CLIVET G4D2GB-4 User manual

C. Art. M24D40G3-04 G4D2GB-4.doc
DIRECT EXPANSION
CLOSE CONTROL UNIT WITH
REMOTE CONDENSER
MR-DX 17-25-31-41-61-71-81
INSTALLATION,
OPERATION AND
MAINTENANCE MANUAL
GENERAL
THIS MANUAL CONTAINS THE FOLLOWING SECTIONS WHICH ARE TO BE CONSIDERED AN INTEGRAL PART
OF THE WHOLE AND ARE THEREFORE NOT TO BE DETACHED
G4D2GB-4
R4D2GB-4
E4D2GB-4
F4D2GB-4
C4D2GB-4
General Information
Reception
Electrical connections
Start-up
Controls
M4D2GB-4
L4D2GB-4
P4D2GB-4
N4D2GB-4
K4D2GB-4
Routine maintenance
Water connections
Refrigerant pipes
Air filters
Residual risks
IMPORTANT
The contents of this manual are designed to assure the
correct installation, adjustment and maintenance of the unit;
therefore:
- read the instructions with due care and attention;
- the appliance must be installed, tested and serviced by
properly qualified personnel (law n.45, 5.3.1990) licensed in
accordance with established legislation.
The manufacturer declines all liability, and guarantee
coverage is automatically waived, if electrical and/or
mechanical modifications are made to the unit. Tampering
and unauthorized repairs or modifications to the unit will
automatically void the guarantee.
Observe the safety regulations in force at the time of
installation.
Make sure that the characteristics of the mains network
conform to the data on the serial number plate inside the
electrical panel.
Conserve this manual and the circuit diagram with care.
Make sure that they are available for consultation by the
operator whenever necessary.
Packing materials (plastic wrappings, expanded polystyrene,
nails, etc.) are potentially hazardous and must be kept out of
reach of children. Recycle packing materials in accordance
with local bylaws.
The water chiller must be used only for the purpose for
which it is designed. The manufacturer bears no responsibility
in the case of applications other than the specified use.
Disconnect the unit in the case of breakdowns or
malfunctions.
If repairs are necessary use only Clivet-approved service
centres and always insist on original spare parts.
The use of non-original parts and/or unauthorized service
centres may result in unsafe operation of the unit.
The manufacturer declines all liability for direct or indirect damage to property or injury
to persons resulting from failure to adhere to the instructions in this manual.
ADDITIONAL SAFETY PRECAUTIONS
This unit has been especially designed and manufactured so to prevent any risk to persons and health hazard.
For this reason, design solutions fit to eliminate (where possible) any cause of risk and sensibly reduce the probability of
danger have been adopted.
Please refer to the Residual risks section of this manual and strictly observe the behaviour prescriptions listed there in
order to prevent any possible risk that hasn’t been possible to avoid in the design stage.

2
GENERAL SPECIFICATIONS
Sizes
17
25
31
41
61
71
81
Standard voltage
400/3/50
Cooling capacity (1) kW
5.8
8.3
9.4
12.5
17.0
19.1
23.2
Sensible capacity (1) kW
5.3
6.9
8.1
11.2
14.6
15.5
21.4
Compr.input power (1) kW
1.5
2.3
2.9
3.0
4.7
5.6
5.8
Compressor type
Scroll
N° of compressors
1
Total oil quantity kg
1.00
1.10
1.10
1.85
1.65
1.65
4
Handling zone
Frontal surface m2
0.36
0.44
0.64
0.78
N° of rows
3
4
Fin space mm
1.8
Coonections
Gas connection mm
16
18
Liquid connection mm
12
14
16
Condensate drain mm
22
Handling zone fans (Outlet)
N° of fans
1
2
Fan diametre mm
252
280
252
280
RPM rpm
600
1100
1300
1400
1300
1400
Standard air flow l/s
472
555
639
944
1150
1888
Single motor input kW
0.35
0.55
0.35
0.55
Max. ext. static press. Pa
50
Max. ext. static press. (2) Pa
100
150
200
190
200
190
200
Standard unit weight
Shipping weight (3) kg
166
170
218
265
275
295
Lenght mm
750
925
1250
1500
Depth mm
490
Height mm
1800
Sound levels
Sound Pressure Level (4)dB(A)
47
50
51
53
54
56
58
The data refers to the following conditions:
1) Ambient air 24°C BS/ 16,9°C BU
Relative humidity 50%
External air 35°C
Standard static pressure 50Pa
2) With standard ventilating section, upon request. Contact our sales office for further details.
3) Data refers to the version with outlet downwards.
4) Sound pressure level refers to 1 metre from the outside surface of the unit operating in an open field (version with outlet
downwards)

