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Summary
INTRODUCTION .......................................................................................................................................................... 3
Hardware Architecture ........................................................................................................................................... 3
SYSTEM STRUCTURE ................................................................................................................................................ 4
TYPES OF SYSTEMS ................................................................................................................................................... 5
VMF-CRP FOR THE MULTICONTROL SYSTEM ................................................................................................ 7
Connections of VMF CRP 1 (control of 3-way valves and sensors) ....................................................................... 8 Connections of VMF CRP 2 (control of immersion heater for domestic hot water) ............................................... 9 Connections of VMF CRP 3 (remote controls) ..................................................................................................... 10
SERIAL CONNECTION MULTI CONTROL ......................................................................................................... 11
USER INTERFACE PANEL MULTI CONTROL ................................................................................................... 12
MAIN SCREEN ........................................................................................................................................................... 13
HEAT PUMP MONITOR SCREEN .......................................................................................................................... 14
FUNCTIONS ................................................................................................................................................................ 15
BASIC USE PROCEDURES ......................................................... ERRORE. IL SEGNALIBRO NON È DEFINITO.
MAIN SCREEN SELECTION ................................................................................................................................... 16
UNIT OVERVIEW: MAIN SCREEN 1.0 .................................................................................................................. 17
UNIT OVERVIEW: PARAMETERS SCREEN 1.1 ................................................................................................. 18
UNIT OVERVIEW: TIME-CLOCK PROGRAMMING SCREEN 1.2 ................................................................. 19
DOMESTIC HOT WATER OVERVIEW: MAIN SCREEN 2.0 ............................................................................ 20
DOMESTIC HOT WATER OVERVIEW: TIME-CLOCK PROGRAMMING DHW 2.1 .................................. 21
DOMESTIC HOT WATER OVERVIEW: ANTI-LEGIONELLA MENU 2.2 ..................................................... 21
USER MENU SELECTION 3.0 .................................................................................................................................. 22
DATE AND TIME MENU: SETTING THE TIME 3.1.1 ........................................................................................ 22
DATE AND TIME MENU: SETTING THE DATE 3.1.2 ........................................................................................ 23
SEASON MENU: SETTING THE SEASON 3.2.1 ................................................................................................... 24
DISPLAY MENU: SETTING THE LANGUAGE 3.3.1 ........................................................................................... 24
DISPLAY MENU: SETTING THE CONTRAST 3.3.2 ............................................................................................ 25
DISPLAY MENU: SETTING THE SCREEN SAVER 3.3.3 ................................................................................... 25
ALARM HISTORY 4.0 ............................................................................................................................................... 26
SETUP MENU 5.0 ........................................................................................................................................................ 27
SETUP MENU: PASSWORD SCREEN 5.1 .............................................................................................................. 27
SYSTEM SETUP MENU: NUMBER OF UNITS 5.1.1.0 ......................................................................................... 28
SYSTEM SETUP MENU: STANDBY UNIT 5.1.1.1 ................................................................................................ 29
SYSTEM SETUP MENU: TYPE OF ROTATION 5.1.1.2 ...................................................................................... 29
SYSTEM SETUP MENU: TYPE OF CONTROL 5.1.1.3 ........................................................................................ 31
DELTA T Control ................................................................................................................................................. 32 FREE Control ....................................................................................................................................................... 33 LOAD Control ...................................................................................................................................................... 34
SYSTEM SETUP MENU: ON/OFF DELAY 5.1.1.4 ................................................................................................ 34
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SYSTEM SETUP MENU: CAPACITY ON/OFF CHILLERS 5.1.1.5 .................................................................... 35
SYSTEM SETUP MENU: ON TEMPERATURE 5.1.1.6 ........................................................................................ 36
SYSTEM SETUP MENU: OFF TEMPERATURE 5.1.1.7 ...................................................................................... 36
UNIT SETUP MENU: HEATING SETPOINT 5.1.2.1 ............................................................................................. 38
UNIT SETUP MENU: COOLING SETPOINT 5.1.2.2 ............................................................................................ 38
UNIT SETUP MENU: SETPOINT COMPENSATION 5.1.2.3 ............................................................................... 39
UNIT SETUP MENU: TYPE OF UNIT 5.1.2.4 ......................................................................................................... 40
DHW SETUP MENU: NUMBER OF HEAT PUMP UNITS FOR DHW 5.1.3.0 .................................................. 41
DHW SETUP MENU: SIMULTANEOUS LOADS 5.1.3.1 ...................................................................................... 42
DHW SETUP MENU: DELAY START IMMERSION HEATER 5.1.3.2 ............................................................. 43
DHW SETUP MENU: VALVE ROTATION 5.1.3.3 ................................................................................................ 44
DHW SETUP MENU: ON/OFF RANGE 5.1.3.4 ...................................................................................................... 44
DHW SETUP MENU: HYSTERESIS DELTA 5.1.3.5 ............................................................................................. 45
DHW SETUP MENU: DEFROST POSITION 5.1.3.7 ............................................................................................. 46
SYSTEM SETUP MENU: REMOTE CONTROL 5.1.4.0 ....................................................................................... 47
SYSTEM SETUP MENU: BAUD RATE 5.1.4.1 ....................................................................................................... 53
SYSTEM SETUP MENU: SERIAL ADDRESS 5.1.4.2 ............................................................................................ 53
SYSTEM SETUP MENU: EXPANSION PRESENT 5.1.4.3 ................................................................................... 53
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INTRODUCTION The Multicontrol is a control system dedicated to simultaneously manage several refrigeration units to:
Control starting, stopping and operating setpoint of a maximum of four units in autonomous mode or as
slaves in a system controlled by a BMS or supervisory system.
Remote control where the controls and information of a refrigeration unit/heat pump unit are centralised.
Hardware Architecture
The Multicontrol system hardware is characterised by the combination of electronic components:
Multicontrol board, with part number 9118368.
VMF-CRP expansion boards, with part number 9113073
Serial interface board for ModBus and supervisor systems or BMS (optional).
Sensor to locate in the DHW tank.
Sensor to locate at the inlet (SIW) or outlet (SUW) of the hydraulic parallel circuit SPLW.
External air sensor KSAE.
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SYSTEM STRUCTURE
Figure 1: System structure for controlling multiple chillers in parallel
Figure 2: System structure as remote panel to chiller
RS485 serial for BMS
RS485 serial for VMF-Multichiller system
VMF
CRP1
VMF
CRP2
VMF
CRP3
SUPERVISOR
SYSTEM
OR BMS
VMF
MULTICONTROL
RS485 serial for BMS RS485 serial for VMF-Multichiller system
VMF
MULTICHILLER
SUPERVISOR
SYSTEM
OR BMS
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TYPES OF SYSTEMS The VMF-Multichiller system is developed to manage the type of systems with configurations like the examples
shown below:
Figure 3: System with four chillers for producing the system water
System load
Decoupler
Primary circuit Secondary circuit
SIW
SUW
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Figure 4: System with four chillers for the production of system water and domestic hot water
VMF-CRP (1) Accessory module for the control of:
• 3-way diverting valve
• System water inlet and outlet sensors (SIW, SUW)
• Domestic hot water tank sensor (SAS)
• Accessory KSAE for external air temperature sensor (SAE)
VMF CRP (2) Accessory module for the control of:
• Electric immersion heater in the domestic hot water tank
VMF CRP (3) Accessory module for the remote control of several functions:
• System On/Off, Alarm reset, Season changeover (through inputs)
• System alarms present, System status (ON/OFF), System season status (HEATING/COOLING), Alarm
present in one of the units
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VMF-CRP for the MULTICONTROL system POWER SUPPLY
• The alternating current power installation must use a transformer with voltage output of 24 Vac with safety
Class II with at least 15 VA rating, for the power supply of only one expansion module, between terminals
G and G0.
