Stulz ENS Series User manual

STULZ UltraSonic



ENS 14 A ENS 18 A
Original instructions
- Read carefully before use -
- Keep for later reference -
Index 1000720 EN
Issue 08.2016


STULZ GmbH


ABOUT STULZ
Since it was founded in 1947, the STULZ company has
evolved into one of the world’s leading system suppliers
of air-conditioning technology. With the manufacture of
precision air-conditioning units and chillers, the sale of

and object management, this division of the STULZ Group
achieved a turnover of around 370 million euros in 2014.
Since 1974 the group has seen continual international
expansion of its air conditioning technology business, spe-
cialising in A/C for data centres and telecommunications
installations. STULZ employs 2,200 workers in Germany
and seventeen subsidiaries (in France, Italy, Great Britain,
Belgium, Brazil, the Netherlands, New Zealand, Mexico,
Austria, Poland, Spain, Singapore, China, India, South
Africa, Australia and the USA). The company also co-
operates with sales and service partners in over 130 other
countries, and therefore boasts an international network
of air-conditioning specialists. It has production plants in
Germany, Italy, the USA, 2 in China, Brazil and India. The
STULZ Group employs around 5,300 people worldwide,
with current annual sales of around 950 million euros.

STULZ UltraSonic


Dear Customer,
Many thanks for choosing to buy a STULZ product. STULZ has been a purveyor of sophisti-
cated technical solutions for comfort
and precision air conditioning applications since 1947.
Best regards,
STULZ GmbH
For general inquiries our hotline is available
at 
Our service hours are weekdays from 7am – 4pm.
For further information concerning our
products and services visit our website :
www.stulz.com

© STULZ GmbH, Hamburg DE / 06-2016 / 1000687
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STULZ UltraSonic -System for duct humidication ENS 14 A - 18 A-
CONTENT
1. INFORMATION ON THIS DOCUMENT .................................................3
1.1. Validity ......................................................................3
1.2. Target group .................................................................3
1.3. Conventions regarding illustrations ................................................3
1.4. Abbreviations ................................................................3
1.5. Formatting ...................................................................5
1.6. Nomenclature ................................................................5
1.7. Liability claims for defects .......................................................5
1.8. Exclusion of liability ............................................................5
1.9. Copyright ....................................................................5
2. SAFETY .........................................................................6
2.1. Proper use ..................................................................6
2.2. Basic safety instructions ........................................................7
2.3. Qualication requirements for personnel ...........................................8
2.4. Compatible products ...........................................................8
2.5. Other applicable documents .....................................................9
2.6. Transport and storage ..........................................................9
2.7. Installation ...................................................................9
2.8. Spare parts ..................................................................9
3. PRODUCT PACKAGE .............................................................10
3.1. Optional accessories .........................................................11
4. PRODUCT DESCRIPTION ..........................................................12
4.1. Sizes ......................................................................13
4.2. Rating plate .................................................................13
4.3. Description of unit ............................................................14
4.4. Operating principle of ultrasonic humidication .....................................15
4.5. Technical data ...............................................................16
4.6. Dimensional drawing ..........................................................17
4.7. Application limits .............................................................18
4.8. Service life of materials ........................................................19
4.9. Water treatment .............................................................20
4.10. Use in conformity with requirement of hygiene ......................................22
5. DESIGN AND PLANNING ..........................................................24
5.1. Humidier distance ...........................................................25
5.2. Applications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
5.2.1. Comfort applications ..................................................26
5.2.2. Equipment room applications ...........................................26
6. OPEN-LOOP AND CLOSED LOOP CONTROL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
6.1. Master/slave control cabinet for ultrasonic humidier (USM/USS controller) ...............28
6.2. Accessory sets (controlled by on-site switch gear cabinet) ............................29
7. I N STA L L ATION ...................................................................31
7.1. Installation diagram ...........................................................32
7.2. Installation clearances ........................................................33
7.3. In-duct installation ............................................................34
7.3.1. Hole spacing ........................................................36
7.3.2. Installation examples ..................................................36
7.3.3. Example frame ......................................................37
7.3.4. Installation accessories ................................................38

