Vaillant sensoCOMFORT VRC 720 Manual De Uso E Instalación página 29

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-- Using the functional modules, basic system diagram, start-up 4
Abbreviation
Meaning
12p
Radio receiver unit
12q
Internet gateway
13
Ventilation unit
14a
Supply air outlet
14b
Extract air inlet
14c
Air filter
14d
Reheater
14e
Frost protection element
14f
Silencer
14g
Restrictor flap
14h
Weather guard grille
14i
Extract air box
14j
Air humidifier
14k
Air dehumidifier
14l
Air manifold
14m
Air collector
15
Cylinder ventilation unit
BufBt
Bottom buffer cylinder temperature sensor
BufBtCH
Bottom temperature sensor for heating sec-
tion of buffer cylinder
BufTopCH
Top temperature sensor for heating section
of buffer cylinder
BufBtDHW
Bottom temperature sensor for DHW section
of buffer cylinder
BufTopDHW
Top temperature sensor for DHW section of
buffer cylinder
C1/C2
Enable cylinder charging/buffer cylinder
charging
COL
Collector temperature sensor
DEM[x]
External heat demand for the heating circuit
DHW
Cylinder temperature sensor
DHWBt
Bottom cylinder temperature sensor (do-
mestic hot water cylinder)
DHWBt2
Cylinder temperature sensor (second solar
cylinder)
EVU
Energy supply company switching contact
FS[x]
Flow temperature sensor for heating cir-
cuit/swimming pool sensor
MA
Multi-function output
ME
Multi-function input
PV
Photovoltaic inverter interface
PWM
PWM signal for pump
RT
Room thermostat
SCA
Cooling signal
SG
Transmission system operator interface
Solar yield
Solar yield sensor
SysFlow
System temperature sensor
TD1, TD2
Temperature sensor for a differential temper-
ature control
TEL
Switch contact for remote control
TR
Isolating circuit with switching floor-standing
boiler
0020287900_00 sensoCOMFORT Operating and installation instructions
27

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