Siemens Climatix S300 HRV - Electric Preheating Coil (Prehclel21 Y)

5.14.3 Electric Preheating Coil (PreHclEl21y)
The electrical preheating coil contains a temperature sensor TSuAfPreHcl before
heat recovery and an overtemperature detector. The control is carried out
continuously via an analog output, pulsed via a triac output or switched via a binary
output. The setpoint for TSuAfPreHcl is influenced by the outdoor air temperature
TOa. The curve settings can be configured. If the ERC is defrosted, the setpoint
can be increased to a configurable defrost setpoint.
For safety reasons, the overtemperature detector switches off the electric heater
and the entire HRV plant (A alarm).
The overtemperature detector must be connected to the electric heater via
hardware unless local regulations allow software interlock.
Available parameters
Actual values BACnetobject R/RW Note
Electric preheater position PreHclElPos
AO,63(Y1)
AO,104 (A1)
AO,113 (A2)
AO,122 (A3)
AO,131 (A4)
AVAL,383 (POS9)
AVAL,472 (AO1)
AVAL,479 (AO2)
RW
Electric preheater command PreHclElCmd
BO,52 (Q1)
BO,67 (Q2)
BO,82 (Q3)
BVAL,243 (POS9)
RW
Supply air temperature after preheater TSuAfPreHcl
AI,56 (B3)
AI,62 (B4)
AI,78 (X8)
AVAL,315 (POS9)
R
Preheating coil overtemperature detector PreHclOvrTDet
BI,74 (D1)
BI,91 (D2)
BI,108 (X3)
BI,125 (X8)
R
Application functionalities
Preheating Functions
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