PROGRAMMABLE CONTROLLER FOR
CHILLER – HEAT PUMPS
SINGLE-CIRCUIT
2 COMPRESSORS
APPLICATION MANUAL
CODE 144HPR0N0E00
C-PRO NANO HPR0 APPLICATION MANUAL
Important
Read these instructions carefully before installation and use and follow all recommendations regarding installation and
for the electric connection; keep these instructions for future reference.
The instrument must be disposed of according to local Standards regarding the collection of electric and
electronic appliances.
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C-PRO NANO HPR0 APPLICATION MANUAL
Summary
1 Application and organisation of I/O.....................................................................................................................................................................4
1.1 I/O.............................................................................................................................................................................................................. 5
1.2 Connection lay out for C-PRO NANO INTRABUS .................................................................................................................................. 6
1.3 Network components and accessories........................................................................................................................................................ 8
2 Functioning.......................................................................................................................................................................................................... 9
3 User Interface..................................................................................................................................................................................................... 14
3.1 Display and keyboard...............................................................................................................................................................................14
3.2 List of pages.............................................................................................................................................................................................15
3.3 Password.................................................................................................................................................................................................. 15
3.4 Main OFF page........................................................................................................................................................................................ 15
3.5 Main ON page.......................................................................................................................................................................................... 16
3.6 Main Menu............................................................................................................................................................................................... 16
3.7 StAt menu................................................................................................................................................................................................ 16
3.8 User Menu................................................................................................................................................................................................ 16
3.9 Maintenance technician - Installer menu.................................................................................................................................................. 17
3.10 Manufacturer Menu............................................................................................................................................................................17
3.11 Project and Firmware Versions........................................................................................................................................................... 18
4 List of Parameters.............................................................................................................................................................................................. 19
5 Controls and regulations .................................................................................................................................................................................... 21
5.1 Machine state........................................................................................................................................................................................... 21
5.1.1 OFF state due to alarm ..................................................................................................................................................................21
5.2 Checking the functioning mode................................................................................................................................................................ 21
5.3 Regulation and management of the compressors......................................................................................................................................22
5.4 Compressors status................................................................................................................................................................................... 23
5.5 Protection times........................................................................................................................................................................................23
5.6 Safety Inputs ............................................................................................................................................................................................ 23
5.7 Management of the geothermic circulation pumps and heating/cooling................................................................................................... 24
5.8 Pump status.............................................................................................................................................................................................. 24
5.9 Pump protection times..............................................................................................................................................................................24
5.10 Flow switches management................................................................................................................................................................ 25
5.11 Management of high pressure alarm from pressure switch ................................................................................................................. 25
5.12 Management of low pressure alarm from pressure switch .................................................................................................................. 25
6 Programming .....................................................................................................................................................................................................26
Programming key............................................................................................................................................................................................... 26
7 Alarms ............................................................................................................................................................................................................... 27
Alarms Table ...........................................................................................................................................................................................................27
Alarm relay.............................................................................................................................................................................................................. 27
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C-PRO NANO HPR0 APPLICATION MANUAL
1 Application and organisation of I/O
The layouts attached describe the application (controlled unit and system). They indicate the
presence of parts and components and not their precise position or other construction aspects of the
units described.
The I/O tables state the necessities and the organisation of the controller inputs and outputs for the
type of unit and system to be controlled.
HPR0: application layout
Heat pump unit – reversible (chiller) – (only) geothermic – 2 compressors – just one
heating/cooling circuit – NO area control – INTRAbus.
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C-PRO NANO HPR0 APPLICATION MANUAL
1.1 I/O
For HPR0 a C-PRO NANO (INTRAbus) must be used with the following features .
Total analogical inputs: 4. Total digital inputs: 5 (*). Total digital outputs: 6.
Total analogical outputs: 1 + 2 optionals (not present on this application).
(*) Note: A total number of 7 digital inputs are used in this application for this purpose n°2 analogue inputs will be used
as digital inputs.
