Thermocold DOMINO BASIC Series User manual

AIR-WATER AND WATER-WATER UNIT FOR 2 PIPES SYSTEMS
USER MANUAL
Series DOMINO BASIC/MEX/MFX/EASY
Cod. MU –ICHILL–U –EL –REV01 –0315 –UK

User Manual

User Manual
WARNING
Supply the unit at least 24 hours before the initial startup to heat the compressor oil. In conditions of low
water temperature, the pumps could start in order to avoid freezing conditions. In order to avoid the
breaking of heat exchangers due to water hammer be sure to keep to water valves open.
Failure to follow these instructions will void the warranty.

User Manual
INDEX
1. Advanced electronics ..................................................................................................5
2. Display description ......................................................................................................7
3. Buttons description and their functions ..................................................................9
4. On/Off of the unit ......................................................................................................11
5. Set point display ........................................................................................................11
6. Set point editing ........................................................................................................11
7. Dynamic Set Point .....................................................................................................12
8. Alarm display ..............................................................................................................13
9. Alarm reset .................................................................................................................13
10. Remote control of the unit .....................................................................................14
11. Controlling the unit remotely by free contacts ..................................................14
12. Controlling the unit remotely by ModBus protocol ...........................................15
13. Configuration parameters ......................................................................................16
14. Parameters table .....................................................................................................17
15. Alarms .......................................................................................................................19
16. Remote display ........................................................................................................20

User Manual
1. Advanced electronics
The control logic, developed by Thermocold, is able to manage air/water and water/water groups chiller and
heat pump versions.
This control logic, according the type of the unit, is able to handle units with single refrigerant circuit
equipped with two scroll compressors with a proportional step regulation according inlet water temperature
for air-water or water-water units.
On the condensing units, the electronic card will active steps according the number of the activated digital
input by an external thermostat or PLC.

User Manual
Technical Specifications
Power supply
24V AC/DC
Digital inputs
5 free voltage
Analogue inputs
3 NTC + 1 configurable: 0÷5V, 4÷20mA, NTC
Analogue outputs Opto-Insulated
4 configurables: 0÷10V signal, external relay driving
Relay outputs
5 x 5(2) A @ 250V SPST + 1 open collector 12Vdc 40mA max
Remote terminal
Serial outputs
1 RS485 slave with Mod_BUS communication protocol( only with adaptor)

User Manual
2. Display description
Through the LED display, you can monitor and change the status of the unit, using the 6 buttons
positioned in the lower part of the keypad
Available information on display:
By pressing the UP and DOWN keys on the Home screen, you can view the following values:
• "Pb1": Displays the water temperature at the exchanger inlet air-conditioning;
• "Pb2": Displays the temperature of the water leaving the exchanger of air-conditioning;
• "Pb4": Displays the outside air temperature (only for air / water if present);
• "Pb3": Display the condensing pressure in cooling mode, and the evaporating pressure in heating
mode;
“Pb4”: Displays the temperature of the water leaving the exchanger of source side (only for
water/water if present).
In addition to the input buttons in the menus listed below, are also present in the home screen and
buttons that allow you to activate the machine operation respectively in summer and winter
operation.
The display shows OnC when the unit is on and chiller, OnHwhen the unit is turned on in heat pump and
OFF when the unit is key to OFF.
Description of the icons on the display:

User Manual

User Manual
3. Buttons description and their functions
The controller is provided with six buttons to interact with user and installer parameters.
Here below the description of the accessible operations through the buttons.
Press and release in the main display:
It allows you to visualize the chiller (label SETC) or heat pump (label SetH)
set point
Press and release 2 times in the main display:
If the energy saving or dynamic set point is enabled for machines without
storage, the icon Vset is lit and the display shows the work real set
Press for 3 seconds and release in the main display:
It allows you to edit the chiller / heat pump set point
Press and release in the ALrM menu:
It allows you to reset the alarm (if this alarm can be reset) from the menu
ALrM
Press and release:
from the main display it allows you to show the values of the configured
probes (temperature / pressure) in the upper display, and the corresponding
label in the lower display.
Press and release in the PrG menu:
it allows to slide in the parameters folders (ST, CT, etc.) and in the
parameters list.
In parameter editing phase, it increases the value.
Press and release:
from the main display it allows you to show the values of the configured
probes (temperature / pressure) in the upper display, and the corresponding
label in the lower display.
Press and release in the PrG menu:
it allows to slide in the parameters folders (ST, CT, etc.) and in the
parameters list.
In parameter editing phase, it increases the value.
Press and release:
It provides access to menu functions
Press for 3 seconds and release:
it allows you to adjust the watch in the provided models.
Press and release in the PrG menu:
it quits the parameter change.

