Sunhome Tech SR1568 - System 20: Solar System with East;West Collector Fields, 2 Tanks, Valve Switch Loading Tank, Thermal Energy Transferring between 2 Tanks

Operation manual of solar controller SR1568
Page 34 of 87
System 20: Solar system with east/west collector fields, 2 tanks, valve switch loading
tank, thermal energy transferring between 2 tanks
Description:
The controller calculates the temperature
difference between collector sensor T1, T0 and
sensor T2 of tank 1, T4 of tank 2. 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, the 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
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
R3
Pump for heat transferring
T3
Temperature of tank 1 upper
R4
3-ways valve for switch the tank
T4
Temperature of tank 2 base
R5
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）
T5
Selectable sensor, free
HR
Back-up heating
T6
Temperature for thermal
energy measurement
( selectable)