Carel MCmultizone User manual

Integrated Control Solutions & Energy Savings
MCmultizone
atomising humidiers
User manual

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“MCmultizone” +030221981 - rel. 2.3 - 09.12.2014
WARNINGS
CAREL S.p.A. humidifiers are advanced products, whose operation is specified
in the technical documentation supplied with the product or can be
downloaded, even prior to purchase, from the website www.carel.com. Each
CAREL S.p.A. product, in relation to its advanced level of technology, requires
setup/configuration/programming/commissioning to be able to operate in
the best possible way for the specific application. The failure to complete such
operations, which are required/indicated in the user manual, may cause the
final product to malfunction; CAREL S.p.A. accepts no liability in such cases.
The customer (manufacturer, developer or installer of the final equipment)
accepts all liability and risk relating to the configuration of the product in
order to reach the expected results in relation to the specific final installation
and/or equipment. CAREL S.p.A. may, based on prior agreements, act as a
consultant for the installation/commissioning/use of the unit, however in no
case does it accept liability for the correct operation of the humidifier and the
final installation if the warnings or suggestions provided in this manual or in
other product technical documents are not heeded. In addition to observing
the above warnings and suggestions, the following warnings must be heeded
for the correct use of the product:
• DANGER OF ELECTRIC SHOCK
The humidifier contains live electrical components. Disconnect the mains
power supply before accessing inside parts or during maintenance and
installation.
• DANGER OF WATER LEAKS
The humidifier automatically and constantly fills/drains certain quantities of
water. Malfunctions in the connections or in the humidifier may cause leaks.
Important
Important:
• The installation of the product must include an earth connection, using the
special yellow-green terminal available in the humidifier.
• The environmental and power supply conditions must conform to the
values specified on the product rating labels.
• The product is designed exclusively to humidify rooms either directly or
through distribution systems (ducts, atomising racks).
• Only qualified personnel who are aware of the necessary precautions and
able to perform the required operations correctly may install, operate or
carry out technical service on the product.
• For the production of atomised water, only use water with the characteristics
specified in this manual. Important, demineralised drinking water must be
used (as specified in the manual). In addition, the particles of water that are
not absorbed by the air must be removed using the droplet collection tank
(in the humidification section) and the droplet separator (at the end of the
humidification section).
• All operations on the product must be carried out according to the
instructions provided in this manual and on the labels applied to the
product. Any uses or modifications that are not authorised by the
manufacturer are considered improper. CAREL S.p.A. declines all liability for
any such unauthorised use.
• Do not attempt to open the humidifier in ways other than those specified
in the manual.
• Observe the standards in force in the place where the humidifier is
installed.
• Keep the humidifier out of the reach of children and animals.
• Do not install and use the product near objects that may be damaged when
in contact with water (or condensate). CAREL S.p.A. declines all liability for
direct or indirect damage following water leaks from the humidifier.
• Do not use corrosive chemicals, solvents or aggressive detergents to clean
the inside and outside parts of the humidifier, unless specifically indicated
in the user manual.
• Do not drop, hit or shake the humidifier, as the inside parts and the linings
may be irreparably damaged.
CAREL S.p.A. adopts a policy of continual development. Consequently, CAREL
reserves the right to make changes and improvements to any product
described in this document without prior warning.The technical specifications
shown in the manual may be changed without prior warning.
The liability of CAREL S.p.A. in relation to its products is specified in the
CAREL S.p.A. general contract conditions, available on the website www.
carel.com and/or by specific agreements with customers; specifically to the
extent where allowed by applicable legislation, in no case will CAREL S.p.A.,
its employees or subsidiaries be liable for any lost earnings or sales, losses
of data and information, costs of replacement goods or services, damage to
things or people, downtime or any direct, indirect, incidental, actual, punitive,
exemplary, special or consequential damage of any kind whatsoever, whether
contractual, extra-contractual or due to negligence, or any other liabilities
deriving from the installation, use or impossibility to use the product, even if
CAREL S.p.A. or its subsidiaries are warned of the possibility of such damage.
DISPOSAL
The humidifier is made up of metal parts and plastic parts. In reference to
European Union directive 2002/96/EC issued on 27 January 2003 and the
related national legislation, please note that:
1. WEEE cannot be disposed of as municipal waste and such waste must be
collected and disposed of separately;
2. the public or private waste collection systems defined by local legislation
must be used. In addition, the equipment can be returned to the distributor
at the end of its working life when buying new equipment;
3. the equipment may contain hazardous substances: the improper use or
incorrect disposal of such may have negative effects on human health and
on the environment;
4. the symbol (crossed-out wheeled bin) shown on the product or on the
packaging and on the instruction sheet indicates that the equipment has
been introduced onto the market after 13 August 2005 and that it must
be disposed of separately;
5. in the event of illegal disposal of electrical and electronic waste, the
penalties are specified by local waste disposal legislation.
Warranty on materials: 2 years (from the date of production, excluding
consumables).
Approval: the quality and safety of CAREL S.P.A. products are guaranteed by
the ISO 9001 certified design and production system, as well as by the
mark..