3
POSITIONING
The units are designed for indoor installation.
Make sure that the supporting surface is perfectly level and able to bear the full weight of the unit (see general
specifications).
Interpose a layer of rubber sheeting between the base of the unit and the supporting surface (to reduce noise and vibration).
Observe the specified functional clearances.
ACCESSORIES
The units can be fitted with the following accessories (upon request):
- Electric heating coil
Electric heating section made from reinforced aluminium
heaters with integral fins, 2 stage operation and safety
thermostat.
- Water heating coil
Extra heating coil with 3-way balancing control valve
supplied by external hot water.
- Hot gas post-heating
Used to maintain the desired room temperature in the
event of an increase in relative humidity, adding sensible
heat to the air which has already been cooled and
dehumidified.
Operation occurs by advantageously exploiting part of the
hot gas taken from the compressor discharge, conveying it
to a coil located downstream of the cooling section.
- Steam humidifier
Immersed electrode steam humidifier with electronic
controller featuring proportional control fitted with humidity
probe on the air intake and steam distributor.
- Differential pressure switch for dirty air filters
Differential pressure switch suitable for measuring a
pressure difference between the air intake and outlet in the
filter section. In the event where the differential pressure is
greater than the set value, a remote alarm is signalled.
- Soundproofing panels
The panels are lined on the inside with micro-perforated
metal plate for the maximum sound insulation.
- Serial communication module to PC or BMS
Serial connection kit for connecting the unit control module
to a centralised control system (PC or BMS).
- Phase monitor
Used to check the presence and the correct sequence of
the phases of the power supply.
- Flooding sensor
Floor water sensor to detect leaks from the water circuit,
with remote alarm.
- Adjustable support frame
Height adjustable support frame using painted telescopic
columns (RAL 7016).
Adjustment is possible from 300-500mm or from 500-
700mm.
- Adjustable support frame with duct
Height adjustable support frame using painted telescopic
columns (RAL 7016), fitted with aluminium deflector that
deviates the flow of air leaving the unit.
Adjustment is possible from 300-500mm or from 500-
700mm.
- Front outlet plenum
Plenum for front air discharge, outlets with double row of
painted "aluzink" adjustable fins (RAL7016).
- Outlet plenum on three sides
Plenum for air discharge from three sides, outlets with
double row of painted adjustable fins (RAL 7016).
- Clock
Programmable clock for automatic starts, set point
changes and time band settings.
- Condensate drain pump
The condensate drain pump is used to discharge the water
present in the pan to the outside, when the outside
discharge point is higher than the pan. The pump is
controlled automatically by a built-in level sensor.
- Isolating damper
The air outlet damper, controlled by an actuator with spring
return, isolates the unit when it is not in operation.
- EU5 air filter
Filter made up of a galvanised plate frame with galvanised
and electric-welded protective mesh, and regenerable
filtering media made from polyester fibre sized with
synthetic resins.
Efficiency F5 according to CEN-EN 779 standard
(classification EU5 according to Eurovent 4/5 –average
colorimetric efficiency between 40% and 60% ASHRAE
52-76 Atm). Self-extinguishing (resistance to flame class 1
- DIN 53438).
- Liquid line solenoid valve
Solenoid valve used to prevent the unwanted migration of
refrigerant during inactivity.

