Sunhome Tech SR1568 User Manual

Operation manual of solar controller SR1568
Page 22 of 87
System 8: Solar system with east/west collector field, 1 tank, loading the heating
return
Description:
The controller calculates the temperature
difference between collector sensor T1, T0 and
tank base sensor T2. If any difference is larger
than or identical to the adjusted switch-on
temperature difference, then solar circulation
pump (R1 and /or R2) will be switched on, and
tank will be loaded until the switch-off
temperature difference or the maximum tank
temperature is reached.
Another temperature difference between heat
source T4 and heating return T5 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
Temperature of collector 2
R1
Solar circulation pump 1
T1
Temperature of collector 1
R2
Solar circulation pump 2
T2
Temperature of tank base
R4
3-ways valve for preheating the
return water
T3
Temperature of tank 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 upper for
loading the heating return
water (selectable)
R5
T5
Temperature of heating return
pipe
HR
Back-up heating
T6
Temperature for thermal
energy measurement
( selectable)

Sunhome Tech SR1568 Specifications

General

Brand	Sunhome Tech
Model	SR1568
Category	Controller
Language	English