SR981S/SR982S operation manual of solar pump station
Page 32 of 85
Input ports
Description
Output ports
Description
T1
Sensor of collector array
P1
Pump 1 for collector array circuit
T2
Sensor on the bottom part of tank
P2
Pump 2 for heat exchanger
T3
Sensor on the top part of tank
H1
Back-up heat resource
T4
Sensor on the heat exchanger
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
T5
Sensor on solid fuel boiler
R2
Pump for solid fuel boiler (See
Paragrpaph 8.5.2)
Above mentioned auxiliary functions should be activated in menu in advance.
System 13: 2 tanks controlled by T-valve logic + T-valve for return heating
Description:
Controller compares the temperature between T1 of collector array and T2 of tank 1 or T4
of tank 2, when temperature difference reaches its switch-on value (T1&T2 corresponding
DT1O, T1&T4 corresponding DT2O), then pump P1 is triggered, and simultaneously,
T-valve switches to its direction to heat the corresponding tank, tank is heated until tank
temperature reaches its maximum value or when temperature difference (T1&T2
corresponding DT1F) or ( T1&T4 corresponding DT2F) drops to the switch-off value, then
P1,R1 are ceased.
Tank priority logic will decide to heat tank1 firstly.
Another temperature difference between T5 and T6 ( DT3O/DT3F) to control pump R2 to
heat the heating return by solar.
Note:
when T5 is not installed, then temperature difference between T4, T6 ( DT2O/DT2F)
is used to control T-valve R2
See detailed in 8.4.8/8.4.9
