Carel heaterSteam User manual

Technology & Evolution
heaterSteam
User manual

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We can assure you that a thorough reading of this manual will guarantee
correct installation and safe use of the product described.

IMPORTANT WARNINGS
BEFORE INSTALLING OR HANDLING THE APPLIANCE PLEASE CAREFULLY READ AND FOLLOW THE
INSTRUCTIONS AND SAFETY STANDARDS DESCRIBED IN THIS MANUAL AND ILLUSTRATED ON THE
LABELS ATTACHED TO THE MACHINE.
This humidifier produces non-pressurised steam using heating elements immersed in the water contained in the cylinder-boiler
(hereafter cylinder); the steam thus produced is used to humidify environments or industrial processes, through special
distributors.
The quality of the water used does not affect the evaporation process, and as a result the appliance can be supplied with
untreated water, as long as such water is fit for drinking, demineralised or softened (see Supply water characteristics);
the evaporated water is automatically returned using a refill valve.
To achieve uniform distribution of the heat flow, the heating elements, which are electrically insulated from the water, are
covered in an aluminium casting, and are also available with a special non-stick coating to prevent and aid the removal of
lime-scaling.
This appliance has been designed exclusively to directly humidify rooms or ducts, through distributors. It has been developed
for this purpose, as long as: the installation, use and maintenance of the unit are carried out according to the instructions
contained in this manual and on the labels applied, internally and externally, to the unit.
The environmental conditions and the voltage of the power supply must correspond to those specified.
All other uses and modifications made to the device which are not authorised by the manufacturer are considered
incorrect.
Liability for injury or damage caused by the incorrect use of the device lies exclusively with the user.
Please note that the machine contains powered electrical devices and hot surfaces.
All service and/or maintenance operations must be performed by specialist and qualified personnel who are aware of
the necessary precautions.
Disconnect the machine from the mains power supply before accessing any internal parts.
The local safety standards in force must be applied in all cases.
Approval: the quality and safety of Carel products are guaranteed by the company's ISO 9001 certified design and production
system, as well as the mark.

CONTENTS
1. THE MODELS......................................................................................................................................................................... 3
1.1 The accessories...................................................................................................................................................................... 3
2. DESCRIPTION OF THE MAIN COMPONENTS AND FUNCTIONS ................................................................................ 4
2.1 Level control.......................................................................................................................................................................... 5
2.1.1 Working level switch......................................................................................................................................................... 5
2.1.2 Safety level switch............................................................................................................................................................. 5
2.2 Overfill device....................................................................................................................................................................... 5
2.3 Regulation of steam production.............................................................................................................................................. 5
2.4 Measurement of the conductivity of the supply water - alarm thresholds................................................................................. 5
2.5 Automatic draining................................................................................................................................................................ 5
2.6 Foam elimination procedure................................................................................................................................................... 5
2.7 Safety thermostat ................................................................................................................................................................... 5
2.8 Autotest procedure................................................................................................................................................................. 6
2.9 Measurement of the water temperature and pre-heating (not available in the version with type C control module)..................6
2.10 Dehumidification request signal (not available in the version with type C control module) ..................................................... 6
2.11 Deposit detector for the heating elements (optional in the version with type C control module, std. in the versions with type H
or T control module) ........................................................................................................................................................................... 6
3. REGULATION PRINCIPLES................................................................................................................................................ 7
3.1 ON/OFF regulation (control module C).................................................................................................................................. 7
3.2 Modulating regulation (control module H).............................................................................................................................. 7
3.2.1 ON/OFF regulation (parameter A0=0)................................................................................................................................ 7
3.2.2 Autonomous regulation with relative humidity transducer (parameter A0=2)...................................................................... 7
3.2.3 Autonomous regulation with ambient relative humidity transducer and supply humidity limiting transducer (param. A0=3)8
3.2.4 Application for steam baths (type T control module) .......................................................................................................... 8
3.3 Setting the alarm thresholds (type H or T control module)...................................................................................................... 8
4. MOUNTING THE UNIT......................................................................................................................................................... 9
4.1 Receipt and storage................................................................................................................................................................ 9
4.2 Dimensions and weights ........................................................................................................................................................ 9
4.3 Removing and replacing the front casing................................................................................................................................ 9
5. POSITIONING THE UNIT................................................................................................................................................... 10
5.1 Fastening............................................................................................................................................................................. 10
6. HYDRAULIC CONNECTIONS............................................................................................................................................ 11
6.1 Supply water characteristics................................................................................................................................................. 11
6.2 Characteristics of the drain water......................................................................................................................................... 11
6.3 Technical specifications....................................................................................................................................................... 11
6.3.1 Table of technical specifications....................................................................................................................................... 12
6.3.2 Diagram of hydraulic connections .................................................................................................................................... 12
6.4 Checks................................................................................................................................................................................. 12
7. ELECTRICAL CONNECTIONS .......................................................................................................................................... 13
7.1 Power supply voltages.......................................................................................................................................................... 13
7.2 Checking the voltage of the auxiliary circuit transformer...................................................................................................... 14
7.3 Main control board............................................................................................................................................................... 14
7.4 Description of the terminal block and connections (functions and electrical specifications)............................................................ 14
7.5 Auxiliary connections........................................................................................................................................................... 15
7.5.1 Type C control module with ON/OFF action.................................................................................................................... 15
7.5.2 Type H control module with modulating action ................................................................................................................ 15
7.5.3 Control module T for steam baths with modulating action................................................................................................ 16
7.6 Other auxiliary contacts ....................................................................................................................................................... 16
7.6.1 Alarm contact .................................................................................................................................................................. 16
7.6.2 Dehumidification contact ................................................................................................................................................. 16
7.6.3 Remote terminal / supervisory system.............................................................................................................................. 16
7.6.4 Using different brand probes............................................................................................................................................ 17
7.7 Checks................................................................................................................................................................................. 17
7.8 Wiring diagrams for the connection of the elements at the headers ....................................................................................... 18
7.9 Single-phase wiring diagram for 2-4kg/h humidifiers with type C control module................................................................. 19
7.10 Single-phase wiring diagram for 2-4kg/h humidifiers with type H or T control module......................................................... 20
7.11 Single-phase wiring diagram for 6kg/h humidifiers with type C control module.................................................................... 21
7.12 Single-phase wiring diagram for 6kg/h humidifiers with type H or T control module ............................................................ 22
7.13 Three-phase wiring diagram for humidifiers with type C control module.............................................................................. 23
7.14 Three-phase wiring diagram for humidifiers with type H or T control module....................................................................... 24
8. Steam distribution.................................................................................................................................................................. 25
8.1 Ambient steam distribution: ventilated steam distributors..................................................................................................... 25
8.2 Steam distribution in cold rooms.......................................................................................................................................... 25
8.3 Ducted steamdistribution:linear and concentrated jet distributors (OEM)................................................................................... 25
8.4 Concentrated jet steam distribution (OEM).......................................................................................................................... 26
8.5 Positioning linear distributors in the air duct........................................................................................................................ 26

