etamax series

Etamax SeriesAir handling unit for all fresh air with high energy effi ciency.

Air fl ow rates from 4.000 to 25.000 m /h

0510-

6180825-r

ev.0

SELECTION MANUAL

FAST S.p.A.

3

Index Engli

sh

General norms 4

Introduction 5

Advantages of a high efficiency air handling unit 6

- Advantages 6

- Efficiency in the thermic and cooling energy production 7

Etamax: components disposition 9

Main components 10

Lyfe Cycle Cost 11

- Results of the LCC simulation between traditional and innovative solution 12

Environmental impact 13

Unit description 14

Main components description 15

Accessories 16

Accessories compatibility table 17

Operating schemes Etamax Std 18

Operating schemes Etamax Dry 19

Operating schemes Etamax Eco 20

Nominal technical data 22

Characteristics of the pump modul 23

Operating limits 24

Water coils performance table 26

Sound data 27

Dimensions 28

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The present manual is an

integral part of the

documentation enclosed

with the machine.

It must be conserved

for future reference

and must accompany the machine

throughout its workinglife.

The manual defines the purpose to

which the machine was built and

establishes the correct installation

and use limits.

• All use, installation and main-

tenance instructions of the unit

are described in this manual

as wel l as the main acc i -

dent prevent ion s tandards .

• Read carefully and fully all infor-

mation contained in this manual

before the installation, star-

ting, use, maintenance and cle-

aning of the unit. Pay parti-

cular attention to the use regu-

lations that are accompanied by

“DANGER” or “WARNING”, becau-

se if not observed, they could

cause damage to the machi-

ne and/or persons and property.

• For irregularities not contempla-

ted by this manual, please con-

sult the local After Sales Service.

• FAST S.p.A. decline any respon-

sibility for any damage due to

the improper use of the machi-

ne, and to a partial or super-

ficial reading of the informa-

tion contained in this manual.

• Installation and maintenance must

be carried out by trained and qua-

lified personnel, having the requi-

rements laid down by law 46/90

and/or DPR 380/2001 for electric/

electronic and air conditioning

installations, with consequent regi-

stration at the local CHAMBER of

COMMERCE. Otherwise FAST S.p.A.

decline all responsibility regar-

ding the safety of the product.

THE MANUFACTURER DECLINES ANY

RESPONSIBILITY FOR DAMAGE TO

PROPERTY, PERSONS OR ANIMALS

CAUSED BY THE NON OBSERVANCE

O F T H E I N D I C AT I O N S A N D

REGULATIONS CONTAINED IN THE

PRESENT MANUAL.

Even though a suitable risk analysis was

carried out during the design of the HRR

unit, pay ATTENTION to the pictograms on

the machine that make the reading of the

manual easier catching the readers atten-

tion concerning risks that can’t be avoided

or sufficiently limited with the adoption

of protection means and measures.

GENERAL DANGER SIGNS

Carefully observe all indications

at the side of the pictogram.

The non observance of the indications

could caus hazardous conditions with pos-

sible injury to the operator and to the

user in general.

VOLTAGE DANGER SIGN

Carefully observe all indications

at the side of the pictogram.

The signs indicate components on the unit

or, in the present manual, identify areas

that could generat risks of an electrical

nature.

GENERAL WARNING SIGNS

Carefully observe all indi-

ca-t ions to the s ide of

the picto-gram that limit

some actions in order to ensu-

re greater safety for the operator.

I T I S F O R B I D D E N TO

CLEAN, O I L , GREASE ,

repair or adjust moving

e l e m e n t s m a n u a l l y.

INFLAMMABLE MATERIAL

MAIN GUARANTEE

CONDITIONS

• The guarantee does not include

payment for damages due to incorrect

installation by the installer.

• The guarantee does not include

payment for damages due to the

improper use of the unit by the user.

• The manufacture is not responsible

for injuries to the installer or user,

caused by incorrect installation or

improper use of the unit.

The guarantee is not valid if:

• the services and repairs have been

carried out by unauthorised personnel

or companies;

• the unit has been previously repai-

red or modified with non-original

parts;

• the unit has not been suitably

maintained;

• the instructions given in this

manual have not been observed;

• unauthorised modifications have

been made.

Note:the manufacturer reserves the

right to carry out modifications at any

time dee-med necessary to improve

its product, and is not obliged to

apply the said modifica-tions to pre-

viously manufactured machi-nes that

have already been delivered or are

being constructed.The general con-

ditions are in any case subject to the

general sale conditions foreseen on

the stipulation of the contract.

� � � � � � � � � � � � %

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In consideration of the recent legislative dispositions, concerning the reduction of the needed energy load for buildings,

together with the obvious necessity to provide for an adequate thermal insulation of the same, it becomes important to

analyse and propose innovative solutions having the aim of containing the energy consumption of the air-conditioning

systems.

In particular, the buildings of the tertiary sector are usually identified as places in which it is necessary to maintain an ele-

vate thermo-hygrometric comfort all year long (structures such as hotels, hospitals, banks, offices etc.).

This basically means that the air-conditioning installations serving these buildings must be capable of providing such tem-

perature, humidity level, air velocity, concentration of polluting agents, noise levels so as to limit the discomfort which the

users may perceive.

It is worthwhile noticing that this type of ambience are often very crowded, thus requiring frequent exchanges of the inside

air. Besides, the need to breath clean air inside the rooms is at the base of our everyday well-being, despite the pollution

often to be found in the external air might make it impossible to just inject fresh air into the room to perform this cleaning

operation.

The energy characteristics of the air-conditioning installations, to serve the buildings of the tertiary sector, must therefore

not modify or alter significantly the energy requirements of the whole building itself (of which the air-conditioning system is

an intregral part).

All innovative solutions which are directed to limit the air-conditioning systems consumptions which have to perform the fil-

tration and exchange air, the heating and the cooling should be part of the initial designing part of the building/system.

The solution proposed by Fast in order to satisfy the requirements of primary air handling with contained energy costs is one

innovative unit with high efficiency: Etamax.

