CLIMAVENETA CVM 2 Manual de usuario
TECHNICAL MANUAL
CVM 2
C 5001 CV/04-99 GB
1
Summary
1 CONNECTIONS ..............................................................................................................................4
1.1 TEMPERATURE PROBES.............................................................................................................4
1.2 PRESSURE PROBES.......................................................................................................................5
1.3 LIVE DIGITAL INPUTS................................................................................................................6
1.4 RELAY OUTPUTS .......................................................................................................................6
1.5 SERIAL CONNECTIONS ..............................................................................................................7
1.6 KEYBOARD...................................................................................................................................7
1.7 REMOTE KEYBOARD..................................................................................................................7
1.8 POWER SUPPLY...........................................................................................................................8
2 SETUP................................................................................................................................................8
2.1 ACCESS TO PROGRAMMING.......................................................................................................8
3 SOFTWARE.....................................................................................................................................9
3.1 DESCRIPTION OF USER INTERFACE .........................................................................................9
3.2 UNIT STARTUP............................................................................................................................9
3.3 UNIT SHUTDOWN.....................................................................................................................10
3.4 ALARMS...................................................................................................................................10
3.4.1 Circuit and/or compressor alarms..............................................................................10
3.4.2 General alarms...............................................................................................................10
4 ALARM SIGNALS ........................................................................................................................11
5 HOW TO VISUALISE THE RESOURCE STATUS .................................................................13
5.1 VISUALISATION OF UNIT'S RESOURCE STATUS....................................................................13
6 REGULATION................................................................................................................................15
6.1 CHILLED WATER REGULATION.............................................................................................15
6.2 HOT WATER REGULATION.....................................................................................................15
7 PARAMETER LIST.......................................................................................................................16
8 ENCLOSURES ...............................................................................................................................23
TECHNICAL MANUAL
CVM 2
C 5001 CV/01-99 IT
2
Board description
The system consists of a main board which is located inside the electrical panel, and of a keyboard
(Enclosures fig. 1). The boards for the continuous adjustment of the fan speed are connected to the
main board. The keyboard communicates with the main board through a serial current-loop and
receive the power supply from the main board.
Figure 1-0 COMPLETE SYSTEM
TECHNICAL MANUAL
CVM 2
C 5001 CV/04-99 GB
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32
31
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1
50
49
48
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46
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42
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33
Figure 1-1MAIN BOARD
TECHNICAL MANUAL
CVM 2
C 5001 CV/01-99 IT
4
1Connections
1.1 Temperature probes
The connected temperature probes are 3, or 4 in the case of water-water heat pumps with reversing cycle on the water side.
TERMINALS MEANING
1, 2 Inlet water temperature
3, 4 1st evaporator outlet water temperature
5, 6 2nd evaporator outlet water temperature (only with plate
heat exchangers)
7, 8 (only for water-water heat pumps
with reversing cycle on the water side) Condenser inlet water temperature
Temperature [°C] -55 -50 -40 -30 -20
Resistance [Ω]485 510 562 617 677
Temperature [°C] -10 010 20 25
Resistance [Ω]740 807 877 951 990
Temperature [°C] 30 40 50 60 70
Resistance [Ω]1029 1111 1196 1286 1378
Temperature [°C] 80 90 100 110 120
Resistance [Ω]1475 1575 1679 1796 1896
Temperature probes verification procedure:
•disconnect the power supply to the unit;
•disconnect the probe from microprocessor’s terminals;
•use a digital Ohmmeter to measure the resistance value of the probe;
•measure the temperature near the probe cap;
•compare the resistance value measured with the one shown in the table: the corresponding temperature must be
approximately the same as the measured one.
TECHNICAL MANUAL
CVM 2
C 5001 CV/04-99 GB
5
1.2 Pressure probes
There are two 4-20mA , 0-30 bar pressure probes for all the units, except for the water-water heat pumps with reversing cycle
on the water side.
TERMINALS MEANING
7, 8 1st circuit condensing pressure
9, 10 2nd circuit condensing pressure
Pressure [Bar] 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5
Current [mA] 4.00 4.27 4.54 4.80 5.07 5.34 5.61 5.87
Pressure [Bar] 4.0 4.5 5.0 5.5 6.0 6.5 7.0 7.5
Current [mA] 6.14 6.41 6.68 6.94 7.21 7.48 7.75 8.01
Pressure [Bar] 8.0 8.5 9.0 9.5 10.0 10.5 11.0 11.5
Current [mA] 8.28 8.55 8.82 9.08 9.35 9.62 9.89 10.15
Pressure [Bar] 12.0 12.5 13.0 13.5 14.0 14.5 15.0 15.5
Current [mA] 11.43 10.69 10.96 11.23 11.49 11.76 12.03 12.30
Pressure [Bar] 16.0 16.5 17.0 17.5 18.0 18.5 19.0 19.5
Current [mA] 12.56 12.83 13.10 13.37 13.63 13.90 14.17 14.44
Pressure [Bar] 20.0 20.5 21.0 21.5 22.0 22.5 23.0 23.5
Current [mA] 14.70 14.97 15.24 15.51 15.77 16.04 16.31 16.58
Pressure [Bar] 24.0 24.5 25.0 25.5 26.0 26.5 27.0 27.5
Current [mA] 16.84 17.11 17.38 17.65 17.92 18.18 18.45 18.72
Pressure transducer verification procedure:
•switch off the compressors and leave the unit with only the “ON/OFF switch” button ON;
•disconnect the cable from terminal 7 or 9 of microprocessor, depending on the probe;
•place digital milliammeter between the disconnected terminal and the cable and read the current value;
•read the pressure value using a gauge placed near the transducer;
•compare the readings with the values shown in the table.
