English (GB)
8
8.5 Additional protection
8.5.1 Systems with single-phase motors
If Hydro Multi-E is connected to an electric installation where an
earth leakage circuit breaker (ELCB) or ground fault circuit
interrupter (GFCI) is used as additional protection, this circuit
breaker or interrupter must be marked with the following symbol:
The leakage current of Hydro Multi-E can be found in section
.
8.5.2 Systems with three-phase motors
If Hydro Multi-E is connected to an electric installation where an
earth leakage circuit breaker (ELCB) or ground fault circuit
interrupter (GFCI) is used as additional protection, this circuit
breaker or interrupter must be of the following type:
• It must be suitable for handling leakage currents and cutting-in
with short pulse-shaped leakage.
• It must trip when alternating fault currents and fault currents
with DC content, i.e. pulsating DC and smooth DC fault
currents, occur.
For these systems an earth leakage circuit breaker or ground
fault circuit interrupter, type B, must be used.
This circuit breaker or interrupter must be marked with the
following symbols:
The leakage current of Hydro Multi-E can be found in section
.
Protection against phase unbalance
The motors must be connected to a power supply with a quality
corresponding to IEC 60146-1-1, class C, to ensure correct motor
operation at phase unbalance.
This also ensures long life of the components.
9. Startup
9.1 Hydro Multi-E in system with positive inlet
pressure
When you have carried out the mechanical and electrical
installation described in section
follows:
1. Check that Hydro Multi-E corresponds to order and that no
single parts have been damaged.
2. Switch off the power supply with the main switch.
3. Switch off the circuit breakers of all pumps.
4. Check that the precharge pressure in the diaphragm tank is
0.7 times the required outlet pressure (setpoint).
5. Connect water and power supplies to the system.
6. Open all pump inlet and outlet valves.
7. Vent all pumps by means of the vent screws.
Fig. 8
Position of vent screws in systems with CME-A/-I
pumps
When an earth leakage circuit breaker or ground
fault circuit interrupter is selected, the total leakage
current of all the electrical equipment in the
installation must be taken into account.
When an earth leakage circuit breaker or ground
fault circuit interrupter is selected, the total leakage
current of all the electrical equipment in the
installation must be taken into account.
ELCB
(GFCI)
ELCB
(GFCI)
Do not start the pumps until they have been filled
with liquid.
Measure the precharge pressure while the system is
pressureless.
TM
05 20
08 421
1
Vent screws
