Pump; Engine; Controller - Grundfos Fire NKF Montage- Und Betriebsanleitung

4.1.1 Pump

The pumps of the pump unit are non-self-priming, single-stage
Grundfos NKF standard pumps with spiral housing. The pumps
have an axial suction port and a radial discharge port with PN 10
or PN 16 flanges according to EN 1092-2.
The NKF pumps are available in these models:
Model A
NKF 200-500.
Model B
NKF 50-200, NKF 65-200, NKF 80-200, NKF 80-250,
NKF 150-400, NKF 150-500.
The impeller diameter can be reduced to customise the pump
performance to a certain duty point. The actual impeller diameter
may therefore deviate from the standard diameters stated in
catalogues, data sheets etc. The actual impeller diameter is
stated on the pump nameplate.
The NKF pump is equipped with a rubber bellows seal, type
BAQE, with sealing faces of metal-impregnated carbon/silicon
carbide. The elastomer parts are of EPDM.
NKF pumps are approved by VdS for use in fire
Note
systems.

4.1.2 Engine

The pumps are driven by a stationary 4-stroke diesel engine from
John Deere which has been especially adapted to meet the
requirements of fire pumps.
The nominal engine power is adapted to the power requirement
of the pump. The adaptation is via the engine speed, which may
therefore not be changed. The table shows the relationship
between the diesel engines to the individual pumps. Depending
on output, the engines have a turbocharger and, if necessary,
also a charge air cooler.
Pump type
Fire NKF 50-200
Fire NKF 65-200
Fire NKF 80-200
Fire NKF 80-250
Fire NKF 150-400
Fire NKF 150-500
The injection pump has been set from factory,
Caution
and the setting must not be changed.
The engine is cooled via a heat exchanger. The cooling liquid is
led to the heat exchanger via a pipe connected to the discharge
port of the pump. The discharge from the heat exchanger is led
via an open outlet according to VdS regulations.
The engines meet the requirements of VdS.
Note

4.1.3 Controller

The pump unit is controlled via a Minimax controller especially
sized for diesel engines driving fire pumps. The purpose of the
PLC controller is to start the pump automatically and monitor the
diesel engine.
As soon as the sprinklers are activated due to an alarm and water
is consumed, the pressure in the discharge pipe is reduced. If the
pressure becomes lower than the start pressure set at the
pressure switch, the pump starts automatically.
The pump is stopped manually via the controller.
General construction
The controller is in a control cabinet mounted on the base frame.
The controller is operated by means of the control panel in the
cabinet door. See fig. 9. The control cabinet supplies the engine
with the power required for starting and operating the engine. If
the power supply fails, the two redundant starter sets take over
this task.
Engine type
JU4H-NL14
JU4H-NL14
JU4H-NL14
JU4H-NL24
JU4H-NL24
JU4H-NL34
JU4H-NL50
JU6H-NL30
JU6H-NL50
JU6H-NL60
JW6H-NL30
JU6H-NL60
JW6H-NL30
JW6H-NL40
H10
H12
H13
H14
H15
H17
H18
H19
H20
H21
H22
H23
H24
The controller has a VdS approval for use in fire
Note
systems.
H1 H4
H2 H5
H3 H6
Dis.
H7 H9
H8 H10
H11 H16
H12 H17 S1
H13 H18
H14 H19 S2
H15 H20 H0
S3
H21 H23
H22 H24 S4 S6
BS1
P8
V A
xxxxx
P4 P5
Fig. 9 Control panel
Indicator lights on control panel
Description
H1 Green Fire pump operation
H2 White Fire pump stopped
H3 Yellow Common fault
H4 Green Processor on
H5 Green Blinds, air in, open
H6 Green Blinds, air out, open
H7 Green Pressure switch 1 triggered
H8 Yellow Pressure switch 1 fault
H9 Green Pressure switch 2 triggered
Yellow Pressure switch 2 fault
H11 Green Starting/ready
Red Error start
Red Diesel auto-start locked
Yellow Battery set 1 fault
Yellow Battery set 2 fault
H16 Green Motor monitoring on
Red Oil pressure low
Red Overtemperature
Red Fuse blown
Yellow Electric generator dropped out
Red Fuel tap closed
Yellow Transmission path fault
Red Fuel shortage
Yellow Transmission path fault
P1
XXXXXXX
S5 S7
P2 P3
BS2
V A
P6 P7
9