8.6 Installation of the steam conveyance tubing.......................................................................................................................... 27
8.7 Installing the condensation return tubing.............................................................................................................................. 28
8.8 Checks................................................................................................................................................................................. 28
9. START-UP............................................................................................................................................................................. 29
9.1 Preliminary checks............................................................................................................................................................... 29
9.2 Removing the element centring spring (only for three-phase models).................................................................................... 29
9.3 Start-up................................................................................................................................................................................ 29
10. THE HUMIDIFIER CONTROLLER................................................................................................................................... 30
10.1 Type C control module, with indication LEDs and ON/OFF action....................................................................................... 30
10.1.1 Front panel ...................................................................................................................................................................... 30
10.1.2 Start-up sequence............................................................................................................................................................. 30
10.1.3 Display and control.......................................................................................................................................................... 30
10.1.4 Alarm indications ............................................................................................................................................................ 30
10.1.5 Manual drain command ................................................................................................................................................... 31
10.1.6 Setting the steam production............................................................................................................................................ 31
10.2 Type H or T control module, numeric LED display, modulating action ................................................................................. 31
10.2.1 Front panel ...................................................................................................................................................................... 31
10.2.2 Start-up sequence............................................................................................................................................................. 31
10.2.3 Display............................................................................................................................................................................ 32
10.2.4 Changing the Set Point..................................................................................................................................................... 32
10.2.5 Alarm indication.............................................................................................................................................................. 32
10.2.6 Manual drain command ................................................................................................................................................... 32
11. READING ANDPROGRAMMING THEPARAMETERSOF THETYPEH ORTCONTROLMODULE............................................... 33
11.1 Reading and programming the Set Point............................................................................................................................... 33
11.2 Reading and programming the regulation parameters - reading the measurements ................................................................ 33
11.3 Reading and programming the configuration parameters....................................................................................................... 35
11.4 Validity of the modifications to the parameters..................................................................................................................... 37
11.5 Recalling the default parameters (factory settings)................................................................................................................ 37
Resetting the hour counter................................................................................................................................................................. 37
11.6 Displaying and modifying the unit of measure...................................................................................................................... 37
12. THE REMOTE CONTROL (OPTIONAL ACCESSORY)................................................................................................. 38
Description of the remote control....................................................................................................................................................... 38
Buttons for activating/deactivating the remote control..................................................................................................................... 38
Buttons for modifying the main parameters (direct access buttons).................................................................................................. 38
Buttons for the remote control of the control module keypad ........................................................................................................... 39
Programming from the remote control ............................................................................................................................................... 39
Enabling the control for receiving without requiring access code (C2=0)......................................................................................... 39
Enabling the control for receiving with access code required (C2≠0)............................................................................................... 39
Reading the measurements.............................................................................................................................................................. 39
Modifying the main parameters (with specific button)..................................................................................................................... 39
Modifying the main parameters (without specific button)................................................................................................................ 40
Exiting the programming phase......................................................................................................................................................... 40
Table of remote control technical specifications................................................................................................................................. 40
13. SHUTTING DOWN THE UNIT ........................................................................................................................................... 41
14. MAINTENANCE AND SPARE PARTS ............................................................................................................................... 42
14.1 Maintenance of the cylinder-boiler....................................................................................................................................... 42
14.2 Maintenance of the other hydraulic components ................................................................................................................... 46
Replacing the components................................................................................................................................................................. 47
Non-stick film................................................................................................................................................................................. 47
Elements ........................................................................................................................................................................................ 47
Safety thermostat............................................................................................................................................................................ 47
PTC overtemperature sensor (optional in the version with type C control module, std. in the version with type H or T control module)47
NTC temperature sensor (version with type H or T control module only)......................................................................................... 48
Auxiliary circuit fuses..................................................................................................................................................................... 48
Solid state relays (version with type H or T control module only).................................................................................................... 48
Coolingfanandcircuitbreaker(versionwithtypeHorTcontrolmoduleonly).............................................................................................. 48
14.3 Spare parts........................................................................................................................................................................... 49
14.4 Disposal of the parts of the humidifier.................................................................................................................................. 49
15. ALARMS AND TROUBLESHOOTING .............................................................................................................................. 50
15.1 Alarm summary table........................................................................................................................................................... 50
15.2 Troubleshooting................................................................................................................................................................... 53
16. HUMIDIFIER TECHNICAL SPECIFICATIONS............................................................................................................... 54
16.1 Guarantee on materials ........................................................................................................................................................ 55