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The air handling unit for primary air, Etamax series, has been designed and optimised in all its components in

order to reduce to the minimum the energy consumptions during operation.

The twin plate heat recovery system, static and active associated with the innovative adiabatic cooling system,

allows to bring the air to the desidered room conditions with the minimum energy consumption.

The Etamax unit represents therefore the Fast solution to the requirements of air renewal, air purification and

energy saving.

1. THE ADVANTAGES

1) ETAMAX REDUCES THE ELECTRIC CONSUMPTIONS

In the Etamax unit a series of devices are provided for, in order to reduce the energy consumption to the mini-

mum:

- Use of EFF1 class motors for the fans.

- Backward-curved blade fans with high efficiency.

- Use of refrigerant gas R410A.

- Compressor equipped with inverter.

- Use of double cross-flow plate heat recovery unit.

- Use of adiabatic cooling which increases the performances of the heat recovery in summer mode.

- Standard by-pass damper for the free-cooling.

- Control logic with optimised management of the consumptions.

- Inverters on the fan motors (Optional).

- Direct-driven plug-fans with electronically-controlled motors (Optional).

2) ETAMAX REDUCES THE ENVIRONMENTAL IMPACT

The use of the refrigerant gas R410A grants the operation of the cooling circuit in an efficient and reliable way,

in total respect to the environment.

The TEWI index (Total Equivalent Warming Impact) represents the parameter of the refrigerant emissions during

the life cycle of the unit, and of the indirect ones due to the emissions of CO2 for the production of energy.

By using this refrigerant the TEWI index is one of the lowest currently available, when comparing with other

refrigerants in the market.

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- The introduction of the inverter for the control of the fans contributes not only to reduce the energy

consumption of the whole unit, but also to reduce the noise level.

- The panels have 50mm thickness with hot-injected polyurethane insulation (or with rockwool as

optional) allow to effectively insulate the noise sources present inside the unit.

4) EASY INSTALLATION

- Unit supplied ready to use (plug and play) since it is:

- complete with control board.

- complete with actuators, sensors and programmable controller.

2. EFFICIENCY IN THE PRODUCTION OF HEATING AND COOLING ENERGY

1) RECOVERY OF ENERGY FROM THE EXHAUST AIR

The performances of the static heat recovery unit are increased in summer by the adoption of three nozzles

ramps for the adiabatic cooling of the exhaust air flow, supplied by a high pressure pump.

In particular, two of the three ramps, placed before the heat recuperators, lower the exhaust air flow tem-

perature until the correspondent wet bulb temperature is reached, thus increasing the temperature differen-

ce between the two air flows and therefore the efficiency of the plate heat recovery units. The third ramp is

positioned before the integrated refrigerant circuit coil in the exhaust airflow (which, in summer mode, has the

function of condenser). The function is to decrease the condensing temperature of the refrigerant circuit during

summer operation.

2) COMPRESSOR WITH INVERTER

The reversible refrigerant circuit in heat pump, operating with refrigerant R410A, is equipped with tandem

scroll compressors, one of which is operated with a frequency inverter and an electronic thermostatic valve.

Considering that for most of the time the unit is not requested to supply its maximum total capacity, this solu-

tion allows to modulate the capacity in combinatin with the requested load, this reducing the energy consum-

ption and granting, at the same time, the necessary steady supply temperature, typical of primary air installa-

tions.

The fresh air flow receives a pre-treatment inside the two plate

heat recovery units (placed in series) exchanging the energy with

the exhaust air flow.

The external air is therefore pre-heated in winter or pre-cooled

in summer and then passes through the heat exchanger coil of the

refrigerant circuit (evaporating in summer) which brings along the

necessary thermal contribution.

The winter treatment of the fresh air is then completed by the

adiabatic humidification with high pressure nozzles.

Exhaust air

Fresh air

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The fan sections are equipped with centrigula fans with backward-curved blades, with high efficiency, coupled

with motors with energy efficiency class EFF1.

Within the life cycle of an electric motor, up to 98% of the cost is generally imputable to the electrical energy,

and barely from 0,3% to 1,3% are destined to its maintenance and purchase.

The choice of a high efficiency motor permits to obtain in time such energetic savings as to count up to several

percentage points.

The motors may also be equipped with speed inverter (optional) for the rotation control, or in alternative the

unit may be supplied with electronic-controlled direct-driven plug fans. This latter solution allows to eliminate

the losses due to the belt-pulley transmission type, granting at the same stime the automatic regulation of the

air flow.

4) OPTIMISED CONSUMPTION MANAGEMENT

The Etamax air-handling unit is supplied ready to use (plug & play): all the devices are mounted on board and

the unit is equipped with a complete control board and microprocessor to control and optimise all its functions.

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Efficiency of 4-poles electric motors

M N M OP M N M OQ M N M OR M N M OS M N M OT M M N M O U V W X Y Z [W \ W ] ] X Z ^ [ _ ` ab [ V c ] W V d Z e V W f g h ai ^ j c Z k ] e l g h aDistribution of motor costs within its life cycle

Electricalenergy

Maintenance

Purchase

Power

Eff

icie

ncy

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The “heart” of the unit is a single section made up of:

-Heat recovery system with double plate heat recuperators with by-pass damper for the free-cooling

management.

- Active heat recovery system constituted by a refrigerant circuit in heat pump operating with R410A

and at least one component equipped with frequency inverter.

- Adiabatic cooling with three nozzles ramps supplied by a high-pressure pumping station.

- Humidifcation system constituted by three nozzles ramps, in the supply air flow, supplied by the same

high pressure pumping station used for the adiabatic cooling.

- Gas re-heating coil (standard in the Dry version) or water re-heating coil (optional for the Std configu-

tion and standard for Eco version).