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STULZ UltraSonic -System for duct humidication ENS 14 A - 18 A-
7.4. Connecting water supply line(s) .................................................40
7.4.1. Connecting the pipe for the demineralized drinking water .....................42
7.4.2. Waste water connection ...............................................44
7.4.2.1. Overview connection ............................................45
7.4.2.2. Drain connection ...............................................46
7.5. Electrical connection ..........................................................48
7.5.1. Connecting cables between the humidier and control cabinet .................48
7.5.1.1. Connection of humidier to USM control cabinet ......................50
7.5.1.2. Connection of humidier to USS control cabinet ......................50
7.5.1.3. Connection of humidier accessory sets ............................51
7.5.2. Cable dimensions ....................................................51
7.5.3. Internal wiring .......................................................53
8. START- UP .......................................................................54
8.1. Reports and checklists for STULZ UltraSonic humidiers .............................56
9. OPERATION .....................................................................57
9.1. Operation ..................................................................58
9.1.1. Using the USM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59
9.1.1.1. Changing the menu levels ........................................59
9.1.1.2. Setting the operating mode .......................................61
9.1.1.3. Setting the setpoint .............................................63
9.2. Booster fan (optional) .........................................................65
9.2.1. Description of booster fan ..............................................65
9.2.2. Booster fan technical data ..............................................65
9.2.3. Dimensional drawing of booster fan ......................................66
9.2.4. Installing the booster fan ...............................................67
10. DECOMMISSIONING ..............................................................69
10.1. Switching off ................................................................69
11. MAINTENANCE ..................................................................70
11.1. Maintenance cycles ..........................................................71
11.2. Checklist for hygiene checks ...................................................72
11.3. Visual inspection .............................................................73
11.4. Cleaning ...................................................................74
11.4.1. Cleaning water-bearing parts ...........................................74
11.4.2. Cleaning the water tank, oscillators and mist outlets .........................75
11.5. Inspecting the electrical system .................................................78
11.5.1. Replacing the relay PCB ...............................................80
11.5.2. Replacing the ll valve and oat switch ...................................81
11.5.3. Replacing oscillators and the atomizer PCB ...............................83
12. DISMANTLING AND DISPOSAL .....................................................87
12.1. Dismantling .................................................................87
12.2. Disposal ...................................................................87
13. SPARE PARTS LISTS .............................................................88
14. EXPLODED VIEW ................................................................94
15. TROUBLESHOOTING .............................................................95
16. MAINTENANCE CHECKLIST ........................................................99
17. START-UP CHECKLIST ...........................................................101
18. HUMIDIFICATION TEST REPORT ...................................................103

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STULZ UltraSonic -System for duct humidication ENS 14 A - 18 A- Information on this document
1. Information on this document
This Technical Manual contains detailed information on installation, conguring the implemented
programs,
and troubleshooting.
The Technical Manual must be kept on site at the location of use and be available at all times.
Make sure that persons responsible for operating the product and working on the product have fully read
and understood this guide. If you have any questions, please call the hotline.
1.1. Validity
This Technical Manual applies to STULZ UltraSonic humidiers UltraSonic ENS 14 A - ENS 18 A.
1.2. Target group
This document is intended for qualied electricians and specialist planners. The work described in this
document may only be performed by persons with the requisite qualications (see "2.3. Qualication
requirements for personnel" on page 8).
1.3. Conventions regarding illustrations
Safety and warning notices are indicated by signal words. The signal words indicate hazard levels with a
risk of injury of varying degrees of severity. The signal word IMPORTANT indicates a risk of property
damage.
Signal word Meaning Consequences of failure to observe
DANGER Immediate threat of danger Death or serious injury through a high-risk hazard
WARNING Immediate threat of danger Death or serious injury through a medium-risk hazard
CAUTION Immediate threat of danger Slight injury through a low-risk hazard
IMPORTANT Immediate threat of danger Damage to property or the environment
Note Special notes on optimum use of the product
1.4. Abbreviations
Abbreviation Name Explanation
AAmpere SI unit: electrical current
Acable cross-section in mm2
AC Alternating current ─
ENS Economy Nebuliser Small Ultrasonic humidier for duct applications
CH Relay panel
DC Direct current ─
DIP Dual in-line package Describes small switches with 2 parallel terminal strips

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Information on this document STULZ UltraSonic -System for duct humidication ENS 14 A - 18 A-
Abbreviation Name Explanation
FS Float switch ─
GND Ground Ground wire or signal ground
HR Auxiliary relay
iVoltage drop in V
ICurrent in A
kg/h Kilograms per hour Composite unit for mass owrate
KKelvin SI unit: Temperature
CFU Colony forming unit
Unit used to quantify microorganisms when the number of
viable microorganisms in a material is determined by
culturing.
LPipe length in m
LED Light-emitting diode ─
l/h Liters per hour Composite unit for volumetric owrate
mMeter SI base unit: Length
min Minute SI unit: Time
N Neutral wire ─
NB Nebuliser ─
NC Normally closed Relay is closed without current
NO Normally open Relay is open without current
rF Relative humidity in %
sSecond SI base unit: Time
SV Solenoid valve ─
TCycle time ─
ti Pulse time ─
TP ─Thermostat
tp Rest time ─
tw Delay time ─
UpSupply voltage ─
Uout Output voltage ─
Uin Input voltage ─
USM UltraSonic Master ─
USS UltraSonic Slave ─
VVolt SI unit: electrical voltage
ΩOhm SI unit: electrical resistance
µS/cm Microsiemens per centimeter electrical conductivity
°eH English degree of hardness hardness of water

