3 Pipe Heat Recovery VRF System Introduction Content

3 Pipe Heat Recovery VRF System Introduction

Content 01 Why Needs Heat Recovery system 02 Three Pipe system introduction 03 Main Features 04 Operation and installation

01 Why Needs Heat recovery VRF

Cooling Heating

Comfort requirement : Simultaneous cooling and heating 2 -pipe system Heating Cooling For cooling and heating in one building , we need two systems 3 -Pipe system Heating& Cooling For cooling and heating in one building , we need one system

High Efficiency 2 -pipe system 5 HP 5 HP 3 -Pipe system 5 HP 5 HP For 2 pipe system, cooling and Heating are separated, need 20 HP outdoor unit ; For 3 pipe system , cooling and heating in the same system, need 10 HP outdoor unit 5 HP

High Efficiency Save max 50% power consumption Condensing heat from indoor units running in cooling mode can be used for indoor unit requires heating, vice versa. Which can save power consume up to 50% 10 HP 2 pipe system 10 HP 3 pipe system

High Efficiency EER/COP 7. 02 6. 83 6. 75 6. 54 100% Cooling 75% Cooling 25% Heating 50% Cooling 50% Heating 25% Cooling 75% Heating 100% Heating

CHIGO Solution CS box

02 Three pipe system introduction

Outdoor unit module design 8 HP 10 HP 12 HP 14 HP 1. 2. 3. Five basic module : 8 HP / 10 HP / 12 HP /14 HP /16 HP Module design : Max 4 units in one system Max Capacity : 64 HP 1. 2. 3. World famous Hitachi DC compressor All DC inverter compressor improve the efficiency For 8/10/12 HP , one DC, for 14/16 HP , two DC 1. 2. High efficiency DC fan motor Step-less controlled by system operation pressure 16 HP

CS BOX Model CMV-CS 02/R 1 CMV-CS 04/R 1 CMV-CS 06/R 1 Appearance Max indoor unit capacity Max connect indoor unit 28 kw 8 45 kw 16 45 kw 24 One branch can connect to MAX 4 indoor units, MAX 16 kw

Design Principle Liquid pipe Low pressure gas pipe High pressure gas pipe To indoor unit

03 Main Features

Safe and reliable DC compressor • Scroll type compressor • Permanent magnets • Small exhaust fluctuation • Large refrigerant discharge buffer volume • Lower vibration and noise • Small change in rotational torque • Adjustable frequency Neodymium conventional

Precisely control • • Detect system pressure real time Adjust compressor running frequency / fan speed / EXV opening quickly , control refrigerant flow accurately. Running at 60% load Running at 30% load Pressure sensor

Brushless DC motor • • • Well known brand DC motor with high efficiency Lower noise and high density wire winding engineer Stepless control DC motor AC motor

180° sine waveform control The perfect combination 180° sine waveform rotor frequency drive control technology and excellent IPM inverter , increase the efficiency. Smooth 180°shine wave, operation efficiency is improved around 12% Conventional saw tooth wave, low operation efficiency

Improvements to reduce noise Anti-vibration fan blade Streamline duct design Bushless DC motor 180 sine waveform control Refrigerant flow noise reduction design Night time silent operation Circuit silencer Low noise DC compressor 3 -D simulate pipeline design

6 stage oil control Compressor internal oil separator Oil balance between outdoor units From system oil separator Oil balance between compressors From oil even pipe By system oil return program

Cycle operation l In one combination system, any outdoor unit can run as master unit. l Balance the lifespan among outdoor units in one system. l It starts when reach setting temperature then restart or after oil return program or after defrost mode. C B A Time x: Start order: A→B →C C B A Time x+1: Start order: B→C →A C B A Time x+2: Start order: C→A →B

Intelligent defrosting program Program starts only when units needs to, reduce fluctuation in temperature and personal comfort; l It starts only when outdoor unit coil temperature is lower than 0 degree; l It ends when defrost time reach to 10 minutes or outdoor coil temperature is higher than 15 degree. Heating Capacity output l Intelligent defrosting program Conventional program Time

Realize heating during defrost l Two independent heat exchanger ; l Each exchanger defrost procedure is using heat transferred from one heat exchanger to the other l Defrost has no influence for indoor unit in heating mode Heating Heat exchanger 1 Heat exchanger 2 Defrosting exchanger 1 Heat exchanger 2 Defrost exchanger 2 Heat exchanger 1 Heat exchanger 2

External Static pressure l Adjustable outdoor ESP , low/medium/high ESP l Standard 0 Pa l Outdoor unit can be installed in the service floor or facility room l Maximum ESP 85 Pa

3 phase power protector (Optional) The power supply voltage is instable in some areas, it used to protect outdoor unit from frequently changeable voltage.

