Carel MCmultizone User Manual

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Integrated Control Solutions & Energy Savings

MCmultizone

atomising humidi ers

User manual

ENG

“MCmultizone” +030221981 - rel. 2.3 - 09.12.2014

WARNINGS

CAREL S.p.A. humidiﬁ ers are advanced products, whose operation is speciﬁ ed 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/conﬁ guration/programming/commissioning to be able to operate in the best possible way for the speciﬁ c application. The failure to complete such operations, which are required/indicated in the user manual, may cause the ﬁ nal product to malfunction; CAREL S.p.A. accepts no liability in such cases. The customer (manufacturer, developer or installer of the ﬁ nal equipment) accepts all liability and risk relating to the conﬁ guration of the product in order to reach the expected results in relation to the speciﬁ c ﬁ nal 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 humidiﬁ er and the ﬁ nal 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 humidiﬁ er contains live electrical components. Disconnect the mains power supply before accessing inside parts or during maintenance and installation.

• DANGER OF WATER LEAKS

The humidiﬁ er automatically and constantly ﬁ lls/drains certain quantities of water. Malfunctions in the connections or in the humidiﬁ er may cause leaks.

Important

Important:

• The installation of the product must include an earth connection, using the

special yellow-green terminal available in the humidiﬁ er.

• The environmental and power supply conditions must conform to the

values speciﬁ ed on the product rating labels.

• The product is designed exclusively to humidify rooms either directly or

through distribution systems (ducts, atomising racks).

• Only qualiﬁ ed 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

speciﬁ ed in this manual. Important, demineralised drinking water must be used (as speciﬁ ed 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 humidiﬁ cation section) and the droplet separator (at the end of the humidiﬁ cation 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 modiﬁ cations 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 humidiﬁ er in ways other than those speciﬁ ed

in the manual.

• Observe the standards in force in the place where the humidiﬁ er is

installed.

• Keep the humidiﬁ er 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 humidiﬁ er.

• Do not use corrosive chemicals, solvents or aggressive detergents to clean

the inside and outside parts of the humidiﬁ er, unless speciﬁ cally indicated in the user manual.

• Do not drop, hit or shake the humidiﬁ er, 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 speciﬁ cations shown in the manual may be changed without prior warning. The liability of CAREL S.p.A. in relation to its products is speciﬁ ed in the CAREL S.p.A. general contract conditions, available on the website www. carel.com and/or by speciﬁ c agreements with customers; speciﬁ cally 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 humidiﬁ er 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 deﬁ ned 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 eﬀ ects 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 speciﬁ ed 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 certiﬁ ed design and production system, as well as by the mark..

ENG

“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 conﬁ guration.........................................................................................24

7.3 Operating options ...........................................................................................24

7.4 Special functions ...............................................................................................24

7.5 Supervisor ..............................................................................................................25

7.6 External alarms ....................................................................................................25

7.7 pLAN conﬁ guration .........................................................................................25

8. MAINTENANCE MENU 26

8.1 Reset conﬁ gurations .......................................................................................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/ﬁ ll ...............................................................................................................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 humidiﬁ er .........................................................7

1.2 Models ........................................................................................................................7

1.3 Dimensions and weights ...............................................................................7

1.4 Components ..........................................................................................................8

1.5 Electrical speciﬁ cations.....................................................................................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 pCO

controllers .....................................................46

16.6 Electrical panel kit and spare parts (see paragraph 1.4) .........46

17. TROUBLESHOOTING 47

17.1 Troubleshooting table .................................................................................47

ENG

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1. INTRODUCTION AND ASSEMBLY

1.1 MCmultizone atomising humidi er

Humidiﬁ cation system designed for medium/large installations, where are a large humidiﬁ cation capacity is required with low energy consumption (high water ﬂ ow without excessive energy costs). Water and air, suitably regulated in terms of ﬂ ow-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 ﬁ ne 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 humidiﬁ ed, 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 ﬁ tted 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 humidiﬁ ers are available by:

• size: with maximum ﬂ ow-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

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

1 3

11 12 13 14 15

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

50/60 Hz

230 V

50 Hz

230 V

50/60 Hz

230 V

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

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 humidiﬁ er 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 humidiﬁ er 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 humidiﬁ er, keeping it vertical at all times.

1.7 Positioning the cabinet

The humidiﬁ er 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 humidiﬁ er 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 ﬂ at-head screwdriver (max 8

mm) until releasing the door;

2. open the door on the cabinet by swinging to the left.

1.10 Components and accessories

Once having opened the front cover of the humidiﬁ er, make sure the following are included:

kit of screws with

plugs for wallmounting;

PG13 cable glands for the electrical

connections

ENG

“MCmultizone” +030221981 - rel. 2.3 - 09.12.2014

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2. WATER AND AIR CONNECTIONS

Important: before proceeding, disconnect the humidiﬁ er from the power supply.

--RILSAN PA1

1 O 6 8 x 6 DIN 74324 AIM 29 --

--RILSAN PA1

1 O 6 8 x 6 DIN 74324 AIM 29 --

--RILSAN

PA1

1 O 6 8 x 6 DIN 74324 AIM

29 --

Air

Water

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 ﬁ lter (CAREL code MCFILOIL01) to remove particles of

oil from the compressed air

3. Install a 5 micron air ﬁ lter (CAREL code MCFILAIR01) upstream of the

cabinet to solid particles from the compressed air.

4. Install a 5 micron water ﬁ lter (CAREL code MCC05PP005 and the

ﬁ lter 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 humidiﬁ er 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”, “ﬁ ll”, 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)

Key:

1. air inlet and outlet

2. water inlet and outlet

3. drain water outlet

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“MCmultizone” +030221981 - rel. 2.3 - 09.12.2014

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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  owrate (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 Speciﬁ c conductivity at 20 °C (

R, 20 °C

)

µS/cm 0 50

Total hardness (TH) mg/l CaCO

025 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 SiO

01 Chlorine ions mg/l Cl

00 Calcium sulphate mg/l CaSO

(

)= values depend on the speciﬁ c conductivity; in general:

≅0,65 * σ

R, 20 °C

; R

180

≅0.93 * σ

R, 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 humidiﬁ cation circuits”. According to this standard, the humidiﬁ er 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 speciﬁ ed in the European reference standards VDI6022, VDI3803.

Upstream of the cabinet, connect the following to the water line:

• a water ﬁ lter with a ﬁ lter size no greater than 5 microns (ﬁ lters available

upon request).

• an expansion vessel (not supplied by Carel SpA) with a capacity of 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 ﬁ lter upstream of the cabinet.

• a ﬁ lter to remove oil and particles upstream of the 5 micron air ﬁ lter

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.

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 Teﬂ on or liquid Teﬂ on).

2.6 Water and air line accessories

code description  ttings reference

dwg. page 10

MCFILOIL01 3/8” oil ﬁ lter for air G3/8”F in /out 2 MCFILAIR01 1/2” air ﬁ lter G1/2”F in /out 3 MCFILWAT05 5” water ﬁ lter 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.

Control signals from humidity/ temperature probes, external controller & air line pressure transducer

Power supply

Important: install a power switch outside the humidiﬁ er 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

NO7

NO4

NO1

NC8

NO5

NO2

NO6

NO3

Rx-/Tx-

Rx+/Tx+

GND

J9 J10

J11

J12 J13 J14 J15

J3J2

serial card

field card

ID1

ID2

ID3

ID4

ID5

ID6

ID7

ID8

IDC1

VG0Y1Y2Y3Y4

BC4B5BC5

B1B2B3

J24

+V term

GND

+5V

ref

GND

+VDC

max. power: 40 VA / 15 W

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 humidiﬁ er to completely isolate the mains power supply.

NO4

N/W

NO4

ID1

ID2

ID3

ID4

ID6

ID7

COM1

COM1 COM2

COM2

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

NO4

N/W

NO4

ID1

ID2

ID3

ID4

ID6

ID7

COM1

COM1 COM2

COM2

COM3

F1 1A

F2 1A

Remote 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 mm

(AWG15) connect the shield (cabinet side) to speciﬁ c 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 4 to 20 mA

J3J2

VG0Y1Y2

BC4B5BC5

B1B2B3

J24

term

GND

+5V

ref

GND

+VDC

External 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 4 to 20 mA

J3J2

VG0Y1Y2

BC4B5BC5

B1B2B3

J24

+V term

GND

+5V ref

GND

+VDC

Ambient 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 4 to 20 mA

J3J2

VG0Y1Y2

BC4B5BC5

B1B2B3

J24

term

GND

+5V

ref

GND

+VDC

Limit humidity probe 2 External controller

ENG

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Connections:

MC cabinet limit humidity probe external controller

J24

+V term +(G) -

GND M REF

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 4 to 20 mA

J3J2

VG0Y1Y2

BC4B5BC5

B1B2B3

J24

term

GND

+5V

ref

GND

+VDC

Limit humidity probe 2Ambient humidity probe

Connections:

MC cabinet limit humidity probe amb. humidity probe

J24

+V term +(G) +(G)

GND M M

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 4 to 20 mA NTC

J3J2

VG0Y1Y2

BC4B5BC5

B1B2B3

J24

term

GND

+5V

ref

GND

+VDC

Ambient temperature probe

Connections:

MC cabinet Ambient temperature and limit humidity probe

J24

+V term +(G)

