9
Legend:
1- Safety valve
6- Checking fitting
2- Test valve
7- Funnel with outlet connection
3- Non-return valve
4- Pressure reduction valve
H - Cold water
5- Closing valve
T - Hot water
Closed (pressure) system Open (non-pressure) system
Between the water heater and return safety valve no closing valve may be built-
in because with it the function of return safety valve would be impeded.
The water heater may be connected to the water network in the house without
reduction valve if the pressure in the network is lower than 0.5 MPa (5 bar).
If the pressure exceeds 0.5 MPa (5 bar), a reduction valve must be installed. Prior
to the electric connection the water heater must obligatorily be filled with water.
By first filling the tap for the hot water upon the mixing tap must be opened. When
the heater is filled with water, the water starts to run through the outlet pipe of the
mixing tap.
CONNECTION OF THE WATER HEATER TO THE ELECTRIC
NETWORK
Before connecting to power supply network, install a power supply cord in the water
heater, with a min. diameter of 1,5mm
2
(H05VV-F 3G1,5mm
2
). For it the protection
plate must be removed from the water heater.
The connection of water heater to the electric network must be performed according
to standards for electric installation. Install a disconnect switch (separating all poles
from the power supply network) between the water heater and the permanent
power connection, in compliance with the national regulations.
EN