21
4.1.3
Internal heat exchanger, 2 storage tanks, 1 collector array
4.1.3.1
Internal heat exchanger, 2 storage tanks, 1 collector array, valve control
If, in the 'System selection'
menu,
the points
"intern. heat exchanger",
"2 storage tank",
"1 collector" and
"Basic V" are selected, the
hydraulic diagram
illustrated here is available
for use as a basic system
with the indicated variants.
•
"Basic V" system: The regulator constantly records the differential temperature between the
sensors T1 and T2 or T1 and T3. If the set switch-on differential temperature (parameter: 'diff.
temp. solar ON') is reached by one of the differential temperatures, the pump R1 is switched on
and the 3-way valve R2 is switched so that the corresponding storage tank is charged. If the
storage tank currently about to be charged is the first storage tank on the storage tank priority list
(parameter -> storage tank priority...), this is charged until it reaches its maximum storing
temperature (parameter: 'storage tank x max.') or falls below the switch-off differential temperature
(parameter: 'diff. temp. solar OFF'). Then, if the switch-on condition of the second storage tank is
met, the 3-way valve is switched to this storage tank. When the secondary storage tank is charged
the storage tank priority (“storage tank priority...” -> “Test interval”) is checked, at regular intervals,
if it can be charged again. For this purpose the solar circuit pump is deactivated for a short period
(“storage tank priority...” -> “Test period”). If the priority storage tank reaches its switch-on
temperature within this period, this will be charged again.
Depending on the setting (parameter -> speed control -> R1), the solar pump’s speed control
maintains the differential temperature between 'collector' (T1) and 'lower part of the storage tank’
(T2 or T3) at the value of the parameter ‘diff. temp. solar ON' or the absolute temperature of the
'collector' (T1) constant at a fixed temperature of 70°C.
Definition: Storage tank 1 is charged when the 3-way valve is in a de-energized state!
The additional functions shown (circulation and after-heating) 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.
•
"Basic V - R" diagram: In some cases the solar circuit pump must be controlled according to the
solar radiation. For this reason, a S6 radiation sensor must be installed in the collector level. For
control purposes T1 must be inserted between the collector and bypass. A detailed functional
description of this add-on can be found on page 15.
or S6 (radiation sensor) for BasicV-R
R4
T5
oil,
gas
Basic
-AH
T4
R3
Basic
-Ci
R3
M
Bypass
for
BasicV-R
