AERMEC PGD1 User manual

22/05 – 5723812_00
Translation of Original instructions
www.aermec.com
User manual
Range a/w scroll
 CARD PCO5  PANEL PGD1

This marking indicates that this product should not be disposed with other household wastes throughout the EU. To prevent possible harm to the envi-
ronment or human health from uncontrolled disposal of Waste Electrical and Electronic Equipment (WEEE), please return the device using appropriate
collection systems, or contact the retailer where the product was purchased. Please contact your local authority for further details. Illegal dumping of
the product by the user entails the application of administrative sanctions provided by law.
All specications are subject to change without prior notice. Although every eort has been made to ensure accuracy, Aermec shall not be held liable for any errors or
omissions.
SAFETY CERTIFICATIONS
Dear Customer,
Thank you for wanting to learn about a product Aermec. This product is the result of many years of experience and in-depth engineering research, and it is
built using top quality materials and advanced technologies.
The manual you are about to read is meant to present the product and help you select the unit that best meets the needs of your system.
However, please note that for a more accurate selection, you can also use the Magellano selection program, available on our website.
Aermec Aermec, always attentive to the continuous changes in the market and its regulations, reserves the right to make all the changes deemed necessary
for improving the product, including technical data.
Thank you again.
AERMEC S.p.A.

3
TABLE OF CONTENTS
1. User interface (PGD1).......................................................................p.5
Start-up procedure................................................................................p.5
Function of the PGD1 control panel keys......................................p.5
Menu structure........................................................................................p.6
User operating procedures.................................................................p.7
2. Main menu.............................................................................................p.8
General monitor .....................................................................................p.8
System monitor.......................................................................................p.8
Circuit monitors......................................................................................p.8
Power demand monitor.......................................................................p.8
Free cooling monitor ............................................................................p.9
Glycolfree monitor.................................................................................p.9
MASTER unit monitor ...........................................................................p.9
Total recovery monitor...................................................................... p.10
DK monitor (only on units with 2 separate gas-side
circuits).................................................................................................... p.10
3. Input/output menu........................................................................ p.10
Fan monitor........................................................................................... p.10
Outside temperature monitor........................................................ p.10
Defrosting monitor............................................................................. p.11
Multifunction input monitor........................................................... p.11
I/O Monitor........................................................................................... p.11
4. Input and output............................................................................. p.12
Analogue inputs.................................................................................. p.12
Digital inputs ........................................................................................ p.12
Digital outputs ..................................................................................... p.12
Analogue outputs............................................................................... p.13
Inputs and outputs (uPC medium expansion for Chiller
with Freecooling/GlycolFree or Recovery)................................. p.13
Inputs and Outputs (pCOE Expansion for NRL, NRB(Large
50Hz),NLC,NYB,NRV,BRB Heat Pumps and Two-circuit)......... p.14
Inputs and outputs (pCOE expansion for DK versions) ......... p.14
Inputs and Outputs (pCOE expansion for Motor
condensing) .......................................................................................... p.15
Inputs and Outputs (pCOE Expansion for NYB/NRV) ............. p.15
Inputs and Outputs (pCOE Expansion for“NRB0282-0754”,
NRB Large 60Hz Two-circuit)........................................................... p.16
Inputs and outputs (pCOE expansion for“Variable Primary
Flow”)....................................................................................................... p.16
5. ON/OFF menu................................................................................... p.17
General On/O..................................................................................... p.17
6. System menu..................................................................................... p.17
Selecting the system operating mode........................................ p.17
Setting the values for the primary sets ....................................... p.17
Setting the values for the secondary setpoints........................ p.18
Setting the time bands (a) and (b)................................................ p.18
Set the time bands (c) and (d) ........................................................ p.18
Copy/paste time bands..................................................................... p.18
Setting the season change from the calendar (heating)...... p.19
Setting the season change from the calendar (cooling)....... p.19
7. Recovery menu................................................................................. p.19
Enabling recovery ............................................................................... p.19
Set the recovery set value................................................................ p.19
8. Clock menu......................................................................................... p.20
Setting system date and time......................................................... p.20
Setting the automatic summer/winter time change............. p.20
Setting the public holidays on the calendar ............................. p.20
9. Installer menu ................................................................................... p.21
Password to access the installer menu (0000).......................... p.21
Enables system on/o from digital input (ID3 PCOE) ............ p.21
Setting the BMS 1 parameters........................................................ p.21
Enable change over and on/o by supervisor ......................... p.21
Sets the BMS2 parameters............................................................... p.21
Setting thermostat regulation........................................................ p.22

4
Sets the logic for the setpoint and dierential in cooling
mode........................................................................................................ p.22
Sets the logic for the setpoint and dierential in heating
mode........................................................................................................ p.22
Climatic curve conguration in cooling mode......................... p.22
Climatic curve conguration in heating mode ........................ p.22
Total recovery conguration........................................................... p.23
Anti-freeze alarm conguration..................................................... p.23
Managing the pumps........................................................................ p.23
Congure anti-freeze management via the pump................. p.23
Conguration of the anti-freeze alarm on the total
recovery ................................................................................................. p.24
Congure fans at low temperatures............................................. p.24
Sets pump start-up for anti-freeze................................................ p.24
Multi-function input conguration (U3)..................................... p.24
Conguration of power limitation for input (U3) .................... p.24
Conguration of variable setpoint for input (U3).................... p.25
Conguration of the NTC signal for input (U3)......................... p.25
Congure night mode control ....................................................... p.25
Conguration of the supplementary electric heaters ........... p.25
Sets the boiler as a replacement.................................................... p.25
Conguration of heater integration or replacement ............. p.25
Compressor hour counter monitor............................................... p.26
Compressor start-up monitor......................................................... p.26
Conguration of the fan speed...................................................... p.26
Congure Master Slave ..................................................................... p.26
Conguration of the fan speed in free cooling ........................ p.27
Free cooling conguration (yield control).................................. p.27
Management of the valves on the NYB/NRV unit ................... p.27
VPF management (general parameters)..................................... p.27
VPF management (Bypass 1 parameters)................................... p.27
VPF management (Bypass 2 parameters)................................... p.28
Unit information monitor................................................................. p.28
EVD valve information monitor ..................................................... p.28
Sets the interface language............................................................. p.28
Conguration of the units of measure ........................................ p.28
Congures the installer menu password.................................... p.28
10. Alarm...................................................................................................... p.29
Control of alarms................................................................................. p.29
Alarm history ........................................................................................ p.29
List of alarms......................................................................................... p.30