I/O Description
Analogue Inputs
A/I 1 Heating/cooling outlet / condit. (NTC)
A/I 2
A/I 3 Summer - Winter (ON-OFF potential-free contact)
A/I 4 External thermostat (ON-OFF potential-free contact)
Serial ports (RS 485 and
INTRABUS)
TTL (RS 485) TTL with ext interf. EVIF becomes RS485 Modbus RTU
INTRAbus towards c-pro EVCO instruments
Digital Inputs
D/I 1 High pressure switch (ON-OFF potential-free contact)
D/I 2 Low pressure switch (ON-OFF potential-free contact)
D/I 3 Geothermic circuit flow switch (ON-OFF potential-free contact)
D/I 4 Outlet circuit flow meter (ON-OFF potential-free contact)
D/I 5 Room thermostat (ON-OFF potential-free contact)
Analogue Outputs
A/O 1 PWM output not used
A/O 2 Optional (4-20 mA/0-10 V) : not present
A/O 3 Optional (4-20 mA/0-10 V) : not present
Digital Outputs
D/O 1 compressor 1
D/O 2 compressor 2
D/O 3 CYCLE INVERSION 4-WAY VALVE
D/O 4 Geothermic circuit pump
D/O 5 Heating/air conditioning outlet circuit pump
D/O 6 General alarm
N.B.: All contacts arriving at the controller inputs must be potential free contacts, without voltage.
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C-PRO NANO HPR0 APPLICATION MANUAL
1.2 Connection lay out for C-PRO NANO INTRABUS
Below find the connection lay out of the C-PRO NANO controller with tables relative to the
meaning of the inputs and outputs.
C-PRO NANO connections
Connector 1: Connection for the relay outputs
Conn. Code Description
C1-1 DO4 Relay n.4 normally open contact
C1-2 DO3 Relay n.3 normally open contact
C1-3 COMMON 1 Common relays n.1,2,3,4
C1-4 DO5 Relay n.5 normally open contact
C1-5 DO2 Relay n.2 normally open contact
C1-6 DO1 Relay n.1 normally open contact
C1-7 COMMON 1 Common relays n.1,2,3,4
C1-8 COMMON 1 Common relays n.1,2,3,4
C1-9 COMMON DO5 Common relay n.5
C1-10 Not used
C1-11 DO6 Relay n.6 normally open contact
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C-PRO NANO HPR0 APPLICATION MANUAL
Connector 2: Connection for the upload/download parameters and/or output pen for RS485 module and/or
controller flash download module
Connector 3: Connector for the analogue output
Conn. Code Description (Version V+I)
C3-1 AO2 0-10Vdc
C3-2 GND Common analogue output
C3-3 AO3 4-20mA
Description (Version I+I)
C3-1 AO2 4-20mA
C3-2 GND Common analogue output
C3-3 AO3 4-20mA
Description (Version V+V)
C3-1 AO2 0-10Vdc
C3-2 GND Common analogue output
C3-3 AO3 0-10Vdc
Connector 4: Connector for low voltage signals
Conn. Code Description
C4-1 12Vac (Power) Instrument power supply (12Vac/dc)
C4-2 Not connected Not connected
C4-3 GND Common analogue and digital inputs
C4-4 GND Common analogue and digital inputs
C4-5 AI4 Analogue input n.4 (for NTC probes or 0/4-20 mA
transducers)
C4-6 AI3 Analogue input n.3 (for NTC probes or 0/4-20 mA
transducers)
C4-7 AI2 Analogue input n.2 (for NTC probes)
C4-8 AI1 Analogue input n.1 (for NTC probes)
C4-9 12Vac (Power) Instrument power supply (12Vac/dc)
C4-10 12Vdc Current transducers and phase cut module power supply
(max. 50 mA, not protected against short circuit)
C4-11 AO1 Jog output for phase cut module
C4-12 DI5 Digital input n.5
C4-13 DI4 Digital input n.4
C4-14 DI3 Digital input n.3
C4-15 DI2 Digital input n.2
C4-16 DI1 Digital input n.1
Connector 5: Connector for the remote keyboard and expansion of I/O
Conn. Code Description
C5-1 12Vdc Remote keyboard power supply (12Vdc max 50mA, not
protected against short circuits)
(Note: any expansion must be powered locally)
C5-2 GND Common
C5-3 DATA Serial live
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C-PRO NANO HPR0 APPLICATION MANUAL
1.3 Network components and accessories
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C-PRO NANO HPR0 APPLICATION MANUAL
2 Functioning
Translation of terms used and notes
Digital inputs
Inter été/hiver = summer/winter switch (cooling/heating)
Pressostat HP = HIGH pressure switch
Pressostat BP = LOW pressure switch
Controleur de débit d’eau circuit chauffage = OUTLET circuit flow switch
Controleur de débit d’eau circuit chauffage = GEOTHERMIC circuit flow switch
Thermostat d’ambiance = ROOM thermostat (inserts compressor 1)
Thermostat d’ambiance = EXTERNAL thermostat (inserts compressor 2)
Analogue Inputs
Sonde de dèpart d’eau = OUTLET temperature probe
Digital outputs
Vanne 4 voies = 4-way valve (cycle inversion)
Compressor 1
Compressor 2
Circolateur chauffage = OUTLET circuit pump
