Johnson Pump SPX FLOW F5B-19 12V DC Instruction Manual page 7

The motor's terminals have no pre-defined
polarity. The postive and negative leads may
be connected to either terminal.
If the pump is to be connected with a se-
parate grounded cable then the cable is to
be yellow and green in color and connected
to the foot of the pump. The negative lead
should be black.
Choose your cable dimensions according to
cable length as listed in the table.
NB! On installation electrical components
and eventual control systems must be dimen-
sioned for the motor's power consumption.
Underdimensioned components can cause
excessive heating and fires.
Switches, relays and fuses must be of
ignition-protected type.
Wiring scheme
C
D
1 Terminal fuse
2 Switch or circuit breaker
3 Pump
A Max 0.2 m
B Red
C Black
D Green/yellow
Electrical installation must be according to
ISO 10133.
Other electrical devices, eg switch, circuit
breaker, must be installed between the
pump and the positive (+) lead on the battery
(on the red wire).
Original instructions
A
2
1
3
Wiring table
(based on 3 % voltage drop at 1,5 bar
operating pressure)
Wire size
4 mm # 12 AWG
2
6 mm # 10 AWG
2
10 mm # 6 AWG
2
16 mm # 4 AWG
2
25 mm # 2 AWG
2
35 mm # 1 AWG
2
* The wire length is the total distance from the battery to
the pump and back to the battery. Use cord standing
moist environment.
When the pump is used as a bilge
pump
Max total head 7 m.
The pump must be installed so that the motor
is protected from splash from bilge water.
B
The pump must be fitted with a strainer or fil-
ter preventing debris from entering the pump.
Self-priming
Pump is self-priming up to 4 m. Intake lines
must be air-tight to ensure self-priming.
Note: Pump will prime when impeller is dry
but suction lift up to 4 m is only obtainable
when impeller is greased or lubricated with
liquid being pumped. For permanent instal-
lations where suction lift exceeds 4 m, a foot
valve should be used to assure priming on
start up. All performance figures stated are
for water at 20°C and at full voltage of the
motor.
Note: Max continuous operation for motor 1
hour at 1 bar pressure.
Dry running
Do not run dry for more than 30 seconds.
Lack of liquid will burn the impeller and
damage the seals.
Caution
Do not pump gasoline, solvents, thinners,
highly concentrated or organic acids. If cor-
rosive fluids must be handled, pump life will
be prolonged if flushed with water after each
use or after each work day.
> English
Max wire length*
12 V 24 V
11.5 m
4.4 m 17.2 m
7.3 m 28.7 m
11.7 m
18.3 m
25.6 m
7