5
1 USER INTERFACE PGD1
The command panel of the unit allows the rapid setting of the working parameters
of the machine, and their visualisation. The card stores all the default settings and
any modications.
The installation of the remote panel PGD1 makes it possible to copy from remote all
the functions and settings available on the machine.
After the absence of voltage for any period of time, the unit is able to start up again
automatically, maintaining the original settings.
The main user interface is a graphic monitor with six navigation keys; the displays
are organised with a menu hierarchy, which is activated by pressing the navigation
keys. The default view of these menus is represented by the main menu; you can
navigate between the various parameters by using the arrow keys on the right-
hand side of the panel; these keys are also used to change the selected parameters.
1.1 STARTUP PROCEDURE
After powering the unit, the control card will perform preliminary operations before
it is ready to be used; these initial procedures last about 60 seconds before they are
complete; two windows are displayed during the initial loading procedures (a start
window and one for selecting the system language); these windows are specied
below in the table.
NB: the system language can be set in the window shown at start-up, or
at any moment by changing the window contained in the installer menu.
Start-up procedure:
16sWait please
This window indicates the seconds remaining until the software loaded in the unit
starts up (switching to the system language selection);
7
Language:
Push ENTER for change
ESC to conrm
ENGLISH
Time show mask:
Installer
This window makes it possible to select the language with which the system is
started.
1.2 FUNCTION OF THE PGD1 CONTROL PANEL KEYS
Function of the PGD1 control panel keys:
: Displays the list of active and historical alarms (red LED on = active alarm);
: Pressing this button activates menu navigation (orange LED lit = winter oper-
ation mode active; orange LED ashing = defrosting in progress);
: Pressing this key returns to the previous window;
: Pressing this key can have dierent functions:
— Pressing this key when navigating menus/parameters passes to the next menu/
parameter;
— Pressing this key when changing a parameter increases the value of the select-
ed parameter;
: Pressing this key can have dierent functions:
— Pressing this key when navigating menus enters the selected menu;
— Pressing this key when navigating parameters selects the displayed parameter
and enters change mode;
— Pressing this key when changing a parameter conrms the change to the value
of the selected parameter;
: Pressing this key can have dierent functions:
— Pressing this key when navigating menus/parameters passes to the previous
menu/parameter;
— Pressing this key when changing a parameter decreases the value of the select-
ed parameter;

6
1.3 MENU STRUCTURE
All the functions for managing the unit as well as the information about its opera-
tion are displayed on the unit control panel; all the functions and information are
organised into windows, which are in turn grouped in to menus.
When the unit is operating normally, a main menu is displayed, which is used to
select other operating menus.
The menus are displayed via the rotation of the icons that represent them; once
the desired icon is selected, the select menu opens, and it is possible to display or
change the corresponding parameters. The procedure for navigating the menus, or
changing the parameters, is explained in detail in the chapter "Operational utilisa-
tion procedures", to which reference is made for more information.
The image shows the relationships between the various menus and the keys used
for navigation.
NB:The following pages show all the masks contained in the menus availa-
ble to the user; Tampering with the parameters in the installer menu could
cause the unit to malfunction, therefore it is recommended to have these
parameters changed only by personnel assigned to unit installation and
conguration.
Menu icons:
IN/OUT: This menu contains advanced information about operating the unit;
ON/OFF: This menu is used to activate or deactivate the unit; it also provides
state information;
System: This menu is used to set the operating mode, the setpoints for water
production and the time bands to be applied to the system;
RECOVERY (if present in the unit):This menu allows to set the parameters re-
lated to the recovery management;
CLOCK: This menu contains the time settings for system management (date
and time, calendar);
INSTALLER: This menu contains settings useful for the installer (Digital input
enabling, BMS conguration, adjustments, pumps, etc ...);
NB: this menu is password protected. The value to be set for access is: 0000.
ASSISTANCE: This menu is not accessible except by authorized sta;
MANUFACTURER: This menu is not accessible except by authorized sta;

7
1.4 USER OPERATING PROCEDURES
To check or modify the operating parameters of the unit it is necessary to use the
interface of the control panel on the unit.
The basic operations that the user must be capable of, for the correct use of the
unit, are:
— Moving between menus;
— Selecting and modifying a menu.
Moving between menus
To move between the menus, the order in which they are displayed is shown in the
previous page, enter the menu selection mode by pressing the key ;
Once in the menu selection mode it is possible to move between menus using the
arrow keys: the key to move to the previous menu, and the key to move
to the next menu:
When the desired menu is seen press the key to enter the menu. Press the key
to return to the menu selection mode:
Selecting and modifying a menu
Once in the menu selected, by following the procedure, it is possible to move be-
tween the screens using the arrow keys: the key to move to the previous pa-
rameter, and the key to move to the next parameter:
When the desired parameter is seen press the key to enter the parameter. To
exit the parameter and return to the parameter selection mode press the key .
WARNING: Once a parameter is selected by pressing the key , the pa-
rameter selection mode is automatically accessed.
In this mode the desired parameter values can be set with the following procedure:
1. Pressing the key causes a ashing cursor to appear on the rst modiable
eld of the parameter. If no modiable elds are displayed then the cursor will
not appear.
2. Pressing the key or the key , the value of the eld can be increased
or decreased;
3. Pressing the key conrms the modication of the eld value, saving it in
memory.
Note: On the basis of the type of parameter selected the number of modiable elds
can change.