Circolateur capteur = GEO circuit pump
Set
Consigne 1 = OUTLET temperature set in functioning mode: “heating”
Consigne 2 = OUTLET temperature set in functioning mode: “cooling”
Selecting the functioning mode
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Heating mode 1
C-PRO NANO HPR0 APPLICATION MANUAL
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Heating mode 2
C-PRO NANO HPR0 APPLICATION MANUAL
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Cooling mode 1
C-PRO NANO HPR0 APPLICATION MANUAL
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Cooling mode 2
C-PRO NANO HPR0 APPLICATION MANUAL
N.B.: Set and timing can be set on the controller
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C-PRO NANO HPR0 APPLICATION MANUAL
3 User Interface
3.1 Display and keyboard
The following interface is envisioned for the application:
⋅ A 4 display interface with 7 Built-In segments with icons
⋅ With 4 keys with navigation/editing the pages and they differ for display
The following icons are also used:
- Summer icon: identifies the cooling functioning mode (summer - chiller): if the heat
regulation requests, it is on in fixed mode, otherwise it is off.
- Winter icon: identifies the heating functioning mode (winter - heat pump): if the heat
regulation requests, it is on in fixed mode, otherwise it is off.
- Fans icon: not used
- Pumps icon: identifies the state of the pumps (geothermic and flow). If on, the pumps result
as running, otherwise it is off. If flashing, it signals that the flow switch has intervened in at
least one of the two circuits (no water - liquid alarm).
- Maintenance icon: not used
- Alarm icon: identifies the presence or not of alarms. Alarms are present if it is on, otherwise
it remains off. When flashing, it signals the presence of a new alarm not yet viewed. The
icon flashes if there are alarms when the machine is off.
- Icons 1,2: identify the state of the individual compressors. If on, the compressor is
functioning, otherwise it is off. The flashing indicates that the compressor has been stopped
for a pressure switch intervention (HIGH or LOW pressure alarm).
- External ventilated heat exchanger anti-freeze resistance icon: not used
- Stand-by icon: not used
- Defrosting icon: not used
- °C/°F icon: used only in °C
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C-PRO NANO HPR0 APPLICATION MANUAL
3.2 List of pages
This paragraph presents the main pages and menus found in the application. As shown previously,
the main menu is divided into 3 levels: user, maintenance - installer and manufacturer.
The menus have the following structure:
⋅ Main Menu
⋅ User menu (Level 1)
⋅ Maintenance technician - installer menu (Level 2)
o Functioning branch maintenance technician menu
o Calibration branch maintenance technician menu
o Compressors branch maintenance technician menu
o Pumps branch maintenance technician menu
o Safety conditions branch maintenance technician menu
o Parameters map branch maintenance technician menu
o I/O branch maintenance technicians menu
⋅ Manufacturer menu (Level 4)
o Configurations branch manufacturer menu
3.3 Password
A level is associated to every menu that conditions access to the various menus.
A password is associated to every level, which allows access to the various functions present in that
determined menu. Once the correct password has been entered the protected function can be
accessed. Two effects are obtained by entering a password correctly:
⋅ release of the correlated level
⋅ release of the sub-levels
Every level password can be modified from the same level or higher levels. For example, all
passwords of lower levels can be modified from the manufacturer level, using the appropriate page.
The range of values that can be set for the password is -999/9999.
After 4 minutes that no key is pressed, the password expires and must be set again.
3.4 Main OFF page
The main OFF page changes depending on the reason for which the unit is off. There are three
possibilities:
1. Unit OFF: unit switched-off using key
2. Unit OFF from Alarm: unit switched-on using key but switched-off due to unit block
alarms.
3. Unit OFF from Change-over: unit switched-on using key but switched-off due to summer-
winter change-over (this state remains until the pumps are switched-off)
Note: The MANUFACTURER menu can only be accessed if the unit is in one of these states.
