Daikin D-EIMAH00105-15 Operation manuals

Installation, use and
maintenance manual

Professional

D-EIMAH00105-15_01EN

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Translation of the original instructions

REV 00

DATE April 2021

REPLACES D-EIMAH00105-15_00EN

Daikin Applied Europe S.p.A. – All rights reserved

This Installation, Use and Maintenance Manual is entrusted to users of the Professio­nal Units, for the training of the technicians in charge of installation and mainte­nance. The instructions contained in this manual are of a confidential technical na­ture and cannot be reproduced and/or disclosed, either completely or partially,
without a specific written authorization from the company.

It is explicitly forbidden for technicians and operators to divulge the information
contained and to use this manual for purposes other than those strictly related to
the correct installation and maintenance of the product.

Daikin Applied Europe cannot be held responsible or liable for damage caused by
the incorrect use of the documentation.

Installation 36

Summary

Important warnings 4

Warnings for the operator 5
Service 5
Purpose of the manual 5
Intended use of the machine 5
Safety regulations 6
What to do in case of accident? 8
Information ownership 8
Residual risks 9
Safety devices 10
General information on safety 11
Passive safety measures 12
Safety signs 13
Active safety measures 14
Components present in the air handling unit 14
Training 14
Optional 14

Machine characteristics 15

Fan section 15
Filtering section 18
Recuperators 22
Coils 23
Humidification section 23
Dampers 24
Silencers 25
UVC lamps 25

Receiving of the packages 28

Read the packaging symbols 28

Transport 29

Lifting 29
Lifting using hooks 30
Lifting using a pallet truck 32
Lifting non-palletised equipment 32

Step 1: Position the unit 38
Step 2: Section coupling procedure 39
Step 3: Fasten the units to the ground (optional)
Step 4: roof assembly procedure 45
Step 5: Make the connections 48
Step 6: Perform a trial run 74

43

Control instructions and
preparation for the start-up
of the unit and its
maintenance 75

Generalities 75

Water coil 76
Electric heaters 77
Indirect drive fans (belts and pulleys) 78
Humidifiers 82
Cross-flow and counter-flow
heat exchangers 83
Rotary heat exchangers 83

Rotary heat exchanger alignment/adjustment
Checking the unit safety devices 93
Use of the unit 94
Electrical connection for
Digital Plug & Play units 94
Digital board LED indicators 95
Pressure tap configuration (as from factory) 96

90

Maintenance 102

Safety precautions for maintenance 102
Ordinary maintenance 103
Extraordinary maintenance 106
Diagnostics 108
Service 108
Troubleshooting table 109
Repair log 113

Unpacking and verification of
integrity 33

After unpacking 33
Reading the serial number plate 34
Storage waiting for installation 35

1

The machines covered by this manual represent an excellent investment and deserve atten­tion and care both for a correct installation and for keeping them in good working condition.

Important warnings

The pictogram shows a situation of immediate danger or a dangerous situation that might cause injuries or death.

The pictogram shows that it is necessary to adopt suitable behaviour in order to avoid jeopardising staff safety and
cause damages to the equipment.

The pictogram shows particularly important technical information that should be taken into consideration by the
people installing or using the equipment.

IMPORTANT

Proper maintenance of the machinery is essential for its safety and reliability. All installation,
assembly, connections to the electrical network and ordinary/extraordinary maintenance
must be carried out only by technicians who comply with the legal requirements.

WARNING

Before installing the unit, read this manual carefully. If you do not clearly understand the in­structions in this manual, it is absolutely forbidden to operate the machine.

IMPORTANT

This manual describes the features and procedures common to the entire series of units.

All units are shipped with a general drawing, with dimensions and weights characteristic of
the specic machine.

THE SPECIFIC DRAWING MUST BE CONSIDERED AN INTEGRAL PART OF THIS MANUAL.

In case of discrepancy between this manual and the drawing, what is on the drawing will prevail.

4

Warnings for the operator

• BEFOREUSINGTHEUNITREADTHISUSERANDMAINTENANCEMANUAL

• THEOPERATORMUSTBEINSTRUCTEDANDTRAINEDTOUSETHEUNIT

• THEOPERATORMUSTCAREFULLYFOLLOWALLINSTRUCTIONS,SAFETYRULESANDLIMITSOF

USE OF THE UNIT.

Service

Before carrying out any repairs, it is advisable to contact authorized personnel, especially if it is necessary
to intervene for extraordinary maintenance.

Purpose of the manual

This manual was drawn up in order to provide operators and technicians responsible for the installa­tion and maintenance of the machine with the information and instructions that are vital and essential
to operate correctly and in safe conditions.
The purpose of this manual is to guide the installer and qualified operator in the installation, maintenance
and proper and safe use of the equipment. For this reason, it is mandatory for all personnel involved in

installation, maintenance and supervision of the machine to read this manual.

