fisair HEF2 SERIES Manual

FISAIR S.L.U. C/ Uranio, 20, 28330 Madrid, Spain.
Tel: [phone] Fax: [phone] | [e-mail]| fisair.com
HEF2 SERIES
INSTALLATION AND MAINTENANCE MANUAL
OF EVAPORATIVE HUMIDIFIERS FOR
AIR HANDLING UNITS (A.H.U.) OR DUCTS
MHEF2-EN-20-0
In compliance with European Union Standards for machinery safety,
It’s essential to read this manual in detail before installing units.

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INDEX
1. GENERAL DESCRIPTION...................................................................................................6
1.1. Safety Instructions................................................................................................................7
2. ASSEMBLY OF ACCESORIES DELIVERED AS PARTS. (Recirculated Water)...................9
3. ASSEMBLY OF ACCESORIES DELIVERED AS PARTS. (Direct Water)...........................11
4. RATING PLATE AND MACHINE TYPE..............................................................................12
5. PRODUCT CODE...............................................................................................................14
6. MECHANICAL DESIGN, OPERATING PRINCIPLES AND COMPONENTS. (Recirculated
water, standard on/off)...................................................................................................................15
7. MECHANICAL DESIGN, OPERATING PRINCIPLES AND COMPONENTS. (Direct water,
standard on/off).............................................................................................................................18
8. MECHANICAL DESIGN, OPERATING PRINCIPLES AND COMPONENTS. (Recirculated
water with stage control)................................................................................................................23
9. MECHANICAL DESIGN, OPERATING PRINCIPLES AND COMPONENTS. (Direct water,
stage control) ................................................................................................................................27
10. INSTALLATION REQUIREMENTS.....................................................................................32
11. CONNECTIONS, SETTINGS AND REGULATION FOR HEF2 SERIES (RECIRCULATED
WATER)........................................................................................................................................35
11.1. External dimensions tolerances, Fill/drain connection and leg measurements....................35
11.1.1 External dimensions tolerances and cassettes GAP....................................................35
11.1.2 With float valve for filling 3/8".......................................................................................36
11.1.3 With float valve for filling 1/2".......................................................................................38
11.1.4 Water basin leg measurements...................................................................................40
11.2. Scheme of the connections (Standard)...............................................................................41
11.2 A. Connection to the water supply for filling the water tank. .........................................42
11.2 B. Connecting the drain to the water trap.....................................................................44
11.2 C. Electricity connection of the Fisair recirculation pump. ............................................45
11.2 D. Level detector electricity connection........................................................................47
11.2 E. Setting valves regulating evaporative cassette irrigation flow. ...............................49
11.2 F. Adjusting the constant bleed-off regulation valve.....................................................50
12. CONNECTIONS AND SETTINGS/REGULATIONS FOR HEF2-DW (DIRECT WATER
SERIES)........................................................................................................................................52
12.1. General external and connection dimensions. (Standard)...................................................52
12.1.1 External measurements tolerances & GAP between cassettes................................52
12.1.2 Dimensional drawing for water supply & drain connections.....................................53
12.1.3 Water basin leg measurements................................................................................54

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12.2. Schematic connections.......................................................................................................55
12.2 A. Connection to the water supply. ..............................................................................56
12.2 B. Connecting the drain to the water trap.....................................................................57
12.2 E. Setting of the irrigation valves in each evaporative cassette....................................57
13. CONNECTIONS AND SETTINGS/REGULATIONS MADE FOR OPTIONAL ACCESORIES.
13.1. Optional accessories schematic connections for recirculated water HEF2 series................61
13.2. Optional accessories schematic connections for direct water HEF2-DW series..................62
13.3 A. Connection of the 24V or 230V water basin filling N.C. solenoid valve (supplied loose for
installation by others) (*)................................................................................................................63
13.4 B. Connection of the N.C. motor-zone valve for automatic draining of the HEF2 series.
(Recirculated water)......................................................................................................................64
13.5 C. Flexible connector for the water supply. .........................................................................71
13.6 D. External rigid connector in PP-R (BSPT-M ½ “) for the water supply..............................72
13.7 E. External rigid connector in PP-R (BSPT-M) for draining. ................................................72
13.8 F. U.V. lamp disinfection system........................................................................................73
13.8 F1. External fill/water supply UV lamp disinfection system. (For direct water)..............73
13.8 F2. UV lamp disinfection by immersion at the water basin. (For recirculated water).....74
13.9 G. Perimeter closures cover plates & dimensional drawings...............................................76
13.10 H. Solenoid valve(s) connection for stage control. ..............................................................79
13.11 J. HEF2 Series for duct.......................................................................................................80
13.12 Connecting the 3-way motor valve to manage the water feed and emptying ......................84
13.14 I and P Control panel (P stages) with conductivity control...................................................88
13.15 Q Anchor Eyebolts...............................................................................................................89
13.16 R HEF2E-DW without collector............................................................................................90
14. WATER QUALITY, AIR QUALITY AND MAINTENANCE CONDITIONS ............................91
15. MINIMUM COMPLIANCE REQUIREMENTS VDI6022......................................................94
15.1. Recirculated water equipment:............................................................................................94
15.2. Direct water equipment:......................................................................................................94
16. HEF2E CONTROL INSTALLED IN THE AHU.....................................................................95
16.1. Basic on/off control.............................................................................................................96
16.2. Stages control.....................................................................................................................99
16.3. Dew point control..............................................................................................................104
17. START-UP RECOMMENDATIONS..................................................................................107
18. MAINTENANCE................................................................................................................109

