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Solar control units
(cont.)
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 consumer)
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 tem-
perature 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.
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
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.
■ 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
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
Vitosolic 100 speed control
The speed control is disabled in the delivered condition. It can only be
enabled for relay output R1.
VITOSOL
■ 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 stop-
ped 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 stop-
ped when a temperature of +5 ºC has been reached.
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
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.
Time switch
The corresponding relay switches ON at the start-up time and OFF at
the shutdown time. (3 time frames may be enabled).
Note
We recommend operating the solar circuit pump at max. output while
the solar thermal system is being vented.
10
VIESMANN
43
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