- Complete electrical control board mounted;

A Exhaust air intake

B Supply fresh air D Fresh air intake

C Exhaust air outlet

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Main

com

ponents

External air

Supply

Exhaust

Cooling circuit with

compressor equipped

with inverter Double plate recuperator

By-pass damperPump modul

External air

filter

Heating exchange

coil (cooling circuit)Exhaust fan

Supply fan

1

1

1

1 Adiabatic cooling ramps

2 Dehumidification ramps

2

2 2

Available space for the hot gas

re-heating coil house (standard in the

Dry version)

Drop eliminator

NB. Plug-Fan are optional.

Heating exchange

coil (cooling

circuit)

� � � � � � � � � � � � n n

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he method for analysing the Life Cycle Costing (LCC) concerns the estimate of the costs, in terms of money, of

all the useful life phases of the unit, that is manufacturing, operation and maintenance.

According to the norm EN 13779 such parameter is calculated as the sum of the initial investment cost and the

updated value of all operation and manitenance costs:

LCC = I + fpv

( Co + Cm)

where:

I = value of the initial investment

fpv

= actualisation factor defined as fpv=1-1+ ri

-n

ri

where n is the length in years, ri is the interest tax expressed in function of the financial tax rate r and of the

inflation rate i:

Co = annual cost of the energy consumption

Cm = annual maintenance cost

In general, the LCC analysis for one air-andling unit shows how the initial investment cost weights as only 15%

of the global cost for the whole life cycle of the unit; therefore the remaining 80% is imputable to energy costs

deriving from the usage of such unit, and marginally from maintenance costs (5%).

It becomes therefore indispensable to choose units with very low nergy consumptions in order to reach an

effective energetc and economic saving. The Etamax unit has this primary target.

ri= ( r – i )

( 1 + i )

Maintenance

Investment

Energy

� � � � � � � � � � � � n p

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In order to evaluate the concrete convenience in using the innovative solution for primary air handling (Etamax)

as opposed to a traditional solution (AHU with plate heat recovery unit with 50% winter efficiency and a sepa-

rate heat pump unit), a detailed simulation of the Life Cycle Cost has been carried out, for both alternatives

in the climatic conditions of the areas of Padova (Veneto, North-East), Bari (Apulia, South) and Catania (Sicily,

island) with reference to three different type of buildings of the tertiary sector (hotel, shopping centre, offi-

ces).

The following hypotheses have been made for the aim of performing this analysis:

• annual operative cost: cost for consumed electrci energy (estimated price 0,15 €/kWh);

• annual maintenance cost: 4% of the initial investment value;

• length of the life cycle: 15 years;

• market interest tax rate: 5%;

• real inflation tax rate: 3,3% (average data in 2008);

• real interest tax rate: 1,6%;

• actualisation factor: 13,2.

• hotel: 24 hours of operation per day, 365 days a year.

• shopping centre: 11 hours of operation per day, 303 days a year.

• offices: 8 hours of operation per day, 251 days a year.

The LCC analysis for the two solutions is indicated in the following diagram. It must be considered that the

installation cost for the innovative solution is reduced, since no hydraulic lines are necessary for the connection

between the air-handling unit and the heat pump, besides the installation takes a shorter time since only one

unit has to be commissioned, reducing also the labour costs.

The results of the LCC analysis clearly show how the innovative solution allows to have an effective and impor-

tant economic saving within the life of the unit; such reduction is even more visible when applied to a hotel

structure, in that the continuous operation permits the maximisation of the energy saving and of the costs.

For brevity’s aim, only the results of the Padova experiment are indicated. Analogue results have however been

reached also in the other studied areas.

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rs r r r r� r r r r r� s r r r rq r r r r rq s r r r rt r r r r rt s r r r ru r r r r ru s r r r r

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v w x y z w x { w | } y ~ v � � � ~ v w � {

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� � � � � � � � � � � � � � �Life cycle cost comparison City: Padua

Offices Shopping centres Hotel

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� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � ! " # $ " ! �Environmental Impact

The term Total Equivalent Warming Impact, o simply TEWI, is rapidly becoming the reference when evaluating

the total impact of any refrigeration system on the global hot-house effect.

According to the norm EN 13779 the TEWI parameter represents the sum of the total emissions due to both the

refrigerant leakages (direct, chemical) and the production of gas as consequence of the production of energy,

necessary for the functioning of water chillers (indirect, energetic).

This parameter is defined as:

TEWI = Xn x GWP

n +

co2 x L x E

where :

Xn is the refrigerant fluid mass released in the atmosphere, expressed in kg.

GWPn is the potential hot-house effect (Global Warming Potential) of the refrigerant considered.

co2

is the mass of CO2 released for each produced energy unit (for Italy it is 0.47 kg CO

2/kWh

e, as per ENEL data

from 2006).

L is the life cycle length for the system, expressed in years.

E is the electric energy consumed in the unit of time, expressed in kWh/year.

The first term represents the direct hot-house effect, consequent to the emission of refrigerant in the atmo-

sphere, whereas the second term represents the indirect hot-house effect due to the consumption of electric

energy in the life cycle of the unit; the indirect effect, rather then the indirect one, is dominant for the heat

pump units and, in general, for the water chillers.

The simulation has been carried out with the same criteria used in the previous page and, for simplicity, we will

only show the results of the hotel analysis.

From the results, the Etamax solution shows a TEWI index inferior by 40% to the traditional solution, which can

be interpreted as a reduction in the emissions to the atmosphere of over 570 equivalent tons of CO2; the envi-

ronmental benefit offered by the innovative solution is more than evident.

NB. The results are only indicative.

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¹ º » ¼ ½ » ¾ ¿ À Á Â Ã Ä Å ¾Æ ¾ ½ Ç Á » È É ¿ Ê Ç º ¾ Ë Ç - 40%

TEWI Comparison Building: Hotel

City: Padua

Indirect effect Direct effect

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Use fields

The Etamax unit is destined to han-

dle primary air of the air conditio-

ning systems. The aim of the unit is

that to inject renewal air in room

under neutral conditions.

The load of the rooms to be cli-

matised (due to building thermal

losses) has to be compensated with

other air conditioning systems as

Etamax works on the ventilation

load of the external air only.

