CIAT CLIMACIAT airtop Series User manual

10 - 2013
NA 03.28 D
airtop
airtech
airclean
Instruction manual

EN
EN - 1 NA 03.28 D
Meets European standard EN 13053
1 - Introduction 2
1.1 General safety instructions 2
2 - Delivery and Handling 2
2.1 Receiving and storing the unit 2
2.2 Location 2
2.3 Setup 3
3 - Installation 3
3.1 Special recommendations 3
3.2 Assembly - Fitting 4
3.3 Filtration 8
3.4 Water and direct expansion coils 8
3.5 Electric heaters 10
3.6 Control system 11
3.7 Fan motor assembly 11
4 - System start-up 13
4.1 Connecting the electric motor 13
4.2 Blade damper 14
4.3 Electric heater 14
4.4 Water humidifier 14
5 - Maintenance 14
5.1 Casing 14
5.2 Dampers 14
5.3 Air filters 15
5.4 Humidifiers 15
5.5 Fan motor assembly 16
5.6 Sound attenuator 17
5.7 Heat recovery units 17
5.8 Preventive maintenance 19
5.9 Cleaning the units 19
6 - Warranties 20
6.1 Duration of warranty on coatings applied to outdoor air handling units 20
6.2 duration of the air handling unit warranty 20
7 - Special information for ATEX areas 21
7.1 General information 21
7.2 Marking 21
7.3 System start-up, maintenance 21
7.4 Using tools in an explosive atmosphere 22
8 - Meaning of the pictograms 23
9 - CE certificate 23

NA 03.28 D EN - 2
1. INTRODUCTION
This manual must be read before placing, installing or servicing the air handling unit.
Failure to follow the instructions in this manual could damage the air handling unit and will void its warranty.
CLIMACIAT air handling units are intended solely for the purpose of handling air. No other uses (storage, etc.) are allowed. They should
never be used for any other purpose (storage, support, etc.).
1.1 General safety instructions
The following must be performed before servicing the air handling unit:
- The power must be switched off (proximity switch)
- The fan must be stopped (WARNING: it may take several minutes to stop completely)
- Electrical equipment must be switched off (electric heater, humidifier, purifiers, etc.)
- Work must be carried out by an accredited technician.
- PPE (Personal Protective Equipment) must be used for all work.
2. DELIVERY AND HANDLING
2.1 Receiving and storing the unit
The condition of the unit must be inspected upon receiving it.
In case of damage, specify this in full on the delivery note, indicating the type of problem (upper panel dented, coil damaged, etc.).
Confirm your observations concerning the damage with the carrier by registered letter within 48 hours of delivery and send a copy to
your CIAT representative.
NB: terms such as "pending unwrapping" and "unit damaged but packaging in good condition" are not admissible by insurance
companies.
For all other problems, please contact your CIAT representative for further information.
The unit must be stored in its packing and sheltered from weather.
To facilitate the assembly of multisplit units, their components must be kept in the relevant groups. Refer to the dimensional drawings
and identification labels placed on each section (see below).
1: Order number. Use in all correspondence.
2: Section number
A1, A2, ….A9: multi-section unit.
A second unit may bear the markings B1, B2, ….B9.
The numbers 1, 2 and 3 do not necessarily indicate the order of
assembly (refer to the dimensional drawing).
A9, B9…: markings for all accessories: assembly, roofs, canopies,
gaskets, fastenings, etc. of the corresponding unit.
3: CIAT internal production order.
4: CIAT internal coding.
5: Your name or company.
6: Internal pre-shipping check.
7: Your reference (if applicable).
8: Weight of corresponding block.
9: Block year of manufacture.
10: Centre of gravity to facilitate
positioning of the lifting beam.
11: Manufacturer's name and address.
12: CE marking.
Machinery directive 2006/42/EC.
EMC directive 2004/108/EC
Pressure equipment directive 97/23/EC
2.2 Location
The air handling units are relatively large. Extra attention is required when choosing where to place them.
As is generally the case with boilers and refrigeration units, we recommend installing the air handling units in machine rooms that are
sufficiently insulated from adjoining rooms.
5
4
3
1
7
8
10
11
12
9
6
2

