Johnson Pumps AQUA JET WPS 2.9, Instruction Manual

Page: 8 / 52

8
Typical applications
The WPS pump is a five chamber positive
displacement diaphragm pump.
This pump is the ideal choice for pres-
surizing water in a closed system such as
that found in a boat or in a recreational
vehicle.
It can easily build the pressure required
for a pressurized water supply system.
Features
• Quiet operation
• Smooth flowing
• Self priming
• Integrated pressure switch turns pump
on and off automatically when tap is
opened and closed
• Built-in by-pass valve which reduces the
need for storage tank (only WPS 3.5)
• Dry running without damage
• Low power consumption
• Quick disconnect fittings
Working principle
As the pump runs, pressure is increased
until it reaches the pre-defined pressure
level, see p. 37. When the pre-defined
pressure level is reached the integrated
pressure switch automatically shuts the
pump off.
The pump is equipped with positively
checking outlet valves which ensure that
the pressure is maintained after the pump
shuts off.
When water is demanded (at the faucet,
shower et.c.) the pressure decreases. After
a moderate drop in pressure, the integrated
pressure switch automatically turns the
pump back on.
Due to it’s durable construction and
thoughtful design, the pump will provide
many years of service.
Important! The pressure setting of this
pump is made at the factory. Warranty in-
validated by pressure switch interference.
Water Pressure Systems mounted to dc motor 12/24 V
Technical description
Body: Nylon/Polypropylene
Valve housing: Polypropylene/Polyamide
Valves: Santoprene/EPDM
Diaphragm: Santoprene
Connection: 3/8" BSP, /" hose
(ø 3 mm) and
/" BSP, 3/4" hose
(ø 8 mm) or
US 3/8" NPT, /"
hose (ø 3 mm) and
US /" NPT, 3/4"
hose (ø 8 mm)
Max. liquid
temperature: Max +50°C/+0°F
Fasteners: Stainless steel
Max. suction lift: WPS .9 – m/6.5 ft
WPS 3.5 – m/6.5 ft
WPS 4.0 – m/6.5 ft
WPS 5. – ,5 m/8. ft
Cut in pressure: see page 37
Cut-off pressure: see page 37
(Other pressure settings see page 37)
Duty cycle: Intermittent,
max 0 min
Motor: WPS .9 – 85 W
WPS 3.5 – 85 W
WPS 4.0 – 00 W
WPS 5. – 50 W
/4 V DC
with built in thermal
protection
The motor is ignition protected according
to ISO 8846 (Small craft – Electrical
devices – Protection against ignition of sur-
rounding flammable gases).
Type designation
(See page 37)
enGLISH