Versions

These units are available in 3 diffe-

rent versions:

- EtaMax Standard (Std)

- EtaMax Eco

- EtaMax Dry

Etamax Std is the version which

uses the double heat recovery

static (through 2 cross-flow heat

recovery units) und activ system

(reversible heat pump integrated).

3 ramp nozzles are used for the

adiabatic cooling of the exhaust air

flow and 3 ramp nozzles used for

the dehumidification.

In the Eco version is added a dam-

per for the air recirculation which

allows both in the winter operation

and summer operation (all recir-

culation), to quickly reach the set-

point (in this case a water coil is

necessary).

The finally Dry version, in addition

to the Std version, is equipped with

a hot gas re-heating coil.

Thanks to this configuration it is

possible to inject air in the room

under conditions which allow a

match with radiant floor heating

systems during summer operation

too.

Sizes

5 sizes for each version are availa-

ble according to the air flow desi-

red.

Regulation

The elctronic regulation on the unit

is able to work following the moda-

lities as follows:

1° modality

The regulation controls the tempe-

rature and the humidity on exhaust

(room).

2° modality

The regulation controls the tempe-

rature and the dehumidification on

supply. The unit has been dimen-

sioned to grant the following con-

ditions:

• 20 °C in winter.

• 24 °C in summer.

The relative humidity varies betwe-

en nominal values between 40 and

60%.

The unit is equipped with:

• ready to use (complete with

the material listed bevor);

• remote panel to 150 mt;

• chance of connection according

to the modbus protocol.

The season change (summer/winter)

is manual.

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BEARING FRAME

The bearing frame is made of alu-

minium profiles UNI 6060 with

rounded geometry corners, gran-

ting easy cleaning and avoid dirt

bild-up. The profiles are connected

through nylon-reinforced corners

with glass fibre.

The casing is made of sandwich

panels, 50mm thick, fixed to the

frame with exclusive locking profi-

les.

This fixing system allows for a uni-

form pressure between panel and

frame, granting a premium seal to

air (class B – EN 1886) and water

leakages.

Panels are made from external

pre-painted galvanised steel sheet,

insulated with injected hot polyu-

rethan (density 42 Kg/m3) and

internal galvanised steel sheet.

On request can be made different

materials panels for sheets and

mineral wool (density 40 kg/m3 or

100 kg/m3) as insulation.

It is recommended to verify the

feasibility and the available alter-

natives with the Fast technical

department.

BASAMENT

The continuous basament for all

sizes is made of galvanised steel

sheet.

MODULATING BY-PASS DAMPER

It is housed in the exhaust line to

allow for the free-cooling option.

The damper is made in aluminium

with airfoil bladesand is control-

led by a modulating actuator. The

accurate manufacturing allows for

minimized air leakages.

FANS

Centrifugal fans are with double

inlet, backward-curved blades, and

high efficiency both on supply and

exhaust. Electric motors are only of

high efficient (class EFF1).

Frequency inverters for the con-

tinuous control of the air volume

both on supply and on exhaust

(optional) are provided for.

Upon request, direct coupled plug-

fans with very elevate efficiency

are also available.

FILTERS

Several types of filters for EtaMax

units are available:

-Pre-filters (standard on supply and

exhaust)

-Bag filters

They are used to satisfy the dif-

ferent filtration requirements and

grant the compliance to the laws in

force, concerning the air quality. A

pressure switch for the filters clog-

ging is standard.

For futher informations please con-

tact the Fast technical department.

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In the EtaMax units a double heat

recovery system is included:

- Static heat recovery section

- Active heat recovery section

STATIC HEAT RECOVERY SECTION:

The static heat recovery system is

constituted with a crossflow heat

recovery unit,made of aluminium,

with high efficiency.

It is also supplied with an anti-fre-

eze sensor which, if the achieved

temperature on the recovery unit

section decreases under the set-

point, it switches off the supply

fan until the temperature doesn’t

reach a specific point (event in

which the inverter is not included).

In the event that the inverter is

included the supply fan flow is

reduced by 30% and if it is not suf-

ficient, the supply fan switches off

it.

ACTIVE HEAT RECOVERY SECTION:

The active heat recovery section

is constituted by a cooling circuit

integrated in heat pump.

Tandem scroll compressors (single

for sizes 040 and 060) are equipped

with anti-vibration dampers, ste-

pless cooling capacity control with

a frequency inverter, in order to

ensure the maximum energy saving

even at part load operations.

Heat exchangers are made from-

copper pipes and aluminium fins.

The ecological refrigerant R410A

grants at the same time the respect

of the environment and the incre-

ase of the energy efficiency of the

cooling circuit.

A water re-heating coil can be

included in the Std ed Eco versions

(optional in the Std version), and

with hot gas in the Dry version.

ADIABATIC COOLING SYSTEM

The adiabtic cooling system is com-

posed by atomized water in the

exhaust air flow, supplied with self-

cleaning atomizing nozzles and high

pressure pumping station, aiming

at optimizing the heat exchange in

the double recuperator. Thus allows

for a high efficiency. The first two

ramps are housed bevor than recu-

parators, increasing the exchange

efficiency.

The third ramp is located bevor the

cooling circuit coil, with the aim to

decrease the condensation tempe-

rature.

HUMIDIFYING SYSTEM

The humidifying system is with ato-

mized water in the supply air flow

and constituted by three selfclea-

ning spraying nozzles ramps.

Accessories

PROTECTION ROOF

The protection roof is made of

standard pre-painted galvanised

sheet of 10/10.

Different materials can be arranged

for. It is necessary if the unit must

be outside installed.

INVERTER ON SUPPLY AND EXHAUST

The supply and exhaust fan motors

can be equipped with inverters.

The use of inverter technology per-

mits to obtain not only economic

and energetic benefits but also an

automatic regulation and a more

stability of the flow, a reduction of

the fans maintenance costs as they

are subjected to less external prod-

dings and a reduction of the noise

level.

