SUNFLOWER SR81 User Manual

Instruction of SR81 Split Pressurized Solar Hot Water System
Page 11 of 48
Sensor
ports
Description
Relay
outputs
Description
T1
Collector temperature
sensor PT1000
R1
For solar circuit pump
T2
Temperature sensor on the
bottom part of tank.
NTC10K
R2
1. for DHW circuit function
（CIRC）
2.OHDP （ Thermal energy
transferring, R2,R3 can be
selected）
T3
Temperature sensor on the
upper part of tank. NTC10K
T4
Temperature sensor on
DHW Pipe. NTC10K
R3
1.TIME（Timer function）
2.AH（Automatic thermostat
function
T5
Temperature sensor for
thermostat function
NTC10K
HR
For back-up heating
1. Note: when R3 output is selected for OHDP function, other two functions AH, TIME will
be closed automatically. When one of these three functions (HEAT, OHDP, SFB) is
activated, and then the other two will be deactivated automatically.
5. Time setup
Before switch-on the power, please connect sensor on the inputs terminal, connect
pump or on/off valve on the outputs terminal. After the power is switched-on, you can set the
time, password and parameters of system.
► Press “Clock” button, Time displays on the screen,
hour “00” blinks on the display.
► Press “+/-” button, to adjust hour
► Press “Clock” button again, minute time “00” blinks on the display
► Press “+/-” button to adjust minute
► Press “ESC” button to save the set value
Note: In the case power to controller is switched-off, date and time will be memorized
in controller for 36 hours.

SUNFLOWER SR81 Specifications

General

Brand	SUNFLOWER
Model	SR81
Category	Controller
Language	English