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eaterSteam
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1. THE MODELS
The code designating the model of electrical heater humidifier is made up of 10 characters, with the following meaning:
U R X X X X X X 0 0
Example: the code UR010CL100 identifies a electrical heater humidifier (UR) with:
• nominal steam production of 10kg/h (010);
• ON/OFF control module (C);
• 400Vac, three-phase power supply (L);
• full optional version (1).
1.1 The accessories
Table 1.1.1 lists the accessories fitted on the humidifiers, in the various configurations.
type of control
module C(ON/OFF) H(modulating) T(for steam baths)
options 0: base 1: full optional 0: base 1: full optional 0: base 1: full optional
water temperature probe and pre-heater -- -- incl. incl. incl. incl.
thermal lining outside of cylinder extra incl. option incl. option incl.
deposit detection device -- incl. incl. incl. incl. incl.
elements coated with non-stick film extra incl. option incl. option incl.
lime collection film extra incl. option incl. option incl.
Key: --: not available; incl.: accessory included; option: extra option
Tab. 1.1.1
type of control
C = ON/OFF
H = modulating
T = for steam baths
thi
familyID prefix
rated instantaneous steam
production in kg/h options
0 = Base version
1 = Full optional version
not used
type - power supply
(V - type)
C = 200 - 1∼N
U = 208 - 1∼N
D = 230 - 1∼N
J = 200 - 3∼
W = 208 - 3∼
K = 230 - 3∼
L = 400 - 3∼
M = 460 - 3∼

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eaterSteam
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2. DESCRIPTION OF THE MAIN COMPONENTS AND FUNCTIONS
Ventilatore(nei modeli in cui è previsto) = Fan (in
models where featured)
Klixon (termoprotettore) = Klixon (circuit
breaker - in models where featured)
Relè stato solido = Solid-state relay (in models
where featured)
Teleruttore = Remote control switch
Scheda relè = Relay board
Portafusibili = Fuse holder
Morsettiera cavi di alimentazione = Power cable
terminal block
Fermacavo antistrappo = Tear-proof cable clamp
Pressacavo per cavi di potenza = Fairlead for
power cables
Pressacavo per cavi sonde esterne = Fairlead for
external probe cables
Modulo di controllo = Control module
Elettrovalvola di drenaggio = Drain electrovalve
Elettrovalvola di alimento = Fill electrovalve
Cilindro = Cylinder
Controllo di livello = Level control
Leva di bloccaggio = Locking lever
Termostato di sicurezza = Safety thermostat
Fig. 2.1
n. description
1 fill electrovalve
2 flow limiter
3 supply tubing
4 refill tubing
5 overflow pipe
6 connection tube
7 level gauge housing
8 level control - level switches
9 equaliser tube
10 conductivity measurement electrodes
11 fill tank
12 fill diaphragm
13 overfill diaphragm
14 high level electrodes
15 steam outlet tube
16 cylinder cover
17 safety thermostat
18 cylinder thermal lining (optional)
19 water temperature sensor (optional)
20 overheating sensors (optional)
21 lime collection film
22 heating elements
23 cylinder housing
24 bottom filter
25 drain electrovalve
Tab. 2.1
1
8
7
9
5
6
121314
4
3
16
10
11
15
23
17
21
22
19
18
24
20
25
2

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2.1 Level control
Steam is produced with the heating elements completely immersed in the water, the level of which is controlled by a sensor
made up of two independent and overlapping float switches, that is the working level switch and safety level switch.
The level control, housed in a transparent case to allow visual inspection, communicates with the cylinder through special
tubing; a second tube, attached to the cylinder cover , equalises the pressure.
2.1.1 Working level switch
This switch, which activates the fill electrovalve, introduces water through the special tubing into the fill tank, from where,
dropping from a fill diaphragm, it refills the level inside the cylinder; the fill electrovalve is fitted with a flow limiter,
maintaining the flow basically constant on changes in mains pressure.
2.1.2 Safety level switch
This switch shuts off power to the elements, activating the alarm in the case where the level is insufficient.
2.2 Overfill device
This is a device used to avoid water exiting the cylinder over the safety level, due for example to the malfunctioning of the
control module (for more details, see THE HUMIDIFIER CONTROLLER) or to leaking from the fill electrovalve.
The fill tank is fitted with an overfill diaphragm which deviates the excess inlet water, discharging it through special tubing.
The overfill diaphragm is lower than the fill diaphragm to avoid back flow through the supply tube.
2.3 Regulation of steam production
Steam production can be regulated either:
• By step, alternating steam production with standby using a humidistat or external contact; steam production can be
regulated in four steps with pseudo-modulation from 30% to 100% of nominal power, cyclically activating the remote-
control switch (humidifier with type C control module).
• By continuous modulation from 0% to 100% of nominal power, using solid state relays (SSR); the regulation logic is PWM
(variation of the length of the impulse) with programmable base times (humidifier with type H or T control module).
2.4 Measurement of the conductivity of the supply water - alarm thresholds
To optimise the functionality of the humidifier by suitably portioning the automatic draining cycles (see Automatic draining),
when the fill electrovalve is opened the conductivity of the inlet water is measured using the special electrodes in the fill tank.
Two high conductivity thresholds can be set to activate respectively a pre-alarm and an alarm (with the shut-down of the
appliance) when these thresholds are exceeded for at least 60 minutes, or instantly if the value measured is greater than three
times the set value.
2.5 Automatic draining
The automatic draining function is handled by the control module. Part of the water contained in the cylinder is drained
automatically, being replaced by fresh water to prevent an excessive salt concentration following the evaporation process.
The drain electrovalve is opened for a pre-set time at intervals which vary automatically as a function of the steam production
and the content of solids dissolved in the supply water, detected using the conductivity measuring electrodes.
Irrespective of the concentration of salt in the supply water, at least one draining cycle is performed within a maximum
interval based on the quantity of steam produced; this is also true for demineralised supply water.
2.6 Foam elimination procedure
The level of water inside the cylinder is maintained by the level control at around 10-12cm from the top of the cylinder, and
thus, when the high level electrodes are wet, an anomalous situation arises, generally caused by the presence of foam. In this
case a drain procedure is activated, and is repeated until the phenomenon desists or, in the event of multiple activation, until
the appliance is shut-down and an alarm state is signalled.
2.7 Safety thermostat
The mechanical safety thermostat with manual reset intervenes in the event of overheating, caused by a lack of water inside the
cylinder due to the malfunctioning of the minimum level control. This deactivates the relay that controls the power supplied to
the elements, and places the humidifier in an alarm state.