BAF FILTERS

The filter choice is crucial to obtain

a good treated air quality and a

correct health in all air distribution

of the canalised air.

Bag filters are classified as F9 (UNI

EN 779) and, allow for a filtration

efficiency of the pulvers higher

than 95%.

The filtration cells are fixed to a

specific bracket frame with ermetic

seal systems to avoid the treated

air by-pass. The accessibility is

possible thanks an inspection com-

partment upstream cells of suitable

dimensions for access of the main-

tenace operators.

WATER COIL

The coil is internally positioned,

downstream of the cooling circuit

coil and is made of copper pipe

with aluminium fins, blocked by

pipes mechanic expansion.

It is power supplied with hot water

with a summer post-heating fun-

ction.

The threaded sleeve for the

hydraulic connections and the air

relief valve are supplied loose.

The 3-way valve is as standard

included.

� � � � � � � � � � � � n '

� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � ! " # $ " ! �

VersionAdiabatic cooling /

dehumificationRecirculation damper

Re-heating with

hot gasCoil water

Etamax Std - -Etamax Dry - -Etamax Eco -

Accessories compatibility table

standard optional - not included

The following table shows the

available accessories for the

Etamax air handling units.

For further requests please

contact the Fast technical

department.

ÚÛ Ü1 Supply air on the internal exchanger (evaporator) rich in humidity

2 Cooled and dehumidified air

3 Air treated by the re-heating exchanger and available to the ideal conditions.

Schema of the post-heating coil operation

HOT GAS COIL

In the summer the air to be inlet to

room can contain a high humidity

rate, higher than desired value.

In ordet to be inlet in the room at

desired conditions the air flow is at

first cooled in the evaporation coil

where takes place the distinction of

the condensate.

It is than free re-heated to main-

tain the desired comfort conditions

of the served room.

The re-heating coil with hot gas is

positioned after the treatment coil

and operates by taping a hot gas

flow, downstream the compressors.

The condensate temperature goes

down and it sensible reduces the

compressors input power and at

the same time increases the cooling

power with higher efficiency (EER).

FURTHER ACCESSORIESIt is finally possible combine

the Etamax unit with all FM

models.

Please contact the Fast tech-

nical department to check

the technical feasibility.

Ý Þ ß Þ à á â ã ä å æ ä ç æ ß è é

ê ë ì í î ï ð ñ ë ï ò ó ï ë ô õ ö ì î ñ ñ õ ì ÷ ø í î ë ì ù ú û ü ý ü þ ÿ � � � � ÿ ùOperating Schemes Etamax Std

Winter operation

The exhaust air crosses the two-stages heat recu-

perators, releasing the heat to the fresh air; the

leftover heat in the air is released to the evapo-

rator of the heat pump. The external fresh air is

Þ rst heated up when crossing the recuperators

and reheated up to the desired supply conditions

by the condenser of the heat pump and by the

water reheating coil (optional).

Ex

tern

al a

ir

Su

pp

ly

Operation in intermediate seasons (free cooling with total bypass)

The exhaust air is conveyed directly outside

though a bypass damper and does not cross the

heat recuperators.

The fresh air is supplied directly into the room.

Ex

tern

al a

ir

Operation in intermediate seasons (adiaba-tic cooling)

The exhaust air is cooled with an adiabatic

system and crosses the recuperators, where it

removes heat from the fresh air ß ow. Thanks to

this operating mode the efÞ ciency is maximized,

as the cooling is obtained without the interven-

tion of the cooling circuit.

Ex

tern

al a

ir

Summer operation (high external tempera-tures)The exhaust air is cooled with an adiabatic

system and crosses the recuperators, where it

removes heat from the fresh air ß ow. The fresh

air is cooled down both by the heat exchange in

the recuperators, and by the evaporating

coil of the cooling circuit.

Ex

tern

al a

ir

Operation in intermediate seasons (free-cooling with partial bypass)

The exhaust air is partly conveyed outside throu-

gh a bypass damper and partly sent across the

heat recperators, where it releases heat to the

fresh air ß ow.

Ex

tern

al a

ir

Exh

au

stS

up

ply

Exh

au

stS

up

ply

Exh

au

stS

up

ply

Exh

au

stS

up

ply

Exh

au

st

NB. The water re-heating coil is optional

Plug-fans are optional









Ý Þ ß Þ à á â ã ä å æ ä ç æ ß è �

ê ë ì í î ï ð ñ ë ï ò ó ï ë ô õ ö ì î ñ ñ õ ì ÷ ø í î ë ì ù ú û ü ý ü þ ÿ � � � � ÿ ùOperating Schemes Etamax Dry

Winter operation

The exhaust air crosses the two-stages heat recupe-

rators releasing heat to the external fresh air; the

leftover heat in the air is released to the evapora-

tor of the heat pump. The fresh air is Þ rst heated

up when crossing the recuperators and reheated up

to the desired supply conditions by the condenser

of the heat pump and by the hot gas reheating coil

(standard).

Operation in intermediate seasons (free co-oling with total bypass)

The exhaust air is conveyed directly outside throu-

gh a bypass damper and does not cross the heat

recuperators.

The fresh air is taken from the outside and sup-

plied directly into the room.


The exhaust air is cooled with an adiabatic system

and crosses the recuperators, where it removes

heat from the fresh air ß ow. In this operating

mode the efÞ ciency is maximized, as the cooling

is obtained without the intervention of the cooling

circuit.

Summer operation (high external tempera-tures)

The exhaust air is cooled with an adiabatic system


heat from the fresh air ß ow. The fresh air is coo-

led down both by the heat exchange in the recu-

perators, and by the evaporating coil in the coo-

ling circuit. It is possible to tune Þ nely the supply

air temperature thanks to the hot gas reheating

coil (standard).

Operation in intermediate seasons (free cooling with partial bypass)

The exhaust air is partly conveyed outside through

a bypass damper and partly sent across the heat

recuperators,where it releases heat to the fresh

air ß ow.