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Press and release:
it allows you to switch on the machine on heat pump or select standby mode
Press and release:
it allows you to switch on the machine on chiller or select standby mode
Some controller functions are available through the multiple keys simultaneous pressure; following are the
combinations accepted by the controller.
+
Simultaneous pressure of buttons for 3 seconds:
it allows to access to parameters programming
+
Simultaneous pressure of buttons:
1. it allows to quit from parameters programming
2. the simultaneous extended pressure of the buttons active the
manual defrost

User Manual
4. On/Off of the unit
Pressing or for about three seconds it can switch on the machine in chiller or heat pump
mode. During these 3 seconds, the selected mode led flashes.
To change machine mode, for example to pass from chiller to heat pump mode, it must passing to the
standby mode before.
If the controller is on, the extended pressure on the button of the current mode (chiller or heat pump)
forces the machine on standby.
In standby mode, you can still to enter in menu to change the parameters.
Alarm management is enabled also in standby mode; alarms that occur are equally shown.
5. Set point display
Pressing and releasing the button, it can see the setpoint value, SetC (set chiller) if the machine is
on the chiller mode, or SetH (set heat pump) if the machine is on the heat pump mode.
Pressing and releasing the button when the machine is on the standby mode, it is possible to
display both set points.
6. Set point editing
1. Press the key at least for 3 sec;
2. The set point will display blinking;
3. To modify set point value, press and ;
4. Press the key, or wait the timeout to save the new value and to quit from programming;

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7. Dynamic Set Point
Enabling the Dynamic Set Point and setting the appropriate parameters for the increase or decrease of
the set point and the range of outdoor temperatures in which this feature must be active, the table in
Chapter 18 under SD the controller will change the set point continuously according to a law proportional.
With this function you can change the set point in order to ensure, to changing external conditions,
increased comfort or higher efficiency of the unit.
Below there is an example about the increase in efficiency achieved by enabling this function.
The Dynamic Set Point is available only for air-water versions equipped with external air probe.

User Manual
8. Alarm display
Enter to the function menu:
1. Select “ALrM” function using or ;
2. Press and release ;
3. The pressure on or allows to show active alarms.
Press the Menu key or wait the timeout, to exit to this visualization.
9. Alarm reset
1. Enter to the function menu;
2. Select the function “ALrM”;
3. Press ; lower display shows the alarm while the upper display shows the label rSt if the
alarm is resettable, or NO if it isn’t. Using or you can slide and show all active
alarms;
4. Press on the label rSt to reset alarm and pass to the next;
5. Press the Menu key or wait the timeout, to exit to this visualization.

User Manual
10. Remote control of the unit
It is possibile to control the unit remotely with two different methods:
Free contacts on the user terminal (X);
ModBus protocol on RS485 slave;
Remote keypad
11. Controlling the unit remotely by free contacts
On the X user terminal there are four free terminals where you can connect any type of temperature control
device able to provide a current pulse to close the relay for the unit activation.
The terminals are those with the numbers 6, 20, 22B, 23 and 29, on the X user terminal (always refer to the
wiring diagram included), this contact is generally a normally open contact.
With these contacts you can enable remote On/Off, S/W change.
To enable the remote S/W changing you need modify CF28.
On the same terminal are also available free contacts for external reporting of general alarm.

