Frost Protection; List Of Alarms; Technical Data - Grundfos PM 2 Montage- Und Betriebsanleitung

9. Frost protection

If the unit is subjected to frost in periods of inactivity,
the unit and the piping system should be drained
before the unit is taken out of operation.
The unit has no draining options and therefore must
be removed.
10.

List of alarms

Indication
"Alarm" is permanently on.
"Alarm" flashes once per
period.
"Alarm" flashes twice per
period.
"Alarm" flashes three times
per period.
"Alarm" flashes more than
three times per period.

11. Technical data

Data
Supply voltage
Contact load
Frequency
Maximum ambient temperature
Liquid temperature
p *
start
p **
stop
Q
min.
Time delay during stopping
Maximum operating pressure
Enclosure class
Volume of internal pressure tank
Dimensions
* The start pressure (p
start
** The stop pressure (p
stop
differential pressure.
The technical data may be limited by the pump data. See installation and operating instructions for the pump.
Alarm
Dry running.
Cycling.
Maximum operating
time.
Protection mode.
Internal fault.
) can be set in steps of 0.5 bar. The setting is described in section 5.1 DIP switches.
) is only used in systems with a pressure tank. See section 7.2 Start/stop with 1 bar
Cause
The pump has been running without water.
The pump is cycling.
Note: Occurs only if the anti-cycling function has
been enabled. See section 8.2 Anti-cycling.
The pump has been running continuously for
30 minutes.
Note: Occurs only if the function "maximum
continuous operating time (30 minutes)" has been
.
enabled See section 8.3 Maximum continuous
operating time (30 minutes).
The pump has had too many start/stop sequences
within a short period.
Each pump start is delayed a few seconds to
protect the installation. The start delay is active
until normal operation has been re-established.
Note: The protection mode will protect the
installation when the PM 2 is set to start/stop with
1 bar differential pressure, i.e. when DIP switch 5
is set to "ON". The protection mode functions
independently of the anti-cycling function.
Internal fault in the unit.
230 V model
1 x 230 V ± 10 %
10 A
50/60 Hz
+50 °C
0 °C to +40 °C
1.5 to 5 bar
P + 1 bar
start
1.0 litre/min.
10 seconds
PN 10 / 10 bar (1 MPa)
IP65
0.1 litre
See fig. C, page 194
115 V model
1 x 115 V ± 10 %
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