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“MCmultizone” +030221981 - rel. 2.3 - 09.12.2014
Content
6.6 Scheduled set points......................................................................................23
7. INSTALLER MENU 24
7.1 Type of control....................................................................................................24
7.2 Probe configuration.........................................................................................24
7.3 Operating options ...........................................................................................24
7.4 Special functions ...............................................................................................24
7.5 Supervisor..............................................................................................................25
7.6 External alarms....................................................................................................25
7.7 pLAN configuration.........................................................................................25
8. MAINTENANCE MENU 26
8.1 Reset configurations .......................................................................................26
8.2 System information (read only)................................................................26
8.3 Manual procedure............................................................................................26
8.4 Hour counter........................................................................................................26
8.5 Alarm log................................................................................................................26
9. TABLE OF ALARMS 27
10. ADVANCED FUNCTIONS 28
10.1 Wiring diagrams..............................................................................................28
10.2 Operating principle.......................................................................................32
10.3 Control principles...........................................................................................32
10.4 Pressure control...............................................................................................34
10.5 Drain/fill...............................................................................................................34
10.6 Periodical washing of the water line.................................................34
10.7 Automatic cleaning of the atomising heads.................................34
10.8 Pressure overboots........................................................................................34
11. GENERAL CHARACTERISTICS OF THE
DISTRIBUTION SYSTEM 36
11.1 Atomising head...............................................................................................36
11.2 Assembly kit.......................................................................................................36
12. DESIGNING A SYSTEM 37
12.1 Sizing an MC system.....................................................................................37
12.2 Sizing the compressor.................................................................................37
12.3 Sizing air/water lines between cabinet & distribution
system..............................................................................................................................37
13. INSTRUCTIONS FOR INSTALLATION IN ROOMS 39
13.1 Tips for correct installation .......................................................................39
13.2 Assembling the atomising head...........................................................39
13.3 Positioning the humidity probes..........................................................39
13.4 Important rules to be followed .............................................................39
14. INSTRUCTIONS FOR INSTALLATION IN DUCTS 41
14.1 Positioning the atomisation manifold...............................................41
14.2 Important rules to be followed .............................................................42
14.3 Positioning the humidity probes..........................................................42
14.4 Manifolds for installation in ducts........................................................42
15. MAIN ADJUSTMENTS 43
1. INTRODUCTION AND ASSEMBLY 7
1.1 MCmultizone atomising humidifier .........................................................7
1.2 Models ........................................................................................................................7
1.3 Dimensions and weights ...............................................................................7
1.4 Components ..........................................................................................................8
1.5 Electrical specifications.....................................................................................8
1.6 Opening the packaging ..................................................................................8
1.7 Positioning the cabinet....................................................................................8
1.8 Wall mounting........................................................................................................8
1.9 Opening the cabinet door .............................................................................9
1.10 Components and accessories ..................................................................9
2. WATER AND AIR CONNECTIONS 10
2.1 Characteristics of the water line...............................................................11
2.2 Type of supply water ......................................................................................11
2.3 Characteristics of the air line......................................................................11
2.4 Type of compressed air..................................................................................11
2.5 Type of water and air lines...........................................................................11
2.6 Water and air line accessories....................................................................11
3. ELECTRICAL CONNECTIONS 12
3.1 Power supply .......................................................................................................13
3.2 Remote ON/OFF (ID & COM)......................................................................13
3.3 Modulating control signal (J24 & J2).....................................................13
3.4 Control signals from ext. voltage-free contact i.e. ON/OFF
humidistat (ID & COM)...........................................................................................14
3.5 Control signals from air line pressure transducer (J2) ................15
3.6 Connection of NO drain solenoid valve at end of water line
(group of ID terminals)...........................................................................................15
3.7 External utility control (J13)........................................................................15
3.8 Cumulative alarm relay (J14)......................................................................15
3.9 Alarm inputs from external devices.......................................................16
3.11 Enable wash water line on external signal.....................................16
3.12 Supervisor network.......................................................................................16
3.13 Proportional 0 to 10 Vdc output ...........................................................16
4. MASTER/SLAVE APPLICATIONS 17
4.1 Applications for one large space or AHU (single point)............17
4.2 Applications for multiple spaces or AHUs (multizone) .............17
4.3 Setting the serial address for units with multiple slaves...........17
4.4 pLAN network connection (J11)..............................................................18
5. STARTING AND USER INTERFACE 19
5.1 Starting ....................................................................................................................19
5.2 Stopping.................................................................................................................19
5.3 First start-up (setting the language)......................................................19
5.4 Keypad ...................................................................................................................19
5.5 “Main” screen.........................................................................................................19
5.6 “INFO” screens (read-only)............................................................................20
5.7 “SET” screen ...........................................................................................................20
5.8 “pLAN” screen .......................................................................................................20
5.9 Main menu ...........................................................................................................21
6. USER MENU 22
6.1 Alarm thresholds ...............................................................................................22
6.2 Clock ........................................................................................................................22
6.3 Enable scheduler...............................................................................................22
6.4 Set scheduler .......................................................................................................22
6.5 Weekly scheduler ..............................................................................................22

16. MAINTENANCE 44
16.1 Maintenance procedures..........................................................................44
16.2 Kits & optional accessories for the air/water line (see chap. 2)........44
16.3 Kits & optional accessories for the atomising heads
(see chap. 11)...............................................................................................................44
16.4 Spare parts for air/water line (see paragraph 1.4)......................45
16.5 Pre-programmed pCO3controllers .....................................................46
16.6 Electrical panel kit and spare parts (see paragraph 1.4).........46
17. TROUBLESHOOTING 47
17.1 Troubleshooting table.................................................................................47

