lennoxemeia.com
@DNOVA
pCO1
Manuel
d’installation,
mise en service
et maintenance
Microprocesseur
INNOVA-pCO1-IOM-0907-F
INNOV@-pCO1-IOM-0907-E 1
Index
1 GENERAL DESCRIPTION OF THE APPLICATION ...................................................3
1.1 Program main functions............................................................................................................... 3
1.2 LCD user interface......................................................................................................................3
1.3 LAN network connections ............................................................................................................ 3
2 REGULATION LOGIC .................................................................................................4
2.1 Temperature control.................................................................................................................... 4
2.1.1 Close control units with direct expansion coil........................................................................... 4
2.1.2 Other temperature functions.................................................................................................... 5
2.1.3 Close control units with two water coils.................................................................................... 5
2.1.4 Close control units with single water coil..................................................................................6
2.2 Humidity control..........................................................................................................................6
2.2.1 Close control units with direct expansion coil...........................................................................7
2.2.2 Other humidity functions.......................................................................................................... 7
2.2.3 Close control units with water coils.......................................................................................... 8
2.3 Recovery coil..............................................................................................................................8
2.3.1 Recovery without cooling devices............................................................................................9
2.3.2 Recovery with cooling devices on close contr. units with direct expan. coil...............................9
2.3.3 Recovery with cooling devices on close control units with water coils.................................... 10
2.4 Outlet limit................................................................................................................................. 11
2.5 Condenser fans......................................................................................................................... 12
2.5.1 Single or separate coils......................................................................................................... 12
2.5.2 Condensing pressure probes ................................................................................................ 12
2.5.3 Prevent function.................................................................................................................... 13
2.5.4 Speed-up function................................................................................................................. 13
2.5.5 Pressure – temperature conversion....................................................................................... 13
2.6 Temperature set point compensation......................................................................................... 13
2.7 Compressors............................................................................................................................. 14
2.7.1 Rotation................................................................................................................................ 14
2.7.2 Timing................................................................................................................................... 14
2.7.3 Compressor alarms............................................................................................................... 14
2.8 Heaters ..................................................................................................................................... 15
2.8.1 Heater alarms .......................................................................................................................15
2.9 Modulating valves ..................................................................................................................... 15
2.9.1 Three-position valves............................................................................................................15
2.9.2 0-10Volt VALVES..................................................................................................................16
2.10 Outlet fan..................................................................................................................................16
3 THE USER INTERFACE ...........................................................................................17
3.1 Keyboard description................................................................................................................. 17
3.1.1 Switch ON/OFF of the unit..................................................................................................... 17
3.1.2 Screen loop........................................................................................................................... 17
3.2 Remote user interface............................................................................................................... 18
3.2.1 Without local display.............................................................................................................18
3.2.2 With local display..................................................................................................................18
4 BOARD CONFIGURATION AND CONNECTION .....................................................19
4.1 Address configuration................................................................................................................ 19
2 INNOV@-pCO1-IOM-0907-E
4.1.1 Address configuration of the microprocessor (pCO1)..........................................................................19
4.1.2 Address configuration of the PGD ......................................................................................... 19
4.1.3 Address configuration of the E2V electronic expansion valve’s driver (EVD).......................... 19
4.2 Boards connection....................................................................................................................20
4.2.1 Stand alone unit.................................................................................................................... 20
4.2.2 Units connected in LAN (max. 8 units)................................................................................... 20
4.2.3 LAN status............................................................................................................................ 21
4.3 Software update........................................................................................................................ 21
4.3.1 Program download from hardware key.................................................................................. 21
4.3.2 Program download from computer.........................................................................................22
4.3.3 Restore the default parameters.............................................................................................22
4.3.4 Language selection...............................................................................................................23
5 ALARMS.................................................................................................................... 23
5.1 Table of alarms ......................................................................................................................... 23
5.2 Alarm data logging .................................................................................................................... 24
5.3 Main log ....................................................................................................................................24
6 SCREENS.................................................................................................................26
6.1 List of the screens..................................................................................................................... 26
7 LIST OF PARAMETERS AND DEFAULT VALUES...................................................28
8 ARCHITECTURE OF THE CONTROL SYSTEM ......................................................34
8.1 Microprocessor layout ............................................................................................................... 34
8.2 Configuration list ....................................................................................................................... 35
8.3 Accessories...............................................................................................................................35
8.3.1 Electronic expansion valve.................................................................................................... 35
8.3.2 Accessories ..........................................................................................................................36
8.3.3 Built-in humidifier..................................................................................................................37
9 SUPERVISION..........................................................................................................37
9.1 Supervisor and bms .................................................................................................................. 37
9.2 Gsm protocol............................................................................................................................. 39
9.3 Examples of installation............................................................................................................. 40
9.4 Shared external display............................................................................................................. 40
9.5 Automatic start and stand-by units............................................................................................. 41
9.5.1 Critical situations...................................................................................................................41
9.5.2 Forcing..................................................................................................................................41
9.5.3 Fixed-hour rotation................................................................................................................ 42
9.5.4 Fixed-day rotation .................................................................................................................42
9.5.5 Rotation based on working hours.......................................................................................... 42
9.6 Master control........................................................................................................................... 42
9.7 Technical data........................................................................................................................... 43
INNOV@-pCO1-IOM-0907-E 3
1 GENERAL DESCRIPTION OF THE APPLIC ATION
This program manages “DX” direct expansion or “CW” water coil air-conditioning units and the main features
of the application program are described below.
1.1 Program main functions
The program main functions are:
• control of temperature and humidity inside civil or technological environments
• management of 1 to 2 hermetic compressors
• management of 1 to 2 heaters (binary logic available)
• 0-10Volt and three-position modulating heating valves
• 0-10Volt and three-position modulating cooling valves
• built-in humidifier with immersed electrodes
• on-off or modulated condensing fans, pressure-controlled
• outlet temperature control
• alarms management, alarm data logging, devices timing, warnings
• complete management of devices timing
• connection with local and BMS supervisory networks (Carel, Modbus, LonWorks, …)
1.2 LCD user interface
The LCD user interface displays the following data:
• measurement of connected probes and calibration, if required
• unit start and stop
• alarms detection
• programming of configuration and operative parameters with access protected by password
• controlled devices working hours and time bands with access protected by password
• programming of clock and time bands with access protected by password
• language selection among the available options (English, Italian, German, French)
1.3 LAN network connections
The connection with LAN network allows the program to manage the following functions as well:
• automatic time or event rotation among up to 8 units
• control of temperature and humidity of max. 8 units, taking the probes of unit no. 1 as a reference
• use of only one LCD display fo r controlling up to 8 units
4 INNOV@-pCO1-IOM-0907-E
2 REGULATION L OGIC
2.1 Temperature control
The heating and cooling devices are managed based on the temperature value measured by the ambient (or
room temperature) probe. The measured temperature is compared to the set temperature (set point); the
devices are enabled based on the difference between the two values. The proportional band identifies the
air-conditioning unit working range and can take different values in heating and cooling mode. The dead
zone identifies the devices non-action zone round the set point. The following diagrams show the action of
the heating and cooling devices. The percentage values indicate the modulating valves opening range. The
warm and cold valves start and end opening parameters correspond to 0% and 100% respectively (default
values) and are different for the two valves; if need be, the values may be modified to delay opening start
and bring complete opening forward.
2.1.1 Close control units with direct expansion coil
Temperature set
HEATING COOLING
100% 0% 0% 100%
19.5 22.5 23.0 23.5 26.5
3°C 0.5°C 0.5°C 3°C Ambient
temp. (°C)
Warm proportional band Dead z. Dead z. Cold proportional band
1 HEATER 1 COMPRESSOR
19.5 22.5 23.0 23.5 26.5
Ambient
temp. (°C)
COMP.2/
HEATER 1 HEATER 2 COMP.1 C1 capacity control
19.5 21.5 22.5 23.0 23.5 25.0 26.5
Ambie nt
temp. (°C)
BINARY MANAGEMENT
HEATER 3 HEATER 2 HEAT ER 1 COMP.1 C1 c.c. COMP.2 C2 c.c.
19.5 20.5 21.5 22.5 23.0 23.5 24.2 25.0 25.7 26.5 Ambient
temp. (°C)
0-10 Volt WARM WATER VALVE
100%
0%
19.5 22.5 23.0 Ambient
temp. (°C)
Opening start point (0%)
Opening end point (100%)
100%
0%
19.5 22.5 23.0 Ambient
temp. (°C)
Three-position valve running time
INNOV@-pCO1-IOM-0907-E 5
2.1.2 Other temperature functions
The high and low temperature alarms cause alarm screen signalling and have modifiable delay time.
The dehumidification stop differential establishes the minimum temperature below which dehumidification is
interrupted. Dehumidification can start again if temperature returns above the value established by the
humidification start offset; differential and offset are modifiable.
ON OFF Temperature set
Dehumidification stop
HEAT. COOL.
13.0 18.0 20.0 22.0 23.0 26.0 33.0 Ambient
3°C 3°C temp. (°C)
Warm band Cold band
4°C
Dehumid. start offset
5°C
Dehumid. stop different.
10°C 10°C
Low temperature alarm High temperature alarm
2.1.3 Close control units with two water coils
These close control units are equipped with a warm water coil and a cold water coil. In addition, heating can
also be executed by heaters. The following diagram s hows the cooling devices action, whereas the heating
devices action is dealt with in the paragraph describing the direct expansion units.
Temperature set
HEATING COOLING
100% 0% 0% 100%
19.5 22.5 23.0 23.5 26.5
3°C 0.5°C 0.5°C 3°C Ambient
temp. (°C)
Warm proportional band Dead z. Dead z. Cold proportional band
0-10 Volt WARM WATER VALVE
100%
0%
23.0 23.5 26.5 Ambient
temp. (°C)
Opening start point (0%)
Opening end point (100%)
100%
THREE-POSITION COLD WATER
0%
23.0 23.5 26.5 Am bient
temp. (°C)
Three-position valve running time
6 INNOV@-pCO1-IOM-0907-E
2.1.4 Close control units with single water coil
In these close control units, the coil provides for both heating and coo ling, depending on the type o f water
circulating inside it. In practice, the unit works as it was equipped with two different coils. The co il o peration
depends from a Summer / Winter digital contact that “reports” whether the circulating water is warm or cold
to the board; if the “type of water” circulating inside the coil complies with the ambient request, the valve is
modulated to regulate temperature.
In addition, heating can also be executed by heaters or a warm coil. For any information about coil and
heaters operation, refer to the previous paragraphs.
2.2 Humidity control
The humidification and dehumidification devices are managed based on the humidity value measured by the
ambient (or room temperature) probe. The m easured humidity is compared to the set humidity (set point);
the devices are enabled based on the difference between the two values. The proportional band identifies
the ai r-conditioning unit working ra nge and can take different values in humidification and dehumidification
mode. The 0.2% fixed dead zone identifies the devices non-action zone round the set point.
Dehumidification enables the available cooling devices and a contact for an external dehumidifier or for
reducing the outlet fan speed.
Dehumidification can be executed as follows:
On-Off contact for an external dehumidifier or for reducing the outlet fan speed
compressors enabling (active capacity controls included, if any)
100% enabling of the 0-10Volt or three-position modulating cooling valve
The dehumidification On-Off free contact is always managed, whereas the cooling devices depend on unit
configuration and User selection. The 0-10Volt modulating output of the dehumidification outlet fan is
automatically reduced by 50% (modifiable); with On-Off fan, use the digital contact for reducing speed.
The following diagrams show the humidification and dehumidification devices action. The percentage values
indicate the modulating valves opening range.
