Application

Room Segment Functions
Device Control Functions HVAC
68
Siemens Industry, Inc.
Application Note
A6V11692053
Smart Infrastructure – Building Products
2019-04-01
Configuration
Description
Parameter
Default value
Switch-on point for hot water demand
▶ When the radiant ceiling heating valve position is
greater than the switch-on point, the radiant ceiling
heating valve enables request hot water for heating.
SwiOnPtHwDmd
4 [%]
Hysteresis for hot water demand
▶ When the radiant ceiling heating valve position is
less than the hysteresis value, the radiant ceiling
heating valve disables request hot water for heating.
HysHwDmd
2 [%]
Enable downdraft compensation
0:No
1:Yes
EnDndft
0:No
Downdraft characteristics for outside air temperature
X1
▶ Outside air temperature where radiator hot water
valve provides full (100%) downdraft control.
X1DndftTOa
-5 [°C], 23.0 [°F]
Downdraft characteristics for valve position Y1
▶ The radiator valve position that provides 100%
downdraft control.
Y1DndftVlvPos
100 [%]
Downdraft characteristics for outside air temperature
X2
▶ Outside air temperature where the radiator hot water
valve begins to provide downdraft control.
X2DndftTOa
10 [°C], 50.0
[°F]
Downdraft characteristics for valve position Y2
▶ The radiator valve position that initializes downdraft
control.
Y2DndftVlvPos
25 [%]
Radiator Electric, 1-Stage (RadEl12)
Application template: 14369
This application function operates an electric radiator(s) and supports downdraft
compensation. The main output is a binary output that may be on or off for single
stage operation.
Main features:
● Binary control of electric radiator, single stage operation
● Multiple radiator control (1...n)
● Downdraft compensation
● Heating available status
● Over-temperature detection with high temperature cut-out switch
Function
Radiator heating request (RadHReq) is received and processed into binary output
signal for radiator electric position (RadElPos).
Binary control of electric radiator, single stage operation: In response to heating
demand, the radiator electric position (RadElPos) is switched on/off to control the
room temperature at setpoint. It also can be commanded in response to external
trigger(s) for special modes such as warm-up or cool down, or safety conditions.