• The power supply is functionally isolated from all the I/O and serial interfaces.
• A protective fuse of 800 mA is required for the power supply.
• It is recommended to keep apart the power supply of the expansion board pCOE from the rest of the
electrical devices (contactors and other electromechanical components) within the electrical panel.
• It is necessary to use a ferrite (type KITAGAWA part. n. RI 18-28-10 c0o7d8. 7C7aAreXlX 0) through which
the power supply cable must be twice wound round.
• The minimum cable cross section for the power supply cable must be 1mm.
EXAMPLE ADDRESS 1 EXAMPLE ADDRESS 5
LED signal description
LED red LED yellow LED green description
on on Communication active and functioning
on Sensor error
on Software error, contact Aermec
flashing on Loss of communication (check addresses, cables)
Awaiting system initialisation from the master (max. 30 s)
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Connections of VMF CRP 1 (control of 3-way valves and sensors)
Code Component Input to enable the sensor Available as
SIW Primary hydraulic circuit INLET water sensor ID1 (CLOSED) on terminal J4 Accessory SPLW (1) SUW Secondary hydraulic circuit OULET water sensor ID2 (CLOSED) on terminal J4 Accessory SPLW (2) AE External air sensor ID3 (CLOSED) on terminal J4 Accessory KSAE AS Domestic hot water tank sensor ID4 (CLOSED) on terminal J4 Accessory SDHW
Code Valve controller Output Available as 3VD (1) 3-way diverting valve unit 1 J5 Component NOT supplied 3VD (2) 3-way diverting valve unit 2 J6 Component NOT supplied 3VD (3) 3-way diverting valve unit 3 J7 Component NOT supplied 3VD (4) 3-way diverting valve unit 4 J8 Component NOT supplied
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Connections of VMF CRP 2 (control of immersion heater for domestic hot water)
Code Component Output Available as
RAS Control electric immersion heater for domestic hot water J5 Component NOT supplied
Code Component Input Available as ARE Heater alarm present input ID1 CLOSED= No alarm / ID1 OPEN= Alarm J4 Component NOT supplied PRE Enable heater present CLOSED= Heater present in system / OPEN= No heater in system J4
Component NOT supplied
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Connections of VMF CRP 3 (remote controls)
Output Code Function Status Status
J5 ASG General System Alarm (system alarm present) Closed = System alarm Open = No system alarm J6 SGS General System Status Closed = System is ON Open = System is OFF J7 SSI System Season Status Closed = WINTER Open = SUMMER J8 ASM Unit System Alarm (an alarm present in one of the units) Closed = Alarm present Open = No alarm present
Input Code Function Status Status
ID1 AGI General System Enable Closed = System enabled Open = System disable ID2 RGS Reset General System Closed = Reset system ID3 CCS Control Season Change Closed = WINTER setting Open = SUMMER setting
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Serial connection MULTI CONTROL WARNING: If the Multicontrol is installed in a system controlled through the VMF system any control of the
production of domestic hot water must be done by the Multicontrol (the accessory VMF-ACS is not compatible with
the Multicontrol accessory, hence both cannot be present in the same system).
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User interface panel MULTI CONTROL The accessory MULTICONTROL allows the control and management of up to four chillers (fitted with the
MODUCONTROL electronic board); through this accessory the user can control:
• ON/OFF of the unit (based on the selected logic)
• Reading of chiller parameters (temperatures, pressures, setpoints, etc.)
• Time-clock control (up to two daily settings for each day of the week)
• Control of domestic hot water (production DHW, time-clock control of DHW, anti-legionella cycle, etc.)
• Control of operating mode (cooling or heating mode operation)
• Alarm history (the systems allows the recording of the last 10 system alarms).
Warning: to use some of the system functions it is necessary to use one or more VMF-CRP modules, as shown in
the system schematic.
Key Function
A ON/OFF key
B C D E
Multi-function keys; the associated
functionality changes based on which
screen is shown on the display
F Key to select and confirm (Enter)
G Key to decrease value (-)
H Key to increase value (+)
I White back-lit LCD display128 x 64 pixel
L LED not used
M LED not used
N LED red when signalling alarm present
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MAIN SCREEN Main screen where the principal parameters of the refrigeration units is shown. From this point all other sub-menus
can be accessed. The following describes the icons displayed:
In the “Chiller status” the chillers present in the system are identified and for each of these the following displays
are possible:
• indicates that the chiller is OFF from local or remote control
• indicates that the chiller is in standby mode
• indicates the chiller circulator is active
• indicates that the chiller compressor + circulator is active
• indicates that the chiller is not communicating with the ModBus network
• indicates a chiller fault is present
• indicates that the chiller is in defrost mode
Figure 5: Main screen
General
On/Off
Operating
season Chiller status
Alarm present
Time-clock
present
Day, date, time
System leaving water
temperature
System entering water
temperature
Unit number (U1, U2, U3, U4, MIX)
External air
temperature
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Heat pump monitor screen In this screen the characteristics of the heat pump thermostat controllers is summarised.
System
On/Off
Change tab to show
unit data
To sub-menu of application
MAIN
PAGE
Icon indicating the heat
pump status
Demand (%) of each
chiller thermostat
Capacity (%) actually required
for compressor of each chiller
Entering water
temperature each chiller
Chiller number
Leaving water
temperature each chiller
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FUNCTIONS
Figure 6: Application menu structure
UNIT OVERVIEW
UNIT PARAMETERS
CHILLER TIMER SCHEDULE
MAIN SCREEN
DOMESTIC HOT WATER OVERVIEW
USER SUB-MENU
PASSWORD SCREEN ALARM HISTORY
SET TIME
NUMBER CHILLERS 303
HEAING SETPOINT 101
SET DATE
SET LANGUAGE
SET CONTRAST
SET SEASON
DHW TIMER SCHEDULE
SELECTION MENU
SETUP MENU
SET SCREENSAVER
ANTI-LEGIONELLA
STANDBY CHILLER PRESENT
TYPE OF ROTATION
TYPE OF CONTROL
ON/OFF CHILLERS DELAY TIMER
% CAPACITY CHILLERS FOR ON/OFF
START TEMP CHILLERS
STOP TEMP CHILLERS
COOLING SETPOINT
SETPONT COMPENSATION
NUMBER OF HEAT PUMP UNITS FOR DHW 303
SERIAL ADDRESS
BAUD RATE
ENABLE REMOTE CONTROL 101
PRESENCE SENSORS/VALVES
PRESENCE I/O
SIMULTANEOUS LOADS
DELAY STARTING IMMERSION HEATER
VALVE ROTATION
ON/OFF RANGE
DIFFERTIAL START NEXT HEAT PUMP UNIT
TYPE OF UNIT
TYPE OF DEFROST
RS485 NETWORK STATUS
Technician 303
User 101
LEGEND:
HEAT PUMP MONITOR
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Main screen selection From this screen it is possible to see the required menu.
From the selections of the main screen the following can be accessed:
• UNIT OVERVIEW
• DHW OVERVIEW (displayed if enabled in the system)
• USER MENU
• SETUP MENU
• ALARM HISTORY
Figure 7: Menu selection
Line identifying the
selected menu
Keys used to select the
menu
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Unit overview: main screen 1.0 From the unit overview the operating status of each unit in the system can be seen.
