TECHNICAL MANUALUCS CASSETTE

CONDIZIONAMENTO • RISCALDAMENTOAIR CONDITIONING AND HEATING

UCS MODEL

1. GENERAL INFORMATION1.1 Applications pag. 51.2 Operation » 51.3 Performances » 51.4 Selection software » 5

2. UCS CASSETTE UNIT » 62.1 Description UCS » 7

3. COANDA EFFECT » 9

4. COMPONENTS4.1 Structure » 104.2 Heat exchangers » 104.3 Fan deck » 104.4 Electrical components and controls » 104.5 Condensate pump » 104.6 Air filter » 114.7 Air outlet plenum » 114.8 Air intake grill » 11

5. ELECTRICAL ACCESSORIES5.1 QEC10 » 125.2 QEC20 » 125.3 QEC30 » 125.4 Electric heater KREL » 125.5 Thermostats and electronic regulators » 125.6 IR Infrared control » 135.7 «OMNIBUS» Regulation » 145.8 WS – Water sensor » 14

6 HYDRAULIC ACCESSORIES6.1 DTH3B2 or DTH2B2 » 156.2 DTJ3BM or DTJ2BM » 156.3 DT – Shut-off valve (ball valve) » 16

7. TECHNICAL DATA7.1 Nominal air volumes » 187.2 Air volume of the air supply collar » 18

into an adjacent room7.3 Cooling capacities, 2 pipe system » 197.4 Heating capacities, 2 pipe system » 207.5 Cooling capacities, 4 pipe system » 217.6 Heating capacities, 4 pipe system » 227.7 Electrical data » 237.8 Working operation limits » 23

8. NOISE LEVELS8.1 Sound power » 248.2 Sound pressure in a closed environment » 24

ENCLOSURE 1

ELECTRICAL CONNECTIONS » 25

3

INDEX

1.1 Applications

The EURAPO UCS Cassette units are designed for installationon a false ceiling, suitable for heating and cooling applications.

1.2 Operation

The effectiveness of these cassette units is due to the large sur-face area of the finned heat exchanger (coil) where the airdrawn from the room by the fan passes through. The ambient air drawn through the central air intake grill isblown into the circular heat exchanger, composed by copperpipes and aluminium fins, and then it comes out from the 4sides of the cassette unit. Thanks to the special combination ofair intake/air outlet grilles it is possible to obtain the pleasantCOANDA Effect.In Heating operation, the hot water circulating in the finned coilsupplies heat to the air passing through the heat exchanger.In Cooling operation, the chilled water circulating in the finnedcoil removes heat from the air passing through the heatexchanger. The air is also dehumidified and the condensedwater vapour collects itself on the condensate tray beneath theheat exchanger. It is then evacuated by a condensate pump,factory fitted and wired, to which proper water discharge pipesmust be connected.

1.3 Performances

The performance of a cassette unit can vary greatly with chan-ges in the temperature and in the amount of water circulatingthrough the coil, as well as with changes in the temperatureand in the amount of air circulating through the coil.The air volume is determined by selecting the proper fan speed(MIN-MED-MAX), while the water flow rate is determined by thespecifications of the system and of the pump. Thermal perfor-mances of the unit can be optimised by controlling the inletflow rate of the water with proper regulating valves (ON/OFF ormodulating), which can be supplied as accessories. The use of regulating valves is always recommended incooling operation.

5

1. GENERAL INFORMATION

Installation and Operation instructions con-cerning the software for selection are givenon its «Help on line».

For each model, thermal performances in heating and coolingdepend on the number of rows of the coil installed, which givesthe opportunity to make the air treatment suit every conditionrequired.In cooling function, under the same operating conditions, themore rows the heat exchanger has, the more it will dehumidify.

1.4 Selection software

To facilitate choosing the correct size of a cassette unit for anyoperating condition (including those differing from the stan-dard ones), EURAPO offers a dedicated computer program,either available on CD-ROM or it can be downloaded from theEURAPO official web site, on request.