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1. INTRODUCTION AND ASSEMBLY
1.1 MCmultizone atomising humidier
Humidification system designed for medium/large installations, where are
a large humidification capacity is required with low energy consumption
(high water flow without excessive energy costs).
Water and air, suitably regulated in terms of flow-rate and pressure, are
delivered to the atomising nozzles in two separate lines. Due to the
special shape of the nozzles, the jet of water is nebulised into a mist of
very fine droplets (5 to 8 microns).
The atomised water can then easily change state and vaporise. The
energy required for this transformation is supplied by the ambient air.
For each litre/hour of water that vaporises, in fact, the environment
gives up around 590 kcal (149 SkJ) of energy. Consequently, there is a
decrease in temperature in the environment being humidified, and this
process may be useful in many applications (adiabatic cooling). A timed
automatic system ensures the atomising nozzles are cleaned periodically,
preventing debris or scale from causing malfunctions.
Each atomising head is fitted with a small piston for cleaning any deposits,
whenever the control cabinet stops operating. The system guarantees
optimal atomisation at all times and prevents dripping when the
installation is off. The electronic controller ensures the ambient humidity
is kept at the required value, showing the relative humidity read in the
room on the display.
The MCmultizone system is essentially made up of: control cabinet and
compressed air-water supply, atomising nozzles, nozzle assembly kit.
1.2 Models
The MCmultizone humidifiers are available by:
• size: with maximum flow-rate of 60 l/h (MC060*), or 230 l/h (MC
models230*);
• type of capacity modulation: ON/OFF (MC models***C*), or
proportional (MC models***H*);
• power supply: single-phase 230 Vac 50 Hz (MC models****D*), or 110
Vac 60 Hz (MC models****1*);
• version: Master (MC models*****M*), or Slave (MC models*****S*);
• type of water used: mains, drinking (MC models*********0), or
demineralised/aggressive (MC models*********1).
Models recommended for specic applications:
• for duct applications (or air handling units), proportional units with
high humidity limit probe are recommended.
• for applications directly in the room, both ON/OFF and proportional
control units are recommended
1.3 Dimensions and weights
Front view
500 28
580
Air Inlet
Water Inlet
Air Outlet
Water Outlet
Water Drain
Electric Intlet
Electric Intlet
Electric Intlet
224
detail of the cabinet, side view,
water and air inlet
detail of the cabinet, side view,
outlet (to nozzles)
150 8
303030
40110
101
4182
50100
150
123
224
123 101
50
224
Packaging dimensions:
• height (H): 770 mm (30.14 inch);
• width (W) 605 mm (23.82 inch);
• depth (D) 255 mm (10.00 inch).
Packaged humidier weight:
• models MC**H(D,1)*0*: 21 kg (46.3 lb);
• models MC**C(D,1)*0*: 20.5 kg (45.2 lb).
Installed humidier weight:
• models MC**H(D,1)*0*: 19.5 kg (43 lb);
• models MC**C(D,1)*0*: 19 kg (42 lb).
Mechanical specications:
• Installation: wall mounting;
• IP40;
• cabinet operating conditions: 1 to 40 °C (34 to 104 °F) <80 % rH non-
condensing;
• storage conditions: 1 to 50 °C (34 to 122 °F) <80 % rH non-
condensing.

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1.4 Components
16
1 3
5
42
11 12 13 14 15
10
86 79
Key:
1. Electronic controller
2. Terminal (Master version only)
3. Transformer (CAREL code MCKTR00000)
4. Modulating valve regulator (modulating version only, CAREL code
MCKARVA000)
5. Terminal block (fuse kit MCKFUSE000)
6. Air inlet pressure gauge
7. Air pressure regulator/regulator
8. NC air solenoid valve
9. Air line pressure switch (ON/OFF versions only)
10. Air outlet pressure gauge
11. Water inlet pressure gauge
12. Water pressure regulator
13. NC water solenoid valve
14. Water outlet pressure gauge
15. NO water drain solenoid valve
16. Power supply 110/230 Vac 12 Vdc 0.5 A (modulating version only,
CAREL code MCKAL00000)
1.5 Electrical specications
Models MC****D*** (230 V 50 Hz) (1)
MC***CD*00 MC***CD*01 MC***HD*00 MC***HD*01
Vac
phases
Hz
230 V
1
50/60 Hz
230 V
1
50 Hz
230 V
1
50/60 Hz
230 V
1
50 Hz
Power 37 W 44 W 41 W 48 W
Current 0.26 A 0.29 A 0.30 A 0.33 A
(1) Product in compliance with EN55014, EN61000, EN60335
Models MC****1*** (110 V 60 Hz) (1)
MC***C1*00 MC***C1*01 MC***H1*00 MC***H1*01
Vac
phases
Hz
110 V
1
60 Hz
Power 37 W 44 W 41 W 48 W
Current 0.54 A 0.60 A 0.64 A 0.70 A
(1) Product approved to UL998 & CSA C22.2 No104
1.6 Opening the packaging
make sure the humidifier is intact upon delivery and immediately
notify the transporter, in writing, of any damage that may be due to
careless or improper transport;
move the humidifier to the site of installation before removing from
the packaging, grasping the neck from underneath;
open the cardboard box, remove the protective material and remove
the humidifier, keeping it vertical at all times.
1.7 Positioning the cabinet
The humidifier should be positioned so as to guarantee the following:
reading the values on the display;
access to the keypad on the display;
opening the front panel;
access to the inside parts for checks and maintenance;
connection of the air and water supply lines;
connection of the air and water distribution lines;
power and control connections;
Important
Important: the drain hose must be connected directly to a drain
located at least 50 mm below the level of the atomising nozzles
1.8 Wall mounting
Fasten the humidifier to a solid support surface using the screws and
bracket supplies.
Make sure there is enough space to connect the air and water inlet and
outlet lines.
390

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rear of the cabinet
200
440
drilling template
440
200
390
= =
= =
1.9 Opening the cabinet door
1. press and turn anticlockwise using a flat-head screwdriver (max 8
mm) until releasing the door;
2. open the door on the cabinet by swinging to the left.
1
2
1.10 Components and accessories
Once having opened the front cover of the humidifier, make sure the
following are included:
kit of screws with
plugs for wall-
mounting;
PG13 cable glands for the electrical
connections