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STULZ UltraSonic -System for duct humidication ENS 14 A - 18 A- Information on this document
1.7. Liability claims for defects
Following the assembly and operating instructions in this Technical Manual is a prerequisite for trouble-
free operation of the STULZ UltraSonic ENS ultrasonic humidier and for potential claims for defects.
Read the Technical Manual before working with the product.
1.8. Exclusion of liability
Following the assembly and operating instructions in this Technical Manual is a prerequisite for safe
operation of the product and for attaining the specied product characteristics and performance features.
STULZ shall not be liable for any injury or property damage or any nancial loss resulting from
non-compliance
with the assembly and operating instructions. In such cases, all liability for material defects is
excluded.
1.9. Copyright
All brand and product names are trademarks or registered trademarks of the products bearing these
names. UltraSonic® is a registered trademark of STULZ GmbH.
All rights reserved, including in respect of this translation. No part of this document may be reproduced in
any form (e.g. printing, photocopying, microlm, data transfer or other method) or duplicated or pro-
cessed by electronic means, without the written consent of STULZ GmbH.
Technical data subject to change without notice.
1.5. Formatting
Format Name Example
bold
Operating states
Values that require setting
ON or OFF.
Set the voltage to 7,5 V.
italic References in the document Prerequisite, procedure, result
„ XX“Buttons Press the „►“ button
1.6. Nomenclature
Full name Name in this document
STULZ UltraSonic ENS ultrasonic humidier Ultrasonic humidier
STULZ UltraSonic Master USM
STULZ UltraSonic Slave USS

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Safety STULZ UltraSonic -System for duct humidication ENS 14 A - 18 A-
2. Safety
The plant operator must ensure that the safety and warning IMPORTANTs in this documentation are
observed
and adhered to. The plant operator must furthermore ensure that any persons working on the system
have read and understood the documentation in its entirety. The documentation must always be kept in
the same place as the equipment.
Failure to observe the safety and warning IMPORTANTs may put personnel, the environment and the
system at
risk and voids all entitlement to claims for material defects.
Safe operation of the system is only ensured if it is used in accordance with its proper use. The limit
values set out in the technical data must never be exceeded.
If anything is unclear or you require additional information, please call STULZ Technical Support.
2.1. Proper use
The STULZ UltraSonic ENS model series is designed for duct humidication through the ultrasonic ato-
mization of demineralized drinking water. The STULZ UltraSonic ENS model series is intended
solely for indoor use, and may only be used with compatible products. Any other use besides or beyond
this shall be regarded as improper use. STULZ cannot be held liable for damages resulting from the
above. The risk shall be borne by the plant operator alone.
Use of any other supplied media requires the approval of STULZ.
The system may only be used in accordance with the technical documentation from STULZ and the data
on the rating plate.
The following uses of the unit are prohibited:
●Use of the unit outdoors.
●Use of the unit in potentially explosive atmospheres.
●Use of the unit in ventilation systems.
●Use of the unit without treated drinking water of the specied quality.
●Use of the unit under water.
●Use of the unit with media other than those approved by STULZ.
●Use of the unit outside the application limits.

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STULZ UltraSonic -System for duct humidication ENS 14 A - 18 A- Safety
CAUTION
Risk of injury from rotating parts.
Touching rotating parts carries a direct risk of injury due from mechanical forces.
The STULZ UltraSonic ENS ultrasonic humidier may only be installed, connected and started up by
specialist engineers..
●Before any repairs and maintenance work, always switch off the power supply to the system and-
the unit, and secure so they cannot be switched back on for the duration of the work.
CAUTION
General risks of injury.
• Make sure that all persons and specialist engineers wear the appropriate protective equipment
(gloves, helmet, safety goggles) for their work .
• Make sure that all transport, storage, installation, start-up, maintenance and disposal work is
performed solely by appropriately qualied specialist personnel. The qualication requirements for
specialist personnel are listed in section "2.3. Qualication requirements for personnel" on page 10.
• Make sure that the unit is only opened by qualied specialist personnel.
• Make sure that applicable documents are observed during transport, storage, installation, start-up,
maintenance and disposal. Other applicable documents are listed in section "2.5. Other applicable
documents" on page 11.
• Units must be stationary and switched off before any work is carried out. The unit must be discon-
nected from the mains power for any maintenance work and a warning sign afxed to prevent it
from being inadvertently switched on. Before restarting, the preparatory measures in the Installati-
on/ Start-up section must be carried out.
• The units may only be converted or modied following consultation with STULZ GmbH. Genuine
spare parts and parts/accessories approved by STULZ GmbH are a guarantee of safety.
• Never operate the system without the necessary protective covers.
• Before any work on the electrical installation, switch off the power supply to the unit and all connec-
ted components and secure so they cannot be switched back on.
• The regulations from professional associations must be complied with.
VORSICHT
Danger of death. Electric shock risk.
There is an immediate danger of death from electric shock if live parts are touched.
The STULZ UltraSonic ENS ultrasonic humidier may only be installed, connected and started up by
specialist electricians.
●To change the settings of DIP switches or to remove the connections, always switch off the power-
supply to the system and the unit, and secure so they cannot be switched back on for the duration
of the work..
WARNUNG
DANGER
2.2. Basic safety instructions

