fisair HEF2 SERIES Manual

FISAIR S.L.U. C/ Uranio, 20, 28330 Madrid, Spain.
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HEF2 SERIES
INSTALLATION AND MAINTENANCE MANUAL
OF EVAPORATIVE HUMIDIFIERS FOR
AIR HANDLING UNITS (A.H.U.) OR DUCTS
MHEF2-EN-19-1
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...................................................................................................5
2. ASSEMBLY OF ACCESORIES DELIVERED AS PARTS. (Recirculated Water)...................6
3. ASSEMBLY OF ACCESORIES DELIVERED AS PARTS. (Direct Water).............................8
4. MECHANICAL DESIGN, OPERATING PRINCIPLES AND COMPONENTS. (Recirculated
water, standard on/off).....................................................................................................................9
5. MECHANICAL DESIGN, OPERATING PRINCIPLES AND COMPONENTS. (Direct water,
standard on/off).............................................................................................................................11
6. MECHANICAL DESIGN, OPERATING PRINCIPLES AND COMPONENTS. (Recirculated
water with stage control)................................................................................................................14
7. MECHANICAL DESIGN, OPERATING PRINCIPLES AND COMPONENTS. (Direct water,
stage control) ................................................................................................................................17
8. INSTALLATION REQUIREMENTS.....................................................................................20
9. CONNECTIONS, SETTINGS AND REGULATION FOR HEF2 SERIES (RECIRCULATED
WATER)........................................................................................................................................22
9.1 External dimensions tolerances, Fill/drain connection and leg measurements....................22
9.1.1 External dimensions tolerances and cassettes GAP......................................................22
9.1.2 With float valve for filling 3/8".........................................................................................23
9.1.3 With float valve for filling 1/2".........................................................................................25
9.1.4 Water basin leg measurements.....................................................................................27
9.2 Scheme of the connections (Standard)..................................................................................28
9.2 A. Connection to the water supply for filling the water tank. .........................................29
9.2 B. Connecting the drain to the water trap.....................................................................30
9.2 C. Electricity connection of the Fisair recirculation pump. ............................................31
9.2 D. Level detector electricity connection........................................................................33
9.2 E. Setting valves regulating evaporative cassette irrigation flow. ...............................35
9.2 F. Adjusting the constant bleed-off regulation valve.....................................................36
10. CONNECTIONS AND SETTINGS/REGULATIONS FOR HEF2-DW (DIRECT WATER)….38
10.1 General external and connection dimensions. (Standard).....................................................38
10.1.1 External measurements tolerances & GAP between cassettes....................................38
10.1.2 Dimensional drawing for water supply & drain connections. ........................................38
10.1.3 Water basin leg measurements...................................................................................40
10. 2 Schematic connections........................................................................................................41
10.2 A. Connection to the water supply. ..............................................................................42
10.2 B. Connecting the drain to the water trap.....................................................................43
10.2 E. Setting of the irrigation valves in each evaporative cassette....................................43
11. CONNECTIONS AND SETTINGS/REGULATIONS FOR OPTIONAL ACCESORIES........47

