Johnson Pump Aqua Jet WPS 2.9 Instruction Manual page 5

Start-up procedure
After pump installation, the system
can be started by using the following
procedure:
• Fill water tank
• Open one tap
• Turn on pump
• Close tap once water begins flowing
• Open each additional tap until all air
has been purged from system
• Pump will shut off after taps are
closed and pressure builds to the
setpoint of the pressure switch
Self-priming
The pump is self-priming up to 2m for
WPS 2.9 and WPS 4.0, 2,5m for WPS
5.2 and 2m for WPS 3.5. The inlet pipe
must be airtight to ensure self-priming.
Dry running
Pump will not be damaged by shorter
period of dry running. It will, however,
unnecessary reduce your battery power.
Caution
Do not use pump for any other liquids
than fresh-water and sea-water.
Temperature
Max liquid temperature: +50°C/+120°F
Max ambient temperature:
+60°C/+140°F
Winterizing
If water is not drained from the system
during freezing temperatures, damage
is likely to be sustained in the plumbing
and in the pump. To prevent damage
follow the instructions beneath:
1. Drain water storage tank.
2. Open all taps.
3. Run pump until remaining water is
expelled.
4. Disconnect inlet and outlet tubes.
5. Run pump briefly to confirm that
water has been expelled.
6. Taps shall remain open and pump
fittings shall remain disconnected
until temperatures are above freezing
Never start a frozen pump. Even if it is
drained it might contain a small amount
of frozen water that locks the rotor.
Service instructions
(see page 42-47)
Change of Switch (pos A) WPS
2.9/3.5
1. Remove the cables from the power
source.
2. Remove the screws (27) and then
remove the complete switch including
diaphragm (18).
3. Cut the connection to the motor
(red).
4. Locate the new diaphragm (18) and
then the new complete switch.
5. Take the new switch and attach the
cables to motor and power source.
Use the attached jointing sleeve to
connect the motor cable.
Change of Switch (pos A)
WPS4.0/5.2
Remove the cables from the power
source.
2. Remove the screws (28) and then
remove the complete switch including
diaphragm (19).
3. Cut the connection to the motor
(red).
4. Locate the new diaphragm (19) and
then the new complete switch.
5. Take the new switch and attach the
cables to motor and power source.
Use the attached jointing sleeve to
connect the motor cable.
Accessories
(See page 41)
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