CLIMAVENETA CVM 3000 User manual

TECHNICAL MANUAL
CVM 3000
C 5030 CV/04-99 GB
1
Summary
1 CONNECTIONS..............................................................................................................................8
1.1 TEMPERATURE PROBES.............................................................................................................8
1.2 PRESSURE PROBES.......................................................................................................................9
1.3 LOW VOLTAGE DIGITAL INPUTS............................................................................................10
1.4 LIVE DIGITAL INPUTS..............................................................................................................11
1.5 RELAY OUTPUTS......................................................................................................................12
2 VOLTAGE/FREQUENCY INPUT ...............................................................................................13
3 POWER SUPPLY..........................................................................................................................14
4 SERIAL CONNECTIONS............................................................................................................14
5 DESCRIPTION OF USER INTERFACE....................................................................................17
5.1 UNIT STARTUP..........................................................................................................................17
5.2 UNIT SHUTDOWN.....................................................................................................................17
5.3 ENABLING A COMPRESSOR......................................................................................................17
5.4 DISABLING A COMPRESSOR.....................................................................................................18
5.5 MEANING OF COMPRESSOR STATUS LED'S (A2)..................................................................18
5.6 READING THE OPERATINGCONDITIONS..............................................................................19
5.7 TEMPERATURE DISPLAY.........................................................................................................20
5.7.1 Version C (Chiller)................................................................................................................20
5.7.2 Versions R/N/Q Chiller with recovery; Heat pumps; Multipurpose units .............................20
5.7.3 Version FC (Chiller with free-cooling)..................................................................................21
5.8 OPERATING MODE SELECTION..............................................................................................22
5.8.1 Version R...............................................................................................................................22
5.8.2 Version N...............................................................................................................................22
5.8.3 Version FC.............................................................................................................................22
5.8.4 Version Q...............................................................................................................................23
5.9 SIGNALS......................................................................................................................................23
5.10 ALARMS.................................................................................................................................24
5.10.1 Circuit and/or compressor alarms......................................................................................24
5.10.2 General alarms....................................................................................................................25
5.11 FLASHING LED'S....................................................................................................................26
6 ALARM SIGNALS........................................................................................................................27
7 REGULATION................................................................................................................................30
7.1 CHILLED WATER REGULATION.............................................................................................30
7.1.1 Default set point settings........................................................................................................31
7.2 HOT WATER REGULATION.....................................................................................................32
7.2.1 Default set point settings........................................................................................................33
7.3 FREE-COOLING REGULATION (ONLY FC VERSION):............................................................34
7.3.1 Default set point settings........................................................................................................34

TECHNICAL MANUAL
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C 5030 CV/04-99 GB
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8 ENABLE PRINTING.....................................................................................................................35
8.1 PARAMETER PRINTING............................................................................................................35
8.2 COMPRESSOR VARIABLES AND STATUS PRINTING..............................................................35
8.3 ALARM HISTORY PRINTING....................................................................................................36
8.4 LAMP TEST ................................................................................................................................37
8.5 PRINTER CHARACTERISTICS FOR CONNECTION TOCVM 3000........................................38
9 HOUR BAND PROGRAMMING................................................................................................39
9.1 KEYS............................................................................................................................................39
9.2 LED'S............................................................................................................................................39
9.3 THE DISPLAY DURING PROGRAMMING.................................................................................39
9.4 HOUR BAND EXECUTION.........................................................................................................40
10 UPGRADING EPROM................................................................................................................41
11 SELF-CALIBRATION................................................................................................................43
12 ACCESS TO THE PROGRAMMING MENU.........................................................................44
13 PARAMETERS............................................................................................................................45
13.1 PARAMETER LIST FOR UNITS WITH SCREW COMPRESSORS
(PARAMETER 17=2).............................................................................................................56
14 ENCLOSURES.............................................................................................................................57

TECHNICAL MANUAL
CVM 3000
C 5030 CV/04-99 GB
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Board description
The system consists of a main board and keyboard. An expansion board (slave) may also
be present, depending on the type of unit. The keyboard may be one of two types:
•Keyboard for units with 1 to 4 compressors;
•Keyboard for units with over 4 compressors.
The main board communicates with the keyboard through a serial current-loop and with
the expansion board through a RS485 serial port.
A board (logic board) with the microprocessor used to control all the electronic system is
mounted on the main board. The electronic system management program is memorised in
the EPROM. Parameters, adjustments and history data of the various unit models
managed by this controller are memorised in the EEPROM. The parameters are set
through the keyboard.
Figure 1-0 ELECTRONIC SYSTEM
MAIN
BOARD

