Johnson Pump F3B-19 Manual De Instrucciones página 7

over-current protection, and protects
the motor from overloading and
rotation. It is important to use the right
fuse size for replacement (see spare
parts list, page 22-23). Use fuse-links.
Incorrect fuse size may cause fire.
If the pump is connected with
separate earth lead, this should be
yellow/green and connected to the
motor base.
Choose wire size in accordance with
total wire lenght (see table below).
The wire connections must be sealed
with a marine sealant.
Note: Before installation with
electrical control systems, check that
equipment to be used is of sufficient
rated capacity to accept ampere draw
of motor. Low voltage will cause motor
to overheat.
Wiring dimensions
(based on 3% voltage drop)
Wire
size
1.5 mm 2 # 16 AWG
2.5 mm 2 # 14 AWG
4 mm 2 # 12 AWG
6 mm 2 # 10 AWG
2
10 mm # 6 AWG
* The wire length is the total distance from the
battery to the pump and back to the battery.
When the pump is used as bilge pump
Max total head 6 m.
The pump must be installed so that
the motor is protected from splash
from bilge water.
The pump must be fitted with a
strainer or other means of preventing
debris from entering the pump.
Self-priming
Pump is self-priming up to 3 m. Intake
lines must be air-tight to ensure self-
priming. Note: Pump will prime when
impeller is dry but suction lift up to 3 m
is only obtainable when impeller is
greased or lubricated with liquid being
pumped.
For permanent installations where
suction lift exceeds 3 m, a foot valve
should be used to assure priming on
start up.
Continuous duty
For continuous duty 0.6 bar (60 kPa)
maximum head is permissible. The
normal working temperature of the
motor is +80°C.
Dry running
Do not run dry for more than 30
seconds. Lack of liquid will burn the
impeller and damage the seals.
If the pump is used for fuel oil
transfer it should be equipped with a
vacuum switch. When the liquid has
been evacuated the electric supply is
automatically switched off.
Max wire
lenght* in m
12 V 24 V
3.7 14.6
Caution
6.1 24.4
Do not pump gasoline, solvents,
9.8
thinners, highly concentrated or
14.6
organic acids. If corrosive fluids must
24.4
be handled, pump life will be pro-
longed if flushed with water after each
use or after each work day.
Temperature
Max ambient temperature: +60°C.
The life of the impeller depends on
the temperature of liquid being
pumped. Temperatures between +5°C
and +60°C give normal life. Higher or
lower temperature will reduce the life.
Freezing weather
Drain unit by loosening the endcover.
Glycol based anti-freezes can be used
but do not use petroleum based anti-
freeze compounds.
offered by Busse-Yachtshop.com
ENGLISH
7