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C-PRO NANO HPR0 APPLICATION MANUAL
3.5 Main ON page
The main page displays the temperature of the outlet water and the relative icons on at that moment.
By pressing the DOWN key for about 2 seconds from this page, enter MENU.
From MENU, by pressing the ESC key, go back to the main page.
3.6 Main Menu
The main menu does not have a level and is the access point for all other system menus.
USEr (USER Menu)
MAin (MAINTENANCE-INSTALLER menu)
CoSt (MANUFACTURER menu)
StAt (MACHINE STATUS menu)
From this page, select which menu to enter using the UP and DOWN keys and press the ENTER
key to confirm.
By pressing ESC from this menu, go back to the initial page.
3.7 StAt menu
If StAt is selected from the main menu, some main system states are displayed:
Unit: indicates the state in which the machine is operating (OFF, ChIL, pdC)
CMP1: state of compressor 1 (OFF, tOn, On, tOFF)
CMP2: state of compressor 2 (OFF, tOn, On, tOFF)
PMP1: state of the outlet circuit pump (OFF, tOn, On, tOFF)
PMP2: state of the geothermic circuit pump (OFF, tOn, On, tOFF)
fLw1: state of the outlet circuit flow switch (OFF, tOn, On, ALAr)
fLw2: state of the geothermic circuit flow switch (OFF, tOn, On, tAL, ALAr)
By pressing ENTER on the label, see the value of the relative state, by pressing ESC go back to the
main menu mask. This menu is not protected by a password.
3.8 User Menu
The user level password or higher must be entered in order to display/modify the parameters present
in this branch.
SPC1 (summer - cooling setpoint)
SPH1 (winter - heating setpoint)
SSC1 (summer setpoint offset)
SSH1 (winter setpoint offset)
PSd1 (USER password)
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3.9 Maintenance technician - Installer menu
The maintenance technician - installer level password or higher must be entered in order to
display/modify the parameters present in this branch.
Func (FUNCTIONING Menu)
CAL (CALIBRATION Menu)
CoMP (COMPRESSORS Menu)
PuMP (PUMPS Menu)
SEcu (SAFETY Menu)
MAP (PARAMETERS MAPS Menu)
I-O (I/O STATE menu)
PSd2 (MAINTENANCE TECHNICIAN- INSTALLER Password)
In this menu it is possible to view the state of the various devices, inputs and outputs used by the
application.
In the FUNCTIONING menu it is allowed to set the data of the last maintenance operation
performed
In the CALIBRATION menu it is possible to set a correction to be made to the measurement of the
outlet probe in order to compensate any errors owing to wiring and positioning of the probe.
In the COMPRESSORS menu it is possible to set the parameters relative to functioning and the
protections of the compressors (timing, signalling delays, etc).
In the PUMPS menu it is possible to set the parameters relative to functioning and the protections of
the pumps (flow switches, timing, signalling delays, etc).
In the SAFETY DEVICES menu, find all parameters that concern the alarms and the management of
the safety conditions for the devices:
⋅ enablings
⋅ signal delays
⋅ type of reset...
The PARAMETERS MAPS menu can only be reached if the machine is OFF. In this menu it is
possible to save or reload the parameters from a programming key and, if necessary, to reset the
factory parameters. In this menu, after every operation, it is necessary to switch the instrument off
and back on again to make the modification operational.
3.10 Manufacturer Menu
The Manufacturer level password must be entered in order to display/modify the parameters present
in this branch. Moreover, this level can only be accessed with machine OFF (with just instrument
powered).
ConF (SYSTEM menu)
PSd4 (MANUFACTURER Password)
This menu contains all machine configuration parameters.
It also allows to configure the logic of the inputs and outputs.
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C-PRO NANO HPR0 APPLICATION MANUAL
3.11 Project and Firmware Versions
Press the UP+DOWN keys at the same time for about 2 seconds and successively press ENTER on
the InFo label.
The information regarding the versions of the project and the controller firmware are displayed in
sequence, precisely:
Project Number <-> Project Version <-> Project Revision <->
Firmware Number <-> Firmware Version <-> Firmware Revision
Use the UP and DOWN keys to scroll the information. To return to the application pages, press the
ESC key.