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Safety STULZ UltraSonic -System for duct humidication ENS 14 A - 18 A-
VORSICHT
Danger due to incorrectly congured components..
During installation and conguration, it may be necessary to additionally congure further components
for use with the STULZ UltraSonic ENS ultrasonic humidier.
●Before start-up, always check the current conguration of all affected components (refer also to the
documentation of the respective components).
IMPORTANT
2.3. Qualication requirements for personnel
All electrical work must be performed exclusively by authorized specialist electricians. Specialist person-
nel within the context of this documentation are persons who are familiar with the electrical installation,
start-up, maintenance and repair of the system, and are in possession of the following qualications:
●Successful, certied completion of training in electrical engineering
●Familiarity with the technical documentation
All water installation work must be performed exclusively by authorized and trained specialist personnel.
Specialist personnel within the context of this documentation are persons who are familiar with the elec-
trical installation, start-up, maintenance and repair of the system, and are in possession of the following
qualications:
●Instruction by an expert
●Familiarity with the technical documentation
All work relating to transport, storage and operation must be performed exclusively by persons who have
received instruction in such work.
The plant operator must ensure that all maintenance, inspection and installation work is performed by
authorized and qualied specialist personnel who have been briefed by thoroughly studying the technical
documentation.
2.4. Compatible products
The STULZ UltraSonic ENS ultrasonic humidier is compatible with the following STULZ products:
●STULZ ion exchanger SD 2800
●STULZ UltraWater reverse osmosis system
●STULZ conductivity measuring kit
●STULZ USM control cabinets USM 1303, USS 1303

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STULZ UltraSonic -System for duct humidication ENS 14 A - 18 A- Safety
2.5. Other applicable documents
Besides this technical documentation, the following documents must also be observed:
●Circuit diagrams of the control system used
●Technical documentation of the control system used
●Technical documentation of the measurement equipment used
●Technical documentation of other accessories
●Technical documentation of the water treatment equipment used
●STULZ Ultrasonic Planning Guide
●Certicates:
- Expert statement "Spreading of Legionella pneumophila in ultrasonic humidiers"
- Certicate "Hygienic assessment of ultrasonic humidiers in the UltraSonic series"
- CE Declaration
2.6. Transport and storage
Check the delivery immediately on receipt for completeness and transport damage. Notify your specialist
retailer of any transport damage immediately. Do not install or operate the unit if there is evidence of
transport damage which may jeopardize the unit's operating safety.
The unit is packaged in a cardboard box. Open the box carefully to prevent damage to the unit's surface.
If the unit is to be placed in interim storage after delivery, take the following precautions for protection
against corrosion and damage:
• Store the unit in a dry location,
• Store the unit in its packaging if possible.
• Seal water connections with protective caps
Dispose of the packaging properly. To avoid the risk of asphyxiation, keep plastic packaging out of reach
of children and dispose of it after opening.
2.7. Installation
When installing the unit, always observe the notes on installation (see "7. Installation" on page 31) and
the power supply specications (see "4.5. Technical data" on page 16).
The electrical installation and wiring must comply with the applicable local regulations, and the
specications of the VDE (German Association for Electrical, Electronic & Information Technologies) and
the local mains grid operator.
2.8. Spare parts
We recommend the use of genuine spare parts. Genuine spare parts and spare parts/accessories
approved by STULZ GmbH are a guarantee of safety.
The spare parts list can be found in the following section: "13. Spare parts lists" on page 90. To order
spare parts, call the hotline or your specialist retailer.

