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> UTA ECHOS
Ductable direct expansion fan coil unit
GENERALlTY
Units for applications of residential and commercial type, characterised by reduced dimensions and easy installation equal to a valve convector. Due to their reduced dimensions they are particularly indicated for installations in false ceiling with ducting or air emission directly in rooms.
The air treating units are available in the following constructive versions: • UTA ECHOS direct expansion unit
• UTAH ECHOS heat pump unit
The UTA-UTAH ECHOS versions are complete with gas load inlet, thermostatic valve, inlet plug connection attachments with precarious refrigeration tap . The installation is made easier by the possibility to have (upon request) both the connections on the right side and the fan air flow downwards or upwards. The UTA-UTAH ECHOS versions are coupled with motocondensing unit functioning with R410A chiller. (Epsilon Echos /LE, Epsilon Echos /LE /HP, Mu Echos /LE, Mu Echos /LE/HP; coupling with Epsilon Echos /LE, /LE /HP is defined SPLIT SYSTEM ECHOS).
TECHNICAL FEATURES
UTA ECHOS - UTAH ECHOSl unit STRUCTUREIn models 8-18, the structure is made up in galvanised sheet with internal thermo acoustical coating in flexible polyurethane with open cells (density 30 kg/m3), flame retardant in class F1. In models 25-41, the structure is made of a frame realised in anodised aluminium borders, coupled with aluminium angular joints. The closing panels are made with galvanised sheet with internal thermo acoustical coating in flexible polyurethane with open cells (density 30 kg/m3), flame retardant in class F1.
CONDENSE COLLECTING TANK
It is made with galvanised sheet, with the outlets located on both sides of the unit in models 6-18. FANS
In models 8-18 they are forward bend blade centrifugal, coupled three speed single phase, with direct dragging through splined electric motor on the fans shaft, whereas in models 25-41 a centrifugal fan with forward bend blades coupled with an electric motor through belt/pulley transmission is mounted; high prevalence for centralised installation with ducts; the rotors are balanced both statistically and dynamically to reduce to a minimum vibrations and noise; for the models 6-18 and upon request, they can be mounted with air flow upwards or downwards (see dimensional layouts).
CONDITIONING COIL
Made with copper pipes and aluminium flanges, is provided with condense collecting tank; in the direct expansion versions
(UTA/UTAH Echos) it is complete with thermostatic valve and by-pass with check valve only in “heat pump” version (UTAH Echos). AIR FILTER Made with flame retardant synthetic fibres in class F1; maximum separation degree 85% ASHRAE 52-76 Atm (G3 compliant to EUROVENT 4/5).
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Standard on the UTW unit and for the models UTA/UTAH Echos 6-18, and is made with a terminal board for connection to room thermostat and to power supply 230V/1ph/50Hz. For models UTA/UTAH Echos 25-41 the accessory “electric control board” exists (see paragraph “ACCESSORIES”).CONNECTIONS
In models UTA/UTAH 8-18 they are the inter plug type, complete with shutoff cock, whereas in the models 25-41 they are of the welding type. In the UTW units they are ¾” or 1” Male Gas depending on the various models. Upon request, the connections can be mounted on the right side of the unit.
INSTALLATION
The units can be installed in horizontal position with different settings of the air flow; fixing to the roof is made easy thanks to the robust brackets provided.
TESTING
All units are tested in factory; in particular, the direct expansion units are preloaded with nitrogen at about 12 bar.
ACCESSORIES
ELECTRIC CONTROL BOARD
The accessory “electric control board” with protection degree IP55 exists only for UTA/UTAH Echos 25-41 models. It is made with a sectioning device, an automatic fan switch, a fan isolating switch and connection terminal board.
ROOM THERMOSTAT
Two options are available for this accessory:
1. CONTROL THERMOSTAT, electromechanical for mounting on wall, equipped with the following functionalities: a. ON / OFF switch
b. Summer / Winter selector
c. Thermostat selector switch for speed / continuous / OFF d. Three-speed fan selector
e. Viewing with a display of temperature f. Set point on the display in steps of 0.5 ° C
g. Setting differential of 0.5 ° C to 5 ° C in steps of 0.1 ° C
2. DIGITAL ROOM THERMOSTAT, digital with liquid crystals display for mounting on wall, equipped with the following functionalities:
a. ON/OFF button
b. manual SUMMER/WINTER button
c. automatic SUMMER/WINTER management d. dehumidification management
e. ventilation management only f. set point change
g. fans’ three speeds selector
h. “sleep” function (automatic speed change + automatic set point change) i. timed thermostat function
j. thermostat lock function (ON/OFF, set change, 3 speeds)
k. ON/OFF management (in list) or modulating 0/10V (N:B: available only upon special request, out of list) of the ON/OFF hot water coil valve
l. ON/OFF management (in list) or modulating 0/10V (N:B: available only upon special request, out of list) of the electric resistances m. serial connection to supervisor through bus RS485 (N:B: available only upon special request, out of list)
The accessory “air mix plenum (recirculation/external air)” exists only for UTA/ UTAH Echos 6-18 models, which allows the adjustment of the mix between the external air capacity (renew) and that of the internal air (recirculation).
ELECTRIC HEATING COIL
Is made with frame in galvanised sheet and armoured aluminium heating elements which allow a rapid and uniform heat transmission; is complete with protection fuses, safety thermostat and isolating switch. In the functioning coupled with the UTAH Echos units,its insertion is adjusted by a microprocessor, this condensing unit through the return air temperature; it is always activated during the defrosting cycle. You can change the set point of the resistance activation by adjusting the parameters A08-A09. Refer to the service before making any changes.
