Galletti FLAT MICRONET User manual

FLAT
MICRONET
MICROPROCESSOR CONTROL
SOLUTION

FC66002179 – Rev.00
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General characteristics................................................................................................3
Main functions and features:.......................................................................................4
Function selector ...................................................................................................................................................5
Fan control in AUTO mode (heating and cooling).....................................................................................................5
LED indications......................................................................................................................................................6
Identifying the operating mode when the unit is disabled.........................................................................................6
Instructions for installing Micronet.............................................................................7
Setting the function dipswitches:..........................................................................................................10
List of dipswitches and respective functions . ........................................................................................................ 10
Room thermostat with control over air temperature:.............................................................................................. 11
Room thermostat with control over ON OFF valve for two-pipe systems..................................................................11
Room thermostat with control over ON OFF valves for four-pipe systems................................................................ 11
Local manual Cooling/Heating changeover ............................................................................................................ 11
Automatic Cooling/Heating changeover according to water temperature .................................................................11
Technical data and operating limits: .....................................................................................................................13
Controller installation configuration .........................................................................14
Function configuration ..............................................................................................14
C1 (Standard): two pipes ..................................................................................................................................... 14
C3: two pipes, one valve...................................................................................................................................... 15
C5: four pipes, two valves................................................................................................................................... 15
C7: four pipes ..................................................................................................................................................... 16
C13: two pipes, automatic changeover water side ................................................................................................. 16
C14: two pipes, one valve, automatic changeover water side - refer to diagram 2 ..................................................17
Instructions for installing Micronet................................................................................. 18
Connection to the RS485 communication network ................................................................................................. 18
Briefly, the situation is as follows:......................................................................................................................... 18
“SMALL” Solution................................................................................................................................................. 19
Installation on the support and fan coil unit..................................................................................... 24
Self-diagnosis procedure ...................................................................................................................................... 25
Self-diagnosis procedure ...................................................................................................................................... 26
Position of the air temperature probe (black) for the FLAT unit. .............................................................................27
Positioning of water temperature sensor (white) for FLAT unit ...............................................................................28
Wiring diagram for Micronet .....................................................................................29
Key to symbols used in wiring diagram: ................................................................................................................ 29
Wiring diagram for Micronet .....................................................................................30

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General characteristics
Micronet is a Microprocessor control panel designed to govern the operation of indoor units installed as part of the
ERGO system, Large or Small version. The controllable units include FLAT fan coil units.
The LARGE solution provides for all controllers (up to 126) to be connected to the supervisor software via an
RS485 connection bus with Modbus protocol integrated in each controller. The chiller (or heat pump) may also be
connected to the supervision system and the software program analyses system data to adapt operation to the
actual conditions.
The Small solution sets up a Master-Slave system (up to 126 slave terminals), in which one of the
Microprocessor controllers plays the role of Master and controls all of the other slave elements.
In this case as well the connection is made via an RS485 bus, consisting of a simple shielded 2-conductor cable.
The standard Micronet controller is designed for wall mounting. A kit for installation on FLAT fan coil units is
available on request.

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In the LARGE version, the supervisor software can ascribe 4 degrees of autonomy to the MICRONET controller,
depending on the level of remote control that has been assigned via the software:
oLOCAL: all functions may be accessed from the local control panel, including speed and temperature
selection and setting of the cooling or heating mode. All operating parameters are in any case read by the
system.
oREMOTE LEVEL A - maximum freedom: the operating mode is set via the software, but all other
functions are accessible from the local control panel, including speed and temperature selection. All
operating parameters are read by the system.
oREMOTE LEVEL B – some degree of freedom: the user can choose the fan speed and adjust the
temperature set via the software by the amount given by “ƩT. setpoint”. The operating mode is
automatically set by the supervisor program.
oREMOTE LEVEL C – locked: No function can be set from the local control panel, which is completely
governed by the software.
In the SMALL network version, the control panel set as Master (identified by the Address 127), send to all
the slaves the following information:
operating mode (cooling or heating)
ambient temperature set point
Each of the slaves, maintains the management of the fan speed and the ambient temperature regulation is
permitted with a delta of ± 2°C around the set point value sent by the master.
The yellow led (if on) indicates the presence of the communication over the serial line (the Master is
identified by the flashing yellow light).
Main functions and features:
•Regulation of air temperature via automatic fan speed adjustment,
•Regulation of air temperature via fan on-off control (fan runs at a fixed speed),
•Timing (not available for wall-mounted model)
•Control of On-Off valves for two or four-pipe systems
•Cooling/Heating changeover in the following modes:
♦local manual switching
♦automatic switching according to water temperature
Additional features include:
•external auxiliary contacts (e.g.; window contact, remote ON/OFF, occupancy sensor etc.) which may enable
or disable unit operation (contacts energised at 230V =OFF; contacts open=ON)
•contacts for enabling the economy mode (only for the “large” solution: energised at 230V=economy; contacts
open= normal);
•water temperature sensor
•air temperature sensor.
The control panel is composed of:
•Function selector for switching the fan coil unit on and off, choosing the type of operation (automatic or with
fixed speed.
•Cooling / Heating button
•LEDs indicating the current operating mode;
•Thermostat for regulating the room temperature.

