en
64
Installation
Indications,
functions and options
Messages
Commissioning
Operation and function
16
GFDS 16
PUSH
VFS
Selection:
OFF / 1-12 / 2-40 / -100 / -200
(-100 = 5-100 | -200 = 10-200)
Factory setting: OFF
RPS
Selection: OFF / 0-10
Factory setting: OFF
16 Grundfos Direct Sensors™
In this menu the Grundfos Direct Sensors™ can be registered.
For Grundfos Direct Sensor™ positioning, see the system layout drawing on p.
63!
If Grundfos Direct Sensors™ are connected and registered, flow rate monitoring
OFLOW can be carried out during solar loading. For that purpose, the VFS sensor
must be installed in the solar flow. If no flow rate has been detected for 30 s, the
error message EFLOW is displayed in the status menu (see flow rate monitoring
option).
Note:
To deactivate a Grundfos Direct Sensor
TM
, the functions using this sensor
have to be deactivated first.
Flow rate monitoring
The Flow rate monitoring function can be used to detect malfunctions that impede
the flow rate. This will prevent system damage, e. g. through a dry run of the pump.
Note:
To deactivate the VFS or RPS sensor, the functions using this sensor have
to be deactivated first.
OFLOW
Flow rate monitoring option
Selection: ON / OFF
Factory setting: OFF
17 Pressure monitoring
Note:
The pressure monitoring function will only be available when an RPD
type Grundfos Direct Sensor™ is connected.
The Pressure monitoring function can be used for detecting overpressure or low
pressure conditions inside the system. This will prevent system damage.
Overpressure
If the system pressure exceeds the adjustable switch-on value, an error message
will appear.
When the pressure reaches or falls below the adjustable switch-off value, the mes-
sage disappears.
Note:
For the Overpressure monitoring function, the switch-on value has to
be adjusted at least 0.1 bar higher than the switch-off value. The adjust-
ment ranges will automatically adapt to that.
17
PRS 17
PUSH
17
OOVPR
Overpressure monitoring option
Adjustment range: OFF / ON
Factory setting: OFF
OVPRO
On at
Adjustment range: 0.6 … 6.0 bar
Factory setting: 5.5 bar
OVPRF
Off at
Adjustment range: 0.3 … 5.7 bar
Factory setting: 5.0 bar