INNOV@-pCO1-IOM-0907-E 7
2.2.1 Close control units with direct expansion coil
Humidity set
HUMIDIFICATION DEHUMIDIFICATION
100% 0% 100%
48.0 50.0 52.0 Ambie nt
2.0% 2.0% humidity (%)
Humidification proportional band Dehumidification proportional band
1 COMPRESSOR
ON-OFF CONTACT + Capacity control, if any
48.0 50.0 52.0 Ambie nt
humidity (%)
0-10Volt MODULAT. OUTPUT
100%
COMP. 1 + COMP. 2 +
0% c.c., if any c.c., if any
48.0 50.0 51.0 52.0
Ambie nt
humidity (%)
100% INTEGRATED HUMIDIFIER
30%
48.0 49.8 50.0 Ambie nt
humidity (%)
2.2.2 Other humidity functions
Humidity set
100% 100%
48.0 50.0 52.0 Ambie nt
2.0% 2.0% humidity (%)
Humidification proportional band Dehumidification proportional band
100%
0-10V COLD WATER VALVE
0%
50.0 52.0 Ambient
humidity (%)
100%
THREE-P. COLD WATER VALVE
0%
50.0 52.0
Ambient
humidity (%)
The high and low humidity alarms cause alarm screen signalling and have modifiable delay time.
8 INNOV@-pCO1-IOM-0907-E
2.2.3 Close control units with water coils
In these close control units, the cold water coils provide for dehumidification. For any information about their
operation, refer to the previous paragraph. The following diagrams show the dehumidification devices action.
The percentage values indicate the modulating valves opening range. Please note that the dehumidification
cold water coils are enabled at 100%, not in modulating mode, in case of both threeposition and 0-10Volt
valves.
Humidity set
40.0 48.0 50.0 52.0 60.0 Ambient
2.0% 2.0% humidity (%)
Humid. band Dehumid. band
10.0% 10.0%
Low humidity alarm High humidity alarm
2.3 Recovery coil
Recovery is an optional function: an additional cold coil using water coming from an external source (i.e.,
evaporation tower) is enabled if the te mperature of water running inside it is quite low. This allows saving on
the system management costs. The coil is enabled by On-Off contact or 0-10Volt modulating signal.
The following diagram shows the recovery coil enabling conditions: environment cooling request and
recovery water temperature lower than recovery set – recovery differential.
Temperature set
COOLING REQUEST
0%
23.0 23.5 26.5 Ambient
0.5°C 3°C temp.(°C)
Dead z. Cold prop. band
Recovery set
RECOVERY ENABLED
10.0 12.0 Recovery
2°C temp.(°C)
Recovery differential
OFF ON OFF
Recovery
coil state
INNOV@-pCO1-IOM-0907-E 9
2.3.1 Recovery without cooling devices
As shown in the previous diagram, the recovery coil only is enabled, whereas the conventional cooling
devices are not switched on; as it can be noted in the following diagram, the recovery coil takes up the entire
cold proportional band.
Temperature set
HEATING COOLING
100% 0% 0% 100%
19.5 22.5 23.0 23.5 26.5
3°C 0.5°C 0.5°C 3°C Ambient
temp. (°C)
Warm proportional band Dead z. Dead z. Cold proportional band
RECOVERY ON-OFF CONTACT
23.0 23.5 26.5 Ambient
temp. (°C)
0-10V RECOVERY VALVE 100%
0%
23.0 23.5 26.5 Ambient
temp. (°C)
2.3.2 Recovery with cooling devices on close contr. units with direct expan.
coil
With recovery coil enabled, the conventional cooling devices a re s witched on only if ambient temperature
increases above a certain value; adding the effects of recovery coil and devices together, temperature
decreases, but before reaching the set point, the cooling devices are switched off again. In this case, the
cooling devices favour Recovery but do not substitute for it. The following diagram shows how the cooling
devices steps are offset compared to normal position to ensure energy saving.
10 INNOV@-pCO1-IOM-0907-E
Te mpe rature set
HEAT. COOLING
0% 0% 100%
22.5 23.0 23.5 26.5
0.5°C 0.5°C 3°C Ambient
Dead z. Dead z. Cold proportional band temp. (°C)
RECOVERY COIL ON
On-Off 1 COMPRESSOR
OFF 0-10Volt
23.0 23.5 24.6 24.9 26.5
Ambie nt
temp. (°C)
RECOVERY COIL ON
On-Off COMPR. 1 COMPR. 2/
OFF 0-10Volt C1 can control
23.0 23.5 24.6 24.9 25.6 26.5
Ambie nt
temp. (°C)
RECOVERY COIL ON
On-Off C.1 C.1 C.2 C.2
OFF 0-10Volt c.c. c.c.
23.0 23.5 24.6 24.9 25.1 25.6 26.1 26.5
Ambie nt
temp. (°C)
2.3.3 Recovery with cooling devices on close control units with water coils
The following diagram shows how the cold coil steps are offset compared to normal position to ensure
energy saving.
Tempe rature set
HEAT. COOLING
0% 0% 100%
22.5 23.0 23.5 26.5
0.5°C 0.5°C 3°C A mbient
Dead z. Dead z. Cold proportional band temp. (°C)
RECOVERY COIL ON 0-10V MOD. WARM VALVE
On-Off
OFF 0-10Volt
23.0 23.5 24.6 24.9 26.5
Ambie nt
temp. (°C)
RECOVERY COIL ON THREE-P- WARM VALVE
On-Off
OFF 0-10Volt
23.0 23.5 24.6 24.9 26.5
Ambie nt
temp. (°C)
INNOV@-pCO1-IOM-0907-E 11
2.4 Outlet limit
This function prevents too cold air from circulating in the environment, thus safeguarding health of any
exposed person. A temperature probe must be positioned on the air-conditioning unit outlet and parameters
“Outlet set point” and “Outlet differential” shall be set. Such parameters identify a limiting zone, as shown in
the following diagram:
Outlet set
100% VARIABLE LIMITATION
TOTAL
LIMITATION 0%
10.0 15.0
5.0°C Ambient
Outlet differential temp. (°C)
Temperature set
1 COMPRESSOR
23.0 23.5 26.5
Ambie nt
temp. (°C)
COMPRESSOR 1 COMPRESSOR 2/
C1 can control
23.0 23.5 25.0 26.5
Ambie nt
temp. (°C)
COMP.1 C.1 c.c. COMP.2 C.1 c.c.
23.0 23.5 24.2 25.0 25.7 26.5
Ambie nt
temp. (°C)
0-10V COLD WATER VALVE
100%
0%
23.0 23.5 26.5
Ambient
temp. (°C)
THREE-POINT COLD WATER VALVE
100%
0%
23.0 23.5 26.5
Ambie nt
temp. (°C)
As shown in the diagram, if outlet temperature ranges between outlet set point and outlet differential, the
cooling devices are limited only partially; the more temperature decreases the more limitation increases.
As regards dehumidification limitation, the modulation zone is by-passed since dehumidification always
needs the cooling devices maximum capacity. In practice, the devices are switched off only if outlet
temperature is lower than differential; the devices are then switched o n a gain if outlet temperature rea ches
the outlet set point, as shown in the following diagram:
Outlet set
ON OUTLET LIMITATION
TOTAL
LIMITATION OFF LIMITATION OFF
10.0 15.0
5.0°C Outlet
Outlet differential temp. (°C)
12 INNOV@-pCO1-IOM-0907-E
2.5 Condenser fans
Condensing pressure control is available on DX type units, in which fans are managed based on condensing
coil pressure and compressors state. Fans are enabled by 0-10V m odulating or digital outputs. Control is
based on the condensation set point and differential, as shown in the following diagram:
Condensation set
CONDENSATION HP PREVENT HP
14.0 16.0 18.0 20.0 23.5 24.5
2.0 bar 2.0 bar 1.0 bar Condensation
Condensation differential Prevent differential HP differential pressure (bar)
ON
OFF
Compressor
state
ON
OFF
Condensing
fans state
The following diagram shows fans operation with modulating outputs:
100%
13.0 0% 14.0 16.0
2.0 bar Condensation
Opening start point (100%) pressure (bar)
Opening end point (0%)
The maximum and minimum speeds of 0-10V outputs can be set; in case the set minimum speed is higher
than 0V, the fan is operated at minimum speed 1.0 bar below the condensation set point before switching off,
as indicated in the diagram above.
2.5.1 Single or separate coils
In ca s e of single coil, only one output (on-off or modulating) is enabled. In case of units with at least one
condensing probe and enabled on-off outputs, two on-off outputs may be enabled in sequence, dividing the
differential by two.
In case of separated coils, two different outputs (on-off or modulating) are enabled, one per circuit.
2.5.2 Condensing pressure probes
Foreword: besides the values read by the probes, fans enabling always considers the compressors state.
In case of single probe and separated coils, fans enabling is based on the probe value for both circuits.
In case of two probes and single coil, fans enabling is based on the highest probes value.
In case of two probes and separated coils, fans enabling is based on the probe value of the relevant circuit.
INNOV@-pCO1-IOM-0907-E 13
In ca se no probe is present, fans are enabled simultaneously with the compressors; in case of single coil,
fans are enabled when at least o ne compressor is on; in case of separated coils, each compressor controls
the fans of its own circuit.
2.5.3 Prevent function
High pressure alarm prevention with compressors stopped. Norm ally, the condensing fans turn on only if
compressors are enabled, but in this case they are forced so as to decrease pressure and try to prevent the
high pressure alarm, which would cause unit shutdown. Pressure increase wi th compressors stopped may
be due to radiance on the coil. In case of 0-10V modulating fans, modulation is by-passed.
2.5.4 Speed-up function
To overcome inertia at high-power m odulating fans peak, they may be started at maximum speed for some
seconds, then speed decreases to the required value and modulation starts.
2.5.5 Pressure – temperature conversion
Both pressure and temperature probes can be selected. In case of pressure probes, branch I/O screens
display the temperature value corresponding to the pressure of each probe, based on the coolant type (to be
selected in the Manufacturer branch).
2.6 Temperature set point compensation
The te mperature set point can be “compensated” automatically for comfort reasons; for example, think about
a commercial concern in which people frequently enter and go out: if internal temperature is 10°C lower than
the external one, the thermal rush may annoy people and could be prejudicial to their health. The maximum
difference between internal and external temperatures should not exceed 6°C in order to obtain optimum
comfort. In this case, the compensation function increases the set point by 4°C, consequently increasing the
ambient temperature; this function prevents the difference between internal and external temperature from
exceeding 6°C.
Compensation requires a temperature probe to be installed at the exterior. The function is managed based
on the values of compensation set point, differential and offset parameters, as shown in the following
diagram:
Compensation set
2°C Compensation
offset
25.0 28.0
3°C Ex ternal
Compensation proportional band temp. (°C)
25.0°C
23.0°C
Temperat ure
set-point (°C)
14 INNOV@-pCO1-IOM-0907-E
2.7 Compressors
Compressors are managed in ON-OFF mode. Maximum 2 compressors can be present.
2.7.1 Rotation
Compressors rotation follows the F.I.F.O. (first in, first out) logic. The first compressor turned on is the first to
turn off, the first compressor turned off is the last to turn on. This logic allows comparing the compressors
working hours and obtaining the same ageing. The rotation can be disabled.
2.7.2 Timing
START MINIMUM TIME
It represents the compressors start minimum time (in seconds) after they have been enabled. If a stop
request arises, compressors are disabled only after the established time has elapsed.
STOP MINIMUM TIME
It represents the compressors stop mini mum time (in seconds) after they have been disabled. If a start
request arises, compressors are enabled only after the established time has elapsed.
MINIMUM TIME BETWEEN DIFFERENT COMPRESSORS STARTS
It represents the mini mum time interval (in seconds) between start of a device and the following one. This
interval allows preventing contemporary peaks, which would cause a high energy absorption.
