Sunhome Tech SR1568 - System 18: Solar System with East;West Collector Fields, 2 Tanks, Pump Switch Collector, Valve Switch Loading in Layers, Energy Transferring between 2 Tanks

Operation manual of solar controller SR1568
Page 32 of 87
System 18: Solar system with east/west collector fields, 2 tanks, pump switch
collector, valve switch loading in layers, energy transferring between 2 tanks
Description:
The controller calculates the temperature
difference between collector sensor T1, T0 and
sensor T2, T3 of tank 1. 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 zone, the corresponding
tank zone 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’s upper zone.
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 loading tank in
layers
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)