Application

Room Segment Functions
Device Control Functions HVAC
63
Siemens Industry, Inc.
Application Note
A6V11692055
Smart Infrastructure – Building Products
2019-04-01
Equipment Safety - High Temperature Cut-out Switch
The electric heating coil control logic is configured for heating coil over-
temperature detection input (HclOvrTDet) from a high temperature cut-out
switch.
When the switch activates, the coil is commanded off at equipment protection
priority and a signal is sent to the source of airflow to hold / maintain airflow. A
timer prevents the source of airflow from stopping until after the timer expires.
NOTE:
This equipment safety is optional and NOT IMPLEMENTED in this application
template.
Monitor Electric Power Usage
The nominal electric power usage of the electric heating coil(s) is provided for
energy monitoring and coordination with other devices. When the coil is ON at
100%, the heating coil electric power (HclElPwr) is equal to the Nominal Electric
Power (NomElPwr) of the coil; when the heating coil is ON at 50% the heating coil
electric power (HclElPwr) is equal to the 50% of the Nominal Electric Power
[NomElPwr] of the coil.
Configuration
Description
Parameter
Preloaded value
Enable overtemperature detector input
EnOvrTDetIn
0:No
Nominal electric power
NomElPwr
0.4 [kW]
Switch-on point for air volume flow hold heating
SwiOnAirFlHldH
33 [%]
Hysteresis for air volume flow hold heating
HysAirFlHldH
16 [%]
Switch-off delay for hold signal for air volume flow heating
DlyOffAflHldH
30 [s]
Switch-on point for air volume flow heating request
SwiOnAirFlHReq
33 [%]
Hysteresis for air volume flow heating request
HysAirFlHReq
16 [%]
Switch-on delay for air volume flow heating request
DlyOnAirFlHReq
0 [s]