LG VRF APPLICATION for AIR HANDLING UNIT Dx Coils VRF AHU Dx Coils • Ventilation and conditions • Basic on AHU designing and selection – Weather conditions – Air quality/comfort conditions • Dx application and components • LG VRF AHU Dx solutions – HEX (coils) structure: single, multiply – Refrigerant flow control: EEV, TEX • Control solutions VRF AHU Dx Coils Weather statistic average temperature and Relative humidity in Montenegro Podgorica VRF AHU Dx Coils Solutions: Fresh Air Supply Fresh Air supply + heating/Cooling load Health & Comfort The increase of living in closed space and concentration of polluted material gives bad effect on human health Gas-phase Particle Gas-phase polluted polluted material material Particle polluted polluted material material Material Main reason Health Material Main reason Health Dust outdoor air , clothes allergy Mite’s excretion, fiber particle carpet,pet, food scrap ,mite allergy tobacco lung cancer, etc Bacteria people, outdoor air indoor air pollution index CO2 body, combustion no direct harmfulness except high concentration CO atmosphere pollution, tobacco deadly poisonous even though low concentration NO2 atmosphere pollution, tobacco lung stimulation HCHO veneer board adiabatic material eye,skin stimulation headache,vomiting SO2 combustion, atmosphere pollution eye,skin,mucous membrane stimulation O3 radiation, Atmosphere pollution eye,skin upper airway stimulation Mold construction material, outdoor air allergy Rn soil,stone, underground water lung cancer Pollen outdoor air allergy odor body,tobacco heat/cooling system discomfort Asbestos adiabatic material lung cancer,skin disease tumor,etc   Smoke VRF AHU Dx Coils Air quality and Ventilation CR 1752, EN 15251 Demand by person, and Function/Category Air quality - ventilation Efficiency of ventilation Air flow demand VRF AHU Dx Coils Selection Complex Solution by air quality + concerning building load calculation Heating/cooling loads involved with a building include outside attributes such as external temp, solar radiation, wind and humidity as well as inside attributes such as human heat, heat from lighting and electronic appliances, in addition to loads generable thru exterior walling structure and windows of the building Such architectural/environmental elements cause heating/cooling loads to take place External temp Wind Humidity Solar radiation Outdoor unit Heat transfer Heat from human, lighting, device Pipe/duct system Indoor unit Based on indoor Temp/humidity Building loads (q) Cool(heat remove) heat(heat added) Heat loss System process Heat loss System function Efficiency lowered VRF AHU Dx Coils Designing conditions Factors Factors Regulations Regulations Design Design Condition Condition Categories Temperature Temperature Humidity Humidity Cleanness Cleanness Air Air current current 17 ~ 28 ℃ 40 ~ 70 % Floating dust: 0.15 mg/ ㎥ CO: 10 ppm CO2: 1000 ppm Under 0.5 m/s Summer Winter Ordinary building (office/residence) 26 ℃, 50 % 22 ℃, 50 % Commercial building (bank/department) 26 ℃, 50 % 21 ℃, 50 % Industrial building (factory) 28 ℃, 50 % 20 ℃, 50 % CO2 Standard Indoor design spec 1,000 ppm Outdoor design spec 350 ppm Categories Cooling Heating Air velocity (m/s) 0.1 ~ 0.25 0.13 ~ 0.18 1.7 ℃ 2℃ Gap between up and down ding to different countries, these regulations might be different VRF AHU Dx Coils To calculate/estimate capacity of HVAC system, in either individualized or centralized system, considerations shall be taken on loads required in terms of building load, heat source system, distribution system & airconditioning system Cooling load subject to external Temp/building characteristics Building load Capacity of outdoor unit Considering system functions Arrangement of indoor unit For better cooling Terminal Unit Distribution Header Solar • Roof • Wall • Glass window Heat source Chiller 35℃ Outside AHU 24℃ Remove load FCU/convector • Ext air entry • Ventilate Human light, equipment • Lighting • Human body • Equipment Remove load Boiler