Ex

tern

al a

irE

xte

rna

l air

Ex

tern

al a

irE

xte

rna

l air

Ex

tern

al a

ir

Su

pp

lyE

xha

ust

Su

pp

lyE

xha

ust

Su

pp

lyE

xha

ust

Su

pp

lyE

xha

ust

Su

pp

lyE

xha

ust

NB.The hot gas re-heating coil is standard










Ý Þ ß Þ à á â ã ä å æ ä ç æ ß � �

ê ë ì í î ï ð ñ ë ï ò ó ï ë ô õ ö ì î ñ ñ õ ì ÷ ø í î ë ì ù ú û ü ý ü þ ÿ � � � � ÿ ùOperating Schemes Etamax Eco


The exhaust air is cooled with an adiabatic sy-

stem and crosses the recuperator, where it remo-

ves heat from the fresh air ß ow. In this operating

mode the efÞ ciency is maximized, as the cooling

is obtained without the intervention of the cooling

circuit.

Winter operation (total recirculation)

In order to bring the room air as quickly as possi-

ble to the desired temperature, at the start-up of

the unit all the air ß ow is recirculated (recircula-

tion opened) and sent to the water reheating coil

(optional).

Operation in intermediate seasons (free co-oling with partial bypass)

The exhaust air is partly conveyed outside through

a bypass damper and partly sent across the heat

recperators, when it releases heat to the fresh air

ß ow.

Operation in intermediate seasons (free co-oling with total bypass)

The exhaust air is conveyed directly outside throu-

gh a bypass damper and does not cross the heat

recuperators.

The fresh air supplied directly into the room.

Winter operation

The exhausted air crosses the two-stages heat

recuperators, releasing heat to the fresh air; the

leftover heat in the air is released to the evapora-

tor of the heat pump.

The external fresh air is Þ rst heated up when cros-

sing the recuperators and reheated up to the desi-

red supply conditions by the condenser of the heat

pump and by the water reheating coil (optional).

Ex

tern

al a

irE

xte

rna

l air

Ex

tern

al a

irE

xte

rna

l air

Ex

tern

al a

ir

Su

pp

lyE

xha

ust

Su

pp

lyE

xha

ust

Su

pp

lyE

xha

ust

Su

pp

lyE

xha

ust

Su

pp

lyE

xha

ust

NB. The water re-heating coil is standard










Ý Þ ß Þ à á â ã ä å æ ä ç æ ß � è

ê ë ì í î ï ð ñ ë ï ò ó ï ë ô õ ö ì î ñ ñ õ ì ÷ ø í î ë ì ù ú û ü ý ü þ ÿ � � � � ÿ ù

Summer operation (high external tempera-tures)The exhaust air is cooled with an adiabatic system


the heat from the fresh air ß ow. The fresh air is

cooled down both by the heat exchange in the

plate recuperators, and by the evaporating coil in

the cooling circuit. It is possible to tune Þ nely the

supply air temperature thanks to the hot gas rehe-

ating coil (standard).

Summer operation (total recirculation)

In order to bring the room air as quickly as possi-

ble to the desired temperature, at the start-up of

the unit all the air ß ow is recirculated (recircula-

tion damper).

Ex

tern

al a

irE

xte

rna

l air

Su

pp

lyE

xha

ust

Su

pp

lyE

xha

ust






ê ë ì í î ï ð ñ ë ï ò ó ï ë ô õ ö ì î ñ ñ õ ì ÷ ø í î ë ì ù ú û ü ý ü þ ÿ � � � � ÿ ùNominal technical data

Etamax 040 060 100 160 250Nominal air ß ow rate m³/h 4.000 6.000 10.000 16.000 25.000

Minimum air flow rate m³/h 2.800 4.200 7.000 11.200 17.500

Static recovery/Active recovery

Static recovery capacity (1) kW 15,9 24,2 39,3 65,3 103,8

Static heat recuperator efficiency (1) % 76,2 73,1 72,1 74,8 76,2

Active heat recovery system cooling

capacity (1)

kW 20,8 26,8 53,4 78,2 99

Static recovery capacity (2) kW 14,8 21,3 39,3 65,7 104,8

Static heat recuperator efficiency (2) % 76,6 74 72,1 74,8 76,2

Active heat recovery system

heating capacity (2)

kW 23,3 29,6 55,4 79,9 96

Compressors input power (1) kW 7,4 9,7 17 23 22,7

Compressors absorbed current (1) A 14 13,6 26,8 33,9 33,8

Total E.E.R. (1) 3,4 3,6 3,8 4,3 4,7

Compressors input power (2) kW 6,6 8,9 14 19,6 19,9

Compressors absorbed current (2) A 14,2 12,6 22,9 30 30,6

Total C.O.P. (2) 3,9 3,9 4,4 4,9 5,1

Type of compressors / n. Scroll / 1 Scroll / 2

Power Supply 400V / 3Ph+N / 50Hz

Fans

Motors - Standard fans

Standard fans motors max. power kW 2,2 3 5,5 7,5 15

Input power at max. power A 4 5,4 9,9 13,5 27,1

Available pressure on supply Pa 300 300 300 300 300

Available pressure on exhaust Pa 200 200 200 200 200

Motors - enhanced fans

Motor max. power kW 3 4 7,5 11 15

Available pressure on supply Pa 500 500 500 500 500

Available pressure on exhaust Pa 400 400 400 400 400

Water coil

Heating capacity water coil (3) kW 25,4 33,9 60,7 102,0 136,6

Water flow m³/h 1,094 1,456 2,606 4,385 5,873

Pressure drop on water side (4) kPa 8 6 9 8 7

Pressure drop on air side Pa 28 41 33 52 80

Notes:

1 External air 35°C, RH50%; exhaust air 26°C, RH 50% adiabatic cooling active.

2 External air 7°C, RH 70%; exhaust air 20°C, RH 40%, adiabatic humidiÞ cation active.

3 Water inlet 70°C, water oulet 50°C, coil inlet air temperature 15°C.

4 It includes the 3-way valve pressure drops.


ê ë ì í î ï ð ñ ë ï ò ó ï ë ô õ ö ì î ñ ñ õ ì ÷ ø í î ë ì ù ú û ü ý ü þ ÿ � � � � ÿ ùCharacteristics of the pump modul

When the water is pressurized by

means of a pump with high pressure,

through spraying nozzles, this forms a

very fine fog composed by little drops

of average dimension lower than 10

micron. These very fine drops, evapo-

rating, quickly absorb the energy (heat)

of the surrounding room and become

water vapour (gas). The energy (heat)

used in the water transformation to

gas is taken away from the exhaust

air, giving as result air temperature

decrease. This brings as a consequen-

ce an increase of the heat recupera-

tor exchange efficiency during summer

operation.