Contact the manufacturer if any points are unclear or difficult to understand.

This manual contains information regarding:

- Technical specifications of the machine.

- Instructions for transport, handling, installation and assembly;

- Tuning after installation and use;

- Information for instructing personnel authorised for its use.

- Maintenance and demolition;

All the information refers to any Professional unit. All the units are shipped together with a technical
schematic indicating the specific weight and size of the machine received. It must be considered an
integral part of this manual and therefore it must be kept with the utmost care in all its parts.
If the manual or drawing is lost, it is important to request a copy from the manufacturer, specifying the
unit’s serial number and date of purchase that can be found on the invoice.

Intended use of the machine

This appliance has the function of treating the air intended to condition civil and industrial environments.
Any other use is not in accordance with the intended use and therefore dangerous.
This range is designed to be used in NON-explosive environments.

If the machine is used in critical situations, by type of system or environmental context, the customer
must identify and adopt the technical and operational measures to avoid damage of any kind.

5

Safety regulations

Skills required for the installation of the machine

Installers must perform operations according to their professional qualifications: all activities not within one’s exper-

tise (i.e. electrical connections) must be carried out by specialised and qualified staff so as not to endanger one’s
safety and the safety of the other operators interacting with the machine.

Transport and equipment handling operator: authorised person with recognised expertise in using transport

and lifting equipment.

Technical installer: expert technician, sent or authorized by the manufacturer or its representative, with adequate

skills and training to install the machine.

Assistant: technician subject to care obligations while lifting and assembling the equipment. He must be suitably

trained and informed about the operations to perform and the safety plans of the site/installation location.

In this manual, the technician competent to carry out each operation is specified.

Skills required for the use and maintenance of the machine

Generic operator: AUTHORISED to run the machine using commands placed on the keypad of the electrical con-

trol panel. Performs only machine control operations, power on/off.

Maintenance mechanic (qualified): AUTHORISED to carry out maintenance, adjustments, replacement and re-

pair of mechanical parts. It must be a person competent in mechanical systems, therefore able to perform mechan­ical maintenance in a satisfactory and safe manner, must possess theoretical preparation and manual experience.
NOT AUTHORISED to work on electrical systems.

Manufacturer’s technician (qualified): AUTHORISED to perform complicated operations in every situation.

Operates in accordance with the user.

Maintenance electrician (qualified): AUTHORISED to perform service of an electric nature, adjustments, main-

tenance and electrical repairs. AUTHORISED to operate in the presence of an active electrical connection inside the
control panels and junction boxes. It must be a person competent in electronics and electrical engineering, there­fore able to work on electrical systems satisfactorily and safely, must possess theoretical knowledge and proven ex­perience. NOT AUTHORISED to work on mechanical systems.

Installers, users and maintenance staff for the machine must also:

- Be responsible and experienced adults without physical impairments, in perfect psychological and physical condition.

- Master the machine’s operating cycle, therefore participate in theoretical/practical training alongside an expert machine operator,
or alongside a technician of the manufacturer.

In this manual, the technician competent to carry out each operation is specified.

6

Read this manual carefully before machine installation and maintenance and keep it for any

further future consultation by the various operators. Do not remove, tear out or rewrite any
part of this manual.

All installation, assembly, electrical connections to the mains and ordinary/extraordinary mainte­nance must be performed only by qualied personnel authorised by the Retailer or Manu-
facturer after turning off the unit electrically and using personal protective equipment (i.e., gloves,
protective goggles, etc.), in compliance with the regulations in force in the country the equipment
is to be used in and the laws regarding the systems and safety in the workplace.

Installation, use or maintenance other than those specified in the manual may cause damage,

injury or death, invalidate the warranty and relieve the Manufacturer of any liability.

Use protective clothing and suitable equipment while handling or installing the equipment,

in order to prevent accidents and safeguard your own and other people’s safety. Individuals
not assigned to installation or maintenance are NOT allowed to stand or pass through the
work area while the machine is assembled.

Disconnect the equipment from the mains before installing or maintaining it.

Before installing the equipment, check that the systems comply with the legal provisions in

force in the country of use and meet the specifications on the serial number plate.

It is the responsibility of the user/installer to check the static and dynamic stability relative to the

installation and to arrange environments so that people who are not competent or author-

ised DO NOT have access to the machine or to its commands.

It is the responsibility of the user/installer to make sure that weather conditions do not affect the

safety of persons and property during installation, use and maintenance.

Make sure the air intake is not located near any exhausts, flue-gases or other contaminating el-

ements.

