Viessmann Vitosol100 - H Dual Mode DHW Heating with Two DHW Cylinders, with Vitosolic 200

4.3System design3
68
VITOSOL
4.3 System design3
Dual mode DHW heating with two DHW cylinders with Vitosolic 200
(particularly suitable for retrofitting in existing systems)
DHW heating without solar energy
DHW cylinder2 is heated by the boiler.
The cylinder thermostat with cylinder
temperature sensor6 of the boiler
control unit switches the cylinder loading
pump7.
DHW circulation pumpß (if installed) is
switched ON and relayering pumpß is
switched OFF to ensure that DHW
circulation takes place only via DHW
cylinder2.
DHW with solar energy
Solar circuit pump 4 is switched ON and
DHW cylinder1 is loaded, if a
temperature differential higher than
start−up temperature differential T
on
is
measured between collector temperature
sensor 2 and cylinder temperature
sensor3.
Pump 4 is switched OFF when:
H the actual temperature falls below
shutdown temperature differential T
off
H the electronic temperature limit (safety
shutdown at 90 ºC) set at the control
unit or that set at the high limit safety
cut−out (if required) is exceeded.
Relayering pumpß is started, if the
temperature differential between sensors
9 and qP is greater than the start−up
temperature differential T6
ON
or DHW
loading in conjunction with the auxiliary
function has been enabled (see page60);
the pump will be switched OFF, if the
actual temperature falls below shutdown
temperature differential T6
OFF
or if the
auxiliary function is terminated.
The DHW circulation covers both DHW
cylinders. This feeds the water heated in
DHW cylinder1 into DHW cylinder2. This
way, DHW cylinder2 is also heated by
solar energy.
DHW circulation pumpß (if installed) for
DHW cylinder2 is controlled by the boiler
control unit.
5822135 GB
8b
8a
8a
8b