KDSHY026

KDSHY026-0932 GIACOMINI | Alldatasheet

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Technical content

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. 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, single-cylinder alternative Refrigerant gas R290 - 84 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 connections 2 x 1/2”F Fan Dual suction centrifuge with direct-coupled motor, 3 speeds Air filter With filtering material in synthetic fibre class G3 (EN 779:2002) Nominal operating temperature range 15÷30 °C Safety features Inlet water temperature check, evaporator, condenser, alarm signal LED and relay CHARACTERISTIC DATA Air flow rate [m3/h] 200 Pressure available (factory configuration) [Pa] 15 Moisture removed (26 °C - 65% R.H. - inlet water 15 °C) [l/24h] 24,7 Max. absorbed electric power [W] 260 Electric power absorbed by fan [W] 30 Total water flow rate [l/h] 240 Water circuit loss of pressure [kPa] 11 Weight [kg] 29 T: supply water temperature [°C] (* Design temperature) A: total cooling capacity [W] B: latent cooling capacity [W] C: dehumidification capacity [l/24h] D: power required for the water cooler [W] E: electric power absorbed [W] PERFORMANCE Dehumidification - Air flow rate 200 m3/h [air conditions 24 °C - 55 % UR] T A B C D E 12 1439 481 16,6 688 237 15 * 1297 412 14,2 631 249 18 1179 363 12,5 584 251 Dehumidification - Air flow rate 200 m3/h [air conditions 24 °C - 65 % UR] T A B C D E 12 1566 692 23,9 910 249 15 * 1372 577 19,9 799 252 18 1259 516 17,8 739 253 Dehumidification - Air flow rate 200 m3/h [air conditions 26 °C - 55 % UR] T A B C D E 12 1626 609 21 828 249 15 * 1424 490 16,9 711 251 18 1304 438 15,1 662 254 Dehumidification - Air flow rate 200 m3/h [air conditions 26 °C - 65 % UR] T A B C D E 12 1769 843 29,1 1065 252 15 * 1559 715 24,7 393 254 18 1354 587 20,3 814 257 NOISE DATA Sound power level db (A) (ISO 3747) Speed 1 Speed 2 Speed 3 Ventilation 39,6 41,4 46,2 Dehumidification 46 47,5 49,2 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. FAN AIR FLOW RATE Speed 1 Speed 2 Speed 3 Q [m3/h] P [mm w.c.] f KDSHY026

DehumiDifier unit for raDiant systems flush-mounting inst alla tion in false ceilings KDs WATER CIRCUIT PRESSURE LOSS Q [l/h] P [mm w.c.] 100 150 200 300250 0,4 0,8 1,2 1,6 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, alternative piston-operated cooling compressor - 10 cc; moisture filter. HYDRAULIC CIRCUIT: in copper pipes, with finned aluminium coil and copper pipes for air pre-treatment and post-treatment. 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 3-speed motor; the operating speed is set by choosing the wires to be connected to the electricity supply. Legend

1 Electric command panel compart-

2 Suction air filter 5 Fan

3 Cooling compressor

Figure 2 - Operating diagram with neutral air The KDSHY026 dehumidifier is a cooling cycle unit designed as a system component. Cooling systems use cooled water at temperatures between 15 and 20 °C, which is sufficient to bring the rooms to the required temperature but not sufficient to dehumidify them. Dehumidification requires water at 7 °C, produced by the chiller at a notably lower flow rate than water at 15-20 °C. Water-chilled dehumidifiers with a cooling cycle keep the air humidity in the room at optimum values (55-65%), offering the following advantages compared with other systems: - they use the cooled water from the radiant panel system; - they allow the air to be treated without altering its temperature, so without any negative effect on the behaviour of the radiant panels and their adjustment system. Fig.2 shows neutral air operation. The air is filtered via the filtering section (1) and is pre-cooled via the cooled water exchanger (2) from the collector of the radiant system (8). 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 (5 - condenser) the post-heating operation uses the heat developed by the cooling circuit. The coil (5) has a second row, called “post- treatment” , located just downstream from the cooling circuit condenser. Its job is to reduce the temperature of the air expelled from the unit so the value is no higher than the inlet temperature.

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. white - common black - max. speed blue - med. speed red - min. speed brown blue Compressor Fan condenser probe water probe evaporator probe Legend Alarm Alarm relay contacts - 250 V AC - 8 A COM - C1 Clean contact for ventilation consent COM - C2 Clean contact for dehumidification consent Figure 4 - Electric connections The unit is supplied with the fan connection at its minimum speed (red wire). Depending on the type of system and the losses of pressure in the pipes, you can increase the fan speed by connecting the blue wire (average speed) or the black wire (maximum speed) in place of the red one. The white wire must never be disconnected. The condenser (1,5 microF) is next to the motor on the fan. Operating consent The unit operates by means of two digital inputs (clean contact). Ventilation consent: contact between the COM-C1 terminals. Not usually used, but 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. 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 Access to electrical connections 5 Condensate drainage (Ø 14 mm)

2 Electric command panel 6 Water inlet (1/2”F)

3 Coupling bracket (hole Ø 6 mm) 7 Water outlet (1/2”F)

4 Suction air filter 8 Vent

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.