MINIMUM TIME BETWEEN COMPRESSOR STARTS
It represents the minimum time interval (in seconds) between two starts o f the same device. This parameter
allows limiting the number of starts per hour. If, for example, the maximum number of starts per hour allowed
by the default values is 10, this limit can be respected by setting a 360-second time interval.
2.7.3 Compressor alarms
Compressors alarms are distributed in two digital inputs, the alarms mean Thermal alarm / High and Low
pressure alarm.
HIGH PRESSURE – THERMAL ALARM
Immediate alarm originated by external pressure switch or compressor overload; the digital input switches
from closed to open and compressor is immediately stopped. To start the compressor again, the user has to
rearm the alarm manually by pushing the display Alarm button, provided that the pressure switch or
compressor overload have rearmed energising the digital input. After the compressor has turned off, timing is
enabled; for this reason, after alarm rearming, the compressor could not immediately turn on again.
LOW PRESSURE ALARM
Delayed alarm originated by an external pressure swit ch. When opening, the digital input enables two timers;
if, when the timers delay time (programmable by screen) elapses, the contact is open, the compressor turns
off and the alarm goes off. On the contrary, if the contact closes before delay time elapses, the alarm does
not go off and timers reset. Timers are: running compressor delay time and compressor start delay time.
Running delay is always counted, whereas compressor start delay is counted only if the input opens
immediately after compressor start and allows for fluid stabilisation. The two timers are counted in sequence.
INNOV@-pCO1-IOM-0907-E 15
To start the compressor again, the user has to rearm the alarm manually by pushing the display Alarm
button, provided that the pressure switch has rearmed energising the digital input. After the compressor has
turned off, timing is enabled; for this reason, after alarm rearming, the compressor could not immediately turn
on again.
GENERIC ALARM
Alarm including all compressor safety devices in a single digital input, used on two-compressor small boards.
This alarm goes off immediately when opening the digital input and locks the compressor. To start the
compressor again, the user has to rearm the alarm manually by pushing t he display Alarm button, provided
that the digital input has been energised. After the compressor has turned off, timing is enabled; for this
reason, after alarm rearming, the compressor could not immediately turn on again.
2.8 Heaters
The heaters are managed as simple ON-OFF loads. Normally up to 2 heaters with the same power can be
managed, connected to the 2 outputs.
“Binary management” allows the use of three heating steps with just two outputs and 2 loads with different
power values:
The outputs with binary logic behave as follows:
2 DIFFERENT LOADS
STEP 1 Heat.1 = On / Heat.2 = Off
STEP 2 Heat.1 = Off / Heat.2 = On
STEP 3 Heat.1 = On / Heat.2 = On
The outputs are activated with a slight delay from one to the other, to avoid simultaneous peaks.
2.8.1 Heater alarms
Each heater is provided with a digital input to be connected with a compressor overload or differential for
signalling any failure.
Immediate alarm originated when the digital input switches from closed to open; the heater is immediately
disabled. To enable the heaters again, the user has to rearm the alarm manually by pushing the display
Alarm button, provided that the compressor overload or the differential have rearmed energising the digital
input.
2.9 Modulating valves
2.9.1 Three-position valves
Valves with three electrical contacts (besides supply): shared, opening and closing.
Based on the relays enabling time, the valves opening range varies from 0% to 100% taking an
opening/closing time defined as “running time” (time taken to open or close completely; it is a valves rating).
The relays must never be enabled simultaneously, thus the valve open, close or keep still.
The valves opening range is calculated based on the proportion between temperature differential and
running time. When ambient temperature corresponds to the set point, the valves keep closed; the more
temperature is o ffset compared to the set point the more the valves are opened, until they open completely
when temperature is equal or higher than set point + / - differential.
During operation, the valves are frequently subject to partial opening and closing; the program can recognise
the valves opening range at any time by adding up and subtracting all partial times executed from board
start-up.
16 INNOV@-pCO1-IOM-0907-E
REALIGNMENT
As there is no feedback to define precisely the valves opening range, the program cannot easily manage the
three-position valves. A slight difference between the time calculated by the program and the relays enabling
time or a mechanical friction preventing the valves from moving freely may originate discrepancy between
the v a lves actual opening range and the range calculated by the program. To obviate this problem, the
following precautions are provided for:
whenever temperature control requires a valve complete opening or closing, the program increases
the opening or closing relay enabling time by 25% to ensure complete opening/closing.
whenever the board is started, the valves are completely closed during the running time; only after
time has elapsed, the valves start modulating their opening range based on the control request.
2.9.2 0-10Volt VALVES
These valves use a 0-10Volt modulating signal coming from the microprocessor to modify their opening
range from 0% to 100%.
The 0-10Volt electric s ignal is directly proportional to the temperature proportional band. Unlike the threeposition valves, these valves do not require adjustment since their opening range is directly proportional to
the analogue output value.
2.10 Outlet fan
With unit e nabled, the outlet fan keeps switched on. It can be managed with On–Off or modulating output.
The fan is provided with a thermal alarm and an air flow controller alarm, which lock the unit setting it to OFF
state; thermal alarm requires manual rearm, w hereas air flow controller alarm is rearmed automatically.
Description of modulating managemen t:
Temperature set
HEATING COOLING
100% 0% 0% 100%
19.5 22.5 23.0 23.5 26.5
3°C 0.5°C 0.5°C 3°C
Warm proportional band Cold proportional band
100% 100%
50%
Min speed (5.0V) Fan speed
Max speed (10.0V)
INNOV@-pCO1-IOM-0907-E 17
3 THE USER INTERFACE
The provided user interface PGD is equipped with a LCD display (4 rows x 20 columns). and with 6 keys. It
allows carrying out all program operations. The user interface allows displaying the unit working conditions at
any time and modifying the parameters; furthermore, it may also be disconnected from the main board, as its
presence is not strictly necessary.
3.1 Keyboard description
The PGD user interface has 6 keys and their use is describe in the following table.
Keys Description
ALARM key
Press ALARM key to enter the alarm menu and to reset the alarms. When an alarm
is present the button is illuminated.
PROGRAM key
Press PROGRAM key to enter the main menu where is possible to select the items:
MAINTENANCE, PRINTER, INPUT/OUTPUT, CLOCK, SETPOINT , USER,
MANUFACTURER
ESC key Press ESC key to go out from a menu and come back into the main screen.
UP key
Press UP key to move into the next screen or to increment the value of a
parameter.
ENTER key
Press ENTER key to move into the next modifiable parameter field and confirm the
modification
DOWN key
Press DOWN key to move into the previous screen or to decrement the value of a
parameter.
PROGRAM + ESC keys
Press simultaneously PROGRAM and ESC keys to enter directly the
MANUFACTURER menu.
ESC + ENTER keys
Press simultaneously for 5 seconds, ESC and ENTER keys to enter into the screen
where you can press ENTER to switch ON/OFF the unit
3.1.1 Switch ON/OFF of the unit
The unit is switch On/Off by pressing Esc + Enter keys simultaneously for 5 seconds; after, the displayed
screen allows executing the required operation by using Enter key.
3.1.2 Screen loop
Press PROGRAM key to display the main menu; then, by using the a rrow buttons, move the cursor on the
selected item and press Enter to access it.
18 INNOV@-pCO1-IOM-0907-E
3.2 Remote user interface
3.2.1 Without local display
3.2.2 With local display
Remote display
wall mounted Microprocessor pCO1
Unit
Remote display cable:
6 wires, with RJ11
connectors.
NOTE:
the cable is different from
the standard telephone
cable because in the
remote display cable the
connectors are reversed.
Local display
panel mounted
Remote display
wall mounted
Microprocessor pCO1
Unit
Derivator TCONN
(it is necessary only if local
and remote displays are
simultaneously present)
Remote display cable:
6 wires, with RJ11
connectors.
NOTE:
the cable is different from
the standard telephone
cable because in the
remote display cable the
connectors are reversed.
INNOV@-pCO1-IOM-0907-E 19
4 BOARD CO NFIGURATION AND CONNECT ION
The LAN network identifies a physical connection between the microprocessor, the display and the drivers
for the electronic expansion valves. This connection allows exchanging variables from a board to another,
according to a logic established by the software, to make them work together in a functional way. The
address of the boards must be configure even in stand alone unit.
4.1 Address configuration
4.1.1 Address configuration of the microprocessor (pCO1)
For the configuration of the address of the pCO1 follow these steps:
- connected the pCO1 with a display PGD wich the address configure to 0. (See Address configuration of the
PGD)
- switch ON the power supply pressing simultaneously the ALARM and the UP keys.
- press UP or DOWN key to set the address.
- press ENTER key to save and exit from this procedure.
4.1.2 Address configuration of the PGD
For the configuration of the address of the PGD follow these steps:
- press UP+ENTER+DOWN for few seconds
- press ENTER and then press UP or DOWN key to set the address.
- press ENTER key to save and exit from this procedure.
NOTES:
- If the addresses of the microprocessor or of the PDG a re non corrected, the functioning of the unit is not
guaranteed, and the PDG can displays nothing.
- after the address configuration of the PGD, it can display the notice “NO LINK” for some seconds.
4.1.3 Address configuration of the E2V electronic expansion valve’s driver
(EVD)
For the c onfiguration o f the driver (EVD) is necessary to set
the dip-switch (using a binary logic) that are present inside of
the driver, under the frontal box.:
Address Dip-switch
Driver for circuit 1 9
Driver for circuit 2 10
Open the
frontal box to
configure the
dip-switch.
20 INNOV@-pCO1-IOM-0907-E
4.2 Boards connection
The electrical connection among boards is executed using the following two type of cables:
Display connection
For the connection of the display is necessary to use a cable with 6 wires and RJ11 connectors; the cable is
different from the standard telephone cable because in the display cable the connectors are reversed.
LAN connection
For the LAN connection is necessary to use a cable with 2 wires plus shield, from unit to unit, by using the
terminal strip in the electrical panel (see the specific electrical diagram); the data are sent through Rs485
logic; no additional device is required.
4.2.1 Stand alone unit
4.2.2 Units connected in LAN (max. 8 units)
The units can be connected to the other units in LAN (local area network) for a maximum of 8 units. Each
unit can be connected (inside of it) to one or two drivers (EVD) for the management of the electronic valves
and to one display for user interface. In the following table are listed the addresses of the microprocessor, of
the drivers (EVD) and of the display.
List of addresses
Address of
Microproc. pCO1
Address of
EVD Driver 1
Address of
EVD Driver 2
Address of
Display
Config. by display Config. by dip-switch Config. by dip-switch Config. by display
Unit 1 1 9
10
25
Unit 2 2 11
12
26
Unit 3 3 13
14
27
Unit 4 4 15
16
28
Unit 5 5 17
18
29
LAN
cable
LAN
cable
pCO1: Address = 1
PGD: Address = 25
Driver 1:
Address = 9
Driver 2:
Address = 10
Display
cable
INNOV@-pCO1-IOM-0907-E 21
Unit 6 6 19
20
30
Unit 7 7 21
22
31
Unit 8 8 23
24
32
The address of the microprocessor can be read from the main screen in the lower right corner.
The display with address 32 allows controlling all boards without requiring other displays or in addition to
the other displays; as a matter of fact, the program allows display with address 3 2 to access the parameters
of all connected boards, one by one. Passage among the boards can be executed by simply pushing button
ESC + DOWN.
