FC66002177 - Rev.00 1

FLAT MICROPRO

MICROPROCESSOR CONTROLLER FOR FAN COILS

FC66002177 - Rev.00 2

Main features ....................................................................................................... 3

Main functions and equipment: ........................................................................... 3 Temperature range ............................................................................................................................................... 4 LED indicators. ...................................................................................................................................................... 4

Description of the operating modes .................................................................... 5 Room thermostat with air temperature control ........................................................................................................ 5 Room thermostat with ON-OFF valve control for two pipe systems ........................................................................... 5 Room thermostat with ON-OFF valves control for four pipe system systems .............................................................. 5 Manual in built Cooling/Heating switching mode ...................................................................................................... 6 Manual remote Cooling/Heating switching mode ..................................................................................................... 6 Automatic Cooling/Heating switching mode based on the water temperature ............................................................ 6 Automatic Cooling/Heating switching mode based on the air temperature ................................................................ 6 Selecting the extempt of the neutral zone ............................................................................................................... 7 Time function ........................................................................................................................................................ 7 Fan coil enabling system based on the water temperature ....................................................................................... 8 Technical data and operation limits ........................................................................................................................ 8

Possible configurations ....................................................................................... 9 C1 (Standard): two pipes ....................................................................................................................................... 9 C2: two pipe systems– Remote switching mode ..................................................................................................... 9 C3: Two pipe systems– One valve ........................................................................................................................ 10 C4: Two pipe systems– One valve – Remote switching mode ................................................................................. 10 C5: Four pipe systems – Two valves ..................................................................................................................... 11 C6: Four pipe systems – Two valves – Remote switching mode ............................................................................. 11 C7: Four pipe systems ......................................................................................................................................... 12 C8: Four pipe systems – Remote switching mode .................................................................................................. 12 C13: Two pipe systems– Automatic switching on water side ................................................................................. 13 C14: Two pipe systems– One valve – Automatic switching mode on water side ....................................................... 13 C15: Four pipe systems – Automatic switching mode on air side ............................................................................ 14 C16: Four pipe systems – Two valves – Automatic switching mode on air side ........................................................ 14

Micropro installation instructions ...................................................................... 16 Position of the air temperature probe (black) for the FLAT unit. ............................................................................. 16 Setting the micro-switches: .................................................................................................................................. 16 List of the micro-switches and of the relative functions. ......................................................................................... 16

Micropro installation instructions ...................................................................... 17 Autodiagnosis procedure ...................................................................................................................................... 19 Positioning of water temperature sensor (white) for FLAT unit ............................................................................... 20

Wiring diagram of the Micropro controller for FLAT fan coils ............................ 22 Key of the symbols of the wiring diagram: ............................................................................................................ 22

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Main features Micropro is a microprocessor controller designed to control fan coils of the FLAT series. Main functions and equipment: • Regulation of the air temperature via the automatic variation of the fan speed.

• Regulation of the air temperature via the on-off switch of the fan at a fixed speed.

• Time function.

• Control of ON-OFF valves for two or four pipe systems.

• Cooling/Heating switching mode in the following way: ♦ Manual – in-built ♦ Manual - remote (centralized) ♦ Automatic – based on the water temperature ♦ Automatic – based on the air temperature

It is also equipped with: • Free contacts for external enabling signal (i.e.: reed contact, remote ON/OFF switch, proximity contact

etc.) that may enable or disable the unit. (closed contact = OFF; open contact = ON) • Free contacts for the centralized Cooling/Heating switching system. (closed contact = Cooling; open

contact = Heating) • Water temperature probe • Air temperature probe. The control panel is made of: • Operating mode selector, to turn the fan coil on and off, to choose the type of operating mode

(automatic or at fixed speed). • Cooling/Heating selector • Operational LEDs indicating the current operating mode in use. • Thermostat to control the room temperature.

