KDVRAY360-0935 GIACOMINI | Alldatasheet
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Ventila tion, dehumidifica tion, sensitiVe power integra tion units for radiant systems KdV
Description
KDV are monoblock units for ceiling installation and use with air treatment radiant systems. These are duct-type devices for ventilation, dehumidification and sensitive power integration. A KDVRAY360 unit connected to a radiant panel system can perform air treatment based on season and room comfort needs, thanks to the functions listed below: - air exchange, both in winter and summer, with heat recovery up to 90% - air exchange with no heat recovery (with external accessory) - summer dehumidification with control of delivery air temperature - dehumidification-free summer cooling through radiant system water - winter air heating through radiant system hot water The machine is made from a zinc-plated sheet structure that collects: a direct expansion refrigeration circuit and an alternative refrigeration compressor, a coil with fins fed from the hydraulic circuit of the radiant system, a high- efficiency air/air heat recovery, two dampers (one optional) to regulate the aeraulic flows and two electronically controlled EC fans. Thanks to the particular fans used, the machine’s electronic controller allows the user to set the air flow rate in the various functions: the unit will achieve these flow rates regardless of the pressure drop of the air ducts, provided these do not exceed the maximum pressure available. Versions and product code Product code Dehumidifica- tion Cooling integration Ventilation Technical com- munication ref. KDVRAY360 YES YES YES 0935IT KDVRAY500 YES YES YES 0942EN Technical data TECHNICAL DATA Electric power 230 V 50 hz Weight 85 kg Total dehumidification capacity (room 35 °C, 50 % R.H.) 56 l/24h 1620 W Useful dehumidification capacity (referred to recirculation, room 26 °C, 50 % R.H.) 25 l/24h 723 W Useful refrigerating capacity (referred to recirculation, room 26 °C, 50 % R.H.) 1460 W Nominal electric power absorbed 820 W Electric power absorbed by compressor 470 W Required water flow rate 360 l/h Water circuit pressure drop 12 kPa Power absorbed by delivery fan min 40 W; max 170 W Delivery fan flow rate min 90 m3/h; max 360 m3/h Delivery fan useful head 200 Pa Power absorbed by ejection fan min 40 W; max 170 W Ejection fan flow rate min 90 m3/h; max 360 m3/h Ejection fan useful head 200 Pa Energy recovery for winter operation (20 °C - 50 % internal RH, -5 °C - 50 % external RH) Flow rate 90 m3/h - efficiency 91 % Flow rate 220 m3/h - efficiency 87 % Energy recovery for summer operation (26 °C - 65 % internal RH, -5 °C - 80 % external RH) Flow rate 90 m3/h - efficiency 89 % Flow rate 220 m3/h - efficiency 82 % Acoustic pressure level (in free field, distance 1 m) 42 dB(A) Main components AIR EJECTION TO EXTERNAL ROOM AIR DELIVERY ROOM AIR RECIRCULATION INTAKE OF FOUL AIR INTAKE OF EXTERNAL AIR LEGEND
1 Air/air heat recuperator 8 Ejection fan
2 Refrigerating compressor 9 Electric panel
3 Water-powered finned coil 10 Room air recirculation damper
4 Refrigerating evaporator 11 Exchange air intake damper
5 Freon/air condenser 12 Foul air intake damper
6 Freon/water disposal condenser 13 Auxiliary air intake damper
7 Room delivery fan 14 Recuperator by-pass damper
Ventila tion, dehumidifica tion, sensitiVe power integra tion units for radiant systems KdV Refrigerating circuit operation INCOMING AIR EJECTED AIR LEGEND
2 Refrigerating compressor 6 Freon/water condenser
3 Water-powered finned coil 7 Room delivery fan
4 Refrigerating evaporator PCB Control electronic card
5 Freon/air condenser E Electronic expansion valve
Figure 2 - Thermal hygrometric operation Cooling The finned coil (3), connected to the radiant hydraulic system, provides summer cooling or winter heating. The output temperature control is performed by the unit itself through the mixing valve installed in the water circuit. Dehumidification and cooling The finned coil (3) supplied by the radiant system water pre-cools air, while the refrigerating evaporator (4) carries out subsequent cooling and consequent dehumidification of the air. The refrigerating circuit includes two parallel-connected condensers: in addition to the air-cooling condenser (5), a second condenser cooled by the ejected air flow (6) disposes of the condensation heat in the external environment. When performing this operation, the unit exploits both the ejected foul air and