en – Original instructions
SCUBA – Additional Installation, Operation and Maintenance Instructions
17
4.3
Hydraulic connection
DANGER:
All the hydraulic and electrical connections must be completed by a technician possessing the
technical-professional requirements outlined in the current regulations.
DANGER: Electrical hazard
Holding the unit by the power supply cord or the float is strictly forbidden.
WARNING:
Piping must be sized to ensure safety at the maximum operating pressure.
WARNING:
Install appropriate seals between the unit couplings and the pipings.
4.3.1
Guidelines for the hydraulic system
1.
Connect the piping to the unit discharge port:
a)
In case of metal piping, this should be screwed directly to the port;
b)
In case of plastic piping, use an adapter.
2.
Install a check valve on the piping, at least 2 m (7 ft) from the unit, and then one every 10 m
(33 ft).
3.
Make a 3 mm (1/8”) relief hole 10 cm (3.9 in) from the discharge port.
4.
Secure the power supply cord to the piping with nylon ties at distances of 3 m (10 ft) from
each other, keeping it loose from one tie and the next, to avoid it being pulled in case of
piping expansion.
5.
Secure a rope made of non-perishable material to the lifting ring.
6.
Lower the unit in the well/tank holding it with the rope.
7.
Position the unit:
•
At the centre of the well/tank
•
Submerged in the liquid at a depth of at least 15 cm (6 in)
•
At a maximum depth of 17 m (56 ft) from the maximum level of the liquid
•
At a minimum distance of 50 cm (20 in) from the bottom of the well/tank
•
With at least 3 m (10 ft) of power supply cord out of the liquid
•
With the float, if installed, at least 5 cm (2 in) from the wall of the well/tank.
