ES3, ES4 & ES6 Instructions. Issue: No. 2
Page 11
February / 2012
Electrical connection
Do not switch on the electric power at this time.
WArnIng! To prevent damage to the appliance, the instantaneous water
heater must be purged of air before using it for the first time
.
PUrgIng
Before connecting the electrical supply, open and close the hot water tap until
the water runs smoothly and no more air emerges.
nOTE! Every time the appliance is drained (e.g. after work on the
plumbing system, if there is a risk of frost or following repair work),
the heater must be purged in this way before reconnecting the power
supply.
WARNING! This appliance must be earthed.
Installation must be carried out by a competent electrician.
The electrical installation including earthing and cross bonding should comply with
current IEE regulations and any Local Authority requirements.
IMPOrTAnT:
The appliance must be installed according to the specification on
the rating plate and the technical specifications. Ensure that the voltage marked
on the appliance matches the power supply.
The appliance must be permanently connected to the electrical supply through
an isolation switch having a contact separation of at least 3mm on all poles.
To protect the appliance, a circuit breaker must be fitted with a rating suitable for
the nomi nal current of the appliance.
The cross sectional area of the connection cable must be in accordance with the
power rating of the appliance and the specific requirements of the installation site.
Take care to protect the wiring from damage during installation and ensure that
any uninsulated wiring is not directly accessible after installation.
The cable must be adequately secured.
WARNING!
Check that the power supply is switched off prior to electrical
connection!
Fig. 6
3
2
1
Circuit Diagram
1. Electronic regulator
2. Safety thermal cut-out
3. Heating element
PE
N
L