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C-PRO NANO HPR0 APPLICATION MANUAL
4 List of Parameters
The same parameters organisation used for c-pro CHILL can be maintained.
For the parameters and functions of the c-pro HPR0 application, see the following table.
As an example, the codes used with CHIL have been maintained (that will appear on the LED
display), but which will be “re-organised” regarding numbering depending on this new application.
Code
PSd1 Modify the password to User level 0 -999 9999 UT
SPC1
SSC1 Sets the summer outlet setpoint offset value 0.0 -20.0 20.0 °C UT
SPH1 Sets the winter outlet setpoint value (heating) 44.0 PC23 PC24 °C UT
SSH1 Sets the winter outlet setpoint offset value 0.0 -20.0 20.0 °C UT
PSd2
PM91
PM92
PM93
PM81
PC04
PC05
PC06
PC07 Minimum time for switch-on of compressor 1 60 0 999 Sec IS-C
PC08
PC09
PC10
PC21 Outlet summer setpoint minimum value 5.0 -15.0 SPC1 °C IS-R
PC22 Outlet summer setpoint maximum value 20.0 SPC1 23.0 °C IS-R
PC23 Outlet winter setpoint minimum value 30.0 23.0 SPH1 °C IS-R
PC24 Maximum value of the winter setpoint 44.0 SPH1 70.0 °C IS-R
PP04
PP05 Minimum time that must pass between switch- 60 1 999 Sec IS-P
Sets the summer outlet setpoint value
(cooling)
Sets the Maintenance technician - Installer
level password
Sets the last date maintenance was performed
on the system (year)
Sets the last date maintenance was performed
on the system (month)
Sets the last date maintenance was performed
on the system (day)
Calibration of the heating water outlet
temperature probe
Minimum time for which the compressor must
remain on even if switch-off has been
requested
Minimum time for which the compressor must
remain off even if switch-on has been
requested
Minimum time that must pass between two
switch-ons of the same compressor.
Minimum time for switch-on of compressor 2
(winter mode)
Minimum time for switch-on of compressor 2
(summer mode)
Compressor 1 block delay due to high
temperature
Minimum time that must pass between the
switch-on of the pumps and switch-on of the
first compressor
Parameter description Default Min Max U.M. Menu Notes
USER PARAMETERS
OUTLET SET
8.5 PC21 PC22 °C UT
MAINTENANCE TECHNICIAN - INSTALLER PARAMETERS
0 -999 9999 IS-V
2007 2007 2060 MA-F
1 1 12 MA-F
1 1 31 MA-F
CALIBRATION
0.0 -20.0 20.0 °C MA-CA
COMPRESSORS
20 0 999 Sec IS-C
120 0 999 Sec IS-C
360 0 999 Sec IS-C
10 0 20 Min IS-C
60 0 999 Sec IS-C
240 0 999 Sec IS-C
OUTLET SET LIMITS
PUMPS and FLOW SWITCHES
60 1 999 Sec IS-P
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C-PRO NANO HPR0 APPLICATION MANUAL
off of the unit and pumps switch-off
PP06 Pumps switch-on delay 9 1 20 Min IS-P
PP07 pumps switch-off delay (winter mode) 60 1 999 Sec IS-P
PP08 pumps switch-off delay (summer mode) 9 1 20 Min IS-P
ALARMS
PA01
PA02 Flow switch alarm delay 10 1 999 Sec IS-P
PA03
PA04 Probe error delay 10 0 240 Sec IS-P
PH15 Reset the factory parameters default No (0) No (0) Yes (1) IS-V
PSd4 Manufacturer level password 0 -999 9999 CO-Pa
PH05
PH06
PH16
PH17
PH18
PH19
PH20
PH21
PH43
PH44
PH52
Flow switches alarm delay from pumps
switch-on
Low pressure alarm delay after start-up of the
first compressor
DEFAULT PARAMETERS
MANUFACTURER PARAMETERS
I/O CONFIGURATION
Enables switch-on/off of the machine by
pressing the ESC/Stand-By key
Enables functioning mode change from
switch
Sets the logic of the relay used for the
inversion 4-way valve
0: Normally open NO
1: Normally closed NC
Sets the logic of the digital inputs used for
management of the alarms:
0: Normally open NO
1: Normally closed NC
Sets the logic of the relay used for the alarms
0: Normally open NO
1: Normally closed NC
Sets the logic of the digital input used for
summer/winter change-over:
0: Normally open NO
1: Normally closed NC
Sets the logic of the digital input used for
flow control (flow switch):
0: Normally open NO
1: Normally closed NC
Sets the logic of the digital input used for
thermostats control:
0: Normally open NO
1: Normally closed NC
Sets the analogue input A/I 3 :
0: Probe disabled
1: ON OFF potential free contact (SUM-
WIN)
Sets the type of universal analogue input A/I4
0: Probe disabled
