Carel compactSteam User manual

High Efficiency Solutions
compactSteam
NO POWER
& SIGNAL
CABLES
TOGETHER
READ CAREFULLY IN THE TEXT!
Steam humidier for residential rooms
Umidicatore a vapore per ambienti residenziali
Manuale d’uso
User manual

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“compactsteam”+0300092IE - rel. 1.2 - 14.01.2021
User manual

Warning
If present, remove the following items:
Close the cylinder clamp
Remove before installing
Remove before installing
Remove before installing Remove before installing
Remove before installing

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WARNINGS
The CAREL Industries humidiers are advanced products, whose operation is
speci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 Industries product, in relation to its advanced level of technology,
requires setup/conguration/programming/commissioning to be able to
operate in the best possible way for the specic application. The failure to
complete such operations, which are required/indicated in the user manual,
may cause the nal product to malfunction; CAREL Industries accepts no
liability in such cases.
The customer (manufacturer, developer or installer of the nal equipment)
accepts all liability and risk relating to the conguration of the product in
order to reach the expected results in relation to the specic nal installation
and/or equipment. CAREL Industries may, based on specic agreements, acts
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 humidier and
the 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 followed for the correct use of the product:
• DANGER OF ELECTRIC SHOCK
The humidier contains live electrical components. Disconnect the
power supply before accessing inside parts or during maintenance and
installation.
• DANGER OF WATER LEAKS
The humidier automatically and constantly lls/drains certain quantities
of water. Malfunctions in the connections or in the humidier may cause
leaks.
• DANGER OF BURNS
The humidier contains high temperature components and delivers steam
at 100°C/ 212°F.
Warning:
• The installation of the product must include an earth connection, using the
special yellow-green terminal available in the humidier.
• The environmental and power supply conditions must conform to the
values specied on the product rating labels.
• The product is designed exclusively to humidify rooms either directly or
through distribution systems (ducts).
• Only quali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.
• Only water with the characteristics indicated in this manual must be used
for steam production.
• 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 modications that are not authorized by the
manufacturer are considered improper. CAREL Industries declines all
liability for any such unauthorized use.
• Do not attempt to open the humidier in ways other than those specied
in the manual.
• Observe the standards in force in the place where the humidier is installed.
• Keep the humidi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 Industries declines all liability
for direct or indirect damage following water leaks from the humidier.
• Do not use corrosive chemicals, solvents or aggressive detergents to clean
the inside and outside parts of the humidier, unless specically indicated
in the user manual.
• Do not drop, hit or shake the humidier, as the inside parts and the linings
may be irreparably damaged.
CAREL Industries adotta una politica di continuo sviluppo. Pertanto si riserva
il diritto di eettuare modiche e miglioramenti a qualsiasi prodotto descritto
nel presente documento senza preavviso. I dati tecnici presenti nel manuale
possono subire modiche senza obbligo di preavviso.
La responsabilità di CAREL Industries in relazione al proprio prodotto è
regolata dalle condizioni generali di contratto CAREL Industries pubblicate
nel sito www.carel.com e/o da specici accordi con i clienti; in particolare,
nella misura consentita dalla normativa applicabile, in nessun caso CAREL
Industries, i suoi dipendenti o le sue liali/ aliate saranno responsabili di
eventuali mancati guadagni o vendite, perdite di dati e di informazioni, costi
di merci o servizi sostitutivi, danni a cose o persone, interruzioni di attività, o
eventuali danni diretti, indiretti, incidentali, patrimoniali, di copertura, punitivi,
speciali o consequenziali in qualunque modo causati, siano essi contrattuali,
extra contrattuali o dovuti a negligenza o altra responsabilità derivanti dall’
utilizzo del prodotto o dalla sua installazione, anche se CAREL Industries o le
sue liali/aliate siano state avvisate della possibilità di danni.
DISPOSAL
The humidi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. thepublicorprivatewastecollectionsystemsdenedbylocallegislationmust
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 e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. intheeventofillegaldisposalofelectricalandelectronicwaste,thepenalties
are specied by local waste disposal legislation.
Warranty on the 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 certied design and production system, as well as by the
mark.