EN
EN - 3 NA 03.28 D
It is also important to leave sufficient space around the units to allow access to the
various components: bearings, belts, motors, filters, coils, etc. Refer to the diagram
below to ensure trouble-free maintenance.
a clearance of 600 mm is recommended for assembling the sections
2.3 Setup
Handle the boxes carefully. Lift them using a lifting beam suitable for the size of the unit (refer to the diagrams below), two steel tubes
(minimum diameter 1": 33.7 mm external; maximum 1¼": 42.7 mm external) and straps, as per the handling instructions (minimum
angle of 60°).
Important: Make sure that the spreader beam is sufficiently large so that the straps do not press against the unit and the steel tubes
are immobilised while moving the unit.
Limiting sideways movement
If using a spreader beam is not possible, the unit may be lifted using a forklift truck provided
care is taken to avoid denting the bottom panel (use sufficiently long forks).
Follow the applicable handling rules.
3. INSTALLATION
The equipment must be installed in accordance with the legislation applicable to the installation site.
3.1 Special recommendations
- Connections must not place mechanical stresses on the unit.
- Air and hydraulic pipes must be secured using supports.
- Keep all inspection doors closed while the unit is operating.
- A safety device in case of insufficient air flow must be integrated
in the fan control.
- For outdoor installations, units must be installed in accordance
with best industry practice to withstand the weather conditions in
the installation location, (risk of snow: height of installation from the
ground, risk of wind: adapted mountings, etc.).
Make sure to ground all electric components.
NOTE: For large units (plate/wheel recovery units, mixing units,
etc.), the transport brackets located at the corners must be removed
upon delivery.
600 mm


Flexible sleeve
Transport legs

NA 03.28 D EN - 4
3.2 Assembly - Fitting
The damper sleeve and ducts are connected to the AHU using 5.53 sheet metal screws.
The box(es) making up the air handling unit must be installed on a flat, sturdy surface. To ensure a tight seal between joined
sections, they must be shimmed and levelled to compensate for any unevenness of the mounting surface.
Connection components
Use securing devices at the ends
Fit anti-vibration mounts:
Insulating foam block + intermediate plates between frames
Always place the unit(s) on a counterframe when adding anti-
vibration mounts (frame and mounts to be provided by customer)
Intermediate mounts prohibited
(deformation of the lower block)
 Assembling the two blocks
- Check the flatness and levelness of the
mounting surface.
- Fit the gasket on the sealing face between
the blocks (fig. A).
- Using the appropriate handling equipment,
place the two sections to be joined as close to
each other as possible.
- The blocks are assembled on the same
level by connecting the frames or the feet
using connection components (fig. B). Secure
outdoor units using a TH 8 x 70 screw,
washers and nuts (fig. C). A plate provides
a seal between the two casings (fitted with
mastic) (see fig. D in the outdoor assembly
section)
If assembling the sections vertically, the top
section must not be mechanically fastened to the
bottom section. Its weight will keep it in place.
Before tightening the brackets, seal the
sections with a gasket or caulking.
Attachment screw
Gasket or mastic




Spirit level


EN
EN - 5 NA 03.28 D
Fastening clamps are supplied for a tighter fit between sections
on size 150 and higher air handling units. They may be placed
on the sides or tops of each section.
- Trace the mounting holes (centre distance: 38 mm) and drill a
diameter 4 hole.
- Attach the clamps with the screws supplied.
- Join and tighten the clamps together with the two 6 x 60 mm
screws, washers and nuts.
Comment: these clamps cannot be used on access panels.
Do not use the fastening clamps to compensate for
misaligned sections.
Where possible (door nearby, footprint, etc.) the clamps may be tightened on the inside with TH 6 x 60 bolts.
An optional decorative trim is available for bottom AIR CLEAN units only.
 Dual-flow assembly with stacked casings (A) and (B)
The unit can be assembled in one of two of ways depending on its size:
25 to 75 units: affix the feet of block B to the intermediate panel using two TH 6x20 screws. Holes are provided for this purpose.

