Carrier RW Manual

Translation of the original document
EVAPORATIVE HUMIDIFIER
INSTALLATION, OPERATION AND
MAINTENANCE INSTRUCTIONS

3
The illustrations in this document are for illustrative purposes only and not part of any offer for sale or contract. The manufacturer
reserves the right to change the design at any time without notice.
1 - TECHNICAL RECOMMENDATIONS/WARRANTY.......................................................................................................................4
2 - OPERATING PRINCIPLE .............................................................................................................................................................4
3 - DESCRIPTION...............................................................................................................................................................................5
3.1 - General description of the humidier.........................................................................................................................................5
3.2 - General recommendations........................................................................................................................................................6
4 - TECHNICAL CHARACTERISTICS ...............................................................................................................................................7
4.1 - General characteristics of the humidier...................................................................................................................................7
4.2 - Characteristics of the components............................................................................................................................................8
5 - INSTALLATION/START-UP/MAINTENANCE .............................................................................................................................17
5.1 - Installation ...............................................................................................................................................................................17
5.2 - Start-up....................................................................................................................................................................................17
5.3 - Maintenance............................................................................................................................................................................17
5.4 - Disposal of the product and efuent generated ......................................................................................................................17
5.5 - Cleaning and disinfection ........................................................................................................................................................17
5.6 - Removing the media ...............................................................................................................................................................18
6 - RELATED DOCUMENTS ............................................................................................................................................................ 22
6.1 - CCB control box wiring diagram (option 12)............................................................................................................................22
7 - MCCB MANUAL - HUMIDIFIER CONTROL BOX ......................................................................................................................23
7.1 - General description.................................................................................................................................................................23
7.2 - Installation ...............................................................................................................................................................................24
7.3 - Description of hardware ..........................................................................................................................................................25
7.4 - Connections ............................................................................................................................................................................31
7.5 - Monitoring................................................................................................................................................................................33
7.6 - Conguration...........................................................................................................................................................................34
7.7 - Settings ..................................................................................................................................................................................36
7.8 - Calibration ...............................................................................................................................................................................37
7.9 - Launch.....................................................................................................................................................................................37
7.10 - List of alarms.........................................................................................................................................................................38
8 - AL-UW SUBMERSIBLE UVC LAMP...........................................................................................................................................39
8.1 - Safety ......................................................................................................................................................................................39
8.2 - Operating data and description of the device..........................................................................................................................40
8.3 - Assembly and connection of the unit.......................................................................................................................................41
8.4 - Unit operation..........................................................................................................................................................................42
8.5 - Faults and troubleshooting......................................................................................................................................................42
8.6 - Maintenance and spare parts..................................................................................................................................................43
8.7 - Disposal...................................................................................................................................................................................43
CONTENTS

4
1 - TECHNICAL RECOMMENDATIONS/WARRANTY
For all technical recommendations relating to the humidier, please see paragraphs 1-GENERAL, 2-SAFETY GUIDELINES,
3-REGULATIONS of Instruction Manual FR 7486825 for the Unit, supplied with the product.
Regarding the warranty, please see paragraph 1-GENERAL of Instruction Manual FR 7486825 for the Unit, supplied with the product.
CAUTION : All specic recommendations relating to the humidier are described below in paragraphs 3-DESCRIPTION,
4-TECHNICAL CHARACTERISTICS and 5-INSTALLATION/START-UP//MAINTENANCE.
CAUTION :
RESPONSIBILITIES
All personnel operating a humidier are responsible for:
-their personal safety, the safety of other people and the prevention of damage to the humidier
-the correct operation of the humidier
-electrical wiring must be installed in accordance with national standards, by qualied personnel..
These instructions explain how the humidier must be used.
These instructions are recommendations only, and do not replace the responsibilities set out above.
2 - OPERATING PRINCIPLE
Increasing the relative humidity by passing air through a matrix moistened with water is a simple, safe method of humidication, with
the benet of the adiabatic cooling generated and low operating costs.
100%
0
Outlet
conditions
Relative humidity (%RH)
Temp. (°C)
Inlet conditions
10 20 30 40 50 60
50% 20%
The dry air passes through an absorbent cellulose bre or breglass matrix and collects the water vapour located on the moist surface.
The water is distributed from the top of the matrix by a solid stainless steel nozzle bar and distribution cassettes located at the top of
each vertical row of matrices ensure even humidication.
20°C
32°C
32°C
Warm
dry
air
Damp
fresh air
without
aerosols
Water inlet