The system is constituted by:

• pump modul to pressurize the

water (standard).

• nozzles for the pressurized water

exhaust (standard).

The pump modul supplies the three

nozzles ramps destined to the adiabatic

cooling of the air flow on exhaust with

water at high pressure.

The same modul supplies the three noz-

zles ramps for the humidification (in

winter). It is housed inside the unit and

controlled by regulation system.

CARACTERISTICS OF THE WATER

SUPPLYING THE PUMP MODUL

According to the UNI 8884 norm which

deals with the water treatment sup-

plying the circuits of the cooling and

dehumidification installations,the

caracteristics of the water suppliyng

the pump modul are the following:

• conductivity lower than 100

microS/cm

• total hardness lower than 5 French

degrees (50 mg/l CaCO3)

• pH between 6,5 and 8,5

Etamax 040 060 100 160 250Pump motor power kW 1,1 1,1 1,1 1,1 1,1

Dehumidification capacity g/Kg 5 5 5 5 5

Max. pressure Bar 70 70 70 70 70

Max. pump water flow rate l/h 120 120 120 120 240

Pump motor absorbed current A 3 3 3 3 4

Voltage V-Hz 230-50 230-50 230-50 230-50 230-50

Protection motor IP X5 IP X5 IP X5 IP X5 IP X5

Insulation class F F F F F

Max. water inlet temperature °C 15 15 15 15 15

Max. power supply pressure Bar 5 5 5 5 5

Min. power supply pressure Bar 2 2 2 2 2

Oil capacity l 0,3 0,3 0,3 0,3 0,3

Oil type SAE 20 SAE 20 SAE 20 SAE 20 SAE 20

Dehumidification ramps and nozzles n°/n° 3/16 3/16 3/25 3/25 3/28

Cooling ramps and nozzles n°/n° 3/16 3/16 3/32 3/34 3/38

Water filter m 5+1 5+1 5+1 5+1 5+1

Pump modul data

Image of the pump modul


ê ë ì í î ï ð ñ ë ï ò ó ï ë ô õ ö ì î ñ ñ õ ì ÷ ø í î ë ì ù ú û ü ý ü þ ÿ � � � � ÿ ùOperating limits

In the following diagrams are shown

the Etamax unit operating tempe-

ratures which change according

to the supply temperature with a

internal and axternal relative humi-

dity by 50%.

The first two graphs concern the

summer operation, while the others

are about winter operation.

NB.In the event that want to make

the unit operating except the indi-

cated limits, please contact the

FAST technical department.

� � � � � � � � � � �

� � � � � � � �

� � � � � � � � � � � �

� � � � �

SUMMER OPERATION

Supply temperature 24°C; Internal and external humidity 50%

LEGENDA:

Ti: internal temp.

Te: external temp.

� ��

� ��

� � � � � � � � � � � ��

� ! � � � �

SUMMER OPERATION


LEGENDA:

Ti: internal temp.

Te: external temp.

Ý Þ ß Þ à á â ã ä å æ ä ç æ ß � "

ê ë ì í î ï ð ñ ë ï ò ó ï ë ô õ ö ì î ñ ñ õ ì ÷ ø í î ë ì ù ú û ü ý ü þ ÿ � � � � ÿ ù# $% $# &# $

$% &% $# &# $' ( ) * + , - $ &$% &% $# &# $

$ % & % $ # & # $' ( ) * + ,- % $- % &- $ &$% &% $# &# $

$ % & % $ # & # $' ( ) * + ,' . ) * + ,- % $- % &- $ &$% &% $# &# $

$ % & % $ # & # $' ( ) * + ,' . ) * + ,- % $- % &- $ &$% &% $# &# $

$ % & % $ # & # $' ( ) * + ,' . ) * + ,

WINTER OPERATION


LEGENDA:

Ti: internal temp.

Te: external temp.

# $% $# &# $$% &% $# &# $

' ( ) * + , - $ &$% &% $# &# $$ % & % $ # & # $' ( ) * + ,

- % $- % &- $ &$% &% $# &# $$ % & % $ # & # $' ( ) * + ,

' . ) * + ,- % $- % &- $ &$% &% $# &# $$ % & % $ # & # $' ( ) * + ,

' . ) * + ,- % $- % &- $ &$% &% $# &# $$ % & % $ # & # $' ( ) * + ,

' . ) * + ,

WINTER OPERATION


LEGENDA:

Ti: internal temp.

Te: external temp.

Ý Þ ß Þ à á â ã ä å æ ä ç æ ß � /

ê ë ì í î ï ð ñ ë ï ò ó ï ë ô õ ö ì î ñ ñ õ ì ÷ ø í î ë ì ù ú û ü ý ü þ ÿ � � � � ÿ ùWater re-heating coil performance table

In the following table for each size

and according to the coils inlet and

outlet water temperatures, are

illustrated the water re-heating

coil performances.

This coil is supplied as optional in

the Std version, while it is stan-

dard in the Eco version.