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2.8 Autotest procedure
Each time the humidifier is started (switched from the OFF to the ON position), an autotest procedure is performed, including
checks on the operation of the level control, to test the regular functioning of the appliance.
On start-up and on each draining cycle the operation of the level control is automatically checked by opening the fill
electrovalve until the activation of the working level switch and, successively, opening the drain electrovalve until the
activation of both level switches, and finally, restoring the correct level; in the event of a failed test or irregular timing the
remote-control switch is automatically deactivated the alarm activated.
2.9 Measurement of the water temperature and pre-heating (not available in the
version with type C control module)
The control module measures, using an NTC sensor, the temperature of the water, and can be programmed to activate the pre-
heating function near the value set for the start of humidification; in this way, steam production occurs more quickly.
2.10 Dehumidification request signal (not available in the version with type C control
module)
If activated, this function closes the relay contact when the relative humidity measured by the transducer connected to the
control module exceeds the set threshold.
This signal can be used to activate an external dehumidification device.
2.11 Deposit detector for the heating elements (optional in the version with type C
control module, standard in the versions with type H or T control module)
This patented device measures the resistance of the PTC temperature sensors inserted in the aluminium castings of the heating
elements. In the event of overheating (caused by excessive lime deposits on the surface of the elements, or by low water level
not detected by the level control), the overheating alarm is activated. In units with more than one element, the PTC
temperature sensors are connected in series.

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eaterSteam
Carel code +030221761 preliminary version
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3. REGULATION PRINCIPLES
The range of humidifiers includes the following regulation possibilities.
3.1 ON/OFF regulation
(control module C)
The action in this case is all or nothing, activated by an external contact which thus determines the Set Point and the
regulation differential (or hysteresis).
Average steam production can be adjusted using a pseudo-modulating action, through the cyclical activation of the remote-
control switch with a fractional actuation period (operation) that can be programmed in four steps: 30%, 50%, 75% or 100% of
the total time (this mode can not be applied in severe operating conditions and without consequences on the noise level, caused
by the frequent activation of the remote-control switch).
3.2 Modulating regulation (control module H)
The appliance is fitted with solid-state relays and thus steam production can be regulated continuously as a function of the
required quantity, in one of the following modes.
3.2.1 ON/OFF regulation
(parameter A0=0)
As for the type C control module (see ON/OFF regulation (type C control module)).
Slave regulation, with signal emitted from an external regulator (parameter A0=1)
Steam production is proportional to the value of an
external signal Y, (selected by programming one of the
following standards: 0÷1Vdc; 0÷10Vdc; 2÷10Vdc;
0÷20mA; 4÷20mA) the entire range of which is indicated
by BP (proportional band).
The maximum production Pmax, corresponding to the
maximum value of the external signal Y, can be
programmed between 10%and 100%of the nominal
value of the humidifier.
The minimum production Pmin is fixed at 10% of the
nominal value, with an activation hysteresis provided by
the value hy, equal to 2% of the entire range BP of the
external signal Y.
If enabled, the pre-heating function overlaps the
regulation diagram, and is activated when the external
signal Yis lower than the activation point for steam
production by a quantity b2.
3.2.2 Autonomous regulation with relative humidity transducer (parameter A0=2)
Steam production is linked to the measurement of % rH,
performed by the relative humidity transducer connected
to the regulator, and increases as the distance from the Set
Point St increases.
The maximum production P0, which occurs when the relative
humidity is less that the Set Point by a value P1, can be
programmed between 10% and 100% of the nominal
value of the humidifier.
The minimum production Pmin is fixed at 10% of the
nominal value, with an activation hysteresis provided by
the value hy, equal to 10% of P1.
The pre-heating function, if enabled, overlaps the regulation
diagram and is activated when the relative humidity % rH,
measured by the transducer, is higher than St by a
programmable quantity b2.
The dehumidification function, if enabled, overlaps the regulation diagram and is
activated when the relative humidity % rH, transmitted by the transducer, is
higher than St by a programmable quantity P5+P6; the hysteresis of the step, also
programmable, is equal to P6.
Fig. 3.2.2.1
Fig. 3.2.3.1
Y
1 Vdc
10 Vdc
10 Vdc
20 mA
20 mA
PRODUZIONE
DI VAPORE
hy
active
inactivate
PRE-HEATING
b2
Pmax
hy
Pmin
steam production
hy
OFF
0 Vdc
0 Vdc
2 Vdc
0 mA
4 mA
BP
OFF ON
ON
steam production
P0
ON
h
y
% rH
h
y
P5
act
i
ve
i
nact
i
vate
PRE
-
HEATING
b2
act
i
ve
inactivate
DEH
U
MIDIFIER
Pmin STEAM
PR
O
D
UC
TI
ON
ON OFF
P6
OFF ON
ON OFF
St
P1