6

2. UCS CASSETTE UNIT

LEGEND

1 Air suction grill

2 Filter

3 Air supply grilles

4 Air intake plenum/condensate tray

5 Heat exchanger

6 Fan wheel fixing screw

7 Fan wheel washer

8 Square washer

9 Fan wheel

10 Motor

11 Air supply collar

12 Fixing support

13 Capacitor

14 Terminal board

15 Autotransformer

16 Fixing screws for air supply grilles

17 Fixing screws for air intake plenum/cond. tray

18 Collar for ext. air intake

19 Non return valve pipe

20 Flow switch for cond. pump

21 Motor for cond. pump

22 Support for cond. pump

23 Condensing water discharge pipe

7

2.1 Description UCS

Horizontal unit with air outlet on 4 sides and central air intake,suitable for installation on the false ceiling.

General features:• central air intake grill in heat resistant ABS, white colour;• 4 sides air outlet plenum with manual flaps in order to adjust

the air flow;• unit equipped with condensate tray and condensate pump;

• 2 pipe systems: 2 or 3 row coils available; in all units anelectric heater (max. 1,5 kW) can be also installed;

• 4 pipe systems: the additional 1 row coil can be added tounits with a 2 or 3 row coil;

• prearranged hole for fresh air intake (standard), diam.100 mm;

• prearranged holes for air supply into adjacent rooms(standard), diam. 150 mm.

8

FOUR PIPE SYSTEM

TWO PIPE SYSTEM

Inlet cooling water

Outlet cooling water

Inlet heating water

Outlet heating water

Water Inlet

Water Outlet

3/4” F

3/4” F

1/2” F

1/2” F

3/4” F

3/4” F

1

2

3

4

1

2

9

3. COANDA EFFECT

The particular combination of the air intake and outlet grillespermits to obtain a pleasant distribution of the air flow andcreates a good comfort in the room where the EURAPO UCScassette unit is installed.This condition is granted by the phenomenon called «COANDAEffect»: the air is blown towards the ceiling and not directlydownwards, it adheres to the ceiling (because of the depres-

sion created on the ceiling’s surface) and it attracts the aircoming from the room, by mixing with it.The air throw is longer and the air falling velocity decreases, byfalling down as rain, with a milder temperature.

The COANDA effect guarantees an uniform air distribution andit avoids a direct air flow against the people in the room.

10

4.1 Structure

The structure is made of 12/10 mm thick galvanised steel,completely insulated inside with closed cell thermal insulationmaterial, 10 mm thick. On three the of the four sides there is a prearranged hole havingdiam. 150 mm for the connection to an air supply duct.Furthermore there is a prearranged hole having diam. 100 mmfor the connection to an external air intake.The relevant collars for an easy connection to the air duct arealways supplied as standard.

The air plenum/condensate tray group is realised in heat resi-stant ABS material. The condensate tray has a water drainagehole, which is normally close by a water-tight rubber cap.The air plenum has special slots on the sides in order to permitaccess to the external air: the fresh air coming through the slotswill perfectly mix with the internal air and pass through the heatexchanger before blowing into the room.

Additionally there are four fixing supports which are part of themain structure, that are supplied as standard in a separate kit.The fixing supports can be installed on the proper holes on twosides of the cassette unit, either on the upper side or on thelower side.

4.2 Heat exchangers

The finned heat exchangers are made of copper pipes and sur-face treated aluminium fins, bent for 360°. The surface treat-ment on the fins permits to have a better condensing waterdischarge from the fins themselves and a perfect air passagethrough the heat exchanger, with reduced pressure drops and ahigh dehumidification and efficiency of the coil.

The hexagonal brass water connections have diameter ¾” Gfemale on the cooling coil and diameter ½” G female on theheating coil (4 pipe system). A particular internal fixing systemof the coil’s header will limit the problems of torsion and dama-ges on the copper pipes.