8
2 MAIN MENU
2.1 GENERAL MONITOR
This mask is used to display the unit's general status:
9.8°C
15.0°C
EV CN
Aermec
91%
91%1
1
Mix
91%
1
C2:C1:
Fri 08:35
— Current date and time
— Evaporator (EV) output temperature;
— Evaporator (EV) input temperature; when it is just below the value relative to
the evaporator input temperature, the icon of the currently active pump will
appear (with the relative number);
— Percentage of power (displayed graphically with a bar to the right of the evapo-
rator) requested by the system;
— Fan speed; percentage value displayed to the right of the condenser;
— Circuit 1 (C1) or 2 (C2) compressor status;
— Pump active: this icon appears if the unit’s pump is running; if the unit has
several pumps, the number next to the icon indicates which one is active.
NB: some icons can appear at the bottom of this window, indicating cer-
tain system states:
— : anti-freeze heater activation;
— : Indicates that low output temperature anti-freeze prevention is active
(turns o the compressors)
— : Indicates that the ow switch is open. The compressors are turned o and
the pumps release the ow switch
— : indicates that the compressor is on;
— : indicates that the compressor is o;
— : indicates a compressor alarm;
— : Indicates that high pressure capacity control is active;
2.2 SYSTEM MONITOR
This mask is used to display the system's general status:
37.0°C
100.0% 15.0%
84.7%100.0%
5.0°C
7.0°C
Setpoint
Di.
Outlet Temp.:
Ep Ei
Att:Req.:
Plant
— Current working setpoint;
— Current working dierential;
— Temperature probe for machine regulation;
— If a PI function is active, also the proportional factor “Ep”and the integral factor
“Ei” will be displayed;
— Requested percentage of power and percentage of power actually active on
the system side;
NB: some icons can appear at the bottom of this window, indicating cer-
tain system states:
— : system chilled water production;
— : system hot water production;
— : time bands active;
— : indicates that the low charge function is active;
— : multifunction input;
2.3 CIRCUIT MONITORS
This mask is used to display the cooling circuit's general status; if the unit has mul-
tiple circuits, each will have a dedicated window:
18.9bar 31.8°C
6.4bar -2.6°C
14.0°C
75.8°C
CP1: 0s
CP2: 0s
CP3: 0s
AP: Tc:
Circuit 1
BP: Te:
T. Liquid.:
Discharge Temp.
— AP: high pressure
— BP: low pressure
— Tc: condensation temperature
— Te: evaporating temperature
— T.Liquid: liquid temperature
— Pressing line Gas T.: compressor pressing line gas temperature
The status of the compressors can be:
— : indicates that the compressor is o, the (remaining) time to satisfy the min-
imum OFF time is indicated to the side;
If ashing = Compressor switched o but will soon be switched on.
— : indicates that the compressor is on, the (remaining) time to satisfy the min-
imum ON time is indicated to the side;
2.4 POWER DEMAND MONITOR
This mask is used to display the data related to the power demand on the indicated
circuit; if the unit has multiple circuits, each will have a dedicated window:
100.0%
50.0%
50.0%
0%
0s
Circuit 1:
Circuit 2:
Total require
Circuits
Heaters:
Time between starts:
— Total thermostat request;
— Power delivered by circuit 1 and 2;
— Resistance: This is the percentage of integral resistance active at that moment
(only visible with Integral resistance conguration);
— Seconds remaining until the next compressor is switched on.

9
2.5 FREE COOLING MONITOR
This mask is used to display the status of the free cooling circuit:
FC
95%
15.1°C
95/100%
10.9°C
0%
15.1°C 11.7°C
11.7°C
0/100%
Power FC:
Power FC:
OFF
Tot:
Freecooling
Tot:
Freecooling
— Activation of the 3-way valve with the display of moving arrows for pump status
and water circulation;
— Power delivered by the free cooling based on that available;
— Operating status;
— Tot: total power as a percentage delivered by the unit. If only free cooling, corre-
sponds to the total power delivered by free cooling, if mixed operation the total
power is the sum of the power delivered by free cooling and the compressors;
— Display of the values of the free cooling input (lower left), evaporator input (if FC
on, upper right) and evaporator output (lower right) probes;
Possible operating status:
— OFF (unit o);
— FC (unit only operating in free cooling);
— FC+CP (unit in mixed operation);
— CP (unit operating with compressors only);
WARNING: this mask is available on free cooling units.
2.6 GLYCOLFREE MONITOR
This mask is used to display the status of the glycolfree circuit:
FC
96/100%
96%
15.1°C
10.9°C
Glycol Free
OFF
0/100%
0%
15.1°C
15.1°C
15.1°C
10.9°C
15.1°C
15.1°C
GlicoleFree
GlicoleFree
Total:
Power FC:
Power FC:
Total:
— Activation of the branch containing glycol with the display of moving arrows for
pump status and water circulation;
— Power delivered by the free cooling based on that available;
— Tot: total power as a percentage delivered by the unit. If only free cooling, corre-
sponds to the total power delivered by free cooling, if mixed operation the total
power is the sum of the power delivered by free cooling and the compressors;
— Display of the values of the free cooling output (upper left), free cooling input
(lower left), intermediate evaporator (upper right) and evaporator input (lower
right) probes;
— Operating status;
Possible operating status:
— OFF (unit o);
— FC (unit only operating in free cooling);
— FC+CP (unit in mixed operation);
— CP (unit operating with compressors only);
WARNING: this mask is available on glycolfree units.
2.7 MASTER UNIT MONITOR
This mask is used to display the data related to the system's total power demand
and the relative power percentages divided among the units connected to the sys-
tem:
---°C
100.0%
100.0%
100.0%Circuit 2:
Circuit 1:
Total require
Common Outlet:
Master
— Common output (optional): probe water temperature on the common output
of the two master and slave unit outputs;
— Demand: power calculated by the Master unit thermostat that will be distribut-
ed between the two units;
— Unit 1: percentage power requested of the Master unit;