100 to 600 units: affix the brackets to the feet of block B, and the mounts to the panel using the screws provided. Assemble using two
screws (6x120), washers and nuts.
Sizes 25 to 75 Sizes 100 to 600
B
15 x 8 mm
gasket
2 cleats
1 M6x60
0.250
EXT. CONN
Block

NA 03.28 D EN - 6
 Assembling stacked casings (A and B) with a thermal wheel recuperator (C)
Fasten the feet on section B to the middle panel (1) with two TH 6 x 20 screws in the
holes provided.
Holes are provided for this purpose.
 Assembling adjacent casings
The first air stream (fig.1) is installed in the same
way as on horizontal air handling units. (see block
interconnection).
The second air stream is connected to the outside
(Fig. 2) in the same ways as the sections. The
insides (inaccessible) are connected from inside
when possible and/or using the outer lugs on the top
of the box (impossible on outdoor handling units on account of the roof).
 Ceiling installation
Suspended units must be placed on a metal section
suspended from the building structure. Each pair of feet
must rest on a metal section. Each pair of feet must rest
on a metal section.
These sections are to be provided by the fitter and must
be cut to suit the layout of the room and be sufficiently
rigid. The sections should not block access to the drawers
and doors on the unit. Leave space for platform access on
the connections side.
 Outdoor installation
Air handling units installed outdoors must be protected by
a roof (Fig. 1) or overhang (Fig. 2). These components
are generally delivered in kits and adapted to each
configuration.
 Fitting the roofs
Affix the gasketalong the length of the unit
(50 x 20 foam gasket).
Fit the roof panels along the entire length of the unit, placing a foam seal (supplied by
CIAT) between each panel.
Assemble the panels as per the roof diagram and drawing
supplied with the unit
Assemble the panels to side A of the unit as shown in the
drawing opposite:
Then assemble the panels to side B, pressing on the roof to
create the curve. Fasten the panels to the box.
12
a: M6 x 16 screw
b: sealing washer
c: gasket
Overhang
A
B
1
C
a: sealing washer
b: self-tapping screw (supplied)
c: sealing rivet

EN
EN - 7 NA 03.28 D
In addition the rules mentioned on the previous pages, special care must be taken with the hydraulic system (do not forget the risk of
freezing temperatures).
If the unit is fitted with an external air intake, we recommend protecting it from prevailing winds and any exhausted air or gases
(chimneys, roof extractors, etc.). Follow the requirements in standard EN 13779.
If the unit is installed on a deck or patio with a top intake and/or discharge, the unit must be placed above the roof or deck/patio.
Locations where ducts and pipes extend through the roof or deck/patio must be completely watertight.
 Counter frame sealing for outdoor installation
Caulk during assembly
 Fitting the canopies
Assemble the top panel (1) to its two side panels (2) and (3) with 6 mm screws, washers
and nuts or rivets.
Affix the sealing gasket (4) around the edge of the canopy and apply mastic if necessary.
Fit the screen and the canopy and affix the assembly to the unit using diameter 5.53 sheet
metal screws and washers
 Mounting brackets
To guarantee a greater clearance height, fit raised feet under the standard frame feet.
24
1
3
a
b
c
d
e
a: sealing rivet or M6 x 16 screw
b: M6 sealing washer
c: M6 plain washer
d: M6 external tooth lock washer
e: M6 nut
The canopy is delivered in a kit. Drill the
necessary holes in the box during assembly.
Extension leg (100 mm/200mm/300mm) Adjustable leg (option).