Operating mode selector switch

Cooling/Heating selector

Thermostat

Cooling mode running LED

Heating mode running LED

Fig.1

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Temperature range The print around the selector switch of the thermostat represents the temperature range from minimum, to comfort, through to maximum. The range is referred to different temperatures, as illustrated in fig. 2, depending on the operating mode selected – Cooling/Heating.

Temperature range

Cooling mode Heating mode

Warning: When the “Automatic Cooling/Heateing switching mode based on the air temperature” is running, the temperature range of the thermostat is as illustrated in fig. 3.

Temperature range for the “Automatic Cooling/Heating switching mode based on the air temperature”

LED indicators. The various combinations in which the LED light up indicate different procedures and operating status of the controller:

• Blue LED lit Indicates that the Cooling mode is running. The fan coil is running or waiting for an input from the thermostat.

• Red LED lit Indicates that the Heating mode is running. The fan coil is running or waiting for an input from the thermostat.

• Blue and Red LEDs lit Indicates that the fan coil has received no enabling signal: The water temperature doesn’t enable the air cooling or heating functions (see “Enabling signal based on water temperature”) or the temperature of the air is within the neutral zone (see “Automatic Cooling/Heating switching mode based on the air temperature”).

Fig.3

Fig.2

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Note: How to realise the operating mode when an enabling signal is missing (Blue and Red LEDs lit): When the blue and red LEDs are both lit (no enabling signal, see previous section above), to check which operating mode is selected, turn the knob of the thermostat until one of the two LEDs starts to flash and then remains lit. This LED points out the operating mode selected (Blue = Cooling - Red = Heating). Once the operating mode has been established, turn the thermostat back to the desired position.

• Double flashing of the blue LED This means that the thermostat has sent an input to the fan coil for it to start in Cooling mode. It flashes when the room temperature and the conditioning temperature set are the same: The temperature of the air in the room can be seen at any time on the thermostat range by turning the knob of the thermostat.

• Double flashing of the red LED This means that the thermostat has sent an input to the fan coil for it to start in Heating mode. It flashes when the room temperature and the heating temperature set are the same: The temperature of the air in the room can be seen at any time on the thermostat range by turning the knob of the thermostat Description of the operating modes

Room thermostat with air temperature control The fan speed is switched automatically based on the difference between the temperature set on the thermostat and the room temperature. This function is enabled by turning the speed selector switch to “Auto”. In the other positions the fan will simply be switched on

and off.

Room thermostat with ON-OFF valve control for two pipe systems The fan speed is switched automatically based on the difference between the temperature set on the thermostat and the room temperature. This function is enabled by turning the speed selector switch to “Auto”. In the other positions the fan will

simply be switched on and off. The water valve is shut-off once the desired temperature is reached. In Cooling mode the fan continues at minimum speed even after the valve has shut-off. In Heating mode the fan is stopped as soon as the valve is shut-off.

Room thermostat with ON-OFF valves control for four pipe system systems The fan speed is switched automatically based on the difference between the temperature set on the thermostat and the room temperature. This function is enabled by turning the speed selector switch to “Auto”. In the other positions

the fan will simply be switched on and off. The water valve is shut-off once the desired temperature is reached. In Cooling mode the fan continues at minimum speed even after the valve of the cooling circuit has shut-off. In heating mode the fan is stopped as soon as the valve of the heating circuit is shut-off.

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Manual in built Cooling/Heating switching mode The microprocessor controller is pre-arranged to operate manually in the desired mode. It is enabled by pressing the selector key. The blue (Cooling) and red (Heating) LEDs point out the operating mode selected.

Manual remote Cooling/Heating switching mode The microprocessor controller is pre-arranged to operate manually and remotely in the desired mode. This mode is carried out by connecting the system to a remote switch. Use the special terminals on the electronic PCB of the Micropro system.

Automatic Cooling/Heating switching mode based on the water temperature

The microprocessor controller automatically selects the Cooling or Heating mode based on the temperature of the water and according to the following logic:

Water temperature < 17°C: the Cooling mode is set Water temperature ≥ 37°C: the Heating mode is set Water temperature between 17°C and 37°C: the system is disabled See figs. 11÷15 of this manual for the assembling instructions of the water temperature probe.

