Sunhome Tech SR1568 User Manual

Operation manual of solar controller SR1568
Page 23 of 87
System 9: Solar system with east/west collector fields, 1 tank, 3-ways valve switch
collector, 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) will be switched on,
and simultaneously valve R4 turns to the
corresponding collector and this 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
T1
Temperature of collector 1
R4
3-ways valve for collector switch
T2
Temperature of tank base
R5
3-ways valve for preheating the
return water
T3
Temperature of tank upper
( selectable)
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 upper for
loading the heating return
water (selectable)
R3
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