Heat pump IDU Refrigerant pipe VRF AHU Dx Coils Ventilation Ventilation Type Type 11 Exhaust Fan Supply Fan •Supply Fan and Exhaust Fan •The pressure in the room can be controlled by two fans Indoor Ventilation Ventilation Type Type 22 •Fresh outdoor air is mechanically supply Supply Fan Indoor Natural Exhaust •The room is in positive pressure (ex surgery theatre,clean room) Ventilation Ventilation Type Type 33 Natural Supply Indoor Exhaust Fan •The stale air in the room is mechanically discharged •The room is in negative pressure (ex kitchen, bathroom) VRF AHU Dx Coils RA PRCKA1 – How does it work? #1 AHU Comm Kit senses return/room air(selectable) temperature LG Wired remote controller Room air Return air RA PRCKA1 - MULTI V™ Series How does it work? #2 AHU Comm Kit senses return/room air(selectable) temperature If return(room) air is higher than setting temperature, outdoor unit will start operation (based on cooling operation) IDU A-B LG Wired remote controller Room air Return air Coil RA PRCKA1 - MULTI V™ Series How does it work? #3 AHU Comm Kit senses return/room air(selectable) temperature If return(room) air is higher than setting temperature, outdoor unit will start operation AHU Comm Kit outputs fan signal(220-230V) according to return(room) air condition IDU A-B LG Wired remote controller Room air Return air Fan output signal* (220-230V) Control panel Relay Relay ON ON OFF OFF Coil Summary of return air control with PRCKA1 LG Centralized controllers MULTI V™ Series CEN A-B LAN IDU A-B LG Wired remote controller BACnet Modbus Lonworks AHU Communication KIT (Model : PRCKA1) TB 12-13-14 AHU #1 Main features Power Supply 220-230 V TB 4-5 - For simple AHU control with return air control TB 1-2-3 : Refrigerant coil on/off, mode change, fan on/off, etc Coil - Support LG Centralized controllers Fan Signal Output - EEV Kit or TXV(Expansion) Kit can be applicable Function By LG Remote controller Control AHU Comm Kit ON/OFF O Outdoor unit operation (Compressor operation) - Mode Monitor LG Wired remote controller LG Wired remote controller O AHU #2 O Fan/Heating/Coolin Fan/Heating/Coolin g g High/Mid/Low High/Mid/Low Return(room) air temperature Cooling 18~ 30℃ Heating 16 ~ 30℃ O Supply air temperature control via DDC With IO Module (PVDSMN000) - Error status - O TB 1-2-3 Coil Fan Step Power Supply 220-230 V TB 4-5 To Indoor units or other AHUs Fan Signal Output Supply air control via DDC with PRDCA0 Concept CONCEPT - SA control via DDC with PRDCA0 LG Wired remote controller (for only monitoring) MULTI V™ Series AHU Controller (Filed supply) DI signals DO signals ODU Centralized control 0~10 V, AI signals ODU-AHU Communication Kit Supply air temp Sensor(Field supply) Fan output signal* (220-230V) (Field supply) Relay Relay Coil Return air Control panel Fan power (Field installation) ON ON OFF OFF Summary of supply air control with PRDCA0 MULTI V™ Series CEN A-B AHU Controller (Filed supply) IDU A-B AHU Communication KIT (Model : PRDCA0) AHU On// Off Off control control&& monitor monitor On AI Modecontrol control&&monitor monitor Mode AI TB#1 19-2 0-21 Fan control control&& monitor monitor Fan Outdoorunit unit capacity capacitycontrol control Outdoor (Supplyair aircontrol controlvia viaDDC) DDC) (Supply Room temperature temperature Room LG Wired remote controller (for only monitoring) Control specification for DDC wiring DI DI DI DO DO DO Power Supply 220-230 V TB#1 23-24 TB#1 11-12 Function TB#1 1-2-3 Coil Fan Signal Output By AHU Comm Kit (PRDCA0) Control Monitor AHU Comm Kit ON/OFF Digital input (Non voltage) Digital output (Non voltage) Outdoor unit operation (Compressor operation) - Digital output Mode Fan/Heating/Coolin g Digital input Fan/Defrost/ Heating/Cooling Digital output Fan Step High/Mid/Low Digital input High/Mid/Low Digital output Return(room) air temperature Cooling 18~ 30℃ Heating 16 ~ 30℃ DC 0~ 10V Input With remote controller (PQRCVSL0QW) Supply air temperature control via DDC 40~100% DC ~ 10V Input - Error status - Digital output VRF AHU Dx Coils Summary of supply air control with PRDCA0: AI -10V Target pressures/temperature HEX – Coils in AHUs Supply air control via DDC with PRCKA1 Concept CONCEPT - SA control via DDC with PRCKA1 MULTI V™ IV LG Wired remote controller Optional AHU Controller (Filed supply) Centralized control ODU-AHU Communication Kit Dry contact for thermostat IO Module (Demand control for supply air) Supply air temp Sensor(Field supply) Fan output signal* (220-230V) (Field supply) Relay Relay ON ON OFF OFF Coil Return air Control panel Fan power (Field installation) 0-10V Analog control Control summary of supply air control via DDC with PRCKA1 Control Fan speed input - Non voltage input Mode input - Non voltage input Operation input - Non voltage input Operation output - AC or DC, Max 1A Error output - AC or DC, Max 1A Demand(capacity) control input - DC ~ 10V Supply air temperature(filed supply) – Check manufacture's specification Fan signal output – AC 220~240V, Same as supply power level Control panel (Field supply) Supply air control via DDC with PRCKA1 SA PRCKA1 – Detail #1 Dry contact Fan Speed input Mode input Operation ON/OFF input Non voltage inputs SHORT : ON OPEN : OFF Dry contact for thermostat Control panel Operation status output AC or DC ON : SHORT Max 1A OFF : OPEN Error status output AC or DC Error : SHORT Max 1A No Error: OPEN (Field supply) Supply air control via DDC with PRCKA1 SA PRCKA1 – Detail #2 IO Module 6 Demand Control for supply air IO Module (Demand control for supply air) DC 0~10V 40~100% outdoor unit Capacity control DC ~ 10V Supply air temp Sensor(Field supply) Control panel (Field supply) Supply air control via DDC with PRCKA1 SA PRCKA1 – Detail #2 IO Module PRCKA 1 AC 220 240V PRCKA 220-240 V same as power supply voltage level Fan signal output Control panel (Field supply) Summary of supply air control with PRCKA1 LG Centralized controllers (Optional) MULTI V™ Series CEN A-B LAN IDU A-B AHU Communication KIT (Model : PRCKA1) BACnet Modbus Lonworks AHU Controller (Filed supply) Control specification for DDC wiring Fan speed input - Non voltage input Mode input - Non voltage input Operation input - Non voltage input IO Module Supply air temperature(filed supply) – Check manufacture's specification Fan signal output – AC 220~240V, Same as supply power level Outdoor Outdoorunit unit capacity capacitycontrol control (Supply (Supplyair aircontrol controlvia via DDC) DDC) By LG Remote controller Control DI DI DO DO Dry contact for thermostat LG Wired remote controller Monitor AHU Comm Kit ON/OFF O O Outdoor unit operation (Compressor operation) - O Mode DI LG Wired remote controller Function of LG remote controller Function Errormonitor monitor Error Demand(capacity) control input - DC ~ 10V On//Off Off monitor monitor On On// Off Off control control On AI_1 Modecontrol control Mode Error output - AC or DC, Max 1A Fanspeed speedcontrol control Fan Operation output - AC or DC, Max 1A TB#2 12-13-14 AHU CN-CC TB#2 4-5 Fan/Heating/Coolin Fan/Heating/Coolin g g High/Mid/Low High/Mid/Low Return(room) air temperature Cooling 18~ 30℃ Heating 16 ~ 30℃ O Supply air temperature control via DDC With IO Module (PVDSMN000) - Error status - O Coil Fan Step TB#2 1-2-3 Power Supply 220-230 V Fan Signal Output VRF AHU Dx Coils LGE AE CONTROL DEVICES SUPPLY AIR CONTROL: VRF AHU Dx Coils LGE AE CONTROL DEVICES SUPPLY AIR CONTROL: ... Function By LG Remote controller Control AHU Comm Kit ON/OFF O Outdoor unit operation (Compressor operation) - Mode Monitor LG Wired remote controller LG Wired remote controller O AHU #2 O Fan/Heating/Coolin... discharged •The room is in negative pressure (ex kitchen, bathroom) VRF AHU Dx Coils VRF AHU Dx Coils VRF AHU Dx Coils VRF AHU Dx Coils HEATING: different concept – different energy consumption... range [DIN EN 13779:2004] 25 30 35 40 Absolute moisture content [g/kg] VRF AHU Dx Coils VRF AHU Dx Coils VRF AHU Dx Coils LGE AE CONTROL SOLUTIONS : Room temperature (exhaust) controlled It means