Typical Applications; Technical Description; Working Principle; Type Designation - Johnson Pump WPS 3.4 UNO Manual Del Usuario

ENGLISH
Water Pressure Systems 3.5/5.0 UNO mounted
to DC motor 12/24 V.

Typical applications

The WPS 3.4 UNO and WPS 5.0 UNO are
both five-chamber positive displacement
diaphragm pumps. These pumps are the
ideal choice for pressurizing water in a
closed system such as that found in a boat or
in a recreational vehicle.
They can easily build the pressure required
for a pressurized water supply system.
Features
• Quiet operation.
• Smooth flowing.
• Self-priming.
• Integrated pressure switches turns pumps
on and off automatically when tap is
opened or closed.
• Dry running without damage.
• Low power consumption.
• Quick disconnect fittings.

Working principle

As the pump runs, pressure builds until 2.8
bar/ 41 psi. At this point, the integrated
pressure automatically shut the pump off.
The pump is equipped with positively
checking outlet valves, which ensure
that the pressure is maintained after the
pump shut off.
When water is demanded (at the faucet,
shower etc.) the pressure decreases.
After a moderate drop in pressure, the
integrated pressure switch automatically
turns the pump back on.
Due to their durable construction and the
thoughtful design, the WPS 3.4 DUO
And WPS 5.0 UNO pumps will provide
many years of service.
IMPORTANT! The pressure switch setting
of this pump is made at the factory.
Warranty invalidated by pressure switch
interference.
8

Technical description

Body: Polypropylene
Valve housing: Polypropylene
Valves: Santoprene
Diaphragm: Santoprene
Connection: 1/2" hose (ø 18 mm).
Max liquid temp: Max +50°C/+120°F
Fasteners: Stainless steel
Max. suction lift: WPS 3.4 UNO–2 m/6.5 ft
WPS 5.0 UNO–2.5 m/8.2 ft
Cut in pressure: 1.7 bar/25 psi
Cut off pressure: 2.8 bar/41 psi
Duty cycle: Intermittent max 20 min.
Motor: WPS 3.4 UNO - 100 W
WPS 5.0 UNO – 150 W
12/24 VDC with built in
thermal protection.
Accumulator
tank: Corrosion protected tank
with internal rubber bladder.
Capacity 2 liters. Precharge
pressure, 0.8 bar. Air valve,
standard tire valve.
The motor is ignition protected according
to ISO 8846 (Small craft –Electrical
devices - Protection against ignition of
surrounding flammable gases).

Type designation

Type
WPS 3.4 UNO 12V
WPS 3.4 UNO 24V
WPS 5.0 UNO 12V
WPS 5.0 UNO 24V
Part no.
10-13281-01
10-13281-02
10-13281-03
10-13281-04