the
reset can also be automatic by a scheduler. Setpoints for room temperature,
ventilator stage, and room operating mode can be reset.
16.14 Free inputs/outputs
Inputs and outputs can be configured as free inputs on all DXR2s. This permits
the querying of unused input and output switching states or directly controlling
another device over BACnet.
16.15 Centrally override valves
Central functions permit the central override of all valve in the supply group.
The following parameters can be used.
Description Name Default value
Enable valve position override
0:No
1:Yes
EnVlvPosOvrr 0:No
Valve position override VlvPosOvrr 100 [%]