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Function selector
The function selector enables the user to select the desired function and fan speed of the unit. Specifically, the
following options are available:
OFF: to shut down the unit
AUTO: automatic selection of fan speed according to the difference between the
temperature setpoint and the actual room temperature measured by the sensor.
The operation of the controller in the above-described modes is illustrated in the
appended diagrams.
Fan control in AUTO mode (heating and cooling)
In operation with a constant fan speed (selector on V1, V2 or V3) the ON / OFF hysteresis of the fan is ±0.5 °C
around the setpoint.
0.5°C 1.5°C 2°C 2.5°C 3 °C
0.5°C
1.5°C
2°C
2.5°C
3 °C
Fan speed
V3
V2
V1
TSET (°C)
TAIR (°C)
HEAT COOL
Button for selecting
Coolin
g/
Heatin
g
T
hermostat
LED indicating
cooling mode
LED indicating
heating mode
SUPERVISOR
NETWORK LED
Selector of operation

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Temperature scales
The serigraphic pattern around the thermostat selector represents a temperature scale which ranges from a
minimum to comfort to maximum setting. Depending on the operating mode - cooling or heating - the scale will
correspond to different temperatures as shown in figure 2.
Temperature scales
Cooling
Mode
Heating
Mode
Important : when the “Automatic Cooling/Heating changeover according to air temperature” function is enabled,
the thermostat temperature scale will correspond to the values shown in figure 3.
Temperature scales for
“Automatic Cooling/Heating changeover according to air
temperature”
LED indications.
The LEDs may light up in various combinations indicating different operations and statuses of the controller:
oYELLOW LED ON: the MICRONET control panel is connected to the MODBUS network.
oYELLOW LED FLASHING: for the SMALL solution only, it indicates that the control panel is the network
MASTER.
oBLUE LED ON: the unit is currently set in the cooling mode; the fan coil unit may actually be running or
standing by for a call from the thermostat.
oRED LED ON: the unit is currently set in the heating mode; the fan coil unit may actually be running or
standing by for a call from the thermostat..
oBLUE AND RED LEDS ON: fan coil unit operation is not enabled: the water temperature permits neither
heating nor cooling of the air; or the air temperature is within the neutral zone
oDOUBLE FLASH OF BLUE LED: call from the thermostat to start up the fan coil unit in the cooling
mode.
oDOUBLE FLASH OF RED LED: call from the thermostat to start up the fan coil unit in the heating mode.
Note:
Identifying the operating mode when the unit is disabled
(Blue and Red LEDs on)
When the blue and red LEDs are both lit (operation not enabled, see paragraph above), to determine which
operating mode has been set you must turn the thermostat control until one of the two LEDs starts flashing and
then remains steadily lit. That LED will indicate the active mode (blue = cooling; red = heating). Once you have
identified the operating mode, set the thermostat back in the desired position.
Fig.2
Fig.1