GND M

J2 B1 out T

J3J2

VG0Y1Y2

BC4B5BC5

B1B2B3

J24

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 4 to 20 mA NTC

J3J2

ID1

VG0Y1Y2Y3Y4

BC4B5BC5

B1B2B3

J24

term

GND

+5V

ref

GND

+VDC

Ambient temperature and limit humidity probe

Connections:

MC cabinet Ambient temperature and limit humidity probe

J24

+V term +(G)

GND M

B1 out T B2 out H

Or:

J3J2

ID1

VG0Y1Y2Y3Y4

BC4B5BC5

B1B2B3

J24

term

GND

+5V

ref

GND

+VDC

Limit humidity probe 2 Temperature probe

Connections:

MC cabinet (1) limit hum. probe (2) temperature probe

J24

+V term +(G) +(G)

GND M M

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 mm

(AWG15)

NO4

N/W

NO4

ID1

ID2

ID3

ID4

ID6

ID7

COM1

COM1 COM2

COM2

COM3

F1 1A

F2 1A

Contact open: MC unit oﬀ Contact closed: MC unit on

ON/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 diﬀ erent lengths, depending on the code (10 m, 50 m, 100 m)

J3J2J1

serial card

field card

ID1

ID2

ID3

ID4

ID5

ID7

ID8

IDC1

VG0Y1Y2Y3Y4

BC4B5BC5

B1B2B3

J24

+V term

GND

+5V

ref

GND

+VDC

input: 24 V / V ; 50 to 60 Hz max. power: 40 VA / 15 W

Pressure probe

Connections:

MC cabinet cable pressure probe

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 mm

(AWG1.5) up to 200 m: shielded cables, size 2.5 mm

(AWG13)

Electrical speci cations of the contact

power 500 VA voltage 250 V current 2 A resistive/inductive

NO4

N/W

NO4

ID1

ID2

ID3

ID4

ID6

ID7

COM1

COM1 COM2

COM2

COM3

F1 1A

F2 1A

NO 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 speciﬁ cations 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

NO8

NO7

NO4C7NO5

NO6

J13 J14

N/W

COM2

COM3

F1 1A

F2 1A

Start 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 speciﬁ cations 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

NO8

NO7

NC8

J14 J15

N/W

COM2

COM3

F1 1A

F2 1A

Alarm relay

Connections:

MC cabinet Output

J14

C07 COM N07 ON/OFF

GR shield

ENG

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3.9 Alarm inputs from external devices

Inputs for signalling the status of external devices such as:

air ﬂ ow sensor air compressor alarm

water treatment system alarm Cable: shielded AWG 15/20 Conﬁ guration of type of contact:

see installer menu > external alarms

Connections:

water treatment system

contacts: ID3 & COM1

air compressor

contacts: ID4 & COM1

air ﬂ ow switch

contacts: ID6 & COM2

ID3

COM1

ID4

COM1

ID6

COM2

NO4

ID1

ID2

ID3

ID4

ID6

ID7

COM1 COM2 COM3

F1 1A

F2 1A

Alarm relay from water treatment

Compressor alarm relay

Flow 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 ﬂ ow 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

NO4

N/W

NO4

ID1

ID2

ID3

ID4

ID6

ID7

COM1

COM1 COM2

COM2

COM3

F1 1A

F2 1A

External 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

J3J2J1

serial card

field card

service card

ID1

ID2

ID3

ID4

ID5

ID7

ID8

IDC1

VG0Y1Y2Y3Y4

BC4B5BC5

B1B2B3

J24

+V term

GND

+5V

ref

GND

+VDC

NO8

NO7

NO4

NO1

NC8

NO5

NO2

NO3

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

3J2

ield card

ervice car

III

ID8ID

B4BC4B5B

C5B1B2B3

O7NO

O5NO2NO3

Tx-

Rx+

J11

J12J13

J14

J15

input: 24 V / V ; 50 to 60 Hz

max. power: 40 VA / 15 W

DDDDD

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 speciﬁ cations, 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.

ID1

ID2

ID3

ID4

ID5

ID7

ID8

IDC1

VG0Y1Y2Y3Y4

BC5

0...10 Vdc

Rif.

MC cabinet Outputs

VG0 REF.

Y1 0 to 10 Vdc

Output speci cations: maximum load 1 kΩ (10 mA)

ENG

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4. MASTER/SLAVE APPLICATIONS

• MC master cabinet: unit ﬁ tted 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 identiﬁ es 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 modiﬁ ed on the Slave unit when there are multiple units (see paragraph 4.3)

• for the software conﬁ guration of the pLAN net work, 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 ﬁ tted with a probe, and the values saved are

applied to all the units connected.

pLAN

Sla

Maste

rSl

ave 5

ater & Air line

up to 5 Slave 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 ﬁ tted 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 oﬄ ine.

pLAN

Sla

ve 1

aster

Slave

ter &Air lin

up to 5 Slave units

AHU /Room

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 conﬁ gured: 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 conﬂ ict 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 conﬁ rm and exit;

• the MC slave unit has now been conﬁ gured with a new serial address,

switch the unit oﬀ , disconnect the cable and repeat for the other units.

Once conﬁ guration 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 conﬁ guration):

unit unit name room or AHU

serial

address

master ................................................ ................................................ 1

slave 1 ................................................ ................................................

.......

slave 2 ................................................ ................................................

.......

slave 3 ................................................ ................................................

.......

slave 4 ................................................ ................................................

.......

slave 5 ................................................ ................................................

.......

ENG

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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

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.

ENG

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5. STARTING AND USER INTERFACE

Before starting the humidiﬁ er, check:

water and air connections (chap. 2). In the event of water leaks do not

start the humidiﬁ er before having resolved the problem;

electrical connections (chap. 3)

5.1 Starting

5.2 Stopping

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 ﬁ tted 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 conﬁ rm. 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

humidiﬁ er 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

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 conﬁ rm (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

(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

ENG

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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 ﬁ lling 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 humidiﬁ er 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

Humidiﬁ er model

In production

YES/NO

Hours production

Date & time

dd/mm/yy 00:00

5.7 “SET” screen

Used to set the main values for the humidiﬁ er. 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 conﬁ rm and go to the next value.

Parameter range default UOM

Set point 0 to 100

50 %rH- °C/°F

Humidiﬁ er 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 conﬁ rm.

Units connected

1 (master)

2 (slave)

3 (slave)

4 (slave)

5 (slave)

6 (slave)

Current: Network:

ENG

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5.9 Main menu

To access press PRG from the main screen

Buttons:

• UP & DOWN: navigation inside the submenus, screens, and range of

values and settings;

• ENTER: conﬁ rm and save the changes made;

• ESC: to go back (pressed repeatedly returns to the “Main” screen).

1. User (no password)

1. Alarm thresholds Main probe thresholds

High alarm Low alarm Limit probe thresholds High alarm Alarm delay

2. Clock Clock Hour Day Month Year Format Day

3. Enable scheduler Enable scheduler Scheduler On/Off Variable set point

4. Set scheduler Set scheduler P1-1 P1-2 P2 P3 P4

5.Weekly scheduler Weekly scheduler Monday Tuesday Wednesday Thursday Friday Saturday Sunday

6. Scheduled setp. Scheduled set points Z1 Z2 Z3 Z4

2. Installer (password 77)

1. Type of control Type of operation Type of signal or probe Type of signal or probe Main Limit Unit of measure Stop slave ofﬂ ine

2. Probe conﬁ guration Main probe conﬁ g. Min value Max value Offset Limit probe conﬁ g. Min value Max value Offset

3. Operating options Operating options (1/2) Remote p. sensor Max. air press. Min air press. Max air press. offset Min air press. offset Operating options (2/2) Valve at end of line Alarm relay logic Prop. s. set point:

4. Special functions Special func. (1/3) Independent cleaning Enabled Period Duration Special func. (2/3) Washing Start washing Washing period Washing duration Enable ﬁ lling Filling duration Special func. (3/3) Select main screen display Language Show language choice at start-up?

5. Supervisor Supervisor conﬁ g.

ID number for BMS network) Com. speed Type of protocol Enable ON/OFF from supervisor

6. External alarms External alarms Water treatment Logic Compressor Logic Flow switch Logic

7. pLAN conﬁ g. pLAN conﬁ g. (1/2) pLAN Mode Press down arrow to set unit pLAN conﬁ g. (2/2) M1: S2: S3: S4: S5: S6: Alarm delay:

3. Maintenance (password 77)

1. Reset conf. Conﬁ guration Save conﬁ g. Load conﬁ g Default parameters Restore default parameters code: Type of humidiﬁ er

2. System info System info Boot (read only) Bios (read only) Code: Version: Date:

3. Manual procedure Manual controls (1/2) Manual procedure Air valve Water valve Drain valve Valve at end of line Production status Manual controls (1/2) Alarm relay Prop. output Prop. valve

4 Hour counter Hour counter

Hours of production Reset hours

5. Alarm log Alarm log Alarm (read only) Log deleted Time (read only) Date (read only)

ENG

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6. USER MENU

From the main screen press:

• PROG to access the main menu;

• ENTER to select and access the selected menu;

• UP/DOWN to move between the submenus;

• ENTER to enter the submenus

• ENTER to select the parameter and move between the parameters;

• UP/DOWN to modify the parameter;

• ENTER to conﬁ rm selected parameter and go to the next parameter;

• ESC to return to the previous menu.

