Carel humiSteam Basic UE001 User manual

humiSteam electrode steam humidifiers
Installation
Operation
User Manual
Read and save these instructions.
Models UE001 to UE065
Single Cylinder Units

CAREL humiSteam
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Installation, Operating & Maintenance Manual
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IMPORTANT
BEFORE INSTALLING OR HANDLING THE HUMIDIFIER PLEASE CAREFULLY READ AND FOLLOW THE
INSTRUCTIONS AND SAFE TY STANDARDS DESCRIBED IN THIS MANUAL AND ILLUSTRATED ON THE
LABELS ATTACHED TO THE MACHINE.
This humidifier produces non-pressurized steam by means of electrodes immersed in the water contained in
the cylinder-boiler (hereafter called the cylinder). The electrodes pass current through the water, which also
provides resistance, heating the water into steam, which is used to humidify environments or industrial
processe s, using special distributors.
The quality of the water used affects the process of evaporation, so the humidifier may be supplied with
untreated water, as long as this is drinkable and not softened or demineralized; the evaporated water is
automatically replaced using a fill valve. This humidifier has been designed exclusively to directly humidify
rooms or ducts, using a distribution system. The installation, use and maintenance operations must be carried
out according to the instructions contained in this manual and on the labels applied internally and externally.
The conditions of the env ironment and the power supply v oltage must comply w ith the specified
values.
All other uses and modifications made to the humidifier that are not authorized by the manufacturer are
considered incorrect.
Liability for inj ury or damage caused by the incorrect use of the humidifier lies exclusively with the
user.
Please note that the humidifier contains powered electrical devices and hot surfaces.
All service and/or maintenance operations must be performed by specialist and qualified personnel
w ho are aware of the necessary precautions and are capable of performing the operations correctly.
Disconnect the humidifier from the main pow er supply before accessing any internal parts.
The humidifier must be installed in accordance with the local standards in force.
The local safety standards in force must be applied in all cases.
The humidifier is made up of metallic and plastic parts. All parts must be disposed of according to the
local standards on waste disposal.
Certification: the quality and safety of CAREL products are assured by CAREL's ISO 9001 certified design
and production system, as well as listings from UL, cUL, CE, TUV, ETL and others.
WARNING: Your humidifier requires water to operate. Do NOT mount it above materials or machinery that
could be damaged if a leak occurs. Carel assumes no responsibility for consequential or inconsequential
damage as a result of any leaks.
Copyright © 2005 by Carel USA, LLC. All rights reserved.

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Table of Contents
How The Humisteam Works.........................................................................................................................5
1 Installation ...............................................................................................................................................6
1.1 Positioning........................................................................................................................................6
1.2.1 Removing the front cover ............................................................................................................7
1.2.2 Fastening to the wall...................................................................................................................7
1.3 Plumbing...........................................................................................................................................8
1.3.1 Water supply..............................................................................................................................8
1.3.2 Water drain ................................................................................................................................8
1.4 Steam distribution............................................................................................................................11
1.4.1A Duct injection .........................................................................................................................11
1.5 Power wiring ...................................................................................................................................15
1.6 Connect Control Wiring....................................................................................................................17
1.6.1 Controls Placement...................................................................................................................17
1.7 Control wiring..................................................................................................................................17
ASWH / ASDH – ASDH / ASDC Wall – Duct Temperature/Humidity Sensors........................................20
HC-101 and HC-201 Wall and Duct Humidistats..................................................................................21
PC-301 Air Proving Switch.................................................................................................................22
2 Start-Up.................................................................................................................................................23
2.1 Startup Checklist .............................................................................................................................23
2.2 The HumiControl Controller..............................................................................................................24
2.3 Start-up Procedure ..........................................................................................................................24
2.3.1 Starting with a new cylinder.......................................................................................................24
3 Operation...............................................................................................................................................25
3.1 Display Information..........................................................................................................................25
3.2 Changing The Set Point...................................................................................................................25
3.3 Activating Manual Drain ...................................................................................................................25
3.4 Accessing/Changing Configuration Parameters.................................................................................25
3.5 Notes about special parameters.......................................................................................................28
STANDARD CONFIGURATION SETTINGS ...........................................................................................29
3.6 Seasonal Shut Down .......................................................................................................................30
3.7 The Remote Control ........................................................................................................................30
3.8 Resetting the Hour Counter..............................................................................................................31
3.9 Alarms............................................................................................................................................31
3.10 Trouble-Shooting...........................................................................................................................35
3.11 Resetting Factory Defaults.............................................................................................................36
4 Maintenance..........................................................................................................................................37
4.1 Periodic checks...............................................................................................................................37
4.2 Cylinder maintenance ......................................................................................................................37
4.2.1 Replacing the cylinder...............................................................................................................37
4.2.2 Maintenance of the other plumbing components.........................................................................39
4.3 Replacement Parts..........................................................................................................................40
4.3.1 Single Phase Humidifiers ..........................................................................................................40
4.3.2 Three Phase Humidifiers...........................................................................................................40
4.3.3 Replacement Steam Cylinders & Parts.......................................................................................41
5 Wiring Diagrams.....................................................................................................................................43
6 Technical Specifications.........................................................................................................................46
6.1 Model Numbers...............................................................................................................................47
IMPORTANT: BEFORE beginning installation:
•Check for shipping damage to cartons. Mark the shipping waybill accordingly
•Open cartons and check for any hidden damage. Mark the shipping waybill accordingly.
•Check packing slip to ensure all items have been received. Notify Carel LLC of any shortages or
damaged parts. You must notify Carel LLC w ithin 5 working days of any shortages.