User Manual
12. Controlling the unit remotely by ModBus protocol
On the control device installed on the unit, an input is available for serial connection on RS485 port with
ModBus protocol, to use this type of connection it is necessary a TTL/RS485 adaptor.
Observe the wiring diagram below, observing a bus type connection, and avoiding to create stars.
You can use the master and slave RS485 port, depending on the location of the instrument in the network.
To connect to the devices to be controlled simply use two minimum cross-section of 0.5 mm2 plus screen,
use the input GND only for communication problems.

User Manual
13. Configuration parameters
Controller parameters grouped in functional folders (CF = configuration, CO = compressor,…) with a specific
label each.
The generic group ALL contain all controller parameters.
There are 3 different level: user level without password and the other two, only for authorized technician,
available with password.
How to enter in “Pr1”:
1. Press and for some seconds;
2. Icons flash and upper display shows “ALL” (generic parameters group);
3. Slide the parameters groups using and ;
4. Select the group that contains parameters to edit. Pressing the set button, you can enter in the
parameters list of that group.
Lower display shows parameter label and the upper its value.
5. Select parameter;
6. Press the key to eneble the edit;
7. You can edit the value using or ;
8. Press the button to save the new value and to move to the next;
9. To exit, press the key, when you are in parameters viewing (not during the change with
blinking value), or wait the timeout.
NOTE:
The new value is saved also, when you quit because of timeout without pressing the button.

User Manual
14. Parameters table
The parameters are grouped by macro-groups, as follows:
ST
Thermoregulation parameters
SD
Dynamic set point parameters
CF
Remote S/W & Automatic Change Over
Thermoregulation parameters
Parameters
Description
min
max
u.m.
Risolution
ST1
Summer set point
ST05
ST06
°C/°F
dec/int
ST4
Winter set point
ST07
ST08
°C/°F
Dec/ int
Dynamic set point
Parameters
Description
min
max
u.m.
Risolution
Sd1
Dynamic set point
0=disabled
1=enabled
0
1
°C
Sd2
Summer dynamic set
point offset max
-30.0
30.0
°C
Dec
Sd3
Winter dynamic set point
offset max
-30.0
30.0
°C
Dec
Sd4
Summer set external air
temperature
-50.0
110
°C
Dec
Sd5
Winter set external air
temperature
-50.0
110.0
°C
Dec
Sd6
Summer differential
external air temperature
-30.0
30.0
°C
Dec
Sd7
Winter differential
external air temperature
-30.0
30.0
°C
Dec
Remote S/W & Automatic Change Over
Parameters
Description
min
max
u.m.
Risolution
CF28
S/W Change
0 = By Keypad
1 = By Digital Input
2 = By Analogic Input
0
2

User Manual
CF29
Set Automatic Change Over
-50.0
110.0
°C
Dec.
CF30
Differential Automatic
Change Over
0.1
25.0
°C
Dec.
CF35
Remote keypad
0 = Not present
1 = Present
0
1

User Manual
15. Alarms
The controller is able to identify all alarms that may damage the normal operation of the machine. For each
alarm code, the controller performs a given action.
Below is a table with the alarm codes.
Alarm code
Description
P”x”
Failure on probe “x”
A01
High pressure switch alarm
A02
Low pressure switch alarm
A05
High pressure alarm from transducer
A06
Low pressure alarm from transducer
A07
Antifreeze alarm
A08
Plant side flow alarm
A19
Source side flow alarm
A09
Compressor 1 overload
A10
Compressor 2 overload
A11
Condenser fan overload
A17
Evaporator pump overload
A18
Condenser pump overload
A12
Defrost alarm
A13
Compressor 1 maintenance request
A14
Compressor 2 maintenance request
A15
Evaporator pump maintenance
request
A20
Condenser pump maintenance request
A16
High temperature evaporator water
inlet
ACF”x”
Configuration alarm “x”
FErr
Working alarm condensino units
AFR
Phases sequence alarm
ALOC
Generic alarm 1

User Manual
16. Remote display
The remote terminal is connected directly to the controller connectors designed for the remote keypad,
paying particular attention to the polarity of the connections.
Wrong wiring may cause serious damage to the keyboard or controller.