5
3 - DESCRIPTION
3.1 - General description of the humidier
Recirculated water model - RW
P
M
B
L
ED
K
B
I
C
B
J
F
H
O
J
Direct water model - DW
B
J
G

6
Component DW humidier
(without pump)
RW humidier
(with pump)
1. Water supply connection Std Std
2. Float ll valve Std Std
3. High and low water level sensor NA Std
4. Recirculation pump NA Std
5. 2-way valve
a. Manual NA Std
b. 24 VAC motorised - Two control points NA Option
6. Motorised 3-way valve Option NA
7. Supply solenoid valve NA Option
8. Medium cassette
a. 100 mm cellulose bre - 65% efcient Option Option
b. 200 mm cellulose bre - 85% efcient Option Option
c. 75 mm cellulose bre - 65% efcient Option Option
d. 150 mm cellulose bre - 85% efcient Option Option
9. Ø32 PVC pipe drain connector Std Std
10. Mineral salt deconcentration by
a. Deconcentration manifold NA Std
b. Conductivity sensor NA Option
(component 12 mandatory)
11. Flow balancing valve Std Std
12. Humidier control only with CCB box NA
Option
(including components 5b and
7)
13. Droplet separator
Std if:
- V>3 m/s cellulose
- V>3.5 m/s breglass
Std if:
- V>3 m/s cellulose
- V>3.5 m/s breglass
14. Submersible UV lamp Option Option
15. AHU control NA
Option
(including components 5b, 7
and 12)
WARNING : The humidier is pre-wired when option 15 (AHU control) has been selected. Otherwise, the installer is responsible
for wiring.
3.2 - General recommendations
■Recommendations for optimised operation
The air passing through the module must be ltered at least to ltration standards F7 and ePM1 50% in order to prevent fouling of the
humidier cassettes. Finer ltration may also be necessary in hospitals, food processing and electronics settings. We recommend that
a water lter be installed on the supply.
If the supply water for the humidier has a calcium content above the recommended level (see "drinking water network analytical
parameters" after component 9), we recommend that the water be demineralised.
When the humidier is the last component of the Unit, we recommend that an expansion valve be positioned 1,000 mm downstream
of the humidier.
■Recommendations for use in accordance with hygiene standard VDI6022
This adiabatic evaporative humidier option is certied in accordance with VDI6022 subject to certain restrictions and operating
conditions:
-The standard relates to RW and DW humidiers equipped with an inorganic breglass medium
-DW humidiers must be equipped with 3-way valves
-RW humidiers must be equipped with CCB control boxes (the option includes the supply and drainage solenoid valves)
-These humidiers and their control boxes are designed so that they ensure complete drainage of the water from the tank and the
supply and drainage pipes during one-off or permanent shutdowns of the humidication system for more than 48 hrs.
-Whenever the humidier is shut down, the Unit controller must ensure that the humidier media are dried completely.
-The water supply pipes must be equipped with a device preventing any water from returning to the drinking water column.
3 - DESCRIPTION

7
4 - TECHNICAL CHARACTERISTICS
4.1 - General characteristics of the humidier
■Permissible air ow in m3/hr, for DW and RW humidiers:
Size of the Air Handling Units 10 15 20 25 35 45 60 70
Without separator - cellulose bre 2927 4007 6167 8143 10336 12539 19559 21298
Without separator - breglass 3415 4675 7195 9500 12058 14629 22819 24847
With separator - cellulose bre + breglass 4878 6678 10278 13572 17226 20898 32598 35496
■Indicative water consumption (depending on air conditions)
• recirculated water (RW) dehumidier:
Evaporated water ow rate in l/hr with pump (pH neutral, medium TH), T°=30°C and 10% RH
Type of humidier medium Flow rate in l/hour for 1,000 m3/hr of air
Fibreglass or cellulose bre - 65% efcient 5.6 l/hr
Fibreglass or cellulose bre - 85% efcient 7.1 l/hr
Example: AHU025- humidier 85% -8,000 m3 /hr =8 x 7.1 = 56.8 l/hr
Deconcentration ow rate (to limit mineral salt concentration in the tank):
Deconcentration ow rate = see the "technical recommendations" paragraph in "mineral salt deconcentration by a. Deconcentration
manifold"
Water consumption = evaporation ow rate + deconcentration ow rate
• direct water (DW) humidier:
Evaporation module with continuous water supply.
Direct water supply in l/hr:
Air handling unit 10 15 20 25 35 45 60 70
Fibreglass or cellulose bre - 65% efcient 240 360 480 480 480 600 720 1080
Fibreglass or cellulose bre - 85% efcient 300 450 600 600 600 750 900 1440
Module casing 304 stainless steel
Max. inlet water pressure 6 bar
Max. inlet water temperature 15°C
Drain dimension 32 mm PVC piping
Min./max. air temperature on the humidier 5°C/40°C

