KDPHY024-0930 GIACOMINI | Alldatasheet
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DehumiDifier unit for raDiant systems flush-mounting wall inst alla tion KDP
Description
The KDP units are monobloc units for wall installation, to be combined with radiant systems for moisture control. Versions and product codes Units Product code Dehumidifica- tion Cooling integration Ventilation Technical com- munication ref. KDPHY024 YES NO NO 0930EN KDPRHY024 YES YES NO 0931EN Accessories Product code Description KDPCY024 Outer casing KDPFY024 Front panel Technical data CONSTRUCTION CHARACTERISTICS Refrigeration compressor Airtight, single-cylinder alternative Refrigerant gas R290 - 95 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 3-speed motor 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 Nominal air flow rate [m3/h] 200-350 Moisture removed (26 °C - 65% R.H. - inlet water 15 °C) [l/24h] 23 Max. absorbed electric power [W] 250 Electric power absorbed by fan [W] 30 Total water flow rate [l/h] 220 Water circuit loss of pressure [kPa] 11 Weight [kg] 31 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.] h 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 1358 435 15,0 642 237 15 * 1209 370 12,8 578 239 18 1084 337 11,6 548 241 Dehumidification - Air flow rate 200 m3/h [air conditions 24 °C - 65 % UR] T A B C D E 12 1481 642 22,2 851 239 15 * 1276 519 17,9 731 242 18 1117 437 15,1 651 244 Dehumidification - Air flow rate 200 m3/h [air conditions 26 °C - 55 % UR] T A B C D E 12 1537 558 19,3 767 239 15 * 1341 443 15,3 653 241 18 1210 398 13,7 612 244 Dehumidification - Air flow rate 200 m3/h [air conditions 26 °C - 65 % UR] T A B C D E 12 1689 795 27,5 1006 242 15 * 1479 665 23,0 879 244 18 1251 521 18,0 738 247 KDPHY024
DehumiDifier unit for raDiant systems flush-mounting wall inst alla tion KDP 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; 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 3-speed motor; the operating speed is set by choosing the wires to be connected to the electricity supply. Legend
1 Electric command panel
2 Suction air filter 5 Fan
3 Refrigeration compressor
Figure 2 - Operating diagram with neutral air The KDPHY024 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 wall inst alla tion KDP 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 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 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. Connections Legend
1 Condensate drainage (Ø 19 mm) 5 Electric command panel
2 System water outlet 6 Dehumidified air outlet
3 System water inlet 7 Inlet of air to be treated
4 Access to electrical connections 8 Hydraulic circuit vent (behind the filter)
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. 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 white - common black - max. speed blue - med. speed red - min. speed brown blue Compressor Fan condenser probe water probe evaporator probe 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. The temperature probes are NTC, 10 kΩ at 25 °C; the electronic card fuse is 250 V - 8 A. 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. Water-free operation Warning. The dehumidifier can operate without cooled water, but the suction air temperature must not be higher than 22 °C. The dehumidifying capacity of the unit will anyway be lower (reduced by up to 40%). Warning. Do not circulate cooling water when the unit is not working for long periods, as condensate could form on the outer surface of the unit itself. Warning. After filling the system with water, you are advised to carefully check the seal not only of the connections but also of the unit’s hydraulic circuit.
DehumiDifier unit for raDiant systems flush-mounting wall inst alla tion KDP Accessories KDPCY024 outer casing Legend
1 Rear panel 5 Left side
2 Upper panel 6 Anti-plaster panel
3 Right side 7 Angle iron for unit fixing
4 Lower panel
Figure 5 - KDPCY024 outer casing The outer-casing is made on steel. Its dimensions are: 760x619x219 mm (LxHxP). KDPFY024 front panel Legend
1 Fixing guide 3 Magnet
2 Front panel
Figure 6 - KDPFY024 front panel The panel is made of white-painted MDF. Its dimensions are: 790x630x18 mm (LxHxW) The front panel is supplied with a guide (1) that must be fixed to the upper panel of the outer casing with four self-threading screws (3,9 x 9,5 mm). The slots on the guide ensure the panel rear is perfectly aligned with the finished wall surface. On the left side of the outer casing you can fit a magnet (using two screws 2,8 x 12 mm) to hold the panel in place; the panel can subsequently be removed by raising it after detaching it from the magnet. The front panel has no anchorage screws and is removed by simply raising it by a couple of centimetres. Dimensions Figure 7 - Dimensions in mm NB. It is important to leave a gap of at least 1,5 m from the front of the grille, so the dehumidified air can circulate freely. The condensate drainage incline must be suitable for the size and length of the pipe. You must fit a drain-trap of at least 50 mm (only one, to prevent air being sucked back in via the drain pipe). Product specifications KDPHY024 Monobloc dehumidification unit for flush-mounting wall installation, to be combined with radiant cooling systems. Complete with removable filtering section in synthetic material, class G3 (EN779:2002), centrifuge fan with direct- coupled 3-speed motor, cooling circuit with R134a refrigerant gas, hydraulic circuit, treatment coils with copper pipe and aluminium fins, outer casing and front panel in white-painted wood. Dehumidification capacity 23,0 l/24h, air flow rate 200 m³/h. Ambient temperature working range 15÷30 °C. Water connections 2x1/2” F. 230 V power supply. 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