TECHNICAL MANUAL
CVM 3000
C 5030 CV/04-99 GB
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Figure 1-1 MAIN BOARD
TRIMMER
112
113
114
94
95
96b
96
97
98
98
99
100
101
102
101b
102b
98
105b
106b 107b 108b 109b 110b 111b
103 104
1b 2b 3b 4b 5b 6b 7b 8b 9b
10b 11b 12b 13b 14b 15b 16b 17b 18b 19b 20b 21b 22b 23b 24b 25b 26b 27b 28b 29b 30b 31b 32b
33 34 35 36 37 38
105 106 107 108 109 110 111
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
57
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
40
39
93 92 91 90 89 88 87 86 85 84 83 82 81 80 79 78 77 76 75 74 73 72 71 70 69 68 67 66 65 64 63 62 61 60 59 58
CLOCK BOARD

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Figure 1-2 MAIN BOARD DETAIL

TECHNICAL MANUAL
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C 5030 CV/04-99 GB
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Figure 1-3 EXPANSION MODULE
Notes for proper installation:
1Remove the jumpers shown in:
Figure 1-2 MAIN BOARD DETAIL;
Figure 1-3 EXPANSION MODULE
2Set all the dip switches to ON;
Figure 1-3 EXPANSION MODULE
129 128 127 126 125 124 123 122 121 120 119 118 117 116 115 177 176 175 174
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
152 153 154
15
5
156 157
158 159 160 161 162
178 179
179b
181
180
183
182
173
172
171
170
169
168
167
166
165
164
163

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Meaning of the LED’s:
APower supply to the terminals (logic board power supply): terminals 105-
106
BCOM 2 serial port Rx signal:
expansion module<->main board (terminals 101bis/102bis/98)
CCOM 2 serial port Tx signal, alternately for:
logic<->main board
expansion module<->main board (terminals 101bis/102bis/98)
DCOM 3 serial port Rx signal:
(terminals 98/99/100)
ECOM 3 serial port DTR signal
FCOM 3 serial port Tx signal
(terminals 98/99/100)
GSupply to terminals (main board power supply): 94-95
HCOM 4 serial port Rx signal
(terminals 96/97/98/96bis)
ICOM 4 serial port DTR signal
(terminals 96/97/98/96bis)
LCOM 4 serial port Tx signal
(terminals 96/97/98/96bis)
OCOM 2 serial port Rx signal
expansion module <-> main board (terminals 178/179/179 bis)
PCOM 2 serial port Tx signal
expansion module <-> main board (terminals 178/179/179 bis)
RSupply to terminals (serials): 180-181
SSupply to terminals (relays): 182-183

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C 5030 CV/04-99 GB
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1Connections
1.1 Temperature probes
The 16 PTC-type temperature probes have a different meaning depending on the software
configuration given to the machine’s configuration parameters.
Terminals 1 to 16: temperature probe inlets.
Terminals 1-bis to 16-bis: temperature probe references.
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 the microprocessor’s terminals;
•using a digital Ohmmeter, measure the probe’s resistance value;
•measure the temperature near the probe cap;
•compare the measured resistance value with the one shown in the table: the
corresponding temperature should be approximately the same as the measured one.

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1.2 Pressure probes
The 16 4-2 mA type pressure transducers have a different meaning depending on the
software configuration given to the machine’s configuration parameters.
Number 16 pressure probes 4-20 mA 0-30 bar.
Terminals 17 to 32: signal inputs 4-20 mA.
Terminals 17-bis to 32-bis probe power supply 12 Vdc.
STANDARD UNITS AND
HEAT PUMPS WITH
TOTAL RECOVERY
UNITS WITH SCREW
COMPRESSORS
Terminals 17 18 19 20 High pressure per circuit High pressure per circuit
Terminals 21-22-23-24 High pressure per circuit High pressure per circuit
Terminals 25 26 27 28 29 30 31
32 Compressor oil pressures Low pressure per circuit
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
Transducer checking procedure:
•disable the compressors and leave the unit with only the “ON/OFF switch” ON;
•disconnect the cable from the “bis” terminal;
•place a tester between the “bis” terminal and the disconnected cable and read the
current value using a milliammeter (20mA bottom of scale);
•read the pressure with a gauge placed near the pressure transducer;
•compare the readings with the values shown in the table.

