Armstrong EHU-750 Series User manual

Pictures for illustrating purposes only
SERIES EHU-750 HUMIDIFIER
752, 753, 754, 755
Technical manual

2 Pictures for illustrating purposes only
Safety information 3-4
Accreditation 5
RoHS declaration 6
Delivery contents 7
Dimensions & weights 8
Humidifier component part overview 9
Wall installation
Installation steps 10
Step 1 - Placing and wall attachement 11-12
Step 2 - Water connection 13
Step 3 - Steam pipe positioning 14 to 21
Step 3 - Optional temperature control system 22
Step 4 - Condensate outlet 23
Step 5 - Electrical connections 24 to 39
Step 6 - Control connection 40
Setting up 41
System management
Humidifier status menu 42-44
Humidifier configuration menu 45
Configuration changing menu 46-48
Maintenance
Cylinder maintenance guide 49
Precaution 50
Service & alerts 51 to 53
Main board changing 54
Steam cylinder cleaning 55
Valves maintenance 56-57
Spares lists 58 to 61
SERIES EHU-750 HUMIDIFIER
Table of Contents

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SERIES EHU-750 HUMIDIFIER
Safety information
IMPORTANT
Please read, heed and follow the enclosed safety information and the
warning labels inside the humidifier before installation or maintenance.
Warnings&safetysymbols
Warning : This symbol is used to designate a danger of injury or potential
damage to the system.
Caution : High voltages are present inside the humidifier. All works concerned
with the electrical installation must be carried out by skilled and qualified
personnel.
Caution : Danger of scalding ! The EHU-750 humidifier generates steam
during operation and therefore surfaces and pipe-work become very hot.
Ensure that equipment not sustaining high temperatures be kept away.
Warning : the end user should ensure that the equipment be disposed of
according to the local prevailing regulations.
Deliveryandstorage
Any loss or damage during delivery should be reported to carrier by registered letter
within 3working days and be advised to Armstrong International sa.
(« Armstrong® ») or to authorized dealer.
It is recommended that the EHU-750 humidifier be kept in its transit packaging for as
long as possible prior to maintenance. If the humidifier is to be put into storage prior to
installation, it must be stored under cover and protected from physical damage, dust,
frost, rain and humidity. More than 6 months storage is not recommended.

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SERIES EHU-750 HUMIDIFIER
Safety information
GENERAL
This manual contains all details necessary for the planning and installation of the EHU-750
humidifier. In addition commissioning and maintenance details are included.
The manual is intended for use by engineers and properly trained technical personnel.
Maintenance, servicing or repair work must only be carried out by suitable skilled and
qualified personnel, the customer must be responsible for ensuring their suitability.
Any risks or hazards, especially when working from ladders or towers should be identified by
a skilled and Health and Safety representative and effective control measure put in place.
No liability will attach to the Distributor if any damage, injury or accident is attributable to
inattentive, inappropriate, negligent or incorrect operation of the machinery whether or not
caused deliberately. Always isolate all electrical and water supplies before commencing any
maintenance.
Every effort has been made to ensure details contained in this manual are correct, however,
in view of the wide range of conditions experienced in air handling systems, the information
provided should only be used as a guide. Please contact your Agent if any doubt.
Correctuse
EHU-750 humidifiers are ONLY intended for use with air handling systems or direct air
humidification. ANY OTHER APPLICATION IS NOT CONSIDERED USE FOR THE
INTENDED PURPOSE. THE MANUFACTURER CANNOT BE MADE LIABLE FOR ANY
DAMAGE RESULTING FROM INCORRECT USE.
Water
Series EHU-750 humidifiers are designed to be used with mains, demineralized R/O or
softened water. On no account attempt to introduce any other fluid or chemical into the
system. Water supply should not exceed 6.0 bar and installation should comply with local
regulations. If the water pressure exceeds 6.0 bar, a water regulator valve must be used.
Electricity
All work concerned with electrical installation MUST only be performed by skilled and
qualified technical personnel (eg electrician or technicians with appropriate training). The
customer MUST be responsible for ensuring their suitability.
It is the duty of the installer to ensure that suitable sized cables and MCB protection is
provided. Please observe the local regulations concerning the provision of electrical
installations.
Warranty
A one year warranty term—cost and labor—is applicable to the parts of the EHU-750 to the
exception of the usual consumable parts (valves, cylinders or parts of cylinders) provided our
recommendations of use & maintenance have been adhered to. Failure to specify and fit
original parts and accessories will invalidate our warranty.
NOTE
The manufacturer’s policy is one of continuous research and development. He therefore
reserves the right to amend without notice the specifications given in this document.
The photographs are for illustrating purposes only.

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APPLIEDDIRECTIVES
Electromagnetic Compatibility Directive : 89/336/EEC, 2014/30/UE
Low Voltage Directive : 73/23/EEC, 2014/35/UE
Machinery Directive : 98/37/EC Amending Directive 89/392/EEC
Standard(s) to which Conformity is declared :
EN 61000-6-3 : Electromagnetic compatibility generic requirements (residential, commercial and light indus-
tries) EN 55022 class B conducted and radiated emission limits)
EN 61000-6-2 : Electromagnetic compatibility (EMC) – Generic standards –Immunity for industrial environ-
ments; EN 61000-4-3 : Radiated, radio frequency, electromagnetic field immunity test.
EN 61000-4-6 : Immunity to conducted disturbances induced by radio frequency fields
EN 61000-4-4 : Electrical fast transient/burnt immunity test
EN 61000-4-5 : Surge immunity test
EN 61000-4-2 : Electrostatic discharge immunity test
EN 60204-1 : Safety of machinery – Electrical Equipment of machines – Part 1 : General requirements
EN 292 Parts 1 & 2 : Safety of machinery basic principle mechanical design.
Manufacturer’s Name and Address
ARMSTRONG INTERNATIONAL SA
DEVATEC SAS
Bd des Frères Rousseau
76550 Offranville - FRANCE
Authorised Representative
Type of equipment
Series EHU-750 humidifier
Model Name (s) & Series:
EHU-750
Year of Manufacture
2001
We the undersigned, hereby declare that the equipment specified
above conforms to the above Directive(s) and Standard(s).
Mr FRAMBOT Jean-François
Managing Director
Date : 01.06.2016
SERIES EHU-750 HUMIDIFIER
Product accreditation