1: ON OFF potential free contact
(Ext. Aria ext)
Sets the display of the Evco icon
0: No
1: Yes
30 1 999 Sec IS-S
240 1 999 Sec IS-P
Yes (1) No (0) Yes (1) IS-V
Yes (1) No (0) Yes (1) IS-V
NO NO (0) NC (1) IS-V
NC NO (0) NC (1) IS-V
NO NO (0) NC (1) IS-V
NO NO (0) NC (1) IS-V
NO NO (0) NC (1) IS-V
NO NO (0) NC (1) IS-V
1 0 1 IS-V
1 0 1 IS-V
Yes (1) No (0) Yes (1) IS-V
Wait for the
value 0 to be
read again on
completion of
reset
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C-PRO NANO HPR0 APPLICATION MANUAL
HARDWARE CONFIGURATION
Those eventually necessary (to be defined in
the design phase)
5 Controls and regulations
5.1 Machine state
The unit is switched-on/off using the relative On/Off key :
Switch-on - press the relative key for 2 seconds: if all of the other conditions enabled are
present, the machine goes to “ON”.
Switch-off - press the relative key for 2 seconds: the machine goes to “OFF” mode.
The unit can be switched-off due to change-over or summer/winter mode change taking place with
unit on. The unit will switch back on when the pumps have switched-off.
The machine On/Off key is the ESC key.
5.1.1 OFF state due to alarm
When the machine is on, a further state exists OFF due to alarm, which switches the nit and all
devices off until the alarm condition has been reset. If switch-off using key is requested in this state,
the power plant goes to the relative OFF state. The alarm causing this state is the broken outlet
probe alarm.
The machine works normally again when the alarm has been reset.
5.2 Checking the functioning mode
The c-pro HPR0 - reversible version - was developed as a unit able to work as a heat pump or
chiller, supplying water for heating or air conditioning according to system request
The unit will function as Chiller or Heat Pump, passing from one situation to the other
automatically depending on the “Summer/Winter” control (A/I 3)
The operational mode can assume the following values:
“SEAS” state Operational mode Description
Off=0=COLd Chiller Summer functioning mode
On=1=HEAt Heat Pump Winter functioning mode
The DO03 cycle inversion valve is activated during winter functioning mode (Heat Pump).
Warning - The operational mode can also be varied with the machine on: in this case, the machine
switches off respecting all timings. It therefore changes-over and switches back on automatically.
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C-PRO NANO HPR0 APPLICATION MANUAL
5.3 Regulation and management of the compressors
The controller can manage up to a maximum of 2 compressors. Digital outputs for switch-on/off
and protection inputs (pressure switches) are associated with every compressor. Switch-on/off is
defined depending on the set/outlet temperature, some timing and request of the room thermostat
and the indoor thermostat.
The compressor switch-on control takes place on the basis of the outlet temperature AI1.
The following figure shows the behaviour of the regulation in the case of summer functioning
(chiller). The regulation requests compressor switch-on on the basis of the outlet temperature value.
In this regulation, the band is shifted completely over the setpoint.
Compressor ON
Pump ON
Outlet temperature
However, in winter functioning mode (heat pump), the band is shifted completely below the setpoint:
Compressor ON
Pump ON
Outlet temperature
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C-PRO NANO HPR0 APPLICATION MANUAL
5.4 Compressors status
The compressor has one functioning state associated, which can be seen via the relative LED or in
the states mask from the main menu. The compressor assumes the following states:
- On: “On” appears on the state mask
- Switch-on stand-by: the compressor is in stand-by due to the switch-on protection times.
“tOn” appears on the state mask
- Off: “OFF” appears on the state mask
- Switch-off stand-by: the compressor is in stand-by due to the switch-off protection times.
“tOFF” appears on the state mask
5.5 Protection times
Below find a list of all times relative to the management of the compressors
These times are used to protect the mechanical means from the various peaks to which they are
subjected.
