Skip to content
Logo
  • English
    • German

55 Matrix

  • Connection diagram / port overview
  • Function »Heating– Cooling«
  • Setting the corresponding parameters
  • Setting the target temperature
  • Operating lock
  • Set display to standby mode
  • Switching the device on / off
  • RMO (operating mode)
  • BOS (Boost)
  • PRG (heating program)
  • Setting up heating programs
  • VAT (Temperature holiday mode)
  • BRW / BRS (Display brightness)
  • NET (Set up WiFi)
  • DAT (date, time)
  • SWT (summer time / winter time)
  • INS (Installer)
  • CMO (control algorithm)
  • WEH (type of heating)
  • SMO (sensor mode)
  • DIF (Hysteresis)
  • ADP (Smart Start)
  • FLT (Temperature limiter floor sensor)
  • VAL (operating principle)
  • VPA / VPD (Valve protection)
  • TSS (Temperature Unit)
  • WMO (manual heating / cooling)
  • CAR / CAF / CAE (calibration)
  • ALO / AHI (setpoint limiter)
  • FLO / FHI (setpoint limiter)
  • ELO / EHI (setpoint limiter)
  • ANT (time automatically)
  • COL (block cooling)
  • FAC (factory reset)
  • ESC (exit)
  • Alpha smart app
View Categories
  • Systemauswahl
  • Alpha thermostat direct
  • 55 Matrix
  • VPA / VPD (Valve protection)

VPA / VPD (Valve protection)

VPA
Duration control
Adjustable in 1-minute-increments between 1 and 10 minutes (default: 5 min)

VPD
Cycle interval of the valve protection
Adjustable in 1-day-increments between 1 day and 28 days (default: 14 Tage)

Updated on January 26, 2026
VAL (operating principle)TSS (Temperature Unit)

© 2024 | 300724

  • Supportrequest
  • Privacy Statement
  • Imprint
  • Supportrequest
  • Privacy Statement
  • Imprint