Do not install the equipment in places exposed to strong winds, salt air, open flames or temper-

atures exceeding 50°C (122°F) with indirect solar radiation.

After installation is complete, instruct the user on the correct use of the machine.

If the equipment does not work or functional or structural alterations are noted, disconnect it

from the mains and contact a service centre authorised by the Manufacturer or Retailer, with­out attempting to repair it on your own. For any replacements request the use of original spare
parts.

Unauthorised actions, tampering or modifications that do not follow the information provided

in this manual can cause damage, injuries or fatal accidents and void the warranty.

The serial number plate on the unit provides important technical information, essential in case of

machine maintenance or repairs. We recommend that you do not remove, damage or modify it.

In order to ensure correct and safe conditions of use, it is recommended to have the unit main-

tained and checked at least annually by a service centre authorised by the manufacturer or dealer.

Failure to follow these instructions may cause damage and injuries, even fatal, voids the

warranty and relieves the Manufacturer of any liability.

7

Information ownership

This Manual contains proprietary information. All rights reserved.

This manual may not be reproduced or photocopied, in whole or in part, without the Manufacturer’s pri­or written consent.

The use of this documentary material is allowed only to the customer to whom the manual has been sup­plied as a kit for the machine and only for the purposes of installation, use and maintenance of the ma­chine to which the manual refers.

The Manufacturer declares that the information contained in this manual is congruent with the technical
and safety specifications of the machine to which the manual refers.

The drawings, diagrams and technical data shown are updated to the date of publication of this docu­ment and are valid exclusively for the machine they accompanied.

The Manufacturer reserves the right to make changes or improvements to this documentary material
without notice.

The Manufacturer accepts no responsibility for direct or indirect damage to persons, things or pets result­ing from the use of this documentary material or the machine in conditions other than those provided for.

8

Residual risks

Despite having implemented and adopted all the safety measures indicated by applicable regulations,
some residual risks remain. In particular, in some operations of replacement, adjustment and tooling max­imum attention is always required in order to work in the best possible conditions.

List of operations with residual risks

Risks for qualified personnel (electrician and mechanic)

- Handling - during unloading and handling it is necessary to pay attention to all the steps listed in this manual regarding the
points of reference

- Installation - during installation it is necessary to pay attention to all the steps listed in this manual regarding the points of refer-
ence The installer must ensure the static and dynamic stability of the machine’s site of installation.

- Maintenance - during maintenance it is necessary to pay attention to all the steps listed in this manual, and in particular to high
temperatures that may be present in the heat transfer fluid lines to/from the unit.

- Cleaning - the machine must be cleaned only when it is switched off, by turning off the switch installed by the electrician and
the switch located on the unit itself. The key for interrupting the power supply must be kept by the operator until the end of the
cleaning operations. Internal cleaning of the machine must be carried out using the protections required by current regulations.
While the inside of the machine does not contain particular hazards, it is necessary to pay the utmost attention so that accidents
do not occur during cleaning. The heat exchange coils that have a potentially sharp finned pack must be cleaned using protec­tive glasses and gloves suitable for handling metals.

During adjustment, maintenance and cleaning there are residual risks of variable entity. Being opera­tions that must be performed with guards disabled, it is necessary to pay particular attention in order
to avoid damage to persons and things.

Always pay close attention when performing the operations specified above.

Remember that these operations must always be performed by authorised personnel. All work must be
completed in accordance with the legal provisions relating to work safety. Remember that the unit in
question is an integral part of a larger system that includes other components, depending on the final
characteristics of realisation and the mode of use. Therefore in the end it is the responsibility of the user
and assembler to assess the residual risks and their respective preventive measures.

For more information about the possible risks, please refer to the RAD (Risk Assessment Docu­ment) available from the manufacturer.

9

Safety devices

For each of the operations described in this manual, the means of protection that the personnel in
charge are required to use and the rules of conduct that allow to safeguard the safety of the operators
themselves are indicated.

Always pay attention to the safety symbols on the machine. It should only operate with the safety

devices engaged and with fixed or movable guards installed correctly and in the proper position.

If during installation, use or maintenance the safety devices have been temporarily removed or

disabled, the machine can be operated exclusively by the qualified technician who made this
change. It is mandatory to prevent other people’s access to the machine. When finished, re­store the devices to their proper status as soon as possible.

For installation, maintenance and demolition operations, the use of the following personal protec-

tive equipment is mandatory:

Suitable protective clothing:

Safety helmet

Safety footwear

Safety goggles

Cut-resistant gloves

10

For each of the operations described in this manual, the means of protection that the person-

nel in charge are required to use are indicated (possibly in addition to those that the personnel
is required to wear in the place of installation of the machine) together with the rules of conduct
that allow safeguarding the safety of the operators themselves.