an additional integration flow of external air. The two electronic expansion valves (E) enable to distribute the condensation heat in the desired ratio between introduced air and ejected air; in this way, one can obtain the desired temperature for the ejected air between maximum cold and neutral. The setting values for the ejected air temperature are: - summer neutral temperature - summer integration temperature - winter neutral temperature - winter integration temperature Note: The refrigerating circuit cannot be turned on in winter nor in the exchange-only function. Aeraulic operation The flow rates of air treated by the unit can be set through the control panel. The fans set automatically on the speed required to overcome the pressure drops in the ducts. The unit can feature two air flows: an exchange flow with heat recovery through the air/air counterflow recuperator (1) and one for room air recirculation. The exchange and recirculation flows can be/not be combined based on the flow rates and type of treatment desired for the air entering the system. It also includes a duct controlled by a motorized damper which enables to intake external air without passing through the recuperator. This allows to exploit, if available, free cooling from the external air. The by-pass turns ON automatically when there is a proper input signal and the external temperature is within the limits set. The following types of air treatment can be performed: - air exchange with high-efficiency heat recovery and possible winter heating or summer cooling - free-cooling air exchange, that is with no heat recovery, both in summer and winter - winter air recirculation, with possible heating - summer air recirculation, with cooling, dehumidification or cooling and dehumidification - air recirculation with exchange air, together with all treatments provided for recirculation The air flow rates may feature the values below: - air introduced in room, flow rate setting 220 m3/h - 360 m3/h - air exchange, flow rate setting 90 - 220 m3/h - free-cooling, exchange flow rate setting 90 - 220 m3/h
Ventila tion, dehumidifica tion, sensitiVe power integra tion units for radiant systems KdV Winter operation EXCHANGE ONLY EXTERNAL ROOM SIDE INTERNAL ROOM SIDE Both fans are ON and provide exchange; the external air is heated first by the recuperator through the ejected air, and then by the hot water circulating inside the finned coil. RECIRCULATION ONLY EXTERNAL ROOM SIDE INTERNAL ROOM SIDE The delivery fan is ON; the room air is sucked and reintroduced at the temperature setting. The ejected air temperature can be set by modulating the hot water flow rate in the finned coil. The flow rate of the introduced air can be set between 90 - 360 m3/h EXCHANGE + RECIRCULATION EXTERNAL ROOM SIDE INTERNAL ROOM SIDE The fans are both ON. The introduced air is heated by the water-powered coil. The exchange air is pre-heated through the recuperator by the ejected air. The introduced air flow rate can be set between 90 - 360 m3/h, while the exchange air can be set between 90 - 220 m3/h. WINTER FREE-COOLING EXTERNAL ROOM SIDE INTERNAL ROOM SIDE The fans are both ON, the damper of the introduced external air is closed while the by-pass damper is open. The water circuit of the finned coil is closed. The air flow rate can be set between 90 - 220 m3/h. Summer operation EXCHANGE ONLY EXTERNAL ROOM SIDE INTERNAL ROOM SIDE Both fans are ON and provide air exchange: the external air is cooled first by the recuperator through the ejected air, and then by the refrigerated water of the finned coil. DEHUMIDIFICATION ONLY EXTERNAL ROOM SIDE INTERNAL ROOM SIDE The compressor and delivery fan are ON; the room air is dehumidified and transferred at the temperature setting. Should it be necessary to dispose of the heat in excess, the ejection fan intakes and ejects an external air flow, heated by the disposal coil. EXCHANGE + DEHUMIDIFICATION / EXCHANGE + COOLING EXTERNAL ROOM SIDE INTERNAL ROOM SIDE The compressor and both fans are ON. The introduced air is treated by the entire coil pack. The introduced air flow rate can be set between 220 - 360 m3/h, while the exchange air can be set between 90 - 220 m3/h. HEAT RECUPERATOR BY-PASS EXTERNAL ROOM SIDE INTERNAL ROOM SIDE Both fans are ON, the damper of the introduced external air is closed while the bypass damper is open. The introduced air is treated by the refrigerated- water coil. The air flow rate can be set between 90 - 220 m3/h.