Installation, Operating & Maintenance Manual
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How The Humisteam Works
HumiSteam is an electrode humidifier. It produces s team for humidification bypassing electr ode current t hrough the water i n the steam
generat or cylinder bet ween metal electr odes . There are no heater el ements . Steam output is direc tly proportio nal t o t he c onducti vity of t he
wat er, and the amo unt o f elec trode immers ed in the water.
On a call for humidity, the HumiSteam controller will open the water fill val ve
(1) and allow water to enter the s ystem. A fl ow restrictor (2) prevents the
unit from filling too quic kl y or with too muc h press ure. The water flows up
the fill tube (3) and i nto the fill cup (7), where it flows over the conducti vity
probes (6), which feed the water conductivity bac k to the controller for
anal ysis. Water then flows over the dam i n the fill cup (7), whic h creates a
1” air gap t o prevent bac kflow of c ont ami nat ed water into t he feed lin es, and
through the fill tube (4) and into t he bot tom of the steam cylinder (11).
As the wat er fills the c ylinder, it will reach the el ectrodes (10) and c urrent
will beg in t o flo w. As the wat er continues t o fill the c ylin der, t he c urrent will
increase, and t his is monit ored by an amperage transfor mer pl aced on one
of t he power wires (9). When the desired current is reac hed, t he fill valve
will close (1) and the water will then begin to warm and produce steam. If
the water reaches the c ylinder full probes (8) prior to reaching the desired
current level, t he fill valve (1) will be cl osed to prevent overflow. If the
current rises t oo much as the water fills the c ylinder, the drain val ve or
pump (13) will be acti vat ed to drain aways ome water and reduce the
current fl ow.
Periodicall y, bas ed on the inc oming water conducti vity, the unit will drai n
some wat er to r educ e t he mineral conce ntrati on. A str ainer (12) in t he c ylin der helps to preve nt mineral d ebris from jamming the drai n
val ve (13).
If there is no water in the cylinder, t here will be no current flow and no steam production. T he electrodes do not burn out, but they will
eventuall y become compl etel y coated wit h miner al and the c ylinder will then need to be r eplaced or cleaned.
UE 001 through UE 015
No. Description
1 Stea m generator c ylinder
2 Water drain val ve
3 Power contac tor
4 Fuses
5 Power transfor mer
6 Relay board
7 On/Of f and Manual drai n s witch
8 Wiring terminal bloc k
9 Water fill val ve
UE 025 through UE065
No. Description
1 Stea m generator c ylinder
2 Water drain pump
3 Water fill val ve
4 Amperage transf ormer
5 Power contac tor
6 Power transfor mer
7 Relay
8 Fuses
9 Wiring terminal bloc k
10 Cable rac eway
11 On/Of f and Manual drai n s witch

