Manual of SR288 intelligent controller
46
controller.
3.
If select Grundfos sensor VFS to calculate heat quantity, firstly you should activate VFS
function under menu FS/GFDS (VFS ON), and select measurement range, default value
is 1-12L/min.
4.
Under FTYP menu to set the flow rate type to 2 (VFS)
Under menu
MEDT
and
MED%
to set the antifreeze type and concentration of the heat
transfer fluid
T6: temperature sensor on the flow pipe
TVFS: temperature sensor on the return pipe
If VFS is not connected correctly, sign blinks on the sensor
Thermal quantity measurement with rotary vane flow meter(FRT)
Under menu FTYP, set the flow type to 3(FRT)
The thermal quantity measurement uses the temperature
difference between flow sensor T6 and return sensor T5 and
the flow rate transmitted by the FRT flow meter.
Under menu
MEDT
and
MED%
to set the antifreeze medium
type and concentration of the heat transfer fluid
Note
: when rotary vane flow meter (FRT) is selected for thermal quantity calculation,
then it needs to activate FRT (FRT ON) under menu FS/FRT.
Menu structure
Menu
Submenu
1
Submenu
2
Factory
set
Adjustabl
e range
Step
per
adjust
Description
OHQM
OFF
ON/OFF
Thermal quantity
measurement