10
— Unit 2: percentage power requested of the Slave unit;
NB: this mask is only available on the Master unit, if the system has a Mas-
ter/Slave conguration with multiple units.
2.8 TOTAL RECOVERY MONITOR
This mask is used to display the status of the total recovery:
15.1°C
15.1°C
0%
O unit
Total Recovery
Inlet water:
Out Total Rec.:
Total require:
— Display of the water temperature value of the total recovery input probe;
— Display of the water temperature value of the total recovery output probe;
— Total recovery status:
ow switch open (water is not circulating in the hydraulic circuit of the recovery
system and therefore it is disabled);
enabled (water is circulating in the hydraulic circuit of the recovery system and
therefore it is enabled);
general o (the whole unit is in stand-by), o from the display (general disabling of
the unit from the pGD1 button);
— Demand: this value indicates the actual power requested for total recovery
WARNING: this mask is available on units with total recovery.
2.9 DK MONITOR ONLY ON UNITS WITH 2 SEPARATE GAS
SIDE CIRCUITS
:
10.0 °C
6.2 °C
15.0 °C
Comm.Out.Evap.:
Evap.Out 1:
Evap.Out 2:
DK Unit
— Evaporator common output: indicates the current temperature value read by
the probe placed on the common output connection from the two evaporators.
— Evaporator water output 1: indicates the current temperature value for water
leaving the evaporator 1.
— Evaporator water output 2: indicates the current temperature value for water
leaving the evaporator 2.
3 INPUT/OUTPUT MENU
3.1 FAN MONITOR
This window summarises the state of the fans and the utilised setpoints:
100%
0.0bar
0.0bar
18.9bar
100%
0.0bar
0.0bar
32.5bar
Fan
Speed
Set:
Di:
1:Preventil.
Fan
Speed
Set:
Di:
2:
Preventil.
Fan
Speed
Set:
Di:
1:Preventil.
Fan
Speed
Set:
Di:
2:
Preventil.
— Speed: this value indicates the current speed (as a percentage) at which the
concerned fans are operating (common, circuit 1 or circuit 2);
— Set: Fan setpoint: this value indicates the current ventilation setpoint;
— Di: Ventilation setpoint dierential: this value indicates the current dierential
applied to the ventilation setpoint;
The state of the fans (displayed on the row at the bottom of the window), can be:
— OFF: fans o;
— PREVENTILATION: fans ON before the compressors;
— high pressure: control based on high pressure;
— POSTVENTILATION: ventilation after compressor OFF;
— ANTI-FREEZE: ventilation phase to prevent the accumulation of snow or the
formation of ice;
— DEFROSTING: defrosting phase in progress;
— Equalisation: control based on low temperature;
— MAXIMUM SPEED: fans at maximum speed;
— SILENCED: speed reduced to reduce noise
3.2 OUTSIDE TEMPERATURE MONITOR
This window indicates the value of the outside temperature detected by the unit:
15.0°C
15.0°C
15.0°C
15.0°C
15.0°C
Outdoor temp.
Yester.
Today