Automatic Cooling/Heating switching mode based on the air temperature

The microprocessor controller automatically selects the Cooling or Heating mode based on the temperature of the air compared to a neutral temperature interval (Neutral zone) centred on the set value of the thermostat. Warning: When this function is selected, the temperature range of the thermostat refers to the values indicated in fig. 3, both for the Cooling and the Heating.

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Selecting the extempt of the neutral zone

v The neutral zone is a parameter related to the “Automatic Cooling/Heating switching mode based on the air temperature” function. The neutral zone is a temperature interval astride the set temperature: When the air is warmer than the top limit of the neutral zone, the Cooling mode is selected. When the air is cooler than the lower limit of the neutral zone, the Heating mode is selected. The following figure illustrates an example with: Neutral zone = 5°C Set room air temperature = 21°C For temperatures above 23.5°C the Cooling operating mode is selected For temperature below 18.5°C the Heating operating mode is selected.

Fig. 4 Micropro is used to select the extempt of the neutral zone at 2°C or 5°C in order to obtain respectively a more or less precise control of the air temperature.

Time function

The time function is used to start the fan at medium speed for 2 minutes at regular intervals (every 10 mins.) once the room temperature has reached the level set on the thermostat. It ensures the constant monitoring of the air temperature in the room. It is only used in summer and only if the enabling signal of the water temperature probe is positive. The time function cycle is also executed when the controller is powered (first start-up or voltage reset). Warning: The thermostat and the operating mode selector switch are disabled when the time function is in use. The time function can be used only for units without valves and only in summer.

23.5°C

18.5°C

Set=21°C

Neutral zone

Heating

Cooling

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Fan coil enabling system based on the water temperature

The microprocessor controller starts the fan coil according to the following logic based on the water temperature that is detected by a dedicated probe: Water temperature < 17°C: Cooling mode enabling signal Water temperature ≥ 37°C: Heating mode enabling signal See figs. 11÷15 of this manual for the assembling instructions of the water temperature probe.

Technical data and operation limits Warehouse temperatures: -40°C ÷ +85°C Operation temperatures: 0°C ÷ +40°C Accuracy of temperature probes ± 0,5°C Maximum current on terminal V1, V2 and V3 (fan speed) 1.1A Maximum current on terminal Rand V(valve) 0.15 A The pages that follow illustrate all the possible configurations of the Micropro controller, each of them indicating the relative sequence of the micro-switches, any operational features and specific notes. Choose which of these better applies to the system characteristics and use it as explained.

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Possible configurations The Micropro controller can be set in various way by activating the desired functions amongst those available. The various configurations are obtained by arranging the micro-switches on the electronic PCB accordingly.

C1 (Standard): two pipes System characteristics Number of pipes: 2 Valve: NO Electric heater: NO List of functions activated in configuration 1:

• Room thermostat with air temperature control • Manual in built Cooling/Heating switching mode • Operational enabling signal based on the water temperature • Time function Position of the micro-switches for configuration 1: 1 2 3 4 5 6 7 Off Off Off Off Off Off Off On

Off

C2: two pipe systems– Remote switching mode System characteristics Number of pipes: 2 Valve: NO Electric heater: NO List of the functions activated in configuration 2:

• Room thermostat with air temperature control • Manual remote Cooling/Heating switching mode • Operational enabling signal based on the water temperature • Time function Position of the micro-switches for configuration 2: 1 2 3 4 5 6 7 On Off Off Off Off Off Off On

Off

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C3: Two pipe systems– One valve System characteristics Number of pipes: 2 Valve: YES Electric heater: NO List of the functions activated in configuration 3:

• Room thermostat with ON-OFF valve for two pipe systems • Manual in built Cooling/Heating switching mode • Operational enabling signal based on the water temperature Position of the micro-switches for configuration 3: 1 2 3 4 5 6 7 Off Off Off Off On Off Off On

