fisair HEF7 Series Manual

Installation and maintenance manual
HEF7
Adiabatic Cooling System for
Air-condensed Water Chillers
In compliance with European Union standards for machinery safety,
it is essential to read this manual in detail before installing units.

HEF7
Installation and maintenance manual

3
Fisair Air humidity control
04 General description
05 HEF7 nomenclature
06 High efficiency HEF7 evaporative panel
06 ORGANIC evaporative panel
07 INORGANIC evaporative panel
08 Unit components
10 Operating principles
11 Installation requirements
12 Connections and regulation
13 Recirculation pump electricity connection
14 Level detector electricity connection
15 Solenoid valve electricity connection
16 Draining motor-valve electricity connection
17 Setting the valve regulating irrigation flow
18 Setting the valve regulating the bleed-off flow
19 Maintenance and cleaning
21 CE declaration of conformity
22 FISAIR S.L. guarantee policy
Contents

4
HEF7 Installation and maintenance manual
General description
EVAPORATIVE HUMIDIFIER
OPERATING PRINCIPLE
FISAIR evaporative humidifier units are designed to
increase the water vapour content of the treated air,
through the natural evaporation of water in its liquid phase.
The air flow being treated passes through a cellular panel,
which is watered by an irrigation system. The panel is
made up of undulating sheets of organic or inorganic
paper containing stiffening agents and water absorbers.
Panels are laid out in criss-crossing channels to provide a
large surface area for air-water contact, which maximizes
water evaporation and at the same time minimizes
resistance to the air flow passing through (pressure drop).
See the graph of evaporative performance and pressure
drop for the panel in relation to the air speed (pages 6
and 7).
FISAIR evaporative humidifiers work in a similar way to
natural phenomena occurring in rivers, lakes and seas.
All that is added to the air is pure water vapour.
PROVISIONAL STORAGE
During storage, keep units dry and protected against the
elements.
hot and dry air
cold and wet air

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Fisair Air humidity control
HEF7 nomenclature
HUMIDIFIER
EVAPORATIVE
FISAIR
SERIES
Nº OF COVERED FANS
01
02
03
04
FAN Ø
CASSETTE THICKNESS (MM)
PANEL MATERIAL
0
I
(Organic)
(Inorganic)
Line voltage
Line voltage
QUANTITY
HEF7 NOMENCLATURE
PUMPING SYSTEM FOR HEF7
C.P.M. (Control panel and protection) / (CONTROL PANEL)
H E F - 7 - 00 - 000 - 000 - N
GB7- 230V-IN-50/60Hz
CPM- 230V-IN-50/60Hz

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HEF7 Installation and maintenance manual
TYPE 0760
ORGANIC EVAPORATIVE PANEL
• Maximum freshness: it works as a natural filter purifying
the entry air. Carefully designed channelling eliminates
dust particles and mineral deposits from the air, which are
trapped on the evaporative surface.
• Maximum durability: made from special cellulose paper
impregnated with insoluble chemical components in order
to ensure a long working life in the system.
• Maximum resistance: appropriate bleed-off and regular
brushing make it possible to be used in imperfect water
and air conditions.
High efficiency HEF7 evaporative panel
100
95
90
85
80
75
70
65
60
55
50
0.0 1.0 2.0 3.0 4.0 5.0
300
200
150
% Saturation Efficiency
Front air speed (m/s)
0.0 1.0 2.0 3.0 4.0 5.0
200
150
300
250
Pressure drop (Pa)
Front air speed (m/s)
225
200
175
150
125
100
75
50
25
0
[Note]
Air speeds in the shaded zone can cause droplet carry-over.
• Maximum performance: Organic Media is designed to
provide the largest possible air-to-water contact surface
area (approximately 460 m2/m3). Such a large area
enables optimal evaporative cooling and humidification
from the evaporation.

7
Fisair Air humidity control
TYPE 0760
INORGANIC EVAPORATIVE PANEL
These panels are made of fibreglass with a special coating
to enable a greater absorption capacity and ensure constant
evaporative humidification and cooling, even at high air
speeds. They are made of fireproof inorganic material.
They are ideal for humidifiers placed after air treatment and
heater units, and for the pre-cooling of gas turbines.
• Inorganic and fireproof
(in accordance with EURO Class A2, S1, D0)
• Low humidification/cooling energy costs
• Precise control
• No risk of oversaturation
• No need for water treatment
• Safe and hygienic
100
95
90
85
80
75
70
65
60
55
50
0.0 1.0 2.0 3.0 4.0 5.0
300 mm
200 mm
100 mm
% Saturation Efficiency
Front air speed (m/s)
0.0 1.0 2.0 3.0 4.0 5.0
100
Pressure drop (Pa)
Front air speed (m/s)
95
90
85
80
75
70
65
60
55
50
[Note]
Air speeds in the shaded zone can cause droplet carry-over.
300 mm
100 mm
200 mm

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HEF7 Installation and maintenance manual
Unit components
1
3
35
6
2
4