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C 5030 CV/04-99 GB
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1.3 Low voltage digital inputs
The inputs described below (BT) are low voltage inputs and must consist of voltage-free
contacts.
STANDARD UNITS AND
HEAT PUMPS WITH TOTAL
RECOVERY
UNITS WITH SCREW
COMPRESSORS
Terminal 33 Common to all low voltage inputs Common to all low voltage inputs
Terminals 34 35 36 37 Fan thermal protection signal
contact for circuit (closed contact =
correct operation)
Fan thermal protection signal contact
for circuit pair (closed contact =
correct operation)
Terminal 38 Unit remote ON/OFF (closed
contact = unit on) Unit remote ON/OFF (closed contact = unit on)
Using the REMOTE ON/OFF control:
For proper use of the unit’s remote on/off control, the following delay time must be set
between the unit’s on/off control and the water pump control:
Pump control
Remote ON/OFF
This is very important, because during the pump-down procedure (at compressor stop)
the water pump must be on in order to carry it out correctly, otherwise if the flow switch
intervenes, this could cause damage to the compressors. In this case Climaveneta will not
cover warranty.
Moreover, if the remote ON/OFF control is used (from an external contact or through
protocol control) the following minimum time delays must be observed:
ON/OFF control
Electrical panel connection of the remote ON/OFF contact:
Remote ON/OFF contact
MINIMUM 60”
MINIMUM 360”
ON
OFF
MIN. 60” MIN. 60”
EF
ON
OFF ON
OFF

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C 5030 CV/04-99 GB
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1.4 Live digital inputs
39 Reference signal for all live inputs, where the neutral conductor must be
connected (N). The signal contacts must interrupt the other phase (R) and, if the contact
is closed, they must let the phase (R) reach the terminal of the corresponding contact.
40 41 42 43 44 45 46 47 Compressor maximum safety high pressure switch signal
input;
48 49 50 51 52 53 54 55 Compressor thermal overload protection signal input;
56 Primary circuit flow switch signal input;
57 Secondary circuit flow switch signal input.
(*)A flow switch at the evaporator’s outlet is mandatory to avoid the invalidation of the
warranty.
Connection to the electrical panel:
Flow switch contact
Pump contact
AB
CD

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1.5 Relay outputs
Main board:
RELAY N.A. N.C. COM.
RL1 Cumulative alarm 114 112 113
RL2 Primary circuit antifreeze 93 92
RL3 Secondary circuit antifreeze 91 90
RL4
RL5 88 87 89
RL6
RL7 85 84 86
RL8
RL9 82 81 83
RL10
RL1179 78 80
RL12
RL13 76 75 77
RL14
RL15 73 72 74
RL16
RL17 70 69 71
RL18
RL19 67 66 68
RL20
RL21
RL22
RL23
RL24
RL25
64
63
62
61
60
59
65
58
Expansion board:
RELAY N.A. COM.
RL26 130 132
RL27 131 136
RL28 133 144
RL29 134 148
RL30 135
RL31 137
RL32 138
RL33 139
RL34 140
RL35 141
RL36 142
RL37 143
RL38 145
RL38 146
RL40 147
RL41 149
RL42 150
RL43 151

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RELAY N.A. COM.
RL44 152 155
RL45 153 162
RL46 154
RL47 156
RL48 157
RL49 158
RL50 159
RL51 160
RL52 161
RL53 163 167
RL54 164
RL55 165
RL56 166
RL57 168
RL58 169
RL59 170
RL60 171
RL61 172
RL62 173
RL63 174 177
RL64 175
RL65 176
2Voltage/frequency input
The main board has an input for monitoring the voltage and frequency value.
103 -104 Input for voltage to be monitored (range 0 -260 Vac).
Verification of the voltage value read by the board:
•read the voltage to terminals 103 and 104 using a tester:
•visualise the value of parameter 93.
If the two values do not correspond, make the necessary calibration using the trimmer
shown in Figure 1-1 MAIN BOARD.
N.B.: the value of parameter 93, indicated on display B5, is not updated dynamically.
Update the displayed value using the B6 keys.

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C 5030 CV/04-99 GB
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3Power supply
Board power supply:
94 -95 12 Vac board power supply
182 -183 Expansion (if installed)
105 -106 12 Vac. isolated power supply
Keyboard power supply:
1 -2 12 Vac. isolated power supply
3 -4 12 Vac. isolated power supply
180 -181 Expansion (if installed)
4Serial connections
COM1: 0-20mA half duplex serial interface for connection with the display board.
MAIN BOARD KEYBOARD
102 Input + 5
101 Output -6
COM2: 0-20mA half duplex serial interface for connection between logic and main
board. With a suitable circuit the current loop is also converted into an RS 485 serial port
for communication to the expansion modules:
MAIN BOARD EXPANSION BOARD
101 bis 178
102 bis 179
98 179 bis
80VA
TRANSFORMER
code: C5110791
25VA
TRANSFORMER
code: C5110780
230 Vac
230 Vac
Neutral
Neutral