NA 03.28 D EN - 8
3.3 Filtration
- G2 filters: the cell may be inserted in any direction regardless of the direction of air flow,
- G4 filters: the mesh holding the medium in place must face the discharge air side,
- HPS bag filters HPS (F6, F7, F8), high-efficiency and HPR filters: the cells on the frame side must face the incoming air,
- HEPA filters (H10, H14): refer to the instructions supplied with filters for information on fitting and maintaining them,
- Carbon filters: refer to the instructions supplied with the filters.
G2 and G4 filters are supplied fitted on the unit. Other filters are supplied in their packing.
G4 filter HPS filter HPR or carbon filter HEPA filter
3.4 Water and direct expansion coil
Do not remove the protective caps until you are ready to connect the coils.
 Coil with water supply
Always use two spanners when connecting or tightening the hydraulic couplings to avoid twisting the pipes and applying stress on
the welds. Check the tightness of the connections before installing heat insulation or filling the system with water.
If flanges are used, provide enough clearance for the frost protection sensor drawer or the droplet separator drawer.
The flanges should be offset.
 Supplying the coils
Warning: water + glycol = risk of burns and toxic if ingested
Refer to your dimensional drawing for the diameters of the connections and their positions.
Check the connections for leaks after 24 hours.
 

EN
EN - 9 NA 03.28 D
 Coil maintenance
- Clean air is essential to the efficiency of the unit. Use an air filter.
- The coil may be cleaned with compressed air. However, make sure particles are not blown into any other sections of the unit.
- If a glycol/water mix is used in water-cooled heat exchangers, check the glycol/water ratio.
- If the coil is extremely dirty, disassemble it and clean it with a high-pressure washer. Keep the lance perpendicular to the coil surface.
Take the necessary steps to protect the coil from the risk of freezing temperatures.
 Heating coil
Check the operation of the frost protection thermostat (option) at the start of each winter.
If the outlet temperature on the frost protection coil is below 15°C, use a constant-volume control valve to prevent the frost protection
alarm being triggered and frost forming on the coil.
 Cooling coil
Clean and replace the cells on the droplet separators as often as necessary. Prime the siphon at commissioning or each time the unit
is stopped for extended periods. Keep the condensate pan and drain clean.
 Siphon (recommendations)
Install a drain and a bleed valve on the supply pipes in accordance with accepted industry practices.
Install a siphon and a vacuum breaker to discharge condensate from the cooling coils. Their height should be equal to twice the negative
pressure of the unit.
Handling units requiring more than one siphon:
Install siphons and vacuum breakers as shown in diagram 1.
diagram 1

NA 03.28 D EN - 10
 Direct expansion coil
Installation must be performed by qualified personnel.
For coils containing "SPLIT SYSTEM" refrigerant, the unit must not be stored near to a source of heat or in direct sunlight (increase in
refrigerant pressure).
 Droplet eliminator
They are placed downstream of the cooling coil. Clean them once a year with suitable products to remove any deposits. Specially
designed products are available for this operation.
3.5 Electric heaters
Electrical connection and control with the fan motor assembly:
Always follow general safety instructions and especially current standards (e.g. NFC 15-100 on overcurrent and overvoltage protection)
when making electrical connections.
Always install an air flow pressure switch (control lot) and program a fan delay time of several minutes.
Connect the electric heater with high-temperature wires. Take into account the temperature inside the electric heater when selecting
these wires.
Example: for a 2.5 diameter, 50 m cable (4 conductors), the following are available:
- 80°C high temperature cable: Max current: 45 A - 120°C high temperature cable: Max current: 27 A
Connect these wires to the designated terminals and the terminals on the manual and automatic reset thermostats (depending on unit)
inside the box.
The stages (power-connection terminals) are identified with labels of the same colour.
If there are three stages, there will be three sets of these labels.
The connections must be made as per the schematic diagram (example for
connection of two heaters
NB: Do not earth the electric heater (class 2 insulation). Instead, make a connection to the casing as close as possible to the heater.
Power
1 ph 2 ph 3 ph
Q: main disconnect switch
QV1: fan motor thermal-magnetic circuit breaker
KV1: fan motor switch
MV1: fan motor
QR1: electric heater thermal cut-out
KR1: electric heater switch
R1: electric heater
QR2: electric heater thermal cut-out
KR2: electric heater switch
R2: electric heater
QT1: remote control thermal cut-out
INT: on/off switch
K1: time-delay relay
PA: flow rate controller
BSC1: Electric heater safety thermostat
automatic reset
BSC2: Electric heater safety thermostat
manual reset
BSC3: Electric heater safety thermostat
automatic reset
BSC4: Electric heater safety thermostat
manual reset
TH1: room thermostat
TH2: room thermostat
 example:
12
FAN MOTOR ELECTRIC
HEATER ELECTRIC
HEATER
Power circuit supply
Control circuit