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2. WATER AND AIR CONNECTIONS
Important: before proceeding, disconnect the humidifier from
the power supply.
--RILSANPA11 O 6 8 x 6 DIN 74324 AIM 29 --
--RILSANPA11 O 6 8 x 6 DIN 74324 AIM 29 --
--RILSANPA11 O 6 8 x 6 DIN 74324 AIM 29 --
11
12
13 13 14
1
23
4
1
5
6
6
7
8
9
Air
Water
10
Connections:
1. Install two manual valves upstream of the installation to allow the
air and water lines to be isolated (not supplied by CAREL).
2. Install an oil filter (CAREL code MCFILOIL01) to remove particles of
oil from the compressed air
3. Install a 5 micron air filter (CAREL code MCFILAIR01) upstream of the
cabinet to solid particles from the compressed air.
4. Install a 5 micron water filter (CAREL code MCC05PP005 and the
filter casing code MCFILWAT05) to remove solid particles from the
supply water.
5. Optional: install a UV lamp to sanitise the water (CAREL code
MCKSUV00000). The lamp has an external 230 V 50 Hz power supply.
These UV lamps are used to eliminate any bacteria from the supply
water.
6. Install the air and water lines
7. Prepare a hose at least 50 mm below the level of the atomising
nozzles to drain the water remaining in the lines when the installation
is in standby or off.
8. Atomising nozzle assembly kit for rooms and ducts (CAREL code
MCK1AW0000)
9. Atomising nozzles (for the models see par. 11)
10. Optional, install one of the following components:
• pressure gauge at the end of the air line (CAREL kit code
MCKMA04000) to display the pressure at the end of the line;
• a pressure probe at the end of the line (for the codes of the probes
see Chap. 16.2“Maintenance“) to measure and display the pressure
at the end of the line on the humidifier display
11. Install the humidity probes (for the codes of the CAREL probes see
Chap. 16.2 “Maintenance“)
12. Install a manual valve at the end of the air line.
13. Install one of the following two valves:
• manual valve at the end of the line (not supplied by CAREL).
• drain solenoid valve (CAREL code MCKDVWL000 or code
MCKDVWL001) to perform the “drain”, “fill”, and “washing” functions
(see par. 10.5 “Operating principles”).
14. Optional, install a pressure gauge at the end of the water line
(CAREL code. kit MCKMW02501) to display the pressure at the end of
the water line
Fittings provided for the water connections:
side view, water & air inlet side view, outlet (to nozzles)
1
2
1
2
3
Key:
1. air inlet and outlet
2. water inlet and outlet
3. drain water outlet

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2.1 Characteristics of the water line
Models
MC060*D*0* MC060*1*0* MC230*D*0* MC230*1*0*
max ow-
rate (l/h, lb/h,
G/d)
60 l/h
130 lb/h
380G/d
60 l/h
130 lb/h
130 lb/h
230 l/h
500 lb/h
1450 G/d
230 l/h
500 lb/h
1450 G/d
inlet pressure
(Mpa,Bar,PSI)
0.3 to 0,7 Mpa
3 to 7 Bar
40 to 100 PSI
temperature 1 to 50 ºC / 34 to 122 ºF
inlet G1/2”F NPT1/4”F G1/2”F NPT1/4”F
outlet G1/2”F NPT1/2”F G1/2”F NPT1/2”F
drain TCF 8/10 NPT1/4”F TCF 8/10 NPT1/4”F
2.2 Type of supply water
☺demineralised water by osmosis;
drinking water ((however more dust in the room
and more frequent maintenance and cleaning the nozzles);
softened water
(the mineral content dissolved in the water is not reduced).
recommended supply water characteristics unit of
measure
limits
min. max.
pH 6.5 8.5
Specific conductivity at 20 °C (σR, 20 °C) µS/cm 0 50
Total hardness (TH) mg/l CaCO3025
Temporary hardness mg/l CaCO3015
Total dissolved solids (cR) mg/l (1)(
1)
Dry residue at 180° (R180°C) mg/l (1)(
1)
Iron + Manganese mg/l Fe+Mn 0 0
Chlorides ppm Cl 0 10
Silicon dioxide mg/l SiO201
Chlorine ions mg/l Cl-00
Calcium sulphate mg/l CaSO405
(1)= values depend on the specific conductivity; in general:
CR≅0,65 * σR, 20 °C; R180 ≅0.93 * σR, 20 °C
Important: the supply water must comply with the requirements of
UNI 8884 UNI 8884 standard, “Characteristics and treatment of the water
in cooling and humidification circuits”. According to this standard, the
humidifier must be supplied with water that, as well as being drinkable
(EC directive 98/83), must remain within the following limits:
• electrical conductivity <100 µS/cm;
• total hardness <5 °fH (50 ppm CaCO3);
• 6.5 < pH < 8.5;
• chloride content <20 mg/l;
• silica content <5 mg/l;
• conductivity less than 30 µS/cm (it is recommended to use the MC
cabinet in the version for aggressive water).
Similar requirements are also specified in the European reference
standards VDI6022, VDI3803.
Upstream of the cabinet, connect the following to the water line:
• a water filter with a filter size no greater than 5 microns (filters available
upon request).
• anexpansion vessel (not suppliedbyCarel SpA) witha capacityof several
litres, to avoid water hammer that may damage the installation.
The water line is tested, and checked at a pressure of 0.35 bars downstream
of the cabinet.
2.3 Characteristics of the air line
Models
MC060*D*0* MC060*1*0* MC230*D*0* MC230*1*0*
inlet
pressure
(Mpa,Bar,PSI)
0.5 to 0.7 Mpa
5 to 7 Bar
80 to 100 PSI
temperature 1 to 50 ºC / 34 to 122 ºF
inlet G1/2”F NPT1/2”F G1/2”F NPT1/2”F
outlet G1/2”F NPT1/2”F G1/2”F NPT1/2”F
2.4 Type of compressed air
YES dry and oil-free air
Upstream of the cabinet connect the following devices (available upon
request):
• a 5 micron filter upstream of the cabinet.
• a filter to remove oil and particles upstream of the 5 micron air filter
The air line is tested, and checked at a pressure of 2.1 bars downstream
of the cabinet.
2.5 Type of water and air lines
YES
copper pipes (mains drinking water only),
plastic hoses,
polypropylene hoses: ensure faster and simpler connections by
welding.
NO galvanised steel pipe: may lead to the detachment of impurities,
and cause blocking or damage to the nozzles.
Important: Apply sealant to the joints of the pipes and hoses
running to the atomising nozzles (preferably Teflon or liquid Teflon).
2.6 Water and air line accessories
code description ttings reference
dwg.
page 10
MCFILOIL01 3/8” oil filter for air G3/8”F in /out 2
MCFILAIR01 1/2”air filter G1/2”F in /out 3
MCFILWAT05 5” water filter container G1/2”F in /out 4
MCKSUV0000 UV sanitising kit G1/4”F in /out 5
MCKPT**000 pressure transducer G1/4”M 10 a
MCKMA04000 air outlet pressure gauge 0
to 4 bars
G1/4”M 10 b
MCKDVWL00* NO solenoid valve at end
of line
G1/4”F in /out 13
MCKMW02501 water outlet pressure gauge
0 to 2.5 bars
G1/4”M 14

