Operation manual of solar controller SR658
Page 34 of 105
Sensor Description
Relay Description
T0
Temperature of solid fuel boiler
R1
Pump for tank heat transferring
T2
Temperature of tank 1 base
R2
Solid fuel boiler pump
R3
CIRC
（
DHW circulation
）
T3
Temperature
of
tank
1
upper(Optional)
R4
TIMER (Timer heating)
T4
Temperature of tank 2 base
R5
Thermostat function
T5
Temperature
of
tank
2
upper(Optional)
HR
Back-up heating
T6
Sensor for DHW temperature or
for flow switcher (optional)
System 19: System with 1 tank, heating return and solid fuel boiler
Description:
Temperature between heat source T4 and heating return T5 is deigned to trigger valve R4.
solid fuel boiler function is designed to transfer the thermal energy from solid fuel boiler to
tank.
Please refer the Paragraph of "RPH Heating return pipe preheat"
Please refer the Paragraph of "AUX Auxilary function"
Sensor Description
Relay Description
T0
Temperature of solid fuel boiler
R1
Solid fuel boiler pump
T2
Temperature of tank base
R2
TIMER (Timer heating)
R3
CIRC
（
DHW circulation
）
T3
Temperature
of
tank
upper(Optional)
R4
Valve of heating return
T4
Temperature of tank middle for
heating return (Optional)
R5
Thermostat function