General information on safety

Design criteria

The principles and concepts contained in the harmonized standards indicated in Table 2 were adopted
for the design of the machine.

ACTIVITY FREQUENCY

EN ISO 12100: 2010

EN ISO 13857: 2019

EN ISO 14120: 2015

IEC EN 60204-1: 2018

Safety of machinery - General principles for design -

Part 1: Basic terminology, methodology

Safety of machinery - Safety distances to prevent hazard

zones being reached by upper and lower limbs

Safety of machinery - General requirements for the

design and construction of fixed and movable guards

Safety of machines - Electrical equipment of machines -

Part 1: General requirements

Table 2 - Main harmonized standards used in the design of air handling units

Compliance with the relevant paragraphs of the aforementioned harmonized standards has made it
possible to eliminate or reduce risks in the best possible way, during both normal operation and adjust­ment and maintenance operations, throughout the life cycle of the machine.
The components used have been carefully chosen from those available on the market, the materials
making up the machine and the accessory tools do not constitute a risk to people’s health and integri­ty. All parts supplied by third parties are CE marked (when required) and comply with the relevant ref­erence directives. All the details have been strictly checked in compliance with the quality standards
prescribed by the regulations in force.
Furthermore, the necessary warning and protection measures against residual risks (see, in this regard,
the active passive safety measures described below) have been adopted for the machine.

11

Passive safety measures

Metal structure that encloses the individual parts of the machine

Panic handles with opening also from inside the unit

Metal mesh or protective casing to protect the fan unit
and the corresponding transmission components.

Safety signs on the external structure of the unit

Information signs

Fresh air right
62x62 mm

Exhaust
air
right
62x62 mm

Air supply
right
62x62 mm

Return air
right
62x62 mm

Cold water
inlet
62x62 mm

Fresh air
left
62x62 mm

Exhaust
air
left
62x62 mm

Air supply
left
62x62 mm

Return air
left
62x62 mm

Heat
recuperator
62x62 mm

Damper
62x62 mm

Drop
separator
62x62 mm

Fans
62x62 mm

Electric
coil
62x62 mm

Liquid
coolant
inlet
62x62 mm

Cold water
outlet
62x62 mm

Hot water
outlet
62x62 mm

Filter
62x62 mm

Heat
exchange
coil
62x62 mm

Moving
parts
62x62 mm

Condensate
drain
62x62 mm

Antifrost
62x62 mm

Daikin
310x70 mm

Unit label
102x102 mm

12

Hot water
inlet
62x62 mm

Humidification
62x62 mm

Vapour
coolant
outlet
62x62 mm

Silencer
62x62 mm

Eurovent
135x45 mm

Safety signs

Lifting

Safety

POSITIVE PRESSURE

SAFETY HANDLE

FIRE RISK

CLOGGED FILTERS

INFLAMMABLE

DANGER D’INCENDIE

FILTRES EMPOUSSIERES

INFLAMMABLES

PELIGRO DE INCENDIO
FILTROS COLMATADOS

INFLAMABLES

PERICOLO DI INCENDIO

FILTRI INTASATI

INFIAMMABILI

BRANDGEFAHR
VERSCHMUTZTE

FILTER ENTFLAMMBAR

handle
positive
pressure

AHATFIREDANGER

Fire
hazard

Remove IMMEDIATELY
the lms at receiving
the machine

Belt

20-45°

tensioning

AHABSTICKER0048

Roof film
removal

AHABSTICKER0057

Remove the film
from the panels

Risk of
brazing the
temperature
sensor

Grounding

Electric shock
hazard

Remove the lms within 4
mounth of receiving the

ORGANI IN

MOVIMENTO

MOVING

MACHINERY

BEWEGLICHE

CLEAR ELECTRIC SUPPLY

VOR ÖFFNEN DER TÜR

ANLAGE SPANNUNGSLOS

MOTORE

SOTTO TENSIONE

ELECTRIC

SUPPLY LIVE

MOTOR UNTER

TEILE

SPANNUNG

TOGLIERE CORRENTE

PRIMA DI APRIRE

BEFORE OPENING

SCHALTEN

machine

Electrical
hazard

AHATELECDANGER

AHABSTICKER0054

BEFORE USE
HEATWHEEL

Removal of heat
wheel blocks

OFF

0

before the unit
first start-up

Safety warnings on the packaging

The following warning labels are present on the packaging of the machine

1

2

OK!

CODICE

3

OK!

54

OK!

OK NONO OK NONO

OK!

OK!

max

ø 55 mm

OK!

min. 20 cm

OK!

ø 60 mm

OK!