9
Fisair Air humidity control
L
E
H
The unit serial number and the dimensions of the cassette are required for evaporate cassette spare parts.
L= Cassette length H= Cassette height E= Cassette thickness
For further information on parts of systems, please contact the manufacturer.
Brand Code Description Units
1 62000080 REGULATION VALVE 1
2 62000075 REGULATION VALVE 1
3 71090006 SOLENOID VALVE 1
4 64220314 LEVEL SENSOR 1
5 63390013 VALVE ACTUATOR 1
6 63330015 2-WAY VALVE 1
7 65330005 PUMP 1

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HEF7 Installation and maintenance manual
Overflow
Drainage
Water supply
Bleed-off
IRRIGATION PANEL
Water tank
A
3
D
B
2
C
5
4
7
1
AWater Supply
BConstant Bleed-off
COverflow
DDrainage
1Regulation Valves with Flow Meter (Irrigation)
2Regulation Valves with Flow Meter (Bleed-off)
3Filling Solenoid Valves
4Max/Min Level Detector
6Valves with Actuator (Drainage)
7Water Recirculation Pump
Operating principles

11
Fisair Air humidity control
Installation requirements
OVERVIEW
To ensure optimum performance and maintenance,
humidifiers must be placed on a level surface, with a drain,
so possible leaks during installation, start-up, operation and
maintenance can be controlled.
Assembly in conjunction with an air cooling unit must
ensure the air passes through the evaporative panels,
by closing off the perimeter sides to prevent a potential
bypass in the air flow, and ensure the adiabatic
performance of the design.
PLACEMENT AND SERVICING SPACE
Humidifiers are normally placed just before the coil and
before the sensible exchange in the air cooling system.
A 1m space should be left in front of the unit section for
inspection and servicing.
EXPELLED AIR Axial fanIrrigation system
Condensation
coil
High performance and
low pressure drop
evaporative panel
EXTERIOR AIR PRE-COOLED
AIR
Stainless steel frame
and surround
Drainage system
400 mm

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HEF7 Installation and maintenance manual
Connections and regulation
OVERVIEW
FISAIR HEF7 evaporative humidifiers essentially work in
accordance with the irrigation of the evaporative panels.
Humidification occurs whenever there is an air current
passing through and the water pump irrigates the panels.
[Note]
In order to eliminate superficial dust on the panels, and
to prevent its transmission to occupied areas, the water
irrigation pump should be left operating for 6 hours with no
air flow, to wash the panels. Subsequently, the water used
for washing should be drained before normal start-up.
2H
2H>H
H
Water trap for positive pressures
Hmin. (mm)= P(Pa)/10
P= Total pressure
WATER CONNECTIONS
• Connect the water network supply to the ½” filter in Y, and
this to the solenoid supply valve.
• Connect the common outlet for the 50mm diameter drain /
overflow / constant bleed-off to the drainage network.
• The water outlet connection to the drain must have a
water trap or seal, as shown in the figure, large enough to
overcome system pressure in order for the tank to drain
completely, for hygiene reasons. The system has the
normal slope of any drainage line.

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Fisair Air humidity control
Recirculation pump
electricity connection
Connect the electricity supply cable to the
terminal box of the water irrigation pump
using an appropriate connection (IP-55 or
higher).
The protection and operations of the pump
electricity supply must be decided upon by
the system project designer.
H/m
10
8
6
4
2
0
0 2 4 6 8 10 12 14 Q/m5/h
TM 32/8

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HEF7 Installation and maintenance manual
The minimum level must be connected to protect the operation of the water recirculation pump.
The maximum level must be connected to cut off the water supply by means of the filling solenoid valve.
The diagrams below show how to make these connections:
(Vmax = 110Vac)
Pump
Filling solenoid
valve
min.
level
max.
level
S2
S1
max.
level
min.
level
Level detector electricity connection

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Fisair Air humidity control
G ½” brass water supply
N.C. solenoid valve
24V connector (L1+N+T)
230V connector (L1+N+T)
230V or 24V coil
(50/60 Hz)
44
101,5
72
L1/N L1/N
40
½” G
The water supply NC solenoid valve of the tank is composed of the body of the valve, the coil and the connector.
The coil and the connector are supplied for a 24Vac or 230Vac connection.
Solenoid valve electricity connection

Datos técnicos
AC 24 V
DC 24…48 V supply
(SELV/PELV)
Operating voltage AC / Frequency AC 24 V ± 20 % / 50/60 Hz
Operating voltage (DC) DC 24…48 V ±20 %
Power consumption AC: 5 VA / 3.5 W // DC: 3.5 W
AC 230 V supply
Operating voltage / Frequency AC 230 V ± 10 % / 50/ 60 Hz
Power consumption 7 VA / 4.5 W
Function data
Nominal torque 7 Nm
Runtime for rotary angle 90° (motor operation) 90 s
Closing time with return spring (on power failure) 15 s
Auxiliary switch
AC power supply
Switching voltage AC 24...230 V
Nominal current res./ind. 6 A / 2 A
DC power supply
Switching voltage DC 12..30 V
Nominal current DC 2 A
Switching range for auxiliary switches / Setting increments 5°...90° / 5°
Connection cables
Cross-section 0,75 mm2
Standard length 0,9 m
Degree of protection
of housing Degree of protection as per EN 60 529 IP 54
Protection class
Insulation class EN 60 730
AC/DC 24 V, feedback potentiometer lll
AC 230 V, auxiliary switch ll
Environmental
conditions
Operation / Transport IEC 721-3-3 / IEC 721-3-2
Temperature −32...+55 °C / −32...+70 °C
Humidity (non-condensing) < 95% r. h. / < 95% r. h.
Weight 1.2 kg.
Fisair Air humidity control 16
MOTOR-ZONE VALVE