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Product package STULZ UltraSonic -System for duct humidication ENS 14 A - 18 A-
Noise Filter \2,700
ZAC2210-00U
Not
available
45 ﾉｲｽﾞﾌｨﾙﾀｰ ZAC2210-00U
STE045
M25121
Ring and Nut for \560
Tube (10sets)
46 ﾘﾝｸﾞﾅｯﾄｾｯﾄ（ﾒｯｷ付）
STE046
47
48
6mm I.D.
6/6
(Example: ENS 14 A)
VORSICHT
Item numbers.
The item numbers stated here are based on section "13. Spare parts lists" on page 90 in this manual.
Note
3. Product package
●STULZ UltraSonic ENS ultrasonic humidier
●Quick-start Guide to STULZ UltraSonic ENS ultrasonic humidier
The Technical Manual and Start-up Report of the STULZ UltraSonic
ENS ultrasonic humidier are available to download at www.stulz.com.
Illustration Description Item
ENS 14 A - 18 A ---
STULZ UltraSonic ENS Quick-start Guide ---
Threaded joint for stainless steel tube
Connection 6 mm 1 x item 29
3-way main cable
ENS 14 A - 18 A 1 x item 19
4-way main cable
ENS 14 A - 18 A 1 x item 20
Connector
for PE plastic tube
connection 6 mm
1 x item 30
SCHNELLSTARTANLEITUNG
CompTrol Interface III k
VERSION 06.2015 | 1000647 | DE
STULZ UltraSonic
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ENS14 A
ENS18 A
Index1000713EN
Issue07.2016
Cord
main
with metal
connector
4pin 4m
STEL024
M25370
Cord control
with stainless steel
connector
3pin 2m
STEL012
M01865
Cord main
with stainless steel
connector
4pin 2m
STEL011
M01862
Cord
control
with metal
connector
3pin 4m
STEL042
M75808
Cord
main
with metal
connector
4pin 4m
STEL043
M75809
1
1
1
1
1
1
1
1
1
1
Cord
main
with metal
connector
4pin 4m
STEL024
M25370
Cord control
with stainless steel
connector
3pin 2m
STEL012
M01865
Cord main
with stainless steel
connector
4pin 2m
STEL011
M01862
Cord
control
with metal
connector
3pin 4m
STEL042
M75808
Cord
main
with metal
connector
4pin 4m
STEL043
M75809
1
1
1
1
1
1
1
1
1
1

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STULZ UltraSonic -System for duct humidication ENS 14 A - 18 A- Product package
3.1. Optional accessories
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© STULZ GmbH, Hamburg
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1.3 Lieferumfang
Wasserhahn 12 Liter Wasserspeicher Gehäuseschüssel
Ventil
Zuleitung
Drainageanschluss /
Abflussventil Brauchwasser
Wasseranschlussadapter
Kugelventil
Wasserspeicher
UV-RöhreVerbindungsschlauch
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11
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© STULZ GmbH, Hamburg
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3.2 Stadtwasseranschluss
Wasseranschlussadapter Zuleitungsventil
Der zum Lieferumfang gehörende Stadtwasseranschluss besteht aus einem Wasseranschlussadapter
½" AG x ½" IG und einem Ventil für die Zuleitung zur Umkehr-Osmose-Anlage mit einem ¼" x ¼" Gewinde.
Beim Zusammenbau des Stadtwasseranschlusses werden um das Außengewinde des Zuleitungsventils
3 bis 4 Lagen Teflonband gewickelt und dieses dann seitlich in den Wasseranschlussadapter geschraubt.
Verbindung zur Umkehr-Osmose-Anlage
Zuleitungsventil
Anschluss an das Anschluss des vorhandenen
Stadtwasser Wasserhahns
Abwasser
Trinkwasser
Abwasser
Systemskizze für Ultrasonic BNB1000A - BNB8000A mit proportionaler Steuerung
Spannungsversorgung
230V/50-60Hz/1Ph
Spannungsversorgung
230V/50-60Hz/1Ph
Abwasser
Trinkwasser
Abwasser
Systemskizze für Ultrasonic BNB1000A - BNB8000A mit proportionaler Steuerung
Spannungsversorgung
230V/50-60Hz/1Ph
Spannungsversorgung
230V/50-60Hz/1Ph
Illustration Description K-number
SD 2800 ion exchanger K85802
STULZ UltraWater reverse osmosis system
SUW 120
SUW 400
1200256
1200257
Conductivity measuring kit K85571
USM master/slave control cabinet
USM1303
USS1303
K87552
K87553
Stop cock K87624
Flush valve
NC/48V AC K87061
Stainless steel tube by the meter
PE plastic tube by the meter
K87059
K87060
accessories for installation see p.38
Booster fan ENS 14 A: K87034
ENS 18 A: K87035
(1 : 2)
Stückliste / BOM
Gew.WerkstoffArtikelHalbz. / Abm.NormRevZeichnungs-NrBenennungAnzPos
0,122 kg
AlMg3 (AW-5754/3.3535)
---
PL1 x 185x375DIN EN 485-300US-ZUB-16-0023Lochblech11
0,026 kg
AlMg3 (AW-5754/3.3535)
---
PL1 x 25,3x375DIN EN 485-300US-ZUB-16-0033Klemmschiene12
0,000 kg
-
12211252,5
- -
Niet53
Werkstoff (material) Projekt (project)
Norm (standard specification) Bestell - Nr. (order-No.)
Bemerkungen (comments)
Format (size):
Haupt-Maßstab (main scale):
Fertiggewicht (weight netto):
Zust.
(Index)
Datei (File):
Änderungsnummer
(Change - No.) Datum
(Date) Name (Name)
Datum (Date) Name (Name)
Bearbeitet
(Coord.)
Geprüft
(Checked)
Genehmigt
(Approved)
Maße ohne Toleranzangabe
(Measures without specification of tolerances)
DIN ISO 2768 - mK
Plotdatum:
Blatt (sheet)
/
Entstanden aus (Orig. of):
Version:
V28
US-ZUB-16-0013-00_M03189_LochblechKomplett-ENS3600A.idw
24.06.2016 Schönfeldt
A2
Lochblech komplett
ENS 3600 A
US-ZUB-16-0013
1
s. Tabelle -
-
-
1
0,148 kg
Vertrauliches Dokument. Eigentum vonStulz GmbH.
Die Vervielfältigung oder Weitergabe diesesDokumentes sowie
die Nutzung oder Weitergabe seines Inhaltes
ist ohne ausdrückliche schriftliche Genehmigungnicht gestattet.
Alle Rechte vorbehalten.
Proprietary and confidential information ofStulz GmbH.
Copying or distribution of this document and
the use or communication of its contents
are prohibited without prior writtenconsent.
All rights reserved.
Pinto
Pinto
Halbzeug/Abmessungen (raw dim.)
Benennung (title)
Zeichnungsnummer (drawing number):
1:1
Artikel-Nr. (article no.)
M03189
DIN ISO 1101
Form- und Lagetoleranzen:
(tolerancing of form and location)
Oberfläche (surfaces):
DIN ISO 1302
STULZ GmbH
Holsteiner Chaussee 283
22457 Hamburg
Germany
Oberflächenbehandlung (surface)
-
00
Revision:
375
185
1,5
2
3
1
88
23