If a chiller alarm is present the unit overview screen becomes:
To change the index value of the chiller to be displayed follow this procedure:
1. Press the key
2. With the keys and increase/decrease the index, range 1 to 4
3. Press the key to confirm the data
Through the keys and the display passes between the previous or next screen of the application.
Index of chiller being
displayed
Unit status
Operating
Leaving unit temperature
macchina
Setpoint temperature
Unit enabling
Present alarm reset key
Active alarm code
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Unit overview: parameters screen 1.1 From the chiller overview main screen the screen for reading the parameters of the chiller can be accessed.
The parameters that can be displayed are:
Parameter Description ANL ANLi
ANR
ANF SRP
ANL-C WRL ANKi
TYPE Type of unit TIA Water inlet temperature TUA Water outlet temperature TSB Coil temperature TGP Discharge gas temperature SIWH Water inlet temperature (condenser)
SUWH Water outlet temperature (condenser)
TAE External air temperature AP High pressure BP Low pressure HC0 Primary circuit compressor operating hours SP0 Primary circuit compressor number of starts REL PRIMARY software version BLD SECONDARY software version SET Unit control setpoint HC1 Secondary circuit compressor operating hours SP1 Secondary circuit compressor number of starts STF Cooling setpoint STC Heating setpoint SAS Domestic hot water setpoint PT Capacity percentage requested by the thermostat PO Capacity provided by the unit (on/off units) or operating frequency (units
with inverter compressors)
Through the keys and the display passes between the previous or next screen of the application.
Line that identifies
the parameter Parameter
Keys to select the
parameter to display
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Unit overview: time-clock programming screen 1.2 For each chiller it is possible to enable the time-clock programming. This allows a maximum of two daily settings for
each day of the week.
It is possible to have chillers with time-clock programmes in a system (the same for each) and other chillers
enabled and operating without any daily restriction. This is all at the discretion of the system user.
To utilise the two time-clock programmes set all the parameters for the first and second daily time-clock
programmes.
To utilise just one time-clock programme leave the parameters as 00:00 in the second time-clock programme.
00:00 23:59 On 1 Stop 1 On 2 Stop 2
Time-clock 1 Time-clock 2
OFF OFF OFF ON ON
00:00 23:59 On 1 Stop 1
Time-clock 1
OFF OFF ON
First daily
time-clock
Second daily time-
clock
Programme day
Chiller/heat pump
index
Key to enable time-clock
programme for the specific
chiller
Copy programme key
for every days of the
week Key to change day of the
week
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To set the time-clock programme follow this procedure:
1. Press the key
2. With the keys and increase/decrease the hour/minutes fields selected
3. Press the key to confirm and save the data
4. Repeat the procedure from step 2 until the field for the minutes to STOP the second time-clock.
Through the keys and the display passes between the previous or next screen of the application.
Domestic hot water overview: main screen 2.0 From the domestic hot water overview the relevant parameters for the production of domestic hot water are
displayed.
In this screen the required temperature for the domestic hot water can be set and can also be linked to the
maximum operating temperature of the heat pump unit present in the system, or not linked from this limit if there is
installed an immersion heater/boiler for DHW.
To change the value of “DHW temperature” follow this procedure:
1. Press the key
2. With the keys and increase/decrease the value, range 20.0 to 70.0 °C
3. Press the key to confirm and save the data
Through the keys and the display passes between the previous or next screen of the application.
DHW
temperature
DHW setpoint
Storage tank
overview
Manual enabling
immersion
heater
Enabling DHW production
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Domestic hot water overview: time-clock programming DHW 2.1 In this screen the production of hot water time-clock can be programmed. This menu is very similar to that of the
chiller: for further information refer to that section.
Through the keys and the display passes between the previous or next screen of the application.
Domestic hot water overview: anti-legionella menu 2.2
To programme the parameters of the anti-legionella cycle:
1. Press the key
2. With the keys and increase/decrease the value of the hour or whether it is enabled/disabled the
day of the week
3. Press the key to confirm and save the data
4. Repeat the procedure from item 2 until the last field (DOM)
Through the keys and the display passes between the previous or next screen of the application.
Start time of anti-legionella
cycle
Day anti-legionella cycle is
enabled
Enabling anti-
legionella cycle
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The anti-legionella cycle brings the temperature of the domestic hot water storage tank up 65 °C for 3 minutes. To
do this the system begins the phase by starting the heat pump units available for heating the water up to their
maximum working temperature. Reaching the end temperature of the cycle is achieved by a second step by
activating the immersion electrical heater fitted in the tank.
User menu selection 3.0 From this screen the user menu to be displayed can be selected.
From the selection of user menu access is made to:
• date/time menu
• display menu
• operating season menu
Date and time menu: setting the time 3.1.1 In this screen the time can be set for the system panel.
To change the hour follow this procedure:
Keys to select the user
menu
Line showing the user
menu selected
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1. Press the key
2. With the keys and increase/decrease the value
3. Press the key to confirm and save the data
4. Repeat the procedure from item 2 until the seconds are modified
Through the keys and the display passes between the previous or next screen of the application.
Date and time menu: setting the date 3.1.2 In this page the date of the system can be set.
To change the date and day follow this procedure:
1. Press the key
2. With the keys and increase/decrease the value or the line
3. Press the key to confirm and save the data
4. Repeat the procedure from item 2 until the modification of the day
Through the keys and the display passes between the previous or next screen of the application.
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Season menu: setting the season 3.2.1 In this screen the operating season of the system can be set.
To change the season follow this procedure:
1. Press the key
2. With the keys and select from the two options: SUMMER, WINTER
3. Press the key to confirm and save the data
Through the keys and the display passes between the previous or next screen of the application.
Display menu: setting the language 3.3.1 In this screen the reference language for the lines shown on the system can be set.
To change the language follow this procedure:
1. Press the key
2. With the keys and select from the five options: Italian, English, French, German, Spanish
3. Press the key to confirm and save the data
Through the keys and the display passes between the previous or next screen of the application.
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Display menu: setting the contrast 3.3.2 In this screen the LCD contrast can be set to improve the visibility of the screens.
To change the value of the contrast follow this procedure:
1. Press the key
2. With the keys and increase/decrease the value of the contrast, range: 0 to 100 %
3. Press the key to confirm and save the data
Through the keys and the display passes between the previous or next screen of the application.
Display menu: setting the screen saver 3.3.3 In this screen the functionality of the screen saver can be set. This function allows the user to set a timer for the
application to force the display of the main screen.
To change the value of the screen saver follow this procedure:
1. Press the key
2. With the keys and increase/decrease the screen saver timer, range: 0 to 60 minutes
3. Press the key to confirm and save the data
The icon present in the screen will be shown as:
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• for screen saver values greater than 0 (screen saver active)
• for screen saver value equal to 0 (screen saver not active)
Through the keys and the display passes between the previous or next screen of the application.
Alarm history 4.0 In this screen the last (maximum 10) system alarms can be seen.
