Non Return Valve; Electrical Connections - DAB BPH-E Serie Installations- Und Wartungsanleitungen

6.4
Non-return valve
If the system is fitted with a non-return valve,
ensure that the minimum pressure of the circulator
is always higher than the valve closing pressure.

7. ELECTRICAL CONNECTIONS

ATTENTION!
ALWAYS OBSERVE THE SAFETY
REGULATIONS!!
The electrical installation must be carried out
by an expert, authorised
accepts all responsibilities.
THE
CORRECTLY
CONNECTED TO EARTH!!
Always turn off the power supply before
working on the electric or mechanical part of
the system.
Wait at least five minutes after switching off the
appliance before opening it.
–
To protect the system it is recommended to
install a differential switch with correct
dimensions, type: Class A, with adjustable
dispersion current,
against sudden tripping.
The automatic differential switch must be
marked with one of the following two
symbols:
–
In the electrical connection to the power line fit
a two-pole switch with contact opening distance
at least 3 mm and with fuses type AM (motor
start) with a current value suitable for the
feeding motor.
TO GUARANTEE ALL THE
FUNCTIONS OF THE TWIN
CIRCULATORS, BOTH DIALOGUES
MUST BE FED
electrician
SYSTEM MUST
AND SAFELY
selective, protected
!
ENGLISH
who
BE
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