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Content
1. COMPACTSTEAM OPERATION 9
1.1 Operating stages .......................................................................................................................................9
1.2 Cylinder service life....................................................................................................................................9
2. MODELS 11
3. INSTALLATION 12
3.1 Positioning...................................................................................................................................................12
3.2 Mounting......................................................................................................................................................12
3.3 Characteristics of the supply water ...........................................................................................14
3.4 Drain water..................................................................................................................................................14
3.5 Water connections..................................................................................................................................14
3.6 Steam distribution ..................................................................................................................................16
3.7 Electrical connections...........................................................................................................................17
3.8 Power wiring...............................................................................................................................................18
3.9 Control wiring............................................................................................................................................18
3.10 On/O operation.....................................................................................................................................19
3.11 Modulating operation..........................................................................................................................19
3.12 RS485 supervisor card (standard for P/Ns CH%04N2003)..............................................20
3.13 Wiring connections................................................................................................................................21
3.14 Control device wiring diagram.......................................................................................................21
4. STARTING 23
4.1 Checks when starting...........................................................................................................................23
4.2 CompactSteam control device.......................................................................................................23
4.3 Starting compactSteam......................................................................................................................24
4.4 Cylinder pre-wash (rst start-up or replacement)...............................................................24
5. COMPACTSTEAM OPERATION 25
5.1 Displaying information ........................................................................................................................25
5.2 Setting the maximum steam production................................................................................25
5.3 Manual drain cycle..................................................................................................................................25
5.4 Resetting the hour counter...............................................................................................................25
5.5 Alarms.............................................................................................................................................................25
6. TROUBLESHOOTING 27
7. MAINTENANCE 28
7.1 Periodical checks......................................................................................................................................28
7.2 Cylinder maintenance..........................................................................................................................28
7.3 Maintenance of other water circuit components ...........................................................29
7.4 Spare parts...................................................................................................................................................29
8. TECHNICAL SPECIFICATIONS 30

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1. COMPACTSTEAM OPERATION
Range of isothermal humidiers for steam production in rooms. The
steam is produced from the water contained in the cylinder (connected
to the mains). The water boils and evaporates due to the electric current
generated by two immersed electrodes in the cylinder.
1.1 Operating stages
• the humidier opens the ll valve (1) connected to the main water
supply;
• the water ows through the hose (2) to the tank (3), the ow restrictor
(4) controls the lling speed;
• when the tank is full, the water overows into the hose (6) and starts
lling the cylinder (5);
• once the level of water in the cylinder has been reached, the humidier
closes the ll valve (1);
• the current generated by the immersed electrodes in the cylinder (7)
heats the water until it boils;
• the steam exits the cylinder through the outlet (8) and - depending on
the model of humidier - is distributed directly into the room (using a
fan), or into the duct (via a steam line).
Note:
• if the water in the cylinder exceeds the level sensor (9), the humidier
will activate the drain pump (11) and empty the excess quantity;
• if the current generated in the cylinder exceeds the required level, the
humidier will activate the drain pump (11) and discharge the amount
of water needed to restore the correct current;
• before emptying the humidier activates the tempering valve (10) to
cool the water to 60°C/140°F;
• the humidier automatically controls the quantity of mineral salts
dissolved in the water by activating the ll (1) and drain (11) pumps;
• the cylinder is tted with a lter (12) to prevent the mineral debris from
blocking the drain pump (11);
• if the humidier is in standby and does not produce steam for more
than 3 days (72 hours), the water in the cylinder is automatically
emptied;
• the ll tank (3) is connected to an overow hose (13) to prevent contact
between the mains water and the water in the cylinder;
• the current running through the cylinder is controlled by the current
transformer connected to the electrodes (7).
HL
DP DT EVF
7
12
5
10
1
4
6
2
13
13
9
8
11
Fig. 1.a
Key:
No. Description No. Description
1 ll valve 8 steam outlet
2 ll hose 9 level sensor
3 ll tank 10 tempering valve
4 ow restrictor 11 drain pump
5 cylinder 12 water drain lter
6 cylinder ll hose 13 overow hose
7 immersed electrodes
A
F
B
C
D
E
Fig. 1.b
Key:
No. Description
A Steam generator cylinder
B Steam blower (optional)
C User interface/display
D On/o button
E Fill and mixing valves
F Drain pump
1.2 Cylinder service life
Basic information
The plastic cylinder containing the electrodes is the most important
component of the humidier. During operation, the water in the cylinder
boils to produce steam. As the steam does not entrain any of the minerals
dissolved in the water, the concentration of such minerals will increase
the more steam is produced; moreover, some salts (especially calcium
and magnesium bicarbonates) tend to foul the electrodes, until these
become electrically insulated. As the electrodes become progressively
coated with scale, the water level in the cylinder is increased so that a
new portion of clean electrodes can conduct the current. Eventually, the
electrodes will be completely coated with scale and will no longer be
able to conduct the current needed to produce steam. The humidier
controller can detect when there is low current between the electrodes,
indicating the end of the cylinder’s service life; this is displayed by
alarm code E3. Several factors inuence cylinder service life (water
characteristics, such as hardness and quality, % of steam production); for
the part numbers specied in Table 8.a, the cylinder has a service life of
600 or more hours.
Water drain
Water ll

