Description Of The Functions - AERMEC VMF-E1X Manuel D'utilisation Et D'installation

DESCRIPTION
VMF - E1X
EXPANDABLE ELECTRONIC THERMOSTAT BOARD KIT
The VMF-E1X accessory is an advanced
electronic thermostat kit to be applied
to the fan coils; it requires an interface
inside the fan coil (VMF-E2; VMF-E2H),
or on the wall (VMF-E4).
The VMF-E1X kit consists of:
• an E1-type thermostat board inserted
in a protective box and easily applied
to the side of the fan coil. This board
has a protective fuse, a dip-switch
for configuration, and connectors for
connection with:
- the power supply,
- the earthing,
- the valve control,
- the fan motor control,
- the ambient air temperature probe,
- the water temperature probe,
- the auxiliary water temperature probe,
- the control panel (user interface),
- the presence sensor,
- the external contact,
- the microswitch contact connected to
the fan coil fin,
- the central supervisor system serial
(VMF-E5),
- the fan coil network serial (TTL).

Description of the functions

• Operation in TTL network
The E1 thermostat is designed to
communicate with other E0 and/or
E1 and/or E18 type thermostats via a
dedicated serial based on the TTL logic
standards. This serial communication
is essential for the exchange of
information within small fan coil
networks (up to 6) with a maximum
network length of 30 metres. It was
designed, in fact, for small areas where
the fan coils (more than one) need to be
controlled from a single control point.
More specifically, this network always
contains a Master (to which a user
interface VMF-E2, VMF-E2H, VMF-
E4 is connected) which controls the
operation of the Slaves connected to it,
according to the settings made on its
user interface.
The Master fan coil is fitted with an
E0-type electronic board (VMF-E0X, or
fan coils fitted as standard with board
E0X), or an E1-type board (VMF-E1X).
The Slave fan coil must be fitted with an
E0-type electronic board (VMF-E0X), or
an E1-type board (VMF-E1X).
All the fan coils of the TTL network must
have the same type of configuration.
14
AVMFE1LJ 1704 - 6795741_00
With the VMF-E1X, you can manage:
• Three fan coil speeds in manual mode
• Continuous ventilation and thermostat
control, by controlling the valves
• Automatic fan mode according to the load
• Season visualisation
• Visualisation of alarms and ventilation
request
• Up to two ON/OFF 2- or 3-way valves
• The switch-on of an electric heater
• A germicidal lamp
• Plasmacluster filter
• An air temperature probe
• A water temperature probe, with mini-
mum and maximum temperature and
changeover functions
• An additional water probe (accessory)
for controlling the second coil (4-pipe
systems)
• Season change according to the water
or air temperature (4-pipe systems)
• Input for "external contact". This is a
digital input with the following logic:
When open, the thermostat works nor-
mally; When closed, the fan coil is
switched off.
• microswitch for fin contact
• Anti-freeze function
Example: all standard, all with purifiers
(Plasmacluster and/or germicidal
lamps), or all with an additional coil
(electric or with water).
On the basis of the settings received from
the network and the ambient conditions
detected by the probes, the electronic
board on each single Slave fan coil acts
(independently from the other fan coils)
to switch the ventilation on and off in
order to create the conditions requested
by the user for that specific room.
• Cooling operation
Cooling operation requires a water circuit
with chiller.
• Heating operation
Heating operation requires a water circuit
with boiler, heat pump or solar system.
• Changeover (seasonal change)
The thermostat automatically selects the
operating mode (Heating/Cooling), if
that mode is permitted (water probe
and settings).
- Normal band: Heating at 39°C; Cooling
at 17°C.
- Reduced band: Heating at 35°C;
Cooling at 22°C.
- Dead band: can be selected at 5°C or
• Presence sensor
• Input for supervision serial. In networks
made up of several fan coils subdivided
into independent temperature areas, the
X area regulator allows communica-
tion with a central system supervisor
(VMF-E5)
• Communication with other thermostats,
via a dedicated serial based on the TTL
logic standards
2°C.
Water side changeover
- Water temperature checks
Enabling of water side ventilation (only
active with water temperature probe).
The thermostat identifies the ventilation
enabling threshold in Heating mode
(minimum controlled) and Cooling
mode (maximum controlled); with the
dip-switches it is possible to choose
between two temperature bands.
Air side changeover
If the actual ambient temperature is lower
than the set point by a value equal to
the Dead Band, there is an automatic
swap to Heating operation.
If the actual ambient temperature is
higher than the set point by a value
equal to the dead band, there is an
automatic swap to Cooling operation.
In the fan coil networks, the values of the
dead band are only those configured on
the Master fan coil
• Pause due to power failure
After a power failure, the unit restarts
with the settings that were active prior
to the pause.
• Delayed start-up