Description Of The Functions - AERMEC VMF-E18X Manual De Instrucciones E Instalación

DESCRIPTION
VMF-E18X
KIT containing an ELECTRONIC EXPANDABLE THERMOSTAT BOARD FOR INVERTER FAN COILS
The VMF-E18X accessory is an advanced
electronic thermostat kit for use with
Inverter fan coils. It requires an interface
inside the fan coil (VMF-E2) or on the
wall (VMF-E4).
The VMF-E18X kit consists of:
• An E18-type thermostat board inserted
in a protective box and easily applied to
the side of the fan coil.
• System with connection cables to the
Inverter Command Module. The cables are
wired with connectors for quick connection.
The E18-type thermostat board has a pro-
tective fuse, a dip-switch for configura-
tion, and connectors for connection with:
- the power supply,
- the earthing,
- the valve control,
- the Inverter command module power
supply,
- ambient air temperature sensor,
- water temperature sensor,
- auxiliary water temperature sensor,
- the control panel (user interface),
- presence sensor,
- the external contact,
- microswitch contact connected to the
fan coil fin,

Description of the functions

• Operation in TTL network
The E18 thermostat is designed to com-
municate with other E18 and/or E1
and/or E0 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-E4 is con-
nected) which controls the operation of
the Slaves connected to it, according to
the settings made on its user interface.
You are advised to configure as the
Master an Inverter fan coil with an
E18-type electronic board (VMF-
E18X or fan coils with E18 board
as standard). WARNING: if the
Master is an On-Off fan coil with
an E1 (VMF-E1X) or E0 (VMF-E0X)
type board, the Inverter Slave fan
coil with the VMF-E18X board will
lose the continuous control of the
- the central supervisor system serial
(VMF-E5),
- the fan coil network serial (TTL).
With the VMF-E18X, you can manage:
• Three fan coil speeds in manual mode
• Continuous ventilation and thermostat
control by controlling the valves
• Automatic fan mode with BRUSHLESS
motor depending on the load
• Season display
• Display of alarms and ventilation request
• Up to two ON/OFF two or three-way valves
• Ignition of an electric resistor
• Accensione di una resistenza elettrica in
modalità integrativa oppure in modalità
sostitutiva, ovvero il riscaldamento è
garantito solo dal carico elettrico.
• Germicidal lamp
• Plasmacluster filter
• A water temperature sensor, with mini-
mum and maximum temperature and
changeover functions.
• An additional water sensor (accessory) to
control 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
20 steps in manual mode.
The fan coil acting as Slave (of an
Inverter Master fan coil with VMF-E18X
thermostat) must be fitted with an E18-
type electronic board (VMF-E18X), or
(if On/Off) with an E1 (VMF-E1X) / E0
(VMF-E0X) type board.
All the fan coils of the TTL network must
have the same type of configuration.
Example: all standard, all with puri-
fiers (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 ventila-
tion on and off in order to create the
conditions requested by the user for
that specific room.
• Cooling operation
Cooling operation requires a water cir-
cuit with chiller.
• Heating operation
Heating operation requires a water
circuit with boiler, heat pump or solar
normally; When closed, the fan coil is
switched off.
• Microswitch for fin contact.
• Anti-freeze function.
• Presence sensor to enable the "sleep"
function from an external contact
(reduction of ambient setpoint by 2 or
5 degrees, depending on the settings, if
a room is unoccupied)
• Input for supervision serial. In networks
made up of several fan coils subdivided
into independent temperature areas,
the VMF-E18X area regulator allows
communication with a central system
supervisor (VMF-E5)
• Input for local serial. Communication
with other thermostats, via a dedicated
serial based on the TTL logic standards.
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 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
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