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Cylinder service life and water characteristics
The characteristics of the water, which vary greatly depending on the
location, profoundly aect the cylinder’s service life. The most important
characteristics are the amount of minerals dissolved in the water and
their chemical composition. For example, a high calcium and magnesium
bicarbonate content will cause fouling that leads to a rapid reduction in
cylinder service life. On the other hand, a considerable chloride content
in the water may cause corrosion, with possible electrical discharges
between the electrodes.
Cylinder service life and humidity load
The demand for humidity inuences the cylinder’s service life. In normal
systems, where the humidity load is correctly estimated, the humidier
will operate at maximum capacity only for brief, intermittent periods. In
this way, the water level inside the cylinder increases simply to make up
for the build-up of scale, and this helps maximise the cylinder’s service
life.
In some special installations where maximum steam production is
required at all times, cylinder service life is reduced, as the water level
is generally higher and therefore scale builds up more quickly on the
electrodes. It is therefore extremely important to correctly estimate the
capacity of the humidier in relation to the required humidity load.
Cylinder service life and maximum production
Another factor that inuences cylinder service life is the maximum steam
production that can be set on the unit. The higher the steam production,
the shorter the cylinder life, and vice-versa. Figure 1.c qualitatively shows
the ratio between maximum steam production and cylinder service life.
20%
100%
Fig. 1.a
Cylinder life
Maximum production

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Examples:
CH004N0003: compactSteam for ducted humidication
(m = 0),
nominal steam ow-rate 4.5 kg/h / 9.9 pounds/hour (ss = 04) 115/230
Vac single-phase
not customised, (xx = 00),
version 3 (r = 3)
Note: some models may not be available in all regions.
2. MODELS
Two versions of compactSteam humidiers are available:
Duct steam distribution Direct room distribution
(not available on the American market)
Fig. 2.a Fig. 2.b
compactSteam is furthermore manufactured in three dierent models
(see Table 2.a), which dier in terms of voltage (depending on the
national grid). Each model is identied by a 10 character alphanumeric
part number. The meaning of each character is as follows:
CH m ss c v xx r
CH = stands for compactSteam Humidier and is always present;
m= model: 0 stands for humidication in the duct; F for direct in-room
humidication (not available for the American market);
ss = nominal steam ow-rate in kg/h, this is always 04 = 4.5 kg/h;
c= type of control, always N (N = ON/OFF control);
v= power supply:
0 = 115/230 VAC single-phase, 2 = 230 VAC single-phase;
xx = customisation;
r= version.
Model Ref. Type of installation Power supply Approval
CH004N2003 Fig. 2.a duct 230 Vac CE/EAC
CHF04N2003 Fig. 2.b direct in-room 230 Vac CE/EAC
CH004N0003 Fig. 2.a duct 115/230 Vac ETL
Tab. 1.a

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3. INSTALLATION
3.1 Positioning
• The compactSteam unit is designed for wall-mounting;
• to ensure correct steam distribution, position the humidier near the
point of steam distribution steam;
• make sure the humidier is vertical, leaving the minimum clearances
(see Fig.3.a and Tab. 3.a for the installation of the duct model and Fig.
3.b and Tab. 3.b for the room model) to ensure safety and allow for the
necessary maintenance operations.
Duct steam distribution
A
B
C
D
E
F
Millimetres Inches
A150 mm 6“
B150 mm 6“
C150 mm 6“
D150 mm 6“
E600 mm 24“
Fmax. 0.2
Tab. 3.a
Fig. 3.a
Direct room distribution
C
D
A
B
Millimetres Inches
A150 mm 6“
B1500 mm 60“
C1800 mm 72“
D600 mm 24“
Tab. 3.b
Fig. 3.b
Dimensions of the unit (for all models):
A
B
C
Millimetres Inches
A341 mm 13.4”
B204 mm 8.1”
C600 mm 23.7”
kg lb
Empty weight 8 kg 18 lib
Packaged
weight
10 kg 22 lib
Weight in-
stalled + water
12 kg 26 lib
Tab. 3.c
Fig. 3.c
3.2 Mounting
Removing the front cover
The front cover is fastened to the body unit using four Phillips head screws
located in the four corners of the unit. Use a screwdriver to unscrew the
four screws on the cover as shown in Fig. 3.d, then remove the cover
by simply pulling it outwards (Fig. 3.e). To replace the cover, perform the
same operations in the reverse order.
Be careful not to over-tighten the screws.
Fig. 3.d
Fig. 3.e

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Fastening to the wall
Instructions for fastening to the wall:
1. drill the holes in the wall according to the drilling template supplied;
2. fasten compactSteam to the wall using the screws and the anchors
supplied.
Fig 3.f shows the measurements in mm (inches in brackets) for wall-
mounting.
60
[2 3/8]
98,5
[3 7/8]
128
[5]
256
[10 1/8]
128
[5]
448
[17 5/8]
36
[1 3/8]
99
[3 7/8]
62
[2 1/2]
53
[2 1/8]
37
78
[3 1/8] [1 1/2]
102
[4]
600
[23 5/8]
35
[1 3/8]
69
[2 3/4]
48
ø 40
[1 5/8]
ø 50
[2]
ø 23
[7/8]
ø 30
[1 1/8]
[1 7/8]
61
[2 3/8]
16
[5/8]
70
[2 3/4]
65
[2 1/2]
60
[2 3/8]
ø 23
[7/8]
94
[3 5/8]
81
[3 1/4]
50 [2]
9
[3/8]
54
[2 1/8]
24
[7/8]
40
[1 5/8]
38,5
[1 1/2]
Fig. 3.f

