29
4.1.5
Internal heat exchanger, 3 storage tanks, 1 collector array
4.1.5.1
Internal heat exchanger, 3 storage tanks, 1 collector array, valve control
If, in the 'System
selection' menu, the
points
"intern. heat exchanger",
"3 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" diagram: The regulator constantly records the differential temperature between the
sensors T1 and T2, T1 and T3 or T1 and T4. If the set switch-on differential temperature
(parameter: 'diff. solar ON') is reached by one of the differential temperatures, pump R1 switches
on and the 3-way valves R2 and R3 are 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 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 a storage tank with lower
priority is met, the 3-way valves are switched to charge the corresponding storage tank. When a
secondary storage tank is charged it is checked, at regular intervals (“storage tank priority...” ->
“Test interval”), whether a storage tank with higher priority can be charged again. For this purpose
the solar circuit pump is deactivated for a short period (“storage tank priority...” -> “Test period”). If
a storage tank with higher priority reaches its switch-on temperature within this period, this will be
charged.
Depending on the setting (parameter -> speed control -> R1), the solar pumps speed control
maintains the differential temperature between 'collector' (T1) and 'lower part of the storage tank'
(T2, T3 or T4) 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 R2 is in a de-energized state!
Storage tank 2 is charged when the 3-way valve R3 is in a de-energized state (R2
is energized)!
The additional functions shown (circulation and after-heating) are not activated.
•
Add-on
"
- Ci": Output R4 and the T5 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.
T5
R4
Basic
-Ci
R4
T5
oil,
gas
Basic
-AH
T1
or S6 (radiation sensor) for BasicV-R
R4
M
Bypass
for
BasicV-R