Off

C4: Two pipe systems– One valve – Remote switching mode System characteristics Number of pipes: 2 Valve: YES Electric heater: NO List of the functions activated in configuration 4:

• Room thermostat with ON-OFF valve for two pipe systems • Manual remote Cooling/Heating switching mode • Operational enabling signal based on the water temperature Position of the micro-switches for configuration 4: 1 2 3 4 5 6 7 On Off Off Off On Off Off On

Off

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C5: Four pipe systems – Two valves System characteristics Number of pipes: 4 Valve: YES Electric heater: NO List of functions activated in configuration 5:

• Room thermostat with ON-OFF valves control for four pipe systems • Manual in built Cooling/Heating switching mode • Operational enabling signal based on the water temperature Position of the micro-switches for configuration 5: 1 2 3 4 5 6 7 Off Off Off Off On Off On On

Off

C6: Four pipe systems – Two valves – Remote switching mode System characteristics Number of pipes: 4 Valve: YES Electric heater: NO List of functions activated in configuration 6:

• Room thermostat with ON-OFF valves control for four pipe systems • Manual remote Cooling/Heating switching mode: • Operational enabling signal based on the water temperature Position of the micro-switches for configuration 6: 1 2 3 4 5 6 7 On Off Off Off On Off On On

Off

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C7: Four pipe systems System characteristics Number of pipes: 4 Valve: NO Electric heater: NO List of functions activated in configuration 7:

• Room thermostat with control over the air temperature • Manual in built Cooling/Heating switching mode • Operational enabling signal based on the water temperature • Time function: Position of the micro-switches for configuration 7: 1 2 3 4 5 6 7 Off Off Off Off Off Off On On

Off

C8: Four pipe systems – Remote switching mode System characteristics Number of pipes: 4 Valve: NO Electric heater: NO List of functions activated in configuration 8:

• Room thermostat with air temperature control • Manual remote Cooling/Heating switching mode • Operational enabling signal based on the water • Time function Position of the micro-switches for configuration 8: 1 2 3 4 5 6 7 On Off Off Off Off Off On On

Off

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C13: Two pipe systems– Automatic switching on water side System characteristics Number of pipes: 2 Valve: NO Electric heater: NO List of functions activated in configuration 13:

• Room thermostat with air temperature control • Automatic Cooling/Heating switching mode based on the water temperature • Time function Position of the micro-switches for configuration 13: 1 2 3 4 5 6 7 Off On On Off Off Off Off On

Off Warning: In this type of configuration the input for the centralised Cooling/Heating switching mode is disabled.

C14: Two pipe systems– One valve – Automatic switching mode on water side System characteristics Number of pipes: 2 Valve: YES Electric heater: NO List of functions activated in configuration 14:

• Room thermostat with ON-OFF valve for two pipe systems • Automatic Cooling/Heating switching mode based on the water temperature Position of the micro-switches for configuration 14: 1 2 3 4 5 6 7 Off On On Off On Off Off On

Off Warning: In this type of configuration the input for the centralised Cooling/Heating switching mode is disabled.

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C15: Four pipe systems – Automatic switching mode on air side System characteristics Number of pipes: 4 Valve: NO Electric heater: NO List of functions activated in configuration 15:

• Room thermostat with air temperature control • Automatic Cooling/Heating switching mode based on the air temperature • Choice of the extempt of the neutral zone • Time function Position of the micro-switches for configuration 15: 1 2 3 4 5 6 7 Off On Off Off Off Off On On

Off Note: The position of micro-switch no. 4 determines the extempt of the neutral zone for the “Automatic Cooling/Heating switching mode based on the air temperature”. Position of micro-switch no. 4 Extempt of the neutral zone ON 2 °C OFF 5 °C Warning: In this type of configuration the input for the centralised Cooling/Heating switching mode is disabled.