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Instructions for installing Micronet
Important: The Micronet controller has been designed for fan coil units belonging to the FLAT series; should you
wish to use it to control other types of units, you must make sure that the operating limits are complied with (see
relevant section herein).
The MICRONET controller incorporates 2 sets of
dipswitches for configuring the control functions and
assigning the controller a network address.
FUNCTION DIPSWITCHES
Group of 8 dipswitches to be configured as follows:
The dipswitches from 1 to 7 may be used to configure
the controller functions as illustrated in the tables in the
“Function Configuration” section.
The position of dipswitch 8 identifies the type of
installation of the control panel (ON = wall-mounted,
0FF = on unit). In practical terms, it activates the
timing function (only for installation directly on FLAT
fan coil units) or a function for correcting the reading of
the ambient temperature sensor (wall installation).
The standard MICRONET controller is designed for wall
mounting and is therefore equipped with an
incorporated air temperature sensor and non-wired
water temperature sensor.
If the controller is to be installed on an FLAT fan coil
unit, the incorporated air temperature sensor will have
to be replaced with a sensor for on-board installation,
provided with an extension cord (included in the on-
board installation kit, code FYKMB)
“ADDRESS” DIPSWITCHES
Group of 7 dipswitches whose configuration serves to ascribe a network address to the controller, based on the
conversion table included in the “Installation booklet” (code FC67001412), which must be completely filled in to
facilitate the setup procedures for the ERGO supervisor software.
WARNING
The address 0 (all dipswitches OFF) is not allowed!!
WARNING
The address 127 (all dipswitches ON) identifies the MASTER in the SMALL network and is thus reserved for this
purpose. No terminal in the LARGE network may be configured with the address 127!!
IMPORTANT
Make sure to note down the configuration of the function and address dipswitches on the sticker on the back of
the controller. Also specify the room where the controller will be installed.
Important: For each of the terminals connected to the supervision network it is necessary fill out the table included
in the installation booklet, specifying the address of the terminal itself, where it is located, the configuration of the
dipswitches defining the network address, the model of the terminal unit installed and the configuration of the
dipswitches that define the functions (2 or 4 pipes, valves, etc...).

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The table below shows the configuration of address dipswitches
1234567 1234567
1off of f off off of f of f ON 41 off ON of f ON off off ON
2off of f off off of f ON off 42 of f ON off ON off ON of f
3off of f off off of f ON ON 43 off ON of f ON off ON ON
4off of f off off ON off off 44 off ON of f ON ON off off
5off of f off off ON off ON 45 off ON off ON ON off ON
6off of f off off ON ON off 46 off ON off ON ON ON off
7off of f off off ON ON ON 47 off ON off ON ON ON ON
8off of f off ON of f off off 48 off ON ON off off off off
9off of f off ON of f of f ON 49 of f ON ON off off of f ON
10 off of f off ON of f ON off 50 off ON ON off off ON off
11 off of f off ON of f ON ON 51 off ON ON off off ON ON
12 off of f off ON ON off of f 52 off ON ON off ON off of f
13 off of f off ON ON off ON 53 of f ON ON off ON off ON
14 off of f off ON ON ON off 54 of f ON ON off ON ON off
15 off of f off ON ON ON ON 55 off ON ON off ON ON ON
16 off off ON off of f of f off 56 off ON ON ON off of f off
17 off off ON off of f of f ON 57 off ON ON ON off off ON
18 off off ON off of f ON off 58 off ON ON ON of f ON off
19 off off ON off of f ON ON 59 off ON ON ON off ON ON
20 off off ON off ON of f off 60 off ON ON ON ON off of f
21 off off ON off ON of f ON 61 of f ON ON ON ON off ON
22 off off ON off ON ON off 62 of f ON ON ON ON ON off
23 off off ON off ON ON ON 63 off ON ON ON ON ON ON
24 off off ON ON of f off off 64 ON off off off off of f off
25 off off ON ON of f of f ON 65 ON off off off off of f ON
26 off off ON ON of f ON off 66 ON off of f of f off ON of f
27 off off ON ON of f ON ON 67 ON off of f off off ON ON
28 off off ON ON ON of f off 68 ON off off off ON of f off
29 off off ON ON ON of f ON 69 ON off of f of f ON off ON
30 off off ON ON ON ON off 70 ON off off of f ON ON off
31 off off ON ON ON ON ON 71 ON off off off ON ON ON
32 off ON of f off off off off 72 ON of f off ON of f off off
33 off ON of f off off off ON 73 ON off of f ON off off ON
34 off ON of f off off ON off 74 ON off off ON off ON off
35 off ON of f off off ON ON 75 ON off off ON off ON ON
36 off ON of f off ON off of f 76 ON of f off ON ON off off
37 off ON of f off ON off ON 77 ON off off ON ON off ON
38 off ON of f off ON ON off 78 ON off off ON ON ON off
39 off ON of f off ON ON ON 79 ON off of f ON ON ON ON
40 off ON of f ON off off off 80 ON off ON off of f off off
Address Address
Configuration of address dipsw
.
Configuration of address dipsw
.