2
vorläufig / PRELIMINARY
11,5 2
88 88 88

DE / 06-2016 / 1000687 © STULZ GmbH, Hamburg
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Product description STULZ UltraSonic -System for duct humidication ENS 14 A - 18 A-
The STULZ UltraSonic ENS model series is designed for duct humidication using ultrasonic atomiza-
tion. Here, a transducer installed in a water bath produces a cold mist, which is expelled out of the unit
into the duct due to the air ow within the duct.
4. Product description
Mist guide tube
Control box
Connectors
Cable voltage supply
Mark for direction
of air ow
ENS4800
CAUTION
Property damage due to an incorrect water supply.
The ultrasonic humidier is operated with demineralized drinking water, to ensure that the transducers
retain their function throughout the unit's service life. Furthermore, if the mineral content of the water is
too high for the planned application, this may lead to the formation of deposits in the humidified room.
●Check the mineral content and conductivity of the drinking water to prevent damage to property!
IMPORTANT

© STULZ GmbH, Hamburg DE / 06-2016 / 1000687
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STULZ UltraSonic -System for duct humidication ENS 14 A - 18 A- Product description
4.1. Sizes
The STULZ UltraSonic ENS model series is available with different humidier capacities:
• ENS 14 A (Art.Nr.: K 87009)
• ENS 18 A (Art.Nr.: K 87010)
Technical features:
• 14 - 18 kg/h humidier capacity
• 24-30 integrated transducers
• Stainless steel housing WNr. 1.4301 (X5CrNi18-20) + WNr. 1.4106 (X2CrNi19-11)
CAUTION
Adiabatic behavior.
STULZ UltraSonic humidiers atomize the water in minuscule droplets (< 0.001 mm). The mist (aero-
sols) produced in this way draws heat from the surrounding air (enthalpy) and changes its state from u-
id to aqueous. This "adiabatic" behavior (removal of heat from surrounding air) cools the air in the room.
Note
4.2. Rating plate
The rating plate contains the most important data for identication of the STULZ UltraSonic ENS ultra-
sonic humidier and about the application limits. The rating plate is afxed to the side of the humidier.
The data on the rating plate are required for the following:
●Safe use of the STULZ UltraSonic ENS ultrasonic humidier
●When phoning the STULZ hotline with questions
The rating plate must be permanently afxed to the humidier.
Model
Example
rating plate
Manufacturer's
address
STULZ GmbH Klimatechnik 22457 Hamburg Tel: [phone]
Typ ENS 14 A Aufnahmeleistung/
power consumption 65 W
Leistung/
capacity 14 l/h Spannung/ power supply 48 V~

