Sunhome Tech SR1568 - System 17: Solar System with 1 Collector Field, 2 Tanks, Pump Switch Loading Tank, Thermal Energy Transferring between 2 Tanks

Operation manual of solar controller SR1568
Page 31 of 87
System 17: Solar system with 1 collector field, 2 tanks, pump switch loading tank,
thermal energy transferring between 2 tanks
Description:
The controller calculates the temperature
difference between collector sensor T1 and tank
1/2‘s sensor T2 or T4. If the 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, the 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.
Another temperature difference between heat
source T3 of tank 1 and T4 of the object tank 2
can be used to control the pump R3 to load the
tank 2.
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
Pump for heat transferring
T3
Temperature of tank 1 upper
R4
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)