SR981S/SR982S operation manual of solar pump station
Page 24 of 85
System 5: 2 tanks controlled by thermal enegy transfer logic
Description:
Controller compares the T1 temperature of collector and T2 temperature of tank 1, when
this temperature difference reaches its switch-on value, then pump P1 is switch-on to heat
tank, until tank 1’s temperature reaches to its preset maximum value, or when temperature
difference drops to the preset switch-off value, then P1 is ceased.
Another temperature difference between T1 and T4 (corresponding DT2O, DT2F) controls
the pump P2, to transfer the stored thermal energy from tank1 to tank 2.
See 8.4.8/8.4.9 items to know detailed operations.
Input ports
Description
Output ports
Description
T1
Sensor of Collector
P1
Pump 1 for tank 1’s solar circuit
T2
Sensor on the bottom part of tank 1
P2
Pump 2 for thermal energy
transfer from tank 1 to tank2
T3
Sensor on the top part of tank 2
H1
Back-up heat resource
T4
Sensor on the bottom part of tank 2
T6
DHW sensor
R3
Pump for DHW circuit
T7
Sensor on the return pipe
T8
Sensor on the flow pipe( SR981S no)
List of available auxiliary functions in this system (functions are selectable)
Input ports
Description
Output ports
Description
R1
(COOL) tank cooling function
T5
Sensor on the solid fuel boiler
R2
Pump for solid fuel boiler(See
Paragraph 8.5.2)
Above mentioned auxiliary functions should be activated in menu in advance.