4.2.3 LAN status
When starting the system, the LAN network could undergo some problems (failed boards and displays
displays start-up) due to improper electrical connections or to the fact that incorrect addresses have been
assigned. By means of a special screen, the LAN network state can be displayed in real time, thus
identifying which devices (boards and displays) are properly connected and addressed. To display the
special screen, push buttons Up-Down-Enter of any network display si multaneously for at least 10 sec. After
the fi rst 5 seconds, a screen is displayed; continue for another 5 seconds until the following screen is
displayed:
As it can be seen, network addresses from 1 to 32 are displayed, together with a symbol indicating if a
display (small rectangle) or a board / valve driver (big rectangle) is concerned. The dash indicates that the
board / display has incorrect address or is connected improperly. In case the symbols appear and disappear,
it means that LAN is unstable or, more probably, that repeated addresses are present. The number following
T indicates the address of the display being used. The example indicates that the network consists of one
boards or valves drivers with address 1 and of one display with address 25. After the screen is checked, if
there is some trouble cut network power off, verify connections and addresses and power the system again.
4.3 Software update
If is necessary a software update the boards shall be programmed by DOWNLOADING the application
program to the Flash buffer memory; this operation can be performed either using the hardware key or a
computer.
4.3.1 Program download from hardware key
To connect the key to the pCO1, proceed as follows:
1. Switch the pCO1 off and remove the “expansion memory” cover using a screwdriver.
2. Place the key selector on .
22 INNOV@-pCO1-IOM-0907-E
3. Insert the key into the corresponding slot.
4. Press Up and Down together in the display and switch the board on.
5. Check that the red key LED comes on.
6. Wait until the upload request is displayed on the LCD, then release the buttons and confirm by pressing
Enter; the data transfer operation will take approximately 10 seconds.
7. Switch the pCO1 off, remove the key, place the cover in its original position and switch the board back on
again.
8. The board will now work with the program transferred from the key.
4.3.2 Program download from computer
Use the the converter (RS232/RS485) and the WinLOAD 32 program, proceeding as follows:
1. Connect the converter (RS232/RS485) to the mains using the transformer provided in the kit.
2. Connect the converter to a free serial port on the PC, using the serial cable provided in the kit.
3. Connect the converter to connector J10 on the pCO1 using a telephone cable.
4. Install Winload, if Winload is not already installed on the PC.
5. Run WinLOAD32 on the PC, with the board off.
6. Enter in the number of the PC serial port in the field “COMM” (1 for COM1, 2 for COM2).
7. Enter “0” in the field “pCO ADD.”.
8. Switch the board on.
9. Wait 30 seconds until the message “OFF LINE” becomes “ON LINE” in the WinLOAD32 program, in the
lower left, or until the yellow LED next to the dipswitch on the board s tarts flashing; now enter t he actual
board LAN address value in the field “pCO² ADD”; a blue light in the Winload program, in the bottom centre
of the window, will start flashing.
10. In WinLOAD32, select “Upload” and then “Application”.
11. Select the folder containing the application program source files.
12. Use CTRL to select a series of *.iup files, if needing to load a series of languages to the pCO1. Also
select the *.blb files (for non-LAN applications) or the flash1.bin file in the program being loaded (for LAN
applications).
13. Click “UPLOAD” to start the file download procedure, which will take approximately 1 to 5 minutes,
depending on the number of *.iup files selected and the size of the various files.
14. Wait until the message “Upload OK” appears in the progress bar.
15. Disconnect the telephone cable between the board and converter; connect the external display (if
featured), then switch the board off and on again.
NOTE: if a LAN network with a series of boards is used, the program can be installed on the other boards
without repeating the operations: after installing the program on the first board, simply repeat steps from 8 to
14, entering the new board addresses each time in the field “pCO ADD” in the WinLOAD32 program .
4.3.3 Restore the default parameters
Default parameters are the values assigned by manufacturer to the application program main operative
parameters. Parameters are assigned automatically when executing the DOWNLOAD operation as
described above. Parameters indicate timing, set points, differentials, etc… (refer to the complete list of
default values).
After installing default values, the parameters must be modified following the s pecial parameter list with the
specific parameter of the installed unit.
Operations to be carried out for default parameters manual installation:
1. Push buttons PRG + ESC keys and type the Manufacturer password, then push Enter.
2. By pushing button Down three times, move the cursor on “INITIALIZATION” (last row), then push ENTER.
3. The parameters installation screen is displayed; to install, push ENTER and type the Manufacturer
password.
4. WARNING: we recommend extreme care since this operation deletes all the installed p arameters from the
memory and replaces them by the default parameters – after this operation, parameters cannot be restored.
5. After pushing ENTER, message “PLEASE WAIT” is displayed for some seconds.
6. Switch off and then switch on the power supply.
INNOV@-pCO1-IOM-0907-E 23
4.3.4 Language selection
English is the language automatically selected, but it can be changed into: Italian, French, German, Spanish.
To modify the language, operate as follows:
1. Press the PROGRAM key, select the MAINTENANCE item and press ENTER
2. Press ENTER in the screen A0, and UP or DOWN to modify the language
3. Press ENTER to confirm the new language.
5 ALARMS
The alarms managed by the program safeguard soundness of the connected devices and provide signals in
case the control parameters have exceeded the normal values or the board is faulty. The alarms originate
from alarm digital inputs, probes or board. Their effect ranges from the simple block signalling of one or more
devices to the air-conditioning unit stop. Many alarms are subject to programmable delay times.
When an alarm state is identified, the following signals occur:
the red LED under button ALARM turns on
abbreviation AL starts blinking on the Menu screen
Pushing button Alarm, the buzzer switches off and the alarm screen is displayed. If more alarms are active,
the s c reen of the first alarm is displayed; the other alarms can be displayed by using the arrow buttons. If
other buttons are pressed, the alarm screens are left but they keep stored and are displayed again whenever
the Alarm button is pressed.
To rearm the alarms and delete the message manually, simply move the cursor on the alarm sc reens and
push button Alarm again; if the alarm causes have disappeared (digital inputs rearmed, temperature within
the normal values, etc…), the screens disappear, the red led switches off and message “NO ALARM
ACTIVE” is displayed. If the cause of one or more alarms is still active, the disabled alarms only disappear,
whereas the other alarms keep displayed and the buzzer and the red led switch on again.
Alarms are divided into two categories: manually-rearmed alarms or automatically-rearmed alarms.
The manually-rearmed alarms require alarm screen deleting (as described above) to restart the devices or
the ai r-conditioning unit. The automatically-rearmed alarms unlock the device or restart the air-conditioning
unit after the cause has disappeared, but the alarm screen keeps stored in the memory.
5.1 Table of alarms
CODE
DESCRIPTION
DELAY
UNIT OFF
DISABLED
A01 Compressor 1 general alarm
- - Compressor 1
A02 Compressor 2 general alarm - - Compressor 2
A03 Compressor 1 low pressure
see T2 - Compressor 1
A04 Compressor 2 low pressure
see T2 - Compressor 2
A05 No air flow see T4 yes All
A06 Outlet fan thermal
- yes All
A07 Heater 1 thermal
- - Heater 1
A08 Heater 2 thermal
- - Heater 2
A09 Fire / Smoke detection
- yes All
A10 Dirty filters - - A11 High ambient temperature
see T2 - -
A12 Low ambient temperature
see T2 - A13 High ambient humidity see T2 - A14 Low ambient humidity
see T2 - A15 Compressor 1 working hours threshold reached
- - -
A16 Compressor 2 working hours threshold reached
- - -
A17 Outlet fan working hours threshold reached
- - -
A18 Ambient temperature probe faulty or disconnected 60 sec (fixed) - A19
Recovery water temperature probe faulty or
disconnected
60 sec (fixed) - -
A20 External air temperature probe faulty or disconnected 60 sec (fixed) - A21 Outlet air temperature probe faulty or disconnected
60 sec (fixed) - -
A22 Ambient humidity probe faulty or disconnected
60 sec (fixed) - -
A23 Condenser 1 pressure probe faulty or disconnected
60 sec (fixed) - -
A24 Condenser 2 pressure probe faulty or disconnected
60 sec (fixed) - A25 Condenser 1 temperature probe faulty or disconnected 60 sec (fixed) - A26 Condenser 2 temperature probe faulty or disconnected 60 sec (fixed) - A27 High humidifier current
- - Humidifier
24 INNOV@-pCO1-IOM-0907-E
A28 No water inside humidifier cylinder
? - -
A29 No current in humidifier
? - A30 Clock card not present / faulty - - A31 Circuit 1 high pressure
- - Compressor 1
A32 Circuit 2 high pressure
- - Compressor 2
A33 Water under floor
- yes All
A34 Auxiliary alarm
- - -
A35 Compressor 1 high pressure + thermal
- - Compressor 1
A36 Humidifier working hours threshold reached
- - -
A37 Compressor 2 high pressure + thermal
- - Compressor 2
A38 Condensing fan 1 thermal - - Condensing fan 1
A39 Condensing fan 2 thermal
- - Condensing fan 2
A40 No water flow
see T4 yes All
A41 pLAN disconnected
60 sec (fixed) - -
A42 Driver 1 alarm, probes faulty or disconnected
- - Compressor 1
A43 Driver 1 EEPROM faulty or damaged
- - Compressor 1
A44 Driver 1 valve motor faulty or damaged
- - Compressor 1
A45 Driver 1 alarm, battery discharged or faulty
- - A46 Driver 1 high evaporation pressure (MOP) See Fj - A47 Driver 1 low evaporation pressure (LOP)
See Fj - -
A48 Driver 1 low superheating
See Fi - Compressor 1
A49 Driver 1 valve not closed during blackout
- - Compressor 1
A50 Driver 1 high suction pressure
See Fi - -
A51 Driver 2 alarm, probes faulty or disconnected
- - Compressor 2
A52 Driver 2 EEPROM faulty or damaged
- - Compressor 2
A53 Driver 2 valve motor faulty or damaged
- - Compressor 2
A54 Driver 2 alarm, battery discharged or faulty - - A55 Driver 2 high evaporation pressure (MOP)
See Fj - -
A56 Driver 2 low evaporation pressure (LOP)
See Fj - -
A57 Driver 2 low superheating
See Fi - Compressor 2
A58 Driver 2 valve not closed during blackout
- - Compressor 2
A59 Driver 2 high suction pressure
See Fi - -
A60
Built-in humidifier: high conductivity alarm
See threshold Gb:
delay 1h
- Humidifier
A61 Built-in humidifier: high conductivity pre alarm
See threshold Gb:
delay 1h
- -
A62 Built-in humidifier: low steam production
- Humidifier
A63 Built-in humidifier: water drain alarm
- Humidifier
A64 Built-in humidifier: cylinder full alarm
- Humidifier
A65 Built-in humidifier: cylinder being depleted signal - A66 Built-in humidifier: presence of foam
- A67 Built-in humidifier: cylinder depleted
- -
5.2 Alarm data logging
Alarms data logging allows storing the air-conditioning unit working state whenever an alarm goes off or
under particular conditions. Any storing operation becomes an event, which can be displayed as any other
event available in the memory. As it functions as a device for “taking photographs” of the system whenever
any alarm goes off, data loggi ng is extremely useful for suggesting possible c auses and s olving s ys tem
malfunctions and failures. The program is provided with a MAIN and a DEVELOPED data logging.
5.3 Main log
Events can be stored thanks to the boards very large buffer memory. The MAIN data logging can be enabled
by parameter; if the clock card (optional) is not available, neither the MAIN data logging is available. No
additional optional card is required.
The maximum number of storable events is 100; after the last space available in the memory (alarm no. 100)
is used, next alarm will be overwritten on the first alarm s tored (001), which will be automatically deleted.
