18
AVMFE18LJ1101 - 6795746_02
NETWORK SETTINGS
TTL NETWORK
- Consisting of up to 6 fan coils (one
Master and 5 Slaves)
- Maximum TTL line length 30m.
The master fan coils are equipped with a
control panel and an electronic board
with microprocessor which has outputs
in order to be inserted in a TTL network.
The Slave fan coils are equipped with an
electronic board with microprocessor
(VMF-E18, VMF-E1 or VMF-E0
accessory) which has outputs in order
to be inserted in a TTL network.
All the fan coils of the TTL network must
have the same type of accessory.
The settings (or set points) of the panel on
the main fan coil (Master) are received
by the other fan coils (Slaves).
The units connected to the TTL network
are automatically recognised (they
require no confi guration procedure).
TTL Line
Max 30m
+
-
FCXI + VMF-E18
FCXI + VMF-E18
+
VMF-E4 / VMF-E2
MASTER
SLAVE
VMF-E2
VMF-E18
VMF-E18
VMF-E18
VMF-E18
VMF-E18
VMF-E18
E4
VMF-E4
ELECTRICAL WIRINGS
Instructions which are essential for the
proper installation of the equipment
are given here.
The installer's experience will be
necessary however, to perfect all the
operations in accordance with the
specific requirements.
Before beginning the installation,
carefully read the information below:
• WARNING: check that the power
supply is disconnected before carrying
out any procedures on the unit.
• WARNING: before carrying out
any work, put the proper individual
protection equipment on.
• WARNING: the device must be
installed in compliance with national
plant engineering rules.
• WARNING: the electrical wirings
and the installation of the units
and their accessories must only be
carried out by people possessing the
technical/professional skills for system
installation, transformation, extension
and maintenance, and who are able to
check these aspects in terms of safety
and good working.
In particular, the electrical wirings
require checks relating to:
- Measurement of the electrical system
insulation strength.
- Continuity of the protection wires.
• WARNING: Install a device, main
switch, or electric plug so you can
fully disconnect the device from the
power supply.
• WARNING: the unit is connected to
the electrical mains. Any intervention
by u n q u a l i f i e d a n d u n t r a i n e d
personnel could cause injury to the
worker and damage to the equipment
and surrounding environment.
• Check the mains voltage complies
with the one requested for the device
to be installed.
• The electrical wiring measurements
must be carried out according to
the regulations in force, taking into
account the system load.
• For the power supply, use undamaged
cables with a section suitable for the
load. You are advised to make the
connections using a single cable for
each one. Do not make connections
on the power supply cable: use a
longer cable. Junctions can cause
overheating and/or fires.
• Only use the appropriate tools for the
electrical wirings.
• Make an earth connection for the
indoor unit.
• Use twisted cables for the connections
to the wired panel.
• Follow the wiring diagrams supplied
with the device and shown in this
documentation when making the
connections.
• The wiring diagrams are subject to
continuous updates, so it is essential
to use those on the machine as your
reference.
• Do not attempt to repair the unit
yourself. An incorrect intervention can
cause electric shocks and/or fires, so
you are advised to contact your local
After Sales Service. For any installation
or technical intervention, please
contact your local After Sales Service.
• All the cables must be piped or ducted
until they are inside the fan coil. The
cables leaving the pipe or raceway
must be positioned in such a way
that there are not traction or twisting
stresses and they are anyway protected
from outside agents.
• Stranded cables can only be used
with cable terminals. Check the cable
strands are well inserted.
• In installations with a 3-way valve, the
minimum water temperature probe
must be relocated from its standard
housing in the coil, to the delivery
pipe upstream from the valve. When
relocating the water probe, the
standard sensor must be replaced with
an accessory VMF-SW sensor, fitted
with a cable of suitable length.
• The connections must be made to the
connectors on the electronic board.
• The electronic board is protected with
a plastic box and a cover that can
easily be removed with the help of a
tool.
• Warning: the diagram showing the
connections of the electronic board to
the control board is printed inside its
box cover.
• Make an earth connection for the
indoor unit.