The settings are unique for the two compressors in this application.
Compressors switch-on minimum time. Once activated, the compressor will remain on for this
period of time before it can be switched off. (parameter PC04)
Compressors switch-off minimum time. Minimum time that must pass from last switch-off before
the compressor can be switched back on again. (parameter PC05)
Minimum time between switch-ons of the same compressor. Establishes the minimum time that
must pass between two switch-ons of the same compressor . (parameter PC06)
Compressor 1 switch-on minimum time. Minimum time for which the switch-on condition of the
first compressor to be switched-on must remain. (parameter PC07)
Compressor 2 switch-on minimum time (HP). Minimum time for which the switch-on condition of
the second compressor to be switched-on must remain (in winter mode). (parameter PC08)
Compressor 2 switch-on minimum time (chiller). Minimum time for which the switch-on condition
of the second compressor to be switched-on must remain (in summer mode). (parameter PC09)
Compressor 1 switch-off delay after high pressure alarm. Compressor block delay after HP alarm.
(parameter PC10)
Minimum time between pump switch-on and switch-on of the first compressor. Once both pumps
have been activated, the compressors will wait for a delay that can be set by parameter to be started.
(parameter PP04)
5.6 Safety Inputs
The program DOES NOT envision the management of a “compressor thermal switch” safety input
for every compressor. It only envisions HIGH and LOW pressure compressors protection, via
mechanical ON-OFF pressure switches.
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C-PRO NANO HPR0 APPLICATION MANUAL
5.7 Management of the geothermic circulation pumps and
heating/cooling
The application can manage the unit and system pumps. A safety digital input and a digital output
for switch-on/off can be associated at every use.
5.8 Pump status
The pumps are each controlled by a dedicated digital output (see I/O table).
Functioning takes place on call of the ON-OFF thermostats (EXT and/or INT) and/or outlet
temperature. The pump is activated as a consequence of the room thermostat request, with switchon/off delay times (that can be set) indicated on the functioning (flow) lay outs.
A functioning state is associated to the pumps in the states mask from the main menu. For example,
the pumps assume the following states:
- On: “On” appears on the state mask
- Switch-on stand-by: they are in stand-by for the switch-on protection times. “tOn” appears
on the state mask
- Off: “OFF” appears on the state mask
- Alarm: following the intervention of the flow switch, “ALAr” appears on the state mask.
5.9 Pump protection times
These times are used to ensure the correct sequence and priority in switch-on or switch-off. The
controller manages a unique safety device (flow switch) for each pump.
The relative insertion or alarm delay times can be enabled and set by the specific parameters. The
settings are unique for the two pumps in this application.
The compressor switches off in the same way as the thermostat switch-off request, while the pump
remains on for a time period that ca be set.
In the event of breakdown (Flow switch Alarm) of one of the two pumps, the compressors and
pumps are switched-off
Minimum time between unit switch-off and pumps switch-off. Once the unit is switched-off, the
pumps will remain on for this period of time before switching-off. (parameter PP05)
Pumps activation delay. Once the unit is switched-on and has the consents necessary for pumps
switch-on (see diagram), the pumps will switch-on after this period of time (parameter PP06)
Pumps switch-off delay. If the consent is lost for maintaining the ON mode of the pumps (see
diagram), the pumps will switch-off after this period of time (winter mode) (parameter PP07)
Pumps switch-off delay. If the consent is lost for maintaining the ON mode of the pumps (see
diagram), the pumps will switch-off after this period of time (summer mode) (parameter PP08)
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C-PRO NANO HPR0 APPLICATION MANUAL
5.10 Flow switches management
The 2 unit flow switches are managed separately: heating/air conditioning circuit, geothermic
circuit, but the setting of the “Flow switches alarm delay” is unique for the two flow switches.
On expiry of the Flow switches alarm delay time, if the contact signals no flow, the alarm is given
immediately, stopping the pump and preventing compressor switch-on.
During normal functioning, the flow sensor is monitored continuously: if the contact signals no
flow for a period of time exceeding the delay, the alarm is given immediately, switching off any
compressors that are functioning.
The flow switch alarm has manual reset using the front key of the controller.