Alarm source Alarm name Description
System Eeprom error Initialisation error of the Multicontrol memory
Unit
Not connected Unit not connected to the RS485 network of the VMF-Multichiller
AL xxx (alarm code given by the unit: see the
alarm code generated by the board)
Alarm defined by the unit
DHW
No anti-legionella The anti-legionella cycle did not terminate correctly
No hot water The DHW production cycle did not terminate correctly
DHW setting error The operating setpoint is greater than the maximum working
temperature of the heat pump unit and there is no immersion heater
VMF CRP 1
Expansion not connected Expansion not connected to RS485 network of VMF-Multichiller
SUW sensor faulty Leaving mixed water temperature sensor faulty
SIW sensor faulty Entering mixed water temperature sensor faulty
SSAN sensor faulty DHW sensor faulty
SAMB sensor faulty External air temperature sensor faulty
VMF CRP 2 Expansion not connected Expansion not connected to RS485 network of VMF-Multichiller
Heater faulty Immersion heater faulty
VMF CRP 3 Expansion not connected Expansion not connected to RS485 network of VMF-Multichiller
Index of the
alarm
history
Line that identifies the system
element that generated the
alarm
Line that identifies the
type of alarm
Alarm history
reset key Time and date of
alarm event
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Setup menu 5.0 In this screen the specific installation/setup menu can be selected.
The user can access the following from this menu:
• system setup
• setup chillers/heat pump units
• setup DHW
• system setup.
Setup menu: password screen 5.1 To access the menus below insert the password relevant to the level of access.
With password:
• 101 (user): only the parameters accessible to the user are displayed
• 303 (technician): displays all the parameters
Field to insert
the password
Line that shows the application
software version
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To enter the password follow this procedure:
1. Press the key
2. With the keys and increase/decrease the selected digit
3. Press the key to confirm the data
4. Repeat item 2 of the procedure until the third digit
System setup menu: number of units 5.1.1.0 In this screen the number of chillers/heat pump units present in the system are shown. Access level: technician
303.
To show the number of units present in the system follow this procedure:
1. Press the key
2. With the keys and increase/decrease the data, range 0 to 4
3. Press the key to confirm the data
Through the keys and the display passes between the previous or next screen of the application.
Legend: Address underlined shows
any standby unit
Unit 1 Unit 2 Unit 3 Unit 4
Number of chillers Address Address Address Address
1 200 // // //
2 // 201 // //
3 // // 202 //
4 // // // 203
Table 1: ModBus addresses of the units present in the system
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System setup menu: standby unit 5.1.1.1 In this screen the presence of any standby chiller/heat pump unit is shown. Access level: technician 303.
Systems with a standby unit have available a unit that is only activated if there is a fault with the main group. The
standby unit is identified in the system with the highest modbus address (see Table 1).
To select the presence of a standby chiller follow this procedure:
1. Press the key
2. With the keys and select the line “PRESENTE” (present) or “ASSENTE” (absent)
3. Press the key to confirm the data
Through the keys and the display passes between the previous or next screen of the application.
System setup menu: type of rotation 5.1.1.2 In this menu the choice of how the units will be activated or deactivated during the control of the system can be
made. Access level: technician 303.
To select the type of rotation follow this procedure:
1. Press the key
2. With the keys and select the line “FISSA” (fixed) or “EQUILIBRATA” (balanced)
3. Press the key to confirm the data
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Through the keys and the display passes between the previous or next screen of the application.
FISSA (fixed): With fixed type of rotation the switch on and switch off sequence is determined as shown in the
figure:
EQUILIBRATA (balanced): This logic balances the operating hours of the units; practically the unit with the least
operating hours is started first, following this logic with the subsequent units.
For example:
T0 start Figure 8: Fixed starting sequence
C 1 C 2 C 3 C 4
Figure 9: Fixed stopping sequence
C 4 C 3 C 2 C 1
T0 stop
C 4
T0 start
C 1
C 2 C 3
Com
pres
sor o
pera
ting
hour
s
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Whilst the stopping sequence the unit with the highest operating hours is stopped first, following the same logic
with subsequent units. This type of rotation ensures that the units are enabled and disabled in a manner to ensure
equal operating hours.
For example:
Note: The parameter “Tipo di rotazione” (type of rotation) is not considered during the production of domestic hot water.
In this mode the rotation control rule is FIFO (first in first out) and is tied to the index (ModBus serial number) of the
unit.
System setup menu: type of control 5.1.1.3 In this screen the control mode required for the system use is selected. Access level: technician 303.
To select the type of control follow this procedure:
C 1
C 2
C 4
Com
pres
sor o
pera
ting
hour
s
T0 stop
C 3
Figure 10: Start/stop sequence during the production of domestic hot water
C 4 C 3 C 2 C 1
T start DHW T stop DHW
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Press the key
1. With the keys and select the line “CARICO” (load), “DELTA T” or “LIBERO” (free)
2. Press the key to confirm the data
Through the keys and the display passes between the previous or next screen of the application.
DELTA T Control
With “DELTA T” control the type of hydraulic system used has to be defined, which can be:
• Single circuit [ ]
• Double circuit [ ]
Specifically, the menu “Tipo di regolazione” (type of control) is shown as in the following figure:
With the control for “DELTA T” the units are controlled in relation to the operating season and the entering and leaving temperature of the units. To use this control method the expansion module VMF-CRP1 has to be
installed. In this mode for each unit it is determined:
Enabling in relation to the system
Enabling in relation to the operating season
Switch on in relation to the trend of water temperature produced by the units and accordingly dictated by
the type of rotation
Operating setpoint (fixed or with compensation)
Unit diagnostics
As noted before, the installer must set the system type for this mode of control (single/double circuit). This parameter is fundamental for the correct control of the units.
Key to change
system type
Icon defining the
type of system
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For double circuit systems and specifically for systems where the secondary circuit water flow is by an independent
pump, the SUW sensor must accurately read the liquid temperature to ensure the correct control operation. In these types of system all the units (and their circulators) can be switched off once the load is met.
For single circuit systems the water flow (and hence reading of the sensor SUW) is ensured by the circulators
present in the units. In these types of systems at least one unit must be operating, even when the load is met. To configure the correct mode of operation for the units the following parameters must be set for this mode:
On/Off Delay Temperature On Temperature Off Type of installation
FREE Control
With the “LIBERA” (free) control the units are controlled independently, and for each is determined:
Enabling in relation to the system
Operating setpoint (fixed or with compensation)
Unit diagnostics
In this mode the units are not forced start/stop in relation to the load, and the units control autonomously in relation
to their own thermostat.
An example of this type of control is four pipe systems (producing simultaneous cold ad hot water).
The DELTA T mode requires the following:
VMF-CRP1 present
SUW sensor active
SIW sensor active
If any one of these is missing the system will change to the FREE mode.
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LOAD Control
With the “CARICO” (load) control are controlled in relation to the operating season and the effective load demand
determined analysing the unit thermostats for the running units. For each is determined:
Enabling in relation to the system
Enabling in relation to the operating season
Enabling in relation to the load demand and according to the sequence determined by the type of rotation
Operating setpoint (fixed or compensation)
Unit diagnostics
To correctly configure the unit operation in this mode the following parameters must be set:
On/Off Delay On/Off Capacity
System setup menu: ON/OFF delay 5.1.1.4 In this screen the start and stop delay timers for the chillers can be selected according to the selected control logic
(for Load or Delta T). Access level: user 101.
To select the delay times follow this procedure:
1. Press the key
2. With the keys and increase/decrease the value, range 0 to 300 s
3. Press the key to confirm and save the data
4. Repeat the procedure from item 2 until the ON->OFF field
Through the keys and the display passes between the previous or next screen of the application.
Delay start timer: shows the required time that must pass from the system capacity request to the enabling of the required unit
Delay stop timer: shows the require time that must pass from the system reaching requested capacity to stopping of the required unit
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System setup menu: capacity ON/OFF chillers 5.1.1.5 In this screen the capacity percentages (obtained from the thermostats of the various refrigeration units) can be set
for the levels to start or stop the next chiller. These parameters are used when Type of control is set as load.
