Grundfos Fire DNF Installation And Operating Instructions Manual Download Page 10

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English (GB)

Monitoring of ambient temperature (option C7)

If a thermostat for measuring the room temperature is installed,
the optional control relay CR20 will be activated when the
temperature falls below a set temperature.

Monitoring of water reservoir level (option C10/C18)

The level in the water reservoir is monitored by two float switches
(low level and high level). If a low level is detected, the optional
control relay CR21 will be activated, provided option C10 has
been ordered.
If a high level is detected, the optional control relay CR40 will be
activated, provided option C18 has been ordered.

Monitoring of motor (option C11/C12)

If a motor temperature sensor is connected to terminals 89-90 via
a shielded cable, the optional control relay CR22 will be activated
in case of a high motor temperature.
If a vibration sensor is installed, the optional alarm relay CR23
will be activated in case of too strong vibrations indicating a motor
or pump fault.

Display texts

Most operating and alarm conditions can be shown as digital
texts in display D1.

Alarm panel (option B11b) and alarm bell (option D24)

The alarm panel provides an audible alarm and silence button for
motor run, phase reversal and phase failure.
An audible alarm for any optional digital text indication or alarm
relay is available as option. The alarm bell on the side of the
controller is also sounding when the isolating switch is in position
"OFF". During start-up, the audible alarm can be silenced for a
period of 15 minutes by pressing the silence button.

Recording of events and pressure data

The controller records events of the last 15 days and pressure
data of the last seven days. The information is accessible either
by using the USB port (standard, see section

12.4.1 Retrieving

data via the USB port

), or the printer (option D17A, see section

12.4.2 Printing of data

). A modem can be installed for remote

monitoring (option D25).

5. Settings

Settings are made via the two DIP switches and the menu in
display D2.

5.1 Settings via DIP switches

The following settings can be made via the two DIP switches:
• phase-reversal reference
• locking or unlocking of buttons [Cut-in] B3 and [Cut-out] B2 for

setting the cut-in and cut-out pressures.

The two DIP switches are located on the back of the cabinet door.
The configuration and factory settings are described below.

Setting of upper DIP switch

Phase-reversal reference (switch No 6)

If indicator light [Phase Reversal] is on, change the DIP switch
setting "ABC-CBA" to another setting using a pencil.

Setting of lower DIP switch

Unlocking or locking of buttons for setting of cut-in and cut-
out pressures (switch No 1)

When DIP switch "Lock-Unlock" is in position "ON", the buttons
[Cut-in] B3 and [Cut-out] B2 will be enabled. When DIP switch
"Lock-Unlock" is in position "OFF", setting of cut-in and cut-out
pressures is not possible.

5.2 Settings via display

13 menus give access to setting of several parameters:
• time and date, and time for automatic weekly test (menu 1)
• pressure unit (menu 2)
• timers (menu 3)
• pressure differential (menu 4)
• calibration of pressure sensor (menu 5)
• erase memory (menu 6)
• maximum pressure (menu 7)
• low system pressure (menu 8)
• high system pressure (menu 9)
• print (menu 10)
• pressure log (menu 11)
• event log (menu 12)
• status of inputs and outputs (menu 13).
The menus are listed in the order appearing in display D2.
Menus 4 to 9 are reserved for service staff and will be described
in the service instructions.

General procedure

• Press [Cut-in] button B3 (fig. 4) for more than 5 seconds to get

access to the setting menus. Keep the button pressed.

• To go to the next menu, press [Cut-out] button B2 (fig. 4)

repeatedly until the desired menu appears. Then release the
[Cut-in] button.

• To select a value, press [Cut-in] button B3.
• To set a value, press [Cut-out] button B2.
• To save the setting and return to the "normal" display, press

[Cut-out] button B2.

• If no button is touched for 30 seconds, the setting will not be

saved, and the display will return to normal mode.

Menu 1 (time and date, and time for automatic weekly test)

In the first line, the user can set time and date.
In the second line, the user can enable or disable a weekly test:
("WT : ON") / ("WT : OFF").

If a weekly test is enabled, "NEXT" will open a second window.

In the first line, the day of week for the test is set. In the second
line, the stop and start times are set.

Menu 2 (pressure unit)

In this menu, the user can select the unit of the displayed
pressure. The pressure can be displayed in bar or psi.

Inp 1

Do not change

Inp 2