User menu screens:

1. Alarm thresholds

2. Clock

3. Enable scheduler

4. Set scheduler

5. Weekly scheduler

6. Scheduled set point

6.1 Alarm thresholds

parameter par. name range default UOM

Main probe alarm thresholds

high alarm 0 to 100.0 100.0 %

low alarm 0 to 100.0 0.0 %

Limit probe alarm thresholds

high alarm 0 to 100.0 100.0 %

Alarm delay

0 to 999 1 min

6.2 Clock

Used to set the timed activation of the humidiﬁ er

parameter range

hour / min

0 to 23 / 0 to 59

day

1 to 31

month

1 to 12

year

00 to 99

format

dd/mm/yy - mm/dd/yy

weekday

Monday to Sunday

6.3 Enable scheduler

Enable control of the time bands and the set points

parameter enabled

Scheduler On/Off

YES / NO

variable set point

YES / NO

When the time bands are set, the display shows the symbol.

6.4 Set scheduler

Note: this screen is visible if “scheduler ON/OFF” has been enabled

(see the enable scheduler screen).

Setting of the intervals for the operation of the humidiﬁ er over one day (24h):

time band

ON OFF

P1 P1-1

09:00 13:00

P1-2

14:00 21:00

always ON

always OFF

Parameters P1 to P4 can be used set how many times atomised water production is enabled/disabled over a 24h period:

P1 Two daily ON time bands

0 24h

P1-1 P1-2

OFF OFF OFFON

P2 Individual ON time band

0 24h

OFF OFFON

P3 Always ON

0 24h

P4 Always OFF

0 24h

OFF

6.5 Weekly scheduler

Note: this screen is visible if “scheduler ON/OFF” has been enabled

(see the enable scheduler screen).

Setting of the weekly operation of the humidiﬁ er, using parameters P1 to P4 (conﬁ gured in the previous screen)

parameter type of time band

Monday

P1 to P4

Tuesday

P1 to P4

Wednesday

P1 to P4

Thursday

P1 to P4

Friday

P1 to P4

Saturday

P1 to P4

Sunday

P1 to P4

ENG

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6.6 Scheduled set points

Note: this screen is visible if “variable set point” has been enabled (see the enable scheduler screen).

Setting of diﬀ erent levels of set points throughout the day (24 h):

parameter

ON SETP.

hours %rH

00:00 0.0 to

Parameters Z1 to Z4 can be used to conﬁ gure up to four diﬀ erent temperature set points at diﬀ erent times of a day (parameters Z1, Z2, Z3, Z4).

Z1 Z2

20% U.R

50% U.R

30% U.R

Z3 Z4

0 24h

By setting the “daily” and “variable set point” time bands, atomised water production can be programmed according to the needs of the utility.

Note:

• during the “OFF” time band, the humidiﬁ er is NOT actually oﬀ , but

rather atomised water production is temporarily disabled, even when setting manually;

• the “daily” time bands have priority over the “variable set point” bands.

For example, setting P4 each Monday (humidiﬁ er oﬀ ), parameters Z1, Z2, Z3, Z4 (diﬀ erent set point values) will not be observed, as the humidiﬁ er is not programmed to operate on that day.

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From the main screen press:

• PRG to access the main menu;

• DOWN to move to the installer menu;

• ENTER to move to the password;

• UP/DOWN to enter the password “77“

• ENTER to access the selected menu;

• UP/DOWN to move between the submenus;

• ENTER to select the parameter and move between the parameters;

• UP/DOWN to modify the parameter;

• ENTER to conﬁ rm the selected parameter and go to the next parameter;

• ESC to return to the previous menu.

Installer menu screens:

1. Type of control

2. Probe conﬁ guration

3. Operating options

4. Special functions

5. Supervisor

6. External alarms

7. PLAN conﬁ guration

To navigate inside the screens:

• UP or DOWN to change the value (within the options/range),

• ENTER to conﬁ rm and move the cursor to the next value

• ESC to return to the installer menu.

7.1 Type of control

Settings: type of operation (ON/OFF or modulating), type of signal or probe, main probe, limit probe, unit of measure & stop slave oﬄ ine.

parameter options/range description

Type of operation

ON/OFF modulating

Type of signal or probe

External contact External proportional signal External proportional signal & limit probe Humidity probe Humidity probe & limit probe Temperature probe Temperature probe & limit probe

Main probe

select between:

NTC; 0-1 V; 2-10 V; 0-10 V (default);

0-20 mA; 4-20 mA; 0-135 ohm; 135-1k ohm

Limit probe

Unit of measure

°C - bar (default) °F - psi

Stop slave ofﬂ ine

YES default

if the pLAN network is oﬄ ine the slave units stop

NO if the pLAN network is oﬄ ine the slave units

continue

7.2 Probe con guration

Setting of the minimum value, maximum value and oﬀ set for the probes used.

parameter settings range default UOM

Main probe conﬁ g.

Min value 0 to 100 0 %rH °C/ °F Max value 0 to 100 100 %rH °C/ °F Oﬀ set -10 to 10 0 %rH °C/ °F

Limit probe conﬁ g.

Min value 0 to 100 0 %rH °C/ °F Max value 0 to 100 100 %rH °C/ °F Oﬀ set -10 to 10 0 %rH °C/ °F

7.3 Operating options

Operating options (1/2)

parameter description range default UOM

Remote p. sensor

pressure sensor at end of line for balancing compressed air system

YES/NO NO

max. air pressure

0 to 4 2.1 bar

min. air pressure

0 to 4 1.2 bar

max air press. offset

0 to 9.9 0

min air press. offset

0 to 9.9 0

Operating options (2/2)

parameter description range default UOM

valve at end of line

to allow automatic emptying and periodical washing of the water line

YES/NO YES

logic alarm relay

alarm relay status setting

NO/NC NO

proportional signal set point:

3 to 60 10 %

7.4 Special functions

Special functions: automatic cleaning (1/3)

Nozzle self-clean cycles to reduce the frequency of maintenance.

parameter range default UOM

Enabled

YES/NO YES

Period

0 to 999

30 min

Duration

60 to

999

160 s

Special functions: washing (2/3)

Automatic periodical washing of the water line to increase the hygiene of the installation.

parameter range default UOM

washing

manual/

automatic

man.

start washing

NO/YES NO

washing period

1 to 99 6 h

washing duration

0 to 15 10 min

enable ﬁ lling

NO/YES NO

ﬁ lling duration

1 to 1000 5 s

Special functions (3/3)

parameter range default UOM

select display on main screen

% signal;

Hours; %rH;

°C/°F

%rH

Language

Italian, English,

French,

German,

Spanish

Show language choice at startup?

YES/NO YES

7. INSTALLER MENU

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7.5 Supervisor

parameter range def. UOM

ID number for BMS network

0 to 200 1

communication speed

1200; 2400; 4800;

9600; 19200

19200 bps

type of protocol

Carel; Modbus®; Lon;

RS232; Winload

Carel

enable ON/OFF from supervisor

YES/NO NO

7.6 External alarms

parameter range def. UOM

water treatment

NO/YES NO

logic

NC/NO NC

compressor

NO/YES NO

logic

NC/NO NC

ﬂ ow switch

NO/YES NO

logic

NC/NO NC

7.7 pLAN con guration

pLAN con guration : mode (1/2)

parameter range def. UOM

pLAN master/master+slave

master

Mode multizone/single

point

multizone

pLAN con guration: units present and names (2/2)

parameter range def. UOM

M1(*)

YES/NO YES

S2/S3/S4/S5/S6(*)

YES/NO NO

Alarm delay

0 to 99

30 S

The MASTER and SLAVE units are named by default, however they can be renamed using the list of the characters shown below.

ABCDEF GHI J KL MNOP QR S T UV WX YZ0123456789 +-*:;,()/#%

To modify the character in the space selected, use UP and DOWN, to conﬁ rm the character and move to the next space press ENTER.

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Important: the operations described in this menu must only be

carried out by qualiﬁ ed personnel.

From the main screen press:

• PRG to access the main menu;

• DOWN to move to the maintenance menu;

• ENTER to move to the password;

• UP/DOWN to enter the password “77“

• ENTER to access the selected menu;

• UP or DOWN to move between the submenus;

• ENTER to select parameter and move between the parameters;

• UP/DOWN to modify the parameter;

• ENTER to conﬁ rm the selected parameter and go to the next

parameter;

• ESC to return to the previous menu.

Maintenance menu screens:

1. Reset conf.

2. System info

3. Manual procedure

4. Hour counter

5. Alarm log

8.1 Reset con gurations

Con guration

Functions:

• save the set conﬁ gurations,

• recall the saved conﬁ guration

parameter range default

save conﬁ gurations

YES/NO NO

load conﬁ guration

YES/NO NO

Default parameters

Functions:

• restore default parameters

• code

parameter range default

restore default parameters

YES/NO NO

code

display only

8.2 System information (read only)

information display

Boot

read only

Bios

read only

Code

read only

Version

read only

Date

read only

8.3 Manual procedure

Important: these operations must only be performed by qualiﬁ ed personnel, incorrect use may cause serious damage.

These procedures are used to manually test the main functions and operations of the humidiﬁ er.

Manual procedure (1/2)

parameter range default

manual procedure (*)

YES/NO NO

air valve

ON/OFF OFF

water valve

ON/OFF OFF

drain valve

ON/OFF OFF

valve at end of line

ON/OFF OFF

production status

ON/OFF OFF

Manual procedure (2/2)

parameter range default

alarm relay

YES/NO NO

proportional output

ON/OFF OFF

proportional valve

ON/OFF OFF

(*) To activate the individual manual procedures, ﬁ rst enable the manual procedure parameter.