5.11 Management of high pressure alarm from pressure switch
Via the digital input D/I 1, connected to the mechanical HIGH pressure switch, it is possible to
intervene when a maximum pressure in the cooling circuit is exceeded. With the high pressure
alarm , compressor 2 is stopped and, with the persistence of the alarm, after a certain period of time
(that can be set by parameter PC10) compressor 1 is also stopped (stop unit). The alarm has manual
reset using the front key of the controller.
5.12 Management of low pressure alarm from pressure switch
Via the digital input D/I 2, connected to the mechanical pressure switch, it is possible to intervene
when a minimum pressure occurs in the cooling circuit intake. The low pressure alarm causes the
immediate shutdown of the cooling circuit, stopping any compressors running and preventing others
from switching-on.
On start-up of the first compressor, the alarm is delayed by a certain time (that can be set by “LOW
pressure delay” PA03), so as not to allow the compressors to pressurise the circuit. The alarm has
manual reset using the front key of the controller.
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C-PRO NANO HPR0 APPLICATION MANUAL
6 Programming
The instrument can be programmed from front key or using the programming key.
Programming key
It is possible to save the value of all system parameters in the programming key and allow copying
into one or more compatible instruments. The saving or reset operation can only be performed with
machine OFF, by connecting the key to the programming container.
Note: The information relative to the product and relative version are saved in the key, in a way to allow the transfer of
parameter maps only between compatible instruments.
To save a particular parameters map in the key:
- Enter the InSt->MAP menu and select “Stor” using the UP and DOWN
keys.
- Press the SET (ENTER) key: the transfer of the parameters into the key
is highlighted by the flashing of the relative LED.
- Wait for flashing to end: if the LED id green, the operation has
concluded correctly, otherwise the LED is red.
To coy a parameters map from the key to the instrument:
- Enter the InSt->MAP menu and select “rESt” using the UP and DOWN
keys.
- Press the SET (ENTER) key: the transfer of the parameters from the
key into the instrument is highlighted by the flashing of the relative
LED.
- Wait for flashing to end: if the LED id green, the operation has
concluded correctly, otherwise the LED is red.
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C-PRO NANO HPR0 APPLICATION MANUAL
7 Alarms
All alarms are envisioned with manual reset from controller front key.
In the event of an alarm:
⋅ The alarm icon starts to flash
By pressing the ENTER key from the “Alar” menu, the code of the first active alarm is displayed.
Once the conditions that caused the alarm in the unit have been eliminated, the alarm can be reset
manually. To perform this operation:
⋅ be positioned on the page of the alarm to be reset
⋅ hold the ENTER key down for about 2 seconds.
At this point, if there are no other alarms, the page indicating “none” will be shown, the alarm icon
will switch-off ad the machine will start to function normally again or the code relative to the next
active alarm will be shown.
The consequences on unit functioning, which derive from an alarm that has occurred, remain valid
until the user does not perform reset (deleting the message) the alarm manually.
Alarms Table
For the parameters and functions of the c-pro HPR0 application, see the following table.
Code
Alarm description
Type Consequence
Notes
AL01 Heating/Cooling circuit flow switch M
AL02 Geothermic circuit flow switch M
AL03 High pressure switch M
AL04 Low pressure switch M
ES01
Notes: M = Manual alarm reset
Alarm relay
The controller manages an alarm relay The relay is activated in the event of an alarm. Its
intervention only stops with manual reset of the alarm from front key of the controller.
Via an appropriate parameter, it is possible to establish the logic (NO or NC) of the alarm relay
output contact.
Outlet temp. probe broken or
disconnected
M
Compressors OFF
Pump off.
Compressors OFF
Pump off.
All compressors
progressive OFF
All compressors
OFF
Signal
Unit off
Delay can be set
Delay can be set
Start delay and
normal
conditions that
can be set
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C-PRO NANO HPR0 APPLICATION MANUAL
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C-PRO NANO HPR0 APPLICATION MANUAL
Application manual C-PRO NANO HPR0
Version 1.0 of September 2010
Code CODE 144HPR0N0E00.
This publication is exclusive property of Evco, which prohibits reproduction and distribution,, unless expressly authorised by Evco itself. Evco does
not assume any liability regarding the features, technical data and possible errors in this document or deriving from use of the same. Evco cannot be
held responsible for any damage caused by the failure to comply with the warnings. Evco reserves the right to make any modifications at any time
without jeopardising the essential functionality and safety features, without forewarning.
Page 29
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