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1234567 1234567
81 ON off ON of f off off ON 105 ON ON off ON off off ON
82 ON off ON of f off ON off 106 ON ON off ON off ON off
83 ON off ON of f off ON ON 107 ON ON of f ON off ON ON
84 ON off ON of f ON off off 108 ON ON off ON ON off of f
85 ON off ON of f ON off ON 109 ON ON off ON ON off ON
86 ON off ON of f ON ON off 110 ON ON of f ON ON ON off
87 ON off ON of f ON ON ON 111 ON ON off ON ON ON ON
88 ON off ON ON off off of f 112 ON ON ON off of f off off
89 ON off ON ON off off ON 113 ON ON ON of f off off ON
90 ON off ON ON off ON off 114 ON ON ON off of f ON off
91 ON off ON ON off ON ON 115 ON ON ON off of f ON ON
92 ON off ON ON ON off off 116 ON ON ON of f ON off off
93 ON off ON ON ON off ON 117 ON ON ON of f ON off ON
94 ON off ON ON ON ON of f 118 ON ON ON off ON ON off
95 ON off ON ON ON ON ON 119 ON ON ON of f ON ON ON
96 ON ON off of f off off off 120 ON ON ON ON off off off
97 ON ON off of f off off ON 121 ON ON ON ON off off ON
98 ON ON off of f off ON off 122 ON ON ON ON of f ON off
99 ON ON off off off ON ON 123 ON ON ON ON off ON ON
100 ON ON off off ON of f off 124 ON ON ON ON ON off off
101 ON ON off off ON of f ON 125 ON ON ON ON ON off ON
102 ON ON off off ON ON off 126 ON ON ON ON ON ON off
103 ON ON off off ON ON ON 127 ON ON ON ON ON ON ON
104 ON ON off ON off of f off
Address Configuration of address dipsw
.
Address Configuration of address dipsw
.

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Setting the function dipswitches:
1. Take off the controller cover by removing the screw at the bottom.
Important: to make subsequent assembly easier, be careful not to change the position of the two rotary controls
(function selector and thermostat) and their respective potentiometers on the electronic card.
2. Arrange the dipswitches in the sequence corresponding to one of the configurations described in this manual.
Fig.5
List of dipswitches and respective functions .
Dipswitch
N° Function: Position
OFF ON
1Cooling / heating changeover: Local Remote
2Cooling / heating changeover: Manual Automatic
3Automatic cooling / heating changeover according to temperature
of:
Air
(not available) Water
4Neutral zone for automatic cooling / heating changeover according
to air temperature: 5 °C 2°C
5Presence of valve in water circuit: NO YES
6Presence of electric heating element (not available for FLAT): NO YES
7Number of pipes making up water circuit. 2 Pipes 4 Pipes
8Installation on wall or on unit Unit Wall
dipswitches
1234567
On
Of
f
8

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Description of functions
Room thermostat with control over air temperature:
Fan speed is automatically adjusted based on the difference between the temperature set on the thermostat and
the actual room temperature. This function is turned on by setting the speed selector on “Auto”. In the other
positions the fan will simply be switched on and off.
Room thermostat with control over ON OFF valve for two-pipe systems
Fan speed is automatically adjusted based on the difference between the temperature set on the thermostat and
the actual room temperature. This function is turned on by setting the speed selector on “Auto”. In the other
positions the fan will simply be switched on and off.
After the set temperature has been reached, the water valve will close.
In the cooling mode, the fan will continue running at minimum speed even after the valve has closed.
In the heating mode the fan will stop at the same time as the valve closes.
Room thermostat with control over ON OFF valves for four-pipe systems
Fan speed is automatically adjusted based on the difference between the temperature set on the thermostat and
the actual room temperature. This function is turned on by setting the speed selector on “Auto”. In the other
positions the fan will simply be switched on and off.
After the set temperature has been reached, the water valve will close.
In the cooling mode, the fan will continue running at minimum speed even after the cooling circuit valve has
closed.
In the heating mode the fan will stop at the same time as the heating circuit valve closes.
Local manual Cooling/Heating changeover
Manual setting of the microprocessor on the desired function.
The selection is made by pressing the mode button. The blue LED (cooling) or red LED (heating) will light up to
indicate which mode has been selected.
Automatic Cooling/Heating changeover according to water temperature
The microprocessor automatically selects the cooling or heating function based on the water temperature,
according to the following logic:
Water temperature < 17°C: unit set in cooling mode
Water temperature 37°C: unit set in heating mode
Water temperature between 17°C and 37°C: operation disabled
Note: the water temperature sensor is an optional accessory for the wall-mounted version of Micronet.
For directions on installing the water temperature sensor, see figures 13 to 17 in this manual.

