KDSRHY026

KDSRHY026-0933 GIACOMINI | Alldatasheet

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DehumiDifier unit for raDiant systems flush-mounting inst alla tion in false ceilings KDs

Description

The KDS units are monobloc units for installation in false ceilings, to be combined with radiant systems for moisture control with possible integration of sensible available power. Versions and product codes Units Product code Dehumidification Cooling integration Technical communi- cation ref. KDSHY026 YES NO 0932EN KDSRHY026 YES YES 0933EN KDSRHY350 YES YES 0934EN Accessories Product code Description KDSPLY003 Delivery plenum with 3 units Ø 125 mm for KDSHY026 and KDSRHY026 KDSPLY005 Delivery plenum with 5 units Ø 125 mm for KDSRHY350 Technical data CONSTRUCTION CHARACTERISTICS Cooling compressor Airtight, alternative Refrigerant gas R290 - 105 g Electricity supply 230 V 50 hz Pre-cooling coil Copper pipes (2 rows) and aluminium fins with hydrophilic treatment Evaporator coil Copper pipes and aluminium fins with hydrophilic treatment Post-heating coil Copper pipes and aluminium fins Water condenser AISI 316 stainless steel brazed plate Water connections 2 x 1/2”F Fan Dual suction centrifuge, 5 speeds Air filter With filtering material in synthetic fibre class G3 (EN 779:2002) Nominal operating temperature range 15÷30 °C Safety features Maximum pressure switch, inlet water temperature control, alarm signal LED and relay CHARACTERISTIC DATA Dehumid. Integration Air flow rate [m3/h] 200 300 Pressure available (factory configuration) [Pa] 24 45 Moisture removed (26 °C - 65% R.H. - inlet water 15 °C) [l/24h]24,7 23,8 Absorbed electric power [W] 260 270 Electric power absorbed by fan [W] 30 37 Pre-cooling water flow rate [l/h] 180 180 Total water flow rate [l/h] 220 280 Water circuit loss of pressure [kPa] 11 11 Weight [kg] 32 32 PRESSURE AVAILABLE AT THE VARIOUS FAN SPEEDS Air flow rate [m3/h] 200 300 Speed 5 [Pa] 24 18 Speed 3 [Pa] 42 32 Speed 2 [Pa] 52 45 Speed 1 [Pa] 68 60 NOISE DATA Sound power level db (A) (ISO 3747) Speed 5 Speed 3 Speed 2 Speed 1 Ventilation 39,6 41,4 46,2 50,4 Dehumidification / Integration 46 47,5 49,2 51,2 NB: the equivalent sound pressure level depends on the room where the unit is installed, and the presence or absence of ducts and/or plenums. Generally speaking, the value is 7-10 db (A) lower than the sound power level, and this value falls further when there are ducts and/or plenums. T: supply water temperature [°C] (* Design temperature) A: total cooling capacity [W] B: sensible cooling capacity [W] C: latent cooling capacity [W] D: dehumidification capacity [l/24h] E: power required for the water cooler [W] F: electric power absorbed [W] PERFORMANCE [air conditions 24 °C - 55 % UR] Dehumidification - Air flow rate 200 m3/h Integration - Air flow rate 300 m3/h T A B C D E F A B C D E F 12 1439 958 481 16,6 688 237 1602 1172 430 14,9 1824 259 15 * 1297 885 412 14,2 631 249 1423 1071 352 12,2 1647 261 18 1179 816 363 12,5 584 251 1263 981 282 9,7 1489 263 [air conditions 24 °C - 65 % UR] Dehumidification - Air flow rate 200 m3/h Integration - Air flow rate 300 m3/h T A B C D E F A B C D E F 12 1566 874 692 23,9 910 249 1643 1009 634 21,9 1869 263 15 * 1372 795 577 19,9 799 252 1747 948 526 18,2 1701 264 18 1259 743 516 17,8 739 253 1293 852 441 15,2 1522 266 [air conditions 26 °C - 55 % UR] Dehumidification - Air flow rate 200 m3/h Integration - Air flow rate 300 m3/h T A B C D E F A B C D E F 12 1626 1017 609 21,0 828 249 1733 1210 523 18,1 1959 263 15 * 1424 934 490 16,9 711 251 1512 1115 397 13,7 1740 265 18 1304 866 438 15,1 662 254 1424 1052 372 12,9 1653 266 [air conditions 26 °C - 65 % UR] Dehumidification - Air flow rate 200 m3/h Integration - Air flow rate 300 m3/h T A B C D E F A B C D E F 12 1769 926 843 29,1 1065 252 1944 1096 848 29,3 2172 265 15 * 1559 844 715 24,7 839 254 1700 1011 689 23,8 1930 267 18 1354 767 587 20,3 814 257 1454 919 535 18,5 1686 269 KDSRHY026