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3.3 Characteristics of the supply water
The humidier must be supplied with water with the following
characteristics:
• pressure between 20psi and 110psi or 0.1 and 0.8 MPa (1 and 8 bar);
• temperature between 33°F and 104°F or 1°C and 40°C;
• ow-rate minimum of 0.45 L/min or 0.12gpm.
The connection must be ¾”G (see chap. 8“Technical specications”):
• hardness no greater than 40°fH (equal to 400 ppm of CaCO3);
• conductivity: from 100 to 1250 μS/cm;
• absence of organic compounds.
The characteristics of the supply-water must fall within the following
limits:
supply water characteristics unit of
measure
normal water water with low
salt content
min. max. min. max.
Hydrogen ions (pH) 7 8.5 7 8.5
Specic conductivity at 20 °C (σR,
20 °C)
µS/cm 350 1250 100 350
Total dissolved solids (cR) mg/l (1) (1) (1) (1)
Dry residue at 180 °C (R180) mg/l (1) (1) (1) (1)
Total hardness (TH) mg/l CaCO3100 (2) 400 50 (2) 160
Temporary hardness mg/l CaCO360 (3) 300 30 (3) 100
Iron + Manganese mg/l Fe+Mn = 0.2 = 0.2
Chlorides ppm Cl-= 30 = 20
Silica mg/l SiO2 = 20 = 20
Residual chlorine mg/l Cl2= 0.2 = 0.2
Calcium sulphate mg/l CaSO4 = 100 = 60
Metallic impurities mg/l 0 0 0 0
Solvents, thinners, detergents,
lubricants
mg/l 0 0 0 0
Tab. 3.d
(1)= values depend on the specic conductivity; in general:
CR≅0.93 * σR, 20 °C; R180 ≅0.65 * σR, 20 °C
(2) = not less than 200% of the chloride content in mg/l CL-
(3) = not less than 300% of the chloride content in mg/l CL-
There is no reliable relationship between hardness and conductivity of
the water.
Important:
• do not treat the water with softeners, this may cause the entrainment
of foam, aecting the operation of the unit;
• do not add disinfectants or anticorrosive compounds to the water, as
these are potential irritants;
• the use of well water, industrial water or water from cooling circuits
and, in general, any potentially chemically or bacteriologically
contaminated water is not recommended.
3.4 Drain water
• This contains the same substances dissolved in the supply water,
however in higher quantities;
• it is cooled to 60°C / 140°F by mixing it with supply water;
• it is not toxic and can be drained into the sewerage system.
3.5 Water connections
Before proceeding make sure that the humidier is disconnected from
the main power supply.
Connection to the main water supply
NOTICE: for the Australian market and to comply with Watermark
requirements, a watermarked approved dual check valve shall be installed
in the supply line to the humidier when connected to potable water.
Should on the other hand the humidier be fed with treated water from a
Carel reverse osmosis system connected to potable water, the dual check
valve shall be installed in the supply line to the reverse osmosis system.
Install a manual valve upstream of the installation to be able to cut o
the water supply, as illustrated in Fig. 3.h. Connect the humidier to the
main water supply using a hose capable absorbing water hammer, to
avoid damaging the ll valve. The hoses are identied by the following
CAREL codes: FWH3415000 (1.5 m /4ft long), FWH3 430000 (3 m /9.5ft
long ). Alternatively, a hose with a minimum inside diameter of 6 mm /
1/4”can be used.
If soft polymer tubing is used, secure this to the wall to prevent it from
detaching from the ll connector and this avoiding water leaks. The
threaded ll valve tting is located at the bottom of the humidier
(see Fig. 3.g). Remember that the ll valve is tted with a lter that
requires periodical cleaning. Make sure there is sucient clearance for
maintenance. The water line can be connected either through the holes
at the rear (so that these remain hidden behind the unit) or through the
holes at the bottom of the unit.
Important: When installation is completed, ush the supply hose
for around 30 minutes by piping water directly into the drain, without
sending it into the humidier. This will eliminate any scale or processing
residues that may block the drain pump and cause foam when boiling
Water drain
In addition to the connection to the feedwater supply, compactSteam
also requires a connection to a drain pipe so as to empty the water from
inside the cylinder whenever necessary.
CH004N2003 and CHF04N2003
The drain pipe can be connected at the rear for these units only (as
shown in Fig. 3.i) or at the bottom part of the appliance, using the angle
connector supplied (Fig. 3.g and 3.h).
For rear connection, the drain pipe must have a minimum slope of at
least 5° (Fig. 3.i) and a drain trap must be installed to prevent drain odours
from escaping, as shown in Fig. 3.h.
In both cases, the drain pipe must have a minimum inside diameter of
32 mm (1-1/4”) and must be xed to the humidier drain outlet without
weighing on the unit.
Fig. 3.g
min. 5°
4
5
Fig. 3.h
(for CH004N2003 and CHF04N2003)
Water drain
Fill valve and lter