11
3.3 DEFROSTING MONITOR
This window contains the information concerning the state of defrosting on the
unit:
0s
0.06.4bar DP:
14.0°C
0s
0.06.2bar DP:
14.0°C
Liquid Temp.:
LP aver:
Times:
High ext. temperature
Disabled
Defrost C1
Liquid Temp.:
LP aver:
Times:
High ext. temperature
Disabled
Defrost C2
The state of defrosting is divided between two rows, the rst can have the following
states:
— Disabled: defrosting is disabled;
— Bypass: bypass phase after the compressor start;
— Decreasing calculation: phase calculating the decrease of pressure;
— Wait for cycle inversion: pause before inversion of the cycle valve;
— Defrosting start: defrosting during the start phase;
— Defrosting in progress: defrosting phase;
— End of defrosting: conclusion of defrosting;
— First defrost: shows the rst defrost phase after a power loss.
The second row can have the following states:
— High outside temperature: the air temperature is above the defrosting ena-
bling threshold;
— Circuit o: all the compressors of the circuit are o; defrost is disabled;
— LP above the limit threshold: the low pressure is above the limit threshold to
trigger defrosting;
— Min times between defrosting procedures: the defrosting is disabled to re-
spect the minimum time between defrosting procedures;
— Start CP: compressor just started, wait for defrosting bypass time;
— New LP reference: a new low pressure value has been taken as reference for
the calculation of decreasing pressure;
— Start for LP limit: start of the defrosting due to exceeding the low pressure
limit threshold;
— Start for Delta P: start of defrost to overcome the decreasing value of low pres-
sure;
— Liquid Temp OK: the temperature of the liquid exceeded the threshold for de-
termining the end of defrosting;
— Min defrosting times: defrosting continues until exceeding the minimum de-
frosting time even if the output conditions were already reached;
— Awaiting other circuit: occurs if the fans are common to both circuits and the
rst circuit to nish defrost awaits the second circuit to nish;
— Bypass rst start: the rst defrost after a power loss can only occur after the
compressor has run for the determined time;
— Liquid temp. Low: liquid temperature below the level that determines the end
of defrost;
— Start for TGP: defrosting was activated due to exceeding the temperature
threshold of the discharge gas;
— Forced: defrosting was forced by the user;
The following data is available in the lower part of the window:
— Times: displays the seconds related to the defrosting times;
— Low average pressure: shows the average low pressure in the last minute;
— Delta pressure: shows the accumulated delta pressure to determine activation
of defrost;
— T.Liquid: temperature of the liquid to determine the defrosting output.
3.4 MULTIFUNCTION INPUT MONITOR
This window contains the information concerning the state of the multifunction
input:
(ID4 PCOE):
pCO5 U3= 57.0%
Power limitation
ACTIVE
Input Multifunction
Plant
Digital Input ID4 PCOE: this value indicates the state of the digital input connected
to multifunction input (U3) enabling, whose states can be:
— OPEN: multifunction input (U3) NOT ENABLED;
— CLOSED: multifunction input (U3) ENABLED;
The functions currently selected for the multifunction input U3 are displayed at the
bottom of the window; to set that function, refer to the dedicated paragraph in the
installer menu;
3.5 I/O MONITOR
The status of the available inputs and outputs will be shown on the display, divid-
ed into successive pages;the following paragraphs will contain the tables with the
various analogue and digital inputs and outputs (in the order in which they will be
listed on the display of the unit) available on the software;
The order in which the masks will be available will be as follows:
— Analogue inputs;
— Digital inputs;
— Digital outputs;
— Analogue outputs;
— Inputs and outputs (uPC medium expansion for Chiller with Freecooling/Gly-
colFree or Recovery);
— Inputs and outputs (pCOE Expansion for NRL,NRB(Large 50Hz),NLC,NYB,N-
RV,BRB Heat Pumps and Two-circuit);
— Inputs and outputs (pCOE expansion for DK versions);
— Inputs and Outputs (pCOE expansion for Motor condensing);
— Inputs and outputs (pCOE expansion for NYB/NRV);
— Inputs and Outputs (pCOE Expansion for “NRB0282-0754”, NRB Large 60Hz
Two-circuit);
— Inputs and outputs (pCOE expansion for“Variable Primary Flow”).
NB: the displays may or may not be present (or change) depending on the model
of the unit;

12
4 INPUT AND OUTPUT
4.1 ANALOGUE INPUTS
Analogue inputs Code Range Description
NRB 6 CP / NRBH 6CP
U1
BP2 Low pressure transducer circuit 2
33% Condensing units up to 6 CP Step switch on contact
U2
SUW Evaporator water outlet probe
16% Condensing units up to 6 CP Step switch on contact
U3 Multifunction Multi-function input
U4
SL1 NRK Circuit 1 Liquid temperature probe
SGP1 NRL Discharge temperature sensor circuit 1
NLC/H Single Circuit
U5 (4-20mA) AP1 High pressure transducer circuit 1
U6 (4-20mA) BP1 Low pressure transducer circuit 1
U7
SL2 NRK Circuit 2 Liquid temperature probe
SGP2 NRL Discharge temperature sensor circuit 2
SAC NLC/H Single Circuit
SGA NRB Single Circuit Intake temperature probe
U8 (4-20mA) o (NTC)
AP2 High pressure circuit 2 transducer
SL1 NLC/H Single Circuit

4.2 DIGITAL INPUTS
Digital inputs Code Range Description
ID1 FL Flow switch
ID2 AP1 Circuit 1 high pressure pressure switch / discharge gas thermostat
ID3 TV1 Fan circuit breaker circuit 1
ID4 RCS Phase monitor
ID5 TC1 Overload compressor 1 circuit 1
ID6 TC1A Overload compressor 2 circuit 1
ID7 TC2 Overload compressor 1 circuit 2
ID8 AP2 Circuit 2 high pressure pressure switch /discharge gas thermostat
ID9 TC2A Overload compressor 2 circuit 2
ID10 TMP1 Overload pump 1
The possible status for each digital input or output can be:
OPEN: load not active;
CLOSED: load active;
4.3 DIGITAL OUTPUTS
Digital outputs Code Range Description
NO1 MPO1 Pump 1 evaporator
NO2 CP1 Compressor 1 Circuit 1
NO3 CP1A Compressor 2 Circuit 1
NO4 VIC2 With heat pump Circuit 2 reverse cycle valve
NO5 VSL1 Liquid solenoid valve circuit 1
NO6 VIC1 With heat pump Circuit 1 reverse cycle valve
NO7 MV1 Fans group 1
NO8 AE Alarm summary
NO9
CP2 Compressor 1 Circuit 2
R1 NLCH single-circuit with integral
resistance or replacement boiler
NO10
CP2A Compressor 2 Circuit 2
R2 NLCH single-circuit with integral
resistance
NO11 VSB1 With heat pump Thermostatic bypass solenoid valve circuit 1
NO12 VSL2 Solenoid valve circuit 2
NO13
VSB2 With heat pump Thermostatic bypass solenoid valve circuit 2
V2V NYB cooling only Hydronic circuit closure valve
The possible status for each digital input or output can be:
OPEN: load not active;
CLOSED: load active;

