H Dual Mode Dhw Heating With Dhw Cylinders Vitocell B 100 Or Vitocell B 300, With Vitosolic 100 - Viessmann Vitosol
100 Technical Manual

4.1 System design 1
Dual mode DHW heating with Vitocell B 100 or Vitocell B 300 DHW cylinder, with Vitosolic 100
DHW heating without solar energy
The top part of the DHW cylinder is
heated by the boiler.
The cylinder thermostat with cylinder
temperature sensor 6 of the boiler
control unit switches cylinder loading
pump 7.
Installation diagram
1
S1 S2 S3 145
1 2 3 4 5 6 7 8
WW
C
28
5
6
21
7
D
A Solar panel
B DHW circulation pump
VITOSOL
DHW loading with solar energy
Solar circuit pump 4 is switched ON and
the DHW cylinder is loaded, if a
temperature differential higher than the
start−up temperature differential DT
measured between collector temperature
sensor 2 and cylinder temperature
sensor 3.
T4A
230 V
50 Hz
N R2 N R1 N L
12 13 14 15 16 17 18 19 20
4
9
STB R2 R1
B
5
8
3
E
C DHW circulation output of the boiler
control unit or on−site time switch
4.1 System design 1
Pump 4 is switched OFF when:
H shutdown temperature differential DT
is no longer achieved
H the electronic temperature limit (safety
is
on
shutdown at 90 ºC) set at the control
unit or that set at the high limit safety
cut−out (if required) is exceeded.
The additional function requirements (see
page 60) are met by circulation pump 8.
2
A
4
VL RL
KW
D Oil and gas fired boilers
E DHW cylinder
with Vitosolic 100
off
61