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11.1 Optional accessories schematic connections for recirculated water HEF2 series................47
11.2 Optional accessories schematic connections for direct water HEF2-DW series..................48
11.3 A. Connection of the 24V or 230V water basin filling N.C. solenoid valve ...........................49
11.4 B. Connection of the N.C. motor-zone valve for automatic draining of the HEF2 series......50
11.5 C. Flexible connector for the water supply. .........................................................................57
11.6 D. External rigid connector in PP-R (BSPT-M ½ “) for the water supply..............................57
11.7 E. External rigid connector in PP-R (BSPT-M) for draining. ................................................57
11.8 F. U.V. lamp disinfection system. (*)..................................................................................58
11.8 F1. External fill/water supply UV lamp disinfection system. (For direct water)..............58
11.8 F2. UV lamp disinfection by immersion at the water basin. (For recirculated water).....59
11.9 G. Perimeter closures cover plates & dimensional drawings...............................................61
11.10 H. Solenoid valve(s) connection for stage control. ..............................................................64
11.11 J. HEF2 Series for duct.......................................................................................................65
11.12 N Connecting the 3-way motor valve to manage the water feed and emptying....................69
11.13 O. Motor-zone valve for emptying of the manifold header/irrigation at HEF2-DW................73
11.14 I and P Control panel (P stages) with conductivity control...................................................73
12. WATER QUALITY, AIR QUALITY AND MAINTENANCE CONDITIONS ............................74
13. MINIMUM COMPLIANCE REQUIREMENTS VDI6022......................................................76
13.1 Recirculated water equipment:............................................................................................76
13.2 Direct water equipment:......................................................................................................77
14. START-UP RECOMMENDATIONS....................................................................................77
15. MAINTENANCE..................................................................................................................79
16. CLEANING AND DISINFECTION.......................................................................................80
16.1 Evaporative humidification: a natural method that does not carry bacteria..........................80
16.2 Cleaning .............................................................................................................................80
16.2 A. General...................................................................................................................80
16.2 B. Scale formation process..........................................................................................80
16.2 C. Cassette cleaning protocol......................................................................................81
16.3 Disinfection.........................................................................................................................84
17. HYGIENE CERTIFICATE...................................................................................................85
18. LATERAL DISASSEMBLY..................................................................................................87
19. FRONT DISASSEMBLY.....................................................................................................93
20. CLEANING THE INDIVIDUAL IRRIGATION SYSTEM. ......................................................95
21. LIST OF SPARE PARTS....................................................................................................97

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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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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

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3. ASSEMBLY OF ACCESORIES DELIVERED AS PARTS. (Direct Water)
ASSEMBLY Water supply 3-way valve set + rigid
external connection (if applicable).
Couple ½” BSP link in PP-R
ASSEMBLY Drain set:
¾” BSP-H, PP-R link into the drain
outlet towards the selected hand of the
water drain.

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4. MECHANICAL DESIGN, OPERATING PRINCIPLES AND COMPONENTS.
(Recirculated water, standard on/off)
MECHANICAL DESIGN
The humidifier comprises the following elements:
A stainless steel self-supporting chassis-water tank structure that houses the unit.
A set of evaporative cassettes of variable sizes and thicknesses, depending on the model and stainless
steel surround.
A stainless steel float valve automatic control mechanism for the water supply, to maintain the appropriate
level in the water tank, so the unit works correctly. This valve can be regulated in order to set it to the
available water pressure in the network.
A stainless steel water tank to hold the water, which is designed so it can be completely emptied by gravity.
A pump for supplying water from the water tank to evaporative panels (technical data on page 24).
A stainless steel mechanism integrated into the water tank acting as an overflow for the system in the
event of water level control faults.
A distribution collector + regulation valves with flow meter set to supply the appropriate irrigation
individually to the evaporative panels.
A diversion from the water flow to the distribution collector regulates a constant flow of water, which is
eliminated from the system in order to maintain a uniform amount of mineral salts
in the irrigation water, which we will refer to as the “Constant bleed-off system”.
(See page 27).
DROPLET SEPARATOR
Operating conditions giving rise to droplet carry-over, can be handled by adding a
second PP profile panel to the humidifiers to capture the droplets being detached
from the evaporative panel.
* Optionally the ball valve may be replaced by a drain motor valve.
**The equipment managed by our control panels (CCB or CCBE) will assemble the water supply solenoid valve (9) and
water drain motor valve (8).
***The equipment managed by our control panel (CCB+C or CCBE+C) including the conductivity control will not have
the continuous bleed-off system, as the concentration will be reduced by opening the drainage motor valve managed
by the conductivity control.
Process air
(***)
(*)
(**)
(**)

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(*) Optionally the ball valve may be replaced by a drain motor valve
(**) The equipment managed by our control panels (CCB or CCBE) will assemble the water supply solenoid valve (9) and water drain
motor valve (8).
(***) The equipment managed by our control panel (CCB+C or CCBE+C) including the conductivity control will not have the continuous
bleed-off system, as the concentration will be reduced by opening the drainage motor valve managed by the conductivity control.
(***)
(*)(**)
(**)