LEGENDA

Tair: Coils inlet temperature [°C]

Q: Heating capacity [kW]

Dpw: Pressure drops on water side [kPa]

DPa: Pressure drops on air side [Pa]

Pw: Water flow to supply the coil [l/h]

Tin / Tout water (°C)

70/50 70/60 45/40

Size Tair Q Dpw Dpa Pw Q Dpw Dpa Pw Q Dpw Dpa Pw

[°C] [kW] [kPa] [Pa] [l/h] [kW] [kPa] [Pa] [l/h] [kW] [kPa] [Pa] [l/h]

EM 040

15 25,4 8 28 1094 31,8 39 28 2732 17,3 49 28 2982

20 22,2 6 28 955 28,9 33 28 2482 14,0 33 28 2407

25 19,1 5 28 820 25,1 25 28 2157 10,6 21 28 1816

EM 060

15 33,9 6 41 1456 40,3 25 41 3465 22,0 32 41 3781

20 29,6 4 41 1272 36,7 21 41 3148 17,7 21 41 3052

25 25,4 4 41 1092 31,8 16 41 2735 13,4 13 41 2303

EM 100

15 60,7 9 33 2606 72,2 40 33 6203 39,4 50 33 6764

20 53,0 7 33 2285 65,6 34 33 5638 31,8 34 33 5472

25 45,5 6 33 1958 57,0 26 33 4925 24,0 21 33 4136

EM 160

15 102,0 8 52 4385 121,3 38 52 10432 66,2 47 52 11385

20 89,0 7 52 3829 110,2 32 52 9478 53,4 32 52 9189

25 76,4 6 52 3287 95,8 24 52 8235 40,3 20 52 6935

EM 250

15 136,6 7 80 5873 162,5 29 80 13971 88,7 37 80 15248

20 119,3 5 80 5128 147,6 25 80 12694 71,6 25 80 12307

25 102,4 4 80 4402 128,3 19 80 11030 54,0 15 80 9288

Ý Þ ß Þ à á â ã ä å æ ä ç æ ß � 0

ê ë ì í î ï ð ñ ë ï ò ó ï ë ô õ ö ì î ñ ñ õ ì ÷ ø í î ë ì ù ú û ü ý ü þ ÿ � � � � ÿ ùNoise data

Data refer to the units operating at following conditions.

The sound pressure level refer to:

• Total sound pressure level on the exhaust fan (ducted).

• Total sound pressure level on the supply fan (ducted).

Exhaust fan (standard configuration, with G4 filters)

Frequency (Hz) Total

Model Flow(m³/h)

Static available pressure (exhaust)

63 125 250 500 1000 2000 4000 8000Lw

dB(A)

Etamax 040 4000 200 54 66 73 74 78 75 67 56 83

Etamax 060 6000 200 59 69 76 79 81 78 74 63 86

Etamax 100 10000 200 61 70 77 80 88 86 75 67 91

Etamax 160 16000 200 56 65 83 83 81 79 73 65 88

Etamax 250 25000 200 65 72 85 86 88 85 78 68 93

Supply fan (standard configuration, with G4 filters)

Frequency (Hz) Total

Model Flow(m³/h)

Static available pressure (supply)

63 125 250 500 1000 2000 4000 8000Lw

dB(A)

Etamax 040 4000 300 71 78 76 84 83 79 74 66 88

Etamax 060 6000 300 66 74 75 79 82 80 71 60 87

Etamax 100 10000 300 72 74 82 82 86 82 75 69 90

Etamax 160 16000 300 65 72 81 82 85 81 75 65 89

Etamax 250 25000 300 73 77 87 86 89 84 77 68 93

Ý Þ ß Þ à á â ã ä å æ ä ç æ ß � é

ê ë ì í î ï ð ñ ë ï ò ó ï ë ô õ ö ì î ñ ñ õ ì ÷ ø í î ë ì ù ú û ü ý ü þ ÿ � � � � ÿ ùDimensions

LATO ATTACCHI E ISPEZIONI

36151215

4830

1215

45

37,5341

1810

965 845

1765

157,5 930 610 37,5

356,5 341437437 29062,5109062,5

62,5109062,5

ETAMAX 040

NB. The dimensions are indicative and subject to modifications

caused by evolution of the product.


ê ë ì í î ï ð ñ ë ï ò ó ï ë ô õ ö ì î ñ ñ õ ì ÷ ø í î ë ì ù ú û ü ý ü þ ÿ � � � � ÿ ù1970

45

37,5610

157,5 1090 610 37,5

157,5 311,5 384496384495

62,5 1250 62,5

1375

62,5125062,5

12153935

5150

123423325567879:8;74<7

ETAMAX 060





1165 1165

37,51090529 486 270443,5486765,562,5157062,5

1695120

62,5157062,5

1695

158 1250 30 929,5 37,5

2405

=>?@>??>AABCDCEFDGC@HC1055

3775895

5725

ETAMAX 100



Ý Þ ß Þ à á â ã ä å æ ä ç æ ß � è


LATO ATTACCO E ISPEZIONI

300

2315

37,5 1250 37,5286,5638520,5

120 1325 13252770

688,5638688,5

62,5189062,5

157,5 1250 30 1250 37,5

120 2605

2725

62,5189062,5

2015

18553935

895

6685

45

ETAMAX 160

N.B: The dimensions are indicative and subject to modifications



ê ë ì í î ï ð ñ ë ï ò ó ï ë ô õ ö ì î ñ ñ õ ì ÷ ø í î ë ì ù ú û ü ý ü þ ÿ � � � � ÿ ù

LATO ATTACCO E ISPEZIONI

7005

2770

555 715 212,5 1250 37,5

120 1325 1325

810715810

62,5221062,5

2335

18554255

895

157,5 1570 30 930 37,5

120 2605

2725

62,5221062,5

2335

ETAMAX 250



I J K L J M N O P K Q R S T K O R U V U M R S N J N J O

FAST S.p.A. TRATTAMENTO DELL'ARIA35044 Montagnana (PD) - ItalyVia Luppia Alberi, 170Tel. (+39) 0429 806311 - Fax 0429 806340E-mail: [email protected]://www.fastaer.com

0510-6

180825-r

ev.0

The technical data given in this booklet are not binding. FAST S.p.A. reserves the right to introduce at any time whatever modifications are deemed necessary for product improvement.

etamax series

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