This procedure applies to all following events. The user cannot delete the stored events except at the default
values installation. The MAIN data logging screen can be accessed by pushing button ALARM when screen
E4 is displayed and can be left by pushing button Esc. The screen is displayed as follows:
INNOV@-pCO1-IOM-0907-E 25
Whenever an alarm goes off, the following air-conditioning unit data are stored for each alarm:
alarm description
time
date
event chronological number (0-100)
The event chronological number, displayed in the upper right corner, indicates the event “stay time”
compared to the 100 available memory spaces. Alarm no. 001 represents the first alarm gone off after MAIN
data logging enabling.
Moving the cursor on the chronological number and using the arrow buttons, the alarms “history” can be
scrolled from 1 to 100.
In position 001 and pushing the down arrow, the alarms cannot be scrolled.
If, for example, 15 alarms have been stored and the cursor is in position 015, pushing the up a rrow, the
alarms cannot be scrolled.
26 INNOV@-pCO1-IOM-0907-E
6 SCREENS
The screens are divided into these categories:
MAINTENANCE: checking the devices periodically, calibrating the connected probes, modifying the working
hours and managing the devices manually. PASSWORD = 105
PRINTER: printing the list of parameter only with a special version of display. NO PASSWORD
INPUT/OUTPUT: allow to show the digital and analog input/output values. NO PASSWORD
CLOCK: allow setting and enabling the temperature and humidity time bands. PASSWORD = 108
SETPOINT: allow setting the temperature and humidity set points and regulating the clock. NO PASSWORD
USER: allow s etting the main functions (timing, sets, differentials) of the connected devices; PASSWORD =
108
MANUFACTURER: allow configuring the air-conditioning unit, enabling the main functions and selecting the
connected device. PASSWORD = available on request. This menu is divided into these categories:
CONFIGURATION, PARAM ETERS, CAREL EXV DRIVERS, TIMING AND INITIALIZATION.
6.1 List of the screens
The following list indicates the displayed screens. Columns represent the screens loops: the first screen (A0,
B0…) can be displayed by pushing the relevant button and the other screens can be scrolled by using the
arrow buttons. Codes (Ax, Bx, Cx…) are displayed in the screens upper right corner, so as to be easily
identified. The meaning of symbols “0”,”1”… is explained in the previous paragraph. Symbol PSW indicates
the screens for entering passwords.
MAIN MAINTENANC E PRINTER INPUT/OUTPUT CLOCK SETPOINT USER
M0 A0 H0 I0 K0 S0 PSW P0
M1 A1 H1 I1 PSW K1
S1 P1 M2 A2 I2 K2 P2 A3 I3 K3 P3
A4 I4 K4 P4 A5 I5 K5 P5 PSW A6
I6 K6 P6
A7 I7 K7 P7
A8 I8 K8 P8 A9 I9 K9 P9
Aa Ia Ka Pa Ab Ib Pb
Ac Ic Pc Ad Id Pd
Ae Ie Pe
Af If Pf Ag Ig Pg Ah Ih Ph
Ai Ii Pi
Aj Ij Pj Ak Ik
Al Il Am Im An In Io Ip Iq
Ir Is It Iu Iv
INNOV@-pCO1-IOM-0907-E 27
MANUFA C T URER
PSW Z0
Gb T5 Z1 Gc T6
CONFIGURATION
C0 Gd T7 C1 Ge T8 C2 Gf
INITIALISATION
V0 C3 Gg V1
C4 Gh V2 C5 Gi C6
Gj C7
Gk C8
Gl
C9 Gm Ca
Gn Cb
Go Cc
CAREL EXV DRIVER
F0 Cd
F1 Ce
F2
Cf F3 Cg
F4
Cj F5
Ci F6 Cl F7
Cm F8 Cn
F9 Co
Fa
Cp Fb
Co Fc Cp
Fd
PARAMETERS
G0 Fe
G1 Ff G2
Fg
G3 Fh G4
Fi G5
Fj
G6
TIM
ING
T0
G7 T1 G8 T2 G9 T3 Ga T4
28 INNOV@-pCO1-IOM-0907-E
7 LIST OF PARAMETERS AND DEFAULT VALUES
The table below lists the parameters in the program, together with the following information: screen code (the
screen code is displayed at the top right) to assist the identification of the parameter, the default value, the
minimum and maximum limits (range), and the unit of measure.
To find a specific parameter on the display, proceed as follows:
Identify the parameter in the table below and the corresponding screen code
Using the list of the screens (following paragraph) and the screen code, access the screen on the
display
PARAMETER DESCRIPTION SCREEN DEFAULT SPECIAL VALUE RANGE UOM
Maintenance Menu
Select display language A0 English En, It, Fr, De
Enter password A6 ---- 0-9999
Modify outlet fan operating hours A7 0 0-99 . 0-999 hours
Modify compressor 1 operating hours A7 0 0-99 . 0-999 hours
Modify compressor 2 operating hours A7 0 0-99 . 0-999 hours
Device operating hour threshold: main fan A8 99 0-99
hours x
1000
Device operating hour threshold: compr. circuit 1 A8 99 0-99
hours x
1000
Device operating hour threshold: compr. circuit 2 A8 99 0-99
hours x
1000
Humidity probe calibration A9 0 -9.9 – 9.9 %RH
Condenser 1 pressure probe calibration A9 0 -99.9 – 99.9 bar
Condenser 2 pressure probe calibration A9 0 -99.9 – 99.9 bar
Ambient temperature probe calibration Aa 0 -99.9 – 99.9 °C / °F
External temperature probe calibration Aa 0 -99.9 – 99.9 °C / °F
Supply temperature probe calibration Aa 0 -99.9 – 99.9 °C / °F
Recovery temperature probe calibration Ab 0 -99.9 – 99.9 °C / °F
Condenser 1 temperature probe calibration Ab 0 -99.9 – 99.9 °C / °F
Condenser 2 temperature probe calibration Ab 0 -99.9 – 99.9 °C / °F
Manual activation of digital outputs 1 – 2 – 3 Ac Off Off – On
Manual activation of digital outputs 4 – 5 – 6 Ad Off Off – On
Manual activation of digital outputs 7 – 8 – 9 Ae Off Off – On
Manual activation of digital outputs 10 – 11 – 13 Af Off Off – On
Manual activation of modulating outputs 1 – 2 Ag 0 0-10.0 Volt
Manual activation of modulating outputs 3 – 4 Ah 0 0-10.0 Volt
Manual activation of pre wash built-in humidifier Ai No No-Yes
Manual activation of total water drain built-in
humidifier
Ai No No-Yes
Hum. management: periodic drain enable Ai1 No No-Yes
Hum. management: periodic drain period Ai1 120 0-120 hours
Hum. management: stop delay Ai2 0 0-120 seconds
Hum. management: drain for inactivity period Ai2 3 1-199 hours
Hum. management: threshold running hours Ai3 4000 0 - 4000 hours
Driver 1 valve control mode Aj Automatic Auto-Man.
Driver 1 valve manual opening steps Aj 0 0-9999 Steps
Driver 2 valve control mode Ak Automatic Auto-Man.
Driver 2 valve manual opening steps Ak 0 0-9999 Steps
Driver 1 manual release on start-up Al No No-Yes
Driver 2 manual release on start-up Am No No-Yes
Enter new Maintenance password An ---- 0-9999
Printer Menu
Cyclical print interv al H1 24 0-999 hours
Send immediate print H1 No No-Yes
Clock Menu
Hour setting K0 current hour 0-23 hours
Minute setting K0 current minutes 0-59 minutes
Day setting K0 current day 1-31
Month setting K0 current month 1-12
Year setting K0 current year 0-99
Enter Clock password K1 ---- 0-9999
INNOV@-pCO1-IOM-0907-E 29
PARAMETER DESCRIPTION SCREEN DEFAULT SPECIAL VALUE RANGE UOM
Enable temperature / humidity / On-Off time
bands
K2 No / No / No No-Yes
Start and end hour for On-Off time bands F1-1and
F1-2
K3 9 / 13 / 14 / 21 0-23 hours
Start and end minutes for On-Off time bands F1-1
and F1-2
K3 0 / 0 / 0 / 0 0-59 minutes
Start and end hour for On-Off time band F2 K4 14 / 21 0-23 hours
Start and end minutes for On-Off time band F2 K4 0 / 0 0-59 minutes
Select On-Off time bands (F1,F2,F3,F4) for each
day
K5 F3 F1-F2-F3-F4
Start hour temperature bands 1 and 2 K6 0 / 6 0-23 hours
Start minutes temperature bands 1 and 2 K6 0 / 0 0-59 minutes
Set point temperature bands 1 and 2 K6 23.0 / 23.0 see P1 ºC / ºF
Start hour temperature bands 3 and 4 K7 12 / 18 0-23 hours
Start minutes temperature bands 3 and 4 K7 0 / 0 0-59 minutes
Set point temperature bands 3 and 4 K7 23.0 / 23.0 see P1 ºC / ºF
Start hour humidity bands 1 and 2 K8 0 / 6 0-23 hours
Start minutes humidity bands 1 and 2 K8 0 / 0 0-59 minutes
Set point humidity bands 1 and 2 K8 50.0 / 50.0 see P2 %RH
Start hour humidity bands 3 and 4 K9 12 / 18 0-23 hours
Start minutes humidity bands 3 and 4 K9 0 / 0 0-59 minutes
Set point humidity bands 3 and 4 K9 50.0 / 50.0 see P2 %RH
Enter new Clock password Ka ----
Setpoint Menu
Temperature set point S1 23.0 see P1 ºC / ºF
Humidity set point S1 50.0 see P2 %RH
User Menu
Enter user password P0 ---- 0-9999
Minimum and maximum temperature set point
limits
P1 -99.9 / 99.9 -999.9-999.9 ºC / ºF
Minimum and maximum humidity set point limits P2 0.0 / 100.0 0.0-100.0 %RH
Proportional temperature bands (differential) in
Heating and cooling
P3 3.0 / 3.0 0.0-100.0 ºC / ºF
Temperature dead zone (neutral zone) P3 0,5 0.0-99.9 ºC / ºF
Proportional bands in Humidification and
Dehumidification
P4 2.0 / 2.0 0.0-99.9 %RH
Maximum production allowed, built-in humidifier P4 70.0 0% -100% % kg/h
Show language screen at start-up P5 No No-Yes
Switch unit off from button P5 Yes No-Yes
Enable remote On-Off digital input P5 Yes No-Yes
Recovery water temperature set point P6 12,0 0-99.9 ºC / ºF
Recovery air temperature set point / Differential P6 3.0 / 2.0 0-99.9 ºC / ºF
Enable compensation function P7 No No-Yes
Outside air compensation set point P7 25.0 -999.9-999.9 ºC / ºF
Outside air compensation differential band P7 3.0 -999.9-999.9 ºC / ºF
Offset maximum of compensation of the set of
temperature
P7 2.0 -999.9-999.9 ºC / ºF
High and low ambient temperature alarms offset
respect the setpoint
P8 10.0 / 10.0 -999.9-999.9 ºC / ºF
High and low ambient humidity alarms offset
respect the setpoint
P9 20.0 / 30.0 0-100,0 %RH
Enable outlet limit function Pa No No-Yes
Outlet air set point for the limitation function Pa 15.0 -999.9-999.9 ºC / ºF
Outlet air differential for the limitation function Pa 5.0 -999.9-999.9 ºC / ºF
Assign type of alarm Serious/Minor AL01-AL20 Pb All N N-Y
Assign type of alarm Serious/Minor AL21-AL40 Pc All N N-Y
Assign type of alarm Serious/Minor AL41-AL60 Pd All N N-Y
Assign type of alarm Serious/Minor AL61-AL70 Pe All N N-Y
Board identification number for supervisory
network
Pf 1 0-200
Board communication speed for supervisory
network
Pf 1200 1200-19200 Baudrate
Serial communication protocol Pf Carel
Carel, Modbus,
Lon, RS232, Gsm
Telephone numbers entered on analogue modem Pg 0 1-4
Enter telephone numbers on analogue modem Pg 0 0…9,#,*,@,ˆ
Number of rings for GSM modem Pg 0 0-9
Password to write SMS text message Pg 0 0-9999
Destination GSM telephone number Pg 0 0…9,#,*,@,ˆ
30 INNOV@-pCO1-IOM-0907-E
PARAMETER DESCRIPTION SCREEN DEFAULT SPECIAL VALUE RANGE UOM
Number of rings for analogue modem Ph 0 0-9
Password for superv isor remote connection Ph 0 0-9999
Type of analogue modem Ph Tone Tone-Pulse
Enter new user password Pi ---- 0-9999
Manufacturer Menu
Enter manufacturer password Z0 ---- 0-9999
CONFIGURATION -->
Enable BMS C0 No No-Yes
Enable printer C0 No No-Yes
Select unit of measure for temperature probes
and parameters
C0 ºC ºC-ºF
Enable clock board C0 No No-Yes
Type of unit C1 ED ED-CW
Select refrigerant C1 R407C
R22,R134a,
R404a, R407C,
R410A
Number of compressors C2 2 1-2
Enable comp ressor capacity-control steps
(unloaders)
C2 No No-Yes
Heating mode C2 Heaters Heaters-Battery
Humber of heaters C2 2 0-1-2-Binary
Type of valve for heating battery C2 0-10Volt 0-10V / 3 points
Type of coil C3 C/H C/H-Cool
Type of valve for the coil C3 0-10Volt 0-10V/ 3 points
Heating mode C3 Heaters Heaters-Battery 2
Humber of heaters C3 2 0-1-2-Binary
Type of valve for heating coil C3 0-10Volt 0-10V/3 points
Digital input 5 configuration C4 Filter alarm
Flood alarm, Filter
alarm, Fire alarm
Digital input 12 configuration C5 Fire/smoke alarm
Fire/smoke alarm,
Water Flood alarm
Digital input 1 configuration C6 Fire/smoke alarm
Fire/smoke alarm,
Water Flood alarm
Digital output 7 configuration C7 Light alarm relay
Recovery valve,
Light alarm relay
Analog input 2 configuration C8 Pressure circ. 1
Pressure circ.1,
Temp. circ. 1,
Supply air temp.
