Operation manual of solar controller SR658
Page 87 of 105
2: Ethylene glycol
3: Tyfocol LS / G-LS
Heat quantity measurement with Groundfos Direct Sensor VFS:
The heat quantity measurement uses the temperature
difference between flow sensor T7 and return sensor
TVFS and the flow rate transmitted by the VFS sensor.
TVFS: Groundfos Direct sensor VFS
Note:
Sensor of flow and return pipe for heat quantity
measurement is default set in every system, it cannot be set.
Flow checking function is only available when a VFS type Grundfos Direct Sensor is
connected to the system.
If Grundfos sensor VFS is select for calculating heat quantity, firstly you should
activate VFS function under menu FS/GFDS, and select measurement range,
default value is 1-12L/min.
Under menu FTYP to set flow rate type 2 (VFS)
Select the antifreeze type and concentration of the heat transfer fluid under menu
MEDT
and
MED%
.
T7
：
temperature sensor of flow pipe
TVFS: temperature sensor of return pipe
If VFS sensor is not correct to be connected to the controller, icons will blinks
on the screen
Heat quantity measurement with Rotary blade flow Meter FRT
Under menu FTYP to set flow rate type 3 (FRT)
The heat quantity measurement uses the temperature
difference between flow sensor T7 and return sensor
T6 and flow rate transmitted by the flow meter FRT
Select the antifreeze type and concentration of the
heat transfer fluid under menu
MEDT
and
MED%
.
Note:
If Rotary blade flow Meter FRT is selected for calculating heat quantity, firstly you
should activate FRT function under menu FS/FRT