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Note: the expansion dip-switches must all be set to ON (Figure 1-3 EXPANSION
MODULE, point N).
COM3: half duplex RS485 serial interface for connection to printer, supervision systems,
Interface, Master:
99 RS485 +
100 RS485 -
98 reference
The cable used for the connections must be shielded and must have at least 1 sq. mm
wires for distances of less than 300 meters and 1.5 sq. mm wires for longer distances. The
maximum distance of the cable that connects the CVM Master, the Interface, the
supervision software to the farthest unit must not exceed 1000 meters. As shown in the
figure, the single shield sections must be connected to each other but not to the terminal
boards:
SHIELD
NB : maximum number of connected units = 8
NB: as indicated in the figure, a SINGLE serial cable must leave the CVM Master, the
Interface, or the Supervision software to connect the first unit, then proceed to connect
the other units successively.
+
Unit 2 +
-
G
Unit 3 +
-
G
-
G
Unit 1
INTERFACE (1)
MASTER (2)
SUPERVISION (3)
CVM3000
+ = terminal 99
-= terminal 100
G = terminal 98

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C 5030 CV/04-99 GB
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COM4:RS485 half duplex serial interface with DTR for remote connection by modem:
96 bis DTR
96 RS485 +
97 RS485 -
98 reference
(1) Refer to manual for description and use.
(2) Refer to manual for description and use.
(3) Refer to manual for description and use.

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C 5030 CV/04-99 GB
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Software
5Description of user interface
The CVM_3000 keyboards are shown in figures 1, 2, 3, 4, 5, 6 of the enclosures,
respectively:
Fig. 1: CVM_3000 C Chiller version
Fig. 2: CVM_3000 R Chiller with heat recovery version
Fig. 3: CVM_3000 N Heat Pump version
Fig. 4: CVM_3000 FC Free-Cooling version
Fig. 5: CVM_3000 Q Multipurpose Unit version
Fig. 6: CVM_3000 NR Heat Pump with heat recovery version
If the (C1) POWER LED is on, it means that the electronic control is supplied with
power.
Before you switch on the unit, make sure that it has been supplied with power for
at least 8 hours (in order to enable the heating of the oil and to avoid presence of
refrigerant gas inside the compressor oil pan).
When the power supply is connected, the controller carries out a 10 second lamp
test automatically.
5.1 Unit start-up
+Press the T1 key:
The LED on the key will light up.
5.2 Unit shutdown
+Press the T1 key:
The LED on the key will go off.
5.3 Enabling a compressor
+Press the A1key corresponding to the compressor to be enabled;
The LED on the key will light up.

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The start-up of the enabled compressor may be delayed due to:
•the delays set in the parameters
•the water inlet temperature is under the cold water set point
•alarm.
5.4 Disabling a compressor
+Press the A1key corresponding to the compressor to be disabled;
The LED on the key will go off.
Use this function only for emergency stops, since the pump-down procedure is not
carried out and the compressor may suffer damage not covered by the warranty.
5.5 Meaning of the compressor status LED’s (A2)
LED REQUEST LED OPERATION
Off Off Compressor off
On Off Compressor requested but delayed
On On Compressor operating
Off On Shutdown with pump down procedure

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5.6 Reading the operating conditions
+Using the B3 key, select the compressor for which you wish to visualise the
information (the number will appear on the B2 display and the
corresponding LED on the A1key will simultaneously start flashing);
$the condensing pressure appears on the B4 display;
$other values may be visualised on the B5 display, selected through the B6
“arrow down” key.The values that may be visualised are:
$low pressure (default);
$compressor differential oil pressure;
$discharge temperature;
$compressor operating hours;
$air temperature near condenser coil fins (only on N and Q versions;
in this case all the LED’s on the left of the B5 display will flash).
The LED on the side of the display (B5) lights up to indicate which value is
visualised; simultaneously, one of the LED’s below the display indicates the unit of
measurement.

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5.7 Temperature display
5.7.1 Version C (Chiller)
Evaporator inlet temperature:
+press the T4 key. The LED on the key will light up;
$read the value on the C2 display.
Evaporator outlet temperature:
+press the T5 key. The LED on the key will light up;
$read the value on the C2 display.
5.7.2 R/N/Q versions: Chiller with recovery; Heat Pumps; Multipurpose Units
Evaporator inlet temperature:
+press the T4 key (CHILLED WATER). The LED on the key will light up;
$read the value on the C2 display.
Evaporator outlet temperature:
+press the T5 key (CHILLED WATER). The LED on the key will light up;
$read the value on the C2 display.
Condenser inlet temperature:
+press the T4 key (HOT WATER). The LED on the key will light up;
$read the value on the C2 display.
Condenser outlet temperature:
+press the T5 key (HOT WATER). The LED on the key will light up;
$read the value on the C2 display.