8
4.2 - Characteristics of the components
1. Water supply connection
Technical characteristics 1/2" BSP-M stainless steel pipe
Technical recommendations Connect the mains water to the 1/2” BSP male connector oat valve with a shut-off valve. Apply sealant
before connecting. Ensure that the supply pipes can be uncoupled from the humidier downstream of the
shut-off valve, so that the humidier and the front panel can be removed completely in the event of heavy
maintenance.
2. Float ll valve
Technical characteristics 304 stainless steel
Technical recommendations The oat valve can be adjusted by 25 mm vertically using a 20 mm spanner, to adjust the tank water levels
(image 1). When the tank is full, the water level must be 3 cm below the overow. During operation, the
level must never drop below the foot of the pump, as this can damage the pump irrevocably (image 2).
The water level in the tank can also be adjusted by altering the rotation (max. 110°) of the oat, using a 10
mm spanner (image 3).
Images
1).
(*) 25 mm
2).
70 mm
3).
110°
4 - TECHNICAL CHARACTERISTICS

9
3. High and low water level sensor
Technical characteristics 304 stainless steel
Technical recommendations CAUTION: Remove the protective net from the oat before system start-up.
Low level: This connection is mandatory to protect the operation of the recirculation pump, as it activates
and deactivates the pump when it detects a minimum water level in the tank (if the humidier control option
has been selected  connector J17 on the SEF-028 card in the Control Box - NO contact).
High level: The maximum level is used as a safety system if the water supply oat valve fails. It must not be
used to control the water supply. If the equipment has a supply solenoid valve, connect it here so that it is
shut off by the safety system (if the humidier control option has been selected connector J16 on the
SEF-028 card in the control box - NC contact).
Images
BOTOM VIEW
S2
HIGH
LEVEL
S1
LOW
LEVEL
Pin assignment M12 socket, 8-pos., A-coded, view female side
N.C.= normally closed /
normalement fermé
N.A.= normally open / normalement
ouvert
C = Common / Commun
S1 (J17) LOW LEVEL - S1 niveau
bas
S2 (J16) HIGH LEVEL - S2 niveau
haut
S2
S2
(Vmax = 110 VAC)
Max.
level
Max.
level Filling
solenoid valve
Min. level
Pump
4 - TECHNICAL CHARACTERISTICS

10
4. Recirculation pump
Technical characteristics Stainless steep pump body + plastic accessories
Rated power 60 W (0.13 A) or 125 W (0.36 A) depending on size, medium and efciency.
400 V/3~+PE/50 Hz connection
Connection box: PG9 packing box, max. cable Ø = 8 mm. IP 54
Technical recommendations Connect the power supply line to the terminal connection box on the water irrigation pump.
Unless the control option has been selected (humidier only or AHU), the protection and power supply of
the pump must be determined by the system project designer. When option 12 - humidier control - has not
been selected, we recommend a thermal-magnetic circuit breaker with a rated current of:
0.1…0.16 A for the 60 W pump or 0.25…0.4 A for the 125 W pump.
Images
STAR CONNECTION
(400 V/III/50 Hz)
THREE-PHASE PUMP
WIRING DIAGRAM
Name Description
L1 Disconnecting switch for electrical isolation
SEL 1-2 3-4 5-6
1
0
X0 External housing
X1 Pump connection box (IP55)
Included if
there is a
control box
(humidier
control option)
Included on
the humidier
5. 2-way valve
Technical characteristics Valve connection: 1/2” G
Servomotor (motorised valve):
Power consumption 5 VA/3.5 W.
Supply voltage 24 VAC - 2 control points.
Cable cross-section 0.75 mm², length 0.9 m
Rated torque: 7 Nm.
IP54.
Technical recommendations Caution: In the event of a power failure, the motorised valve remains in the closed position. To drain
the humidier, the valve must be forced open on the servomotor (see image below).
See below
4 - TECHNICAL CHARACTERISTICS