8.4 Hour counter

parameter range/display

hours production

display

reset hours

YES/NO

8.5 Alarm log

Recorded trace of the alarms (events) that have been activated. The humidiﬁ er memory can record up to 200 events (complete with description and date, press DOWN to scroll the list).

parameter display

Alarm

event description

Log deleted

Time

hh:mm

Date

dd/mm/yy

8. MAINTENANCE MENU

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alarms displayed

meaning cause solution reset alarm

relay

action notes

high humidity humidity

outside of set limits

value measured by the probe greater than the humidity alarm threshold

check the set parameter manual inactive signal only on

low humidity humidity

outside of set limits

value measured by the probe less than the humidity alarm threshold

check the set parameter manual inactive signal only on

humidity probe broken or disconnected

main humidity probe disconnected or broken

check the connection & the operation of the probe

manual active stop

production

high humidity limit probe

limit humidity outside of set limits

value measured by the probe greater than the humidity alarm threshold

check the set parameter manual inactive signal only ﬂ ash can only be

reset switching the unit oﬀ from “set”, signalled only in sequence after other alarms but not when

forced. limit probe broken or disconnected

limit probe broken or disconnected

limit humidity probe disconnected or broken

check the connection & the operation of the probe

manual active stop

production

slave (2-3-4-5-6) unit oﬄ ine

slave unit not connected to the pLAN

pLAN network disconnected

check connection of pLAN cable to terminals on controller

manual active signal only on

master unit oﬄ ine

master unit not connected to the pLAN

pLAN network disconnected

check connection of pLAN cable to terminals on controller

manual active signal only on

low pressure alarm

insuﬃ cient air pressure

check air line pressure manual active stop

production

on for ON/OFF

units compressor alarm from air

compressor

compressor fault alarm

check air compressor manual active signal only on

ﬂ ow switch alarm from AHU

ﬂ ow switch

no air in AHU alarm

check AHU manual active signal only on

water treatment system

alarm from water treatment system

water treatment system fault alarm

check water treatment system manual active signal only on

pressure sensor faulty or disconnected

check pressure sensor manual active stop

production

on for proportional

units with air

pressure sensor pressure oﬀ scale

air pressure outside of set limits

insuﬃ cient air pressure

check air supply pressure manual active stop

production

on for proportional

units with air

pressure sensor clock fault clock error backup battery

completely discharged or generic clock fault

replace clock manual inactive signal only oﬀ

9. TABLE OF ALARMS

When an alarm is activated, the alarm button starts ﬂ ashing intermittently. In these conditions, pressing the alarm button once displays the type of alarm .

In the case of potentially dangerous alarms, the controller automatically stops production. For some alarm events, the alarm relay is also activated at the same time as the signal (see the table below).

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10. ADVANCED FUNCTIONS

10.1 Wiring diagrams

Wiring diagram for ON/OFF version, Master codes: MC***C*M**

PRESSOSTATO LINEA ARIA

PRESSURE SWITCH AIR LINE

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Wiring diagram for ON/OFF version, Slave codes: MC***C*S**

PRESSOSTATO LINEA ARIA

PRESSURE SWITCH AIR LINE

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Wiring diagram for modulating version, Master codes: MC***H*M**

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Wiring diagram for modulating version, Slave codes: MC***H*S**

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10.2 Operating principle

The humidiﬁ er controller - based on the input signal from a probe, an ON/OFF contact or external controller - activates the cabinet to start the production of atomised water (at maximum capacity), and stops the production when the set point is reached. As well as the room probe, the limit probe for humidity control is ﬁ tted in a signiﬁ cant point of the installation to avoid excessive condensation. Normally the humidity control probe is located in the ducts of the air handling unit.

ON/OFF operation

The activation logic is:

Request ON (contact closed)

Humidiﬁ er in production

No request OFF (contact open)

Humidiﬁ er in stand by (not in production)

Status of the outputs:

Humidiﬁ er in production:

• Water line active (NO drain solenoid valves active, NC ﬁ ll solenoid valve

active)

• Air line active (NC air line activation solenoid valve active)

Humidiﬁ er oﬀ (not in production):

• Water line inactive (NO drain solenoid valves deactivated, NC ﬁ ll

solenoid valve deactivated)

• Air line inactive (NC air line activation solenoid valve deactivated)

Operation in modulating versions

The humidiﬁ er controller - based on the input signal from a temperature or humidity probe, or external controller - activates and modulates the quantity of compressed air so as to achieve a humidiﬁ cation capacity proportional to the request from the external controller, or to the diﬀ erence between the desired value (set point) and the value measured by the probe.

In this case too, the limit probe is also used to measure the humidity in a signiﬁ cant point of the installation and avoid excessive condensation. In modulating operation, the system MANAGES a humidity set point, with an optional limit signal from the second probe, a temperature set point or a request signal (proportional).

Standard control of humidity production is performed using a proportional valve (AO2) controlled by a 0 to 10 V signal. The system behaves as follows:

Status of the outputs:

Humidiﬁ er in production:

• Water line active (NO drain solenoid valves active, NC ﬁ ll solenoid valve

active)

• Air line active (NC air line activation solenoid valve active, Proportional

valve controlled proportionally to required pressure)

Humidiﬁ cation not request:

• Water line inactive (NO drain solenoid valves deactivated, NC ﬁ ll

solenoid valve deactivated)

• Air line inactive (NC air line activation solenoid valve deactivated,

proportional valve closed)

The use of the request signal and the extent of control of the proportional air valve depends on the type of control selected. ON/OFF and modulating control share the ratio between the values, that is, the maximum signal applicable to the proportional solenoid valve corresponds to the rated production (Pnom).

10.3 Control principles

ON/OFF control from contact

The action is all or nothing, activated by an external contact that consequently determines the control set point and diﬀ erential. The external contact may be a humidistat, whose status determines the operation of the humidiﬁ er:

• contact closed: the humidiﬁ er produces atomised water if the remote

ON/OFF contact is also closed;

• contact open: production ends.

ON/OFF control with humidity probe

The action is all or nothing, activated based on the reading of the probe, production starts and reaches the maximum when the relative humidity is lower than the set point by the set diﬀ erential. To set the set point and diﬀ erential for the main control probe: SET menu. To check that the value measured by the probe is within certain preset values, two alarm thresholds can be set:

• high humidity alarm threshold;

• low humidity alarm threshold.

When these thresholds are exceeded, an alarm is activated, after a set delay.

Set point

%rH

Request

P. Ma x

100

ON/OFF control with temperature probe

The action is all or nothing, activated based on the reading of the probe, production starts and reaches the maximum when the temperature is lower than the set point by the diﬀ erential. To set the set point and diﬀ erential for the main control probe: SET menu. To check that the value measured by the probe is within certain preset values, two alarm thresholds can be set:

• high temperature alarm threshold;

• low temperature alarm threshold.

When these thresholds are exceeded, an alarm is activated, after a set delay.

Set point

°C/°F

Request

P. Ma x

100

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Proportional control

The production of atomised water is proportional to the value of a signal “Y” from an external device. The type of signal can be selected between the following: 0 to 1 Vdc, 0 to 10 Vdc, 2 to 10 Vdc, 0 to 20 mA, 4 to 20 mA, 0 to 135 Ohm, 135 to 1000 Ohm (installer menu > type of control > type of signal) The entire range is indicated as BP (proportional band). The maximum production of the humidiﬁ er, corresponding to the value maximum of the external signal, can be set from 50% t 100%. The minimum production corresponds to 10% (default, range 3-60%) of the external signal:

• if set point < 10%, hysteresis of 2%;

• if set point > 0 = 10%, hysteresis of 5%.

Set point

Request

P. Ma x

(50%) P. Min.

100

Segnale proporz.

Proportional control with limit probe

See “proportional control”, with the addition of a limit probe, generally installed in the air duct downstream of the humidiﬁ er. This type of control is used to reduce production if the relative humidity, downstream of the humidiﬁ er, is within the proportional band set for the limit probe. Production is stopped if the relative humidity, downstream of the humidiﬁ er, reaches the limit set point %rH2. To set the set point and diﬀ erential for the limit probe: “quick set menu”.

Di_Humid

Set point

%rH

Request

P. Ma x

P. Min.

100

Independent control with relative humidity probe

The production is related to the reading of the probe and increases as the relative humidity value read decreases. The production reaches the maximum when the relative humidity is lower than the set point (St) by a value at least equal to the diﬀ erential. The maximum production can be programmed between 50% and 100% of the rated value of the humidiﬁ er. To set the set point and diﬀ erential for the main control probe: “quick set menu”. The minimum production has an activation hysteresis, “hy”, equal to 0.2% rH To check that the relative humidity measured by the probe is within certain preset values, two alarm thresholds can be set in independent control:

• high humidity alarm threshold;

• low humidity alarm threshold.

When these thresholds are exceeded, an alarm is activated, after a set delay.

Di_Humid

Set point

%rH

Request

P. Ma x

P. Min.

100

Independent control with relative humidity probe and limit probe

See control with main probe, combined with a limit probe, installed in the air duct downstream of the humidiﬁ er. This type of control is used to reduce production if the relative humidity, downstream of the humidiﬁ er, is within the diﬀ erential band of the limit probe. Production is stopped if the relative humidity, downstream of the humidiﬁ er, reaches the limit set point %rH2.