ON

1

180 s

123

REMOVE SCREW

REMOVE BEFORE

INSTALLATION

Removing wooden
planks from the
ceiling

Danger of
running
fans

OPEN

CODICE

AHU load straps

AHU safe handling

13

Active safety measures

Emergency button positioned on the control panel.

Magnetic microswitches installed in correspondence with the access doors of the fan sections
on the machine (at the explicit request of the customer)

If the machine has an electric heat exchange battery, there is a thermostat capable of detecting
the temperature of the battery itself and a manual reset safety thermostat.

Double click doors in correspondence of the positive pressure sections.

Components present in the air handling unit

The machine is designed and built for air treatment. In general, no material present on the machine is
dangerous for the operators responsible for managing the machine itself. However, it is necessary to
pay attention to the handling operations of the filters, which could cause allergy or irritation to the op­erators.
The user of the machine must therefore provide adequate PPE (for example, goggles, masks, gloves or
protective clothing), independent from the supply of the machine itself, to the operators who work in
contact or within the range of action of the materials that generate hazards of the type indicated above.
Waste products resulting from normal maintenance on the machine must be disposed of by the pur­chaser of the machine in compliance with the regulations in force in the country of installation of the
machine. Disposal must be carried out in such a way as not to harm the environment, people and ani­mals, in compliance with the relevant legislative provisions.

Training

It is the responsibility of the machine buyer/user to provide adequate instruction and training to machine
operators.

Optional

In agreed cases, additional training may be provided through the one-on-one instruction of operators by
the Manufacturer’s technical staff.

14

2

The MACHINE is designed and built for air treatment and can have different configurations depend­ing on the type of treatment requested by the customer. In this sense, the MACHINE consists of sever­al sections, each of them with a specific function, which may or may not be present according to the
type of treatment requested.

The supporting structure consists of profiles made by aluminium alloy extrusion. The stainless steel fix­ing screws are concealed in the profile itself so as to have smooth surfaces on the inside. The panels of
the structure consist of two zinc-plated box press-folded sheets injected with polyurethane. Alternatively,
as an insulator, mineral wool can be used. Where necessary, along the panels, doors with locked handles
and/or portholes are installed to inspect the inside of the machine.

Find below the main sections of the machine.

Machine characteristics

Fan section

The standard construction involves the use of single or twin double inlet centrifugal fans. The customer
has the possibility to select the model, according to requirements. The available options are:

Double inlet centrifugal fans with backward curved or airfoil blades

The double inlet centrifugal fans belonging to this range have a steel impeller with backward curved
blades of the flat or airfoil type, welded and painted, inlet cone with patented index, trapezoidal cut and
low maintenance ball bearing. In particular, the augers are built with galvanized steel sheet and are sta­pled with the Pittsbourgh method, which ensures high quality, perfect seal and sturdiness. The inlet noz­zles are made of painted steel sheet and are fixed to the sides of the auger. A series of standard holes is
arranged on the sides in order to allow the fixing of the frames. The impellers are keyed to the shaft with
aluminium or steel hubs equipped with tab and tightening screw. All shafts are sized with a high safety
factor and are made of carbon steel, turned and ground. The shafts have a keyway at the impeller hub and
another at each end. All shafts are coated with protective paint. Finally, the fans must be fixed on a base
frame in order to avoid deformations caused by the tension of the belt.

Fan with flat backward blades

15

Fan with backward airfoil blades

Plug Fan

This range of fans consists of free centrifugal impellers (without housing).
There are impellers with backward curved flat blades or with backward curved airfoil blades. The impellers
are keyed with aluminium or steel hubs equipped with a keyway and tightening screws.
The impellers are coupled directly to the motor shaft, which is selected and sized, taking into account the
starting inertia, the rated power absorbed and the rotation speed of the fan at the working point.

16

EC Fan

These fans use electronically controlled motors, better known precisely as EC, capable of always work­ing at maximum efficiency and allowing considerable energy savings, compared to traditional asyn­chronous motors (i.e. in alternating current). This technology makes it possible to integrate an extreme­ly quiet and high-performance DC (direct current) motor on the AC (alternating current) fans, which
allows a very precise adjustment of the speed, to obtain the required air flow, reducing the absorbed
power. This simplifies the components necessary for these functions, compared to fans with tradition­al motors. The possibilities of controlling the fan speed are: 0 -10 V DC / 4-20 mA signal, PWM, or via the
MODBUS serial RS485 communication protocol

Main advantages of EC fans compared to conventional motors:

• Superior energy eciency

• Lower operating costs

• Low noise level

• Precise speed control and adjustment

• Superior aeraulic performance

• Electronic protection integrated in the motor

Accessories supplied with the fans

The control logics of the units involves the use of components designed to measure the pressure or air
flow. Depending on the customer’s selection, the following can be used:
differential pressure switches, Magnehelic, Minhielic, pressure transducers to control fan air flow rate or
pressure.