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CH004N0003
In this case, the drain pipe can only be connected at the bottom of the
appliance (Fig. and must have a minimum inside diameter of 19 mm
(3/4”); it must be xed to the humidier drain outlet without weighing on
the unit. Observe the following instructions for the installation distances.
boiler
raccordo circa 90°
D
D = 1m
Fig. 3.i
135°
D
boiler
D = 0,7 m
Fig. 3.j
Fig. 3.k
(CH004N0003 units only)
General instructions for all units
The characteristics of the drain line are shown in Tab. 3.e. It is also
recommended to provide a funnel to interrupt continuity in the drain
pipe and avoid ooding inside the appliance. compactSteam is equipped
with a mixing valve that, by opening at the same time as the drain
pump, introduces cold feedwater into the drain line so as to guarantee a
maximum drain water temperature of 60°C (140°F).
Instant drain ow-rate 50Hz 25 l/min / 6.6 gpm
Instant drain ow-rate 60Hz 26.2 l/min / 7 gpm
Nominal connection diameter 32 mm / 1-1/4”
Drain temperature 60°C / 140°F
Tab. 3.e
1
6
2
3
4
5
Fig. 3.l
(for CH004N2003 and CHF04N2003)
Important: for all units, a distance of xxx must be ensured
without any bends, underneath the drain
Key:
1 Supply
2 Manual valve
3 External lter (recommended)
4 Drain funnel
5 Drain
6 Water ll hose
(FWH3415000 or FWH3430000)
drain water

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3.6 Steam distribution
Steam injection in the duct
The maximum static pressure allowed in the duct is 950 Pa (95 mm water
column /3.7”W.C.)
The compactSteam duct models can be used with the plastic nozzle
shown in Figure 3.j (CAREL code SDPOEM00**) for the injection of steam
in the duct. The dimensions are shown in Table 3.f. These distributors can
be tted horizontally or vertically (hole facing upwards).
Installing the CAREL SDPOEM00** jet distributors (see
Fig.3.j)
• make a series of holes on the wall according to the distributor drilling
template (included in the packaging);
• insert the distributor with the steam opening inside the duct; fasten
the ange using 4 screws.
F
H
G
I
C
A
BB
D
I
H
G
F
1
A
A
E
B
A
1
2
2
Fig. 3.m
Millimetres Inches
A31.5 mm 12.4”
B50 mm 1.96”
C56 mm 2.20”
D57.5 mm 2.26”
E100 mm 3.93”
FØ 8 mm Ø 0.31”
GØ 22 mm Ø 0.86”
HØ 30 mm Ø 1.18”
I12 or 22 mm 0.47 or 0.87”
1Steam inlet
2Condensate outlet
Tab. 3.f
Alternatively, a stainless steel distributor for ducts can be used (CAREL
code DP0**D22R0):
B
Y
X
A
Xl
°2
3
1
2
4
Fig. 3.n
1steam inlet (ØA)
2condensate drain (ØB)
3ange gasket
4screw max diameter. “M5 / (3/16”) (see instruction sheet supplied with the
distributor)
ØA 22 mm (7/8”)
ØB 10 mm (3/8”)
ØY 58 mm (2 1/4”)
Ø35 mm (1 3/8”)
X 68 mm (2 11/16”)
Tab. 3.g
P/N
• DP045D22R0: l = 438 mm / 17 1/4”
Tab. 3.h
Assembling the CAREL linear distributor DP045D22R0
(Fig. 3.j.a):
• make a series of holes on the wall according to the distributor drilling
template (included in the packaging);
• insert the distributor with the steam holes facing upwards;
• fasten the ange using 4 screws.
Important: to allow the condensate to return through the drain
connection, t the distributor at a slight incline (at least 2°, see Fig. 3.l)
Condensate drain hose
During operation some of the steam may condense, causing a decline in
eciency and noise (gurgling). To drain the condensate, connect a drain
hose (CAREL code 1312353APG) with a drain trap and a minimum slope
of 5° to the bottom of the humidier (see Fig. 3.l). The condensate hose
should run through the hole located at the top of the ll tank inside the
humidier, as illustrated in Fig 3.k.
IMPORTANT WARNING: for correct operation, the drain trap
should be lled with water before starting the humidier.
Fig. 3.o
Steam hose
• make the connection between the humidier and distributor using a
hose (it is recommended to use the steam hoses supplied by CAREL,
code 1312360AXX). Unsuitable hoses may weaken and crack causing
steam leaks;
• avoid the formation of pockets or traps where condensate may form;
• avoid choking the hose due to tight bends or twisting.
fasten the end of the hose to the connectors on the humidier and the
steam distributor using metal clamps (not supplied), so that these do not
detach due to the high temperature.
Toconnect tothe cylinderhose steam use theadapter codeCHKADAP000.
WARNING: the length of the hose must not exceed 4 m / 13ft.
Figure 3.l shows examples of correct and incorrect installation of the
steam delivery hoses and condensate drain hoses.
Steam cylinder hose adapter