Electric Diagram connections
Dimensions
GMA12..1 / GMA32..1
2 points control
AC 24 V
2 points control
AC 230 V
HEF7 Installation and maintenance manual 17

Manual positioning
Cable labeling
Pin
Cable
Meaning
Code No. Color Abbrev.
Actuators
AC 24 V
DC 24…48 V
G 1 red RD System potential AC 24 V/DC 24…48 V
G0 2 black BK System neutral
Actuators
AC 230 V
L 3 brown BN Phase AC 230 V
N 4 blue BU Neutral conductor
Auxiliary switch
Q11 S1 grey/red GY RD Switch A input
Q12 S2 grey/blue GY BU Switch A normally-closed contact
Q14 S3 grey/pink GY PK Switch A normally-open contact
Q21 S4 black/red BK RD Switch B input
Q22 S5 black/blue BK BU Switch B normally-closed contact
Q24 S6 black/pink BK PK Switch B normally-open contact
Adjusting: A, B Auxiliary contacts
Factory setting
A= 5º
B= 85º
Position Block Unblock
Fisair Air humidity control 18

Set the valve for the irrigation of the panels to ensure uniform
watering of the surface area of the panels. A value of around 1
litre/second for each square metre of irrigation surface is enough
to exceed the water required for evaporation. Generally, it is just
necessary to ensure there is excess water from panel irrigation
falling into the water tank.
The excess irrigation water ensures the surfaces of the panels
are constantly being washed.
The following equation for calculating the total irrigation flow
of each HEF-7 can be employed to set the regulation valve
precisely.
Example:
I = 0,2 * 60 * ( 0,6 + 0,6 + 0,6 + 0,45 + 0,6 + 0,6 + 0,6 + 0,42 + 0,32 + 0,32 + 0,45) = 66,72 L/min
To set the valve to the calculated irrigation flow, a 6mm Allen key is used. Flow at any time can be observed in
the flow indicator. For the valve to reach its limit, the screw must be turned several times, which enables precise
settings. To fix the set flow, use an 8mm Allen key, which ensures a constant irrigation flow.
I= total unit irrigation
e= thickness of the evaporative cassettes in metres
a= width of the evaporative cassettes in metres
i= evaporative cassettes
n= total number of evaporative cassettes
I = e *60 * ∑ai
n
i=0
Setting the valve regulating irrigation flow
Fisair Air humidity control 19

Water evaporation is caused by a higher water vapour pressure in the evaporative panel than in the air moving across it.
Because only the water evaporates, dissolved mineral salts remain in solution, and gradually increase in concentration,
despite new water being added to compensate for the evaporation.
To prevent the formation of mineral deposits on the surfaces of the evaporative panel (this would lead to a progressive
decrease in air pressure and in operating performance) it is essential to discharge some of the recirculated water to the
drainage network in tandem with the evaporation.
Analytical parameters of the drinking water network.
Water hardness: (CaCO3): 50-170 ppm
Chlorine: (Cl): <55 ppm
pH: 6-8
Silica: (SiO): <30 ppm
Iron (Fe): <0.2 ppm
Oils and grease: <2 ppm
Total dissolved solids: <550ppm
Total alkalinity: (CaCo3): 50-170 ppm
Suspended solids: <5 ppm
Bleed-off based on the cycle of concentration COC.
Bleed-off=Evaporation/(COC-1)
Cycle of concentration COC based
on conductivity (100-1000 μS/cm)
Observation: Always using the parameters
of the drinking water network.
100 μS/cm = 9 COC
550 μS/cm = 6 COC
1000 μS/cm = 2 COC
Calculation example:
Based on parameters of the drinking water network
Water evaporation=3.23 l/min
Water conductivity=550 μS/cm
COC=6
Bleed-off= 3.23/(6-1)= 0.65 l/min
The flow of the bleed-off valve can be set approximately
to begin with as 10% of total irrigation flow. By regularly
observing the state of the panels (on the air input side);
after 1 to 2 weeks working, if there are no signs of mineral
deposits whitening the surface, the bleed-off flow can
be reduced or left the same, or, if on the other hand, lime
deposits are noticeable, it can be increased.
Set the flow of the bleed-off valve by removing the
handwheel from its parked position and placing it on the flow
meter. It can then be swivelled to set the required flow. Once
the flow has been set, place the handwheel in its parked
position once again.
Setting the valve regulating the bleed-off flow
Parked handwheel
Position for setting flow
HEF7 Installation and maintenance manual 20