EN
EN - 11 NA 03.28 D
Retighten the connections after 48 hours of operation.
A suitable air flow rate controller (pressure switch, switch indicator, etc.) must be placed in the circuit to shut off power to the heaters
should an air flow fault occur.
CIAT shall not be liable if this requirement is not followed.
Never operate the coil with the fan off.
For the variable-speed motors, the power dissipated by the coil must be proportional to the motor rotation speed and adjusted gradually.
For a two-speed motor, the control system is configured so that the reduction in the air flow results in a proportional reduction in the
heater power.
For example: 1500 / 750 rpm, coil capacity of 30 kW.
At low speed, the power dissipated by the heater must be reduced by 50% and not exceed 15 kW.
A number of factors can cause general overheating of the electrical elements, which can lead to the thermostats being triggered:
Examples:
- turning on the unit without the fan,
- filter fouling,
- reversed fan rotation,
- faulty operation of the air dampers,
- insufficient voltage to the fan motor assembly belt.
3.6 Control system
If the air intake is fitted with a motorised damper, the fan should not operate unless the opening limit switch is tripped.
If a two-speed motor is used, the shift from high to low speed should be timed to avoid a braking effect.
3.7 Fan motor assembly
The spring-mounted fan motor assemblies (AIRTECH, AIRCLEAN ranges) are locked in place during shipment by three fasteners placed
on either side of the support frame.
Remove the shims after installing the unit.
The direction of rotation must match that indicated on the fan.
In most cases the drive is fitted before leaving the factory. All that needs to be done is to retension
the belts after 24 hours of operation. The tension depends on the belt type, the power to be
transmitted and the rotation speed.
Overtensioning the belts will result in accelerated wear of the bearings. Undertensioning the
belts will cause them to slip and wear down.
Place two strips of opaque adhesive tape exactly 250 mm from each other.
Gradually tighten the belt in successive increments until the gap between the two adhesive tapes reaches:
an extension of 0.4% to 0.6%, (0.4% = 251mm and 0.6% = 251.5mm).
Do not use the existing marks on the belts as a reference.
Tension the belts as shown in the photos below:
If the drive and/or motor is to be delivered later, proceed as follows:
- Clean the shafts and keys,
- Select the corresponding pulley,
- Insert the pulleys or the bushes,
- Align the pulleys.


NA 03.28 D EN - 12
 Aligning the pulleys
by placing a ruler flat against the pulley flange and adhering to the data below.
for variable-diameter pulleys, align them along the centre line.
- Hold the pulleys in place with the appropriate tool,
- Fit the belts,
- Tension the belts as instructed in the previous section.
If changes are made to the drive, make sure that it is compatible with the fan motor assembly, motor current and the suspensions.
 Direction of rotation of the impellers
Option: device to measure and check the air flow. Used on centrifugal fans and plug fans.
Centrifugal fan
Low pressure
Centrifugal fan
Moderate pressure
Plug fan
Seen from intake side


