Xylem JABSCO 50890 User manual

50890 Waste Pump
INSTRUCTION MANUAL

Waste Pump
Robust Single Diaphragm Design
Features
• Flexible installation
• No filter required
• Compact and simple design
• Self-priming to 3m (9.5ft)
• 12V and 24V variants
• Dry running capability
• Connections for 38mm (1-1/2") ports
• Up to 19 lpm (5 US gpm) flow
Specifications
• Suction lift: 3 meters (9.5ft)
• Relevant standards:
• ISO 8846 MARINE and USCG Regulations for Ignition Protection
• ISO 8849 MARINE Bilge Pump Standard
• Built to ISO 15083 Specification
• Meets BSEN 50081 (Electro Magnetic Compatibility)
Performance Curve
Installation
• The Jabsco Waste Pump is self priming up to 3m (9.5ft).
• Uses multi-positional ports for easy mounting of the pump.
• If mounted vertically the motor should be above the pump head.
• Use rubber grommets provided to absorb vibration.
• Plumbing Connections: Use 38mm (1-1/2") ID, non-collapsible
waste type suction hose.
• Connect the hose to inlet and outlet of pump using two stainless
steel hose clamps at both ends.
• All suction connections must be airtight and free of sharp bends
or restrictions.
Operation
The DC motor is suitable for intermittent duty and should not be run for
more than 30 minutes continuously.
Flow – lpm (us gpm)
Differential Pressure – bar (psi)
WARNING: Do not use any Jabsco pump for petrol, petroleum products or
any products with a flash point below 37°C (98°F); explosion or death may occur.
WARNING:The discharge thru-hull may be positioned below the waterline
only if the discharge hose has a vented loop at least 20cm (8") above the waterline
at all angles of heel or trim.

Maintenance
Check all electrical connections periodically, particularly in salt water
areas. Corrosion can cause loss of performance or non-operation in
extreme cases. The motor should be protected with a corrosion inhibiting
spray and any rust should be removed and the motor repainted.
Wiring Instructions
• Make all electrical connections in dry locations; connections
in humid environments should be sealed to prevent corrosion.
• Protect the circuit with a rated fuse or circuit breaker in the red
positive (+) lead as close as possible to the power source.
• Connect the black motor wire to the negative (—) battery terminal.
• Inadequate voltage at the motor terminals when the pump is running
(not less than 10% below rated voltage at full load) due to partially
discharged batteries or insufficient cable size may result in blowing
fuses, failure to start or poor pump performance.
Model No. Voltage Max
Current
Max
Fuse
Size
Wiring Size*
AWG mm2Max Length
50890-1000 12V 8A 10A 14 2.5 4.5m (15ft.)
14 2.5 9.0m (30ft.)
50890-1100 24V 2.5A 5A 14 2.5 4.5m (15ft.)
14 2.5 9.0m (30ft.)
*for longer installations, fit thicker cables
Ensure sterilization of wet end before disassembly.
Rotation of Pump Head (See diagrams on next page)
1. Push down on clip and remove end cover
2. Internal bolt heads now exposed
3. Undo all four mounting bolts
4. Remove bolts and grasp motor unit firmly
5. Rotate pump head to desired position
6. Example of pumps rotational capabilities
7. Replace all 4 internal bolts and secure tightly
8. Replace end cover
Rotation of Ports (See diagrams on next page)
1. Undo clamp using allen key
2. Remove clamp
3. Rotate port unit to desired location
4. Example of pumps rotational capabilities
5. Replace clamp and tighten until firmly secure
WARNING: Always disconnect pump from power supply.
Battery
Inlet
Port
Overload
Protected
Distribution
Panel
Fuse
Outlet Port
Black Wire
Orange Wire
WARNING: If the fuse fails repeatedly do not fit a heavier fuse or bridge the
fuse terminals with silver paper or metal wire. Failure to observe this instruction
may result in a fire hazard due to overheating of cables.

Rotation of Pump Head
1
1
3
3
5
5
7
2
2
4
4
6
8
Rotation of Ports

Exploded View
Part Numbers
Model Voltage Fuse Sizes
50890-1000 12V 7A
50890-1100 24V 5A
Key Description Quantity in Kit
1Bracket
2Bush
3Clamp Bottom
4Clamp Top
5Con Rod
6Con Rod Plate
7Cover* 1
8Diaphragm* 1
9Hex Head Screw
10 Hex Head Screw* 4
11 Motor Assembly
12 Screw Recessed Pan Head* 1
13 Socket Head Screw
14 Washer* 1
15 Waste Pump Chamber
16 Waste Pump Joker Valve* 2
17 Waste Pump Port* 2
18 Washer
* Included in Service Kit
Service Kit
SK890 Service Kit - Waste Pump

Dimensional Drawing
Discover Jabsco at www.xylem.com/jabsco
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.
Jabsco is a trademark of Xylem Inc. or one of its subsidiaries.
© 2019 Xylem, Inc.
43000-0822 Rev. A 9/2019
mm (inches)
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