JABSCO 50840 Series User manual

50840 Series Low Pressure Centrifugal Pump
1
“CYCLONE PUMP”
Stainless Steel DC Motor / Pump Unit
A range of Stainless Steel General
Purpose Centrifugal pumps designed
specifically for the marine and industrial
markets. Typical applications would be for
circulation applications such as hot water
systems, livewell or bait tank installations.
•Heavy duty robust design
•Stainless steel construction
•Long life DC motor
•Silent running
•Anti-clog impeller design
•Long life mechanical seal
•Single tool servicing
50840-Series Cyclone Performance
Typical performance based on pum ps running at 12.8V and 25.6V DC
Flow - lpm (gpm)
Total Head - bar (psi)
0.2 ( 2.9)
0.3 ( 4.4)
0.4 ( 5.8)
0.5 ( 7.3)
0.1( 1.5)
120 ( 31.7)80 ( 21.1)40 ( 10.6)
0.6 ( 8.7)
0
0
0.7 ( 10.2)
Features & Benefits
Specification
Part Numbers
Performance Curve
WARNING: Do not pump petrol or
fluids with a flash point below 37°C
(98°F). Explosion and death may
occur.
Installation Instructions
•The Cyclone can be mounted on any flat
surface.
•The pump must be installed below the lowest
fluid level to maintain flooded suction.
•Fit pump in a dry, well ventilated position.
•Use rubber grommets provided to minimise
vibration.
•If mounted vertically, ensure the motor is
above the pump head.
•Use 3/4" pipe fittings with PTFE pipe joint tape
or compound.
•Plastic fittings should not be used if pump is
installed below the waterline.
•Continuously rated
•Motor life 3500 hours
•2m suction lift when wet
• Fluid Temperature +4°c min +95°C max
Relevant Standards
•ISO 8846 MARINE and USCG Regulations
for Ignition Protection
•ISO 8849 MARINE Bilge Pump Standard
WARNING: All marine pumps
discharging overboard must be installed
with the overboard discharge well above
both static and heeled waterlines.
Flooding and death may occur.
Model Voltage Port Fitting
50840-0012 12Vdc NPTF
50840-2012 12Vdc BSP
50840-0024 24Vdc NPTF
50840-2024 24Vdc BSP

50840 Series Low Pressure Centrifugal Pump
2
Wiring Instructions
• All electrical wiring should be connected and
installed by a competent electrician. A qualified per-
son must ensure that the installation conforms to
the regulations in place.
• Ensure connections are of the correct polarity
red/orange (+ve) black negative (-ve). Note; if
wired in reverse the pump will still run but give poor
performance.
• Always use the correctly rated fuse or circuit break-
er. If a circuit breaker is used it should be of the
“conditionally surge current proof” type. Please see
document 43010-0272 for recommendations or
consult the factory if more advice is needed.
• Check that the supply voltage is compatible with
the voltage specified on the label. A discharged
battery will result in reduced pump performance.
Operation
•Pump may be run dry for short periods of time.
•Pump may be run against a closed discharge.
Maintenance
•Check all electrical connections periodically.
•Check seal area for signs of leaking.
Spare Parts List
Wiring Diagram
Wire Size Table
See Exploded View (Page 4) for explanation of
parts key
WARNING: If the fuse fails repeatedly,
do not fit a heavier fuse or bridge the
terminals. Fire and death may occur.
WARNING: Motor may get hot after
prolonged use, do not touch. Burns may
occur.
(A) Pump Head Kit (NPT)
Pump Head Kit (BSP)
50844-0000
50844-2000
(B) Seal Kit 50835-0000
(C) Motor Kit (12V)
Motor Kit (24V)
50836-0012
50836-0024
KEY DESCRIPTION KIT KEY QTY PER
KIT
A B C
1 Housing 1 1
2End Cover 1 1
3 O-Ring 1 1 1
4 Screws 5 5 5
5Impeller 1 1
6 Seal 1 1
7 Motor 1 1
8 Locking Nut 1 1 1
9Slinger 1 1
Model
Number Voltage Maximum Current
Fuse
Size
Wiring Size*
AWG mm2Max. Length
50840-XX12 12V 9.0A 10A 14 2.5 4.5m (15 ft)
10 6.0 9.0m (30 ft)
50840-XX24 24V 4.5A 7A 18 1.0 4.5m (15 ft)
16 1.5 9.0m (30 ft)
* wire length from battery to pump and back to battery, maximum voltage drop 3%

50840 Series Low Pressure Centrifugal Pump
Dis - Assembly Re - Assembly
3
1
Disconnect
pump from
power supply.
Remove 3 end
cover bolts, end
cover & o-ring.
2 Carefully
holding impeller,
remove impeller
nut.
3 Remove
impeller.
4 Loosen 2 head
fixing bolts,
rotate pump
head and pull to
remove.
5 Remove seals
from pump
body.
6 Wet the flat seal
part and cup
rubber and push
into head.
7 Fit head to motor
locking into
position and
tighten head
fixing bolts.
8 Lubricate inside
of mechanical
seal and push
onto shaft.
9 Fit and carefully
hold impeller an d
tighten nyloc nut.
Once tight,
carefully hold
impeller and undo
nut 1 revolution to
set impeller
clearance.
10 Fit o-ring to the
body, then place
on the head.
11 Tighten 3 end
cover bolts.

Warranty: All products of the company are sold and all services of the company are offered subject to the company’s warranty and terms and conditions of sale, copies of which will be furnished upon request. The information pro-
vided herein is for guidance only, it does not constitute a guarantee of the performance or specification of any individual product or component.
©Copyright 2006 ITT 43000-0820 Rev 07/08
4
Dimensional Drawing
Exploded View
50840 Series Low Pressure Centrifugal Pump
Dimensions in mm (inches)
Weight 2.88kg (6.3lbs)
© 2012 Xylem, Inc. All rights reserved. JABSCO is a registered trademark of Xylem Inc. or one of its subsidiaries. 43000-0820 Rev: B