Instruction of SR81 Split Pressurized Solar Hot Water System
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►Press “+/-”, to activate this function, “OHQM ON” displays
►Press “SET” or “ESC” to save the setting
►Press “+”, “FTYP 1” displays
►Press “SET”, “1” blinks
►Press “+/-”, to select type of flow meter
►Press “SET” or “ESC” to save the setting
►Press “+/-”, to activate this function, “OHQM ON” displays
►Press “SET” or “ESC” to save the setting
►Press “+”, “FTYP 1” displays
►Press “SET”, “1” blinks
►Press “+/-”, to select type of flow meter
（
1,2,3
）
►Press “SET” or “ESC” to save the setting
►Press “+”, “FMAX 6” displays
►Press “SET”, “6” blinks
►Press “+/-”, to adjust value of flow meter
►Press “SET” or “ESC” to save the setting
►Press “+”, “MEDT 3” displays
►Press “SET”, “3” blinks
►Press “+/-”, to select the fluid medium.
►Press “SET” or “ESC” to save the setting
►Press “+”, “MED% 45” displays
►Press “SET”, “45” blinks
►Press “+/-”, to adjust the concentration of fluid medium
►Press “SET” or “ESC” to save the setting
8.12 FS Flow meter option and flow rate monitoring
Under this menu, it is possible to set the on or off status of the flow meter (VFS, FRT) and set
its measuring range.
FLOW (Flow monitoring) function description
Flow monitoring function is designed to detect whether flow exists in the solar system and
therefore to switch-off the corresponding pump in case of no flow, It can protect system from
damage, e.g. to avoid pump dry running, and it keeps the system runs properly.
If relay R1 is powered, flow rate of flow sensor will be monitored. After a delay time section
(DELA), if no flow rate is detected, then solar pump R1 is ceased, and error message will
