Potterton eurocondense four 125 kw, Installation, Operation And Maintanance Manual, Page: 101 / 148

9.2.13 Solar
Temp diff on (3810) and Temp diff off (3811)
1 / 0 On / off collector pump
T Temperature
T1 Temp diff on
T0 Temp diff off
TK Collector temperature
TL Charging temperature min buffer storage tank / swimming pool
TS Storage tank temperature
t Time
The switching-on and switching-off point of the collector pump is set with
these functions. Basis is the temperature difference between collector
temperature and storage temperature.
Charg temp min HW st tank (3812)
In addition to the temperature difference, reaching a certain minimum col­
lector temperature is necessary for the storage charging process.
Temp diff on buffer (3813),Temp diff off buffer (3814)
andCharging temp min buffer (3815)
The switching-on and switching-off point of the collector pump is set with
these functions. Basis is the temperature difference between collector
temperature and storage temperature of the buffer storage tank.
In addition to the temperature difference, reaching a certain minimum col­
lector temperature is necessary for the buffer storage charging process.
Temp diff on swi pool (3816) andTemp diff off swi pool (3817)
The solar circuit pump starts or stops if the difference between the solar
collector temperature and the swimming pool temperature is exceeded or
undershot.
Charging temp min swi pool (3818)
Temperatures that the collector must have at the least in order to begin
charging a swimming pool.
Charging prio storage tank (3822)
If several heat exchangers/indirect coils are tied into the system, the heat­
ing sequence for the connected cylinders can be determined by setting the
heating process.
None: Every storage tank is charged alternately with a temperature in­
crease of 5 °C, until the setpoint has reached level A, B or C (tab. 1).
Once all setpoints have been reached, the setpoints of the next level are
applied.
Hot water storage tank: The DHW storage tank is charged as priority
during any heating with solar energy at any level (A, B or C). Other con­
sumers with the same level will only be charged afterwards. Once all
setpoints have been reached, the setpoints of the next level are applied.
For this, heating the DHW cylinder still takes priority.
Buffer storage tank: During any heating with solar energy, the buffer
storage tank is charged first at any level (A, B or C). Other consumers
with the same level will only be charged afterwards. Once all setpoints
have been reached, the setpoints of the next level are applied. For this,
charging the buffer cylinder still takes priority.
Tab.10 Storage tank setpoints
Lev­
el
Domestic water stor­
age tank
Buffer storage tank Swimming pool
(1)
A Nominal value
(prog. no. 1610)
Buffer setpoint
(drag-pointer)
Setpoint solar heat­
ing
(prog. no. 2055)
Fig.39 Charging control /schematic)
TK
T1
T2
TL
1
0
TS
RA-0000080
T
t
9 Settings
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