Access level: user 101.
To set the ON/OFF capacities follow this procedure:
1. Press the key
2. With the keys and increase/decrease the value, range 0 to 100 %
3. Press the key to confirm and save the data
4. Repeat the procedure from item 2 until the ON->OFF Next field
Through the keys and the display passes between the previous or next screen of the application.
SUW
ON
/OFF
CH
ILLE
R
STA
TUS
CH
ILLE
R
[s]
[s]
[s]Delay OFF → ON Delay ON → OFF
Capacity level needed to start a further unit: shows the minimum percentage value that must be required from each thermostat of running units before starting the next unit. The capacity of the first unit must reach 80% before starting the second
Capacity level needed to stop a further unit: shows the maximum percentage value that must be required from each thermostat of running units before stopping the last unit. The capacity of the first units must reach 40% before stopping the second
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System setup menu: ON temperature 5.1.1.6 In this screen the start temperature (referring to the system SUW sensor) can be set for the various units in the
system. This parameter is used when the Control type is set as DELTA T.
Access level: user 101.
To set the chiller ON temperature follow this procedure:
1. Press the key
2. With the keys and increase/decrease the value, range -10.0 to 70.0 [°C]
3. Press the key to confirm and save the data
Through the keys and the display passes between the previous or next screen of the application.
System setup menu: OFF temperature 5.1.1.7 In this screen the stop temperature (referring to the system SIW sensor) can be set for the various units in the
system. This parameter is used when the Control type is set as DELTA T.
Access level: user 101.
To set the chiller OFF temperature follow this procedures:
Change parameter for the
operating season
Unit active season setting: shows which season the displayed setpoint refers to
Unit active setting: shows the temperature read by sensor SUW in the secondary circuit as activation threshold for the units (depending on the season the demand is activated above or below the threshold set in this parameter)
Unit selected
Keys to increase/decrease the chiller index
Change parameter for the
operating season
Unit disabling setting: shows the temperature (sensor SIW) of the primary circuit return water considered the stop threshold of the corresponding unit (depending on the season the demand is activated above or below the threshold set in this parameter)
Shows the season the unit refers to
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1. Press the key
2. With the keys and increase/decrease the value, range -10.0 to 70.0 [°C]
3. Press the key to confirm and save the data
Through the keys and the display passes between the previous or next screen of the application.
The temperature control of the chillers/heat pump units can only be carried out with the presence in the system of
the VMF-CRP1 expansion board which monitors the sensors SUW and SIW.
STOP C4
STOP C3
STOP C2
STOP C1
SUW
SIW
[S]
[S]
[S]
[S]
[S]
CH
ILLE
R1
CH
ILLE
R2
CH
ILLE
R3
CH
ILLE
R4
SECONDARY
SUW
SIW
START
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Unit setup menu: heating setpoint 5.1.2.1 In this screen the heating mode leaving water setpoint of the heat pump unit can be set.
Access level: user.
To set the heating setpoint follow this procedure:
1. Press the key
2. With the keys and increase/decrease the value, range 10.0 to 70.0 [°C]
3. Press the key to confirm and save the data
Through the keys and the display passes between the previous or next screen of the application.
Unit setup menu: cooling setpoint 5.1.2.2 In this screen the cooling mode leaving water setpoint of the chiller can be set.
Access level: user.
To set the cooling setpoint follow this procedure:
1. Press the key
2. With the keys and increase/decrease the value, range -10.0 to 20.0 [°C]
3. Press the key to confirm and save the data
Through the keys and the display passes between the previous or next screen of the application.
Keys to change
values
Unit index being
configured
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Unit setup menu: setpoint compensation 5.1.2.3 In this screen the external ambient based setpoint compensation for the chillers/heat pump units can be set. The
sensor to read the external air temperature can be:
1. Sensor S AMB
2. The average of the sensors installed in the units if the S AMB sensor is not present or faulty. Access level:
technician.
To set the compensation setpoint for the chillers/heat pumps units follow this procedure:
1. Press the key
2. With the keys and increase/decrease the value, range +20.0 to 70.0 [°C]
3. Press the key to confirm and save the data
4. Repeat the procedure from item 2 until the Tua2 field
Through the keys and the display passes between the previous or next screen of the application.
Enabling key for the compensation setpoint of the unit
Key to select summer or winter curve
Icon that represents the
slope of the curve
Show whether the data refers to the compensation in cooling or heating mode
Shows the minimum external air temperature for compensation: depending on operating mode (cooling or heating) this value will be connected to the minimum or maximum leaving water value setpoint, as shown in the graphs below
Shows the maximum external air temperature for compensation: depending on operating mode (cooling or heating) this value will be connected to the minimum or maximum leaving water value setpoint, as shown in the graphs below
Shows the minimum or maximum operating setpoint (based on heating or cooling mode) connected to the MINIMUM air temperature
Shows the minimum or maximum operating setpoint (based on heating or cooling mode) connected to the MAXIMUM temperature
Tua1 12°C
Tua2 7°C
Tae1 30°C
Tae2 35°C TAext [°C]
TWout [°C] Tua2 35°C
Tua1 40°C
Tae1 -0.5°C
Tae2 15°C
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Unit setup menu: type of unit 5.1.2.4
In this screen the type of unit installed in the system can be set. Access level: technician.
To set the unit type follow this procedure:
1. Press the key
2. With the keys and select one of the lines: SOLO FREDDO (cooling only), SOLO CALDO
(heating only), POMPA DI CALORE (heat pump unit)
3. Press the key to confirm and save the data
Through the keys and the display passes between the previous or next screen of the application.
This parameter is fundamental for systems with different unit types (cooling only, heating only, heat pump units).
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DHW setup menu: number of heat pump units for DHW 5.1.3.0
In this screen the number of units used for the production of domestic hot water is selected. This parameter also
includes any standby unit (if it has been specified in the relevant parameter System setup menu: standby chiller).
Access level: technician.
To set the number of heat pump units for the production of hot water:
1. Press the key
2. With the keys and increase/decrease the data, range 0 to 4
3. Press the key to confirm and save the data
Through the keys and the display passes between the previous or next screen of the application.
WARNING: to correctly set the unit control for the production of DHW the following instructions must be followed:
Unit modbus address: the units must have a specific modbus address to be correctly controlled by the
MULTICONTROL accessory. This address can only be set on the panel of the unit. The addresses to set depend
on the number and functions of the units in the system. To determine the correct addresses to apply to the units for
the production of DHW refer to the summary table on the next page.
Type of unit: in the event that there is a standby chiller in the system this unit will have the highest modbus
address and all the units have to be enabled for DHW production, hence they must all the heat pump units or
heating only units.
Type of system for DHW production: In this type of system, where a standby unit is required also for the
domestic hot water, it is required that ALL the units controlled from the MULTICONTROL are units suitable for the
production of domestic hot water (HEAT PUMP UNITS or HEATING ONLY UNITS). The standby unit is always the
last unit and the unit with the highest serial address number. This unit is not activated during the production of
domestic hot but will operate only if one or more of the main group are not available.
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Number of
units for
DHW
System with 4 heat pump units System with 3 heat pump units System with 2 heat pump
units
System with 1 heat
pump unit
Add:200 Add:201 Add:202 Add:203 Add:200 Add:201 Add:202 Add:200 Add:201 Add:200
4 // // // // // //
3 // // // //
2 // // // //
1 // // // // // //
Legend: DHW standby unit. DHW unit
Type of system for the production of DHW without standby chiller: The first three types of systems have one or more units for the production of DHW, although there can be other
cooling only chillers. In this case it is mandatory that the units and any cooling only chillers are set with the
remaining available serial addresses.