Dmax < 0.5°
Emax < 4 mm per metre of centre distance
Alignment axis

EN
EN - 13 NA 03.28 D
4. SYSTEM START-UP
Keep all inspection doors closed while the unit is operating.
A safety device protecting against insufficient air flow must inserted in the fan control.
Connect all electric components to earth.
4.1 Connecting the electric motor
The connection must be made by a qualified technician, as per the diagrams below and those included with the motor.
Before powering up the motor, test the insulation resistance. Failure to follow this recommendation will void the motor
warranty.
 Operating mode:
 Before carrying out any work, disconnect and uncouple the motor or the driven machine.
 Measure the motor's insulation resistance before starting it up, particularly if the windings may be wet.
- !#!$
- The insulation resistance value is reduced by 50% if the room temperature increases by 20°C.
 Fit the motor casing and discharge the cables against the casing immediately after each measurement to prevent the risk of electric
shocks.
 If you do not obtain the reference resistance value, the windings are too wet. They must then be dried in an oven at a temperature of
90°C for 12 to 16 hours, then at 105°C for 6 to 8 hours.
- During drying, remove the covers from the bleed holes and open the closure valves (if fitted to the motor). Remember to close
them after drying. If the bleed caps are fixed, it is recommended to remove the terminal box flanges and covers for the drying
operation.
- Windings which have taken in sea water must normally be rewound.
The motors are equipped with a heat protection sensor which must be connected. Check the supply voltage, the input current and
the calibration of the protective devices.
For motors with a power of 5.5 kW or above, we recommend Y/'starting in order to limit the starting current (Id/In) and reduce the
wear on the drive.
 Dual voltage type motor with Y coupling, '(6 terminals):
230/400 V motor
- 230 V supply voltage, connection ('): diagram A. - 400 V supply voltage: (Y) connection: diagram B.
400/690 V motor
- 400 V supply voltage, connection ('): diagram A. - 690 V AC supply voltage (for P>5.5 kW), connection (Y): diagram B.
 Dahlander dual-speed motor or motor with reversible poles, 6 terminals.
These diagrams apply to three-phase, 3000/1500 rpm and 1500/750 rpm motors.
Low
speed
(LS)
High
Speed
(HS)
LS and HS for “2” contacts
A
B

NA 03.28 D EN - 14
 Dual-speed motors: two separate windings, 2 x 3 terminals.
These diagrams apply to three-phase, 1500/1000 rpm motors.
Low speed
(LS)
High Speed
(HS)
LS and HS for “2” contacts
These wiring diagrams are inside each terminal box.
Retighten the connections after 48 hours of operation.
 Frequency inverters
Recommendations:
 The motor must be connected to the inverter using a shielded cable;
 The sizing of the inverter depends on the distance between the motor and the inverter;
 Before starting up the system, the upper frequency must be limited to prevent the maximum speed of the rotating parts from
being exceeded or the motor from being overloaded;
 Eliminate the frequencies producing resonances by checking the operation of the fan one frequency at a time.
 Fit Du/Dt filters on the inverter side for the 690V networks.
4.2 Blade damper
Do not turn on the fan with the blades closed.
When the unit is shut down, ensure a time delay on the dampers (or a leakage rate) equal to the fan's inertia time or the time required
for the heat to be evacuated from the electric heater.
4.3 Electric heater
Never operate the coil with the fan off.
Always install a fan delay.
4.4 Water humidifier
Check the direction of rotation of the pump.
Refer to the documentation delivered with the pump.
5. MAINTENANCE
5.1 Casing
The boxes have smooth internal walls. The rate of cleaning will depend on the application and outdoor environment. Check the casing
at least once a year.
Do not clean the air handling unit with a high-pressure washer.
5.2 Dampers
Periodically check the condition and operation of the dampers.

EN
EN - 15 NA 03.28 D
5.3 Air filters
Filter fouling can be determined by testing the pressure drop.
CIAT's range of AIR air handling units are fitted with pressure tappings.
The various types of filters are shown in section 3.
 G2 filter
The cells must be periodically vacuumed. To remove greasy dust, the media may be cleaned with warm water (50°C max.) and detergent.
 G4 filter
G4 cells are generally non-regenerative. They must therefore be replaced as often as necessary. During assembly, make sure that the
screen is positioned on the "discharge air" side.
 HPS bag filters (F6, F7, F8)
Bag filters last a long time but are non-regenerative. They must be replaced when they are clogged. Check the condition of the fasteners
and gaskets. Bag filters may be fitted in compressible channels or encased in universal frames with gaskets.
 High-efficiency and HEP filters (H10-H14)
These come in large-media frames. Follow the assembly and maintenance instructions provided with the cells.
 Carbon filters
There is no way to know when breakthrough will occur on a carbon filter.
Its service life depends on how it is used:
- type of impurities to be filtered,
- concentration of these impurities,
- average usage time,
- air flow.
To find out the how long a filter will last under your specific conditions of use,
contact the manufacturer of the filter.
Wear gloves and protective clothing when changing the filters. Place the dirty filters inside bags.
 Droplet separator
Depending on the type of extraction, the separator frames can be disassembled as follows:
 Side extraction:
1. Remove the separator's side access panel (4 screws)
2. pivot the 2 retaining brackets to release the separator (1 at the top, 1 at the
bottom)
3. pull the separator towards you to remove it from the unit
 Frontal extraction:
1. open the separator's access door (opening handle)
2. pivot the 2 retaining brackets to release the separator frames
(1 at the top, 1 at the bottom)
3. detach the frame from its runner in the direction of the air flow (removal via a recess in the runner)
4. if the separator is made up of several frames, slide the second one to position it opposite the recess and detach it, etc.
When refitting, remember to lock the frames using the retaining brackets.
Compressible track Universal frames
Frame
Frontal
extraction
Side
extraction
Retaining
bracket