13
4.4 ANALOGUE OUTPUTS
Analogue outputs Code Range Description
Y1 DCP1 Modulating fans unit 1
Y2 DCP2 Modulating fans unit 2
Y3 DCP3 Modulating fan group 1+2 or 3 (with 3
ventilation groups)
Y4 DCP4 NRB Circuit1 modulating fan unit that switches
o at low outdoor temperatures
Y5 DCP5 NRB Circuit2 modulating fan unit that switches
o at low outdoor temperatures
Y6 Tray heater Single Circuit

4.5 INPUTS AND OUTPUTS UPC MEDIUM EXPANSION FOR CHILLER WITH FREECOOLING/GLYCOLFREE OR RECOVERY
Analogue inputs Code Range Description
B1 (NTC)
B2 (NTC)
B3 (NTC)
B4 (NTC)
B5 (NTC)
B6 (NTC) SIR With total recovery Total recovery inlet water temperature
SFC With Freecooling  Free cooling inlet probe
B7 (NTC) SUR With total recovery Total recovery outlet water temperature
SFC2 With Freecooling  Free cooling outlet probe (Glycol Free)
B8 (NTC) SUR2 With total recovery Total recovery outlet water temperature
SRU With Freecooling  Intermediate evaporator probe
B9 (NTC; NTC HT;) SUW2 DK Evaporator 2 water outlet probe
B10 (NTC,4-20mA)
B11 (NTC, 0-5V) SUC DK Common evaporator outlet probe
B12 (NTC, 0-5V)
Digital inputs
ID1 TPR With total recovery External heat recovery pump (new management proposed)
FLC With Free-cooling glycol free Flow switch side heater
ID2 FLR With total recovery Recovery ow switch
MTP With Free-cooling glycol free Glycol Side Pump thermomagnetic
ID3
ID4
ID5
ID6
ID7
ID8
ID9
ID10
Digital outputs
NO1 VA1_40 With Freecooling Coil disconnecting valve circuit 1
NO2 RS2 With total recovery Heater recovery exchanger
RS2 With Freecooling GlicoleFree Glycol Side Heater
NO3 VB1_40 With Freecooling Coil spillage valve circuit 1
NO4 VR1 With total recovery Circuit 1 spillage from Recovery
VB1_60 With Freecooling Coil spillage valve circuit 1
NO5 VB1 With total recovery Circuit 1 spillage from Condenser
VB2_40 With Freecooling Coil spillage valve circuit 2
NO6 VR2 With total recovery Circuit 2 spillage from Recovery
VB2_60 With Freecooling Coil spillage valve circuit 2
NO7
VB2 With total recovery Circuit 2 spillage from Condenser
VSFR3V With Freecooling Free cooling 3-way valve
MPG Free glycol Free glycol pump
NO8 VRT1 With total recovery Total recovery 3-way valve circuit 1
VA1_60 With Freecooling Coil disconnecting valve circuit 1
NO9 VRT2 With total recovery Total recovery 3-way valve circuit 2
VA2_40 With Freecooling Coil disconnecting valve circuit 2
NO10 VA2_60 With Freecooling Coil disconnecting valve circuit 2
NO11 VSL1A With total recovery Oil spillage valve from recovery circuit 1
NO12 VSL2A With total recovery Oil spillage valve from recovery circuit 2
Analogue outputs
Y1
Y2
Y3
Y4

Note: Modbus address=11
The possible status for each digital input or output can be:
OPEN: load not active;
CLOSED: load active;

14
4.6 INPUTS AND OUTPUTS PCOE EXPANSION FOR NRL, NRBLARGE 50HZ,NLC,NYB,NRV,BRB HEAT PUMPS AND TWO
CIRCUIT
Analogue inputs Code Range Description
B1 (NTC) SL1 Circuit 1 Liquid temperature probe
B2 (NTC) SL2 Circuit 2 Liquid temperature probe
B3 (NTC) SAC With supplementary heater Storage tank probe
B4 (NTC)
Digital inputs
ID1
ID2
ID3
ID4
Digital outputs
NO1 RI1 With supplementary heater Output1 Integral resistance
With replacement boiler Replacement boiler consent output
NO2 RI2/RI3 With supplementary heater Output2 Integral resistance
NO3 Tray heater Command also on output 0_10V Y6
NO4 V3V Domestic hot water 3-way valve (required via Modbus)
Analogue outputs
Y1
Y2
Y3
Y4

Note: Modbus address pCOE=2, DIP2=ON.
The possible status for each digital input or output can be:
OPEN: load not active;
CLOSED: load active;
4.7 INPUTS AND OUTPUTS PCOE EXPANSION FOR DK VERSIONS
Analogue inputs Code Range Description
B1 (NTC) SUW2 DK Second evaporator water outlet temperature probe
B2 (NTC) SUC DK Evaporator common outlet temperature probe
B3 (NTC)
B4 (NTC)
Digital inputs
ID1
ID2
ID3
ID4
Digital outputs
NO1
NO2
NO3
NO4
Analogue outputs
Y1
Y2
Y3
Y4

Note: Modbus address pCOE=3, DIP1=ON, DIP2=ON.
The possible status for each digital input or output can be:
OPEN: load not active;
CLOSED: load active;

15
4.8 INPUTS AND OUTPUTS PCOE EXPANSION FOR MOTOR CONDENSING
Analogue inputs Percentage Range Description
B1 (NTC)
B2 (NTC)
B3 (NTC)
B4 (NTC)
Digital inputs
ID1 100% Condensing units up to 4 CP Compressor or step switch on contact
100% Condensing units up to 6 CP
ID2 75% Condensing units up to 4 CP Compressor or step switch on contact
83% Condensing units up to 6 CP
ID3 50% Condensing units up to 4 CP Compressor or step switch on contact
66% Condensing units up to 6 CP
ID4 25% Condensing units up to 4 CP Compressor or step switch on contact
50% Condensing units up to 6 CP
Digital outputs
NO1
NO2
NO3
NO4
Analogue outputs
Y1
Y2
Y3
Y4