Temperature control for cooling applications

When using the humidiﬁ er for adiabatic cooling, instead of the humidity probe in the room, a temperature probe is used. The production of atomised water is related to the temperature T read by the temperature probe (AO1), and increases as the distance from the set point St increases. Maximum production (Pmax), which occurs when the room temperature is greater than the set point by a value equal to the diﬀ erential (T di erential), can be set between 50% and 100% of rated production (Pnom). The activation hysteresis (default 0.2 °C) is indicated in Figure

4.2 as hy.

Di_Temp

Set point

°C/°F

Request

P. Ma x

P. Min.

100

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Temperature control with humidity limit probe

The production of atomised water depends on the reading of the temperature probe, with a second humidity probe (AO3) that limits production, so as to limit the humidity level in the cooled air. The limit probe has a set point (L set point), a diﬀ erential (L diﬀ .) and an activation hysteresis (0.2% rH). Production is the result of the diﬀ erence between the two readings.

10.4 Pressure control

Pressure control in the air line is fundamental as this is used to control production. Depending on the model, pressure may be controlled using:

• Manual regulating valve (ON/OFF operation)

• Manual regulating valve & pressure transducer in line (ON/OFF operation)

• Proportional valve (modulating operation)

• Proportional valve & pressure transducer (modulating operation)

MC models with ON/OFF controller

The pressure is controlled using the pressure gauges installed in the air line, which signal if the value is above or below the calibration of the manual pressure regulator. The correct operating pressure will be thus be controlled by the operator, when commissioning the installation, using the pressure gauges in the line and the manual regulating valve.

MC models with ON/OFF controller and pressure transducer (recommended)

The transducer is available as an optional component, upon request, including 10 m, 50 m or 100 m cable. The system works in “all or nothing” mode and displays the signal of the pressure transducer, providing indications to the operator on the calibration of the air line using the manual regulating valve.

MC models with control by proportional valve

The system provides a signal to the proportional valve to modulate the pressure in the air line, from a minimum to a maximum, depending on the request from the humidity probe or the external controller. The minimum and maximum pressure values are set using the related parameters. If there is signiﬁ cant pressure drop along the line - measured by the operator using a pressure gauge installed at the end of the line - a parameter (see installer menu > operating options (1/2) can be used to set a pressure oﬀ set as compensation. The pressure oﬀ set is summed to the signal sent to the proportional valve to compensate for the pressure drop.

MC models with control by proportional valve & pressure transducer (recommended)

The transducer is available as an optional component supplied upon request by Carel SpA, the kit includes:

• transducer

• connector

• 10 m, 50 m or 100 m cable.

In this case, as well as control with the proportional valve, the pressure transducer installed at the end of the line measures the air pressure and tells the electronic controller (which manages the proportional valve) to automatically compensate for pressure drop along the line. In this way, the system can supply the required pressure and automatically manage any pressure drop in the line.

10.5 Drain/ ll

Important: this function requires the installation of a CAREL NO drain solenoid valve at the end of the water line, available as an option.

For hygiene reasons, when the system is not operating the water line is emptied to avoid bacterial formation inside. This is done using the normally-open drain solenoid valves located inside the cabinet and at the end of the line. The ﬁ ll operation is performed as follows, starting from empty:

• the NC water ﬁ ll solenoid valve in the cabinet is activated (opened);

• the NO drain solenoid valve in the cabinet is activated (closed);

• the NO solenoid valve at the end of the line is deactivated (opened).

The duration of the ﬁ ll cycle can be set by parameter and depends on the length of the line. During the ﬁ lling phase, the air line is deactivated. At the end of the cycle, the NO drain solenoid valve at the end of the line will be closed and the air line will be activated so as to resume production. The function can be activated by parameter, and when deactivated, the status is as illustrated in chapters 3 and 4.

10.6 Periodical washing of the water line

Function required for hygiene/health reasons when the humidiﬁ er is not operating. To activate this function: installer menu > special functions > special functions (2/3), can be performed automatically by time or manually. The washing procedure is similar to the ﬁ ll cycle described above, starting from empty

• the NC water ﬁ ll solenoid valve in the cabinet is activated (opened);

• the NO drain solenoid valve in the cabinet is activated (closed);

• the NO solenoid valve at the end of the line is deactivated (opened).

The duration of the wash cycle is longer than the ﬁ ll cycle and, in this case too, depends on the length of the line. The duration and the frequency of the wash cycle can be set by parameter. During the washing phase, the air line is deactivated

10.7 Automatic cleaning of the atomising heads

To activate this function: installer menu > special functions > special functions (1/3); can be performed:

• During a production cycle

• At the end of a production cycle

Cleaning involves deactivating the water  ll, keeping the air line active (at 100% in the case of modulating operation, or simply activated for ON/OFF operation), activating (opening) the NO water drain solenoid valves at the end of the line and in the cabinet.

The duration of the operation can be set by user parameter, in addition the frequency during the production cycle can also be set, as well as whether or not to perform the operation at the end of the production cycle.

10.8 Pressure overboost

To ensure the correct opening and modulation of the atomising heads, at the start of each production cycle, these are supplied with compressed air only, at a pressure of:

• 2.1 bars for ON/OFF versions.

• 3 bars for proportional versions.

During this phase, the water line is not activated. This function is not managed by parameter.

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Notes:

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11. GENERAL CHARACTERISTICS OF THE DISTRIBUTION SYSTEM

11.1 Atomising head

The atomising heads are available in AISI 316 stainless steel with 5 diﬀ erent ﬂ ow-rates, yet all with the same dimensions and weights. Each atomising head has a marking on the nozzle indicating the model and thus the ﬂ ow-rate.

Marking Code Capacity

A MCAA200000 2.7 l/h B MCAB200000 4.0 l/h C MCAC200000 5.4 l/h D MCAD200000 6.8 l/h E MCAE200000 10 l/h

11.2 Assembly kit

This is a series of components designed to make the assembly of the atomising heads on the air-water lines simpler and faster; it can be used for both normal water and demineralised water (aggressive).

Only one model is available:

• MCK1AW0000 for assembly of the heads on the lines in the room or

in the duct.

Kit MCK1AW0000

1. 1/4” FF elbow connector

2. 1/4” H43 MF column

3. 1/4” nipple

4. 1/4” MF 2-way valve

5. 1/4” PVSF 2-way valve

6. 1/4” 180° M connector

7. B TFN nylon tube dia. 6/8 mm

8. 1/4” FF elbow connector dia. 6/8 mm

9. 1/4” FF hose coupling”

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12.1 Sizing an MC system

When sizing an MC system, several factors must be considered: air ﬂ ows, ﬂ ow speed, presence of cooling coils, dimensions of the room where the humidiﬁ er will be installed. For correct sizing, given the relative complexity of the factors involved, the applications should be designed using the documents provided by CAREL.

To calculate the humidiﬁ cation requirements of a certain space, a series of factors need to be considered:

• volume of the local (m3);

• current conditions of the room: temperature (°C) and relative humidity

(% rH);

• desired conditions in the room: temperature (°C) and relative humidity

(% rH);

• characteristics of the materials inside (quantity, hygroscopic factor,

number of people);

• time required to reach steady operation;

• inlet of outside air (inﬁ ltration, occasional opening of doors or

windows);

• air change (m3/h);

• outside design conditions: temperature (°C) and humidity (% rH);

• condensation on the cooling coil.

Note: If there is no fresh air inlet, once the required relative humidity

value is reach the humidiﬁ cation system will not need to work much to maintain the humidity level. Consequently, to save running costs when high capacities are required, check the time required to reach steady operating conditions.

12.2 Sizing the compressor

Careful attention needs to be paid to sizing the compressor. The air consumption is determined by the capacity of the installation and not by the maximum ﬂ ow-rate of the cabinet. Consequently, the number of atomising heads in the installation and their ﬂ ow-rate need to be considered. The air ﬂ ow-rate of each head may have the following values:

MCAA2 MCAB2 MCAC2 MCAD2 MCAE2

Nm3/h 3.43 5.08 6.86 8.64 12.7 CFM 2 3 4 5 7.5

The air consumption for all heads is equal to:

- 0.41 m3/h per litre of water at an operating pressure of 2.1 bars;

- 1.27 Nm3/h per litre of water at atmospheric pressure;

- 0.75 CFM per litre of water at atmospheric pressure.

The table below describes the speciﬁ c consumption for each individual head in Normal m3/h and CFM (Cubic Feet per Minute), referred to atmospheric pressure:

Calculation example: Installation of 18 MCAC2 heads supplied by a 230 l/h cabinet.

V = C

head

x n = 6.86x18 = 123.5 Nm3/h = 2058 l/m

(referred to the rated data of the compressor)

where: V = volume of air taken in by the compressor or introduced into the room by the installation (Nm3/h) C

head

= air consumption of each head (Nm3/h)

n = number of heads

Note: In order to guarantee the right air ﬂ ow-rate in all conditions, the size should be overrated by 10%.

12.3 Sizing air/water lines between cabinet & distribution system

The pipes or hoses carrying air and water to the atomising heads must be made from copper or plastic. DO NOT USE GALVANISED STEEL PIPES as these may release impurities that block or damage the heads. When supplying the cabinet with demineralised water, only use plastic or stainless steel pipes. If the cabinet is supplied with demineralised water (aggressive), Teﬂ on or liquid Teﬂ on must be used as the sealant.

In alternative to the above, polypropylene hoses can be used, which allow faster and simpler connections by welding.

To determine the diameters of the air/water outlet lines, refer to the tables below. Make sure that the inside diameter of the pipes/hoses selected is as described in the table under the item “ID”.

Always make sure that the rated pressure of the pipes/hoses is suitable for the operating pressure of the installation, in any case PN8 or higher diameter pipes/hoses are recommended.

12. DESIGNING A SYSTEM

system  ow-rate l/h

type of heads line length

A B C D E 5 m 10 m 25 m 50 m

no. heads installed per

type

air water air water air water air water

ID mm ID mm ID mm ID mm ID mm ID mm ID mm ID mm

30 11 8 6 4 3 15 12 20 14 20 15 25 18

60 22 15 11 9 6 20 12 25 14 30 15 30 18

120 44 30 22 18 12 30 12 30 14 35 15 40 18

230 85 58 43 34 23 35 12 40 14 45 15 55 18

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system  ow-rate lb/h

type of heads line length

A B C D E 16 feet 32 feet 80 feet 160 feet

no. heads installed per type

air water air water air water air water

ID mm ID mm ID mm ID mm ID mm ID mm ID mm ID mm

65 11 8 6 4 3 5/8 1/2 3/4 5/8 3/4 5/8 1 3/4

130 22 15 11 9 6 3/4 1/2 1 5/8 1 1/4 5/8 1 1/4 3/4

260 44 30 22 18 12 1 1/4 1/2 1 1/4 5/8 1 3/8 5/8 1 1/2 3/4

500 85 58 43 34 23 1 3/8 1/2 1 1/2 5/8 1 3/4 5/8 2 1/4 3/4

Note: If the air line is more than 50 metres log, size the line so that

the pressure drop does not exceed 0.2 bar. Try to limit the number of connections in the air and water lines to the minimum possible. The use of elbow or “T” connectors and reducers/adapters will increase the pressure drop in the lines. The diameters shown in the tables have been selected considering the use of a pair of connectors in each line, if the number of connectors doubles choose the next largest diameter.

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13. INSTRUCTIONS FOR INSTALLATION IN ROOMS

13.1 Tips for correct installation

Note: see Chapter 2 for the connection of the atomising heads.

The air line also acts as the support for all the heads. The water line must always be lower than the atomising heads to ensure emptying and drying when the installation is oﬀ . Size the water and air lines as shown in the table in paragraph 4.3

13.2 Assembling the atomising head

For each atomising head, a kit for assembly in the room is available that makes installation simpler and faster. The assembly kit can be used both for normal water and for aggressive water. The drawing (paragraph 3.2) illustrates how to ﬁ t the kit.

• All the atomising heads must be installed at the same height to avoid

variations in pressure that would make the sprays of atomised water less uniform.

• The assembly kit allows the head to be turned vertically so as to aim

the spray as desired.

• A readily accessible ball valve should be installed at the end of each

line for cleaning (bleeding) the lines when ﬁ rst starting and at the start of each season.

• The water lines must not have “pockets” along the path so that the

installation can be drained completely by gravity when stopped.

• Make sure not to reverse the water/air inlets on the atomising heads;

the air inlet is always marked by a label showing “AIR”.

13.3 Positioning the humidity probes

The cabinet control system can be connected to:

• signal from an external controller.

• ambient humidity probe.

• signal from external controller plus limit probe.

• two humidity probes: ambient plus limit

• one temperature probe and one limit probe.

If installing humidity and temperature probes:

• The ambient humidity control probe must be located inside the

return air duct. This sensor can also be positioned in the room being humidiﬁ ed. Make sure, however, that the place where it is installed is away from ﬂ ows of air that are hotter or colder than the environment, or is not in contact with perimeter walls.

• The temperature probe must follow the same rules as described

above for the humidity probe.

• The high humidity limit probe should be located downstream of the

atomisation manifold in a position where it cannot be wet by the jet of atomised water (e.g. after the cooling coil, or after a droplet separator, or near the fan).

13.4 Important rules to be followed

There are a number of important rules to be observed when installing an MC humidiﬁ cation system:

1. The jet of atomised water must not come into contact with any

object along its path so as to avoid condensation and thus dripping. Any obstacles in the trajectory of the jet of water can be avoided by suitably aiming the atomising heads. Table shows the length and the maximum diameter of the jet in relation to the humidity in the room. The heads must also be installed so as to avoid two separate sprays from overlapping. It is recommended to install them, inside the area being humidiﬁ ed, as high as possible, without however wetting the ceiling.

Luce/Light

sì/yes

head  ow-rate minimum installation height max spray diameter visible spray distance <50% rH visible spray distance >50% rH

2.7 l/h 4 m 0.75 m 3.00 m 4.55 m

4.0 l/h 4 m 0.75 m 3.35 m 4.90 m

5.4 l/h 4.6 m 0.90 m 3.65 m 5.20 m

6.8 l/h 6.1 m 1.20 m 4.00 m 6.10 m

10.0 l/h 9.4 m 1.50 m 4.60 m 7.00 m

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2. The air/water lines must not have variations of height.

3. If the ﬁ lling and washing functions are featured, install the NO

drain solenoid valve supplied as an option at the end of the line. The drain hose connected downstream of the solenoid valve must have a diameter that is greater than or equal to diameter of the line upstream. If this is not installed, ﬁ t an easily accessible ball valve for cleaning (bleeding) the line when commissioning and restarting each season.

4. At the end of the air line, an easily accessible ball valve should be

ﬁ tted for cleaning (bleeding) the line when commissioning and restarting each season.

5. To control the pressure in the air line, use one of the following devices,

installed at the end of the line:

• Pressure gauge (supplied as an option)

• Pressure transducer (supplied as an option)

• With the devices listed above, depending on the type of cabinet

used, refer to the following:

for ON/OFF cabinets:

• With a pressure gauge installed at the end of the line, the pressure

drop in the line can be displayed and, if necessary, the pressure

increased to 2.1 bars using the manual pressure regulator located

inside the cabinet.

• With the pressure transducer, the pressure at the end of the line

can be shown on the controller display and, if necessary, increased

using the manual pressure regulator.

for cabinets with modulating control:

• With a pressure gauge installed at the end of the line, the pressure

at the end of the line can be read and, if necessary, increased using

the corresponding parameter on the electronic controller.

• With the pressure transducer, the cabinet automatically controls

the pressure in the installation to the optimum value so as to

compensate for any pressure drop in the line.

6. The cabinet drain line must be connected directly to a drain cycle at

a height of at least 50 mm below the level of the heads.

7. The position of the cabinet must be selected so as to guarantee

the shortest path to the lines. If the lines are very long (>50 m), the cabinet should be positioned in the centre of the line, so as to balance the pressure.

8. The atomising heads must be distributed so as to uniformly cover the

entire area involved. The control cabinet must always be located in a central position in reference to the layout of the heads.

9. The humidity sensor must be positioned where possible in a central

area of the space being humidiﬁ ed, in a point in which there are no ﬂ ows of humidiﬁ ed air and atomised water from the atomising heads. In addition, avoid ﬁ tting the humidity sensor on a perimeter wall of the building, as the temperature of the wall may be aﬀ ected by the outside temperature and thus inﬂ uence the reading.

10. Shielded cables should be used to connect the control cabinet to the

following devices:

• humidity, limit and temperature probes, air line pressure sensor

(optional)

• water line drain solenoid valve (optional).

Avoid running these cables near other power cables (electric motors, contactors, high voltage wires, etc...)

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14. INSTRUCTIONS FOR INSTALLATION IN DUCTS

For duct applications, the solution with two probes is recommended:

• humidity probe or signal from external controller

• limit probe

this solution can be used indiﬀ erently for both types of cabinet:

• ON/OFF

• Modulating

The modulating cabinet is recommended for this type of application. By modulating the capacity of the atomisation system, the maximum possible production can be delivered without ever reaching saturation conditions inside of the duct. The atomisation manifold (Fig. 11) is made up of an air line and a water line located below. At the end of the lines, two ball valves should be installed for bleeding the lines.

SAN PA1

1 O 6 8 x 6 DIN 74324 AIM 29 --

SAN PA1

1 O 6 8 x 6 DIN 74324 AIM 29 --

SAN PA1

1 O 6 8 x 6 DIN 74324 AIM 29 --

SAN PA1

1 O 6 8 x 6

DIN 74324 AIM 29 --

air ow

duct

front view

duct

front view

water line

air line

cabinet air line water line

230 l/h 22 mm (1/2”G) 22 mm (1/2”G) 60 l/h 14 mm (1/2”G) 14 mm (1/2”G)

14.1 Positioning the atomisation manifold

Figure 12 shows the possible positions for the atomised water manifold. The control cabinet must where possible be installed near the manifold with the atomising heads. Critical measurements for the assembly of the manifold in the duct:

1. Distance of the heads from the surfaces of the duct::

The maximum distance H reached by the jets of atomised water is shown in the under table. The distance H is very important for preventing the jet of atomised water from wetting the duct; this is the most typical installation the manifold (Fig. 14.a).

air ow

Fig. 14.a

Maximum distance H in mm reached by the jet

air speed in m/s

2.7 l/h 4.0 l/h 5.4 l/h 6.8 l/h 10 l/h distance H in mm

2.0 660 737 914 1219 1792

3.0 610 686 838 1092 1605

4.0 559 610 737 965 1419

5.0 508 559 660 838 1232

6.0 457 508 559 711 1045

7.5 406 432 483 584 859

10.0 356 381 406 432 635

If the height available is not suﬃ cient, the manifold can be installed as shown in Fig. 14.b. This type of installation is used to humidify in smaller ducts. Any losses due to condensation and removed by the droplet separator will however be greater.

air ow

Fig. 14.b

Never ﬁ t the heads against the ﬂ ow If, based on the top table, the height of the duct is not suﬃ cient, one solution may be to ﬁ t the manifold outside the duct, with the ends of the nozzles spraying inside, as can be seen in Fig. 14.c. This saves around 20 cm.

air ow

Fig. 14.c

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14.2 Important rules to be followed

1. The minimum distance between two adjacent heads must never be

less than 100 mm. This is also the minimum distance between the heads at the end and the side of the duct.

2. To determine the distance between heads, divide the width of the

duct by the number of heads plus one. If the distance is less than 100mm, more manifolds should be used, and if possible, larger capacity heads.

3. If the height of the duct (D) is greater than::

D = 2 x H + 100 mm

(where H is the maximum distance in mm reached by the jet sprayed by the heads to the top of the duct, as in Table 4), then the manifold can be placed in the centre of the duct with the heads facing alternately up and down.

4. The minimum height of the duct (M) to be able to install the

distribution manifold with a 90° jet is equal to:

M = H + 180 mm

If this space is not available, then the heads must be installed outside of the duct with the jet spraying inside (Fig. 14.c) or lower capacity heads used.

5. The jet of atomised water must never come into contact with

obstacles (wall reinforcement bars) before total evaporation (free path of evaporation - PL).

6. Never ﬁ t the heads in the opposite direction to the air ﬂ ow.

7. If the ﬁ lling and washing functions are featured, install the NO

8. At the end of the air line, an easily accessible ball valve should be

ﬁ tted for cleaning (bleeding) the line when commissioning and restarting each season.

9. To control the pressure in the air line, use one of the following devices,

installed at the end of the line: Pressure gauge (supplied as an option) Pressure transducer (supplied as an option) With the devices listed above, depending on the type of cabinet used, refer to the following:

for ON/OFF cabinets:

• With a pressure gauge installed at the end of the line, the pressure

drop in the line can be displayed and, if necessary, the pressure increased to 2.1 bars using the manual pressure regulator located inside the cabinet.

• With the pressure transducer, the pressure at the end of the line

can be shown on the controller display and, if necessary, increased using the manual pressure regulator.

for cabinets with modulating control:

• With a pressure gauge installed at the end of the line, the pressure

at the end of the line can be read and, if necessary, increased using the corresponding parameter on the electronic controller.

• With the pressure transducer, the cabinet automatically controls

the pressure in the installation to the optimum value so as to compensate for any pressure drop in the line.

14.3 Positioning the humidity probes

If installing humidity and temperature probes:

• The ambient humidity control probe must be located inside the

• The temperature probe must follow the same rules as described above

for the humidity probe.

• The high humidity limit probe should be located downstream of the

atomisation manifold in a position where it cannot be wet by the jet of atomised water (e.g. after the cooling coil, or after a droplet separator, or near the fan).

14.4 Manifolds for installation in ducts

Special manifold kits are available for installations in ducts, sized according to the number of atomising heads required and the dimensions of the AHU/ducts.

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There are fundamentally three components that require adjustments:

• atomising heads;

• air and water lines;

• electronic controller.

Heads

The screw on the rear of the head is used to adjust the atomised water ﬂ ow-rate. This is calibrated in the factory to the reference values (2.1 bars air, 0.35 bars water) for the design ﬂ ow-rate, which may be 2.7; 4.0; 5.4; 6.8 or 10 l/h. If the spray is visibly diﬀ erent in intensity from the other similar heads, or the environmental conditions mean higher or lower absorption, the screw can be adjusted to increase or decrease the water ﬂ ow-rate. This operation should only be performed by authorised personnel (CAREL service centres).

Air and water line

The air and water pressure in the respective lines must have the following values:

• Cabinet air inlet: 5 to 7 bars

• Cabinet air outlet: 2.1 bars

• Cabinet water inlet: 3 to 7 bars

• Water outlet:

• 0.35 bars if the heads and cabinet are at the same height;

• (0.35+Hx0.1) bars if the heads and cabinet are at diﬀ erent heights.

H is the height between the heads and the cabinet water line in metres.

Note: maximum height between the cabinet and the water line is 20 m.

The MC modulating humidiﬁ cation system can modulate the production of atomised water by adjusting the air pressure at the heads, allowing a proportional variation in ﬂ ow-rate.

• The minimum pressure is set as default to 1.2 bars.

• The maximum pressure is set as default to 2.1 bars

These values can be modiﬁ ed so as to optimise:

• the minimum pressure according to the type of atomising head used

• the maximum pressure according to the pressure drop in the line (also

see chapters 5.3; 6.2). in the case of modulating units with pressure transducer at the end of the air line, the maximum pressure is controlled automatically (the transducer is supplied by CAREL as an option).

15. MAIN ADJUSTMENTS

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16. MAINTENANCE

16.1 Maintenance procedures

Even if the MC humidiﬁ cation system does not generally require special

maintenance, preventive maintenance should be performed regularly,

annually or before starting each season. The richer the water in salts or

impurities, the more frequently checks are required.

Devices requiring checks:

Compressor: follow the manufacturer’s instructions

Atomising heads: once a year remove and clean the nozzle,

lubricate the

o-ring with silicone grease and in case change them. Air and water line: once a year the air and water lines should be bled to remove any sediments, traces of oil and dirt. To do this, follow the system start-up procedure. Pressure regulators and solenoid valves: once a year open and clean to remove any debris and deposits. pCO3 electronic controller + pGD terminal and humidity probes: once a year check the condition of the probes and recalibrate if necessary. Do not use compressed air or solvents to clean the probe sensor.

16.2 Kits & optional accessories for the air/ water line (see chap. 2)

NO solenoid valve at end of line for NW (normal water) M C K D V W L 0 0 0 NO solenoid valve at end of line for AW (aggressive water) M C K D V W L 0 0 1

pressure transducer l=10 m MCKPT01000 pressure transducer l=50 m MCKPT05000 pressure transducer l=100 m MCKPT10000

air outlet pressure gauge 0 to 4 bars MCKMA04000 water outlet pressure gauge AW 0 to 2.5 bars M C K M W 0 2 5 0 1

UV lamp sanitising kit MCKSUV0000 UV lamp MCKUV00000

5” water ﬁ lter container MC F I LWAT 0 5 5 water ﬁ lter cartridge MCC05PP005 1/2” air ﬁ lter MC F I LA I R 0 1 3/8” oil ﬁ lter for air MC F I LO I L 0 1

humidity probes for ducts 10 to 90% rH D P D C 112000 humidity probes for ducts 0 to 100% rH D P D C 212000 ambient humidity probes 10 to 90% rH D P W C 112000 temperature-humidity probes for industrial environments -10 to 70 °C/ 0 to 100% rH D P P C 212000 temperature-humidity probes for industrial environments 0 to 50 °C / 10 to 90% rH D P P C 112000

16.3 Kits & optional accessories for the atomising heads (see chap. 11)

Atomising head assembly kit MCK1AW0000

Atomising head mod. A 2.7 l/h MCAA200000 Atomising head mod. B 4.0 l/h MCAB200000 Atomising head mod. C 5.4 l/h MCAC200000 Atomising head mod. D 6.8 l/h MCAD200000 Atomising head mod. E 10 l/h MCAE200000

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16.4 Spare parts for air/water line (see paragraph 1.4)

line drawing code & description exploded drawing component code component description n.