Analog input 3 configuration C9 Pressure circ. 2
Pressure circ.2,
Temp. circ. 2,
Recovery temp.
Modulating output 1 configuration Ca Main fan damper
Recovery damper,
Main fan damper
Recovery type Ca Air Air, Water
Enable analog humidifier output Ca No No-Yes
Analog output 2 configuration Cb Recovery damper
Recovery damper,
Humidif. damper
Recovery damper enable Cc No No-Yes
Main fan damper presence Cc No No-Yes
Enable condensation function Cd No No-Yes
Type of condenser Cd Single Single-Separat.
Condensing output type Cd Inverter Inverter-Steps
Select number of condensing fans Cd 1 1-2
Maximum voltage threshold for Triac Ce 92,0 0-100 %
Minimum voltage threshold for Triac Ce 7,0 0-100 %
Duration of T riac impulse Ce 2 0-10
m
seconds
Logic of the dehumidification contact Cf NC NO-NC
Number of compressors enabled for
dehumidification
Cf 0 0-2
Enable cooling coil for dehumidification Cf No No-Yes
Enable built-in humidifier Cf No No-Yes
Type of humidifier Cg 3 Kg/h 400V 3Ph 3 Kg/h / 8 Kg/g
Maximum production Cg 70.0 0-100.0 %
Humidifier board type Cg PCOUMID000
PCOUMID200-
PCOUMID000
Enable humidity probe Ch Yes No-Yes
Type of signal from the humidity probe Ch Current
0-1V, 0-10V,
Current
INNOV@-pCO1-IOM-0907-E 31
PARAMETER DESCRIPTION SCREEN DEFAULT SPECIAL VALUE RANGE UOM
Minimum and maximum value measured by the
humidity probe
Ch 0.0 / 100.0 0-100.0 %RH
Enable pressure probe 1
Ci
No No-Yes
Type of signal pressure probe 1 Ci Current
0-1V, 0-10V,
Current
Minimum and maximum value pressure probe 1 Ci 0.0 / 30.0 -20.0 - 50.0 Bar
Enable pressure probe 2 Cj No No-Yes
Type of signal pressure probe 2 Cj Current
0-1V, 0-10V,
Current
Minimum and maximum value pressure probe 2 Cj 0.0 / 30.0 -20.0 - 50.0 Bar
Room temperature probe type Ck NTC NTC-PT1000
Enable supply air probe Ck Yes No-Yes
Supply air temperature probe type Ck NTC NT C-PT1000
Enable external temperature probe Cl No No-Yes
External temperature probe type Cl NTC NTC-PT1000
Enable recovery temp erature probe Cl No No-Yes
Recovery temperature probe type Cl NTC NTC-PT1000
Enable condenser 1 temperature probe Cm No No-Yes
Condenser 1 temperature probe type Cm NTC NTC-PT1000
Enable condenser 2 temperature probe Cm No No-Yes
Condenser 2 temperature probe type Cm NTC NTC-PT1000
LAN unit configuration Unit 1 (U1) Cn Present/No rotat.
Present/Rotation
Present/No rotat.
Not present
LAN unit configuration Unit 2-3 (U2-U3) Cn Not present
Present/Rotation
Present/No rotat.
Not present
LAN unit configuration Unit 4-5-6 (U4-U5-U6) Co Not present
Present/Rotation
Present/No rotat.
Not present
LAN unit configuration Unit 7-8 (U7-U8) Cp Not present
Present/Rotation
Present/No rotat.
Not present
Enable analog fan on analog out 2 Cq Yes No-Yes
Enable ex pansion card Cr Off Off-On
Enable ex pansion card alarm Cr Off Off-On
Expansion card alarm delay Cr 120 0-999 seconds
Reheating system Cs No Reheating
No Reheating,
Elect. Heaters, Hot
gas On/Off, Hot
gas modulat.
PARAMETERS -->
Enable comp ressors/cooling battery together with
recovery valve
G0 No No-Yes
Enable FIFO compressor rotation G1 Yes No-Yes
Temperature regulation type G1 Prop. Prop.-P+I
Logic of the capacity-control contact G1 NC NC-NO
Starting point to open modulating valve in cooling
(or single valve) with recovery (see G0)
G2 50.0 0.0-100.0 %
Starting and end point to open modulating valve in
cooling (or single valve)
G2 0.0 / 100.0 0.0-100.0 %
Starting point to open 3 position valve in cooling
(or single valve) with recovery (see G0)
G3 50,0 0.0-100.0 %
Starting and end point to open 3 position valve in
cooling (or single valve)
G3 0.0 / 100.0 0.0-100.0 %
Starting and end point to open modulating valve in
heating
G4 0.0 / 100.0 0.0-100.0 %
Starting and end point to open 3 position valve in
heating
G5 0.0 / 100.0 0.0-100.0 %
Starting and end point to open modulating valve in
recovery
G6 0.0 / 100.0 0.0-100.0 %
Minimum and maximum main fan speed G7 0.0 / 10.0 0.0-10.0 Volt
Main fan speed during dehumidification G7 5.0 0.0-10.0 Volt
Starting and end point to open modulating humid.
output
G8 0.0 / 10.0 0.0-10.0 Volt
Temperature differential to stop dehumidification G9 5.0 0-99.9 ºC / ºF
Temperature offset to restart dehumidification G9 4.0 0-99.9 ºC / ºF
Disable water drain for set point reduction Ga No No-Yes
Disable drain for ex tended humidifier standby Ga No No-Yes
Disable humidifier alarm messages Ga No No-Yes
High conductivity pre-alarm threshold Gb 1500 0-2000 uS/c m
32 INNOV@-pCO1-IOM-0907-E
PARAMETER DESCRIPTION SCREEN DEFAULT SPECIAL VALUE RANGE UOM
High conductivity alarm threshold Gb 2000 0-2000 uS/cm
Drain time as % of the man ufacturer value Gc 100 50-200 %
Drain frequency as % of the manufacture value Gc 100 50-200 %
High pressure alarm set point Gd 23.5 -99.9 - 99.9 bar
High pressure alarm differential Gd 1.0 -99.9 - 99.9 bar
Condensing (pressure) setpoint Ge 19.0 -99.9 - 99.9 bar
Condensing (pressure) differential Ge 4.0 -99.9 - 99.9 bar
Modulating condensing fan speed-up time Ge 30 0-999 seconds
Condensing (temperature) setpoint Gf 55.0 -99.9 - 99.9 ºC / ºF
Condensing (temperature) differential Gf 1.0 -99.9 - 99.9 ºC / ºF
Modulating condensing fan speed-up time Gf 30 0-999 seconds
Maximum and Minimum condensing fan speed Gg 10.0 / 0.0 0-10.0 Volt
Enable high pressure alarm Prevent function Gh Yes No-Yes bar
Prevent function set point (pressure) Gh 20.0 -99.9 - 99.9 bar
Prevent function differential (pressure) Gh 2.0 -99.9 - 99.9 bar
Enable high temperature alarm Prevent function Gi Yes No-Yes bar
Prevent function set point (temperature) Gi 70.0 -99.9 - 99.9 ºC / ºF
Prevent function differential (temperature) Gi 1.0 -99.9 - 99.9 ºC / ºF
Enable Master Control function Gj No No-Yes
Rotation mode for units in pLAN network Gk Automatic
Automatic,
Timezones,
Running Hours
Number of units set in Standby mode Gk 0
0-Number of unit in
Present/Rotat.
mode
Automatic rotation period for units in pLAN Gk 24 1-240 Hours
Timezones rotation hour for units in pLAN network Gl 22 0-23 Hours
Timezones rotation minutes for units in pLAN
network
Gl 00 0-59 minutes
Interval in days for timezones rotation in pLAN
network
Gl 3 1-7 days
Enable Force units by temperature in pLAN
network
Gm No No-Yes
Forcing delay for low and high ambient
temperature
Gm 3 / 3 0-999 minutes
Low room temp. diff. for forcing units in network Gn 8 0-99.9 ºC / ºF
Low room temp. offset for forcing units in network Gn 4 0-99.9 ºC / ºF
High room temp. diff. for forcing units in network Go 8 0-99.9 ºC / ºF
High room temp. offset for forcing units in network Go 4 0-99.9 ºC / ºF
Analog supply fan speed setting Gp 80 0-100% %
CAREL EXV DRIVERS -->
Number of drivers connected F0 0 0-2
Enable backup battery drive r 1 F0 No No-Yes
Enable backup battery drive r 1 F0 No No-Yes
Type of valve circuit 1 F1 10 (Carel E2V**P) 0-11
Superheating set point circuit 1 F1 6.0 2.0-50.0 ºC
Dead zone circuit 1 F1 0 0-9.9 ºC
Type valve circuit 2 F2 10 (Carel E2V**P) 0-11
Superheating set point circuit 2 F2 6.0 2.0-50.0 ºC
Dead zone circuit 2 F2 0 0-9.9 ºC
PID control – proportional gain circuit 1 F3 2.5 0.0-99.9
PID control – integration time circuit 1 F3 30 0-999 seconds
PID control – derivative time circuit 1 F3 5.0 0.0-99.9 seconds
PID control – proportional gain circuit 2 F4 2.5 0.0-99.9
PID control – integration time circuit 2 F4 30 0-999 seconds
PID control – derivative time circuit 2 F4 5.0 0.0-99.9 seconds
Threshold for low superheat protection circuit 1 F5 4.0 -4.0 - 10.0 ºC
Prot. threshold integration time, low superheat
circuit 1
F5 1.0 0-25.5 seconds
Threshold for low superheat protection circuit 2 F6 4.0 -4.0 - 10.0 ºC
Prot. threshold integration time, low superheat
circuit 2
F6 1.0 0-25.5 seconds
Percentage ratio between cooling capacity and
Driver capacity C 1
F7 30 0-100 %
Percentage ratio between cooling capacity and
Driver capacity C 2
F7 30 0-100 %
LOP threshold F8 -40.0 -70.0 - 50.0 ºC
LOP threshold integration time F8 4.0 0-25.5 seconds
MOP start delay F9 30 0-500 seconds
MOP threshold F9 16.0 -50.0 - 99.9 ºC
INNOV@-pCO1-IOM-0907-E 33
PARAMETER DESCRIPTION SCREEN DEFAULT SPECIAL VALUE RANGE UOM
MOP threshold integration time
F9 4.0 0-25.5 seconds
High condensing temp. protection threshold Fa 63.0 0-99.9 ºC
Integration time for high condensing temp.
