Sunhome Tech SR1568 User Manual

Operation manual of solar controller SR1568
Page 35 of 87
System 21: Solar system with 1 collector field, 2 tanks, valve switch loading tank,
preheating return of heating system
Description:
The controller calculates the temperature
difference between collector sensor T1 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 solar circulation
pump (R1) 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 T5 and heating return T6 can be used to
control the 3-ways valve R5 to preheat the return
water of heating system by the solar system.
Sensor
ports
Description
Relay
outputs
Description
T0
Selectable sensor, free
R1
Solar circulation pump
T1
Temperature of collector
R4
3-ways valve for switch the tank
T2
Temperature of tank 1 base
R5
3-ways valve for preheating return
T3
Temperature of tank 1 upper
( optional)
R2
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
R3
T5
Temperature of tank 2 upper
for preheating return
HR
Back-up heating
T6
Temperature for heating return
pipe

Sunhome Tech SR1568 Specifications

General

Brand	Sunhome Tech
Model	SR1568
Category	Controller
Language	English