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“compactsteam”+0300092IE - rel. 1.2 - 14.01.2021
≥20%
≥5%
≥5%
1.5 m (5 FT max.)
3 m (10 FT max.)
≥20%
0 m (3 FT max.)
1.5 m (5 FT max.)
SI
≥20% ≥20%
1.5 m (5 FT max.)
NO
Fig. 3.p
ROOM steam distribution
compactSteam can distribute the steam directly into the room being
humidied. For direct humidication, both the compactSteam with
built-in blower (CAREL code CHF*******) and the duct model (code
CH0*******) can be used, the latter connected to a remote room blower
(code VRDCHA1000 for 110 Vac models, and VRDCHA2000 for 230 Vac
models). The following drawing (Fig 3.m) shows the minimum distance
that must be observed when installing the remote steam blower, so
as to avoid burning and the condensation of steam on objects such as
lights, electrical equipment, cold surfaces, etc. For further details on the
installation and use of the blower, see the corresponding manual.
30%
A
CB
Fig. 3.q
Millimetres Inches
A150 mm 6“
B1500 mm 60”
C600 mm 24“
3.7 Electrical connections
Before proceeding with the electrical connections:
• make sure that the humidier is disconnected from the main;
• check that the unit’s power supply voltage corresponds to the
value indicated on the rating plate inside the electrical panel.
(Note: The tolerance allowed on the rated voltage is -15% +10%);
• the humidier power line must be tted with a disconnect switch and
fuses to protect against short circuits (to be tted by the installer).
Note: To avoid unwanted interference, the power cables should be
kept separate from any control wiring. All the wiring must comply with
the national and local electrical standards in force.
no condensate drain
horizontal section
Typical installation if the unit is higher than the
steam distributo
Condensate drains
Condensate
drains
Condensate drain
with drain trap
Note: the drain trap
height must exceed
the static pressure of
the piping
steam delivery hose
obstacle
Gentle curve
Notes:
• The minimum slope of the steam delivery hose in the upward section must be 20%;
• The minimum slope of the steam delivery hose in the downward section must be 5%;
• The maximum length of the hose is 4 m/13 ft.
radius of curvature too tight
choking
dip
no drain trap
no slope
dip without drain dip without drain
no condensate drain

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“compactsteam”+0300092IE - rel. 1.2 - 14.01.2021
Power supply voltage selection [ CH004N0003 only]
230
115
Fig. 3.r
Humidier model CH004N0003 can be powered at either a nominal
voltage of 115 Vac 50/60 Hertz or a nominal voltage of 230 Vac 50/60
Hz. The factory setting is 230Vac. If the mains power supply is 115 Vac,
the setting must be changed, following the procedure described below:
1. Makesurethepowercableisdisconnectedfromthemainspowersupply
and that the power button is in the OFF position.
2. Remove the top cover from the unit (see par. 3.2).
3. Setthelinevoltageselector(showninthegure)tothedesiredvoltage.
4. Close the cover on the unit.
3.8 Power wiring
To connect the humidier to the mains:
• once the power cables have been run into the unit, use the cable
clamps illustrated in Fig 3.o to secure them in the correct position;
• connect the power cables to the terminal block at the bottom left of
the control module, as illustrated in Fig. 3.p;
• connect the yellow-green wire to the earth terminal on the unit
located on the metal support plate under the control module (Fig. 3.q).
Fig. 3.s Fig. 3.t
Fig. 3.u
Tab. 3.i shows the electrical data (power supply voltages) for each model
of humidier.
Part number Power
(single
phase)
Steam
outlet
(kg/h)
Steam
outlet
(Ibs/hr)
Pow-
er
(kW)
Cur-
rent
(A)
External
power
cables
(mm2)
Ex-
ternal
fuse
(A)
(Recom-
mended
by Carel)
external
fuse (A)
CH004N2003 230Vac
50/60Hz
4.5 9.9 4 16,7 2.5 12 30 20
CHF04N2003 230Vac
50/60Hz
4.5 9.9 4 16,7 2.5 12 30 20
CH004N0003 110-230Vac
50/60Hz
4.5@230V
2.1@110V
9.9@230V
4.6@110V
4 16,7 2.5 12 30 20
Tab. 3.i
Note: some models may not be available in all countries.
3.9 Control wiring
On compactSteam, steam production is controlled by an external signal:
• in on/o mode, a simple contact (for example a humidistat) enables/
disables steam production;
• in proportional mode, the humidier produces a quantity of steam
that is directly proportional to the 0 to 10 V signal generated by an
external control device.
compactSteam can be connected to any simple or automatic humidistat
or safety device, such as limiter humidistat, air ow control switch and
remote ON/OFF switch. To connect an external control device, run the
cables through the bottom part of the appliance until reaching the top
of the control module, and secure them with the cable clamp (see Fig.
3.s). The control wiring terminal blocks are located at the top right of the
control module (see Fig. 3.r and 3.s)
IMPORTANT NOTE: Select the correct type of control signal on the
keypad (see paragraph 5.1.1) before connecting the control wiring.
Fig. 3.v Fig. 3.w