threshold
Fa 4.0 0-25.5 seconds
High suction temperature threshold
Fb
30.0 0-100.0 ºC
Custom Valve: minimum steps Fc 0 0-8100
Custom Valve: max imum steps Fc 1600 0-8100
Custom Valve: closing steps Fd 3600 0-8100
Custom Valve: return steps Fd 0 0-8100
Custom Valve: enable extra step in opening Fe No No-Yes
Custom Valve: enable extra step in closing Fe No No-Yes
Custom Valve: operating current Ff 250 0-1000 mA
Custom Valve: holding current Ff 100 0-1000 mA
Custom Valve: frequency Fg 100 32-330 Hertz
Custom Valve: duty cycle Fg 50 0-100 %
Minimum evaporation pressure probe value Fh 0.0 -9.9 - 10.0 Bar
Maximum evaporation pressure probe value Fh 30.0 3.5 - 40.0 Bar
Low superheating alarm delay Fi 0 0-3600 seconds
High suction temperature alar m delay Fi 0 0-3600 seconds
LOP alarm delay Fj 0 0-3600 seconds
MOP alarm delay Fj 0 0-3600 seconds
TIMES .-->
Supply fan start and stop delay T0 10 / 20 0-999 seconds
Integration time for P+I temperature control T1 600 0-999 seconds
Travel time for 3 position valve T1 180 0-999 seconds
Low pressure alarm delay T2 180 0-9999 seconds
High-low temperature-humidity alarm delays T2 600 0-9999 seconds
Not serious alarm activation delay T3 0 0-9999 seconds
Serious alarm activation delay T3 0 0-9999 seconds
Air flow switch alarm delay T4 10 0-9999 seconds
Water flow switch alarm delay T4 10 0-9999 seconds
Minimum compressor off time T5 180 0-9999 seconds
Minimum compressor on time T5 60 0-9999 seconds
Delay between compressor starts T6 360 0-9999 seconds
Minimum delay between starts of different
compressors
T6 10 0-999 seconds
Cap. control activation delay T7 10 0-9999 seconds
Start delay between comps. of same circuit T7a 30 0-999 seconds
Stop delay between comps. of same circuit T7b 30 0-999 seconds
Heater start delay T8 3 0-9999 seconds
INITIALISATION .-->
Enter password for reset Default values function V0 ---- 0-9999
Delete BASIC alarm log V1 No No-Yes
Enter new manufacturer password V2 ---- 0-9999
34 INNOV@-pCO1-IOM-0907-E
8 ARCHITECTURE OF THE CONTROL SYSTEM
8.1 Microprocessor layout
Connector description
1. connector to the power supply [G(+),
G0(-)];
2. fuse 250 Vac, 2A delayed (T2 A);
3. universal analog inputs NTC, 0/1 V, 0/5
V, 0/20 mA, 4/20 mA;
4. passive analog inputs NTC and
ON/OFF;
5. passive analog inputs NTC;
6. Yellow LED indicating power supply on
and 3 indicator LEDs;
7. 0/10 V analogue o utputs and PWM
phase-cut outputs;
8. digital inputs at 24 Vac/Vdc;
9. digital inputs at 230 Vac or 24 Vac/Vdc;
10. connector with Vref for 5V power supply
to probes and V Term fo r power supply
to display;
11. connector for all standard displays in
the pCO series and for downloading t he
application program;
12. pLAN local network connector;
13. connector for connection to the
programming key;
14. digital outputs to relay;
15. flap for selection of analog input type;
16. flap for installation of serial board:
- RS485 for supervisor (optional)
- Gateway (protocol converter, optional)
17. flap for installation o f clock board
(optional) .
Figure 15: Layout microprocessore
INNOV@-pCO1-IOM-0907-E 35
8.2 Configuration list
The pCO1 boards allow managing both “DX” direct expansion and “CW” water coil air-conditioning units.
When started, the program recognises the board type and size, consequently prearranging inputs and
outputs, also based on the air-conditioning unit type (DX or CW) established in the Manufacturer branch.
Note:
For the input/output configuration see the electrical diagram.
8.3 Accessories
8.3.1 Electronic expansion valve
The EVDriver module for the control of the electronic expansion valves (EEV) for LAN network allows the
inlet overheating control for amore efficient and versatile operation of the refrigerating unit.
Efficient because the optimisation and the stabilization of the refrigerant flow to the evaporator increase the
performance of the installation assuring at the same time the safety (less activations of the low pressure
switch, less backflows of the refrigerant to the compressor,…).
Moreover, if the EEV has been properly dim ensioned, using the floating or low setpoint condensation (and
evaporation) pressure increase remarkably the efficiency of the installation allowing less energy consumption
and a better refrigerating yield.
Versatile because using the electronic expansion valve implies the possibility to manage refrigerating units
with very different capacities and in different operating conditions.
The use of the electronic expansion valve implies the installation not only of the EVDriver or the expansion
valve themselves, but also of a temperature sensor and a pressure transducer, both of them placed at the
end of the evaporator on the refrigerant side (on the compressor inlet pipe). Refer to the following diagram
for a better understanding of the typical installation layout.
The base principle of the new control algorithm aims at the installation stability combined with, when
possible, a quick achievement of the overheating steady state.
In this sense, the priorities to be considered for an optimum control of the refrigerating installation are a high
and constant refrigerating yield rather than an extremely low and stable overheating.
The heart of the control is a PID controller that features coefficients that can be set for the overheating.
The additional controls are:
LOW (Low overheating with integral time and adjustable threshold)
LOP (Low evaporation pressure, operating actually only on transients, with integral
time
and adjustable threshold)
36 INNOV@-pCO1-IOM-0907-E
MOP (High evaporation pressure, with integral time and adjustable threshold)
HiTcond (High condensation pressure that can be activated only by condensation
pressure
probe read by pCO, with integral time and adjustable threshold).
In the parameter table, the control parameters, with the thresholds and the default values, are described.
8.3.2 Accessories
SERIAL CARDS
The Rs485 serial card allows interfacing pCO1 boards directly to a Rs485 network. The maximum available
baud-rate corresponds to 19,200 (programmable by parameter). Connection with Rs485 network is executed
by connecting the extractible connector to the board displays. As for connections, refer to the instruction
sheet.
CLOCK CARD FOR pCO1
The c lock option card allows managing the hour and date (day, month, year) for functions such as the time bands. The clock card
shall be inserted by removing the relevant port placed on its connector.
PCO200KEY0 HARDWARE KEY FOR pCO1
The hardware key allows downloading the application program to the pCO1 board in the place of the computer; furthermore, it also
allows uploading the Flash memory contents to the key.
INNOV@-pCO1-IOM-0907-E 37
8.3.3 Built-in humidifier
Integrated management of a Carel immersed e lectrode humidifier. The pCO1 boards manage all the
functions, from the rea ding of the humidifier parameters to the control o f the devices (fill, drain, output) by
relay. The humidifier parameters (current, conductivity, level) are not read directly, but rather using an
elettronic card. The LCD display features screens for controlling the humidifier. The program controls the
steam output and the humidifier operating conditions based on the humidifier current and ambient humidity
signals; furthermore, it manages
and displays all states and alarms.
9 SUPERVISION
pCO1 can be connected with a local or remote supervisory PC, a GSM or traditional m odem and the most
spread BMS (Modbus, Bacnet, Lonworks). To be used, the listed functions require the installation of optional
cards (Rs485, Rs232, LON) or Gateways (devices able to interpret different communication protocols).
9.1 Supervisor and bms
Advanced Control pCO - Local Area Network
Max. number of units: 8
Description:
- Master / Slave function:
the “master” unit temperature and humidi ty probes mus t be located in an “intermediate” posit ion inside the
controlled environment. The “master” unit drives the logic to be adopted from all connected units. That’s
important to avoid situations like units in dehumidification and units in humidification at the same ti me and in
the same environment. The “Master” unit modifies the working logic in case the measured temperature or
humidity exceed the set point, even by few decimal points. In case of black-out or “master” unit
disconnection from LAN network, the connected units start functioning independently based on the their own
probes only.
- Stand-by rotation activated by timing, time band or automatic on event.
- Stand-by rotation of 1 to N-1 unit (where N is the number of installed unit)
Remote Display
Local Area Network
STAND-BY UNIT
STAND-BY UNIT
Unit 1
With Local
Display
Unit 2 Unit 3
Unit 8
38 INNOV@-pCO1-IOM-0907-E
HiNet supervising systems
It allows air-conditioning systems to be monitored and controlled using a simple
Internet browser: the pages displayed on the PC are in HTML format, the language of the worldwide web.
BMS integration
DATACCOL units can be connected to the BMS in the following ways:
- directly, without using a gateway, thanks to the ability of the advanced control pCO to select the protocol
used;
- using a gateway that converts the Carel proprietary protocol to the protocol used by the BMS;
- integrating the driver for the management of the Carel proprietary protocol into the BMS.
Loca l Supervision PC
with Hi Net
RS485 serial line
Remote Supervision PC
with Hi
Net
Unit with Advanced
Control
Unit with Basic
Control
Connected by:
- analog telephone line
- gsm line
- eth ernet
-
internet worldwide web
BMS line
Unit 1 Unit 2 Unit 3 Unit N
other devices of Building Management System
INNOV@-pCO1-IOM-0907-E 39
The following protocols are used to ensure connectivity to the other systems:
- Carel proprietary (with HiNet supervision system, N = 200)
- Modbus (with gateway for Basic Control, N = 16; integrated for Advanced Control, N = )
- Bacnet (with gateway, N = 8)
- TCP/IP (with web-gate, N = 16)
- Echelon LonWorks (only with Advanced Control)
- Trend (only with Advanced Control)
- OPC standard (OLE for Process Control). This allows a simple integration to SCADA OPC Client Systems.
