Viessmann Vitosol 100-FM Technical Manual page 30

Solar control units
Interval function
Activate the interval function in systems where the collector tempera-
ture sensor is not in an ideal location to prevent a time delay in cap-
turing the collector temperature.
Cooling function in Vitosolic 200 (only in systems with one con-
sumer)
Function for dispersing excess heat. When the set cylinder tempera-
ture and start temperature differential are reached, the solar circuit
pump and relay R3 are switched on and then off when the actual
temperature falls below that of the stop temperature differential.
Frost protection
Viessmann collectors are filled with Viessmann heat transfer
medium. This function does not have to be enabled.
Activate only when using water as heat transfer medium.
■ Solar control module
With a collector temperature below +5 ºC, the solar circuit pump
will be started to avoid damage to the collectors. The pump will be
stopped when a temperature of +7 ºC has been reached.
■ Vitosolic 100 and Vitosolic 200
With a collector temperature below +4 ºC, the solar circuit pump
will be started to avoid damage to the collectors. The pump will be
stopped when a temperature of +5 ºC has been reached.
Thermostat function with solar control module and Vitosolic
100
The thermostat function can be used independent of the solar opera-
tion.
Different effects can be achieved by determining the thermostat start
and stop temperatures:
■ Start temperature < stop temperature:
e.g. reheating
■ Start temperature > stop temperature:
e.g. utilisation of excess heat
Start temperature (40 ºC) and stop temperature (45 ºC) can be
changed.
Start temperature setting range: 0 to 89.5 ºC
Stop temperature setting range: 0.5 to 90 ºC
Vitosolic 200 thermostat function, ΔT control and time switches
If relays are not assigned standard functions, they can be used, for
example, for function blocks 1 to 3. Within a function block, there are
4 functions that can be combined as required.
6
■ 2 thermostat functions
■ Differential temperature control
■ Time switch with 3 periods that can be enabled
The functions within a function block are linked so that the conditions
for all enabled functions must be met.
Thermostat function
Different effects can be achieved by determining the thermostat start
and stop temperatures:
■ Start temperature < stop temperature:
e.g. reheating
■ Start temperature > stop temperature:
e.g. utilisation of excess heat
Start temperature (40 ºC) and stop temperature (45 ºC) can be
changed.
Setting range for the start and stop temperatures: −40 to 250 ºC
ΔT controls
The corresponding relay switches ON if the start temperature differ-
ential is exceeded and OFF if the stop temperature is not achieved.
VIESMANN
30
(cont.)
Time switch
The corresponding relay switches ON at the start-up time and OFF
at the shutdown time. (3 time frames may be enabled).
Speed control with solar control module
The speed control is disabled in the delivered condition. It can only
be enabled for relay output R1.
Possible pumps:
■ Standard solar pumps with and without their own speed control
■ High efficiency pumps
■ Pumps with PWM input (only use solar pumps), e.g. Grundfos
pumps
Note
We recommend operating the solar circuit pump at max. output while
the solar thermal system is being vented.
Vitosolic 100 speed control
The speed control is disabled in the delivered condition. It can only
be enabled for relay output R1.
Possible pumps:
■ Standard solar pumps with and without their own speed control
■ High efficiency pumps
■ Pumps with PWM input (only use solar pumps), e.g. Wilo or
Grundfos pumps
Note
We recommend operating the solar circuit pump at max. output while
the solar thermal system is being vented.
Vitosolic 200 speed control
The speed control is disabled in the delivered condition. It can only
be enabled for relay outputs R1 to R4.
Possible pumps:
■ Standard solar pumps with and without their own speed control
■ High efficiency pumps
■ Pumps with PWM input (only use solar pumps), e.g. Wilo or
Grundfos pumps
Note
We recommend operating the solar circuit pump at max. output while
the solar thermal system is being vented.
Heat statement with solar control module and Vitosolic 100
When determining thermal yields, the difference between the collec-
tor and cylinder temperature, the set throughput, the type of heat
transfer medium and the operating time of the solar circuit pump are
taken into account.
Vitosolic 200 heat statement
The statement can be produced with or without the volumeter.
■ Without volumeter
through the temperature differential between the heat meter flow
and the heat meter return temperature sensor and the selected
throughput
■ With volumeter (heat meter, accessory for the Vitosolic 200)
through the temperature differential between the heat meter flow
and the heat meter return temperature sensor and the throughput
captured by the flow meter
Existing sensors can be used, without affecting their function in the
relevant system scheme.
Suppression of DHW cylinder reheating by the boiler with solar
control module
DHW cylinder reheating by the boiler is suppressed in 2 stages.
While the DHW cylinder is being heated by solar energy, the set cyl-
inder temperature is reduced. After the solar circuit pump has been
switched off, suppression remains active for a certain time.
VITOSOL