DE / 06-2016 / 1000687 © STULZ GmbH, Hamburg
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Product description STULZ UltraSonic -System for duct humidication ENS 14 A - 18 A-
4.3. Description of unit
Units in the UltraSonic ENS model series 14 A to ENS 18 A are duct humidiers that work on the princi-
ple of ultrasonic atomization of demineralized drinking water. The principal components of this device are
made from stainless steel or high-grade plastic. The humidier is fully assembled, internally wired and
leak tested at the factory, where it also undergoes testing under standard operating conditions.
The polished stainless steel housing with removable stainless steel hood contains ultrasonic atomization
modules, a solenoid valve and two oat switches.
The compact UltraSonic atomization module is mounted on the oor of the water tank. To increase op-
erational reliability, each transducer has its own electronics, consisting of a rectier, vibration circuit and
transistor amplier. The ultrasonic vibrations produced in this way are aimed at the surface of the water,
which is then atomized.
The airow in the duct distributes the mist produced in the water tank around the room.
To prevent larger droplets in the airow, the mist is blown out by specially shaped mist guide tubes. The
unit has an air bypass as standard, which allows mechanical calibration of the effective humidifying
output.
Water is supplied by an inlet valve with an integrated stainless steel lter strainer, which is protected
against overheating if it were to run dry. The water level is controlled by hermetically sealed, dust-insensi-
tive magnetic oat switches, which additionally monitor unwanted dry running.
To achieve optimum atomization, the water level in the tank must be kept as constant as possible. In ad-
dition to the oat switches, the solenoid valve also assists with automated monitoring of the water supply.
If the water in the tank falls below the normal level, the upper oat switch switches and the solenoid valve
opens the water supply to the tank. Once the normal water level is reached, the solenoid valve is closed
once more.
Operating the humidier with an inadequate water level damages the transducers. To prevent this, the
lower oat switch switches and operates a relay in the control cabinet, which turns off the power supply
to the unit if the water falls below the safety level:
In addition, a thermostat switches the power off if the temperature in the ultrasonic humidier rises above
a preset threshold. Varistors are installed to protect the electronics from voltage peaks.
EN / 06-2015 / 1000610 © STULZ GmbH, Hamburg
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Product description  STULZUltraSonic-SystemforDirectRoomHumidicationBNB-
4.3. Description of unit
UnitsintheUltraSonicBNBmodelseries1000AtoBNB8000Aaredirectroomhumidiersthatwork
on the principle of ultrasonic atomization of demineralized drinking water. The principal components of
this device are made from stainless steel or high-grade plastic. A fan integrated in the housing distributes
thecoldmist,whichisgeneratedinthewatertank,aroundtheroom.Thehumidierisfullyassembled,
internally wired and leak tested at the factory, where it also undergoes testing under standard operating
conditions.
The polished stainless steel housing with removable stainless steel hood contains ultrasonic atomization
modules,asolenoidvalveandtwooatswitches.Theairintakefeaturesamaintenance-friendlyinsert
withstainlesssteelguiderails,inwhichawashabledustlterisinserted.
ThecompactUltraSonicatomizationmoduleismountedontheoorofthewatertank.Toincrease
operationalreliability,eachoscillatorhasitsownelectronics,consistingofarectier,vibrationcircuitand
transistoramplier.Theultrasonicvibrationsproducedinthiswayareaimedatthesurfaceofthewater,
which is then atomized.
Thefandistributesthemistproducedinthewatertankaroundtheroom.Avariableairowisgenerated,
to ensure that the aerosols dissipate rapidly.
Topreventlargerdropletsintheairow,themistisblownoutbyspeciallyshapedmistguidepipes,con-
taining a droplet strainer and featuring a soft plastic wiper ring at the outlet. The unit has an air bypass as
standard, which allows mechanical calibration of the effective humidifying output.
Waterissuppliedbyaninletvalvewithanintegratedstainlesssteellterstrainer,whichisprotected
against overheating if it were to run dry. The water level is controlled by hermetically sealed, dust-insen-
sitivemagneticoatswitches,whichadditionallymonitorunwanteddryrunning.
To achieve optimum atomization, the water level in the tank must be kept as constant as possible. In
additiontotheoatswitches,thesolenoidvalvealsoassistswithautomatedmonitoringofthewatersup-
ply.Ifthewaterinthetankfallsbelowthenormallevel,theupperoatswitchswitchesandthesolenoid
valve opens the water supply to the tank. Once the normal water level is reached, the solenoid valve is
closed once more.
Operatingthehumidierwithaninadequatewaterleveldamagestheoscillators.Topreventthis,the
loweroatswitchswitchesandoperatesarelayinthecontrolcabinet,whichturnsoffthepowersupply
totheunitifthewaterfallsbelowthesafetylevel:
Inaddition,athermostatswitchesthepoweroffifthetemperatureintheultrasonichumidierrisesabove
a preset threshold. Varistors are installed to protect the electronics from voltage peaks.
Schwimmerschalter Wasserversorgung, BNB
Befindet sich der Magnetring im Schwimmer in der unteren Position bleibt
der Schalter geöffnet.
Befindet sich der Magnetring im Schwimmer in der oberen Position wird der
Schalter geschlossen und somit die Stromversorgung des Magnetventils
und damit die Wasserversorgung hergestellt.
Normal operation for BNB
Water level
ON status OFF status
Magnetic ring
Switch
The magnetic ring
opens the switch
to cut off the
power supply
OFF Status
Magnetring
Schalter
Der Magnetring hält den
Schalter in geöffneter
Position, so dass das
Magnetventil nicht
einschaltet und die
Wasserversorgung
unterbrochen bleibt.
Float
Fehlfunktion bei Vertauschen
Water supply
Keine Wasserversorgung
Normal operation for ENS