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1 Installation
1.1 Positioning
The HumiSteam has been designed for wall mounting
(although it can be placed on a stand) and, since it is an
atmospheric steam humidifier, should be placed close to
the point where the steam will be used, to minimize the
steam hose length (and condensate). Certain clearances
must be maintained around the unit:
A B C D E F
Minimum
Dimension
(inches)
12 8 8 16 28
<0.5°
With room blow er units, other clearances are
needed:
Unit Dimensions:
* = UE045 for 460-575/3 Vac
** = UE045 for 208-230/3 Vac
VSDU0A
A B C D E F H
20 72 72 24 20 72 24
VRDXL
Minimum
dimension
(inches)
36 120 72 48 36 120 48
Model - UE
001-008 009-015 025-045* 045**-065
A 15 15 22 26
B 11 11 15 18
Dimensions
(inches) C 25 28 35 38
packaged
36 44 86 113
empty 30 38 75 97
Weight
(lbs) installed
42 60 134 207

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1.2 Mounting
1.2.1 Removing the front cover
The front cover is secured by a capture screw located underneath the CAREL
logo. Twist the CAREL logo to reveal the screw, and use a phillips head
screwdriver to remove it. Then simply lift the front cover and pull out to remove
it. Return it in reverse order.
1.2.2 Fastening to the wall
Using the screws and anchors supplied, fasten the mounting bracket to the wall.
Be sure that the screws anchor firmly into studs or supports. Note the unit
installed weights from the Positioning section.
Once the mounting bracket is secured to the wall, hang the unit on the bracket. Fasten the remaining capture
screws through the bottom holes in the unit to secure it to the wall.
Model UE
001-008 009-015 025-045
065
X 8.67 8.67 12.21 15.75
Y 19.69 23.23 28.55 30.91
Z 4.53 1.5
Z’ 4.41

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1.3 Plumbing
1.3.1 Water supply
The HumiSteam must be supplied with water (not softened) having the
following characteristics:
The water feed line should be 1/2” copper, PVC or poly tubing run to within 3 feet of the humidifier, then bushed
down to 1/4” O.D. or 3/8” O.D. copper or poly to make the final connection to the 1/4” O.D. or 3/8” O.D.
compression fitting underneath the humidifier. With poly tubing an insert should be used to support the tubing
and prevent leaks. This insert is not provided.
NOTE: Softened w ater should NOT be used as it is generally corrossiv e to the electrode plating.
1.3.2 Water drain
The HumiSteam also requires connection to a drain. The drain water characteristics are:
Model UE
001 003 005 008 009 010 015 025 035 045 065
Drain rate per hour
0.7 gph
2.2 gph
3.7 gph
5.9 gph
6.6 gph 7.3 gph 11 gph 18.3 gph 25.7 gph33 gph 47.7 gph
Instant drain rate 1.3 gpm 6 gpm
Connection 1-1/2" nominal diameter
Typical temperature 212°F
The drain line can be 1-1/2” schedule 40 CPVC, 1-1/2” copper, or 1-1/2” Polypropylene. In all cases, the drain
tube is slipped over the drain outlet on the bottom of the humidifier. It is not glued or otherwise attached to the
humidifier, so it must be supported by itself.
Drain line must be installed and plumbed to an open drain immediately after the unit.
For proper operation of the unit, the open drain should be installed before the trap (if allowed by local code).
Model UE
001-008 009-015 025-045 65
Instant flow rate 0.2 gpm 0.3 gpm 1 gpm 1.9 gpm
Connection 1/4" O.D. Compression
3/8" O.D. Compression
Temperature limits 34 to 104°F
Pressure limits 15 to 116 psi
Hardness limits <= 400 ppm CaCO3
Conductiv ity range
125 to 1250 µS /cm (micromhos)

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See the following diagram for a drain line installation diagram
Note: If utilizing the optional drain tempering dev ices, the drain line needs to be increased to a 2"
minimum nominal size for the UE025 to UE065.
WARNING: Do NOT use PVC piping unless the unit has the optional drain tempering valve installed.

