Stulz ENS Series User manual

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

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STULZ GmbH
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
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
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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

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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.