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“compactsteam”+0300092IE - rel. 1.2 - 14.01.2021
3.10 On/Off operation
The diagrams shown in the gures on the side indicate the connections
to be performed on the terminal block in the following situations:
Fig 3.x operation controlled by a simple voltage-free remote enabling
contact, indicated as CR;
Fig 3.y operation controlled by an external mechanical humidistat,
indicated as H;
Fig 3.z a combination of the above.
Remote enabling contact (g.3x)
Remove the jumper between terminals AB-AB and connect the voltage-
free remote contact (CR) in series to terminals AB-AB; terminals IN-GND
must be jumpered. When contact AB-AB is closed, the humidier is
enabled for operation; if the contact is open, steam production stops
immediately.
Fig. 3.x
External humidistat without enabling (g. 3.y)
Connect the external humidistat between terminals IN-GND and leave
the jumper in position between terminals AB-AB. DO NOT apply any
voltage to AB-AB. If the IN-GND contact is closed, steam production
starts, while if it is open steam production stops after 5 s.
N2
G ND
N1
AB
AB
G ND
IN H
Fig. 3.y
External humidistat with enabling (g. 3.z)
Connect the external humidistat between terminals IN-GND. Remove
the jumper between terminals AB-AB and connect any limit devices,
air ow switches or remote contacts (CR) in series to terminals AB-AB.
Steam production only starts when both contacts, AB-AB and IN-GND,
are closed. If contact AB-AB is open steam production stops immediately,
while if IN-GND is open production stops after 5 s.
C R (1)
N2
G ND
N1
AB
AB
G ND
IN H
Fig. 3.z
Interlock between compactSteam for ducts and the system
fan controller
In duct applications, compactSteam starts steam production only if
there is an external call for humidity (humidistat closed) and the system
fan is on. The system fan communicates with compactSteam via the
remote input AB-AB. The following sequence of events must be true for
compactSteam to produce steam:
• External humidistat close (= steam demand);
• FAN-EXT contact closed by compactSteam, to start the system fan;
• Input AB-AB closed, indicating that the fan has started (= enable steam
production).
compactSteam can be connected to an air ow switch (that is, a device
that senses the ow of air generated by the fan in the duct). This ow
sensor should be connected to the remote enabling input (terminals
AB-AB) in series with a limit humidistat (normally closed). When the ow
sensor is connected to compactSteam, steam production is only enabled
if air ow is measured inside the duct.
Fan symbol
• O: no call (IN-GND = open), regardless of whether or not production
is enabled (AB-AB = open or closed);
• Flashing: call present (IN-GND = closed), awaiting production to be
enabled (AB-AB = open);
• On steady: call present (IN-GND = closed) and production enabled
(AB-AB = closed).
Note:
• When enabled (AB-AB = closed), the symbol goes o 30 s after the
production call is no longer present (IN-GND = open);
• When the production call is present (IN-GND = closed), the symbol
goes o 60 s after production is disabled (AB-AB = open).
3.11 Modulating operation
Connect the external 0 to 10 V modulating control device between
terminals IN-GND as shown in Fig. 3.v. Then connect any safety switches
(limit device, air ow switch, remote on/o) in series to terminals AB-AB.
If no safety switches are used, install a jumper between AB-AB. DO NOT
apply any voltage to AB-AB.
Steam production is modulated from 20% to 100% of the maximum
production, proportionally to the signal provided by the external
controller.
Fig. 3.aa

