SR981S/SR982S operation manual of solar pump station
Page 28 of 85
System 9: East/West collector array + 2 tanks controlled by T-Valve logic
Description:
Controller compares the temperature between east/west collector array T0, T1 and T2 of
tank 1, T4 of tank 2, when temperature difference reaches its switch-on value ( T0,T1 and
T2 corresponding DT1O, T0,T1 and T4 corresponding DT2O), then P1,P2 are triggered,
and simultaneously, T-valve R1 switches its direction to the corresponding collector array
(and priority circuit is T1 collector array), they keeps running until tank temperature
reaches its maximum value or when temperature difference ( T0,T1 and T2 corresponding
DT1F; T0,T1 and T4 corresponding DT2F) drops to the switch-off value, then P1, P2, R1 is
ceased.
Input ports
Description
Output ports
Description
T0
Sensor of west collector array
T1
Sensor of east collector array
P1
Pump 1 for collector array
circuit
T2
Sensor on the bottom part of tank 1
R1
For T-valve
T3
Sensor on the top part of tank 1
H1
Back-up heat resource
T4
Sensor on the bottom part of tank 2
T5
Sensor on the top part of tank 2
P2
Pump 1 for collector array
circuit
T6
DHW sensor
R3
Pump for DHW circuit
T7
Sensor on the return pipe
T8
Sensor on the flow pipe( SR981S no)