Operating pressure: 8 bar, testing pressure: 30 bar;Min/max water temperature: 5/85 °C.

A drain valve is located beneath the coil’s headers in order tocompletely discharge the water from the coil, when the unitdoes not work for a long period of time.The air bleed is done by loosening slightly the water inlet unionand supplying the water from the outlet connection.

4. COMPONENTS

4.3 Fan deck

The fan deck, installed in central position, is composed by acentrifugal fan and plastic impeller. The electric motor is single phase with permanently connectedcapacitor and thermal protection of the windings. It is provided with six speeds (by using a transformer), three ofthem are factory wired as standard, giving the nominal airvolumes.

4.4 Electrical components and controls

The electric panel (QEC00) consists of a galvanized metal boxwhich contains the terminal board for the electrical connec-tions, the earth protection terminal, the autotransformer andthe capacitor. The electric panel is located on the side of the units, at thesame side of the water connections.

Every unit is provided with an electric wiring diagram, alwaysshowing all the controls and electric accessories connected tothe unit. The wiring diagram must be strictly respected in orderto obtain the requested working conditions of the unit.

4.5 Condensate pump

The UCS EURAPO Cassette units are supplied with a built-incondensate pump having a no-return valve on the outlet.The pump has a water discharge head of 850 mm from the bot-tom side of the cassette unit. The pump is activated by a floa-ting switch and a second switch is used for closing the coolingvalve in case of too high water level in the condensate tray, dueto some problems in the water evacuation system.

Technical features:• max. water flow: 30 l/h• max. water discharge: 100 cm 15 l/h (± 10%)• power supply: 230V - 50/60 Hz• absorption: 0,06 A, 8,05 W (230V)• insulation: class B• ambient temperature: 0 to 45 °C, 95% R.H.• alarm contact: exchange contact, 250~ - 4(1)A• sound level: lift 100 cm < 39 dB(A)

11

4.6 Air filter

The air filter is composed by a metal frame on which a poly-propylene fibre is fixed. It can be easily removed thanks to twotextile tongues fixed on its frame.The filter is immediately accessible by removing the external airintake grill.

On request, the air intake/outlet grilles can be painted in every RAL colour, with delivery time and prices to be agreed.

4.8 Air intake grill

The air intake grill is realized in heat-resistant ABS plasticmaterial, white colour, with a very discreet design, covering theair outlet flaps. This particular combination of air intake and airoutlet grilles permits to avoid to have direct air flow against thepeople in the room.A perfect internal insulation with closed-cell insulating materialguarantees not to have problems of water condensation on thegrilles.

4.7 Air outlet plenum

The air outlet plenum is made by heat-resistant ABS plasticmaterial in white colour. It permits to distribute the air on the 4sides of the unit.On each side of the cassette unit there are white flaps whichcan be totally closed on one or two (max.) sides of the unit, par-ticularly used in case of an air discharge into an adjacent room.

The air intake grill is fixed by pressing the pins on the fourangles into the air supply plenum: this very easy operation offixing and removing the grill facilitates all installation and main-tenance operations.A black rope with hook permits to make the maintenance ope-rations in total safe.

12

5. ELECTRICAL ACCESSORIES

5.1 QEC10

The galvanized metal electric panel includes, besides the stan-dard terminal board (see QEC00), a double insulated transfor-mer (230/24 Vac 10 VA) for the power supply to modulating val-ves. It is supplied as standard in combination to CER10 andCER30 controllers.

5.2 QEC20

The galvanized metal electric panel includes, besides the stan-dard terminal board (see QEC00), a 230 Vac relay card for sup-porting the electric heater and/or for controlling the fan speedsin master/slave solution.It can be used in combination to the controllers CMR00,CMR10, CER00, CER20.

5.3 QEC30

The galvanized metal electric panel includes, besides the stan-dard terminal board (see QEC00), a 24 Vac relay card for con-trolling the fan speeds in master/slave solution, together with adouble insulated transformer (230/24 Vac 10 VA) for the powersupply to modulating valves and/or 24 Vac electronic cards.It can be used in combination to the controllers CER11, CER31,CER00 in 24V configuration and CER20 in 24 V configuration.

