Dip Switches; Enabling The Dip Switch Settings - Grundfos PM Rain Installation And Operating Instructions Manual

5.1 DIP switches

The PM Rain has a number of settings which can be
made with the DIP switches behind the control panel.
See fig. 6.
OFF/ON OFF/ON
2.5 BAR 1
+ 0.5
2
+1.0 + 1.0
3 +1.0 +1.0
4 4 +1.0 +1.0
5 5 STOP = START + 1 STOP = START + 1 BAR
6 6 AUTO RESET
7 ANTI CYCLING ANTI CYCLING
8
Fig. 6 DIP switches
DIP switch
No. Name
1-4 START
5 STOP = START + 1 BAR
6 AUTO RESET
7 ANTI CYCLING
8 Not in use
8
START START
Description
Start pressure (p
With these DIP switches the start pressure can be set
from 2.5 bar (250 kPa) to 6.0 bar (600 kPa) in steps
of 0.5 bar (50 kPa).
Example:
DIP switch 1 = "ON"
DIP switch 2 = "ON"
Start pressure = 2.5 + 0.5 + 1 = 4 bar
Start pressure = 250 + 50 + 100 = 400 kPa
See section 7.2.1 Starting and stopping conditions.
Start/stop with 1 bar (100 kPa) differential
pressure
(This operating mode is only suitable for systems with
a pressure tank).
When the DIP switch has been set to "ON", the pump
stop pressure will be equal to p
See section 7.3 Start/stop with 1 bar (100 kPa)
differential pressure.
In systems without a pressure tank, the DIP switch
must be set to "OFF".
Automatic resetting of warnings
When the DIP switch has been set to "ON",
the cycling and dry-running warnings will
automatically be reset if they have been activated.
See section 8.2.3 Resetting of dry-running warning.
Anti-cycling
When the DIP switch has been set to "ON",
the "Warning" indicator light will illuminate if cycling
occurs. See section 8.1 Anti-cycling.

5.2 Enabling the DIP switch settings

When the desired DIP switch settings have been
made, they must be enabled, otherwise the PM Rain
cannot detect the settings.
To enable the DIP switch settings, press [Reset] or
disconnect and reconnect the power supply to the
unit.
)
start
+ 1 bar (100 kPa).
start
Default setting
All set to OFF
p = 2.5 bar
start
p = 250 kPa
start
OFF
(start/stop according
to water
consumption)
ON
(manual resetting)
OFF