For safety reasons, it is also possible to select accessories, such as protection grids applied directly on
the impellers or on the section inspection and disconnecting switches connected directly to the mo­tor for any power outages.

17

Filtering section

Rigid bag filters

Rigid bag filters are made of wet-laid fibreglass, resistant to free moisture in the atmosphere. The mate­rial is manufactured with two layers: coarser fibres on the air inlet side and finer fibres on the outlet side.
The two layers are glued to the sides of the cells using urethane sealant.

The dual-density design allows dirt particles to be collected for the entire depth of the package, ex­ploiting the full filtering potential of the substrate and maximizing dust hold. Maximizing the ability to
retain dust extends filter life and minimizes operating costs.

The thermoplastic separators maintain a uniform spacing between the folds to allow optimal air flow
inside and through the filter. The separators also ensure a large effective medium area to minimize the
pressure drop.

The sides of the filter head and cell are made of high impact polystyrene (HIPS). The design, which en­closes a fixed media package, creates a robust filter that resists damage during shipping, handling and
operation, with a space-saving design that reduces transport, storage and handling costs. All filter com­ponents are completely incinerable (maximum operating temperature 70°C). The available filtration
levels comply with current European standards (ISO 16890).

18

Soft bag filters;

Soft bag filters consist of a galvanized steel frame and a synthetic material as the filter medium. The max­imum operating temperature is 70°C and they comply with the hygiene regulations in force.

Compact filters

These filters are used both as prefilters and as main filters.
The filter cell frames are made of high impact polystyrene. All filter components are completely inciner­able and non-corrosive (maximum operating temperature equal to 70°C). The hot melt separators main­tain a uniform spacing between each curve to allow for optimal air circulation inside and through the fil­ter. This filter is also available with fluids with bacteriostatic effect. The filter complies with the hygiene
regulations in force (ISO 16890).

19

Activated carbon filters

These filters are used for the deodorization and absorption of pollutants present in the air in civil and in­dustrial air conditioning systems, where the control of gaseous pollutants is required. Activated carbon fil­ters use micro-granules of activated mineral carbon. There are different types of treated granules with ad­ditives, suitable for the adsorption of specific gaseous substances. The supporting structure consists of a
galvanized or stainless steel support plate, equipped with holes for the quick installation of the cartridge.
The cylindrical cartridges are refillable, with expanded steel mesh and neoprene gasket on the connect­ing edge.

HEPA filters

The filter medium used for these filters is folded water repellent fibreglass with constant calibration spac­ing. The separation of the layers takes place through continuous thermoplastic threads. The frame used
is in galvanized steel, complete with side handles. A polyurethane sealant and one-piece gasket are also
used to ensure a seal.

20

Pre-filters for plate and rotary heat exchangers

The filter medium used for these filters is folded water repellent fibreglass with constant calibration spac­ing. The separation of the layers takes place through continuous thermoplastic threads. The frame used
is in galvanized steel, complete with side handles. A polyurethane sealant and one-piece gasket are also
used to ensure a seal.

Accessories for filters

At the customer’s request, it is possible to add accessory components to measure the clogging of the filter
cells. For this purpose, the following can be selected: differential, Magnehelic, Minihelic pressure switches.

Other optional accessories are: the lamps (which can also be wired directly), the inspection doors
equipped with polycarbonate portholes.

21

Recuperators

The Professional units can be equipped with static or rotary heat recuperators, thanks to which consider­able energy savings are obtained.

Static plate heat exchangers

In static recuperators, the self-spaced thick aluminium sheets form the exchange pack. These sheets are
suitably sealed to each other at the ends in order not to allow contamination of the replacement air by
the exhaust air. The casing is made of galvanized sheet metal or aluminium. Usually plate heat recuper­ators are equipped with a bypass damper that excludes part or all of the external air from the recovery
treatment.

Rotary heat exchangers

The rotary heat exchangers are essentially made up of a rotating exchange pack, formed by thin sheets
of pleated aluminium, enclosed in a frame also made of aluminium, galvanized steel or aluzinc. The cas­ing panels are easily removable; this allows easy maintenance and cleaning. The rotor can be equipped
with a regulator that allows to vary the number of RPM of the rotor and therefore the amount of heat
exchanged.

Static run-around recuperators

The run-around recuperators consist of two coils hydraulically connected in which the heat carrier fluid is
water or glycol water, which transports the heat from the return air flow to the supply air flow or vice versa

Rotary recuperator

Static plate recuperator

22

Static run-around recuperator

Coils

The heat exchanger coils are used for heating the air with hot or superheated water or steam, or for cool­ing fed with chilled water, brine solutions, water and glycol mixtures or direct expansion. Alternatively,
electric batteries can also be used where the air is heated by passing close to electrical resistances.