C16: Four pipe systems – Two valves – Automatic switching mode on air side System characteristics Number of pipes: 4 Valve: YES Electric heater: NO List of functions activated in configuration 16:

• Room thermostat with ON-OFF valves control for four pipe systems • Automatic Cooling/Heating switching mode based on the air temperature • Choice of the extempt of the neutral zone • Operational enabling signal based on the water temperature • Position of the micro-switches for configuration 16: 1 2 3 4 5 6 7 Off On Off Off On Off On On

Off

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Note: The position of micro-switch no. 4 determines the extempt of the neutral zone for the “Automatic Cooling/Heating switching mode based on the air temperature”. Position of micro-switch no. 4 Extempt of the neutral zone ON 2 °C OFF 5 °C Note: For configurations with the “Automatic Cooling/Heating switching mode based on the air temperature” in Cooling mode, the fan stops when the valve shuts-off. Warning: In this type of configuration the input for the centralised Cooling/Heating switching mode is disabled.

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Micropro installation instructions Warning: The MICROPRO control panel has been specially designed for the fan coils of the FLAT series; if used to control different units make sure that the operation limits are respected. See the paragraph relative to the operation limits.

WARNING To avoid any operation problems, the cables of the probes cannot be installed next to power cables (230V);

Position of the air temperature probe (black) for the FLAT unit.

Setting the micro-switches: 1. Unscrew the screws on the bottom part of the controller cover and remove it. Warning: To facilitate its re-installation, be careful not to modify the position of the rotating knobs (operating mode selector switch and thermostat) and also that of the relative potentiometers fitted on the electronic PCB. 2. Arrange the micro-switches with the sequence corresponding to one of the configurations explained

herein.

Fig.5

List of the micro-switches and of the relative functions. Micro-switch no. Function: Position

OFF ON 1 Cooling/Heating switching: In built Remote 2 Cooling/Heating switching: Manual Automatic

3 Automatic Cooling/Heating switching mode based on the temperature of the: Air Water

4 Extempt of the Neutral Zone for the automatic Cooling/Heating mode based on the air temperature: 5 °C 2°C

5 Valve presence on hydraulic circuit: NO YES 6 Electric heater presence (not available for FLAT): NO YES 7 Number of pipes of the hydraulic circuit. 2 pipes 4 pipes

microswitches

1 2 3 4 5 6 7

On

Off

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Micropro installation instructions The Micropro controller can be installed on either side of the FLAT fan coil unit using a support:

• Remote air temperature sensor (cable length 1.5 m) • Support for installation on the fan coil unit

1- Take off the fan coil unit cabinet after removing the four screws concealed by the flap covers at

either end of the grille (fig.6).

2- Thread the sensor wires through one of the two slots in the support and attach the controller to the

support using the two screws provided (Fig.7). (Figure 7 shows how the controller and support should be assembled if the controller is installed on the right side of the fan coil unit: if the controller is installed on the left side of the fan coil unit, the support will have to be turned by 180°).

Fig.7

Important: check that all of the terminals necessary for the electrical connections provided for in the selected configuration (valve, external auxiliary contacts etc ) are accessible after the support has been mounted in place (refer to relevant wiring diagram);

3- Make the electrical connections according to the diagrams provided in this manual. 4- Once the electrical connections have been made, before completing installation of the Micropro

controller it is recommended to carry out the self-diagnosis procedure to check whether all outputs are functioning correctly (fan at the different speeds, valves and heating element where present): refer to the section below.

Fig.6

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5- Fit the controller-support assembly to the fan coil unit using the bayonet couplings (Fig.8). 6- Important: position the air temperature sensor (black) and water sensor (white) (Figs.12 to 15)

following the directions provided in the relevant sections herein; 7- Set the cabinet back on top of the fan coil unit, securing it with the four screws (fig 9) which have

been previously unscrewed (fig 6) Fig.8 Fig.9

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Autodiagnosis procedure To check the correct operational efficiency of the Micropro controller, when installing it or to search for possible faults, all the outputs foreseen can be operated manually (fan, valves, Electric heater) thanks to the autodiagnosis mode. Proceed as follows to access the autodiagnosis mode and to run the tests: 1. Turn the operating mode selector switch to the “OFF” position. 2. Turn the knob of the thermostat anti-clockwise until it reaches the minimum temperature position: 3. Hold the Cooling/Heating selector down for at least 5 seconds. At this stage both LEDs light up. 4. Within 5 seconds, turn the knob of the thermostat clockwise to the maximum temperature position. The

red LED switches off and the blue LED remains lit to indicate that the autodiagnosis mode has been accessed.

