HYDRAULIC CONNECTION.
It is mandatory to install a
safety device, set to be trig-
gered at 0.7 MPa (7 bars)
(not supplied with the water
heater), sized 3/4”, compliant
with standard EN1487 as
amended and added, and in
any case compliant with local
regulations in force: this safety
device is to be fitted to the cold
water inlet of the water heater
and must be protected against
freezing.
The safety unit must be fitted
with a discharge device (over-
pressure) to be operated regu-
larly to remove any limestone
deposits.
It must also be checked regu-
larly to ensure it is not blocked.
The pressure reducer (not
supplied as standard) is re-
quired when the water mains
pressure exceeds 0.5 MPa
(5 bars) and must be mounted
on the main water supply line.
The safety unit must also be
connected to an open drain
pipe, in a frost-free envi-
ronment, with a permanent
downward gradient, to re-
move any expansion water
from the heating process, or
drainage water from the water
heater.
The maximum operating
pressure of the heat exchang-
er circuit must not exceed
0.3 MPa (3 bars) and its max
temperature must not exceed
85°C.
To perform any discharge
operations of the water heater,
strictly adhere to the following
sequence:
- disconnect the appliance
from the electrical power
supply.
- Disconnect the appliance
from the mains water supply
(cold water).
- Open the hot water tap.
- Actuate the discharge device
of the safety unit.
WIRING.
Before removing the cover
of the water heater, always
ensure the power is discon-
nected, to prevent any risk of
injury due to electric shocks.
The following must be provid-
ed upstream of the electrical
system:
- a circuit breaker or 16A
multi-pole fuse with contacts
compliant with regulations
in force.
- A 30 mA differential circuit
breaker.
Should the power cable be
found to be damaged for any
reason, it must be replaced by
the After-sales Support, and/
or in any case by skilled and
qualified staff.
The water heater must be
connected to earth according
to the methods set out by the
regulations in force.
A special terminal, suitably
marked is provided for the
specific purpose.
This manual is supplied jointly
with the water heater; in the
event of loss it may also be
obtained from the Authorised
area Support service or be
downloaded from the suitable
website.
Summary of Contents for 3.030072
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