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Water supply and drain connections are made according to the following diagram.
Note: Drain line must be installed and plumbed to an open drain immediately after the unit. For proper
operation of the unit, the open drain should be installed before the trap (if allow ed by local code).
Physical location of the supply and drain connections are located as shown below.
UE 010-015 UE 025-065
NOTE: Carel can provide a drain tempering system which limits the water drain to no more than 140°F.

Installation, Operating & Maintenance Manual
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1.4 Steam distribution
1.4.1A Duct injection
NOTE: If the ventilated steam distributor is to be used, then go to section 1.4.1B.
Each unit has either 7/8” (22 mm), 1-1/4” (30 mm) diameter outlet or 1-5/8” (40 mm) diameter outlets. Some
units have multiple outlets. The duct distributors and steam hose must be matched in size to the diameter of
the steam outlets for the units:
UNIT MODEL NUMBER
UE001 UE003 UE005 UE008 UE009 UE010 UE015 UE025 UE035 UE045 UE065
No.
Cylinders 1
Steam
outlets 22mm x 1 30mm x 1 40mm x 1 40mm x 2
Duct steam distributors must also be matched to the duct size they will be inserted into:
Quantity Required per Unit
Humidifier Steam Outlet s, mm
22 30 40 2x40
Humidifier Steam Outlet s, in ches
7/8 1-1/4 1-5/8 2x1-5/8
Nominal Duct Siz e, In ches Distributor Length, Inches
Ordering
Code Description
UE 001,003
UE 005,008, 009,010,015
UE 025,035, 045HM,045HN
UE 045HW,045HK,065
22 mm Duct Distributors:
12 11.9 DP030D 22RU Duct steam distributor, 22mm, 12'', 20 l bs/hr 1
18 17.8 DP045D 22R0 Duct steam distributor, 22mm, 18'', 20 l bs/hr 1
24 23.7 DP060D 22R0 Duct steam distributor, 22mm, 24'', 20 l bs/hr 1
36 33.5 DP085D 22R0 Duct steam distributor, 22mm, 36'', 20 l bs/hr 1
30 mm Duct Distributors:
12 11.9 DP030D 30RU Duct steam distributor, 30mm, 12'', 33 l bs/hr 1
18 17.8 DP045D 30RU Duct steam distributor, 30mm, 18'', 42 l bs/hr 1
24 23.7 DP060D 30RU Duct steam distributor, 30mm, 24'', 42 l bs/hr 1
36 33.5 DP085D 30R0 Duct steam distributor, 30mm, 36'', 47 l bs/hr 1
48 41.4 DP105D 30R0 Duct steam distributor, 30mm, 48'', 47 l bs/hr 1
60 49.3 DP125D 30R0 Duct steam distributor, 30mm, 60'', 47 l bs/hr 1
72 65 DP165D 30RU Duct steam distributor, 30mm, 72'', 47 l bs/hr 1
40 mm Duct Distributors:
24 23.7 DP060D 40RU Duct steam distributor, 40mm, 24'', 99 l bs/hr 1 2
36 33.5 DP085D 40R0 Duct steam distributor, 40mm, 36'', 103 lbs/ hr 1 2
48 41.4 DP105D 40R0 Duct steam distributor, 40mm, 48'', 103 lbs/ hr 1 2
60 49.3 DP125D 40R0 Duct steam distributor, 40mm, 60'', 103 lbs/ hr 1 2
72 65 DP165D 40R0 Duct steam distributor, 40mm, 72'', 103 lbs/hr 1 2
84 80.8 DP205D 40R0 Duct steam distributor, 40mm, 84'', 103 lbs/ hr 1 2

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Distributor pipes should be mounted per the diagrams shown below, with a minimum of 6” from the center of
the distributor pipe to the top of the duct and 3” minimum to the bottom.
To install the distributor pipes:
1. Cut a key shaped hole in the side of the duct to match the steam pipe and condensate return.
2. Apply silicone sealant to the mounting plate and insert the pipe through the hole and secure it with 4 sheet
metal screws.
3. Connect the steam and condensate hoses using the hose clamps supplied.
(Note: end support bracked supplied only with 36” and longer distributors.)
IMPORTANT: Allow 2 feet of straight duct dow nstream of the distributor pipes when the air temperature
w ill be >55oF. Allow 3 feet of straight duct if the air temperature w ill be <50oF. Alw ays allow 2 feet
upstream. Turbulent air flow may require longer lengths.