5.5 Thermostats and electronic regulators

The UCS Cassette can be controlled by one of the controllerschosen among the wide range of EURAPO regulators.In the below table there is a short description of the functions ofeach controller and some of the possible combinations betweenthe mostly used accessories and controllers.

5.4 Electric heater KREL

Stainless steel 1,5 kW electric heater supplied with 2 safetythermostats, one with automatic resetting and the other onewith manual resetting (in accordance with 73/23 CEE and EMC89/336 CEE Directives) and a power relay card (QEC20).When the Electric heater is installed, the cassette unit is inter-nally insulated with heat resistant insulating material.

For more information, please refer to the EURAPO Technical Manual for Regulators.

13

Functions

Ventilation mode (Thermostated-OFF-Continuous)

Manual speed selection

Manual and automatic speed selection

Manual S/W switch

S/W changeover with dead band or external (centralized)

Room thermostat

Limited or locked temperature setting range

De-stratification function

Economy/occupancy function

Window contact

Frost protection (with heating valve only)

Operating mode LED (Summer-Winter)

Dirty filter alarm LED

CSR00 CSR40 CMR00 CMR10 CER00 CER10 CER20 CER30

• • •• • • •

• ••

• •• •

• • • •• •

• •

• • • •• • • •• • • •• • • •• • • •• • • •• • • •• • • •• • • •

Compatibility

Only 2 pipe system

2 or 4 pipe system

ON/OFF 230V valves

Modulating 24V valves

Remote room thermostat TAD

NTC water sensor for S/W changeover (2 pipe system only)

Electric heater (in alternative to the heating valve)

CSR00 CSR40 CMR00 CMR10 CER00 CER10 CER20 CER30

•• • •• • •

• •

• • •

• • • •• •

• •

• • • •• •

5.6 IR Infrared control

If the UCS cassette unit cannot be wire-controlled, there is thepossibility to use the Infrared control: one dedicated electroniccard must be installed in the electric panel, the Infrared receiveris located in the middle of the air intake grill and the remotecontroller permits to manage the unit. The Infrared receiver hasa mode LED indicating the operating mode: GREEN for coo-ling, RED for heating, ORANGE for alarm.

FUNCTIONS-COMPATIBILITY TABLES FOR EURAPO REGULATORS

14

5.7 «OMNIBUS» Regulation

The UCS cassette unit can be equipped with the new digitalcontrol system OMNIBUS, for a complete individual or centrali-zed (BMS System) managing of the water terminal unit.For more information, please refer to the OMNIBUS TechnicalManual.

5.8 WS – Water sensor

The NTC water sensor (3 meter long) is requested in 2 pipesystems when the Cassette unit must work both in heating andcooling mode and it is controlled by a microprocessor control.

The Summer/Winter changeover works with the following pro-cedures:

• WS combined with CER00, CER20, CER30Summer: water temperature <17°C = cooling on

water temperature >19 °C = cooling offWinter: water temperature >32 °C = valve open

water temperature <30 °C = valve closewater temperature >35 °C = fan onwater temperature <33 °C = fan off

• WS combined with CER10Summer: water temperature <11 °C±1K = cooling on

water temperature >14 °C±1K = cooling offWinter: water temperature >40 °C±1k = heating on

water temperature <30 °C±1K = heating off

The water sensor is not suitable when 2 way valves are moun-ted on the unit (i.e. DTH2B2 or DTJ2BM).