Water and direct expansion coils

The water and direct expansion coils can be equipped with:

- Drainage tank in SS430, SS304 or SS316 stainless steel

- Two or three-way modulating valves

- Frost protection thermostat

- Plastic siphon DN40-32

Electric heaters

Electric heaters can be equipped with a differential pressure switch hydraulically connected to the fan,
for the battery activation logic, based on the flow of air that hits the battery.

Humidification section

The air processed by the AHU can be humidified by means of:

Steam isothermal humidification with distributors for network steam or
self-produced with steam producers

The steam can be produced centrally with indirect steam generators, which produce sterile steam, trans­ported with stainless steel pipes to the network steam distributors installed on board the unit.
The steam can be self-produced with steam producers with resistances or immersed electrodes. The for­mer brings the water contained in the producer to boil, thanks to the heat provided by the resistances
immersed in the water, while the operation of immersed electrode humidifiers is based on a very simple
physical principle. Since common drinking water contains a certain amount of dissolved mineral salts, and
is therefore slightly conductive, by applying a voltage to metal electrodes immersed in it, an electric cur­rent is obtained which heats it (Joule effect) until it boils, producing steam.
The amount of steam produced is proportional to the electric current, which is proportional to the wa­ter level.
The electric current is measured by an amperometric transformer.
Controlling the water level by means of the filling solenoid valve and the evaporation itself, the current
and consequently, the production of steam is modulated.
Due to evaporation, the water level decreases and therefore the cylinder must be replenished.
Since the steam does not carry mineral salts, the water increases its salt concentration and therefore its
conductivity, and is automatically and periodically diluted, discharging a part of it by means of the sole­noid valve or the drain pump and replacing it with new water.

23

Compared to the humidifiers with immersed heaters or gas, to which they are complementary, the hu­midifiers with immersed electrodes:

• work with drinking water (not completely demineralized or softened);

• require periodic replacement (or cleaning) of the cylinder;

• have a modulation suitable for comfort or industrial applications without extreme requirements.

Adiabatic water humidifier

The operation of the evaporating pack or of the nozzle system (washer or humidifier at low and high
pressure) occurs through a natural process: the exchange of energy between water and air.

The pumping system placed on top of the pack uniformly wets the surface of the pack itself, while the sys­tems with nozzles pulverize the water into tiny droplets.
When the water flows inside the humidifying pack or is nebulized, the energy required for the evaporation
of the water is taken from the air that passes through the humidification system.
The air that passes through the pack or the humidification chamber provides the heat necessary for the
evaporation process of the water itself.

For proper operation of the humidification system, the air must be suitably pre-heated, as in contact with
the pack or with the nebulized water it cools in proportion to the increase in specific humidity.

Dampers

The dampers consist of a frame and a series of galvanized steel or extruded aluminium blades. The damp­er control can be manual or motorized.

For the dampers there may be microswitches, positioned on the dampers themselves, capable of com­municating the correct opening of these components before starting the machine. Alternatively, if
there are motorized dampers on the machine, a timer allows the automatic stop (start) of the fan when
the dampers are closed (opened).

According to the type of damper (with manual opening, motorized on/off, modulating), there are dif­ferent types of actuators, which are shown in the figure below:

24

Silencers

Silencers represent the standard solution for reducing the noise generated in the systems along the air
ducts. The models used in the units are rectangular in shape.

Each splitter is made up of a double mat of non-combustible mineral wool, covered with a film of anti-ero­sion fibreglass.

The performance of the silencers is certified and compliant with the hygiene regulations in force. The op­tion with removable silencers is available.

UVC lamps

The emission of UVC lamps is used to inhibit the growth of fungi, bacteria, etc., in particular on the sur­faces of the cooling coils, which, being wet, can create favourable conditions for the growth and prolif­eration of these pathogenic elements.

The presence of these lamps in the air handling units of Daikin Applied Europe S.p.A. brings the following
benefits to the system:

• Reduces the energy costs of air conditioning and ventilation systems, as it keeps the exchange surfaces

clean, leaving the heat transfer unchanged.

• The use of UVC germicidal rays is eective as an inactivation method for viruses, bacteria and moulds.

• Allows to reduce or eliminate expensive cleaning and sanitizing programs, through the use of harm-

ful substances, chemicals and disinfectants, programs that must also be implemented for the disin­fection of the coils, condensate collection trays, plenums and ducts.

• Does not produce appreciable ozone or secondary contaminants.

• Improves the indoor air quality of buildings (IAQ).