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3. ELECTRICAL CONNECTIONS
Wiring
Important:
• make sure that the cable glands are applied;
• to avoid interference, separate the power cables from the probe/external
signal cables.
J2 Control signals from humidity/
temperatureprobes,externalcontroller
& air line pressure transducer
Power supply
Important: install a power switch outside the humidifier to completely
isolate the mains power supply.
J13 External utility control
Digital Input
Control signals from external voltage-free contact i.e. ON/OFF humidistat
alarm input from external devices
enable wash water line from external signal
J14 Cumulative alarm relay
J11 Connection for master/slave communication networks (pLAN) External supervisor systems
J24 Power supply for humidity/temperature probes and references for external
controllers
Proportional 0 to 10 Vdc output
pCO3 terminal block
service card
NO8
C7 C4 C1 C8
NO7 NO4 NO1
NC8
C7
NO5 NO2 NO6 NO3
C4 C1
Rx-/Tx-
Rx+/Tx+
GND
J9 J10
J11 J12 J13 J14 J15
J5
J4
J3J2
J1
serial card
field card
ID1 ID2 ID3 ID4 ID5 ID6 ID7 ID8 IDC1 VG VG0 Y1 Y2 Y3 Y4 B4 BC4 B5 BC5 B1 B2 B3
J24
+V term GND +5V ref GND +VDC G G0
max. power: 40 VA / 15 W
1
0
ON
J5
J4
J3J2J1
serial card
field card
service card
J24
J9 J10
J11 J12 J13 J14 J15
J2 J4J24
J10 J13 J14J9 J11

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3.1 Power supply
Depending on the model:
MC****D*** voltage 230V 1~ 50Hz
MC****1*** voltage 110V 1~ 60Hz
Important: The cables must be shielded and conform to local
standards. Install a power switch outside the humidifier to completely
isolate the mains power supply.
G0
NO4
L
N/W
GR
G0
NO4
ID1
ID1
ID2
ID2
ID3
ID3
ID4
ID4
ID6
ID6
ID7
ID7
COM1
COM1 COM2
COM2
COM3
COM3
F1 1A F2 1A
L
N/W
GR/PE
Connections:
MC cabinet Power cable
L L/F (phase)
N N/W (neutral)
GR GR/PE (earth)
3.2 Remote ON/OFF (ID & COM)
Use two-wire shielded cable, AWG20/22
G0
NO4
L
N/W
GR
G0
NO4
ID1
ID1
ID2
ID2
ID3
ID3
ID4
ID4
ID6
ID6
ID7
ID7
COM1
COM1 COM2
COM2
COM3
COM3
F1 1A F2 1A
1
1Remote ON/OFF
Connections:
MC cabinet Remote ON/OFF
ID1 NC/NO
COM (1 or 2 or 3) CON
GR shield
3.3 Modulating control signal (J24 & J2)
The input control signal connections depend on the control algorithm
activated.
cables
up to 30 m: shielded cables, size 0.5 mm2 (AWG20)
over 30 m: shielded cables, size 1.5 mm2(AWG15)
connect the shield (cabinet side) to specific earth
terminal GR (see connection diagrams)
the signal can
come from
a. modulating control with external controller
b. modulating control with ambient humidity probe
c. external controller & limit humidity probe
d. ambient humidity probe & limit humidity probe
e. modulating control with temperature control
f. mod. control with temperature control & limit probe
To set the type of operation, control and signal:
installer menu > type of control (see chap. 7).
a. Modulating control with external controller
0 to 1 V 0 to 10 V 2 to 10 V 0 to 20 mA 4to20mA
J4
J3J2
VG VG0 Y1 Y2 Y3 B4 BC4 B5 BC5 B1 B2 B3
J24
+V
term
GND +5V
ref
GND +VDC
1
GR
1External controller
Connections:
MC cabinet external controller
J24 GND REF
J2 B1 OUT
b. Modulating control with ambient humidity probe
0 to 1 V 0 to 10 V 2 to 10 V 0 to 20 mA 4to20mA
J4
J3J2
VG VG0 Y1 Y2 Y3 B4 BC4 B5 BC5 B1 B2 B3
J24
+V term GND +5V ref GND +VDC
1
GR
1Ambient humidity probe
Connections:
MC cabinet ambient humidity probe
J24 +V term +(G)
GND M
J2 B1 out H
c. Modulating control with external controller and limit
probe
0 to 1 V 0 to 10 V 2 to 10 V 0 to 20 mA 4to20mA
J4
J3J2
VG VG0 Y1 Y2 Y3 B4 BC4 B5 BC5 B1 B2 B3
J24
+V
term
GND +5V
ref
GND +VDC
1
GR
2
GR
1Limit humidity probe 2External controller