15

H3B2 – H2B2 J3BM – J2BM H3A2 – H2A2 J3AM – J2AM(imp. 4 tubi) (imp. 4 tubi)

Nominal pressure PN16 – PN10 PN16 PN16 – PN10 PN16

Water connection ¾" Gm ¾" Gm ½" Gm ½" Gm

Kv: water flow rate 2,5 2,5 1,6 1,6

BODY VALVES’ TECHNICAL FEATURES

6. HYDRAULIC ACCESSORIES

6.1 DTH3B2 or DTH2B2 – ON/OFF valves, 3 way 4 port(DTH3B2) or 2 way (DTH2B2) for 2 or 4 pipe systems, 230 V

The ON/OFF regulating valves, G ¾” M (for 2 pipe system) and G ½" Mfor the heating coil (4 pipe system) 3 way with bypass or 2 way, areprovided with thermoelectric actuator and connection tubes. Thedirect flow is closed by not supplying power to the actuator. They are factory fitted and wired.

The full bore ball shut-off valves ending with G ½” F connection aresupplied separate as a kit. In the same kit the auxiliary drain pan isincluded.

These valves are available also with on/off 24V actuators: for moreinformation, please contact the EURAPO staff.

6.2 DTJ3BM or DTJ2BM – Modulating (24V) valves, 3 way 4ports (DTJ3BM) or 2 way (DTJ2BM) for 2 or 4 pipe systems

The modulating 0-10V valves, G ¾” M (for 2 pipe system) andG ½" M for the heating coil (4 pipe system) 3 way with bypassor 2 way, are provided with modulating actuator and connec-tion tubes. The direct flow is closed by not giving signal to theactuator. They are factory fitted and wired.The modulating valves are highly recommended in combi-nation to the UCS cassette unit, for the high levels ofcomfort that they can provide.

The full bore ball shut-off valves ending with G ½” F connectionare supplied separate as a kit. In the same kit the auxiliary drainpan is included.

Pressure drop diagramFor two valves having different Kvs value

Water flow [mc/h]

Pre

ssur

e d

rop

[kP

a]

kvs 1,63kvs 2,5

16

6.3 DT – Shut-off valve (ball valve)

The full bore ball valve with T handle is part of the hydraulic kit.It is designed to separate the unit from the piping system ifmaintenance is required.

Power supply Running time Control signal Protection Controllers(V-ph-Hz) (s) (Vdc) grade compatibility

H3B2 – H2B2 230-1-50(60) 180 IP 42 CMR00 – CMR10

H3A2 – H2A2 CER00 – CER20 – Omnibus

J3BM – J2BM 24-1-50(60) 0÷10 IP 40 CER10/11 – CER30/31J3AM – J2AM Omnibus

ACTUATORS’ TECHNICAL FEATURES

In order to choose the correct type of valve it is necessary to know the system’s technical specifications; for this reasonthe consultant should take full responsibility for the correct choice of the valve.

17

FOUR PIPE SYSTEM

TWO PIPE SYSTEM

Inlet cooling water

Outlet cooling water

Inlet heating water

Outlet heating water

Water Inlet

Water Outlet

1/2” F

1/2” F

1/2” F

1/2” F

1/2” F

1/2” F

1

2

3

4

1

2

Nominal values (m3/h)

Model 221-421 231-431 232-432

18

7. TECHNICAL DATA

7.1 Nominal air volumes at Ø Pa (m3/h)

Fan speed Fan speed 1 678 673 852Fan speed 2 583 579 776Fan speed 3 523 518 715Fan speed 4 412 401 594Fan speed 5 316 301 471Fan speed 6 216 204 344

7.2 Air volume of the air supply collar into an adjacent room

Air volume [mc/h]

Ext

erna

l sta

tic

pre

ssur

e [P

a]

Diagram for the indicative air volume of the air outlet collar(diam. 150 mm), at the highest fan speed.