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eaterSteam
Carel code +030221761 preliminary version
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To check that the relative humidity measured by the transducer is within the pre-
set values, the control module with autonomous regulation allows two alarm
thresholds to be programmed:
• high relative humidity alarm threshold P2;
• low relative humidity alarm threshold P3.
When these thresholds are exceeded, after a programmable delay P4, an alarm
state is activated, with the closing of the contact of the corresponding relay on
the main control board.
With autonomous regulation (parameter A0=2) it is also possible to have an ON/OFF action, as represented in the graph, by
disabling power modulation (setting parameter b0=0).
The pre-heating and/or dehumidification, if enabled, remain unchanged.
3.2.3 Autonomous regulation with ambient relative humidity transducer and supply humidity
limiting transducer (parameter A0=3)
In this case too the regulator modulates steam production as a function
of the measurement % rH performed by the main relative humidity
transducer, however, in addition, its entity is limited if the relative
humidity % rH2 measured by a second compensation transducer
placed in the humidifier air inlet duct exceeds the maximum desired
value.
This limiting occurs by giving the command to decrease steam
production proportionally to the difference between the measurement %
rH2 of the supply relative humidity and the programmable threshold
P7.
The compensation probe has its own Set Point P7 and differential P8,
based on which the limit of production is calculated. If the production
required by the main transducer is greater than the limit, production
will be equal to the limit itself.
To prevent the relative humidity measured by the transducer in the
humidifier air inlet duct exceeding a value considered as excessive, the
control module with autonomous regulation and second transducer
connected allows a high supply relative humidity alarm threshold P9, to
be programmed. If this threshold is exceeded, after a programmable delay P4, an alarm state is activated, with closing of the
contact of the corresponding relay on the main control board.
3.2.4 Application for steam baths (type T control module)
In applications for steam baths, where the regulation probe measures temperature rather than humidity, the same
considerations are valid as for the type H control module with modulating action and autonomous regulation.
Recommended transducer: SSTOOB/P40 or ASET030001.
3.3 Setting the alarm thresholds (type H or T control module)
The control module panel allows the setting of limit thresholds for the activation of the alarm in the event where these are
exceeded.
These alarm thresholds can be programmed using the following regulation parameters:
• P2: high relative humidity alarm threshold, measured by the ambient probe;
• P3: low relative humidity alarm threshold, measured by the ambient probe;
• P4: alarm signalling delay (to prevent false signals);
• P9: high relative humidity alarm threshold, measured by the supply probe (for ducted humidification).
The parameters P2, P3, P4 are programmable only when A0=2 or 3; the parameter P9 is programmable only when
A0=3.
Furthermore, the control module allows the signalling of excessive conductivity (and thus salt concentration) of the supply
water, but only as a default setting.
WARNING: the parameter A0 and the functional alarm parameters Px and b0 are set in the factory (default values valid for
normal applications). Nonetheless, these can be modified by the user, following the instructions contained in: Reading and
programming the parameters for the type H or T control module.
Pnom
OFFON
% rH
Steam
p
roduction
P1 St
STEAM
PRODUCTION
Fig. 3.2.3.2
10
10% P8
Supply
probe
(% rH2)
Limit
Of production %
P8 P7
P0
Fig. 3.2.4.1

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eaterSteam
Carel code +030221761 preliminary version
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rel. 2.0
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03/09/99
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4. MOUNTING THE UNIT
4.1 Receipt and storage
Check the integrity of the machine upon delivery and immediately notify the shipping agent, in writing, of all and any damage
which may be the result of careless or incorrect transport. Move the machine to the place of installation before removing it
from its packaging, holding the neck only from below the base. Open the cardboard box, remove the padding material and then
the machine, keeping it vertical at all times; remove the protective bag only just prior to installation.
4.2 Dimensions and weights
*: in operating conditions, filled with water
4.3 Removing and replacing the front casing
To remove the front casing of the humidifier, proceed as follows:
1. turn the oval badge with the Carel logo 90°, until the ground screw below
can be seen;
2. remove the screw, using a screwdriver;
3. grip the casing by the sides and lift it around 2 centimetres, releasing the
contours from the raised edges on the cover and the base of the structure;
4. remove the casing by pulling it forward.
To close the appliance, proceed as follows:
1. turn the red oval plate with the Carel logo so that the fastening hole below is
visible;
2. slide the casing onto the structure, keeping it in a slightly raised position,
until it rests on the edges of the rear piece; then move it downwards slotting
the upper and lower contours into the edges of the cover and the base of the
structure respectively; check that the fastening hole below the logo is in line
with the threaded bush attached to the structure;
3. fasten the ground screw using a screwdriver;
4. place (rotate) the oval plate with the Carel logo in the closed position.
B
A
C
Fig. 4.2.1
models
reference UR002 UR004 UR006 UR010 UR020 UR030
A 370 370 370 370
dimensions (mm) B 280 280 280 280
C 575 575 710 710
packaged 26 26 31 31
weight (kg) empty 21 21 26 26
installed * 27 27 35 35
Tab. 4.2.1
Fig. 4.3.1

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5. POSITIONING THE UNIT
The humidifier must be positioned and fastened by qualified technical personnel, following the instructions
listed herein.
Choose the best location for the installation of the steam distributor, that is the
position which minimises the length of the steam tubing or, in the case of direct
ambient humidification using a ventilated distributor, the central point of the
space being humidified (see STEAM DISTRIBUTION). The unit is designed to
be mounted to a wall which must be able to support its weight in operating
conditions (see Dimensions and weights).
The metal casing of the humidifier heats up during operation, and the rear part
resting against the wall may reach temperatures above 60°C; thus ensure that this
does not cause any problems. Make sure the machine is level, respecting the
minimum distances indicated in the drawing, to allow the necessary maintenance
operations.
WARNING: ensure that the cooling fan outlet grid is not blocked or covered.
5.1 Fastening
The appliance must be fastened to the wall using three screws: two upper screws,
to fasten the support bracket, and a lower, central screw, for anchoring. Use the following distances for the drilling template.
Fasten the bracket supplied with the humidifier to the wall, checking that it is horizontal
using a spirit level; if it is mounted to a brick wall, the plastic wall plugs (Ø 8mm) and screws
(Ø 5mm x L = 50mm) supplied can be used.
Fig. 5.1.2
Hang the appliance on the bracket using the contour on the upper edge of the rear of the unit.
Finally, fasten the appliance to the wall using the hole in the centre rear of the base. This can be easily reached from the
bottom.
≥
300
≥700
≥
200
≥
400
≥
200
< 0,5°
g
ri
g
lia
Fig. 5.1
X
=
=
Y
Fig. 5.1.1
models
UR002
UR004 UR006 UR010 UR020 UR030
X (mm) 220 220
Y (mm) 520 654
Z (mm) 280 280
Tab. 5.1.1
30
Z
30