11
5. 2-way valve
Images Manual valve:
Discharge/drain
valve closure
Discharge/drain
valve opening
Servomotor (motorised valve):
Settings: auxiliary contact
A, B
Factory setting
A = 5°
B = 85º
PIN Cable meaning
Code No. Colour 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 Neutral
Auxiliary
switches
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
4 - TECHNICAL CHARACTERISTICS

12
6. Motorised 3-way valve - (DW humidier only)
Technical characteristics Servomotor: as for the 2-way valve
Technical recommendations The 3-way valve is used to supply water to the media and to completely drain the pipes (thus preventing
water from stagnating in the system).
Images
ASSEMBLIES IN DIRECTION
OF WATER FLOW
DIRECTION
WATER SUPPLY FLOW
FLOW FOR MANIFOLD/IRRIGATION
SYSTEM DRAINAGE
Flow from
manifold/
irrigation
distribution
Flow towards
manifold/irrigation
distribution
Flow
towards tank
Water supply
7. Supply solenoid valve
Technical characteristics Rated power 8 W
Voltage: 24 VAC/50/60 Hz - NC contact
Valve connection: 1/2” G
IP55
Technical recommendations This valve is supplied unmounted. It should be located upstream of the oat valve, on the outside of the
unit. The high level on the level sensor must control this solenoid valve. It acts as a safety system in the
event that the oat valve fails. It must not be used to control the water supply. Control is managed by the
oat valve.
Images
NC lling/water supply
solenoid valve, ½” G, brass 24 V connector (L1+N+E) 24 V coil
(50/60 Hz)
4 - TECHNICAL CHARACTERISTICS

13
8. Medium cassette
Technical characteristics Cellulose bre:
Organic material.
- 65% efcient 100 mm
or
- 85% efcient 200 mm
Fibreglass: IARC Group 3 (not classiable as to its carcinogenicity to humans).
Inorganic material coated with a biocide (silver-zeolite). M0-A1 re rating. Contains silver ions that increase
the action against the development of microorganisms. Media compatible with hygiene standard VDI6022.
- 65% efcient 75 mm
or
- 85% efcient 150 mm
Technical recommendations The water quality and deconcentration system settings make it possible to improve the service life of the
medium.
Fibreglass can be cleaned with weak acetic acid (15-20%) or wine vinegar.
9. Ø32 PVC pipe drain connector
Technical characteristics Ø32 male PVC pipe
Technical recommendations Provide a glued coupling sleeve for Ø32 PVC pipe. Provide a drain trap, not supplied. Ensure that the drain
pipe can be uncoupled from the humidier, so that the humidier and the front panel can be removed
completely in the event of heavy maintenance. For the sizing of the drain trap, see § 7.1. Condensate drain
trap.
CAUTION : The drain pipe must be Ø32 or more for satisfactory draining of the water.
■Deconcentration system:
The water in the medium evaporates as the water vapour pressure in the medium is greater than the pressure of the air passing through
it. Given that only the water evaporates, the concentration of the dissolved mineral salts increases, despite the fact that water is added
to compensate for the evaporation.
To delay the formation of mineral deposits on the surfaces of the evaporation panel (which will result in a gradual increase in the air
pressure loss and a reduction in operational efciency), it is essential that some of the recirculation water is discharged to the drainage
network so that "clean" water can be supplied regularly.
Drinking water network analytical parameters (recommended).
• Water hardness (CaCO3): 50-170 ppm
• Chlorine (Cl): <55 ppm
• pH: 6-8
• Silicon (SiO): <30 ppm
• Iron (Fe): <0.2 ppm
• Oils and fats: <2 ppm
• Total dissolved solids: <550 ppm
• Total alkalinity (CaCo3): 50-170 ppm
• Suspended solids: <5 ppm.
For information:
ppm µS/cm °F (French degrees) hardness
0-70 0-140 0-7 very soft
70-150 140-300 7-15 soft
150-250 300-500 15-25 slightly hard
250-320 500-640 25-32 moderately hard
320-420 640-840 32-42 hard hard
above 420 above 840 above 42 very hard
Deconcentration and therefore the replacement of the recirculation water can be done in two ways:
a. by deconcentration manifold (continuously)
b. by conductivity sensor
4 - TECHNICAL CHARACTERISTICS