DHW setup menu: simultaneous loads 5.1.3.1
In this screen simultaneous system loads can be set as enabled (ON) or disabled (OFF).
Access level: user.
To enable or disable simultaneous loads:
1. Press the key
2. With the keys and select the ON or OFF line
3. Press the key to confirm and save the data
Through the keys and the display passes between the previous or next screen of the application.
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If “abilitazione carichi” (loads enabled) is ON the system can consider the case of simultaneous operation between
heat pump unit (intended as compressor and/or supplementary heater mounted on the refrigeration unit) and
immersion heater mounted in the domestic hot water. This method of operation can be used if there are no
electrical power supply limits.
If there are electrical power supply limits, or if electrical consumption is to be minimised, the “abilitazione carichi”
(loads enabled) is set to OFF.
DHW setup menu: delay start immersion heater 5.1.3.2 In this screen the delay start for the immersion heater in the domestic hot water storage tank can be set.
Access level: user.
To set the immersion heater delay start:
1. Press the key
2. With the keys and increase/decrease the data, range 0 to 60 [m]
3. Press the key to confirm and save the data
Through the keys and the display passes between the previous or next screen of the application.
This parameter is used whilst the heat pump unit produces domestic hot water. During this whole cycle a timer is
present which increases in value if the liquid temperature inside the storage tank drops or remains constant. If the
value of “ritardo accensione R.A.S.” (immersion heater delay start) reaches the set value the system starts the
operation of the immersion heater to make up any deficiency from the heat pump unit.
To disable the immersion heater it is sufficient to set the delay parameter to “0”.
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DHW setup menu: valve rotation 5.1.3.3 In this screen the time required for the diverting/mixing valve to switch can be set.
Access level: technician.
To set the valve rotation parameter:
1. Press the key
2. With the keys and increase/decrease the data, range 0 to 120 [s]
3. Press the key to confirm and save the data
Through the keys and the display passes between the previous or next screen of the application.
This parameter is used when the heat pump unit is enabled for the production of domestic hot water. It is a delay
timer in which the unit is disabled during the time the valve switches to avoid a unit trip through reduction of flow
rate.
DHW setup menu: on/off range 5.1.3.4 In this screen the “Banda On/Off” (on/off range) can be seen or modified, which represents the hysteresis between
maximum and minimum temperatures for the domestic hot water. Access level: user.
To set the on/off range ON/OFF:
1. Press the key
2. With the keys and increase/decrease the data, range 0 to 10.0°C
3. Press the key to confirm and save the data
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Through the keys and the display passes between the previous or next screen of the application.
This parameter is used in conjunction with the “Temperatura acqua” (water temperature) to determine the switch on
and switch off threshold for the production of domestic hot water.
DHW setup menu: hysteresis delta 5.1.3.5 In this screen the operating hysteresis for the various heat pump units enabled for the production of domestic hot
water can be set.
Access level: technician.
To set the hysteresis parameter:
1. Press the key
2. With the keys and increase/decrease the data, range 0 to10.0°C
3. Press the key to confirm and save the data
Through the keys and the display passes between the previous or next screen of the application.
The sixth screen of the DHW SETUP allows the setting of a delta to be applied for the domestic hot water setpoint
for the units used in the production of domestic hot water. This function permits (in the case there are several units
for the production of domestic hot water) to off-load the units delegated to the production of DHW, moving the
setpoint of these units by the value specified in this parameter.
DHW SETPOINT - RANGE DHW SETPOINT + RANGE
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In practice this activates in cascade the heat pump units in relation to the effective heating load demand. If the
“delta hysteresis) is set to 0 all the unit will follow the same routine during the production of domestic hot water
cycle.
DHW setup menu: defrost position 5.1.3.7 In this screen the defrost direction which is only by reversing cycle can be set.
SYSTEM: the water flow is directed towards the system. In this case the flow proving check will be disabled for the
time specified in the relevant parameter, to avoid flow switch alarms during the rotation of the valve.
DHW: the flow remains in the DHW circuit.
Access level: technician.
To set the defrost position parameter:
1. Press the key
2. With the keys and select the line IMPIANTO (system) or SANITARIO (DHW)
3. Press the key to confirm and save the data
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Through the keys and the display passes between the previous or next screen of the application.
System setup menu: remote control 5.1.4.0
This screen of the SYSTEM SETUP allows the setting of the type of remote control (if present) to be applied to the
MULTICONTROL. Access level: user.
To set the remote control parameter:
1. Press the key
2. With the keys and select the line NON PRESENTE (not present), DA SERIALE MODBUS (from
Modbus serial line), DA MODULO VMF CRP 3 (from module VMF CRP3)
3. Press the key to confirm and save the data
Through the keys and the display passes between the previous or next screen of the application.
The values available for this parameter are:
FROM MODULE VMF CRP3: Shows that the remote control is from the VMF CRP3 accessory module installed.
For further information refer to the installation section of this manual FROM MODBUS SERIAL LINE: Shows that the system is controlled by a BMS supervisory system. This system is
defined from the list of variables specified in the following pages. NOT PRESENT: no remote control is present.
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Remote control from MODBUS SERIAL LINE
ModBus local network
ModBus supervisor
SUPERVISOR
OR
BMS
Supervisor serial expansion
board. The –Multichiller
controller is a slave of the
supervisor serial network.