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6. HYDRAULIC CONNECTIONS
The hydraulic connections for the supply and the draining of the unit must be made by specialist and
qualified personnel, who are capable of performing the work correctly and according to local standards.
Before making the connections, ensure that the machine is disconnected from the mains power.
6.1 Supply water characteristics
The supply water for the electrical heater humidifier not must be corrosive, must not emit bad odours, must not contain too
much lime to avoid excessive deposits.
The water, supplied from mains drinking water or demineralised water, must have the following characteristics:
pressure between 1 and 8 bar chloride content < 50mg/l hardness not greater than 40°fH (equal to 400 ppm as
temperature between 1 and 50°C low chlorine content CaCO3)
phosphate content < 5mg/l low CO2 content absence of organic compounds
Tab. 6.1.1
Note that treating the water with softeners or polyphosphates does not decrease the quantity of dissolved salts, and can lead to
the formation of foam and hence irregular operation.
Not recommended:
1. the use of well water, industrial water or water from cooling circuits and, in general, water which may be chemically or
bacteriologically contaminated;
2. the addition to the water of disinfectants or anticorrosion compounds, as these may cause irritation.
Note: no relationship can be proven between water hardness and conductivity; nonetheless, as an indication only, water with a
hardness of 40°fH should have an approximate conductivity of around 900-1000µS/cm at 200C.
6.2 Characteristics of the drain water
Inside the humidifier water boils and steam is produced, without the addition of any kind of substance. The drain water,
therefore, contains the same substances as those dissolved in the supply water, yet in a greater proportion, depending on the
concentration in the supply water and the set drain cycles; it can also reach a temperature of 100°C. Not being toxic, it can be
drained into the backwater collection system. The drain tubing, as well as being resistant to high temperatures, must also
guarantee the correct downflow of the water; a downward slope of at least 5° is therefore recommended.
6.3 Technical specifications
The installation of the humidifier requires connection to the supply and drain water tubing.
The connection of the supply water can be made using rigid or
flexible tubing with a minimum recommended internal diameter
of 6mm, fitted with a shut-off tap to allow the appliance to be
disconnected during maintenance operations.
To simplify installation it is recommended to use Carel flexible
tubing with an internal diameter of 6mm and an external
diameter of 8mm (code 1312350APN) and the rotating ¾"G
straight (code 9995727ACA) or elbow connector (code
9995728ACA), available upon request.
It is recommended to install a mechanical filter to trap any
solid impurities.
The drain water connection is made using a section of rubber or
plastic tubing resistant to temperatures of 100 °C, with a recommended internal diameter of 36 mm.
This section of tubing must be fastened using metal clamps:
• above, onto the appliance outlet pipe coupling;
• below, onto the rigid tubing, with a minimum slope of 5°.
Fig. 6.3.1

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6.3.1 Table of technical specifications
models
technical specifications UR002 UR004 UR006 UR010 UR020 UR030
maximum instantaneous flow rate for supply water (l/min.) 0.6 0.6 1.2 1.2
supply water connection G¾"M G¾"M G¾"M G¾"M
supply tubing minimum recommended internal diameter (mm) 6 6 6 6
maximum instantaneous flow rate for drain water (l/min) 5 5 5 5
drain water connection external diameter (mm) 40 40 40 40
drain tubing recommended internal diameter (mm) 36 36 36 36
Tab. 6.3.1
6.3.2 Diagram of hydraulic connections
Fig. 6.3.2.1
IMPORTANT WARNING: the discharge tubing must be free, without back-pressure and with a drain trap
immediately downstream from the connection to the humidifier.
6.4 Checks
The following conditions represent correct hydraulic connection:
• disconnection of the supply water line using a shut-off tap;
• presence of a mechanical filter in the supply water line;
• water temperature and pressure within the acceptable values;
• drain tubing resistant to temperatures of 100°C;
• drain tubing minimum internal diameter of 36 mm;
• minimum slope of drain tubing greater than or equal to 5°.
IMPORTANT WARNING: on completion of the installation procedure, drain the supply tubing for around 30 minutes
by passing water directly through the tubing and without introducing it into the humidifier. This will allow the
elimination of any scoria and processing residues which may cause the formation of foam during the boiling process.
Power supply
filter
min 5°
drain ta
p

