Xylem LOWARA e-SHE Series - Electrical Connection Safety; Grounding and Earthing Procedures

en – Original Instructions
22 e-SHE, e-SHS – Additional Installation, Operation and Maintenance Instructions
4. In case of suction lift installation, the piping must have an increasing slope towards the unit
exceeding 2%; to avoid air pockets. Also install:
• A vacuum pressure gauge
• A foot check valve that guarantees full opening (full section)
• A filling on-off valve to facilitate the removal of the air and priming.
5. Install an on-off valve to exclude the unit from the system during maintenance.
6. Install anti-vibration joints to reduce the transmission of vibrations between the unit and the
system and vice versa.
Guidelines for the discharge side
1. Install a check valve to prevent the liquid from flowing back into the unit when this is at
standstill.
2. Install a pressure gauge.
3. Install an on-off valve, downstream from the check valve and pressure gauge, to regulate
the flow rate.
4. Install anti-vibration joints to reduce the transmission of vibrations between the unit and
the system and vice versa.
4.4 Electrical 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
Before starting work, check that the unit is unplugged and that the
pump unit, the control
panel and the auxiliary control circuit cannot restart, even unintentionally.
NOTICE:
Before starting work, make sure that the general electric requirements and/or those of the
firefighting systems (hydrants or sprinklers) comply with local regulations.
4.4.1 Ground
DANGER: Electrical hazard
Always connect the external protection conductor (ground) to the ground terminal before
attempting to make any other electrical connections.
DANGER: Electrical hazard
Connect all the electrical accessories of the pu
mp unit and motor to the ground.
DANGER: Electrical hazard
Check that the external protection conductor (ground) is longer than the phase conductors; In
case of accidental disconnection of the unit from the phase conductors, the protection
conductor must be the last one to detach itself from the terminal.
DANGER: Electrical hazard
Install suitable systems for protection against indirect contact, in order to prevent lethal electric
shocks.