[ SCADA =Supervisory Control And Data Acquisition ]
9.2 Gsm protocol
By selecting the GSM protocol, SMS (text) messages can be sent to and from GSM phones, using a GSM
modem. The pCO1 sends a message to the phone in the event of alarms, and can receive messages from
the telephone at any time; the user can in fact use a GSM phone to modify some of the unit's parameters, as
listed below:
Parameter
Unit Add. 1 Unit Add. 2 Unit Add. 3 Unit Add. 4 Unit Add. 5 Unit Add. 6 Unit Add. 7 Unit Add. 8
Temperature set point analogue 1 analogue 10 analogue 19 analogue 28 analogue 37 analogue 46 analogue 55 analogue 64
Humidity set point analogue 2 analogue 11 analogue 20 analogue 29 analogue 38 analogue 47 analogue 56 analogue 65
2Recovery set point analogue 3 analogue 12 analogue 21 analogue 30 analogue 39 analogue 48 analogue 57 analogue 66
Compensation set point analogue 4 analogue 13 analogue 22 analogue 31 analogue 40 analogue 49 analogue 58 analogue 67
Low temperature alarm
threshold offset
analogue 5 analogue 14 analogue 23 analogue 32 analogue 41 analogue 50 analogue 59 analogue 68
High temperature alarm
threshold offset
analogue 6 analogue 15 analogue 24 analogue 33 analogue 42 analogue 51 analogue 60 analogue 69
Low humidity alarm
threshold offset
analogue 7 analogue 16 analogue 25 analogue 34 analogue 43 analogue 52 analogue 61 analogue 70
High humidity threshold offset analogue 8 analogue 17 analogue 26 analogue 35 analogue 44 analogue 53 analogue 62 analogue 71
Outlet air limit set point analogue 9 analogue 18 analogue 27 analogue 36 analogue 45 analogue 54 analogue 63 analogue 72
Unit On-off digital 1 digital 2 digital 3 digital 4 digital 5 digital 6 digital 7 digital 8
N.B. When the GSM protocol is active, the remote supervisor cannot call the pCO1 board.
40/43
9.3 Examples of installation
The connection of pCO1 boards in LAN network allows for the following functions:
1. balancing air-conditioning units working hours by spare units (in stand-by mode) rotation.
2. spare units start-up in case other units stop due to serious alarms or black-out.
3. spare units start-up to compensate for the excessive thermal load.
4. controlling up to 8 air-conditioning units by a single external LCD display.
5. o peration of all a i r-conditioning units according to Master air-conditioning unit probes to adjust
units operation.
6. managing alarms printing and probes values by shared external display.
Connection in LAN network allows configuring a wide range of systems. The following list includes the main
system types to be possibly created, in order of complexity, and provides suggestions for executing
connections:
1. one or more independent air-conditioning units (board(s) with LAN address 1 + external
display(s), if any, with LAN address 25);
2. two or more a i r-conditioning units and one external display (boards with LAN addresses 1-8
connected with Rs485 via J11, display with LAN address 32 connected with one of the boards); this
connection allows for the functions listed in the previous paragraph;
3. two or more air-conditioning units in LAN network, each provided with private display (boards with
LAN addresses 1-8 connected with Rs485 via J11, displays with LAN addresses 25-32 connected
with the relevant board); this connection allows for the functions listed in the previous paragraph.
Networks in which boards are connected with the LAN allow selecting the units involved in the Rotation
functions, thus obtaining a mixed network with interacting and independent units.
LAN connection among the boards allows using a shared external display (add. 32) in addition to the boards
private displays; this solution is adopted where private displays are assembled on the air-conditioning units
and the shared display i s installed inside a room.
IMPORTANT: if only one board is being used, it must have LAN address 1; no LAN electric connection is
required and the external display, if any, must have LAN address 25.
9.4 Shared external display
The Menu main screen shows the LAN address of
the displayed board in the upper right corner; in
private displays, it is a fixed number corresponding
to the LAN address of the board they are connected
with (1-8).
Display no. 32 allows selecting the board to be
displayed by pushing button Info; whenever a button
is pressed, the address displayed in the upper right
corner increases by 1 and the display shows the
parameters of the board selected among the
connected ones.
In case of a board alarm, the shared display
automatically connects with it to display the alarm.
The shared display can be connected to any
network board; in case of boards equipped with
built-in display, the shared display must be
connected to connector J10 by a telephone cable; in
case of boards equipped with private external
display, shown in the following figure, is required
(private=Term n; shared=Term n+1):
The shared display only allows printing all boards
alarms and parameters.
INNOV@-pCO1-IOM-0907-E 41
9.5 Automatic start and stand-by units
The boards connected with LAN network may be managed directly by the program under “critical situations”,
that is in case of failure (alarms, black-out…) or due to “Rotation” and “Forcing” functions.
The program acts based on some parameters that can be displayed and modified on the board with LAN
address 1:
Boards mode operation: Not present, Present/No Rotation, Present/Rotation. These are 8
parameters, one for each board. Not present: unit not connected. Present/No Rotation: unit
physically connected with LAN network but not involved in the rotation function (however, unit can
manage the shared display, printing and Master Control function). Present/Rotation: unit involved in
Rotation too.
Numb er of units in stand-by mode: this parameter establishes the number of units, among the ones
selected in Present/Rotation mode, that must be set to stand-by mode (turned off, waiting for
enabling) w hen starting the unit by button. The parameter is automatically included between 0 and
the total number of Present/Rotation units minus one, to ensure start-up of at least one unit.
IMPORTANT. The following functions cannot be executed if:
at least two units selected in Present/controlled mode are not present
the stand-by units set number is 0
The board with LAN address 1 provides for functions management; if the board is disconnected from LAN
network or it shuts down due to a black-out, the stand-by boards enable and the functions will be suspended
until unit 1 is reset. On the contrary, unit 1 stop by On-off or remote On-off button does not interrupt network
functions execution.
9.5.1 Critical situations
Units in Present/Rotation and stand-by modes are enabled in any of the following critical situations
concerning the running boards:
one of the boards has power cut off (black-out).
one of the boards s ignals a Serious alarm that enables alarm relay no. 8 (each alarm c an be
programmed as serious or non-serious).
one of the boards disconnects from LAN network due to Rs485 line disconnection.
one of the boards is shut down by button or remote On-off digital input.
one of the boards is shut down due to a serious alarm (refer to alarms table).
In case a running unit is involved in any of the listed situations, a stand-by board is automatically enabled to
reset the number of running units. If, for example, two running units break or disconnect, the program
enables two stand-by units; when one of the units under critical situation resets, it is started again and the
spare unit returns to stand-by mode. If a critical situation involves the stand-by units, no LAN action occurs,
with the exception of alarm signalling on the involved unit.
9.5.2 Forcing
Units in Present/Rotation and stand-by modes are enabled automatically in c ase a running unit does not
reach the temperature set point for a certain time interval due to an excessive thermal load. Each unit
running in such a situation can require enabling of a stand-by unit. The parameters to be set for forcing are
Differential, Offset and Delay time, different for heating and cooling. The following diagram shows the forcing
function:
Forcing delay in Forcing delay in
heating mode cooling mode
Temperature set
HEATING COOLING
Ambie nt
12.0 16.0 20.0 23.0 26.0 30.0 34.0 temp.(°C)
4°C 3°C 3°C 4°C
Warm forc. offset Warm band Cold band Cold forc. offset
8°C 8°C
Warm forcing differential Cold forcing differential
42/43
9.5.3 Fixed-hour rotation
A system consisting of both running and stand-by units is subject to unbalance in the working hours, causing
running units to age faster than stand-by ones. To obviate this problem, LAN network can provide for units
rotation, favouring balancing in the working hours. In practice, rotation sets a running unit to stand-by mode
and starts a stand-by unit.
The fixed-hour rotation is based on a parameter establishing the rotations time interval. The programmable
minimum time is 0h; in this case, automatic rotation enables every 5 minutes as a test. The maxi mum time is
240h (10 days). Time is counted from start-up of the unit with LAN address 1 that manages rotation.
Rotation can be executed following the LAN addresses logic or the units working hours.
Selecting the addresses logic, the unit with highest address (among the running ones) switches from on to
stand-by mode, whereas the unit withì lowest address switches from stand-by mode to on.
Selecting the working hours logic, the unit with highest working hours (among the running ones) switches
from on to stand-by mode, whereas the unit with lowest working hours switches from stand-by mode to on.
9.5.4 Fixed-day rotation
The clock card (optional) allows setting the hour and the days interval (max. 7) for units rotation. Logic is the
same as the fixed-hour rotation, but in this case the rotation interval can be programmed for a determined
day and hour.
9.5.5 Rotation based on working hours
This type of rotation involves the units with highest and lowest working hours, switching the former to standby mode and the latter to On mode. The reference working hours for this type of rotation are the same as
the outlet fan ones; due to practical reasons, they can be modified in screens E6 and E7 of branch
Maintenance.
9.6 Master control
The units connected with LAN network and in Present/… mode follow the working logic of the unit with LAN
address 1, functioning as a “driver” unit so that the system can work with the same logic. This precaution
prevents units from having opposite logic, something that may occur in wide environments with different
temperatures or humidity areas. In such e nvironments, each unit c o uld follow the indications of the relevant
probe, causing the uncontrolled start of humidification, dehumidification, heating or cooling. This would
nullify their effect and cause energy waste.
WARNING: the “driver” unit temperature and humidity probes must be located in an “intermediate” position
inside the controlled environment.
The “driver” unit sends the information concerning the logic to be adopted to the LAN network. Therefore,
the network units found devices enabling on both reading of the relevant probes and “driver” unit order, so
that devices can turn on in case the two factors coincide.
The “driver” unit modifies the working logic in case the measured temperature or humidity exceed the set
point, even by few decimal points.
In c ase of black-out or “driver” unit disconnection from LAN network, the network units start functioning
independently again based on the relevant probes only.
INNOV@-pCO1-IOM-0907-E 43
9.7 Technical data
General specifications
operating conditions -10T60 °C 90% R H not condensing
protection rating IP20, IP40 on front panel only
heat and fire resistance class class D (UL94 - V0)
Immunity against over voltages Class 1
number of manoeuvring cycles of automatic
operations (e.g.: relay)
100 000
Class and structure of software Class A
Electrical specifications
power supply (controller with connected
display)
22 to 38 Vdc and 24 Vac ±15% 50/60 Hz. M aximum power
consumption: 13 W
terminal block with extractable male/female connectors
maximum voltage: 250 Vac; cable size (2mm): min 0.5 to max 2,5
CPU H8S2322 16 bits 14 MHz
program memory (on FLASH MEMORY) 16 bit organisation: 1 MByte (expandable to 2 MByte)
data memory (static RAM) 8 bit organisation: 128 kByte (expandable to 512 MByte)
Serial Board 16 bits organisation 4 kByte
(upper limit: 400,000 recordings per memory location)
useful pCO1 cycle with applications of
medium complexity
0.5 s
Analog inputs
number 8
Analog conversion A/D converter 10 bit CPU built-in
type
Passive: NTC (inputs B5. B6, B7, B8) or clean contact digital input
(5mA), selectable via dip-switch (B5-B6)
Universal: NTC (see passive type), voltage 0 to 1 Vdc or 0 to 5 Vdc,
current 0 to 20 mA or 4 to 20 mA , selectable via dip-switch (B1, B2,
B3, B4)
Digital inputs
number 14
type - optoisolated inputs at 24 Vac 50/60 Hz or 24 Vdc (ID1 to ID12)
- optoisolated inputs at 24 Vac 50/60 Hz or 230 Vac (ID13 to ID14)
Analog outputs
number 4
type - optoisolated 0 to10 Vdc outputs (Y1 and Y2)
- optoisolated PWM outputs phase-cut with 5 V pulse (Y3 and Y4)
power supply external power supply 24 Vac/Vdc
output resolution 8 bit
maximum load
1k (10 mA) at 0 to 10V and 470 (10 mA) at PWM
Digital outputs
number 13
Type -with electromechanical relays
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Pour respecter ses engagements, Lennox s’efforce de fournir
des informations les plus précises. Néanmoins, les spécifi cations,
valeurs et dimensions indiquées peuvent être modifi ées sans
préavis, sans engager la responsabilité de Lennox.
Une installation, un réglage, une modifi cation, un entretien ou une
opération de maintenance inappropriés peuvent endommager le
matériel et provoquer des blessures corporelles.
L’installation et la maintenance doivent être confi ées à un installateur
ou à un technicien de maintenance qualifi é.
INNOVA-pCO1-IOM-0907-F
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