14
10. Mineral salt deconcentration by
a. Deconcentration manifold
Technical characteristics PVC manifold + balancing valve assembled on the humidier, located between the media water distribution
column and the drain (see image below).
Technical recommendations Extent of deconcentration or continuous draining based on conductivity.
■ Draining ow rate calculation via the ow control valve (see §11 below)
Draining based on the concentration cycle COC.
Draining ow rate = Evaporation/(COC-1)
Concentration cycle COC based on conductivity (100-1000 µS/cm)
Note: Always with the recommended drinking water network parameters.
• 100 µS/cm = 9 COC
• 550 µS/cm = 6 COC
• 1,000 µS/cm = 2 COC
■Water evaporation calculation:
Evap[l/min] = Qair x 60 x ρair x Woutlet - Winlet x 0.001
Qair: air ow [m3/hr]
ρair: air density [kg/m3] (≈ 1.2)
Woutlet = absolute humidity of air at outlet [g/kg]
Winlet = absolute humidity of air at inlet [g/kg]
Sample calculation:
• On the basis of the drinking water network parameters
• Water evaporation = 3.23 l/min
• Water conductivity = 550 µS/cm
• COC= 6
• Draining = 3.23/ (6-1) = 0.65 l/min
Otherwise, the system can be set to approximately 10% of the total irrigation ow rate (see §11 below). By
periodically observing the state of the panels; after 1 or 2 weeks of operation, if there are no white mineral
deposits on the surface,
the draining ow rate can be reduced, or, conversely, increased if scale is observed.
CAUTION: The continuous draining/deconcentration ow rate must not be less than 0.31
l/min
Images
10. Mineral salt deconcentration by
b. Conductivity sensor
Technical characteristics Conductivity sensor + control box expansion board
NOTE: humidier control option required.
Technical recommendations Screw the conductivity sensor onto the humidier tank.
Connect the conductivity sensor to board SEF-026 in the control box (component 12). Calibrate the sensor
with the calibration solutions supplied as accessories. Perform several media washing cycles (see §5) and
then congure the conductivity threshold on clean water, in accordance with the recommendations for the
humidier control option (see explanations in §7.7 of the manual supplied with the unit).
4 - TECHNICAL CHARACTERISTICS

15
11. Flow balancing valve
Technical characteristics Control valve + 1/2” brass ow meter.
Technical recommendations Adjust the evaporative cassette irrigation valves so that the surface appears evenly wetted; an empirical
value of approximately 1 litre/second per square metre of irrigation surface area will be sufcient to
compensate for the water evaporation.
The irrigation surface area is the width of the cassette x its thickness. Generally, it is sufcient to check that
the excess water from irrigating the panels is running into the tank.
Excess irrigation water is important to ensure continuous surface washing of the panels.
Sample irrigation per cassette:
Cassette width (500 mm) and Panel thickness (150 mm)
Irrigation ow rate per cassette = 0.5 m x 0.15 m x 60= 4.5 l/min
Control is carried out using a
at-headed screwdriver in
the location indicated
Control valve + ½” brass
ow meter to adjust the
irrigation of each cassette.
12. Humidier control only
Technical characteristics The Basic Control Box (CCB) is supplied separately, in an insulated housing made up of a base and a
cover with a steel hinge with an epoxy polyester powder surface nish in grey RAL 7035, weather resistant
(in accordance with IEC 62208) with degree of protection IP66 in accordance with IEC 60529 and impact
protection IK10 in accordance with IEC 62262.
CCB control box operating range: -10°C/40°C.
Technical recommendations (see MCCB manual §7) + wiring diagram in related documents (§6)
13. Droplet separator
Technical characteristics Polypropylene
Technical recommendations For high air speeds (V>3 m/s for cellulose media and 3.5 m/s for breglass media), the humidiers have a
second PP cassette that collects the droplets running off the media.
Images
4 - TECHNICAL CHARACTERISTICS