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“compactsteam”+0300092IE - rel. 1.2 - 14.01.2021
3.12 RS485 supervisor card (standard for
P/Ns CH%04N2003)
Fig. 3.ab
Description of connections on the RS485 card
Fig. 3.ac
The RS485 card is used for communication with a supervisor using the
ModBus protocol. For the list of variables, see the table below.
Caution:
• for model CH004N0003, the CHK4850000 accessory is required
• for RS485 connections in household (IEC EN 55014-1) and residential
(IEC EN 61000-6-3) environments, use shielded cable (with shield
connected to PE both on the terminal and controller ends), maximum
length specied by the EIA RS485 protocol, equivalent to European
standard CCITT V11, using AWG26 twisted pair cable; the input
impedance of the 485 stage is 1/8 unit-load (96 kOhms).
3.12.1 Parameter table
DESCRIPTION TYPE R/W CAREL
ADD
MODBUS
ADD
DEFAULT MIN MAX UNIT VOLATILE
Humidier ready (no alarms) DIGITAL R 11 11 0 0 1 -
Anti-foam wash DIGITAL R 12 12 0 0 1 -
Flag indicating the rst 50 operating hours DIGITAL R 26 26 - 0 1 -
Unit disabled via remote (display shows -) DIGITAL R/W 28 28 0 0 1 YES
0 = humidistat - 1 = 0-10 V controller (set to 0 if control via super-
visor and set the % of production using parameter PO)
INTEGER R/W 12 268 0 0 1 NO
Maximum production (PO) INTEGER R/W 13 269 100 20 100 % NO
Proportional hour counter INTEGER R 14 270 - 0 - hour -
Real hour counter INTEGER R 19 275 - 0 - hour -
Days of inactivity before wash INTEGER R/W 50 306 3 0 10 NO
Select protocol
0=CAREL
1-24 = MODBUS (see table of Modbus values)
INTEGER R/W 52 308 0 0 24 NO (unit power o
neededf)
Alarm identication (see table) INTEGER R 83 339 0 0 65535 -
Display current input ANALOGUE R 16 16 - 0 14.5 A -
Production in kg/h ANALOGUE R 17 17 - 0 4.5 kg/h -
Tab. 3.j
3.12.2 Alarm table
(16-bit multi-bit variable number 83 Carel, 339 Modbus)
BIT NUMBER DESCRIPTION ALARM CODE
1MAINTENANCE WARNING
(rated current not reached)
E6
2 DRAIN ALARM E5
3 FILL ALARM E4
4MAINTENANCE WARNING (perc. hour counter >
600)
E6
5 HIGH CURRENT ALARM E1
6 PARAMETERS NOT DOWNLOADED ALARM E0
7 NOT USED
8LOW PRODUCTION WARNING E2
9FOAM WARNING E7
10 END OF CYLINDER LIFE ALARM E8
11 NOT USED
12 NOT USED
13 NO VOLTAGE-CURRENT CONFIGURATION
WARNING
EH
Tab. 3.k
3.12.3 Modbus table
To avoid malfunctions, disable any hardware ow control on the
supervisor application level
TABLE OF MODBUS VALUES (C7) TYPE BAUD RATE
0 CAREL 19200
1 MODBUS 8,N,2 19200
2 MODBUS 8,N,1 19200
13 8,N,2 9600
14 8,N,1 9600
Tab. 3.l

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“compactsteam”+0300092IE - rel. 1.2 - 14.01.2021
3.13 Wiring connections
Terminal Function Electrical specications
L1-L2-EARTH Power supply and earth connections Power supply (110 Vac single-phase 50/60 Hz or 230 Vac single-phase 50/60 Hz)
KEY Programming port Connection to programming port or supervisor
AB-AB Remote enabling input Requires a normally-open external contact;
Rmax = 300 Ohm; Vmax = 33 Vdc; Imax = 6 mAcc; humidier enabled = contact closed
IN-GND Control signal input If programmed as 0-10 V: Input impedance 10 kohm
If programmed as ON/OFF (default): Vmax = 33 Vdc, Imax = 5mA, Rmax = 300 Ohm
NC-C-NO NC alarm contact
C common alarm contact
NO alarm contact
250V; 8 A max. with resistive load; 4 A max. with inductive load
NO-C External fan relay 250V; 8 A max. with resistive load; 4 A max. with inductive load
24-GND Power supply for external humidistat 24 Vac, 2 watts
Tab. 3.m
3.14 Control device wiring diagram
CH004N2003, CHF04N2003 Models
HL
DP
DT EVF
STEAM
BOILER UNIT
WATER OUTLET
WATER
INLET
EMBEDDED
BLOWER
(only for
CHF* models)
IN GND AB AB N1 GND N2
NO C NC CN O
24Vac GND
KEYBOARD
KEY
L1 L2
EXTERNAL FUSED
DISCONNECT TO
BE INSTALLED
(NOT SUPPLIED)
RESPECT LOCAL
CODES
POWER SUPPLY
(100Vac 1-PHASE 50-60 HZ
OR 230Vac 1-PHASE 50-60 HZ)
CONNECTED
TO GROUND
8
2
4
6
ON-OFF
BOTTON
NF
PROGRAMMING PORT
AIR PRESSURE SWITCH
HUMIDISTAT
ALARM
EXTERNAL DUCT FAN
24Vac FOR
EXTERNAL
HUMIDISTATS
ALARM
EXT FAN
HL
N
EVF
DP
N
F
INT
FAN
E1
E2
Fig. 3.ad
Key
EVF Fill valve
DT Drain valve
HL High level sensor
E1, E2 Electrodes