Sunhome Tech SR1568 - System 13: Solar System with East;West Collector Fields, 2 Tanks, 3-Ways Valve Switch Loading Tank

Operation manual of solar controller SR1568
Page 27 of 87
System 13: Solar system with east/west collector fields, 2 tanks, 3-ways valve switch
loading tank
Description:
The controller calculates the temperature
difference between collector sensor T1, T0 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 simultaneously valve R4 turns
to the corresponding tank 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
Temperature of collector 1
R1
Solar circulation pump 1
T1
Temperature of collector 2
R2
Solar circulation pump 2
T2
Temperature of tank 1 base
R4
3-ways valve for loading tank
switch
T3
Temperature of tank 1 upper
( selectable)
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）
T4
Temperature of tank 2 base
R5
T5
Selectable sensor, free
HR
Back-up heating
T6
Temperature for thermal
energy measurement
( selectable)