Sub-cooling pipe in CS box Liquid pipe Low pressure gas pipe EXV Sub-cooling pipe High pressure gas pipe Use some liquid refrigerant flow through EXV to get lower temperature refrigerant , to cool down the rest refrigerant and the lower temperature refrigerant flow into indoor side. EXV

Only one vacuum pump is needed • • Power on the system before vacuum, all the valves of CS mode switch and indoor unit will open; Connect vacuum pump to any two pipes of liquid/low pressure gas/high pressure gas pipe; Only one vacuum pump is enough; After vacuum, power off and run out of vacuum mode. Liquid pipe Low pressure gas pipe High pressure gas pipe To indoor units

Wide operation range -20 • • • -15 -10 -5 0 5 10 15 20 25 30 35 40 45 50 ℃ When it is lower than -5 degree, cooling mode can’t start, higher than 50 can start with bad performance; Only from -5 to 24 degree, system can run in cooling and heating mode at same time; When it is higher than 24 degree, heating mode can’t start, lower than -20 can start with bad performance.

Long pipe length connection <70 m (110 m) l Total pipe length up to 1000 m <175 m l The longest actual pipe length: 175 m <90 m <30 m l Height difference between IDU and ODU: • 70 m (ODU upper) • 110 m (ODU down) l Height difference between indoor units: 30 m l From 1 st distributor to the farthest : 90 m l CS box to indoor unit pipe length : 40 m

04 Operation and installation

The difference between 2 pipe and 3 pipe system 2 pipe system 3 pipe system

Main difference EXVA Left heat exchanger Liquid pipe EXVB Right heat exchanger Low pressure gas pipe High pressure gas pipe ST 1 ST 2 ST 3 Compressor Gas balance pipe

Cooling only Left heat exchanger EXVA CS BOX EXVB Right heat exchanger ST 1 OFF SVA SVB ST 2 OFF ST 3 On EXV Compressor Cooling

Heating only EXVA Left heat exchanger CS BOX EXVB Right heat exchanger SVA ST 1 ON SVB SVA SVB ST 2 ON ST 3 OFF EXV Compressor Heating

Main Cooling (left condenser, right condenser ) EXVA Left heat exchanger CS BOX EXVB Right heat exchanger ST 1 OFF SVA SVB ST 2 OFF ST 3 OFF EXV Compressor Heating Cooling High pressure is ① higher than 3. 7 Mpa when pressure is increasing or ② higher than 2. 3 Mpa when decreasing.

Main Cooling (left evaporator, right condenser ) EXVA Left heat exchanger CS BOX EXVB Right heat exchanger ST 1 ON SVA SVB ST 2 OFF ST 3 OFF EXV Compressor Heating Cooling High pressure is ① higher than 3. 3 Mpa when pressure is increasing or ② higher than 2. 0 Mpa when decreasing.

Main Cooling to main heating (left evaporator, right OFF ) EXVA Left heat exchanger CS BOX EXVB Right heat exchanger ST 1 ON SVA SVB ST 2 OFF ST 3 OFF EXV Compressor Heating ①T 2 b average is higher than 18 degree or ② T 2 b≥ 6 degree and high pressure is higher than 3. 3 Mpa. Cooling

Main heating Left heat exchanger (left evaporator, right evaporator ) EXVA CS BOX EXVB Right heat exchanger SVA ST 1 ON SVB SVA SVB ST 2 ON ST 3 OFF EXV Compressor Heating Cooling High pressure is ① lower than 3. 5 Mpa when pressure is increasing or ② higher than 2. 0 Mpa when decreasing

Main heating to cooling mode (left evaporator, right condenser ) Left heat exchanger EXVA CS BOX EXVB Right heat exchanger SVA ST 1 ON SVB SVA SVB ST 2 OFF ST 3 OFF EXV Compressor Heating Cooling High pressure is ① lower than 4. 0 Mpa when pressure is increasing or ② higher than 2. 3 Mpa when decreasing

Refrigerant in CS box : Cooling mode CS BOX Liquid pipe Low pressure gas pipe High pressure gas pipe SVA SVB

Refrigerant in CS box : Heating mode CS BOX Liquid pipe Low pressure gas pipe High pressure gas pipe SVA SVB

Piping connection In one system , max 4 outdoor unit can be connected , max 64 indoor units can be connected.

Filter capacitor IPM modular Main PCB Display tube Check button Communication terminal DC Fan module board Power Supply terminal Function Switch 3 -phase filter board

Wiring connection In one system , there is no quantity limitation for CS box, all indoor units addresses should be different. PQE PQE H 1 H 2 E PQE PQE

Wiring connection To power supply To outdoor or next CS PQE To indoor PQE

Thank you