Sunhome Tech SR1568 - System 12: Solar System with 1 Collector Field, 2 Tanks, Pump Switch Loading Tank

Operation manual of solar controller SR1568
Page 26 of 87
System 12: Solar system with 1 collector field, 2 tanks, Pump switch loading tank
Description:
The controller calculates the temperature
difference between collector sensor T1 and tank
sensor T2, T4. If any difference is larger than or
identical to the adjusted switch-on temperature
difference, then the corresponding solar
circulation pump (R1 and/ or R2) will be
switched on, and corresponding tank will be
loaded until the switch-off temperature
difference or the maximum tank temperature is
reached.
The priority logic effects prior loading of the tank
1.
Sensor
ports
Description
Relay
outputs
Description
T0
Selectable sensor, free
R1
Solar circulation pump 1
T1
Temperature of collector
R2
Solar circulation pump 2
T2
Temperature of tank 1 base
R3
Available selectable functions:
1.CIRC（DHW circulation）
2.OHDP（Thermal transfer）
3.SFB（Solid fuel boiler）
4.BYPR （ Circulation by-pass ）
5.TIMER（Timer function）
6.OPARR（Parallel relay）
T3
Temperature of tank 1 upper
( selectable)
R4
T4
Temperature of tank 2 base
R5
T5
Selectable sensor, free
HR
Back-up heating
T6
Temperature for thermal
energy measurement
( selectable)