NA 03.28 D EN - 16
5.4 Humidifiers
The type of humidifier used and the water quality must comply with the
regulations in force.
The upper limit value for non-pathogenic bacteria is 10,000 CFU/ml (Colony Forming Units).
However, it is best to check and clean the air handling unit from 1,000 CFU/ml onwards
(standard EN 13053). An overflow with siphon must be installed on adiabatic humidifiers.
UV treatment and cleaning are recommended.
 Steam humidifier
Ordinary maintenance simply involves having the steam cylinder replaced and the
unit cleaned each year. This must be carried out by a qualified technician.
 Cleaning or replacing the steam cylinder
This is necessary when deposits on the active surface of the electrodes prevent normal current flow (alarm E06, E08).
Disassemble the cylinder as follows:
- Press the manual drain button to completely empty the water in the cylinder,
- Remove the cylinder steam hose,
- Disconnect the main electrodes and the level electrodes,
- Remove the retaining spring and twist off the cylinder.
The steam cylinder can generally be reused after descaling (scale on the electrodes prevents the free flow of water and current).
Unscrew the clamp and remove the bottom filter. Flush away any mineral debris in the cylinder under running water and clean the grilles
with an off-the-shelf cleaner.
Replace the cylinder if the electrodes are too badly corroded. Only the cylinder body and
O-ring need to be changed (do not change the capping ring, seat or filter).
Reassemble the cylinder by following the above steps in reverse order after checking or
replacing (if necessary) the seal between the coupling and the drain unit.
 Cleaning the unit and seasonal servicing
Check and clean the unit once a year. Drain the unit and disconnect it from the power source
before doing so:
- Disassemble or wash the water supply valve and check the cleanliness of the inlet filter,
- Remove the drain unit and clean the lines and nozzles,
- Inspect the water supply, steam supply and condensate drain pipes and replace them
if necessary.
 Servicing frequency
- Check the connections each time the air handling unit is turned on,
- Check the condition of the cylinder. If necessary, replace it once every three months,
- Retighten the electrical connections and check the components and
correct diffusion of steam each year.
For further information, refer to the manufacturer's instructions delivered with the
unit.
 Water humidifier
>Spray (Fig. A)
It is recommended to service it twice a year:
- Clean the pan,
- Check the drain outlets,
- Check the cleanliness of the runoff screens (if a problem is found, check the upstream filtration or the water pH) and correct as necessary,
- Replace the screens if necessary,
- Clean the spray washers (option).
For further information, refer to the instructions delivered with the unit.
>Run-off (fig. B)
It is recommended to service it twice a year:
- Clean the pan,
- Check the drain valve flow rate,
- Check the drain outlets,
- Check the cleanliness of the cell module.
Cylinder
Filter
Gasket
Raceway
End piece
fig. A fig. B