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SERIES EHU-750 HUMIDIFIER
RoHS declaration
Armstrong International sa
devatecsas
Bd des Frères Rousseau
76550 Offranville
France
Confirms that the series EHU-750 steam humidifier is manufactured in compliance with
the European regulations 2002/95/EU (RoHS).
This guideline regulates after July 1
st 2006 the use of mercury, cadmium, lead (soldering
processes), chrome VI as well as PBB and PBDE. EHU-750 steam humidifiers manufactured
previously to this date may contain above materials.
Name : MINFRAY Jean-Marie
Position : R&D Engineer
Date : 05.06.2008
Signature:

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Whatisinthebox:
1. One EHU-750 steam humidifier supplied with one, two or three disposable or cleanable cylin-
der(s) according to the purchased model together with an on/off or proportional control.
2. One 500mm long flexible hose with 3/4”thread (with washers) for tap water connection.
3. Ø 25 mm drain hose :
EHU-752 & 753 (1 cylinder ) : 1 m. long
EHU-754 (2 cylinders) : 2 hoses of 1 m. long and 1.2 m. long respectively
EHU-755 (3 cylinders) : 3 hoses of 1 m. long, 1.2 m. long and 1.8 m. long
4. Hose clamps :
EHU-752 & 753 : 3 clamps (2 pieces for the steam hose & 1 piece for the drain hose)
EHU-754 : 6 clamps (4 pieces for the steam hoses & 2 pieces for the drain hoses)
EHU-755 : 9 clamps (6 pieces for the steam hoses & 3 pieces for the drain hoses)
SERIES EHU-750 HUMIDIFIER
Delivery contents
1
Any loss or damage during delivery should be reported to carrier by registered letter
within 3 working days and be advised to Armstrong®or to authorized dealer.
It is recommended that the EHU-750 humidifier be kept in its transit packaging for as
long as possible prior to maintenance. If the humidifier is to be put into storage prior to
installation, it must be stored under cover and protected from physical damage, dust,
frost, rain and humidity. More than 6 months storage is not recommended.
3 2 4
OPTIONS
Remote information board
Filling cup plateform
400/230V transformer
(for installation without neutral)
Draining water cooling kit
Sanitation system
Power circuit breaker
Protective enclosures
(sizes as per models)
Humidifier ground holders
ACCESSORIES
Stainless steel holed steam distributing pipes
Steam and condensate hoses
Room ventilation units
Room or duct humidity sensor
Humidistat
ExpressPack

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SERIES EHU-750 HUMIDIFIER
Dimensions & Weight
469
A
533,4
B
214,5
C
300 275
262
414
D
G
357
357
G
E414,31
E
271,5
D
402
552
275 382
521
401,69300,61 381,78275,22275,22
G
E
G
E
DD
H
F F F
HH
Dimensions in mm Weight in Kg
Humidifier Water
inlet Steam outlet
Steam
outlet
spacing
Drain
outlet
Drain
outlet
spacing Empty Opera-
ting
Model A B C D E F G H
EHU-752: 1 SMCYL 475 540 217 215 355 355 15 23
EHU-753: 1 LG CYL 550 680 272 270 410 410 22 37
EHU-754: 2 LG CYL 845 680 272 270 400 300 400 300 30 60
EHU-755: 3 LG CYL 1075 680 272 270 380 275 380 275 45 90
EHU-752
1 small
cyl.
EHU-754
2 cylinders EHU-755
3 cylinders
EHU-753
1 large
cyl.
 SM CYL = small cylinder, LG CYL = large cylinder

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SERIES EHU-750 HUMIDIFIER
Humidifier component parts
EHU-752&753humidifiersplitview
20
15
5
6
17
21
18
19
16
8
14
11
13
10
12
9
24
22
23
7
2
3
3
1
1 Steam hose
2 Water feed hose 12x16mm
3 Hose clamp 16x25mm
4 Overflow water hose 18x22m
5 On/off rocker switch
6 Stand-by lamp
7 Grommet
8 Drain cup (upper)
9 Water inlet valve
10 LCD display board
11 Remote information board (option)
12 Power contactor
13 Main circuit board
14 Filling cup
15 Drain valve
16 Cylinder strainer
17 Steam cylinder
18 Stainless steel electrode plate
19 High water level electrode
20 High water level electrode cable
21 Electrode live power cable
22 Cylinder water feed hose 18x22 mm
23 Flexible water feed hose 3/4”F
24 Hose clamp 12x22 mm
4

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SERIES EHU-750 HUMIDIFIER
Installation steps
All works concerned with electrical installation must be carried out by a skilled and
qualified personnel.
Please read, heed and follow the enclosed information for the installation of the
humidifier and the steam, water and electrical networks.
For further technical assistance, feel free to call Armstrong®.
Failure to adhere to manufacturer’s installation recommendations will invalidate
your warranty.
Steps
Setp 1 - Placing and wall attachment
Step 2 - Water connection
Step 3 - Steam pipe positioning
Step 4 - Condensate outlet
Step 5 - Electrical connection
Step 6 - Control connection
Step 2
Step 3
Step 4
Steps 5- 6
Step 1
Step 4