16
14. Submersible UV lamp
Technical characteristics Lamp submerged in the tank.
Supply voltage: 230 V/50 Hz.
Power: 18 or 36 W depending on model
IP68, CE
UVC lamp
Technical recommendations
Caution: These UV rays carry a strong risk of burning if they fall directly on the skin or
eyes! ! Disconnect the power before carrying out any work on the lamp !
A door safety contact is mandatory in order to disconnect the power to the UV lamp.
See MCCB manual §7 + submersible UV lamp manual §8.
15. AHU control
Technical characteristics See controls manual - FR 7486826
Technical recommendations See controls manual - FR 7486826
Caution: The unit controls govern the CCB control box. For this, "auto" mode must be
enabled on the box.
CAUTION : When installing an air handling unit containing a humidier with a recycling pump, it is IMPERATIVE that appropriate
systems for combating microorganisms and bacteria are put in place (this must only be done by personnel with the required
expertise).
It is IMPERATIVE that a risk assessment be carried out regarding the growth of microorganisms and bacteria, particularly
Legionella.
4 - TECHNICAL CHARACTERISTICS

17
5 - INSTALLATION/START-UP/MAINTENANCE
CAUTION : Fibreglass media may contain breglass dust
residue. On start-up, maintenance or replacement of the
media, remember to wear a FFP2 or FFP3 mask to protect
against the potential risk of inhaling this dust.
CAUTION : Humidiers have a high voltage power supply.
The wiring, connections and electrical connections must be
performed in accordance with national standards and by
qualied personnel.
The power supply must be disconnected during installation
and maintenance operations.
5.1 - Installation
1. Water connection (see components 1 and 9)
2. If the humidier is not wired (AHU control option not selected),
make the electrical connections for the pump, water level and,
depending on the options selected, the motorised 2-way valve,
motorised 3-way valve (for RW humidiers), supply solenoid
valve, conductivity sensor and submersible UV lamp (see
components 4, 3, 5.b, 6, 7, 10.b, 14).
3. If the humidier control and/or AHU control option has been
selected, secure the humidier CCB control box (component
12) to the front panel, run the cables through the packing boxes
and connect the cables to the connectors on the SEF-028 card
in the CCB control box (see MCCB manual §7). To connect
the humidier unit to the main unit, see the wiring diagram for
the AHU and the general IOM.
CAUTION : These electrical connections must be made by
qualied personnel. Select the correct cross-section for the leads:
see the technical characteristics of each component above.
If the AHU control or humidier control option has not been
selected, protect the power supply with a suitable thermal
circuit breaker.
4. Check that all the pipe connections are tight.
5. Check the direction of rotation of the pump.
6. After start-up, check that the input current does not exceed
the stated current.
5.2 - Start-up
CAUTION : The humidier control box (CCB) can be in manual
mode for the start-up settings, but if the AHU control option
has been selected, it is imperative that it be returned to "auto"
mode before standard operation, so that it is controlled by
the AHU PLC (component 15). See MCCB manual §7.
1. Clean the tank and check that it is clean before start-up
2. Adjust the balancing valves on each cassette (component 11)
3. Fill the tank with water, then adjust the water level with the
oat valve (component 2)
4. Adjust the deconcentration valve if the conductivity sensor
option has not been selected (component 10.a)
5. Install the control box, see MCCB manual §7 (component 12)
CAUTION : Before the AHU is started up (fan motor
assemblies not operating), perform several tank drainage
cycles after at least 6 hours of operation of the humidifier
only, to wash the cells and remove the scum and odour
that may have been caused by the inorganic material dust
remaining after the manufacturing process.
6.
CAUTION : For breglass media, avoid getting washing
water (which will contain breglass dust) in contact with
skin.
7. Filling the drain trap
CAUTION : Remember to isolate the supply and drain pipes
and the drain trap and provide a frost protection device for
the water in the drain trap to prevent freezing on installations
in environments where temperatures can drop below zero.
8. If the AHU control option has been selected, remember to
switch back to "auto" mode on the humidier control box.
5.3 - Maintenance
The main components that require maintenance are as follows:
-Once a month, the irrigation pump: The most important thing
is to check that dirt does not clog the suction and discharge
circuit and that electricity consumption is below the rated
consumption stated on the plate.
-Once a year, the oat valve: Its mechanical opening and
closing function must be inspected periodically.
-Once a year, the drain valves: Their mechanical control
function must be inspected periodically.
-Once a year, the solenoid valves (if any): Their mechanical
opening and closing function must be inspected.
-Once every three months, the evaporation panels: check for
wear and fouling due to lime scale deposits.
CAUTION : If there is visible deterioration of the breglass
medium, dispose of the medium (see § Disposal below).
Their service life, with a drinking water or industrial water
supply, depends mainly on the correct operation of the
continuous draining or mineral salt deconcentration system,
which prevents the formation of lime scale deposits on the
surface. If this is not well controlled, the panels will have to
be replaced very quickly, as the air will be prevented from
passing through them by the deposits. Fibreglass can be
cleaned with weak acetic acid (15-20%) or wine vinegar.
-Once a year, the irrigation: Follow the steps described on the
"Cleaning the individual irrigation system" page.
CAUTION : We recommend frequent observations in the days
following start-up, which will indicate the actual behaviour of
the installation. Similarly, during long periods of inactivity, it
is essential that the equipment be drained completely.
CAUTION : Before carrying out any work, remember to
deenergise all of the components (pump, UV lamp,
servomotors, etc.)
5.4 - Disposal of the product and efuent
generated
Comply with the regulations in force.
Please see paragraph 12-FINAL SHUTDOWN of Instruction
Manual FR 7486825 for the Unit, supplied with the product.
5.5 - Cleaning and disinfection
The water tank, irrigation system and other components of the
humidier are specially designed to drain completely by gravity,
without help from mechanical components.
Evaporative humidiers must be cleaned regularly to prevent them
from becoming contaminated; all of the surfaces of their
components (panels, pipes and particularly the water tank) must
be disinfected with an appropriate solution.
The use of chemical disinfectants for day-to-day maintenance of
the panels is not recommended, as it could reduce the efciency
and service life of the panel. If it is necessary to use chemicals,
either due to a long period of inactivity or for any other reason,
an effective method is to submerge the panels in a disinfectant
containing chlorine, such as sodium hypochlorite (bleach) or
sodium percarbonate. When using disinfectants containing
chlorine, it is imperative that you take into account the fact that
toxic chlorine gas forms if they are combined with an acidic
solution.
The composition of the inorganic breglass panel includes agents
that inhibit the growth of bacteria and fungi, such as silver and
zinc pyrethrin. These agents are bacteriostats, not disinfectants.
We recommend that treatment be added to the water used to
supply the humidier.