Note: If you wait more than 5 seconds before turning the knob again, the autodiagnosis mode will be automatically exited.

5. In the autodiagnosis mode, each position of the operating mode selector switch corresponds to the simulation of an output, namely:

Position Output Terminals

AUTO Valve N-V

Minimum speed N-V1

Medium speed N-V2

Maximum speed N-V3

Second valve N-RE

By running through the various positions of the operating mode selector switch, the electronic controller outputs can be checked one after the other either by observing the relative component (valve, fan,) or by checking if the corresponding terminals are powered at a voltage of 230 V. Note: If the operating mode selector switch is not moved for more than one minute the autodiagnosis mode is automatically exited. 6. Exit the autodiagnosis mode by turning the operating mode selector switch to the “OFF” position.

Heating mode running LED

Cooling mode running LED

Operating mode selector switch

Thermostat

Cooling/Heating selector

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Position of the air temperature probe (black) for the FLAT unit. You have to position the air probe inside the plastic cochlea (fig 10) Fig 10

Positioning of water temperature sensor (white) for FLAT unit Use the special copper holder for the water sensor and position it as described below, depending on the type of installation. Note: the water temperature sensor is an optional accessory for the Micro wall-mounted controller. • For fan coil units for valveless two-pipe systems, the water sensor must be positioned on the exchanger

(Figs.11 and 12).

Fig.11 Fig.12 • For fan coil units for valveless four-pipe systems, the water sensor must be positioned on the heating

circuit exchanger (Fig.13).

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Fig.13 • For fan coil units for two-pipe systems with valve, the water sensor must be positioned at the valve inlet,

on the branch coming from the plumbing system (Fig.14)

Fig.14 • For fan coil units for four-pipe systems with valves, the water sensor must be positioned at the inlet of

the heating valve, on the branch coming from the circuit (Fig.15).

Fig.15

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Wiring diagram of the Micropro controller for FLAT fan coils Each fan-coil / thermal-ventilating unit requires a switch (IL) on the feeder line with a distance of at least 3 mm between the opening contacts, and a suitable safety fuse (F).

Key of the symbols of the wiring diagram: V1 Minimum speed F Fuse (not supplied) V2 Medium speed IL Line switch (not supplied) V3 Maximum speed CN Fan coil “fast-on” terminal board L Phase RHC Remote Cooling/Heating selector switch (closed contact =

Cooling; open contact = Heating) PE Earth EXT External auxiliary contact (closed contact = OFF; open

contact = ON) N Neutral CRHC Centralised remote Cooling/Heating selector switch RE Valve for additional

heat exchanger M Fan coil motor

V Valve for standard heat exchanger

VHC Solenoid valve

RM Remote control VC Cooling solenoid valve EX Auxiliary contact VH Heating solenoid valve SW Water probe …… Electrical connections to be made by the installer SA Air probe ._._._

.

Part of diagram valid only for the centralised remote Cooling/Heating selector switch (CRHC)

BK Black (Max. speed) MS Flap Microswtich BU Blue (Medium speed) RD Red (Min. speed) WH White (mutual)

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Micropro wiring diagram for FLAT fan coil

Each fan-coil / thermal-ventilating unit requires a switch (IL) on the feeder line with a distance of at least 3 mm between the opening contacts, and a suitable safety fuse (F).

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Company UNI EN ISO 9001 and OHSAS 18001 certified

Galletti S.p.A. reserves the right to change the technical data contained in this document with the aim of upgrading the product, when necessary.