19

7.3 Cooling capacities, 2 pipe system

Room temperature: 27 °C d.b. – 48% R.H. – Water temperature: 7/12 °C

Size 221 231 232Fan speed 1 Total cooling capacity kW 2,759 4,301 5,052*

Sensible cooling capacity kW 2,153 3,151 3,781Water flow l/h 474 739 869Water pressure drop kPa 8,6 12,0 16,0

Fan speed 2 Total cooling capacity kW 2,519* 3,864* 4,745Sensible cooling capacity kW 1,941 2,798 3,522Water flow l/h 443 664 816Water pressure drop kPa 7,3 9,9 14,3

Fan speed 3 Total cooling capacity kW 2,355 3,563 4,486Sensible cooling capacity kW 1,800 2,559 3,304Water flow l/h 405 613 771Water pressure drop kPa 6,5 8,5 12,9

Fan speed 4 Total cooling capacity kW 2,024 2,938* 3,936*Sensible cooling capacity kW 1,520 2,074 2,855Water flow l/h 348 505 677Water pressure drop kPa 4,9 6,0 10,2

Fan speed 5 Total cooling capacity kW 1,697* 2,345* 3,320Sensible cooling capacity kW 1,252 1,629 2,368Water flow l/h 292 403 571Water pressure drop kPa 3,6 4,0 7,5

Fan speed 6 Total cooling capacity kW 1,300* 1,701 2,608*Sensible cooling capacity kW 0,938 1,160 1,824Water flow l/h 223 292 448Water pressure drop kPa 2,2 2,3 4,9

Total water content l 1,2 1,7 1,7

* Standard fan speed

20

7.4 Heating capacities, 2 pipe system

Room temperature 20 °C – 50% R.H. – Water temperature: 70/60 °C

Size 221 231 232Fan speed 1 Heating capacity kW 6.219 9.061 10.943*

Water flow l/h 544 792 957Water pressure drop kPa 8.7 10.7 15.0

Fan speed 2 Heating capacity kW 5.597* 8.008* 10.162Water flow l/h 489 700 888Water pressure drop kPa 7.2 8.6 13.2

Fan speed 3 Heating capacity kW 5.247 7.346 9.516Water flow l/h 459 642 832Water pressure drop kPa 6.4 7.3 11.7

Fan speed 4 Heating capacity kW 4.402 5.895* 8.179*Water flow l/h 385 515 715Water pressure drop kPa 4.6 4.9 8.9

Fan speed 5 Heating capacity kW 3.588* 4.567* 6.779Water flow l/h 314 399 593Water pressure drop kPa 3.2 3.1 6.3

Fan speed 6 Heating capacity kW 2.656* 3.204 5.147*Water flow l/h 232 280 450Water pressure drop kPa 1.9 1.6 3.9

Total water content l 1,2 1,7 1,7

* Standard fan speed

21

7.5 Cooling capacities, 4 pipe system

Room temperature: 27 °C d.b. – 48% R.H. – Water temperature: 7/12 °C

Size 421 431 432Fan speed 1 Total cooling capacity kW 2,529 4,121 4,796*

Sensible cooling capacity kW 2,062 3,076 3,677Water flow l/h 435 708 825Water pressure drop kPa 16,6 19,9 26,1

Fan speed 2 Total cooling capacity kW 2,328* 3,723* 4,522Sensible cooling capacity kW 1,865 2,738 3,428Water flow l/h 400 640 777Water pressure drop kPa 14,3 16,6 23,5

Fan speed 3 Total cooling capacity kW 2,189 3,445 4,289Sensible cooling capacity kW 1,732 2,508 3,223Water flow l/h 376 592 737Water pressure drop kPa 12,8 14,4 21,4

Fan speed 4 Total cooling capacity kW 1,902 2,863* 3,789*Sensible cooling capacity kW 1,469 2,042 2,793Water flow l/h 327 492 651Water pressure drop kPa 10,0 10,3 17,1

Fan speed 5 Total cooling capacity kW 1,613* 2,300* 3,220Sensible cooling capacity kW 1,217 1,609 2,325Water flow l/h 277 395 554Water pressure drop kPa 7,4 7,0 12,8

Fan speed 6 Total cooling capacity kW 1,253* 1,682 2,550*Sensible cooling capacity kW 0,919 1,152 1,799Water flow l/h 215 289 438Water pressure drop kPa 4,7 4,0 8,4