4
AIR INTAKE CONFIGURATIONS
1
2
Possible configurations: 1 = outlet downwards with intake from the front (M3 or D)
2 = outlet upwards with intake from the front (M5 or U)
WARNING: When positioning the unit, leave enough space at the front to inspect the air filters and all
the components subject to checks. To the side of the fittings leave enough space for
connections and checks.

5
AIR OUTLET DIMENSIONS
CBA
D E F
C BA B D
E F G
AABB
H
I
SEZ. B-B
61-71/81
SEZ. A-A
17-25-31/41
I = air outlet downwards
II = air outlet upwards
Sizes
Dimensions
A
B
C
D
E
F
G
H
I
17-25-31
170
300
280
195
255
40
---
630
260
41
260
335
330
173
285
32
---
805
260
61-71
140
305
335
165
200
250
40
1130
260
81
145
333
489
200
172
285
33
1370
260

6
REMOVAL OF THE PANELS
1
3
9
4
5
6
7
8
2
Legend:
1) outlet grill for the version with outlet upwards
2) to remove the side panels, unscrew the 4 inner screws
3) right side panel
4) service panel (can be drilled for connections)
5) service connection
6) inside bottom panel
7) outside bottom panel
8) outside top panel (single piece with the outside bottom panel for sizes 17-25-31-41)
9) left side panel

7
UNIT WITH ONE FAN, INSIDE VIEW (17-25-31-41)
1
23
4
5
6
10
11
9
8
13
14
18
19
20
22
23
15
12
17
16
7
21
Legend:
1) control panel
2) main isolator switch
3) LCD display
4) electrical panel
5) humidity probe (optional)
6) inlet air temperature probe
7) liquid gauge
8) heater section (optional)
9) hot water or hot gas coil (optional)
10) air filter (optional EU5)
11) evaporating coil
12) steam humidifier (optional)
13) flow differential pressure switch
14) filter differential pressure switch (optional)
15) liquid line solenoid valve (optional)
16) dewatering filter
17) bypass cock
18) hot water control valve
19) outlet fan
20) compressor
21) user terminal block (with Isolert3+ option)
22) outlet air temperature probe (optional)
23) power supply input and connections

8
UNIT WITH TWO FANS, INSIDE VIEW (61-71-81)
1
2
3
4
5
6
10
11
9
8
13
14
20
21
23
24
16
12
17
15
7
22
18
19
20
Legend:
1) control panel
2) main isolator switch
3) LCD display
4) electrical panel
5) humidity probe (optional)
6) inlet air temperature probe
7) liquid gauge
8) heater section (optional)
9) hot water or hot gas coil (optional)
10) air filter (optional EU5)
11) evaporating coil
12) steam humidifier (optional)
13) flow differential pressure switch
14) filter differential pressure switch (optional)
15) liquid line solenoid valve (optional)
16) dewatering filter
17) bypass cock
18) hot water control valve
19) outlet fan
20) compressor
21) user terminal block (with Isolert3+ option)
22) outlet air temperature probe (optional)
23) power supply input and connections
For details of the water and gas connections, see the corresponding sections Water connections and Refrigerant pipes.

9
OUTLET PLENUM (optional)
A
B
C
I = air outlet from the front
II = air outlet on 3 sides
Sizes
Dimensions A x B x C
17-25-31
750 x 490 x 450
41
925 x 490 x 450
61-71
1250 x 490 x450
81
1500 x 490 x450
The grills are double row (vertical - horizontal) and can be oriented as desired.

10
ASSEMBLY OF THE OUTLET PLENUM
2
1
Assembly phases:
1) unscrew the screws fastening the front grill
2) fasten the plenum to the unit at the points indicated in the figure, using the fastening screws supplied
3) replace the front grill

