Dimplex SOLCU Installation And Operating Instructions Manual page 24

System 2: 1 collector array – 1 storage tank –
heating return increase
Description of the solar function: The solar circuit pump R1 is switched
on as soon as the switch-on temperature difference between the collec-
tor array A1 (T1) and the storage tank B1 (T) is reached. When the
switch-off temperature difference between collector array A1 (T1) and
storage tank B1 (T) or a safety limit is reached, the solar circuit pump
R1 is switched off again.
Description of the heating return increase: The 3-way valve R in the
heating return is switched on (water flows through storage tank) as
soon as the switch-on temperature difference between the storage tank
B1 (T3) and the heating return (T4) is reached. When the switch-off tem-
perature difference (T3 – T4) is reached, the 3-way valve R returns to its
initial state. Water does not flow through the storage tank.
NOTE
When no voltage is on the system, the switching valve R must be set in
such a manner that water does not flow through the storage tank.
Loading strategy of solar circuit pump R1: In the factory, temperature
differential control is chosen as the loading strategy for the storage tank
B1. It can be adjusted or changed to target temperature control using
the "Parameters" menu (chapter 7.4 "Parameters").
Activating the system: see chapter 7.. "Selecting a system".
Terminal layout
N L N R1 N
n.c. n.c. n.c. n.c.
L L
n.c. n.c.
T1
T3
R1
4
R2 1 2 3 4 5
X
n.c.
D1
B1
T2 T4
R2
EN
 
Display: .1. Display: .1.
A1: collector array A1: collector array
B1: storage tank B1: storage tank
D1: wire bridge D1: wire bridge
R1: solar circuit pump R1: solar circuit pump
R: switching valve R: switching valve
heating return increase heating return increase
T1: collector sensor T1: collector sensor
T: lower area of storage tank T: lower area of storage tank
T3: sensor storage tank T3: sensor storage tank
heating return increase heating return increase
T4: sensor heating return increase T4: sensor heating return increase
730.138 | 08.1