Type Designation - Johnson Pump Aqua Jet WPS 2.9 Instruction Manual

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Aqua Jet WPS Water Pressure Systems
mounted to DC motor 12/24 V
Typical applications
The WPS pump is a five chamber posi-
tive 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 recreatio-
nal 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
invalidated by pressure switch interfe-
rence.
Technical description
Body: Nylon/Polypropylene
Valve housing: Polypropylene/Polya-
mide
Valves: Santoprene/EPDM
Diaphragm: Santoprene
Connection: 3/8" BSP, 1/2" hose
(ø 13 mm) and
1/2" BSP, 3/4" hose
(ø 18 mm) or
US 3/8" NPT, 1/2"
hose (ø 13 mm) and
US 1/2" NPT, 3/4"
hose (ø 18 mm)
Max. liquid
temperature: Max +50°C/+120°F
Fasteners: Stainless steel
Max. suction lift: WPS 2.9 – 2 m/6.5 ft
WPS 3.5 – 2 m/6.5 ft
WPS 4.0 – 2 m/6.5 ft
WPS 5.2 – 2,5 m/8.2 ft
Cut in pressure: see page 37
Cut-off pressure: see page 37
(Other pressure settings see page 37)
Duty cycle: Intermittent,
max 20 min
Motor: WPS 2.9 – 85 W
WPS 3.5 – 85 W
WPS 4.0 – 100 W
WPS 5.2 – 150 W
12/24 V DC
with built in thermal
protection
The motor is ignition protected accor-
ding to ISO 8846 (Small craft – Electri-
cal devices – Protection against ignition
of surrounding flammable gases).

Type designation

(See page 37)