11
ADJUSTABLE SUPPORT FRAME (optional)
Available in two heights, 300-500 mm and 500-700 mm
I = exploded diagram * = with duct option
II = fastening the frame + = with 500-700 height option
Legend:
A) frame
B) rear duct support bracket
C) duct
D) front or rear bracket
E) adjustable leg
F) duct side bracket
G) side bracket
Assembly diagram
X) M6 screws on inserts
Y) Screw and bolt
Z) Self-tapping screw
A
*B *C
+D
+G
E
*F
x
x
y
z
z
z
T
e
l
a
i
o
*
S
q
u
a
d
r
e
t
t
a
p
o
s
t
e
r
i
o
r
e
p
o
r
t
a
s
c
o
o
p
*
S
c
o
o
p
+
S
q
u
a
d
r
e
t
t
a
a
n
t
.
p
o
s
t
.
+
S
q
u
a
d
r
e
t
t
a
l
a
t
e
r
a
l
e
G
a
m
b
a
r
e
g
o
l
a
b
i
l
e
*
S
q
u
a
d
r
e
t
t
a
l
a
t
e
r
a
l
e
s
c
o
o
p
V
i
t
i
M
6
s
u
i
n
s
e
r
t
i
V
i
t
i
M
6
s
u
i
n
s
e
r
t
i
V
i
t
e
b
u
l
l
o
n
e
A
u
t
o
f
o
r
a
n
t
i
A
u
t
o
f
o
r
a
n
t
i
F
I
S
S
A
G
G
I
T
E
L
A
I
O
E
S
P
L
O
S
O
G
R
A
N
D
E
Z
Z
E
D
I
M
E
N
S
I
O
N
I
1
7
-
2
5
-
3
1
4
1
6
1
-
7
1
8
1
7
0
0
x
4
9
0
x
H
8
7
5
x
4
9
0
x
H
1
2
0
0
x
4
9
0
x
H
1
4
5
0
x
4
9
0
x
H
H
=
3
0
0
@
5
0
0
S
T
A
N
D
A
R
D
5
0
0
@
7
0
0
O
P
T
I
O
N
A
L
*
c
o
n
o
p
z
i
o
n
e
s
c
o
o
p
+
c
o
n
o
p
z
i
o
n
e
H
=
5
0
0
@
7
0
0
A
u
t
o
f
o
r
a
n
t
i
SIZES
DIMENSIONS

CLIVET S.p.A. - Z. I. 32030 VILLAPAIERA - FELTRE (BL) Italy - Tel [phone] - Fax [phone] - sito web: www.clivet.com
The information presented in this manual is not binding and may be changed by the manufacturer without notice. All rights reserved.
DIMENSIONS
C
AB
Sizes
17
25
31
41
61
71
81
A
mm
750
750
750
925
1250
1250
1500
B
mm
490
490
490
490
490
490
490
C
mm
1800
1800
1800
1800
1800
1800
1800

R4D2GB-4.doc
DIRECT EXPANSION
CLOSE CONTROL UNIT WITH
REMOTE CONDENSER
MR-DX 17-25-31-41-61-71-81
RECEPTION
CONTENTS:
1.0 - INSPECTION UPON DELIVERY
2.0 - HANDLING
2.1 - HANDLING using a FORK LIFT TRUCK or SIMILAR
2.2 - HOISTING using a CRANE or SIMILAR
3.0 - STORAGE
4.0 - REMOVING THE PACKING
5.0 - POSITIONING
1.0 - INSPECTION UPON RECEIPT
The units are delivered in special protective packing.
When it arrives check the unit has not been damaged
during transport and that it has been supplied complete
with all the parts specified in the order. If there is any
visible damage make a note of it on the transport
document, accompanied by the words: “ ACCEPTED
WITH RESERVATIONS DUE TO OBVIOUS DAMAGE
TO PACKING ” since the delivery free at factory includes
cover for damage to be borne by the insurers in
compliance with Italian law N° 450 of 22.08.85 “limite di
risarcibilità”.
IMPORTANT
EVERY OPERATION DESCRIBED BELOW MUST BE CARRIED OUT IN COMPLIANCE WITH THE SAFETY
REGULATIONS IN FORCE CONCERNING BOTH THE EQUIPMENT USED AND THE OPERATING PROCEDURES
ADOPTED.
WARNING
ALWAYS MAKE SURE THE LIFTING CAPACITY OF THE EQUIPMENT USED IS SUITABLE FOR THE WEIGHT OF THE
UNIT IN QUESTION BEFORE CARRYING OUT ANY HANDLING OPERATIONS.
Unit weight table
Size
17
25
31
41
61
71
81
Downflow weight Kg
166
170
170
218
265
275
295
Upflow weight Kg
176
180
180
231
280
290
310
2.0 - HANDLING
2.1 - HANDLING using a FORK LIFT TRUCK or SIMILAR
2.1.1 - Insert the forks in the wooden platform supplied with the unit.
2.1.2 - Start lifting the unit, making sure that it is balanced and stable. Bear in mind that the heaviest part is where the
compressor is installed.

