•
For protection devices, refer to the tables 1, 2, in the chapter
ELECTRICAL CONNECTIONS.
•
Do not reduce the section of the conductors indicated in table 1
and 2. A maximum short-circuit current of 10kA is required at the
connection point (before protection devices) in order to ensure the
correct intervention of protection devices, see the chapter ELECTRI-
CAL CONNECTIONS.
• The automatic reset function on the thermal device which protects
the fan motor cannot be enabled (by irreversibly removing the rele
-
vant plastic label) for any reason.
•
As for the connection of cables to the terminals of the electrical
equipment, make sure that the earth conductor length is such as to
ensure that it is not subject in any way to accidental disconnection
following any mechanical stress.
•
Provide for a suitable emergency stop circuit able to perform a simul
-
taneous stop in category 0 both on 230Vac single-phase line and on
400Vac three-phase line. The disconnection of both power supply
lines ensures a “safe” transition in the shortest time possible.
•
The emergency stop will have to be performed complying with the
following requirements:
-
The electrical emergency stop device must fulfil the “special
requirements for control switches with direct opening” (refer to
EN 60947-5-1: 2016, Attachment K).
- It is recommended that the emergency stop device is red and the
surface behind it is yellow.
-
The emergency action must be of the hold-to-run type and requi
-
re a manual operation to be restored.
-
When the emergency device is restored, the burner must not
be able to start autonomously, but a further “run” action by the
operator must be required.
-
The emergency activation device must be clearly visible and
easily reachable and actionable in the immediate vicinity of the
burner. It must not be enclosed within protection systems or
behind doors that can be opened with keys or tools.
•
In the case that the burner is positioned in such a way that it can
-
not be easily reached, activated and serviced, provide for a suitable
service plane in order to ensure that the control panel is positioned
between 0.4 ÷ 2.0 metres with respect to the service plane. This
is to ensure an easy access by the operator for maintenance and
adjustment operations.
•
When installing the input power and control cables of the burner
electrical equipment, remove the protection plugs and provide for
suitable cable glands so that an “IP” protection degree equal to or
higher than that indicated on the burner nameplate can be ensured.
ENGLISH
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