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• Do not over tighten or use oversized screws
to fit the pump to the foundation to mini-
mize transfer of vibration and noise.
2.3 Connections
• Install the strainer and the hose connectors
to the pump, see '8 Connections' on page
39.
Never use Teflon tape or sealing compound on
the thread.
The hose connectors provided are designed
with a 'taper seal' , creating a water tight seal
when hand tightened.
• Connect the pump with at least 30 cm (1 ft)
of a good quality reinforced flexible hose
(12.7 mm, 1/2"). Avoid sharp bends and
kinks or sagging in the hose.
The reinforced hose must be of quality suitable
for drinking water and resistant to a tempera-
ture of at least 50 degrees C (122 degrees F)
and a pressure of 5 bar (5 kgf/cm
Vetus supplies a hose suitable for tap water. It is
tasteless, non-poisonous, resistant to tempera-
tures from -5 to +65 degrees C (+23 to +149
degrees F).
Article Code: DWHOSE12A, drinking water
hose, 12.7 mm (1∕2") internal diameter
• Fit every hose connection with a good stain-
less steel hose clip.
Never connect the pump directly to rigid tub-
ing.
If the system is installed using stainless steel
or copper piping, the pump must still be con-
vetus® Automatic demand water pressure pump WP
W
arning
T
ip
2
, 70 psi).
W
arning
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nected using short sections of hose.
Care should be used when applying sealers
(sealing compound or Teflon tape) in the tub-
ing from tank to pump. Sealers may enter the
pump valves, causing no prime or no shut-off.
Failures due to foreign debris are not covered
under the warranty.
2.4 Electrical installation
• Check that the voltage stated on the identi-
fication plate is the same as the battery volt-
age (12 or 24 V).
• Consult the wiring diagrams on pages 48
and 49 when connecting the pump. Extend
the connector wires if required. Use good
quality wire connectors together with the
right wiring pliers! Make sure that all elec-
trical connections remain dry under normal
conditions in order to prevent electrolysis
and corrosion.
• The minimum cross-section for the connec-
tion wires is 2.5 mm
drop between battery and pump should
not exceed 10% of the supply voltage.
• Use a relay to operate pump model
WP1220B; see electrical diagram on page
49.
• A main switch* and a fuse** must be incor-
porated in the positive cable.
• Connect '+' and '-' as shown in the diagram.
*)
The switch must be rated for 15 Amps.
**) Consult the wiring diagrams on pages 48
and 49 for the correct value of the fuse.
ENGLISH
c
!
auTion
2
(AWG 14). The voltage
050406.02
9
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