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19. CLEANING AND DISINFECTION.....................................................................................110
19.1. Evaporative humidification: a natural method that does not carry bacteria........................110
19.2. Cleaning ...........................................................................................................................110
19.2 A. General .................................................................................................................110
19.2 B. Scale formation process........................................................................................111
19.2 C. Cassette cleaning protocol....................................................................................111
19.3 Desinfection......................................................................................................................115
20. HYGIENE CERTIFICATE.................................................................................................116
21. LATERAL DISASSEMBLY................................................................................................118
22. FRONT DISASSEMBLY...................................................................................................124
23. CLEANING THE INDIVIDUAL IRRIGATION SYSTEM. ....................................................126
24. LIST OF SPARE PARTS..................................................................................................128
25. MACHINE DECLARATION CONFORMITY......................................................................133
26. PARTLY COMPLETED MACHINERY CONFORMITY DECLARATION............................134
27. WARRANTY.....................................................................................................................135

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1. GENERAL DESCRIPTION
EVAPORATIVE HUMIDIFIER OPERATING PRINCIPLES
FISAIR evaporative humidifiers are units designed to increase the water vapour content of the treated air, by
making use of the natural evaporation of water from its liquid phase. The air supply being treated is passed
through a cellular panel dampened using an irrigation system. This panel is composed of undulating sheets
of inorganic paper with stiffening and water absorbent additives.
The layout, as channels criss-crossing the panel provides a huge surface for water-air contact, which
maximises water evaporation, and reduces to a minimum resistance to the movement of the air (pressure
drop).
FISAIR evaporative humidifiers work in a similar way to natural processes in rivers, lakes and seas. The
vapour added to the air is exclusively pure water vapour.
PROVISIONAL STORAGE
During storage, units must be kept dry and protected from the elements.
Warning: Avoid direct sunlight and sites in which temperatures can exceed 50ºC.
Remark: Thermo-hygrometric conditions during storage:
Temperature: [-10… 50ºC]
Relative Humidity: [5…95%HR]
without condensation
HEF2 Series with recirculation

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1.1. Safety Instructions
FISAIR disclaims any liability if not all the installation and operating instructions it has
provided are complied with; if the products have been modified or altered without the written
consent of FISAIR; or if the products have been subjected to improper use, mishandling,
alteration, improper maintenance or show signs of negligent use or being involved in an
accident. These situations could include an incorrect power connection, impacts with other
objects, removal or disarming of security fittings/measures, etc.
Please readthese safety notes carefully andexamine the equipment to become familiar with it before
installing, commissioning or servicing.
The following symbols or messages may appear in this document or on the equipment. They warn
of potential hazards or provide information that may help you clarify or simplify a procedure.
Attention, Live Current
The presence of this symbol on a hazard or warning label indicates that
there is a risk of electrocution, which can lead to personal injury or life-
threatening conditions if the instructions are not followed.
Atención
The presence of this symbol on a hazard or warning label indicates that
there is a risk of electrocution, which can lead to personal injury or life-
threatening conditions if the instructions are not followed.
Installation of a residual current device in the power supply line.
The installer has to install a specific residual current device in the machine's electrical
power circuit.

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General points
•If you notice that something is not working properly, switch off the unit immediately and take
steps to ensure that it does not switch on again. All faults must be corrected immediately.
•Use duly qualified personnel to carry out repair work. This will ensure that the unit operates
safely.
•Use only original FISAIR replacement parts.
•Refer to local regulations that restrict or regulate the use of this humidifier.
How the unit works
•Do not jeopardise the safety of the unit.
•Periodically check the device's protection and alert devices.
•The unit's safety fittings must not be removed or disabled.
Installing, Disassembling, Maintaining and Repairing the unit
•The machine must not be manipulated when it is operating.
•Switch off the unit's power supply when conducting maintenance work or making repairs to
the unit.
•Never add components to the unit without prior written approval from FISAIR.
About the electrical components
•Any work that affects the electrical components must be carried out by qualified electricians.
•Use only original, correctly calibrated fuses.
•Carry out periodic checks of the electrical unit.
•All defects, such as loose connections or burnt cables, must be repaired immediately.
The HEF2E control panel load break switch, whether
it is external or a FISAIR CCB2.0 or CCE2.0 panel,
must be set to position “0” (lock) before performing any
maintenance on the unit.

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2. ASSEMBLY OF ACCESORIES DELIVERED AS PARTS. (Recirculated Water)
Remark:These accessories can only be attached once the equipment is located inside the air handling
unit.
ASSEMBLY SET (overflow + draining + draining valve)
Standard: A ball valve is used for draining.
Optional: A motorized zone valve is used for draining.
Female threaded
connection BSP 1” PP-R
to connect / tighten
Female threaded
connection BSP ¾” PP-
R to connect / tighten
Female threaded
connection BSP 1” PP-R
to connect / tighten
Female threaded
connection BSP ¾” PP-R
to connect / tighten

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ASSEMBLY SET OF THE CONSTANT BLEED-OFF (*)
(*) Not necessary with conductivity control
Brass fitting ½ " to
couple the regulating
valve + bleed-off
flow meter
Removable threaded
connection PP-R ½ "
to connect / tighten