Note: Modbus address pCOE=4, DIP3=ON.
The possible status for each digital input or output can be:
OPEN: load not active;
CLOSED: load active;
4.9 INPUTS AND OUTPUTS PCOE EXPANSION FOR NYB/NRV
Analogue inputs Code Range Description
B1 (NTC) SFC Free cooling inlet probe
B2 (NTC)
B3 (NTC) Dierential transmitter For PN21 systems Replaces the ow meter
B4 (NTC)
Digital inputs
ID1
ID2
ID3
ID4
Digital outputs
NO1 V2V Evaporator Valve
NO2 V2VA
Free cooling valve
Output ON= freecooling enabled -
Output O= freecooling disabled
NO3
NO4
Analogue outputs
Y1
Y2
Y3
Y4

Note: Modbus address pCOE=5, DIP1=ON, DIP3=ON.
The possible status for each digital input or output can be:
OPEN: load not active;
CLOSED: load active;

16
4.10 INPUTS AND OUTPUTS PCOE EXPANSION FOR“NRB02820754”, NRB LARGE 60HZ TWOCIRCUIT
Analogue inputs Code Range Description
B1 (NTC) SL1 Circuit 1 Liquid temperature probe
SLB1
NRB Single Circuit Circuit 1 liquid temperature probe coil 1
B2 (NTC) SL2 Circuit 2 Liquid temperature probe
SLB2
NRBH Single Circuit Circuit 1 liquid temperature probe coil 2
B3 (NTC) SIW evaporator water inlet probe
B4 (NTC) SAE External air sensor
Digital inputs
ID1
TMP2 Overload pump 2
ID2 C/H Remote season contact (closed= summer mode)
ID3 ON/OFF Remote ON/OFF contact (closed=ON)
ID4 Enable Multifunction Multifunction input enabling
Digital outputs
NO1 NRB 0282-0754 Y Thermostatic expansion valve exchange C1
NO2 NRB 0282-0754 Y Thermostatic expansion valve exchange C2
NO3 RE Heater exchanger
NO4 MPO2 Pump 2 evaporator
Analogue outputs
Y1
Y2
Y3
Y4

Note: Modbus address pCOE=6, DIP2=ON, DIP4=ON.
The possible status for each digital input or output can be:
OPEN: load not active;
CLOSED: load active;
4.11 INPUTS AND OUTPUTS PCOE EXPANSION FOR“VARIABLE PRIMARY FLOW”
Analogue inputs Description Note
B1 (NTC) Dierential pressure Dierential transducer
B2 (NTC)
B3 (NTC)
B4 (NTC)
Digital inputs
ID1
ID2
ID3
ID4
Digital outputs
NO1
NO2
NO3
NO4
Analogue outputs
Y1 Bypass VPF Valve control Bypass opening
Y2
Y3
Y4

Note: Modbus address pCOE=7, DIP1=ON, DIP2=ON, DIP4=ON.
The possible status for each digital input or output can be:
OPEN: load not active;
CLOSED: load active;

17
5 ON/OFF MENU
5.1 GENERAL ON/OFF
This window makes it possible to view the general state of the system as well as to
turn the unit on or o:
On/O Unit
NO
General enable:
O General
Plant
Display of the general system state:
— Flow switch open: the chiller's ow switch is open;
— Enabled: the system regulates via the main probe based on the system setpoint;
— O due to alarm: system o due to serious alarm;
— General o: system turned o by general enabling (see the paragraph de-
scribed below "General enabling”);
— O by BMS: system turned o by the supervision system;
— O by clock: system turned o by time bands;
— O by dig. input: system turned o by digital input (ID3 PCOE);
— O by display: system turned o by terminal, control system screen;
— Antifreeze: unit forcibly switched on to prevent freezing;
— O by master: system turned o by master in master/slave conguration;
— Out of operating limits: system out of machine operating limits;
— Replacement boiler: replacement boiler active;
It is possible to change the unit state in the last row. If NO is selected, the entire
system will be put in stand-by mode, if YES is selected the machine is turned on.
6 SYSTEM MENU
6.1 SELECTING THE SYSTEM OPERATING MODE
This mask is used to display the current unit state, to turn the unit on or o and to
select the operating mode:
HEATING
Mode Selection:
YES
Switch On:
O General
Plant
Enable: allows to select the mode with which to turn the unit on or o; the available
options are:
— OFF: the system does not produce hot/chilled water;
— YES: the system regulates via the main probe based on the system setpoint;
— YES WITH SET2: the system regulates via the main probe based on setpoint 2;
— BY CLOCK: the system regulates only when time bands are active;
Mode selection: allows to select the operating mode used to operate the unit; the
available options are:
— COOLING: the system is in cooling mode;
— HEATING: the system is in heating mode;
— FROM OUTSIDE TEMP.: summer or winter mode is selected based on the out-
side temperature;
— FROM DIG. INPUT: if the digital contact closes, the hot mode is selected;
— BY SUPERVIS.: the BMS system controls remotely;
— BY CALENDAR: hot mode is selected by the calendar;
6.2 SETTING THE VALUES FOR THE PRIMARY SETS
This mask is used to set the values to assign to the primary working setpoints:
7.0°C
45.0°C
Setpoint 1
Plant
The primary working setpoints are:
— : setpoint 1 for cooling mode;
— : setpoint 1 for heating mode;