CLIVET S.p.A. - Z. I. 32030 VILLAPAIERA - FELTRE (BL) Italy - Tel [phone] - Fax [phone] –Web site http://www.clivet.com
The information presented in this manual is not binding and may be changed by the manufacturer without notice. All rights reserved.
2.2 - HOISTING using a CRANE or SIMILAR
2.2.1 - Insert the self-balancing fork in the long side of the
wooden base supplied with the unit.
2.2.2 - Place boards on the upper edges of the unit to
protect against damage.
2.2.3 - Gradually tension the lifting straps, checking that they
remain in position.
2.2.4 - Lift the unit, ensure that the unit is perfectly balanced
and stable. Bear in mind that the heaviest part is where
the compressor is installed.
WARNING
FOLLOWING THE ADVICE ON THE OUTSIDE OF THE CARDBOARD PACKING WILL ENSURE THE UNIT REMAINS IN
PERFECT CONDITION AND OPERATES CORRECTLY, TO THE BENEFIT OF THE END USER. THIS ADVICE IS AS
FOLLOWS :
- HANDLE WITH CARE
- KEEP DRY
- UNDER NO CIRCUMSTANCES EVER PLACE OTHER OBJECTS ON TOP OF THE UNIT
3.0 - STORAGE
- Store away from: direct sunlight, rain, sand and wind
- Temperature: maximum 60°C, minimum -10°C
- Maximum humidity: 90%
4.0 - REMOVING THE PACKING
4.1 - Remove the packaging, taking care to avoid damaging
the unit.
4.2 - Remove the brackets which hold the unit on the
wooden platform using a 10 mm spanner.
4.3 - Lift the unit off the platform.
4.4 - Lower the unit to the ground in the installation point
desired
4.5 - Check for any visible damage.
4.6 - Dispose of the packing so that it is taken to specialist
collection or recycling centres (respect the regulations in
force).
5.0 - POSITIONING
5.1 - Check that the area where the unit is to be located is
level and can support the weight involved.
5.2 - Prepare the holes in the floor, in the ceiling and in the
adjacent walls for all the service connections: air outlet,
refrigerant pipes, humidifier water supply, condensate
and humidifier drain, electrical cables.
When required, position the support frame, adjust the
height so that it corresponds to the raised floor, and
check that it is level.
5.3 - Make sure there is a suitable condensate discharge
near the site where the unit is installed. If gravity draining
is not possible, an electric condensate drain pump must
be installed.
5.4 - The doors and panels should be removed and
positioned in a safe place to prevent them from being
damaged during the various phases of installation.
5.5 –The MR units with outlet upwards have been designed
to discharge the air through an upper outlet with
adjustable louvers. If an outlet duct is required, this
should be fitted before all other connections to refrigerant
pipes or the electrical line.
All ducts fastened to the unit must be easily removable
so as to allow access to the unit from above.

E4D2GB-4.doc
DIRECT EXPANSION
CLOSE CONTROL UNIT WITH REMOTE
CONDENSER
MR-DX 17-25-31-41-61-71-81
ELECTRICAL CONNECTION
CONTENTS:
1.0 - ELECTRICAL PANEL
2.0 - MAINS POWER CONNECTION
3.0 - CONNECTIONS PERFORMED BY THE CUSTOMER
4.0 - CONNECTING A SERIES OF UNITS (OPTIONAL)
5.0 - SERIAL CONNECTION (OPTIONAL)
IMPORTANT
BEFORE PERFORMING ANY OPERATIONS ON THE ELECTRICAL SYSTEM, MAKE SURE THAT THE POWER
SUPPLY TO THE UNIT IS DISCONNECTED UPSTREAM.
N.B. REFER TO THE WIRING DIAGRAM ENCLOSED WITH THE UNIT, WHICH IS AN INTEGRAL PART OF THIS
MANUAL.
1.0 - ELECTRICAL PANEL
The electrical panel is located in the upper part at the front of the unit. To access the panel, use the triangular tool
supplied to open the two locks that secure the front panel, then lift the panel upwards, loosen the 2 screws that secure
the hinged door ¼ of a turn (these are accessible only after having removed the panel) and finally place the door-lock
isolator switch in the zero position, so as to disconnect power from the machine.
2.0 - MAINS POWER CONNECTION
The mains isolator switch QS1 is installed in the lower left of the electrical panel. The power supply cables must be
connected to the input of this switch. Also connect the earth wire to the corresponding yellow-green terminal to the side
of the isolator switch.
IMPORTANT: The power cables must be of a suitable type and cross-section, and sized according to the standards in
force, considering the power consumed by the unit. For this purpose, refer to the rating plate located inside the electrical
panel.
The “ELECTRICAL DATA” table below refers to the standard unit and does not consider any optional applications, such
as electric post-heating coils or electric steam humidifiers.
For the correct sizing of the power supply line, refer exclusively to the FLI and FLA data on the machine’s rating
plate, the only source of data that details any options included in the specific unit.

2
ELECTRICAL DATA
SIZE
MR-DX
17
25
31
41
61
71
81
F.L.A. (1)
Total (A)
6,82
8,83
9,67
13,42
17,33
20,15
26,1
Compressor C1
(A)
400/3/50
3,82
5,83
6,67
7,72
11,33
14,15
14,65
Outlet fans (A)
230/1/50
3
(N. 1 DDM
9/9)
3
(N. 1 DDM
9/9)
3
(N. 1 DDM
9/9)
5,7
(N. 1 DDM
10/10)
6
(N. 2 DDM
9/9)
6
(N. 2
DDM
9/9)
11,4
(N. 2 DDM
10/10)
L.R.A. (2)
Compressor C1
(A)
400/3/50
24
40
46
50
74
101
99
Outlet fans (A)
230/1/50
3,7
(N. 1 DDM
9/9)
3,7
(N. 1 DDM
9/9)
3,7
(N. 1 DDM
9/9)
7,6
(N. 1 DDM
10/10)
7,4
(N. 2 DDM
9/9)
7,4
(N. 2
DDM
9/9)
15,2
F.L.I. (3)
Total (kW)
2,57
3,73
4,29
5,25
7,28
8,62
9,5
Compressor C1
(kW)
400/3/50
2,22
3,38
3,94
4,7
6,58
7,92
8,4
Outlet fans (kW)
230/1/50
0,35
(N. 1 DDM
9/9)
0,35
(N. 1 DDM
9/9)
0,35
(N. 1 DDM
9/9)
0,55
(N. 1 DDM
10/10)
0,7
(N. 2 DDM
9/9)
0,7
(N. 2
DDM
9/9)
1,1
(N. 2 DDM
10/10)
M.I.C. (4)
28
44
50
58,7
81
108
112
1) F.L.A. Full Load Amperes (at maximum rated operating conditions)
2) L.R.A. Locked rotor amperes.
3) F.L.I. Full load input (at maximum rate operating conditions).
4) M.I.C. Maximum inrush of current. This value is not the arithmetic sum of the individual peak current values, but rather
considers the non-simultaneous starts between the compressors and the fans.
3.0 - CONNECTIONS PERFORMED BY THE CUSTOMER
As well as the power supply connection, the customer is also responsible for the following optional connections to be
performed.
For terminals refer to the unit wiring diagram.
Remote ON –OFF (to perform the connection, remove the jumper from terminals)
Remote condenser control and relative thermal cut-off device.
Exchanger free contact to use for the block optic signalling
Terminals 5, 6 : used to take a voltage of 230 Vac 2A, available only when the evaporating fans are operating.
Optional connection to the supervisory or teleassistance network
Anti-smoke detector and fire alarm contacts

3
Figure 1 –connections provided by the costumer –

4
Figure 2 –connection to the remote condenser –

5
4.0 - CONNECTING A SERIES OF UNITS (OPTIONAL)
This configuration allows the timed rotation of a unit defined as standby in a group with a maximum of 6 units.
If an alarm is activated on one of the units in operation, the unit in standby is started. This function is performed using a
digital input and output that from the “master” (unit 1) sends the command to activate and deactivate the unit in standby (the
command is updated every 10 minutes).
The diagram shows how all the panels may be the same, and only during installation does the connection need to be
performed, as shown in Figure 3, with a three-wire cable between one panel and the next.
During installation, attention must be paid to the following three points:
1. only one unit must be set as the master;
2. it is recommended to terminate the line with a 220 5W or 470 4W resistor (Rt) (Carel code 5729656AXX);
3. check that the G0 of the transformers are not earthed, so as to avoid unwanted current at G0.
Figure 3 –connection of a series of units –
Only one unit can be in stand-by, while the others are in operation. When the time t has elapsed (0-250 hours) the unit in
reserve is rotated, according to the progressive order of addresses. If one of the units in operation stops due to an alarm, the
machine in stand-by is automatically restarted. The alarm condition is detected after a delay of 30s.
If two units have the same address, they will be placed in stand-by at the same time. The unit with address 1 is the master,
and this uses impulses from the digital output Out7 to send the ON => STAND-BY command, and vice-versa, to the other
units.
The command is resent every 10 minutes for safety reasons.

CLIVET S.p.A. - Z. I. 32030 VILLAPAIERA - FELTRE (BL) Italy - Tel [phone] - Fax [phone] - sito web: www.clivet.com
The information presented in this manual is not binding and may be changed by the manufacturer without notice. All rights reserved.
6
5.0 - SERIAL CONNECTION (OPTIONAL)
To use the interface in an RS485 supervisor or telemaintenance
network, the optional “RS 485 card” must be purchased and the
procedure below completed:
- switch off the interface.
- on the user terminal block X2, connect the serial line, respecting the
polarity indicated and connecting the shield to the GND terminal.
- switch the interface on.
N.B. The serial line should be terminated with a 120ohm - 1/4W
resistor, placed between terminals Tx+ and Tx- on the terminal block
X2 at the opposite end of the network from the supervisor (Fig. 5).
The communication standard used by the electronics is the Carel
protocol, while the international BACnetTM and ModbusTM standards
can be used with the kits below.
PE4H0004: 485/232 serial converter for Carel protocol
PE4H0002: Carel/BACnetTM protocol conversion gateway
PE4H0003: Carel/ModbusTM protocol conversion gateway
The latter two do not require the serial converter.
Technical specifications of the RS485 serial card
Power supply voltage: from the interface by plug-in connector
Current input: 20mA
Storage conditions: -10-70°C, rH < 80% non-condensing
Operating conditions: 0-65°C, rH < 80% non-condensing
Card dimensions: 46x44 mm
Index of protection: IP00
Environmental pollution: normal
Temperature limits of the surfaces: as operating temp.
Classification according to protection against electric shock: to be
integrated in Class I or II devices
Category of resistance to heat and fire: D
PTI of the insulating materials: 250V
Serial output: three-way screw terminal connector for wires with a min.
cross-section of 0.2mm 2 and max. cross-section of 1.5mm 2
Standard: RS485 asynchronous, optically-isolated
Maximum speed: 19200 baud
Maximum number of devices: 200
Maximum distance from the supervisor: 1 km
Cable to be used: 1 twisted pair plus shield, AWG20/22, with capacitance
between the wires < 90pF/m
(example BELDEN cable 8761-8762)
Fig. 5