EN
EN - 17 NA 03.28 D
5.5 Fan motor assembly
Theoretically, the scroll housing, impeller and shaft require little servicing unless the air drawn in is dirty and unbalances the impeller.
If the air is very dirty, check the filters and their assemblies.
Once a year check the anti-vibration mounts, the sleeve seals, etc.
 Bearings
The rate at which the bearings require servicing depends on the fan usage conditions.
Most of the fans are fitted with permanently lubricated bearings. Under normal operating conditions,
they will last for 20,000 hours of operation.
Special lubricants may be used for certain applications.
We recommend lubricating other bearings once every 7,000 hours of operation.
 Drives
Refer to section 3 on the fan motor assemblies.
5.6 Sound attenuator
No special servicing is required for the sound attenuator baffles. However, we recommend
checking the outside once a year to avoid fibres coming loose and clogging the filters
downstream.
5.7 Heat recovery units
 Plate recovery units
Once a year, dust off and degrease the plate heat exchangers and service the control
valve if a bypass is fitted.
Also check the frost protection coil upstream of the cross-flow exchangers.
 Thermal wheel recuperators
Check the maximum and minimum rotation speeds once a year.
Dust and humidity build up at the bottoms of rotary heat exchangers when they are not
in use.
Clean them if they not to be used during extended periods.
Check the permanently lubricated bearings once a year.
If assembled with a speed controller (variable-speed thermal wheel recuperator), refer to
the manufacturer's instructions
 Rotor
Periodically check both sides of the rotor for dirt. Clean off any dirt with compressed air.
A suitable detergent may be used to clean off stubborn dirt.
Also check if the upstream filters are clean and ensure a tight peripheral seal.
 Heat exchangers on coils filled with glycol/water mix
Refer to section 3.
 Heat-pipe heat exchangers
Refer to section 3.

NA 03.28 D EN - 18
 GGS warm air generator
See the instructions provided with the unit.
 MK D and MK V air stream gas generator
The electrical panel is delivered as standard on the front panel.
Generator delivered in a crate, not fitted to the unit. To be assembled on site by the fitter.
 Outdoor MK D and MK V air stream gas generator machine room
See the instructions provided with the unit.

EN
EN - 19 NA 03.28 D
5.8 Preventive maintenance
All equipment must be serviced and commissioned by qualified personnel.
This table relates to "standard" use of our units and is provided for guidance only. Servicing frequency rates must therefore be adjusted
based on your conditions of use.
5.9 Cleaning the units
On site: Keep the units wrapped for as long as possible. Upon unwrapping them, immediately make the air connections and keep the
boxes closed.
Before turning on and installation, vacuum the inside of the air handling units and, if necessary, clean the panels with a spray bottle
of solution and a soft cloth. Start up the system with just the prefilters (dust in the ducts, etc.). Wait a few hours; change the filters if
necessary and then fit all the filter stages.
 Cleaning in cleanrooms and associated controlled environments
Follow the procedures in force on the site of installation.
Cleaning and decontamination can be reduced to a strict minimum with the right filtration and by following the relevant procedures.
High-pressure washers are sources of contamination and therefore prohibited. Clean with either a spray bottle filled with a cleaning
solution or disinfectant and soft cloth or special wipes.
Reminder: Contaminants may be brought in each time a door is opened in a cleanroom or associated controlled environment.
COMPONENT OPERATIONS REQUIRED RECOMMENDATION
FAN
Check the cleanliness of the housing 3 months
Check the impellers or rotating parts (visual check) 3 months
Check the bearings (noise) 3 months
Lubricate (depending on fan) Every 20,000 to 30,000 hrs
Check the mounts (visual check) 3 months
Check the fasteners (visual check) 3 months
Check for corrosion 6 months
MOTOR
Check the bearings (noise) 3 months
Check the fasteners (visual check) 3 months
Check the connections 6 months
DRIVE
Check its condition. Replace if necessary. 3 months
Check the tension of the belts 3 months
Check the alignment 3 months
Check for vibrations and retighten the casing 3 months
FILTRATION
Regularly check the fouling level 3 months
Check entire assembly for leaks 3 months
Replace as recommended by the manufacturer
SOUND ATTENUATOR
Check the cleanliness of the baffles 3 months
Check for tears in the baffles 3 months
COIL
Check the cleanliness 3 months
Check the level of antifreeze varies by operating conditions
Drain the coil varies by operating conditions
BURNER Service and adjust (gas qualification) Before start of warm-up
HUMIDIFIER see humidifier manual