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Timing
Available only for Micronet panels installed directly on fan coil units, this function starts up the fan at regular
intervals (every 10 min.) and runs it at medium speed for 2 min. once the temperature inside the room has
reached the level set on the thermostat. It guarantees constant monitoring of the ambient air temperature; the
function is active only in summertime and only if enabled by the water temperature sensor.
A timed cycle is carried out also when the controller is powered (when started up for the first time or when the
power supply is restored after being interrupted).
Note :
While the timing function is active, the thermostat and function selector will be disabled.
The timing function is available only for valveless units and only during summertime operation.
The timing function is not available for wall-mounted Micronet controllers.
On / off according to water temperature
According to the water temperature read by a specific sensor, the microprocessor will enable fan coil unit operation
according to the following logic:
Water temperature < 17°C: unit operation enabled in cooling mode
Water temperature 37°C: unit operation enabled in heating mode
For directions on how to install the water temperature sensor, see figures 13 to 17 in this manual.

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Diagrams illustrating how operation is enabled according to water temperature
Technical data and operating limits:
Storage temperature: from -40°C to +85°C
Operating temperature: from 0°C to 40°C
Sensor precision: ±0.2°C
Max current on terminals V1, V2, V3 (fan speed): 1.1 A
Max current on terminals R and V (Valve): 0.15 A
17° 22° 30° 37° T water
(
°C
)
HEATCOOL Standby Heating
hysteresis
Cooling
hysteresis
Enabling

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The following pages provide an illustration of all possible Micronet configurations, along with the respective
dipswitch sequences, any special operating features and specific notes.
Choose the configuration that is best suited to your installation’s requirements and apply it as described.
Controller installation configuration
Depending on where you plan to install the MICRONET panel, you must first set dipswitch 8 as shown below
Position of dipswitch 8 for configuration 5:
1 2 3 4 5 6 7 8
On/Off On/Off On/Off On/Off On/Off On/Off On/Off On/Off
On
Off
Function configuration
The Micronet controller can be configured in different ways: among the various functions available, you can enable
the ones you wish specifically to implement. The various configurations are set by positioning the dipswitches on
the electronic card accordingly.
C1 (Standard): two pipes
System characteristics
Number of pipes: 2
Valve: NO
Heating element: NO
List of functions activated in configuration 1:
•Room thermostat with control over air temperature
•Local manual Cooling/Heating changeover
•On/ off according to water temperature
•Timing (not available for wall-mounted Micronet controller)
Position of dipswitches for configuration 1:
1 2 3 4 5 6 7
Off Off Off Off Off Off Off
On
Off
ON = installation on wall
OFF = installation on unit

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C3: two pipes, one valve
System characteristics
Number of pipes: 2
Valve: YES
Heating element: NO
List of functions activated in configuration 3:
•Room thermostat with control of ON OFF valve for two-pipe systems
•Local manual Cooling/Heating changeover
•On / off according to water temperature
Position of dipswitches for configuration 3:
1 2 3 4 5 6 7
Off Off Off Off On Off Off
On
Off
C5: four pipes, two valves
System characteristics
Number of pipes: 4
Valve: YES
Heating element: NO
List of functions activated in configuration 5:
•Room thermostat con with control of ON OFF valve for four-pipe systems
•Local manual Cooling/Heating changeover
•On / off according to water temperature
Position of dipswitches for configuration 5:
1 2 3 4 5 6 7
Off Off Off Off On Off On
On
Off

