19
4.1.2.2
Internal heat exchanger, 1 storage tank, 2 collector arrays, pump control
If, in the 'System selection'
menu,
the points
"intern. heat exchanger",
"1 storage tank",
"2 collectors" and
"Basic P" are selected, the
hydraulic diagram
illustrated here is available
for use as a basic system
with the indicated variants.
•
"Basic P" system: The regulator constantly records the differential temperature between the
sensors T1 and T3 or T2 and T3. Depending on for which collector array the switch-on differential
temperature (parameter: 'diff. temp. solar1 ON' or 'diff. temp. solar2 ON') is first reached, either
solar circuit pump R1 is switched on for collector array 1 or solar circuit pump R2 for collector array
2. When the storage is charged, it is also checked if the switch-on differential temperature of the
inactive collector array has also been reached. If this is the case, this solar circuit will also be
switched on. In the event the temperature falls below the switch-off differential temperature
(parameter: 'diff. temp. solar1 OFF' or 'diff. temp. solar2 OFF') the corresponding pump is switched
off. If the storage tank reaches its set maximum storing temperature (parameter: 'storage max.')
both solar circuit pumps are switched off.
Depending on the setting (parameter -> speed control -> R1 und -> R2), the solar pump’s speed
control maintains the differential temperature between 'collector' (T1 or T2) and 'lower part of the
storage tank’ (T3) constant at the value of the parameter 'diff. temp. solar ON' or the absolute
temperature of the 'collector' (T1 or T2) constant at a fixed temperature of 70°C.
The additional functions shown (circulation and the two after-heating systems) are not activated.
•
Add-on
"
- Ci": Output R3 and the T4 temperature sensor can also provide a control of a circulation
pump for the warm water cycle. A detailed functional description of the add-on with further tips can
be found on page 14.
•
Add-on
"
- AH": R4 and T5 combined with an oil or gas boiler can provide after-heating. A detailed
functional description of this add-on can be found on page 15.
•
Add-on
"
- SFH": With the help of R3, T4 and T5 after-heating is also possible considering the
boiler temperature (required, for example, when burning solids). A detailed functional description of
this add-on works can be found on page 15.
•
"Basic P - R" diagram: In some cases the solar circuit pump needs to be controlled according to
the solar radiation. For this purpose the radiation sensors S6 and S7 must be installed in the
corresponding collector levels. For control reasons, T1 must be inserted between the collector’s
collection point and bypass. The temperature sensor T2 is not required.
A functional description of
this add-on can be found on page 15.
collector
field 1
collector
field 2
R4
T5
oil,
gas
Basic
-AH
T4
R3
Basic
-Ci
alternative radiation sensor for BasicP-R
T4
T5
R3
solid
fuel
Basic
-SFH
R4
Bypass for BasicP-R
M
M
R3
S6
S7