Ventila tion, dehumidifica tion, sensitiVe power integra tion units for radiant systems KdV Control panel The machine features a remote control panel for installation on DIN template (space occupied by 6 modules) in a wall-mounting electric panel. The control panel has 3 terminal strips for: - connection to the unit through four cables that provide electric power to the panel (24 V) and serial communication with the electronic card - digital input signal for the various functions to be activated - two digital relay outlets to activate a circulation pump and an alarm in case of mulfunction. OUTLET RELAY DIGITAL INLETS MODBUS CONNECTION TO THE UNIT MODBUS connection Connection with 4 cables, 2 for 24Vdc power to panel and 2 for serial communication. Use a screened cable with a 0.5 mm 2 for connection . Outlet relays - C01-NO1: 250V AC – 5A relay which activates when water circulation is required, useful to control a pump - C01-NO2: 250V AC – 5A relay activated by alarm, useful to provide a remote alarm signal Digital inlets - COM: terminal shared by all inlets - DI01: season signal, 1 = summer, 0 = winter, if season is set from a digital inlet instead of keypad - DI02: input signal for room fan activation, this is not an operation mode but enables to keep the room air moving - DI03: exchange input signal - DI04: dehumidification input signal - DI05: cooling input signal in SUMMER or heating input signal in WINTER - DI06: exchange blocking, enables to block an exchange set with DI03 or with time schedules. This inlet, combined to DI03 and connected to a 3-position selector type 0-1-2, enables operation with three options: exchange ON, exchange OFF, AUTOMATIC exchange with time schedules - DI07: not available - DI08: input signal for flow rate attenuation; this contact enables to reduce the air flow rates without changing the functions active in a specific moment, based on the technical settings. This control is useful when the user wants to turn the unit ON privileging aerial noise reduction versus air conditioning performance, for example during the night Air treatment functions - Exchange: air exchange with flow rate provided for exchange, using heat recuperator - Cooling: it appears when the selected season is summer; the refrigerating compressor is turned ON for dehumidification and the delivery temperature will be the setting value for cooling integration. Cooling can also be performed with refrigerated water only and compressor OFF - Heating: it appears in place of cooling when the selected season is winter; the delivery temperature will be the value for operation with heating integration, achieved through the water-powered coil. The ejected air temperature is controlled by a valve modulating the water flow inside the coil - Dehumidification: the refrigerating compressor is turned ON for dehumidification and the delivery temperature will be the value for operation with neutral air - Free-cooling: it activates air exchange with the flow rate provided for free- cooling, without using the heat recuperator. In addition to the digital input signal, free-cooling requires an external temperature within the technical setting limits - Attenuation: the unit works with the flow rates set for attenuation, which are set by default at lower values compared to normal operation to limit aeraulic noise. This function is useful when the user wants the machine to work during the night
Ventila tion, dehumidifica tion, sensitiVe power integra tion units for radiant systems KdV Connections LEGEND
1 Cold/hot water inlet 7 Foul air ejection
2 Cold/hot water outlet 8 Exchange air inlet
3 Summer condensation drain 9 Foul air intake
4 Winter condensation drain 10 Electric connection inlet
5 Room air delivery 11 Hydraulic circuit air vent
6 Room air recirculation Figure 3 - Connections
Connection of water circuit pipes Shut-off valves must be installed in the refrigerated water pipes to divide the unit system in sections. After connection to the system, check the water seal of both the connections and unit to prevent damages to the room below. Condensation drain siphons There are two condensation drains, one for summer condensation and one for winter. They must ensure a 15 l/h flow rate and feature a 3% min gradient. Siphons are essential to prevent the air suction from affecting proper drainage of the condensation that may form; they must be independent, with a 40 mm min height difference and installed near the unit drain ducts. Aeraulic connections The unit includes plastic nozzles with gaskets, extending for about 4 cm, for installation of flexible or rigid ducts, as long as equipped with gaskets to prevent air leaks and consequent undesired noise. The nozzle diameters are: - delivery and recirculation: Ø 160 - exchange and ejection: Ø 160 - WC/kitchen foul air intake: Ø 125 The actual diameter of the connections is about 1 mm smaller than the nominal diameter. Electric connections Conductor section The electric power line and the sectioning devices must be determined by operators qualified for electric network planning; the cable must however feature a 3x1.5 mm2 min section, F + N+ PE. The figure below shows the terminals available for the connections: - electric power must be supplied on the unit edge - 4-cable connection to control panel; it provides both the panel 24Vdc power and serial communication. This connection cable must have a 0.5 mm2 min section and be screened. CONNECTION TO CONTROL PANEL
220 V POWER SUPPLY
Connection to control panel If the serial communication line between the control panel and the KDVRAY360 unit is longer than 25 m, a 120 Ohm, ¼ W, terminal resistance must be installed between the control panel A and B terminals. The resistance is fixed with tape on the back of the control panel, in the DIN template notch. ELECTRIC CARD ON UNIT SIDE CONTROL PANEL SUMMER/WINTER RECIRCULATION EXCHANGE YES DEHUMIDIFICATION INTEGRATION FREE COOLING ATTENUATION EXCHANGE NO COMMON COMMON
Ventila tion, dehumidifica tion, sensitiVe power integra tion units for radiant systems KdV Dimensions Fig. 4 - Dimensions in mm Product specifications KDVRAY360 Duct-type monoblock air treatment unit for ventilation, dehumidification and sensitive power integration for ceiling installation; to be combined with cooling radiant systems, complete of high-efficiency counterflow heat recuperator, removable filtering section in synthetic material class G3 (EN779:2002), 2 “brushless” centrifugal fans with motor coupled directly, n. 5 motorized dampers, refrigerating circuit with R134a refrigerating gas, hydraulic circuit, treatment coils with copper pipe and aluminum fins, 5 delivery outputs, recirculation, external outlet, Ø160 mm ejection and Ø 125 mm extraction. Total flow rate 220÷360 m³/h. External air flow rate 90÷220 m³/h. Dehumidification capacity 25 l/24h (referred to internal rooms). Water connections 2x1/2”F. Power 230 V. Additional information For more information, go to www.giacomini.com or contact our technical assistance service: ' +39 0322 923372 6 +39 0322 923255 * consulenza.prodotti@giacomini.com The information included in this technical sheet do not exempt the user from strictly complying with the rules and good practice standards in force. Giacomini S.p.A. Via per Alzo, 39 - 28017 San Maurizio d’Opaglio (NO) Italy