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1.4.1B Room distribution blower units
Refer to the manual supplied with the Room Distribution Units for specifics on the blower units themselves.
Clearances required are shown below.
Model
UE001 UE003 UE005 UE008 UE009 UE010 UE015 UE025 UE035 UE045 UE065
Room Blower
Unit Model VSDU0A VRDXL
Rated Power
Watts 30 35
Air Volume
CFM 100 380
Noise Level
dBA 50 40
Operati ng Temp/Humidity
(°F / %RH)
14 t o 104°F
/ 10 to 60%
14 t o 140°F
/ 10 to 80%
Cold rooms can be humidified using a Room Distribution Unit, making sure that this operates within its
operating limits. The room must have operating temperatures of between -10°C and +20°C, with a percentage
of relative humidity of no greater than 80% RH. If these limits are not possible, the steam can be distributed in
the cold room using a distributor pipe in duct work. In any case, the steam must not come into direct contact
with air discharge from the refrigeration unit in the cold room, to avoid possible condensation.
VSDU0A
A B C D E F H
20 72 72 24 20 72 24
VRDXL
Minimum
dimension
(inches)
36 120 72 48 36 120 48

CAREL humiSteam
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1.4.2 Steam Hoses
NINETY PERCENT (90%) OF ALL OPERATION PROBLEMS ARE CREATED BY IMPROPER STEAM
PIPING FROM THE HUMIDIFIER UNIT TO THE DUCT DIS TRIBUTOR PIPES. To avoid these problems,
remember one simple fact when running the steam hose: steam naturally flows up hill, and condensate
naturally flows down hill. Run the steam hose or piping to avoid any kinks, sharp elbows, or low spots that could
collect or restrict the flow of steam to the distributor pipe, or the flow of condensate back to the humidifier.
Support the hose adequately to avoid sags.
The following diagrams are to provide you with some guidelines. If you have a situation you are unsure of,
please contact the factory for instructions.
IMPORTANT: Maximum length of rubber steam hose is 20 feet. Insulated copper tubing may be up to 40
feet. In all cases, minimize sharp bends and elbows – use 2-45°elbows instead of 90°s.
Hose size for UE 001, 003 = 22 mm.
Hose size for UE 005, 008, 009 and 015 = 30 mm.
Hose size for UE 025, 035, 045, 065 = 40 mm.
UE045 208-230V & UE065 need 2 hoses and distributors.

Installation, Operating & Maintenance Manual
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1.5 Power wiring
Check that the power supply voltage to be
connected matches the value indicated on the
rating plate inside the electrical panel. Insert the
power and ground connection cables into the
electrical panel compartment using the strain
reliefs supplied, and connect to the terminals.
An external fused disconnect must be installed.
All w iring must be in accordance with local,
state and national electric codes.
NOTE: to avoid unwanted interference, the
power cables should be kept separate from any
control wiring.
Per the table on the following page, make sure
that the unit has the proper number of turns
through the TAM (Torroid Amperage Monitor),
which is on the control board in models UE001
through UE015, and separate in models UE025
through UE065. Also make sure that the TA
Rate DIP switches on the control board are set
correctly per the table.
In models UE001 - UE015 make sure that the TAM on the
circuit board has the proper number of power wire turns
through it, and that the TA Rate DIP switches on the
control board are set per the table on the following page.
In models UE025 - UE065 the TAM is independent and the jumper must then be on the right terminals per the
table on the following page.
Singl
e Phase Terminals
Three Phase Terminals