The UV lamps section is equipped with an electrical panel. The wiring diagram is delivered together with
the unit and shown below, dedicated both to the power supply of the lamps and to the connection of
the auxiliary safety components (inspection door microswitch in the UV lamp section and pressure switch
with flow switch function).

The intervention of these elements causes the immediate shutdown of the lamps in the event of the
supply fan being stopped or in the event of accidental opening of the inspection door of the UV lamp
section.

25

It is the responsibility of those who carry out the first start -up to fill in the fields on the label applied to
the UV lamp section below:

Before installing the lamps, check that the support structure is intact and that it has not been damaged
during transport.

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Wiring diagram for the connection of UV lamps (panel supplied and wired)

Key:

SG = general disconnecting switch (16 A)
Q1 = Differential circuit breaker (16 A - 0.03 A)
K1 = lamp ignition contact relay
DPS = Differential pressure switch with flow switch function
MSD = Microswitch for inspection of the UV lamp section.

The lamps must be replaced after 9,000 hours of operation and the replacement must be recorded on
the label shown above.

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3

The means and method of transport must be chosen by the transport operator according to the type, weight and size of the
machine. If necessary, draw up a “safety plan” to guarantee the safety of the people directly involved.

Receiving of the packages

Handle the equipment following the Manufacturer’s instructions on the packaging and in this manual.
Always use personal protective equipment.

At the moment of receiving the machine check the integrity of
the packaging and the amount of parcels sent:

A) There is visible damage/one or more packages is missing:
do not install, but promptly notify the Manufacturer and the car­rier that made the delivery.
B) There is NO visible damage: move the machine to the site of in­stallation.

N.B.: The packaging is guaranteed for a period of 6 months from
the date of manufacture of the same (indicative label placed on
the packaging). The company will not be held responsible for any
damage due to oxidation or rust formation on any part or compo­nent of the unit, after this period. The 6-month warranty is in any
case subject to the perfect state of conservation of the wrapping
constituting the packaging.

Read the packaging symbols

Externally, the packaging bears all the information necessary to transport the equipment safely: compli­ance with these instructions ensures operators are safe and prevents any damages to the equipment.

The figure shows the symbols applied to the packaging:

Indicates top and bottom

Indicates that the package must be stored in a dry place because its contents are sensitive
to humidity

Shows that the package must be handled with care because its contents are fragile

Shows the package’s centre of gravity

Shows the position of the cables so that the package can be lifted correctly

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Shows the maximum weight that can be placed on top of the package

4

During the lifting and transport phases there are risks associated with:

Transport

Operations on the machine by unqualified, untrained, uninformed or improperly equipped per­sonnel.

Incorrect choice or incorrect use of the means of transport and handling (for example, crane,
hoist, forklift truck) of the machine components;

crushing of handling operators;

loss of load stability during transport and handling operations;

projection of moving parts of the machine that cannot be removed or fixed properly;

collisions of parts or components of the machine with people or objects due to unexpected move­ments of the machine itself or incorrect behaviour by the operators responsible for the operation;

impact or fall of machine components, with damage to the machine itself and its protections;

unhealthy positions or excessive efforts for the operators assigned to transport and handling the
machine components.

Packages can be handled with a lifting hook or pallet truck of suitable capacity. The choice of the
most suitable means and method lies with the operator.

The operating area must be perfectly free from objects or people not involved in the transport.

If the unit is moved using hooks, use some spreader bars between the lifting cables to prevent
damage to the unit and ensure no excessive stress is placed on the side panels.

Lifting

Never use two lifting devices at the same time.

Never stand under suspended loads.

If steel ropes are used, always apply the end eye to the lifting hook.

When using steel ropes, be careful not to create sharp bends, i.e. with a radius of curvature small-

er than that of the rope end eyelets.

Use ropes of adequate length, so that the angle between the ropes and the horizontal plane is
always >= 75° (angle between the ropes <= 30°).

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If lifting eyebolts are provided, the end shackles of the ropes must be screwed by hand and
turned in their direction of work.

Lifting using hooks

Use hooks of adequate capacity and material for the weight of the packaging to be lifted. Make

sure that the safety latch is in the correct position while lifting.

DO NOT handle the equipment if the field of vision is poor or in the presence of obstacles

along the way (e.g. electrical cables, lintels, etc.) When the loads are lifted, the range of action
of the lifting equipment must remain free of persons.

Use perfectly serviceable hooks, chains or steel cables of adequate capacity and material, with-

out any joints or extensions. To guarantee efficiency, carry out periodic checks.

Make sure the ground the lifting equipment rests on is stable and not subject to subsidence.

Check the flatness of the ground. Do not move the lifting device with the machine suspended
in the air.

Lifting with ropes Lifting with eyebolts

OK!

15°

15°

OK!

15°

15°

Lifting with bracket + hook

30