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Connections:
MC cabinet limit humidity probe external controller
J24 +V term +(G) -
GND M REF
J2 B1 - OUT
B2 out H -
d. Mod. control with ambient probe & limit probe
0 to 1 V 0 to 10 V 2 to 10 V 0 to 20 mA 4to20mA
J4
J3J2
VG VG0 Y1 Y2 Y3 B4 BC4 B5 BC5 B1 B2 B3
J24
+V
term
GND
+5V
ref
GND +VDC
1
GR
2
GR
1Limit humidity probe 2Ambient humidity probe
Connections:
MC cabinet limit humidity probe amb. humidity probe
J24 +V term +(G) +(G)
GND M M
J2 B1 - out H
B2 out H -
e. Modulating control with temperature control
0 to 1 V 0 to 10 V 2 to 10 V 0 to 20 mA 4to20mA NTC
J4
J3J2
VG VG0 Y1 Y2 Y3 B4 BC4 B5 BC5 B1 B2 B3
J24
+V
term
GND +5V
ref
GND +VDC
1
GR
1Ambient temperature probe
Connections:
MC cabinet Ambient temperature and limit humidity probe
J24 +V term +(G)
GND M
J2 B1 out T
or
J4
J3J2
VG VG0 Y1 Y2 Y3 B4 BC4 B5 BC5 B1 B2 B3
J24
+V
term
GND +5V
ref
GND +VDC
NTC
f. Modulating control with temperature control and
humidity limit probe
0 to 1 V 0 to 10 V 2 to 10 V 0 to 20 mA 4to20mA NTC
J4
J3J2
ID1 VG VG0 Y1 Y2 Y3 Y4 B4 BC4 B5 BC5 B1 B2 B3
J24
+V
term
GND +5V
ref
GND +VDC
GR
1
1Ambient temperature and limit humidity probe
Connections:
MC cabinet Ambient temperature and limit humidity probe
J24 +V term +(G)
GND M
J2 B1 out T
B2 out H
Or:
J4
J3J2
ID1 VG VG0 Y1 Y2 Y3 Y4 B4 BC4 B5 BC5 B1 B2 B3
J24
+V
term
GND
+5V
ref
GND +VDC
1
GR
2
GR
1Limit humidity probe 2Temperature probe
Connections:
MC cabinet (1) limit hum. probe (2) temperature probe
J24 +V term +(G) +(G)
GND M M
J2 B1 - out T
B2 out H -
3.4 Control signals from ext. voltage-free
contact i.e. ON/OFF humidistat (ID & COM)
Cables: up to 30 m: shielded cables, size 0.5mm2 (AWG20)
over 30 m: shielded cables, size 1.5 mm2(AWG15)
G0
NO4
L
N/W
GR
G0
NO4
ID1
ID1
ID2
ID2
ID3
ID3
ID4
ID4
ID6
ID6
ID7
ID7
COM1
COM1 COM2
COM2
COM3
COM3
F1 1A F2 1A
1
Contact open: MC unit off
Contact closed: MC unit on
1ON/OFF humidistat
MC cabinet ON/OFF humidistat
ID2 ON/OFF
COM1 COM
GR shield

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3.5 Control signals from air line pressure
transducer (J2)
Transducer:
CAREL (for the codes of the probes see chap. 16.2
“Maintenance“) -0 to 4 bars/ 4 to 20 mA (-11 to
60 psi). Supplied with cable in different lengths,
depending on the code (10 m, 50 m, 100 m)
J5
J4
J3J2J1
serial card
field card
ID1 ID2 ID3 ID4 ID5 ID7 ID8 IDC1 VG VG0 Y1 Y2 Y3 Y4 B4 BC4 B5 BC5 B1 B2 B3
J24
+V term GND +5V ref GND +VDC G G0
input: 24 V / V ; 50 to 60 Hz
max. power: 40 VA / 15 W
1
GR
1Pressure probe
Connections:
MC cabinet cable pressure probe
J2
B3 white C
GR shield -
+ VDC black A
3.6 Connection of NO drain solenoid valve at
end of water line (group of ID terminals)
NO solenoid valve
(normally open):
CAREL code MCKDVWL000
or code MCKDVWL001 (20 VA 24 Vac)
Recommended
connection cables
up to 100 m: shielded cables, size 1.5 mm2
(AWG1.5)
up to 200 m: shielded cables, size 2.5 mm2
(AWG13)
Electrical specications
of the contact
power 500 VA
voltage 250 V
current 2 A resistive/inductive
G0
NO4
L
N/W
GR
G0
NO4
ID1
ID1
ID2
ID2
ID3
ID3
ID4
ID4
ID6
ID6
ID7
ID7
COM1
COM1 COM2
COM2
COM3
COM3
F1 1A F2 1A
1
NO
1NO solenoid valve (normally open) water line
Connections:
MC cabinet solenoid valve
G0 1
NO4 2
GR 4
3.7 External utility control (J13)
Cable shielded AWG 15/20
Control to interface MC
with:
compressors
water treatment systems
Electrical specifications of
the contact
power 500 VA
voltage 250 V
current 2 A resistive/inductive
Status of the contact in
function of MC status:
MC cabinet OFF or in
standby contact open
cabinet with
production request contact closed
1
NO8
C7
C4
NO7
NO4
C7
NO5 NO6
C4
J13 J14
L
N/W
GR
COM1
COM1 COM2
COM2
COM3
COM3
F1 1A F2 1A
1Start compressor / water treatment
Connections:
MC cabinet Output
J13 NO5 ON/OFF
C4 COM
GR shield
3.8 Cumulative alarm relay (J14)
Activated when one or more alarms is detected via a contact/output that
can be transferred to a supervisory system
Cable shielded AWG 15/20
Electrical specifications of
the relay
power 500 VA
voltage 250 V
current 2 A resistive/inductive
Status and operation of
the relay:
contact open no active alarms
contact closed active alarm/alarms
1
NO8
C7
C8
NO7
NC8
C7
J14 J15
L
N/W
GR
COM1
COM1 COM2
COM2
COM3
COM3
F1 1A F2 1A
1Alarm relay
Connections:
MC cabinet Output
J14 C07 COM
N07 ON/OFF
GR shield