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Model
Voltage
Code
Voltage
Phase
Nominal
Current
(Amps)
Power
(kW)
Output
(kg/hr)
Output
(lbs/hr)
Turns
Through
TAM
TA Rate
U 208 - 1~N 5.4 1 20
UE001 D 230 - 1~N 4.9 1.12 1.5 3.3 2 20
U 208 - 1~N 10.8 2 60
D 230 - 1~N 9.8 1 20
W 208 - 3~ 6.2 1 20
K 230 - 3~ 5.6 1 20
UE003
M 460 - 3~ 2.8
2.25 3 6.6
2 20
U 208 - 1~N 18 1 40
D 230 - 1~N 16.3 1 40
W 208 - 3~ 10.4 1 20
K 230 - 3~ 9.4 1 20
M 460 - 3~ 4.7 2 20
UE005
N 575 - 3~ 3.8
3.75 5 11
2 20
W 208 - 3~ 16.7 1 40
K 230 - 3~ 15.1 2 60
M 460 - 3~ 7.5 1 20
UE008
N 575 - 3~ 6
6 8 17.6
1 20
U 208 - 1~N 31.4 1 60
UE009 D 230 - 1~N 29.3 6.52 9 20 1 60
W 208 - 3~ 20.8 1 40
K 230 - 3~ 18.8 1 40
M 460 - 3~ 9.4 1 20
UE010
N 575 - 3~ 7.5
7.5 10 22
1 20
W 208 - 3~ 31.2 1 60
K 230 - 3~ 28.2 1 60
M 460 - 3~ 14.1 1 20
UE015
N 575 - 3~ 11.3
11.25 15 33
1 20
W 208 - 3~ 52 1 300
K 230 - 3~ 47.1 1 300
M 460 - 3~ 23.5 1 300
UE025
N 575 - 3~ 18.8
18.75 25 55
1 300
W 208 - 3~ 72.9 1 500
K 230 - 3~ 65.9 1 500
M 460 - 3~ 32.9 1 500
UE035
N 575 - 3~ 26.4
26.25 35 77
1 300
W 208 - 3~ 93.68 1 500
K 230 - 3~ 84.72 1 500
M 460 - 3~ 42.4 1 500
UE045
N 575 - 3~ 33.9
33.75 45 99
1 500
M 460 - 3~ 61.19 1 300
UE065 N 575 - 3~
48.95 48.75 65 143 1 300
NOTE: Tolerance allowed on main voltage = -15%, +10%

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1.6 Connect Control Wiring
A typical humidifier control system includes a wall or return duct sensor or controller, a high limit duct humidistat
and an air-proving switch. Placement of these devices is critical to proper operation of the overall system.
1.6.1 Controls Placement
(See following diagram)
The return air RH sensor must always be located BEFORE any outside air intake, in order to insure accurate
sensing of the air from the space. Alternatively, a room RH sensor or humidistat can be used. Room sensors
should be located on an inside wall or post and should not be hit by any discharge air streams from ducts. In a
100% outside air system, the RH sensor may be placed in the supply duct, at least 10 feet down stream of the
distributor pipe to act as both hi-limit and control.
The airflow sw itch must be positioned to accurately open on a loss of airflow, to prevent the humidifier from
running when there is no air to absorb the moisture.
The hi-limit humidistat must be positioned far enough down stream of the steam distributor pipe(s) to prevent
it from getting wet, but still allow it to accurately prevent over humidification of the duct that could result in
condensation.
1.7 Control wiring
The HumiSteam control system allows up to two sensors to be
connected, as well as various safety devices, remote on/off,
alarm and serial communications.
Generally, the control sensor or humidistat (HT) is located in
the room or return air duct. In the case where the HumiSteam
uses a direct discharge blower unit, this is the only control
needed. In ducts or air handlers, a high limit humidistat or
sensor is usually added to act as a safety (CR), as well as an
air flow proving device. The remote terminal HumiVisor (MT)
may be added.