Total water content l 0,9 1,4 1,4

* Standard fan speed

22

7.6 Heating capacities, 4 pipe system (additional 1 row coil)

Room temperature: 20 °C – 50% R.H. – Water temperature: 70/60 °C

Size 421 431 432Fan speed 1 Heating capacity kW 2,864 3,752 4,311*

Water flow l/h 250 328 377Water pressure drop kPa 11,9 19,9 25,5

Fan speed 2 Heating capacity kW 2,628* 3,428* 4,081Water flow l/h 230 300 357Water pressure drop kPa 10,2 16,9 23,1

Fan speed 3 Heating capacity kW 2,468 3,203 3,889Water flow l/h 216 280 340Water pressure drop kPa 9,1 15,0 21,2

Fan speed 4 Heating capacity kW 2,144 2,728* 3,482*Water flow l/h 187 238 304Water pressure drop kPa 7,1 11,2 17,4

Fan speed 5 Heating capacity kW 1,821* 2,260* 3,020Water flow l/h 159 198 264Water pressure drop kPa 5,3 8,0 13,5

Fan speed 6 Heating capacity kW 1,425* 1,728 2,470*Water flow l/h 125 151 216Water pressure drop kPa 3,4 4,9 9,4

Total water content l 0,3 0,3 0,3

* Standard fan speed

23

7.7 Electrical data

7.8 Working operation limits

The UCS Cassette units can work correctly only if the followingoperational limits are respected.

• Max. operating pressure (water side): 800 kPa• Min. inlet cold water temperature: -5 °C• Max. inlet cold water temperature: 20 °C• Min. inlet hot water temperature: 35 °C• Max. inlet hot water temperature: 85 °C

For more detailed information, please use the EURAPO soft wa refor selection.

Electrical data refer to standard UCS cassette units with clean filter and without external static pressure. A dirty filter or anexternal air pressure drop will lower the absorbed power level.The installation of electric accessories increase the absorbed power level.

Power supply: 230-1-50 (V-ph-Hz)

Model 221-421 231-431 232-432

Nominal absorbed power Fan speed 1 [W] 64 62 79*Fan speed 2 [W] 53* 52* 65Fan speed 3 [W] 46 46 56Fan speed 4 [W] 34 34* 42*Fan speed 5 [W] 24* 24* 29Fan speed 6 [W] 15* 15 19*

Nominal absorbed current Fan speed 1 [A] 0,310 0,310 0,350*Fan speed 2 [A] 0,250* 0,240* 0,280Fan speed 3 [A] 0,210 0,210 0,250Fan speed 4 [A] 0,160 0,160* 0,180*Fan speed 5 [A] 0,110* 0,110* 0,130Fan speed 6 [A] 0,070* 0,070 0,080*

* Standard fan speed

24

8. NOISE LEVELS

8.1 Sound power

The acoustic emission characteristics of any noise source isdefined as its «sound power» (SWL). This typical measure-ment indicates the total radiated energy which does not varyfor a given noise source; that is, it does not depend on theobserver, location, distance or any other factor which is notpart of the source.Following please find the values of the sound power level.

8.2 Sound pressure in a closed environment

The perceived noise radiated from a sound source is somethingquite different: noise perception is indicated by its «soundpressure» (SPL). Even though it is caused by the emission of asound energy, it greatly depends on the environment throughwhich the sound travels, on the distance from the source and onall other circumstances that are not directly related to the pri-mary noise source.

Besides the distance from the source, the most important factorthat influences the «sound pressure» (and, as a result, the per-ceived noise) in a closed environment is the amount of soundenergy reflected off surfaces that have a greater or lesser reflec-tion capacity: it depends, therefore, on the re-transmission ofsound energy (power) acting upon reflecting surfaces.Covering the walls with sound absorbing material (i.e., materialwith a low sound reflecting capacity) is the most effective way toreduce the noise level in a closed environment.The following values indicate the sound pressure emitted by thecassette unit, calculated at 1,5 meter distance and with a rever-beration time of 0,3 seconds. By using the EURAPO softwarefor selection it is possible to calculate the new sound pressurelevel obtained by changing the parameters: room volume,distance from the noise source and reverberation time.The reverberation time measures the sound characteristics of aroom: it increases as the room dimensions increase and decrea-ses as the sound absorption capacity of the structure increases.