DehumiDifier unit for raDiant systems flush-mounting inst alla tion in false ceilings KDs Main components STRUCTURE: in galvanised metal panels entirely covered with a sound- absorbent coating in foam polyurethane with open cells. FILTERING SECTION: filtering structure in galvanised metal, with G3 filter that can be removed from every side of the unit. COOLING CIRCUIT: in copper pipes; finned aluminium coils with copper pipes, water-freon heat exchanger in braze-welded stainless steel plates. Alternative piston-operated cooling compressor - 10 cc; moisture filter, thermostatic thermal expansion valve, on-off valve on the circuit for changing the operating mode. HYDRAULIC CIRCUIT: in copper pipes, with finned aluminium coil and copper pipes for air pre-treatment; plate exchanger for refrigerant cooling; on-off valve for operating mode change. The galvanised metal unit frame contains the finned coils for air treatment, the cooling circuit for dehumidification, the suction air filter, the condensate collection basin, the delivery fan, and the electric command panel. FAN: dual suction centrifuge with forward blades, with direct-coupled 4-speed motor; the operating speed is set by choosing the wires to be connected to the electricity supply. Legend

1 Electric command panel

2 Cooling compressor 6 Plate exchanger

3 Suction air filter 7 Valve compartment

4 Finned coil

Operation with neutral air The air is filtered via the filtering section (1) and is pre-cooled via the cooled water exchanger (2). The use of cooled water to pre-cool the air is fundamental for the efficiency of the process, as it minimises the use of electricity by the cooling compressor (4). The air is then dehumidified by passing through the finned coils of a cooling circuit: the actual dehumidification takes place in the first coil (3 - evaporator), while in the second (6 - condenser) the post- heating operation uses the heat developed by the cooling circuit. The outlet air is neutral compared with the unit inlet temperature; this effect is obtained thanks to the transit of calibrated water in the plate exchanger (5) to remove the excess heat. The finned exchanger (7) acts as a cooling liquid accumulator and has a limited effect in this operating mode. The manual valve (12) has a partial opening and permits limited water transit to take out the excess heat compared with the neutral outlet air. The unit is able to function with this configuration even without water; with no pre-cooling or heat dispersal however, the outlet air temperature will be higher than that of the inlet air. Integration operation Figure 3 - Operating diagram in integration mode In this mode, the solenoid valve (10) is closed and the solenoid valve (11) is opened; the accumulator (7) drains towards the capillary pipe (13) and the freed liquid accumulates in the condenser (6). When the condenser is completely full of liquid, heat dispersal is inhibited and takes place almost entirely in the plate exchanger (5) where the cooled water freely flows via the open valve (11). In integration operation, there is also a switch to a higher fan speed, which is factory-set to provide 200 mc/h in dehumidification mode and 300 mc/h in integration mode. Integration operation is only possible with a cooled water supply. Figure 2 - Operating diagram with neutral air

DehumiDifier unit for raDiant systems flush-mounting inst alla tion in false ceilings KDs LED display diagnostics Red “POWER” LED: a fixed light indicates that the power supply is enabled. Green “COMPR” LED: indicates dehumidification consent. A fixed light indicates that the compressor is working. A flashing light indicates that the compressor is in standby following start-up or a fault. Alarm LEDs 3 and 4: see the table below = LED off = LED on = LED flashing Connections Condensataion drain: - The condensate drain must have a slope adapted to the size and length of the tube; - It is necessary to provide a siphon, and only one, to prevent suck back of air from the drain pipe. Electric connections WIRE SECTION The electricity supply line and the disconnection devices must be determined by qualified electricity design experts; in any case, the cable section must be at least 3x1,5 mm2, L + N + E. For operating consent: the cable must have a minimum section of 0,5 mm2. ELECTRIC LAYOUT The unit is usually supplied with the fan connection at its minimum speed, but the speeds for the dehumidifier or cooling dehumidifier can be set during the installation phase. Figure 5 - Electric connections OPERATING CONSENT The unit operates by means of two digital inputs (clean contact) and a 220 V signal. Ventilation consent: contact between the COM-C1 terminals. By closing the contact you can activate the fan only (to force the movement of the air). Dehumidification consent: contact between the COM-C2 terminals. Usually jumpered if there is no room humidity adjustment system. The unit interrupts operation when the contact between the two terminals opens. Integration consent: contact between the COM-C3 terminals. The unit operates in cooling mode. Renewal consent: contact between the COM-C4 terminals. This activates the renewal mode of the air recovery unit (if present). Yellow LED ALARM1 Red LED ALARM2 Diagnosis Permanency No alarm Room temperature too high, or empty circuit Permanent alarm Room temperature too low Permanent alarm Maximum cooling pressure lockout Permanent alarm Delivery water temperature higher than 30 °C It resets by itself, if the temperature falls Yellow LED ALARM1 Red LED ALARM2 Diagnosis fast flashing One of the probes is faulty: 1 flash: evaporator probe 2 flashes: water probe 3 flashes: condenser probe fast flashing One of the probes is disconnected: 1 flash: evaporator probe 2 flashes: water probe 3 flashes: condenser probe Legend

1 Dehumidified air outlet 6 Water inlet (1/2”F)

2 Filter for air inlet 7 Water outlet (1/2”F)

3 Coupling bracket (hole Ø 6 mm) 8 Vent

4 Electric command panel 9 Water bypass valve

5 Condensate drainage (Ø 19 mm)

Nota. In the event of a permanent alarm, the compressor stops and does not restart. To reset the alarm, disconnect the electricity supply to the electronic card and then reconnect it again.