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3.9 Alarm inputs from external devices
Inputs for signalling the
status of external devices
such as:
air flow sensor
air compressor alarm
water treatment system alarm
Cable: shielded AWG 15/20
Configuration of type of
contact: see installer menu > external alarms
Connections:
water treatment system
contacts: ID3 & COM1
air compressor
contacts: ID4 & COM1
air flow switch
contacts: ID6 & COM2
12
ID3
COM1
ID4
COM1
3
ID6
COM2
G0
NO4 ID1 ID2 ID3 ID4 ID6 ID7
COM1 COM2 COM3
F1 1A F2 1A
1Alarm relay from water treatment
2Compressor alarm relay
3Flow switch alarm relay
Connections:
MC cabinet Relay
ID3 ON/OFF Alarm relay from water treatment
COM1 COM
ID4 ON/OFF Compressor alarm relay
COM1 COM
ID6 ON/OFF Air flow switch alarm relay
COM2 COM
GR shield
3.11 Enable wash water line on external signal
Manages the washing of the water line based on an external signal.
To do this, set: installer menu > operating options > valve at the end of
the line (YES) > special functions > wash > manual
Cable: shielded AWG 15/20
Status and operation of
the contact:
contact open wash line not enabled
externally
contact closed wash line enabled
externally
G0
NO4
L
N/W
GR
G0
NO4
ID1
ID1
ID2
ID2
ID3
ID3
ID4
ID4
ID6
ID6
ID7
ID7
COM1
COM1 COM2
COM2
COM3
COM3
F1 1A F2 1A
1
1External contact for activating the wash function
Connections:
MC cabinet Relay for activating wash on ext. signal
ID7 ON/OFF
COM1 COM
3.12 Supervisor network
J5
J4
J3J2J1
serial card
field card
service card
ID1 ID2 ID3 ID4 ID5 ID7 ID8 IDC1 VG VG0 Y1 Y2 Y3 Y4 B4 BC4 B5 BC5 B1 B2 B3
J24
+V term GND +5V ref GND +VDC G G0
NO8
C7 C4 C1 C8
NO7 NO4 NO1
NC8
C7
NO5 NO2 NO3
C4 C1
Rx-/Tx-
Rx+/Tx+
GND
J9 J10
J11 J12 J13 J14 J15
input: 24 V / V ; 50 to 60 Hz
max. power: 40 VA / 15 W
J
3
J
2
J1
f
ield card
s
ervice car
d
I I I
ID
ID
ID
ID
8
ID
C1
V
V
Y
Y
Y
Y
B
4
B
C4
B
5
B
C5
B
1
B
2
B
3
J2
4
+
V
te
rm
G
ND
+5
V
ref
G
ND
+
VD
C
G
G0
NO
8
C7
C
4
C1
C8
N
O7
N
O
4
N
O1
NC
8
C7
N
O5
N
O2
N
O3
C
4
C1
R
x-
/
Tx-
Rx+
/
Tx
+
G
ND
J9
J
10
J11
J
1
2
J1
3
J14
J15
input: 24 V / V ; 50 to 60 Hz
max. power: 40 VA / 15 W
D
D
D
D
D
D
D
D
D
D
D
D
Y
Y
Y
Y
Y
Y
Y
Y
V
V
V
V
CAREL optional cards
network/card protocol supported
PCOS004850 RS485 CAREL, Modbus®
PCO100MDM0 RS232 (external
modem) CAREL for remote connections
PCO1000WB0 Ethernet™
TCP/IP
SNMP v1 &v2c
BACnet™ Ethernet™ ISO8802-2/8802-3
BACnet/IP
PCO10000F0 LON in FTT10 (*) LON-Echelon
PCO1000BA0 Ethernet™
(Modbus®) BACnet™ MS/TP
(*) When suitably programmed
Important: Follow the instructions provided with the optional
cards as regards the technical specifications, connections and
expansions.
3.13 Proportional 0 to 10 Vdc output (J4)
Parallel output to the 0 to 10 Vdc signal sent to the proportional valve.
J5
J4
ID1 ID2 ID3 ID4 ID5 ID7 ID8 IDC1 VG VG0 Y1 Y2 Y3 Y4 BC5
0...10 Vdc
Rif.
MC cabinet Outputs
VG0 REF.
Y1 0 to 10 Vdc
Output specications: maximum load 1 kΩ (10 mA)

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4. MASTER/SLAVE APPLICATIONS
• MC master cabinet: unit fitted with display to manage the operation
of the unit itself and the other units connected
• MC slave cabinet: unit without display that normally works based on
the controls received from the master
• pLAN: serial communication system to connect the master unit to the
slaves across a local network
• each master unit can be connected to up to 5 slave units
• serial address: numeric code that automatically identifies each unit
cabinet in the installation. Master unit: address 1, Slave unit: address
2. The serial address is already stored in the controller on the unit, and
should only be modified on the Slave unit when there are multiple
units (see paragraph 4.3)
• for the software configuration of the pLAN network, see installer menu
> pLAN conguration
4.1 Applications for one large space or AHU
(single point)
• Ideal for large rooms (or air handling units) where the required water
capacity exceeds the output of a single MC cabinet.
• Only the master unit is fitted with a probe, and the values saved are
applied to all the units connected.
pLAN
S
l
a
ve
1
Maste
r
S
l
ave 5
W
ater
&
Air
l
ine
s
up to 5 S
l
ave units
AHU
/
Room 1
AHU - Air Handling Unit
4.2 Applications for multiple spaces or AHUs
(multizone)
• Ideal for applications in a series of separate rooms (or air handling
units).
• Each MC cabinet is fitted with a probe, the values saved by each probe
are managed by the cabinet this is connected to.
• To ensure continuity of operation in the event of interruption of the
serial communication see installer menu > type of control > stop slave
offline.
pLAN
Sla
ve 1
M
aster Sl
a
ve
5
W
a
ter
&
Air lin
es
u
p
to 5 Slave units
AHU
/
Room
2
AHU /Room
1
AHU
/
Room
1
AHU - Air Handling Unit
4.3 Setting the serial address for units with
multiple slaves
• The serial address is used to automatically identify each MC unit in the
installation.
• The address is already configured: for the master unit=1; for the slave
unit=2.
• The slave units do not have terminals.
• In systems with a series of slaves, the serial address must be changed
to avoid having the same address (2) on all the units (causing conflict
in the event of pLAN communication).
• To set the pLAN address, use the kit PGD0002F0K.
Important: The serial addresses must be changed before
connecting the pLAN network.
Instructions for changing the serial address on the slave units using the
kit PGD0002F0K:
• complete the power supply connections (see paragraph 3.1);
• switch off the MC cabinet (make sure the power supply is
disconnected);
• connect the cable in the terminal kit to output J10 on the cabinet
• switch the cabinet on;
• press the ALARM and UP buttons together until the display shows the
message “self test please wait” (displayed for a few seconds, before the
address setting screen) ;
• set the required address using UP or DOWN (to a value higher than 2)
and press ENTER to confirm and exit;
• the MC slave unit has now been configured with a new serial address,
switch the unit off, disconnect the cable and repeat for the other
units.
Once configuration has been completed, connect the pLAN serial line
(see the following paragraph)
Important: only change the serial address on the slaves, and not
on the master.
Table of serial addresses (installer’s responsibility, see installer
menu > pLAN configuration):
unit unit name room or AHU serial
address
master ................................................ ................................................ 1
slave 1 ................................................ ................................................ .......
slave 2 ................................................ ................................................ .......
slave 3 ................................................ ................................................ .......
slave 4 ................................................ ................................................ .......
slave 5 ................................................ ................................................ .......