M C K A 0 6 0 D 0 0

ON/OFF air line 60 l/h

36421

M C K M A 1 2 0 0 0

pressure gauge 0 to 12 bars 1

M C K M N F D 0 0 0

manifold 2

M C K M R 0 A 0 6 0

manual air pressure regulator 60 l/h

M C K A 0 6 0 D U 0

ON/OFF air line 60 l/h UL

M C K F S V B C 0 0

NC air solenoid valve 60 l/h/water NW

M C K M A 0 4 0 0 0

air outlet pressure gauge 0 to 4 bars

M C K P S 0 0 0 0 0

pressure switch 6

M C K A 2 3 0 D 0 0

ON/OFF air line 230 l/h

34 62152

M C K M A 1 2 0 0 0

pressure gauge 0 to 12 bars 1

M C K M N F D 0 0 0

manifold 2

M C K M R 0 A 2 3 0

manual air pressure regulator 230 l/h

M C K A 2 3 0 D U 0

ON/OFF air line 230 l/h UL

M C K F S V A C 0 0

NC air solenoid valve 230 l/h 4

M C K M N F D 0 0 0

manifold 2

M C K P S 0 0 0 0 0

pressure switch 6

M C K A 0 6 0 H 0 0

modulating air line 60 l/h

1 3

M C K M A 1 2 0 0 0

pressure gauge 0 to 12 bars 1

M C K M N F D 0 0 0

manifold 2

M C K A M V A 0 0 0

modulating valve 3

M C K A 0 6 0 H U 0

modulating air line 60 l/h UL

M C K F S V B C 0 0

NC air solenoid valve 60 l/h/water NW

M C K M N F D 0 0 0

manifold 2

M C K A 2 3 0 H 0 0

modulating air line 230 l/h

1 2 345

M C K M A 1 2 0 0 0

pressure gauge 0 to 12 bars 1

M C K M N F D 0 0 0

manifold 2

M C K A M V A 0 0 0

modulating valve 3

M C K A 2 3 0 H U 0

modulating air line 230 l/h UL

M C K F S V A C 0 0

NC air solenoid valve 230 l/h

M C K M N F D 0 0 0

manifold 2

M C K W 0 0 0 0 0 0

ON/OFF normal water line 230 l/h

2345

M C K M A 1 2 0 0 0

pressure gauge 0 to 12 bars 1

M C K M N F D 0 0 0

manifold 2

M C K M R 0 W 0 0 0

manual water pressure regulator

M C K W 0 0 0 0 U 0

ON/OFF normal water line 230 l/h UL

M C K F S V B C 0 0

NC air solenoid valve 60 l/h/water NW

M C K M W 0 2 5 0 0

water outlet pressure gauge NW 0 to 2.5 bars

M C K D S V W C 0 0

NO solenoid water valve NW

M C K W 0 0 0 0 0 1

ON/OFF aggressive water line 230 l/h

236415

M C K M W 1 0 0 0 1

inlet pressure gauge AW 0 to 10 bars

M C K M N F D 0 0 0

manifold 2

M C K M R 0 W 0 0 0

manual water pressure regulator

M C K W 0 0 0 0 U 1

ON/OFF aggressive water line 230 l/h UL

M C K F S V W C 0 1

NC water solenoid valve AW 4

M C K M W 0 2 5 0 1

water outlet pressure gauge AW 0 to 2.5 bars

M C K D S V W C 0 1

NO solenoid water valve AW 6

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NC air solenoid valve 60 l/h/water for NW M C K F S V B C 0 0 NC air solenoid valve 230 L/h MC K F S V AC 0 0 NO water solenoid valve for NW MC K D S VWC 0 0 NC water solenoid valve for AW MC K F S VWC0 1 NO water solenoid valve for AW MC KD S VWC 0 1

pressure gauge 0 to 12 bars MCKMA12000 inlet pressure gauge AW 0 to 10 bars MCKMW10001 air outlet pressure gauge 0 to 4 bars MCKMA04000 water outlet pressure gauge NW 0 to 2.5 bars M C K M W 0 2 5 0 0 water outlet pressure gauge AW 0 to 2.5 bars M C K M W 0 2 5 0 1

manual air pressure regulator 60 l/h MCKMR0A060 manual air pressure regulator 230 l/h MCKMR0A23 0 manual water pressure regulator MCKMR 0W0 0 0 modulating valve MC K AMV A 0 0 0

16.5 Pre-programmed pCO3 controllers

pre-programmed pCO3 controller, 60 l/h ON/OFF Master CE M C K C 0 6 C D M 0 pre-programmed pCO3 controller, 60 l/h ON/OFF Master UL M C K C 0 6 C 1 M 0 pre-programmed pCO3 controller, 60 l/h ON/OFF Slave CE M C K C 0 6 C D S 0 pre-programmed pCO3 controller, 60 l/h ON/OFF Slave UL M C K C 0 6 C 1 S 0 pre-programmed pCO3 controller, 230 l/h ON/OFF Master CE M C K C 2 3 C D M 0 pre-programmed pCO3 controller, 230 l/h ON/OFF Master UL M C K C 2 3 C 1 M 0 pre-programmed pCO3 controller, 230 l/h ON/OFF Slave CE M C K C 2 3 C D S 0 pre-programmed pCO3 controller, 230 l/h ON/OFF Slave UL M C K C 2 3 C 1 S 0 pre-programmed pCO

controller, 60 l/h modulating Master CE M C K C 0 6 H D M 0

pre-programmed pCO

controller, 60 l/h modulating Master UL M C K C 0 6 H 1 M 0

pre-programmed pCO

controller, 60 l/h modulating Slave CE M C K C 0 6 H D S 0

pre-programmed pCO

controller, 60 l/h modulating Slave UL M C K C 0 6 H 1 S 0 pre-programmed pCO3 controller, 230 l/h modulating Master CE M C K C 2 3 H D M 0 pre-programmed pCO3 controller, 230 l/h modulating Master UL M C K C 2 3 H 1 M 0 pre-programmed pCO3 controller, 230 l/h modulating Slave CE M C K C 2 3 H D S 0 pre-programmed pCO3 controller, 230 l/h modulating Slave UL M C K C 2 3 H 1 S 0

16.6 Electrical panel kit and spare parts (see paragraph 1.4)

manifold MC KMN F D 0 0 0 pressure switch MCKPS00000 power supply 110/230 Vac 12 Vdc 0.5 A M C K A L 00000 transformer MCKTR00000 fuses MC K F U S E 0 0 0 modulating valve regulator MC K A R V A 0 0 0 pGD0 kit for setting pLAN address PGD0002F0K

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17. TROUBLESHOOTING

17.1 Troubleshooting table

line problem cause solution

1 alarm status displayed C1 active alarm S1 check the alarm in “table of alarms” 2 unit powered and enabled, the switch

on the front is in position “1” yet the humidiﬁ er won’t start.

C1 no power to the cabinet S1 check that there is power at terminals LN C2 the fuses are blown S2 check the fuses

4 saturation and condensation inside the

duct caused by the fan stopping.

C1 failure to detect the ﬂ ow switch alarm S1 make sure the ﬂ ow switch is connected to

terminals ID6-COM on the unit

S2 check the correct conﬁ guration of the ﬂ ow

switch alarm contact: installer menu>external alarms.

5 the air outlet pressure doesn’t reach 2.1

bars

C1 compressor undersized S1 check the ﬂ ow-rate of the compressor in

relation to the to the consumption expected for the installation

C2 for proportional units, without the transducer at

the end of the line: maximum limit pressure too low.

S2 check the maximum pressure set: installer

menu>operating options

C3 for ON/OFF units, pressure regulator set too low. S3 check the calibration of the pressure regulator

6 in proportional systems: the air outlet

pressure swings

C1 air line long and made from deformable material S1 decrease inlet pressure to the cabinet while

ensuring the pressure at the heads reaches 2.1 bars

7 air line active yet the heads don’t atomise

water.

C1 the air outlet pressure is too low S2.1 ON/OFF unit: check the inlet air pressure and

the air pressure regulator

S2.2 proportional unit, without pressure transducer

end of the line: check air pressure limit, installer

menu>operating options C2 water line NC solenoid valve not powered S2 check 24 V power to the solenoid valve. C3 water line NO solenoid valve not powered S3 check 24 V power to the solenoid valve. C4 water pressure regulator closed (fully unscrewed) S4 adjust the pressure regulator so the outlet

pressure is 0.35 bars C5 regulator not adjusted according to the height of

the heads

S5 adjust the pressure regulator so the outlet

pressure is 0.35 bars plus 0.1 bars for each

metre of diﬀ erence in height between the

cabinet and distribution line C6 water pressure regulator dirty S6 remove the water pressure regulator and clean

any impurities.

8 water pressure reaches high values and is

not controlled.

C1 water pressure regulator dirty S1 remove the water pressure regulator and clean

any impurities.

9 for duct installations: low absorption

of atomised water and area under the atomisation heads wet

C1 air speed in the duct too high in relation to the

free path between the atomising heads and droplet separator.

S1 check the sizing of the installation

C2 overlapping sprays of atomised water or contact

between the spray of atomised water and the walls of the duct

S2 optimise the positioning of the heads

10 water leaks from the NO solenoid valve in

the cabinet or at the end of the line

C1 impurities in the solenoid valve that prevent

complete closing.

S1 remove the solenoid valve, remove the coil,

unscrew the sleeve, remove the impurities,

clean the body and sleeve and reassemble.

11 with the unit oﬀ or in stand-by with the

NC solenoid valve closed, water leaks

C1 impurities in the solenoid valve that prevent

complete closing.

S1 remove the solenoid valve, remove the coil,

unscrew the sleeve, remove the impurities,

clean the body and sleeve and reassemble.

12 atomising heads with abnormal ﬂ ow,

adjusting the calibration screw brings no improvement.

C1 atomising heads dirty S1 remove the head and clean. C2 air and water pressure at the heads outside the

limits

S2 check the air and water pressure in the cabinet

and at the end of the line C3 oil in the air line S3 check the oil separator ﬁ lter upstream of the

cabinet.

13 the heads produce a jet of water when

there is no air

C1 air/water connections reversed S1 reverse the connection observing the markings

on the heads

14 the ambient humidity stabilises at values

below the set point

C1 the capacity of the installation is not suﬃ cient to

meet the requirements

S1.1 review the sizing of the installation S2.1 adjust the heads to increase production

increase the number of the heads in relation

to the maximum ﬂ ow-rate of the cabinet. See

points 8 and 9.

CAREL reserves the right to modify the features of its products without prior notice.

Notes:

CAREL INDUSTRIES HQs

Via dell’Industria, 11 - 35020 Brugine - Padova (Italy) Tel. (+39) 049.9716611 - Fax (+39) 049.9716600 e-mail: carel@carel.com - www.carel.com

Agenzia / Agency:

“MCmultizone” +030221981 - rel. 2.3 - 09.12.2014

Carel MCmultizone User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual