Viessmann VITOTRONIC 200 Service Instructions Manual page 116

Diagnosis
System overview
(cont.)
Meaning of the symbols and values
Column : Brief summary, generator side
qQ
Line Symbol/value
A
B
C
E
1
F
2
3
G
H
K
Column : DHW heating
qW
Line Symbol/value
A
54
B
50
C
47
D
85
F
G
H
Column : Buffer cylinder/swimming pool
qE
Line Symbol/value
A
45
B
43
C
43
D
42
E
30
F
G
30
H
K
L
116
Back to system overview, generator side
Heating with heat pump: Secondary pump on, 3-way diverter valve "Central heat-
ing/DHW heating" set to heating
DHW heating with heat pump/heat pump stage 1: Secondary pump on and 3-way
diverter valve "central heating/DHW heating" set to DHW heating or circulation
pump for cylinder heating ON
Compressor
—
Instantaneous heating water heater, stage 1
Instantaneous heating water heater, stage 2
Instantaneous heating water heater, stage 3
Solar circuit pump
—
—
—
DHW heating
Set cylinder flow temperature in °C
Top cylinder temperature in °C
—
—
—
DHW circulation pump
Heating water buffer cylinder
or
Heating water/coolant buffer cylinder
Set buffer temperature in °C
Buffer temperature in °C
Set system flow temperature in °C
System flow temperature in °C
—
Swimming pool heating
Swimming pool flow temperature (with heat pump cascade) in °C
Swimming pool heating demand (signal from temperature limiter for swimming pool
temperature control)
Circulation pump for swimming pool heating
Compressor/compressor 1
with 2-stage refrigerant
circuit
Compressor 2 with 2-
stage refrigerant circuit
External heat generator demand
Immersion heater in DHW cylinder
Circulation pump for cylinder reheating
Bottom cylinder temperature in °C
Cylinder loading pump output in %
Cylinder loading pump
Buffer outlet temperature (with heat pump cascade) in
°C
Compressor
—