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eaterSteam
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7. ELECTRICAL CONNECTIONS
The electrical connections must be made by specialist and qualified personnel, who are capable of
performing the work correctly and according to local standards. Before making the connections, ensure
that the machine is disconnected from the mains power.
Check that the voltage of the appliance's power supply corresponds to the value indicated on the data plate inside the electrical
panel . Introduce the power and ground connection cables into the electrical panel through the fairlead supplied, connect the
ends to the terminals and fasten them in place using the special tear-proof cable clamp (see Fig. 2.1). The power line to the
humidifier must be fitted with a cut-off switch and fuses protecting against short-circuits, to be mounted by the installer. Table
7.1.1 shows the recommended cross-sections of the power cable and the recommended sizes of the fuses; note, however, that
this data is purely indicative and, in the event of non-conformity with local standards, the latter must prevail.
7.1 Power supply voltages
Table 7.1.1 lists the electrical data regarding the power supply voltages of the various models and the functional characteristics
of each. Note that some models may be powered at different voltages, obviously with different consumption and steam
production values.
power supply nominal characteristics
base
model code voltage
(1)
(V - type)
elements
(2)
(nox Ω)
connec-
tion type
(3)
current
(2)
(A)
power
(2)
(kW)
production
(2; 5)
(kg/h)
cable
c.sec. (4)
(mm2)
line
fuses
(4)
(A / type)
wiring
diagram
(Fig.)
element
connection
wiring
diagram
(Fig.)
UR002 C 200 - 1∼N 1 x 29.5 - 6.8 1.4 1.8 2.5 16 / fast-blow 7.9.1 and 7.10.1 7.8.4
U 208 - 1∼N 1 x 29.5 - 7 1.5 2 2.5 16 / fast-blow 7.9.1 and 7.10.1 7.8.4
D 230 - 1∼N 1 x 29.5 - 7.8 1.8 2.4 2.5 16 / fast-blow 7.9.1 and 7.10.1 7.8.4
UR004 C 200 - 1∼N 1 x 17.6 - 11.3 2.3 3 2.5 20 / fast-blow 7.9.1 and 7.10.1 7.8.4
U 208 - 1∼N 1 x 17.6 - 11.8 2.5 3.2 2.5 20 / fast-blow 7.9.1 and 7.10.1 7.8.4
D 230 - 1∼N 1 x 17.6 - 13 3 4 2.5 25 / fast-blow 7.9.1 and 7.10.1 7.8.4
UR006 C 200 - 1∼3 x 26.7 ≡22.5 4.5 6 10 40 / fast-blow 7.11.1 and 7.12.1 7.8.3
U 208 - 1∼3 x 28.1 ≡22.2 4.6 6.1 10 40 / fast-blow 7.11.1 and 7.12.1 7.8.3
D 230 - 1∼3 x 35.3 ≡19.6 4.5 6 10 40 / fast-blow 7.11.1 and 7.12.1 7.8.3
J 200 - 3∼3 x 26.7 ∆3 x 13.0 4.5 6.0 2.5 20 / fast-blow 7.13.1 and 7.14.1 7.8.2
W 208 - 3∼3 x 28.1 ∆3 x 12.8 4.9 6.5 2.5 20 / fast-blow 7.13.1 and 7.14.1 7.8.2
K 230 - 3∼3 x 35.3 ∆3 x 11.3 4.5 6.0 2.5 16 / fast-blow 7.13.1 and 7.14.1 7.8.2
L 380 - 3∼3 x 35.3 Υ3 x 6.2 4.1 5.5 2.5 10 / fast-blow 7.13.1 and 7.14.1 7.8.1
400 - 3∼3 x 35.3 Υ3 x 6.5 4.5 6.0 2.5 10 / fast-blow 7.13.1 and 7.14.1 7.8.1
M 440 - 3∼3 x 47.0 Υ3 x 5.4 4.1 5.5 2.5 10 / fast-blow 7.13.1 and 7.14.1 7.8.1
460 - 3∼3 x 47.0 Υ3 x 5.7 4.5 6.0 2.5 10 / fast-blow 7.13.1 and 7.14.1 7.8.1
UR010 J 200 - 3∼3 x 16.0 ∆3 x 21.7 7.5 10.0 6 40 / fast-blow 7.13.1 and 7.14.1 7.8.2
W 208 - 3∼3 x 17.3 ∆3 x 20.8 6.1 8.1 6 40 / fast-blow 7.13.1 and 7.14.1 7.8.2
K 230 - 3∼3 x 21.3 ∆3 x 18.8 7.5 10.0 6 40 / fast-blow 7.13.1 and 7.14.1 7.8.2
L 380 - 3∼3 x 21.3 Υ3 x 10.3 6.8 9.0 2.5 16 / fast-blow 7.13.1 and 7.14.1 7.8.1
400 - 3∼3 x 21.3 Υ3 x 10.9 7.5 10.0 2.5 16 / fast-blow 7.13.1 and 7.14.1 7.8.1
M 440 - 3∼3 x 28.1 Υ3 x 9.0 6.9 9.2 2.5 16 / fast-blow 7.13.1 and 7.14.1 7.8.1
460 - 3∼3 x 28.1 Υ3 x 9.4 7.5 10.0 2.5 16 / fast-blow 7.13.1 and 7.14.1 7.8.1
UR020
UR030
Tab. 7.1.1
(1) Tolerance allowed on nominal mains voltage: ± 10 %. (3) -: single-phase; ≡: single-phase in parallel; ∆: delta; Υ: star.
(2) Tolerance on nominal values: +5%, -10% (EN 60335-1). (4) Recommended values; referred to the laying of the cable in closed PVC or rubber
raceways with a length of 20m; the standards in force must in any case be followed.
(5) Instantaneous steam production:the average steam production may be influenced by external factors, such as: ambient temperature, water quality, steam
distribution system.

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7.2 Checking the voltage of the auxiliary circuit transformer
The multi-voltage toroidal transformer for the auxiliary circuits has four
primary windings (for the voltages: 200-208V, 230V, 400V, 440-460V)
and one secondary winding (24V).
The connection is made and checked in the factory, according to the
voltage shown on the specification plate.
In the event of a change in the voltage of the power supply or
intervention on the electrical panel, before powering the appliance, check
the exactness of the connection (check wiring diagram).
The transformer primary is protected by 10.3 x 38mm cylindrical fuses, calibrated as indicated in Table 14.3.6.1.
7.3 Main control board
The auxiliary connections, depending on the chosen model and the
control module, must be made by introducing the external cables into
the electrical panel. For this purpose use the smaller fairlead on the
base of the machine, passing the cables through the raceway on the
internal partition to the removable screw terminals placed on the main
control board, as shown in Fig. 7.3.1 and described in the following
paragraph.
7.4 Description of the terminal block and connections (functions and electrical specifications)
Before connecting the probes or the external regulator, set parameters A2 and A6 according to the
command signal (see THE HUMIDIFIER CONTROLLER)
terminal function electrical specifications
1I supply probe input signal input impedance: 50 Ωif programmed for 0÷20mA or 4÷20mA
60 kΩif programmed for 0÷1V or 0÷10V or 2÷10V
2I GND
3I
≈32Vdc derived from rectifying of 24Vac; max 250mA
4I 12Vdc stabilised accuracy ±5%; Imax=50mA
5I ambient probe input signal
or signal from external regulator input impedance: 50 Ωif programmed for 0÷20mA or 4÷20mA
60 kΩif programmed for 0÷1V or 0÷10V or 2÷10V
6I GND
7I
remote
Rmax=50
Ω; Vmax=24Vdc; Imax=10mAdc
8I enabling
1H NO alarm contact
2H common alarm contact 250V; 8 A with resistive load; 2A with indicative load
3H NC alarm contact
1G NO dehumidification contact 250V; 8 A with resistive load; 2A with indicative load
2G common dehumidification contact
1J ≈32Vdc derived from rectifying of 24Vac; max 250mA
2J L + standard RS-485
3J L -
4J GND
1K remote control terminal block button switch NC contact
2K for DRAIN command with simultaneous common contact
3K disconnection of the power supply NO contact
Tab. 7.4.1
0 - w hite
440-460 V -
y
ellow
400 V - blue
200-208 V - black 24 V - red
0 - red
INPUT PRIM ARY SECONDARY
Fi
g
. 7.2.1
terminal block H
(
alarm contact
)
remote manual DRAIN command terminal block
terminal block J (to remote terminal or supervisory
system)
terminal block G
(
dehumidification
terminal block I (control signals)