© STULZ GmbH, Hamburg DE / 06-2016 / 1000687
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STULZ UltraSonic -System for duct humidication ENS 14 A - 18 A- Product description
4.4. Operating principle of ultrasonic humidication
Ultrasonic humidiers from the STULZ UltraSonic model series work on the principle of ultrasonic atom-
ization. A 48 V alternating voltage is rectied on an nebulizer print plate and converted into a high-fre-
quency signal of 1.65 MHz. This signal is transferred to an transducer installed in the water bath, which
converts it into a high-frequency mechanical oscillation. The integrated transducers are referred to as
thickness transducers, which change their thickness 1.65 million times a second in line with the applied
signal of 1.65 MHz.
The surface of the transducer
(1) vibrates at such high speed
that the water (2) can no longer
follow the movement due to its
inertia. This produces a column
of water (3) above the trans-
ducers as soon as the unit is
switched on.
Because the water is unable to
follow the faster movement of
the transducer, a momentary
vacuum occurs during the nega-
tive amplitude of the transducer.
Cavitation gives rise to bubbles,
which are "catapulted" to the
edge of the water column during
the positive amplitude, where
they knock into one another with
great force. During this process,
extremely ne water particles (4)
are atomized at the edge of the
water column (3). Furthermore,
as the sonic waves are concen-
trated just below the surface
of the water, cross waves are
produced. In the center of these,
minuscule water droplets (4)
break down to form a mist that
is immediately assimilated in the
airow.
1
2
3
4

DE / 06-2016 / 1000687 © STULZ GmbH, Hamburg
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Product description STULZ UltraSonic -System for duct humidication ENS 14 A - 18 A-
4.5. Technical data
The STULZ UltraSonic ENS ultrasonic humidier works on the principle of ultrasonic atomization. The
airow in the duct blows the mist, which was produced in a water tank with the aid of an transducer, into
the room to humidify it. The ultrasonic humidier consists of the atomization modules, the supply module
with solenoid valve that lets in the water supply, oat switches and a housing accommodating a fan. A
switch gear cabinet must be installed externally, which will house the open and closed-loop control sys-
tems and power supply for the unit.
Model (ENS) 14 A 18 A
Capacity* (kg/h) 14 18
Number of transducers 24 30
Operating voltage (V AC) 48 48
Rated power (W) 750 960
Empty weight (kg) 11 13
Dimensions HxWxD (mm) 190x785x150 190x950x150
Dimension P (mm)** 730 895
Flushing water volume (l)*** 3,4l 3,4l
Open-loop/closed loop control
Humidity measurement with setpoint/actual value
comparison
USM / USS 1303 USM / USS 1303
ON/OFF accessory set 1) Set 4 Set 4
Proportional accessory set 1) 4) Set 17 Set 17
ON/OFF control module with
"ON/OFF" time relay 2)
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* Capacity at a water level of 40 mm, air temperature of 26°C, water temperature of 26°C and voltage of 48 V.
Operating conditions: Ambient temperature 8°C to 40°C, relative humidity less than 90%.
Water supply: Only demineralized drinking water < 80 μS/cm may be supplied to the ultrasonic humidier.
The water pressure to the ultrasonic humidier must be between 0.5 bar and 6 bar, the water temperature
between 5°C and 40°C.
** See drawing "4.6. Dimensional drawing" on page 17.
*** When connected to a STULZ USM control cabinet and using factory settings.
1) For installing in an on-site switch gear cabinet
2) Up to humidier capacity of 3 kg/h
Selecting the required open-loop/closed-loop control system
Required control Type of control Possible components
3) Humidity measurement with
actual value/setpoint comparison
Proportional control USM/USS controller
4) External control with
control signal 0-10V DC / 0-1V DC
Proportional control USM/USS controller or
proportional control accessory set1)
Please refer to our STULZ UltraSonic control manual for more information.
Visit our web site at www.stulz.com.
Here you can also download our manuals.