CAREL humiSteam
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Remote Supervisor / Serial Communications:
This is a standard RS485 serial connection. It is recommended to keep
wiring under 3,200 feet. Request Carel’s communications documentation
for additional information on this option.
Control wiring is made directly to the control
board terminals:
1. terminal block G (dehumidification
contact);
2. terminal block H (alarm contact);
3. terminal block K (on/off, manual drain
switch);
4. terminal block I (control signals);
5. terminal block J (to remote terminal or
supervisory system);
6. dip-switch for selecting TA RATE.
For On/Off Operation:
Connect any simple humidistat, high-limits, air
flow switch, and remote contacts in series from
terminals 7I to 8I. DO NOT apply any v oltage
to 7I & 8I.
Circuits must be completed from 4I to 5I by a
jumper and from 7I to 8I for the unit to operate.
Use jumpers if devices are not connected.
Parameter A0 must be set to 0.

Installation, Operating & Maintenance Manual
19
For Modulating Operation w ith External Controller:
Connect any external controller (0-1 Vdc, 0-10 Vdc
Parameter A0 must be set to 1.
Parameter A2 must be set per the OUT signal from the
regulator:
• voltage: 0 to 1 Vdc; 0 to 10 Vdc; 2 to 10 Vdc;
• current: 0 to 20 mA; 4 to 20 mA.
NOTE: Safeties are high-limit humidistat, air flow switch,
and/or external enable. DO NOT apply any v oltage to
7I & 8I.
For Stand-Alone Modulating Operation:
Connect a high limit sensor and control sensor per the
diagram at right. DO NOT apply any v oltage to 7I
& 8I.
Parameter A0 must be set to 2 if no high limit
sensor, 3 if a high limit sensor is used.
Parameter A2 must be set per the OUT signal from
the sensor:
• voltage: 0 to 1 Vdc; 0 to 10 Vdc; 2 to 10
Vdc;
• current: 0 to 20 mA; 4 to 20 mA.
Terminal 4I (+(G)) = 12 Vdc
Terminals 2I & 6I (M) = common
For Steam Baths (Turkish Baths):
In this case a temperature sensor is used to control
the humidifier. Connect sensors per the diagrams below.
Parameter A0 must be set to 4. Parameter A2 must be set to 0.
Alarm Output:
The H terminals allows connection to an on-board SPDT alarm relay that
provides No and NC contacts for remote indication of alarms.
Dehumidify Output:
Dehumidify contacts are also provided which can be used to control a dehumidifier
from the humidifier control system (stand-alone modulating mode only). The
contact is rated for 250 Vac, 8 Amp resistive and 2 Amp inductive loads.

CAREL humiSteam
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ASWH / ASDH – ASDH / ASDC Wall – Duct Temperature/Humidity Sensors
Model Description
Humidity (0-1 VDC or 4-20 mADC)
ASWH100000 Wall Hu midit y s ensor (replaces SHWO OP)
ASDH10 0000 Duct Hu midit y sensor (repl aces SSDOMH00/1)
Temperature & Humidity (NTC temp, 0- 1 VDC or 4-20 mADC humidity)
ASWC111000 Wall Temp/ hum s ens or (replaces SWNTCTH0/1 & STHONTC0/1)
ASWC110000 Wall Temp/ hum s ens or (replaces STHOAP)
Temperature & Humidity (0-1 VDC or 4-20 Mad c temp & humidity)
ASDC11 1000 Duct temp/hum s ens or (replac es SDNTCTH0/1)
ASDC11 0000 Duct temp/hum s ens or (replac es SSDOMHT0/ 1)
Temperature: NTC thermistor, 10 Kohm at 25°C (77°F)
(ASWC/ASDC onl y)
Accurac y: +- 0.25°C from 0 to 50°C (32 to 122°F)
Humidity: Thi n film capacitor
Linear 0-1 Vdc or 4-20 mAdc from 10 t o 90%RH
Accurac y: +- 3%RH fr om 20 to 90%RH
calibrated at 55%RH and 25°C (77°F)
+- 5%RH above 90%RH and below 20%RH
Response time: 60 sec onds
Power: 12 to 24 Vac/dc or +12 to –12 Vdc
Housing: Wall: ABS with glassfiber fill
Certifications: Calibrated to NIST traceable
humidity/temperature s tandar d, CE Approved