HOT WATER COIL
Is made with copper pipes coil and aluminium louvers. This accessory is necessary when it is not advisable to heat the room with “heat pump” unit (with low temperatures of the external air); upon request, it can be mounted with the hydraulic connections on the right side of the unit.
SILENCED PLENUM
Made with a septa silencer, reduces the noise inserted in the air duct. FLOW INLET PLUG
The accessory “flow inlet plug” exist only for models UTA/UTAH Echos 6-18, which facilitates the connection for the distribution of air through the flexible ducts.
GAS ATTACHMENTS ON THE OPPOSITE SIDE TO THE STANDARD ONE Upon request, the connections can be mounted on the right side of the unit. FANS USEFUL PREVALENCE from 100 Pa to 300 Pa
In case it is necessary to duct the UTW and UTA/UTAH units with functionings which require static prevalence from 100 to 300 Pa, it is possible to select one of the following accessories:
• fans useful prevalence equal to 100 Pa; • fans useful prevalence equal to 150 Pa; • fans useful prevalence equal to 200 Pa; • fans useful prevalence equal to 250 Pa; • fans useful prevalence equal to 300 Pa.
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FANS’ PERFORMANCES
The nominal air capacities to which the performances of the units UTA ECHOS / UTAH ECHOS and UTW are supplied, refer to the available statistic pressures (at maximum fan speed) as summarised in the table.
The capacity/prevalence bend features show the effective performances of the units, comprehensive of the internal load losses of the equipment; they refer to clean coils and air filters.
The crossing between the bends characteristic of the unit with the capacity/ load loss square bend of the plant, determines the functioning air capacity.
The capacity/prevalence characteristic bend do not take into account the eventual load losses of the optional hot water coil, which load losses are illustrated in the graph below.
To calculate the yield with air capacity conditions different from the nominal one, refer to the correction factors indicated on page 21. EXAMPLE:
Let us suppose wanting to obtain the useful static prevalence of the UTA ECHOS 8 unit with an air capacity of 0.35 m3/s and with hot water coil (load loss 11Pa); as highlighted by the performances bend, the useful static prevalence at the three speeds is:
MAX speed: 192 - 11 = 181 Pa AVERAGE speed: 150 - 11 = 139 Pa MIN speed: 41 - 11 = 29 Pa
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CORRECTION FACTORS
The above indicated bends of the correction factor of the total, sensitive and load loss yield depending on the variation of the air capacity, refer only to the UTW units, at the following functioning conditions:
• Input air temp.: 26 °C BS 19 °C BU • Input/output water temp.: 7/12 °C EXAMPLE:
Let us suppose to want to obtain the total, sensitive cooling yield and load loss of unit UTW 36 with an air capacity of 0.455 m3/s. From the table on page 4 the following values can be read: total yield: 10.4 kW, sensitive yield 7.6 kW, load loss 18 kPa.
The nominal air capacity: 0.542 m3/s. Requested capacity value expressed in % respect to the nominal capacity value: (0.455/0.542) x 100 = 84 %. From the above indicated bends the values of the corrective coefficients corresponding to the new capacity value are obtained:
84% ~> pc tot yield = 0.90; pc sen yield = 0.88 ~> pc load loss = 0.82
The new values will be:
total yield = 10.4 x 0.90 = 9.4 kW sensitive yield = 7.6 x 0.88 = 6.7 kW
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AIR MIX SECTION
(optional)It is a plenum pre-arranged to be installed with external air inlet both right and left rotating by 1800 (see drawing); and supplied, standard, the adjusting handle; on the opposite side, a 10mm square peg is present for servocontrol.
SILENCED PLENUM
(optional)It is a plenum complete with acoustical septa to be installed in air flow in order to reduce the noise inserted in the ducts; the sound pressure level at the air flow mouth, with and without silenced plenum, is reported in the following table; for completeness, also reported, is the noise value to the suction mouth of the unit, respect to which the installation or not of the silenced plenum has no influence.
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THERMOSTAT (optional)
The thermostat DB-TA-393 allows control of air temperature in summer and winter conditions.
Through the three switches located on the front of the thermostat can perform the following functions
VENTILATION
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CARATTERISTICHE TECNICHE
Power supply : 230 Vca ± 10%, 50/60 Hz
Max load
: 6 A
Output
: 1 relè SPDT 230 Vca 6 A
Power input.
: 1 W
Sensor
: NTC 10K
Scale
: 0...+40 ºC
Set point
: +5...+30 ºC impostazione a passi di 0.5 ºC
Differential
: 0.5 ºC
Display
: risoluzione 0.1 ºC
Operating
: 0...+40 ºC 10...90% u.r. (senza condensa)
Storage
: -20...+70 ºC < 95 % u.r.
Housing
: ABS autoestinguente secondo UL94 V-0 colore (RAL 9010)
Protection
: IP30, classe II
Dimensions
: 144 x 82 x 27 mm
Weight
: 220 g
DIGITAL ROOM THERMOSTAT
(option)It is of electronic/digital type and allows to control the temperature both in summer and in winter, making more functions of the “control thermostat (electromechanical)” available, also thanks to the intuitive digital display.
This accessory is made up of the three following components: LCD TERMINAL
Allows the user to set the MasterAria functioning and display the alarms. The LCD display makes its use easy and intuitive. Also contains an NTC probe which can be used to carry out the adjustment of the room temperature.
Operates the fan and adjusts the temperature. Allows connection of digital inputs for remote control functions such as ON /
OFF switch, summer / winter economy (see sleep function) etc.. It has, through its accessory, a serial port for networking of multiple units (supervisory system). It allows you to manage actuators ON / OFF (valve resistance, damper) and requests for hot and cold water to the chiller and heat pump / boiler.
