SR981S/SR982S operation manual of solar pump station
Page 27 of 85
System 8: East/West collector array + 1 tank controlled by T-Valve logic
Description:
Controller compares the temperature of east/west collector array T0, T1 and tank
temperature T2, when temperature difference reaches its switch-on value (DT1O), then P1
is 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 drops to the
switch-off value, then P1, 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
R1
For T-valve
T3
Sensor on the top part of tank
H1
Back-up heat resource
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
Paragraph 8.5.2)
Above mentioned auxiliary functions should be activated in menu in advance.