7
300001069-001-G - 22/02/06
BH 150
3.6
Pressure reducer
If the supply pressure exceeds 80% of the valve or safety unit setting
(e.g. 5.5 bars for a safety unit set at 7 bars), a pressure reducer must
be installed upstream of the DHW tank. Install the pressure reducer
downstream of the water meter in such a way as to ensure the same
pressure in all of the pipes in the installation.
3.7
Bleed circuit
During the heating process, water can flow through the
bleed circuit to guarantee the safety of the installation. Do
not block!
3.8
Domestic hot water circulation loop
See diagram .
3.9
Measures to take to prevent hot water blow back
Fit a non-return valve to the domestic cold water circuit.
If using a closed calorifier, the non-return valve must be easily
accessible.
3.10
Typical systems.
9.
Isolation valve
17.
Drain cock
27.
Non-return valve
28.
Domestic cold water inlet
29.
Pressure reducer
30.
Safety unit
32.
Domestic hot water loop pump (optional)
54.
End of the discharge pipe free and visible 2 to 4 cm above the flow
funnel
56.
Domestic hot water circulation return loop
57.
Domestic hot water outlet