TECHNICAL MANUAL
CVM 2
C 5001 CV/01-99 IT
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1.3 Live digital inputs
The following table shows the logic meaning of the AT digital inputs (230 Vac) and their arrangement:
TERMINALS MEANING
11, 12, 17 Common to all high voltage inputs
22 -AT1 Circuit 1 high pressure switch
16 -AT2 Circuit 2 high pressure switch
23 -AT3 Circuit 1 low pressure switch
15 –AT4 Circuit 2 low pressure switch
18 –AT5 Circuit 1 compressor thermal protection
14 –AT6 Circuit 2 compressor thermal protection
19 –AT7 Circuit 1 fans thermal protection
13 –AT8 Circuit 2 fans thermal protection
20 –AT9 Water differential pressure switch and external flow switch
21 –AT10 ON/OFF switch
1.4 Relay outputs
RELAY N.O. N.C. COM.
RL1 Cumulative alarm 41 39 40
RL2 Antifreeze 44
RL3 circuit 1 fan control 35 34
RL4 circuit 1 compressor control 43
RL5 circuit 2 compressor control 36 37
RL6 circuit 2 fan control 33
RL8 circuit 1 4-way valve control 46 47 45
RL9 circuit 2 4-way valve control 38
RL10 water pump control 42
TECHNICAL MANUAL
CVM 2
C 5001 CV/04-99 GB
7
LOCAL
REMOTE
1.5 Serialconnections
8-pin, TTL telephone-type connector.
1.6 Keyboard
It is connected to the following terminals, as indicated in the figure below:
KEYBOARD TERMINALS MAIN BOARD TERMINALS
428
329
131
232
Figure 1-1KEYBOARD CONNECTION
1.7 Remote keyboard
Figure 1-2REMOTE KEYBOARD CONNECTION
NB: The supplementary transformer is the 230/12 Vac transformer supplied with the remote keyboard kit.
The maximum length of the remote keyboard’s AWG24-type serial cable is 50 metres.
BASE CVM 2
112Vac 31
212Vac 32
3Current loop è29
4çCurrent loop 28
BASE CVM 2
112Vac 31
212Vac 32
3Loop è29
4çLoop
428
3
1 12Vac (from supplementary
transformer)
2 12Vac (from supplementary
transformer)
TECHNICAL MANUAL
CVM 2
C 5001 CV/01-99 IT
8
1.8 Power supply
The CVM 2 has a 230 Vac supply to terminals 49 and 50, phase and neutral respectively.
2Setup
2.1 Access to programming
Press the MENU key;
$The corresponding LED will light up and two fixed values will be displayed.
+Press the SET key;
$The parameter index (on the right-hand side of the display) will start flashing.
+Scroll through the parameter list using the “arrow up” and “arrow down” keys to visualise the required parameter.
+Press the SET key
$the value of the parameter (on the left-hand side of the display) will start flashing.
+Modify the value using the “arrow up” and “arrow down” keys.
+Press the SET key to confirm the operation.
+To access the FACTORY menu scroll through the list until parameter 92 appears, then enter the password.
+To exit, press the MENU key.
WARNING
To memorise the modifications and make them active you must turn off the power supply (using the main switch)
and, after a few seconds, turn it back on.
TECHNICAL MANUAL
CVM 2
C 5001 CV/04-99 GB
9
3Software
3.1 Description of user interface
If thePOWER LED is on, it means that the electronic control is supplied with power.
3.2 Unit startup
+Press the ON/OFF/RESET key.
$The inlet temperature value will be displayed on the screen.
+Press the MODE key.
•If the unit is a CHILLER:
$The COOLING LED comes on. The two COMPRESSOR 1and COMPRESSOR 2LED’s start flashing,
indicating the selection and stand-by condition required by the timer. Then they become steady, indicating operational
readiness, first of COMPRESSOR 1 and then of COMPRESSOR 2.
•If the unit is a HEAT PUMP:
$the HEATING LED comes on. The two COMPRESSOR 1and COMPRESSOR 2LED’s start flashing,
indicating the selection and stand-by condition required by the timer. Then they become steady, indicating operational
readiness, first of COMPRESSOR 1 and then of COMPRESSOR 2.
To modify the operating mode, press the MODE key; the unit will prepare for the change by shutting down the compressors
and then reactivating them in accordance with the procedure described above.
TECHNICAL MANUAL
CVM 2
C 5001 CV/01-99 IT
10
3.3 Unit shutdown
+Press the ON/OFF/RESET key.
$The display will go off.
3.4 ALARMS
There are two types of alarms: circuit/compressor and general alarms.
3.4.1 Circuit and/or compressor alarms
Visualisation of the circuit and compressor alarms.
The circuit and/or compressor alarms are visualised with the corresponding flashing code on the DISPLAY while the
ALARM LED comes on. The related compressor is simultaneously shut down.
Alarm reset:
+Press the ON/OFF/RESET key: the unit will be shut down.
3.4.2 General alarms
Visualisation of the general alarms
The general alarms are visualised with the corresponding flashing code on the DISPLAY while the ALARM LED comes on.
The compressors are simultaneously shut down.
Alarm reset:
+Press the ON/OFF/RESET key: the unit will be shut down.
Este manual sirve para los siguientes modelos
1
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