Model 221 Fan speed 1 54Fan speed 2 MAX 51Fan speed 3 48Fan speed 4 43Fan speed 5 MED 39Fan speed 6 MIN 31

Model 231 Fan speed 1 54Fan speed 2 MAX 51Fan speed 3 48Fan speed 4 MED 43Fan speed 5 MIN 37Fan speed 6 32

Model 232 Fan speed 1 MAX 59Fan speed 2 57Fan speed 3 55Fan speed 4 MED 51Fan speed 5 45Fan speed 6 MIN 38

Model 421 Fan speed 1 54Fan speed 2 MAX 51Fan speed 3 48Fan speed 4 43Fan speed 5 MED 39Fan speed 6 MIN 31

Model 431 Fan speed 1 54Fan speed 2 MAX 51Fan speed 3 48Fan speed 4 MED 43Fan speed 5 MIN 37Fan speed 6 32

Model 432 Fan speed 1 MAX 59Fan speed 2 57Fan speed 3 55Fan speed 4 MED 51Fan speed 5 45Fan speed 6 MIN 38

dB (A)

Sound power level

Model 221 Fan speed 1 42Fan speed 2 MAX 39Fan speed 3 37Fan speed 4 32Fan speed 5 MED 29Fan speed 6 MIN 22

Model 231 Fan speed 1 42Fan speed 2 MAX 39Fan speed 3 37Fan speed 4 MED 32Fan speed 5 MIN 27Fan speed 6 23

Model 232 Fan speed 1 MAX 47Fan speed 2 45Fan speed 3 43Fan speed 4 MED 39Fan speed 5 34Fan speed 6 MIN 27

Model 421 Fan speed 1 42Fan speed 2 MAX 39Fan speed 3 37Fan speed 4 32Fan speed 5 MED 29Fan speed 6 MIN 22

Model 431 Fan speed 1 42Fan speed 2 MAX 39Fan speed 3 37Fan speed 4 MED 32Fan speed 5 MIN 27Fan speed 6 23

Model 432 Fan speed 1 MAX 47Fan speed 2 45Fan speed 3 43Fan speed 4 MED 39Fan speed 5 34Fan speed 6 MIN 27

dB (A)

Sound pressure level in a closed environment

In order to select the UCS Cassette units with calculating conditions differing from the standard ones, please use theEURAPO software for selection.

25

ENCLOSURE 1ELECTRICAL CONNECTIONS

QEC00

LEGEND(for all the electric diagrams)

M Fan motor

MS Terminal board for motor

SV Fan speed selector (OFF-1-2-3)

PE Earth

N Neutral

L Phase

TA Room temperature thermostat: E = summer, I = winter

EV Regulating valve: EVC for cooling; EVH for heating

RE Electric heater

PR Relay card

TSRM Safety thermostat with manual resetting

TSRA Safety thermostat with automatic resetting

X Terminal board

NOTE. If other configurations are required, different from the standard ones, please refer to the instruction manual ofevery specific EURAPO regulator.

26

QEC00 – EVC – EVH

QEC00 – EV

27

QEC20 – EVC – EVH MASTER/SLAVE

QEC20 – EV – RE

Via Malignani, 12 • Z.I. Vallenoncello33170 Pordenone • ItalyTel. ++39 0434 572552 • Fax ++39 0434 28667

www.eurapo.it • e-mail: info@eurapo.it

Jann

a/Pn

· st

ampa

dig

itale

gfp

.it· 0

3.08

As programs and technologies are always improving, description, data anddrawings must be intended as merely indicative and can be modifiedwithout any notice.