A B GND
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MODBUS VARIABLES FOR VMF‐MULTICHILLER CONTROLLER (SYSTEM SETTINGS)
ModBus Variable
Address Access type
Min Value
Max Value
Unit of measurement
ModBusControl
Description 0x03 0x06 0x10
PLANT_ON 0 R/W 0 1 // Si Si Si General system On‐Off
UNITA1_EN 1 R/W 0 1 // Si Si Si Enabling unit 1
UNITA2_EN 2 R/W 0 1 // Si Si Si Enabling unit 2
UNITA3_EN 3 R/W 0 1 // Si Si Si Enabling unit 3
UNITA4_EN 4 R/W 0 1 // Si Si Si Enabling unit 4
ACS_EN 5 R/W 0 1 // Si Si Si Enabling domestic hot water production
ACS_RAS_EN 6 R/W 0 1 // Si Si Si Forced enabling immersion heater for DHW
ACS_SET 7 R/W 200 700 /10 °C Si Si Si Temperature setpoint for domestic hot water
ACS_EN_LEG 8 R/W 0 1 // Si Si Si Enabling anti‐legionella cycle
STAGIONE_FUNZ 9 R/W 0 1 // Si Si Si System operating season
SET_CALDO_M1 10 R/W 200 700 /10 °C Si Si Si Heating setpoint for unit 1
SET_FREDDO_M1 11 R/W ‐100 300 /10 °C Si Si Si Heating setpoint for unit 1
SET_CALDO_M2 12 R/W 200 700 /10 °C Si Si Si Heating setpoint for unit 2
SET_FREDDO_M2 13 R/W ‐100 300 /10 °C Si Si Si Heating setpoint for unit 2
SET_CALDO_M3 14 R/W 200 700 /10 °C Si Si Si Heating setpoint for unit 3
SET_FREDDO_M3 15 R/W ‐100 300 /10 °C Si Si Si Heating setpoint for unit 3
SET_CALDO_M4 16 R/W 200 700 /10 °C Si Si Si Heating setpoint for unit 4
SET_FREDDO_M4 17 R/W ‐100 300 /10 °C Si Si Si Heating setpoint for unit 4
UNITA1_EN_PROG 18 R 0 1 // Si No No Enabling time‐clock for unit 1
UNITA2_EN_PROG 19 R 0 1 // Si No No Enabling time‐clock for unit 2
UNITA3_EN_PROG 20 R 0 1 // Si No No Enabling time‐clock for unit 3
UNITA4_EN_PROG 21 R 0 1 // Si No No Enabling time‐clock for unit 4
ACS_EN_LEG_DAY 22 R 0 127 // Si No No Days enabling the anti‐legionella cycle
ON_OF_LEG 23 R 0 5947 // Si No No Start time anti‐legionella cycle
ACS_EN_PRG 24 R 0 1 // Si No No Enabling time‐clock for production of DHW
SEL_LINGUA 25 R 0 4 // Si No No Display language
CONTRASTO_LCD 26 R 0 100 % Si No No LCD contrast
SCREEN_SAVER 27 R 0 60 s Si No No Screen saver
NUM_MACCHINE 28 R 0 4 // Si No No Number of units present in the system
PRES_RISERVA 29 R 0 1 // Si No No Standby unit present
TIPO_ROTAZIONE 30 R 0 1 // Si No No Rotation type selected for the units
TIPO_REGOLAZIONE 31 R 0 2 // Si No No Control type selected for the units
RIT_ON 32 R 0 360 s Si No No Delay start for next unit
RIT_OFF 33 R 0 360 s Si No No Delay stop for the unit
POT_ON 34 R 0 100 % Si No No Capacity percentage threshold for starting next unit
POT_OFF 35 R 0 100 % Si No No Capacity percentage threshold for stopping next unit
T_START_C 36 R ‐100 300 /10 °C Si No No Start temperature in cooling mode during operation "Regolazione per Delta T"
T_START_H 37 R 200 700 /10 °C Si No No Start temperature in heating mode during operation "Regolazione per Delta T"
T_STOP_C1 38 R ‐100 300 /10 °C Si No No Stop temperature in cooling mode of the first unit during operation "Regolazione per Delta T"
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T_STOP_H1 39 R 200 700 /10 °C Si No No Stop temperature in heating mode of the first unit during operation "Regolazione per Delta T"
T_STOP_C2 40 R ‐100 300 /10 °C Si No No Stop temperature in cooling mode of the second unit during operation "Regolazione per Delta T"
T_STOP_H2 41 R 200 700 /10 °C Si No No Stop temperature in heating mode of the second unit during operation "Regolazione per Delta T"
T_STOP_C3 42 R ‐100 300 /10 °C Si No No Stop temperature in cooling mode of the third unit during operation "Regolazione per Delta T"
T_STOP_H3 43 R 200 700 /10 °C Si No No Stop temperature in heating mode of the third unit during operation "Regolazione per Delta T"
T_STOP_C4 44 R ‐100 300 /10 °C Si No No Stop temperature in cooling mode of the fourth unit during operation "Regolazione per Delta T"
T_STOP_H4 45 R 200 700 /10 °C Si No No Stop temperature in heating mode of the fourth unit during operation "Regolazione per Delta T"
TAE1_E 46 R ‐200 700 /10 °C Si No No External air temperature threshold Px1 during summer operation
TUA1_E 47 R ‐200 700 /10 °C Si No No Leaving water temperature threshold Py1 during summer operation
TAE2_E 48 R ‐200 700 /10 °C Si No No External air temperature threshold Px2 during summer operation
TUA2_E 49 R ‐200 700 /10 °C Si No No Leaving water temperature threshold Py2 during summer operation
TAE1_I 50 R ‐200 700 /10 °C Si No No External air temperature threshold Px1 during winter operation
TUA1_I 51 R ‐200 700 /10 °C Si No No Leaving water temperature threshold Py1 during winter operation
TAE2_I 52 R ‐200 700 /10 °C Si No No External air temperature threshold Px2 during winter operation
TUA2_I 53 R ‐200 700 /10 °C Si No No Leaving water temperature threshold Py2 during winter operation
ENABLE_CLIMATICA 54 R 0 1 // Si No No Enabling ambient based curve
TIPO_MACCHINA_M1 55 R 0 2 // Si No No Type of unit 1
TIPO_MACCHINA_M2 56 R 0 2 // Si No No Type of unit 2
TIPO_MACCHINA_M3 57 R 0 2 // Si No No Type of unit 3
TIPO_MACCHINA_M4 58 R 0 2 // Si No No Type of unit 4
NUM_MAC_ACS 59 R 0 4 // Si No No Number of units for the production of domestic hot water
CONTEMPOR_CAR 60 R 0 1 // Si No No Simultaneous loads
RIT_ACC_RAS 61 R 0 60 m Si No No Delay start immersion heater
DELAY_VALV 62 R 0 120 s Si No No Valve rotation time
BANDA_SET_ACS 63 R 20 100 /10 °C Si No No DHW operating setpoint range
DELTA_SET_ACS 64 R 0 50 /10 °C Si No No DHW operating setpoint delta
TIPO_SBRINAMENTO 65 R 0 1 // Si No No Type of defrost
ABILIT_COMAN_SER 66 R 0 2 // Si No No Enabling remote control
BAUD_RATE 67 R 0 3 // Si No No Baud rate
ADDR_BMS 68 R 0 200 // Si No No Address
MODULO_1 69 R 0 1 // Si No No Presence of expansion module1
MODULO_2 70 R 0 1 // Si No No Presence of expansion module2
MODULO_3 71 R 0 1 // Si No No Presence of expansion module3
Servizio Regolazione e Controllo File MultiControl_Specifiche_SAT_Ed1 Page 51/54
Revision 1 Date 23 October 2012 Author SAT Tipo Specification SAT
MODBUS VARIABLES FOR VMF‐MULTICHILLER CONTROLLER (UNIT and SYSTEM DATA)
ModBus Variable
Address Access type Min Value
Max Value
Unit of measurement
ModBus Control
Description 0x03 0x06 0x10
RESET_ALL_UNITA 100 W 0 1 // Si Si No Forced reset of the units present in the system
TUA_M1 101 R ‐200 700 /10 °C Si No No Leaving water temperature
TIA_M1 102 R ‐200 700 /10 °C Si No No Entering water temperature
TAE_M1 103 R ‐200 700 /10 °C Si No No External air temperature
TGP_M1 104 R ‐30 150 /10 °C Si No No Discharge gas temperature
TSB_M1 105 R ‐30 150 /10 °C Si No No Coil temperature
AP_M1 106 R 0 42 bar Si No No High Pressure
BP_M1 107 R 0 42 bar Si No No Low Pressure
PT_M1 108 R 0 100 % Si No No Thermostat demand
PO_M1 109 R 0 150 Herzt or % Si No No Inverter current frequency/power
