Cont ...
- 12
-
4. ELECTRICAL INSTALLATION / EARTHING
4.1. Regulations: The electrical installation must be carried out in accordance with
the current national electrical regulations and installed by a qualified person.
4.2. RCD’s/ELCB’s are not recommended for use with variable speed drives/motors.
If an RCD is mandatory use type B RCD’s.
4.3. For single phase sets with invertor motors the earth leakage circuit breaker must
trip out when an earth fault currents with DC content (pulsating DC) occur.
4.4. RCD’s suitable for use with variable speed drives/motors are not suitable for
personnel protection.
4.5. Do not touch any electrical components for at least 5 minutes after the unit has
stopped to allow any discharge to occur safely.
4.6. Before starting work on the electrical supply ensure power supply is isolated.
4.7. DO NOT allow the supply cord to contact hot surfaces, including the motor
shell, pump body or pipework. The cord should be safely routed and secured by
cable clips.
4.8. Adjacent pipes: Adjacent suction and delivery pipes should be fitted with
earthing clamps in accordance with current regulations (ref Fig 4).
Fig 4.
Diagram of earth continuity connections
4.9. Earthing: This appliance must be earthed via the supply cord.
4.10. Pipework: Copper or metallic pipework must have supplementary earth
bonding where the continuity has been broken by flexible hoses or plastic
components (not supplied).
4.11. Additional earthing: Certain installations may require additional earthing
arrangements such as equipotential bonding. Reference should be made to the
relevant regulations concerning this subject to ensure compliance.
4.12. Connections: The pump must be permanently connected to the fixed wiring of
the mains supply using the factory fitted supply cord, via a double pole
switched fused spur off the ring main and NOT connected to the boiler or the
immersion heater circuits.
To Next Page
Loading...
