Sunhome Tech SR1568 User Manual

Operation manual of solar controller SR1568
Page 21 of 87
System 7: Solar system with 1 collector field, 1 tank, 3-ways valve loading tank in
layers, loading the heating return
Description:
The controller calculates the temperature
difference between collector sensor T1 and tank
base and upper sensor T2, T3. 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 tank zone and this 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
upper zone of the tank.
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
Selectable sensor, free
R1
Solar circulation pump
T1
Temperature of collector
R4
3-ways valve for loading tank in
layers
T2
Temperature of tank base
R5
3-ways valve for preheating the
return water
T3
Temperature of tank upper
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