SET_REG_IST_M1 110 R ‐200 700 /10 °C Si No No Current control setpoint
STATO_M1 111 R 0 6 // Si No No
Unit status (0:OFF, 1:STAND_BY, 2:POMPA_ON (pump on), 3:COMPRESSORE_ON, 4:SBRINAMENTO (defrost), 5: NON CONNESSO (not connected), 6: PRESENZA ALLARME (alarms present))
STAGIONE_M1 112 R 0 1 // Si No No Unit season (0:freddo (cooling), 1:caldo (heating))
ALLARME_M1 113 R 0 255 // Si No No Alarm code
TUA_M2 114 R ‐200 700 /10 °C Si No No Leaving water temperature
TIA_M2 115 R ‐200 700 /10 °C Si No No Entering water temperature
TAE_M2 116 R ‐200 700 /10 °C Si No No External air temperature
TGP_M2 117 R ‐30 150 /10 °C Si No No Discharge gas temperature
TSB_M2 118 R ‐30 150 /10 °C Si No No Coil temperature
AP_M2 119 R 0 42 bar Si No No High Pressure
BP_M2 120 R 0 42 bar Si No No Low Pressure
PT_M2 121 R 0 100 % Si No No Thermostat demand
PO_M2 122 R 0 150 Herzt or % Si No No Inverter current frequency/power
SET_REG_IST_M2 123 R ‐200 700 /10 °C Si No No Current control setpoint
STATO_M2 124 R 0 6 // Si No No
Unit status (0:OFF, 1:STAND_BY, 2:POMPA_ON (pump on), 3:COMPRESSORE_ON, 4:SBRINAMENTO (defrost), 5: NON CONNESSO (not connected), 6: PRESENZA ALLARME (alarms present))
STAGIONE_M2 125 R 0 1 // Si No No Unit season (0:freddo (cooling), 1:caldo (heating))
ALLARME_M2 126 R 0 255 // Si No No Alarm code
TUA_M3 127 R ‐200 700 /10 °C Si No No Leaving water temperature
TIA_M3 128 R ‐200 700 /10 °C Si No No Entering water temperature
TAE_M3 129 R ‐200 700 /10 °C Si No No External air temperature
TGP_M3 130 R ‐30 150 /10 °C Si No No Discharge gas temperature
TSB_M3 131 R ‐30 150 /10 °C Si No No Coil temperature
AP_M3 132 R 0 42 bar Si No No High Pressure
BP_M3 133 R 0 42 bar Si No No Low Pressure
PT_M3 134 R 0 100 % Si No No Thermostat demand
PO_M3 135 R 0 150 Herzt or % Si No No Inverter current frequency/power
SET_REG_IST_M3 136 R ‐200 700 /10 °C Si No No Current control setpoint
STATO_M3 137 R 0 6 // Si No No
Unit status (0:OFF, 1:STAND_BY, 2:POMPA_ON (pump on), 3:COMPRESSORE_ON, 4:SBRINAMENTO (defrost), 5: NON CONNESSO (not connected), 6: PRESENZA ALLARME (alarms present))
Servizio Regolazione e Controllo File MultiControl_Specifiche_SAT_Ed1 Page 52/54
Revision 1 Date 23 October 2012 Author SAT Tipo Specification SAT
STAGIONE_M3 138 R 0 1 // Si No No Unit season (0:freddo (cooling), 1:caldo (heating))
ALLARME_M3 139 R 0 255 // Si No No Alarm code
TUA_M4 140 R ‐200 700 /10 °C Si No No Leaving water temperature
TIA_M4 141 R ‐200 700 /10 °C Si No No Entering water temperature
TAE_M4 142 R ‐200 700 /10 °C Si No No External air temperature
TGP_M4 143 R ‐30 150 /10 °C Si No No Discharge gas temperature
TSB_M4 144 R ‐30 150 /10 °C Si No No Coil temperature
AP_M4 145 R 0 42 bar Si No No High Pressure
BP_M4 146 R 0 42 bar Si No No Low Pressure
PT_M4 147 R 0 100 % Si No No Thermostat demand
PO_M4 148 R 0 150 Herzt or % Si No No Inverter current frequency/power
SET_REG_IST_M4 149 R ‐200 700 /10 °C Si No No Current control setpoint
STATO_M4 150 R 0 6 // Si No No
Unit status (0:OFF, 1:STAND_BY, 2:POMPA_ON (pump on), 3:COMPRESSORE_ON, 4:SBRINAMENTO (defrost), 5: NON CONNESSO (not connected), 6: PRESENZA ALLARME (alarms present))
STAGIONE_M4 151 R 0 1 // Si No No Unit season (0:freddo (cooling), 1:caldo (heating))
ALLARME_M4 152 R 0 255 // Si No No Alarm code
TUA_MIX 153 R ‐200 700 /10 °C Si No No Mixed leaving water temperature
TIA_MIX 154 R ‐200 700 /10 °C Si No No Mixed entering water temperature
TEMP_AE 155 R ‐200 700 /10 °C Si No No External air temperature sensor
TEMP_ACS 156 R ‐200 700 /10 °C Si No No Domestic hot water temperature
STATO_ACS 157 R 0 1 // Si No No Domestic hot water status (0: NON ATTIVO (not active), 1:ATTIVO (active))
PRESENZA_ALLARMI 158 R 0 0xFFFF // Si No No System alarms present RIASSUNTO_ALLARME 159 R 0 1 // Si No No Flag alarm summary
Remote control from MODULE ACCESSORY
If the “module accessory” remote control is enabled the system allows digital inputs and outputs to integrate with
the application.
The inputs available are:
System enabling input (On/Off)
Unit alarm reset input
Change season input
The outputs available are:
System alarm summary (units, DHW, system, expansion modules)
System status (On/Off)
System season (heating/cooling)
Alarm present in one of the unit
Servizio Regolazione e Controllo File MultiControl_Specifiche_SAT_Ed1 Page 53/54
Revision 1 Date 23 October 2012 Author SAT Tipo Specification SAT
System setup menu: baud rate 5.1.4.1
In this screen the supervisor serial port baud rate can be set. Access level: technician.
To set the baud rate parameter:
1. Press the key
2. With the keys and select the lines 9600, 19200, 38400 bit/s
3. Press the key to confirm and save the data
Through the keys and the display passes between the previous or next screen of the application.
System setup menu: serial address 5.1.4.2
In this screen the supervisor serial port address can be set. Access level: technician.
To set the serial port address:
1. Press the key
2. With the keys e increase/decrease the data, range 0 to 247
3. Press the key to confirm and save the data
Through the keys and the display passes between the previous or next screen of the application.
System setup menu: expansion present 5.1.4.3
Servizio Regolazione e Controllo File MultiControl_Specifiche_SAT_Ed1 Page 54/54
Revision 1 Date 23 October 2012 Author SAT Tipo Specification SAT
This screen of the SYSTEM SETUP allows selecting the setup for the VMF CRP accessories. There can be a
maximum of three of these and each has a particular function. Access level: technician.
To select the presence of expansion modules in the system:
1. Press the key ;
2. With the keys and set if the module is present ( present, not present)
3. Press the key to confirm
4. Repeat the selection until VMF CRP 3
5. Press the key to save in the eeprom.
Through the keys and the display passes between the previous or next screen of the application.
VMF CRP1 present, shows that this accessory module is used to control:
• Up to 4 three way diverting valves for controlling the production of hot water between the system and
domestic hot water
• Sensors for the entering and leaving water (SIW and SUW)
• DHW tank water sensor ACS (SAS)
• Sensors for external air (SAE)
VMF CRP 2 present, shows that this accessory module is used to control:
• An immersion heater for the production of domestic hot water (controls enabling, starting and alarms of the
heater)
VMF CRP 3 present, shows that this accessory module is used to control MULTICONTROL through remote
control. If installed this module offers the possibility of remote control through:
• System On/Off (INPUT)
• Reset alarms (INPUT)
• Change season (INPUT)
• Alarm summary (OUTPUT)
• Current system status (On/Off) (OUTPUT)
• Current system season (OUTPUT)
• Alarms present in one unit (OUTPUT).