Robur M40 - Electrical Installer Guidelines; Safety and System Overview; Power Supply Connection

Electrical installer
Installation, use and maintenance manual – M gas unit heater
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4
smooth sheet metal duct.
The insulation of the duct must be assessed, in order to
avoid heat losses.
For the dimensioning of the air duct, consider the data
of air ow and available head of the fan, summarized in
Table 1.2 p.14 .
Minimum pressure drop on heat ow delivery
In order to grant that the centrifugal fan operates
within the operating limits in any situation, it is
mandatory to ensure a minimum pressure drop on
the air delivery. The minimum pressure drop values
are detailed in Table 1.2 p.14 .
4 ELECTRICAL INSTALLER
4.1 WARNINGS
General warnings
Read the warnings in Chapter III.1 p. 4 , provid-
ing important information on regulations and on
safety.
Compliance with installation standards
Installation must comply with applicable regula-
tions in force, based on the installation Country
and site, in matters of safety, design, implementa-
tion and maintenance of electrical systems.
Installation must also comply with the manufactur-
er's provisions.
Live components
 After placing the appliance in the nal position,
and prior to making electrical connections, ensure
not to work on live components.
Earthing
 The appliance must be connected to an eective
earthing system, installed in compliance with reg-
ulations in force.
 It is forbidden to use gas pipes as earthing.
Cable segregation
Keep power cables physically separate from signal
ones.
Do not use the power supply switch to turn the
appliance on/o
 Never use the power supply switch to turn the ap-
pliance on and o, since it may be damaged in the
long run (occasional blackouts are tolerated).
 To turn the appliance on and o, exclusively use
the suitably provided control device.
4.2 ELECTRICAL SYSTEMS
Electrical connections provide:
A. Power supply (Paragraph 4.3 p.23 ).
B. Control system (Paragraph 4.4 p.24 ).
How to make connections
All electrical connections must be made on the terminal
board in the electrical panel of the unit:
1. Ensure the appliance is not live.
2. To access the electrical board open the door on the
right side of the unit.
3. Insert cables through cable gland (detail 3 on dimen-
sional diagrams, Paragraph 1.2 p.8 ).
4. Identify the appropriate connection terminals.
5. Make the connections.
6. Close the door.
4.3 ELECTRICAL POWER SUPPLY
4.3.1 Power supply line
Provide (by the installer) a protected single phase line
(230 V 1-N 50 Hz) with:
▶ Cable type H05 VVF 3x1,5 mm
2
with maximum exter-
nal diameter of 8,4 mm.
▶ Bipolar disconnector with minimum contact opening
of 3 mm.
How to connect the power supply
To connect the three-pole power supply cable:
1. Access the connection terminal block according to
Procedure 4.2 p.23 .
2. Connect the three wires to the terminal block as shown
in Figure 4.1 p.24 .
3. Provide the earth lead-in wire longer than live ones
(last to be torn in the event of accidental pulling).