ES3, ES4 & ES6 Instructions. V1.06 Page 11 August / 2014
Electrical connection
Do not switch on the electric power at this time.
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 specication on the rating plate
and the technical specications. Ensure that the voltage marked on the appliance matches the
power supply.
WARNING! Check that the power supply is switched off prior to electrical connection!
Fig. 6
3
2
1
Wiring Diagram
1. Electronic regulator
2. Safety thermal cut-out
3. Heating element
PE
L L1
N L2
Commissioning
CAUTION
To prevent damage to the appliance, the instantaneous water heater must be purged of
air before using it for the rst 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.
1. Close the circuit breaker to connect the electrical supply. After a short power up delay the
water heats up.
2. Check everything is working as it should and the water temperature is achieving the desired
temperature. If not follow the guide on page 13.