18
6.3 SETTING THE VALUES FOR THE SECONDARY
SETPOINTS
This mask is used to set the values to assign to the secondary working setpoints:
12.0°C
40.0°C
Setpoint 2
Plant
The secondary working setpoints are:
— : setpoint 2 for cooling mode;
— : setpoint 2 for heating mode;
Enable the system with the secondary setpoint as an option (ON CON SET 2) in the
rst screen of the System menu.
6.4 SETTING THE TIME BANDS A AND B
This mask is used to set the times and action to assign to the time bands (a) and (b):
a
b
08:00
16:00 22:00
12:00 ON
SEL
ON
Plant
MONDAYDay
Timezone
It is possible to assign up to four time bands (a, b, c, d) for each day of the week,
during which a specic action can be selected:
— ON: system on with setpoint 1 (nominal);
— SET2: system on with setpoint 2;
— OFF: system o;
NB: the system keeps the system o outside the time bands.
WARNING: All the screens for time-clock programming are only visible if
activated in the main screen of the System menu (Enabling = TIME-CLOCK)
6.5 SET THE TIME BANDS C AND D
This mask is used to set the times and action to assign to the time bands (c) and (d):
c
d
08:00
16:00 22:00
12:00 ON
SEL
ON
Plant
MONDAYDay
Timezone
It is possible to assign up to four time bands (a, b, c, d) for each day of the week,
during which a specic action can be selected:
— ON: system on with setpoint 1 (nominal);
— SET2: system on with setpoint 2;
— OFF: system o;
NB: the system keeps the system o outside the time bands.
WARNING: All the screens for time-clock programming are only visible if
activated in the main screen of the System menu (Enabling = TIME-CLOCK)
6.6 COPY/PASTE TIME BANDS
This mask is used to copy and paste the time bands set for a day of the week to
another (or to all other days):
---
Plant
NOCopy to
MONDAYDay
Timezone
Each program has 8 days and each day has four time periods at which the switch-on
and switch-o time, set point 2 or switch-on/switch-o can be set.
Outside these 4 time periods the program will switch the system o:
00:00
ON (set 1) ON (set 1)Set 2 Set 2
a-On a-O
24:00
b-On b-O c-On c-O d-On d-O
WARNING: All the screens for time-clock programming are only visible if
activated in the main screen of the System menu (Enabling = TIME-CLOCK)

19
6.7 SETTING THE SEASON CHANGE FROM THE CALENDAR
HEATING
This mask is used to set the start and end date for heating mode:
0/---
0/---
Cooling/Heating
Finish Heating
Start Heating
Calendar
Select Cool/Heat with
WARNING: This screen for automatic control based on calender is only vis-
ible if activated in the main screen of the System menu (Selection mode =
BY CALENDAR)
6.8 SETTING THE SEASON CHANGE FROM THE CALENDAR
COOLING
This mask is used to set the start and end date for cooling mode:
27.0°C
13.0°C
Cooling/Heating
Set ON heating
Set ON cooling
Outdoor temperature
Select Cool/Heat with
WARNING: This screen for automatic control based on external air tem-
perature is only visible if activated in the main screen of the System menu
(Selection mode = BY EXT. TEMP.)
7 RECOVERY MENU
7.1 ENABLING RECOVERY
This mask is used to display the actual status of the total recovery, and to enable or
disable the total recovery:
YES
Switch On:
O General
The mask displays the total recovery status;the available options are:
— ow switch open (water is not circulating in the hydraulic circuit of the recovery
system and therefore it is disabled);
— enabled (water is circulating in the hydraulic circuit of the recovery system and
therefore it is enabled);
— general o (whole unit in stand-by);
— o from display (general disabling of the unit from the pGD1 button);
Enable: allows to enable or disable the total recovery;
WARNING: this mask is available on units with total recovery.
7.2 SET THE RECOVERY SET VALUE
This mask allows to view and set the value to be assigned to the recovery work set
(default value 45° C, setting range 30~50° C):
Setpoint 1: 45.0°C
WARNING: this mask is available on units with total recovery.

20
8 CLOCK MENU
8.1 SETTING SYSTEM DATE AND TIME
This mask is used to set the system date and time:
16 MARZ 2020
16:29
Clock
Hour:
Time:
MONDAYDay:
8.2 SETTING THE AUTOMATIC SUMMER/WINTER TIME
CHANGE
This mask is used to set the automatic change between summer and winter time, it
is also possible to dene the day the change is made:
02:00
03:00
Clock
YES
alleOctober
in
alleMarch
in
SUNDAYEnd: LAST
SUNDAY
LAST
Start:
Hour solar/legal:
Automatic change
8.3 SETTING THE PUBLIC HOLIDAYS ON THE CALENDAR
This mask is used to set the days (up to 5 intervals) to mark as "holidays" (therefore
to activate the relative time programming previously specied for the holiday time
band), or set the o mode for the system:
25/DIC. 26/DIC. ---
15/LUGL 15/LUGL ---
0/--- 0/--- ---
0/--- 0/--- ---
0/--- 0/--- ---
Calendar
ActionFinishStart
This mask displays:
Start date: shows the date of the start of the holiday. The calender can control
a maximum of 5 days dened as hlidays, during which time specic actions are
carried out.
End date: shows the date of the end of the holiday. The calender can control a max-
imum of 5 days dened as holidays, during which time specic actions are carried
out.
Action to associate with holiday: shows which action the unit will take during the
holiday, which may be:
— OFF: unit will be o during the days selected;
— FEST.: unit will be controlled as specied in the time-clock programme called
HOLIDAY (for further information refer to the function of the time-clock);
— --- : if no action is specied the unit will be controlled by the manual settings.