Instruction of SR91 Split Pressurized Solar Hot Water System
Page 23 of 49
8. Function operation and parameter setup (engineer)
8.1 PWD Password
Menu Structure
Access main menu, select “PWD 0000” to enter password
► Press “SET” button, the left digital blinks, enter password, factory set is “0000”
►Press “+/-”, to enter the first digital
►Press “SET”, the second digital blinks
►Press “+/-” to enter the second digital
►Press” SET”, the third digital blinks
►Press” +/-” to enter the third digital
►Press “SET”, the forth digital blinks
►Press “+/-” to enter the forth digital
►Press “SET”, to access main menu
Through password set to limit the user to change some parameters, 4 digitals needed.
Default is 0000
If no password is set, then just press “SET” five times to access main menu directly.
8.2 LOAD tank heating
Function description:
△
T control logic
The controller works as a standard temperature differential controller. If the temperature
reaches or exceeds the switch-on temperature difference (DTO), the pump R1 switches on.
When the temperature difference reaches or falls below the adjusted switch-off temperature
difference (DTF), the respective relay R1 switches off.
Note:
The switch-on temperature difference must be 0.5 K higher than the switch-off