18
HEF2E humidiers have obtained a "hygiene compliance test"
certicate. They meet the requirements of the following standards:
Air conditioning:
• VDI 6022, part 1 (07/2011)
• SWKI VA104-01 (04/2006)
• VDI 3803, part 2 (02/2010)
Hospitals:
• DIN 1946-4, (12/2008)
All of the materials included in the humidier have obtained
negative results regarding the proliferation of pathogenic
microorganisms. The non-metal components meet the requirements
of UNE-EN 16421:2015 “Inuence of materials on water for human
consumption: Enhancement of microbial growth”.
To ensure satisfactory operation in accordance with hygiene
standard VDI6022, maintenance must be performed regularly in
accordance with the instructions given in table 6, §6.6 of VDI 6022;
a maintenance log must also be kept.
5.6 - Removing the media
B
°
Remove the manifold + evaporative cassette irrigation ow control valve assembly.
Unscrew the connections on each irrigator Unscrew the connections
Manifold + irrigation ow control valve assembly
c
a b
5 - INSTALLATION/START-UP/MAINTENANCE

19
C
°
Remove the PVC-U D25 pipe for assembly to the manifold
a
b
Unscrew the PVC-U DN20 ball check valve
connection
PVC-U D25 pipe
D
°
Remove the front cover
Unscrew the two screws holding the part in place
Front cover
a
b
5 - INSTALLATION/START-UP/MAINTENANCE

20
E
°
Removing the drain
Unscrew the brass connector on the control
valve + drain ow meter Unscrew the PVC-U 1/2" connection Drain
a a a
F
°
Removing the bracket + pump + level sensor assembly (as an option,
the oat valve might be mounted on this bracket)
Unscrew the bracket
If the oat valve is mounted on the bracket,
disconnect the water supply
a
b
G
°Removing the droplet separator
5 - INSTALLATION/START-UP/MAINTENANCE