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C7: four pipes
System characteristics
Number of pipes: 4
Valve: NO
Heating element: NO
List of functions activated in configuration 7:
•Room thermostat with control over air temperature:
•Local manual Cooling/Heating changeover
•On / off according to water temperature
•Timing (not available for wall-mounted Micronet controller):
Position of dipswitches for configuration 7:
1 2 3 4 5 6 7
Off Off Off Off Off Off On
On
Off
C13: two pipes, automatic changeover water side
System characteristics
Number of pipes: 2
Valve: NO
Heating element: NO
List of functions activated in configuration 13:
•Room thermostat with control over air temperature
•Automatic Cooling/Heating changeover according to water temperature
•Timing (not available for wall-mounted Micronet controller):
Position of dipswitches for configuration 13:
1 2 3 4 5 6 7
Off On On Off Off Off Off
On
Off

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C14: two pipes, one valve, automatic changeover water side - refer to diagram 2
System characteristics
Number of pipes: 2
Valve: YES
Heating element: NO
List of functions activated in configuration 14:
•Room thermostat with control of ON OFF valve for two-pipe systems
•Automatic Cooling/Heating changeover according to water temperature
Position of dipswitches for configuration 14:
1 2 3 4 5 6 7
Off On On Off On Off Off
On
Off

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Instructions for installing Micronet
Connection to the RS485 communication network
The communication network relies on a simple shielded 2-conductor
cable, directly connected to the RS485 serial ports of the controllers
(terminals A, B and GND).
"Use AWG24 cable (diameter 0,5mm) to realize the
network"
WARNING:
To avoid any operation problems, the cables of
the communication bus (RS485) and the cables
of the of the probes cannot be installed next to
power cables (230V);
In the case of the ERGO “LARGE” solution the network terminates
on the RS232-RS485 converter, which must be connected to the
serial port of the personal computer in which the ERGO supervision
software resides. The network is powered by the converter itself.
The communication network must have the following general
structure:
Pull-up, pull-down and termination resistors are already present inside
each MICRONET controller and may be activated via the jumpers
provided.
The certainty of logic levels is obtained with the pull-up and pull-
down resistors. These resistors are also present in the RS232 – RS485
serial converter supplied with the software.
In this case only the termination resistor, on the last Micronet in the
network, needs to be activated by means of J5
If the serial converter is not used (because a serial converter other
the one supplied is already present or because the SMALL solution
is being implemented), it is also necessary to activate resistors J3,
J4 and J5 (on the first controller) as well as the termination resistor
(J5) on the controller farthest from the Master or from the PC in
which the serial converter is installed.
Briefly, the situation is as follows:
BA
+5 V
560 Ω
560 Ω
120 Ω
J3
J4
J5
560 Ω
120 Ω
560 Ω
120 Ω
B
A
+5
Micronet 1 Micronet K
Master
GND

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“LARGE” Solution (RS232-RS485 or USB-RS485 converter supplied with the software)
Activate only the termination resistor on the last controller in the network (Jumper J5)
Note: “LARGE” Solution (serial converter without pull-up/pull-down and termination resistors)
Activate the pull-up/pull-down and termination resistors (jumpers J3, J4 and J5) on the controller near the
converter and, as in the previous case, only the termination resistor on the last controller in the network (Jumper
J5)
“SMALL” Solution
Activate the pull-up/pull-down and termination resistors (jumpers J3, J4 and J5) on the master controllers and, as
in the previous case, only the termination resistor on the last controller in the network (Jumper J5)
The network connection scheme entails a simple parallel connection, which must:
(1) Comply with the polarity of the connection: indicated with A(-) and B(+)
(2) Avoid ground loops (ground shield at one end only)
V1 Minimum speed
V2 Medium speed
V3 Maximum speed
L Phase
PE Ground
N Neutral
RE Valve for additional heat exchanger
V Valve for standard heat exchanger
RM Economy contact (Large only)
SW Water temp. sensor
SA Air temp. sensor
EX External auxiliary contact (230 V=OFF;
contacts open=ON)
A RS485 network negative
B RS485 network positive
GND RS485 network common

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(-)
(+)
Converter
RS232-RS4854
(
USB-RS485
)
chiller