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7.5 Auxiliary connections
Before making the auxiliary connections, disconnect electrical power to the appliance!
7.5.1 Type C control module with ON/OFF action
The humidifier is controlled by a mechanical humidistat H or a voltage-free remote contact CR,
or a combination of both.
The control module can be connected to an RS485 serial line, or alternatively to the Carel
Humivisor remote control panel, marked as MT, or to a remote supervisor.
The diagrams in Fig. 7.5.1.2 show the connections to be made on the terminal block I, in the
following cases:
a) action commanded by simple enabling contact;
b) action from external mechanical humidistat;
c) combination of the above.
Fig. 7.5.1.1
7.5.2 Type H control module with modulating action
The humidifier with modulating action is fitted with solid-state relays, and thus its capacity can be varied from zero to 100%
depending on the regulation requirements. In this case too, the humidifier can be connected via RS485 to the Carel Humivisor MT
remote control panel or a remote supervisor. It can be controlled in the following three different modes.
a) Slave regulation, with signal from an external regulator.
Steam production is managed by an external regulator R which transmits a modulating signal
to the control module; the control module can be programmed to receive alternatively one of
the following modulating signals (see THE HUMIDIFIER CONTROLLER):
• voltage signal: 0-1Vdc; 0-10Vdc; 2-10Vdc;
• current signal: 0-20mA; 4-20mA.
The reference (zero) of the external regulator must
be connected to terminal 6I on the terminal block I
and the command signal to terminal 5I.
To avoid disturbances in regulation, the ground of
the external regulator must be connected to the
ground of the control.
b) Autonomous modulating regulation with ambient relative humidityprobe (and possible limiting probe in the supply duct).
With this configuration (see Fig. 7.5.2.3) the main
control board, connected to a humidity probe HT,
performs a complete regulation action according to
the humidity measured.
A limiting humidity probe in the supply duct can
also be added (see Fig. 7.5.2.4): with this
configuration, typical of air handling systems, the
main control board, connected to a humidity probe
HT, performs a complete regulation action, as well
as limiting the steam production depending on the
value of relative humidity in the supply duct,
measured using the special probe CH.
∼
H
CR
MT
CR
1I
2I
3I
4I
5I
6I
7I
8I
H
1I
2I
3I
4I
5I
6I
7I
8I
1I
2I
3I
4I
5I
6I
7I
8I
H
CR
a
b c
Fig. 7.5.1.2
1I
2I
3I
4I
5I
6I
7I
8I
CR
OUT
REF
External regulator
∼
CR
R
MT
MT
CR
HT
∼
CH
HT
MT
C
∼
Fig. 7.5.2.3

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eaterSteam
Carel code +030221761 preliminary version
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The diagrams shown in Fig. 7.5.2.5 indicate the connections to be made using Carel probes, for:
a) just one relative humidity probe;
b) a limiting humidity probe in supply duct.
possible Carel probes
ambient
ASWH100000
air ducts
ASDH100000
ASDH200000
special applications
ASPC230000
ASPC110000
The control can be connected to non-Carel active probes; see Using different brand probes.
7.5.3 Control module T for steam baths with modulating action
The control of this appliance features autonomous internal regulation, and is connected to a
temperature probe TT.
This performs a complete regulation action according to
the temperature measured inside the environment being
controlled.
Fig. 7.5.3.2 shows the connection of Carel probe model
ASET030001, with a measurement range of -30÷90 °C,
or SST00B/P40.
The command signal must be connected to terminal 5I,
whose reference (GND) is represented by terminal 6I.
The control can be connected to non-Carel active probes; see Using different brand probes.
7.6 Other auxiliary contacts
7.6.1 Alarm contact
The humidifier's control module features a voltage-free switching contact for the remote
signalling of the presence of one or more anomalous events or alarms.
Connection to the alarm contact (250Vac; maximum load: 8 A resistive - 2 A inductive) is
made using the removable terminal block H, as per Fig. 7.6.1.1.
7.6.2 Dehumidification contact
In the advanced version with internal regulation and humidity transducer, the control
module features a voltage-free NO contact, the closing of which can, if required, be
programmed to activate an external dehumidification device: in this case the appliance
assumes the functions of a complete ambient relative humidity control.
Connection to the dehumidification contact (250Vac; maximum load: 8 A resistive - 2 A
inductive) is made using the removable terminal block G, as per Fig. 7.6.2.1.
7.6.3 Remote terminal / supervisory system
The humidifier's control module can be connected to an RS485 serial line, as per the
diagram in Fig. 7.6.3.1, or alternatively to:
• a Carel Humivisor remote control panel (see specific instruction manual), which can be
connected to four different humidifiers;
• a remote supervisory system.
The transmission line can reach a maximum distance of 1000 metres between the two most
distant points.
1I
2I
3I
4I
5I
6I
7I
8I
CR
+
(
G
)
out H
M
HT
relative humidity Carel
probe
HT
relative humidity Carel
p
robe
CH
CAREL relative
humidity probe in
su
pp
l
y
1I
2I
3I
4I
5I
6I
7I
8I
+
(
G
)
out H
M
+
(
G
)
out H
M
CR ba Fig. 7.5.2.5
1I
2I
3I
4I
5I
6I
7I
8I
CR
+
(
G
)
out T
M
TT
Temperature Carel
probe
1H
2H
3H
1G
2G
24 L + L -
G
ND
4
J
3
J
2
J
1
J
MT
CR
TT
∼
Fig. 7.5.3.1 Fig. 7.5.3.2
Fig. 7.6.1.1
Fig. 7.6.2.1
Fig. 7.6.3.1