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4.4 pLAN network connection (J11)
Use two-wire cables plus earth, AWG 20/22, maximum distance between
two cabinets: 200 m (219 yd).
MASTER SLAVE
GR
GR
service card
Rx-/Tx-
Rx+/Tx+
GND
J9 J10
J11
service card
Rx-/Tx-
Rx+/Tx+
GND
J9 J10
J11
Connections:
MC Master cabinet J11 MC Slave cabinet
J11
RX+/TX+
J11
RX+/TX+
RX-/TX- RX-/TX-
GND GND
In multizone mode, by disabling the “stop slave off line” function, if the
pLAN is interrupted the slaves operate independently according to the
signals from the probes or/and controllers. In this mode, the values will
not be shown on the master display.

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5. STARTING AND USER INTERFACE
Before starting the humidifier, check:
water and air connections (chap. 2). In the event of water leaks do not
start the humidifier before having resolved the problem;
electrical connections (chap. 3)
5.1 Starting
1
0
O
N
5.2 Stopping
1
0
OFF
Note: if the system is stopped for an extended time, open the
valve at the end of the water line to assist drainage. If the system
is fitted with drain solenoid valves at the end of the line (optional), this is
done automatically.
5.3 First start-up (setting the language)
On power-up, the following screen is displayed:
Select language:
1. English
2. Italiano
3. Deutsch
4. Francais
5. Espaniol
Press ENTER to go the list of languages, then UP to select the desired
language and ENTER to confirm. This screen remains displayed for 60
seconds.
Subsequently, the following screen will be displayed:
Show language mask at unit start-up Yes/No
• YES: the screen for choosing the language will be displayed when the
humidifier is started the next time;
• NO: the screen for choosing the language will no longer be displayed
on power-up.
Note: The language can also be changed from the maintenance
menu (maintenance menu > system info > language).
5.4 Keypad
6
4
5
3
2
1
button function
(1) alarm list active alarms and reset any alarms present
(2) PRG return to the “main”screen
from the “main” screen access the main menu
(3) ESC return to the previous screen/display
(4) UP circular navigation inside the menus, the screens, the
parameters and the values of the parameters
from the “main” screen, access an “INFO menu”
(5) ENTER select and confirm (like the “Enter” key on a computer
keyboard)
from the main menu, access the“SET” screen
(6) DOWN circular navigation inside the menus, the screens, the
parameters and the values of the parameters
from the main screen, access the pLAN screens and connect
to the SLAVE cabinets
5.5 “Main” screen
1
2
3
4
6
5
7
8
9
(1) description of unit status (*)
(2) line 2 description of unit status (**)
(3) value read according to the type of signal connected
(4) status of the atomising nozzles:
atomising nozzles operating
atomising nozzles off
(5) time bands set
(6) access the“INFO” screen (UP button)
(7) access the“SET” screen (ENTER button)
(8) access the“pLAN” screen (DOWN button)
(9) Symbol on display:
no image: master unit not connected to a network (stand alone)
master unit connected to a pLAN network for multiple spaces
master unit connected to a pLAN network for single spaces
slave unit

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(*) Types of descriptions:
• IN OPERATION: atomised water production in progress,
• SHUTDOWN ALARM: production stopped due to an alarm,
• OFF FROM SUPERVISOR: production stopped by supervisor,
• OFF FROM SCHEDULER: production stopped during the set time
band,
• OFF FROM REMOTE: production stopped due to opening of the
“Remote ON/OFF” contact,
• OFF FROM KEYPAD: production stopped from the keypad (see “SET”
screen),
• MANUAL MODE: manual mode activated (see maintenance menu)
• NO REQUEST: unit on without production request.
(**) Types of unit status description, line 2:
• DRAIN: unit draining;
• FILL: unit filling the water line;
• CLEANING: unit cleaning the heads on the air line;
• WASHING: unit washing the water line.
5.6 “INFO” screens (read-only)
Series of read-only screens for displaying the main humidifier status
values. To access, press UP from the “Main” screen. There are two “INFO”
screens; to move from one screen to the next, press UP or DOWN.
Press ESC to return to the “Main”screen.
Info (1/2)
display UOM
Request 50-100 %
Air line ON/OFF
Water line ON/Drain
Type of op.. ON/OFF or Modulating
Press. sensor bar/psi
Date & time dd/mm/yy 00:00
Info (2/2)
display UOM
Humidifier model
In production YES/NO
Hours production h
Date & time dd/mm/yy 00:00
5.7 “SET” screen
Used to set the main values for the humidifier.
From the main screen press:
• ENTER to access the menu;
• ENTER to move from one value to the next;
• UP & DOWN to modify the selected value;
• ENTER confirm and go to the next value.
Parameter range default UOM
Set point 0 to 100 50 %rH- °C/°F
Humidifier AUTO / OFF OFF -
Max. prod. 50 to 100 100 %
Prop. band 2 to 19.9 5 %rH- °C/°F
Limit set (limit probe set
point)*
0 to 100 80 %rH
Prop. band* 2 to 19.9 5 %rH
* visible only if the limit probe is enabled
5.8 “pLAN” screen
From the main screen press:
• DOWN to access the menu;
• ENTER to select the unit;
• UP & DOWN to move from one unit to the next;
• ENTER to confirm.
Units connected
1 (master)
2 (slave)
3 (slave)
4 (slave)
5 (slave)
6 (slave)
Current:
Network: