01 MDS Introduction

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Techn ical Training 2007

TECHNICAL TRAINING

2007


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Content

Introduction

System & Control

PCB Program Upgrade

Selection Software

Installation

Troubleshooting & Commissioning

Site Visit

Monitoring Software Operation & Demo Kit Introduction


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MDS INTRODUCTION


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Variable Capacity

Multiple Indoors

Centralized Air-conditioning system

What is a MDS?

Variable Refrigerant FlowSystem (VRF)


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High living standard : Demand higher comfort level

Anytime, Anywhere

Cooling load increase

Prolonged cooling period

Comfort but big energy eater

High energy cost & environmental concern

Facing dilemma

How can we achieve energy saving without

sacrificing comfort?

Why VRF system is developed?


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Solution : Individual Air Conditioning

Switch on/off freely

Suitable for random occupancy

Individual temperature setting and control

Comfort for everybody

Independent system

Capacity and Energy consumption change in parallel

Do not bother other unit

VRF System is developed!


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Digital Scroll

System

Copeland digital scroll compressor

InverterCompressor System

Compressor with inverter motor

Multiple

Compressor System

Multiple fixed speed compressor.

Can be same or different capacity

Type of VRF System



DIGITAL SCROLL

TECHNOLOGY



PWM Valve

Pulse Width Modulation

Discharge

PressureBalance Pipe

Suction

Digital Scroll Compressor



Orbiting Scroll

(YellowFixed Scroll

(Brown

Digital Scroll Compressor



1. Built based on Copeland Axial Compliance feature/principle

- Ensure two scrolls are loaded together with optimal force- Axial Compliance allow 1mm vertical movement

How Does Digital Scroll Compressor Works?



2. Modulation Mechanism

Unloaded (0) - Zero Capacity

1.0 mm Scroll

Separation

Loaded (1) - Full Capacity




PWM valve power off

PWM valve close

Fixed scroll movedownwards & operates as

per normal compressor Fixed scroll move in the

axial direction to theorbiting scroll until theyare very near (very smallamounts)

Loading

Loading



PWM valve power on

PWM valve open

Discharge chamber

and suction pipesbecomes connected

Fixed scroll moveupward

Two scrolls separated

Unloading

Unloading



3. Concept of Cycle Time

= Loaded State Time + Unloaded State Time

- Duration of these 2 times determine the capacity modulation

of compressor

Example:

In a 20 second cycle time, if the loaded time and unloaded

Time is 10 seconds respectively, the compressor modulation is

50%




To View, Click on Slide Show



Features Wide modulation range

Quick response

Precise modulation

Stable action Tested up to 40 million cycle,

equivalent to 30 years ofoperation

Electronic Expansion Valve



High Pressure Ratio 2,000 Hours For Lubrication / High Temperature

High Load 2,000 Hours For High Temperature / Pressure

Start / Stop 520,000 Cycles For Vibration

Flooded Start 1,000 Cycles At 100 To 150% Charge Limit ForSlugging And Lubricant Migration

Defrost Flood back 2,000 Hours At 100% Charge Limit For LiquidSlugging

Sequence 200 On / Off Cycles At Each Window Corner 30Min / Cycle, Repeat Sequence 4 Times

Specific Tests Based On Field Data Recorder Input

Digital Solenoid Valve 40,000,000 Cycles

Compressor Reliability Test



Product Range



Cooling Heating

MDS030A/AR 8.5 9.5 Single Phase

MDS040A/AR 10.0 11.5 Single Phase

MDS050A/AR 12.5 13.5 Single / 3 Phase

MDS060A/AR 15.0 17.0 Single / 3 Phase

Capacity (kW)Power

SupplyModel Outlook

A SeriesMDS030~060A(AR)

MDS Product Range (Outdoor)



Cooling Heating

MDS080B/BR 24.5 26.0

MDS100B/BR 28.0 30.0

MDS120B/BR 32.5 34.0

MDS150B/BR 40.0 43.0 1840 X 1290 X 840

MDS180B/BR 47.5 50.0

MDS200B/BR 50.0 53.0

MDS220B/BR 55.0 58.0

MDS240B/BR 65.0 68.0

MDS260B/BR 70.0 75.0 1840 X 2290 X 840

MDS280B/BR 75.0 80.0

MDS300B/BR 80.0 85.0

MDS320B/BR 85.0 92.0

Capacity (kW) DimensionModel Outlook

1840 X 990 X 840

1840 X 1990 X 840

1840 X 2590 X 840

B SeriesMDS080~300B(BR)

MDS Product Range (Outdoor)



kBtu/h 8.5 9.6 12.3 19.1 22.2 30.7 38.2 47.8 56.0

kW 2.5 2.8 3.6 5.6 6.5 9.0 11.2 14.0 16.4

CCD-C

CKD-A

CKD-C

WMG-D

CED-C

CED-D

CED-E

Capacity

MDS Product Range (Indoor)



Product Features



Energy Saving

Digital Scroll system is 20% better in SEER compared

to normal inverter system

MDS Product Features

0

1

2

3

4

Digital

ScrollAverage

Japanese

InverterInverter

AC

IPLV

3.56 3.45

3.00

IPLVIntegrated Part Load Value (Measure Of Seasonal Efficiency)


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Digital Multi-System 10HP Test Data( As Per GB/T 188372002)

2

2.5

3

3.5

4

4.5

0 20 40 60 80 100

IPLV(C) = 3.56

IPLV(H) = 3.71

Test By China National Center For Quality Supervision And Test Of Electrical Appliances , June 2005

Capacity (%)

Cooling

Heating

COP (W/W)



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Cooling Mode IPLV C)=3.56

Heating Mode IPLV H)=3.71



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Energy saving

No inverter Conversion loss



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Excellent Electromagnetic Compatibility

MDS unit runs at a constant

speed throughout the operating

range, thus there is NEGLIGIBLEelectromagnetic interference.

This unique feature eliminates

the need for expensive

electromagnetic suppression

electronics required to ensureelectromagnetic compatibility.

19th

17th

13th

11st

5th

1 2 3 4 5Ampere

7th

Inverter EMC Regulation Digital Scroll System



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Simplicity = Reliability


Outdoor Board Power Supply IPMTypical Inverter Components

Power Module Capacitor Bank

MDS PCB Board


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Simple & Reliable

MDS systemInverter system

Lower Applied Cost

Better Reliability

Better Serviceability


S


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Capacity Range from 10% up to 100%

Stepless Control

Wide Capacity Range


MDS P d t F t


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Unloaded power consumption is only 10% of full loadpower

Capacity modulating range for Digital Scroll is 10%-

100%,

At low capacity (10%, 20%,30%,etc ), the compressordoes not need any hot-gas by-pass or on/off control

like multiple compressor system

Lower Power Consumption During Low Load Condition


MDS P d t F t


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-20 -10 0 10 20 30 40

InadequateHeating

InadequateCooling

Ambient Temperature (oC)

Heating Cooling

Compressor Output

Compressor

Cycling

(Inefficient)

Fixed Speed Systems Do Not Match Load Requirements

Comfortable Environment Control


MDS P d t F t


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MDS constantly matches Supply & Demand

Comfortable Environment Control


-20 -10 0 10 20 30 40

Capacity Matches Load

Energy Savings

High Comfort

Ambient Temperature (oC)

Compressor Output

Digital Scroll 10% - 100%

Heating Cooling

MDS P d t F t


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19

22

25

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31

19:19:12 19:26:24 19:33:36 19:40:48 19:48:00 19:55:12 20:02:24 20:09:36 20:16:48 20:24:00

Time

Room

AirTemp.

(C)

Bedroom OnDining Room OffLiving Room On

Bedroom

Set Temp 25C

Living Room

Set Temp 22C

Tight Temperature ControlIndividual EXV


MDS P d t F t


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Cost Saving

Based on a villa with 200m2of six rooms, 6 sets of (2hp) air-

conditioners are required.


MDS P d t F t


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Simultaneous Operating Factor (SOF)

4:00 8:00 12:00 16:00 20:00 24:00 4:00

Living Room2

Host Bedroom

Bedroom

Maximum 10 HP requirement

Time

Bedroom

Living Room1

Workroom

Cost Saving


MDS P d t F t


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Only 1 outdoor of MDS

with 6 indoors unit.

Less equipment cost

Better space utilization

Cost Saving


MDS P d t F t


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Long Piping Application

Maximum equivalentlength between outdoor

unit and indoor unit is 150

meters. (Longest branch)

The maximum heightbetween outdoor unit and

the lowest indoor unit is

50 meters.

The maximum height

between highest and

lowest indoor units is 15

meters


MDS Prod ct Feat res


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Flexible

One outdoor unit can connect up to maximum 16 units (MDS-A)indoor units and 48 units (MDS-B) indoor

Indoor unit has wide range of cap. max. up to 120% of outdoor

unit.




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Principle of Digital Compressor




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Qty HP Qty HP Qty HP

MDS030A 1 3MDS040A 1 4

MDS050A 1 5

MDS060A 1 6

MDS080B 1 4 1 4

MDS100B 1 5 1 5

MDS120B 1 6 1 6

MDS150B 1 5 2 5

MDS180B 1 6 2 6

MDS200B 1 5 3 5

MDS220B 1 6 3 5

MDS240B 1 6 3 6

MDS260B 1 6 1 6 3 5 MDS120B(R)M + MDS150B(R)S




-

-

-

-

-

-

-

-

-

Digital CompressorModel Remark

Fixed Compressor

--

-

Accumulated Running Time for fixed scroll compressor




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Compact Design

Outdoor unit has compact design. The small structureoccupy less space and is easy to move.




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Better Sound Quality

New fan blade design offer smooth air distribution thusreduces turbulent noise significantly.

Night Mode Outdoor unit will operate at lower fan

speed according to ambient temperature

Optional high static fan of 50Pa is available. (For short

ducting)




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Easier Oil Return

During the unloaded state, since there is no mass velocity ofrefrigerant, the oil does not leave the compressor.

So during a period of low modulation, when the unloaded time

is longer, very little oil leaves the compressor

Build in oil separator for MDS outdoor models

Other Features

Self Diagnosis for Outdoor and Indoor model. A set of error

codes is available.

Simple wiring to connect the outdoor and indoor model. Only a

twisted part of wire is required to link up the indoor and

outdoor.




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Testing Condition

Cooling - 27C DB / 19C WB Indoor and 35C DB / 24C WB

Heating - 20C DB / 15C WB Indoor and 7C DB / 6C WB




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Various Types of Controllers

Wireless HandsetWired Handsetwith wireless option

G11G7 SLM

for MDSAC5300

G12G8




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Central Control

MDS can be network up to 32 outdoor units Provision for system of : 32 x 48 units = 1536 units




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Status Monitoring Software

Control and monitor all indoors and outdoors

Specific units / grouping control

Scheduling

Self-diagnosis / Alarming




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Unit Selection Software




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Refrigerant Piping Connection

Refnet Joint & Distributors

Allow refrigerant to branch out

from the main pipe line

Factory supplied as kit

Selection of refnet joint &distributors base on the

downstream of indoor capacity

Reduce installation cost and time




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EXV Box

Electronic Expansion Valve Box

http://localhost/var/www/apps/conversion/tmp/scratch_1//192.168.16.117/mds240br%E6%95%B4%E6%94%B9/AIRCONDITIONER/TRAINING-PRODUCT/MDS/oversea/vrvII%20(functions).ppthttp://localhost/var/www/apps/conversion/tmp/scratch_1//192.168.16.117/mds240br%E6%95%B4%E6%94%B9/AIRCONDITIONER/TRAINING-PRODUCT/MDS/oversea/vrvII%20(functions).ppthttp://localhost/var/www/apps/conversion/tmp/scratch_1//192.168.16.117/mds240br%E6%95%B4%E6%94%B9/AIRCONDITIONER/TRAINING-PRODUCT/MDS/oversea/vrvII%20(functions).ppt


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MDS App l icat ion

MDS Application


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MDS Application

Consideration for using ADS Location for outdoor is limited.

MDS can be used due to the ability to couple multiple indoors

with only 1 outdoor. Better space utilization.

Various type of indoor unit with separate temperature

requirementMDS system can be couple with various type of indoors.

Each indoor can be design to supply to a specific area only

and the temperature setting is base on individual indoor

setting.

Heat load of the same air-conditioned area varies

MDS is able to match the indoor load requirement with its part

loading capability.

MDS Application


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MDS Application

Consideration for using MDS

Centralized Control

MDS outdoors and indoors can be linked together and control

using the MDS Control & Monitoring Software.

The software can also perform scheduling of the indoor units

base on the operating duration.

Places that require low or no EMC interference

The MDS modulation is control by mechanical parts. No

change in power supply (frequency or current), thus no EMC

interference.

MDS Application


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MDS Application


Building Type: Apartment / Bungalow

Building Type: Exhibition Hall

Temperature setting varies base on

different user

Outdoor location is limited

Indoor Capacity base on crowd

Centralized Control required.

MDS Application


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Building Type: Offices / Restaurant

Scheduling base on office hours /

peak hours as load determine by

crowd. Building exposed to sunlight

changes, causing load requirement

changes.

Required both centralized control

and individual temperature setting

EMC interference may


MDS Application


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Benef i ts o f MDS

Benefits of MDS


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Benefits of MDS

To Property Owner

Economical

Supply match indoor demand

Short Installation Time

Allow floor-to-floor installation.

High Adaptability

Various indoors models and long piping length.

Better Space Utilization

Less equipment is required. More space will be available

for owner to rent out.

Benefits of MDS


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To consultant and building designer

Flexibility in designing50 meters height - 15-story building.

15 meters between highest to the lowest indoors - 5

stories

Floor by Floor installation

50Pa ESP fan allow installation of short ducting.

Benefits of MDS

Benefits of MDS


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To consultant and building designer

Easy InstallationLess equipment.

Smaller and lighter piping.

A set of twisted pair wired.

Refnet joints

The refnet joints (with insulation) reduce the amount of

work involved in installation.

Benefits of MDS


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MDS versus o ther

centralized aircond it ion ing system

Understand MDS System


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Features of MDS

Energy efficient

Tight control with high comfort

Centralized air conditioning with zoning

capabilities

y

MDS competes natu ral ly

w i th ch i llers

What does MDS usually compete with?

Understand MDS System


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Can MDS replace Chillers?

Depends on application Process cooling

Clean room application (more than 2 parameters

to control)

How to introduce a MDS system?

Similar like a chiller system except that it usesrefrigerant rather than water, connected to ducted

and ductless fan coil unit easily.

y

MDS versus Chilled Water System


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Outline of the Systems


Pump

Pump

Coolingtower

Water piping

AHUFCU FCU

Forcooling

Forheating

2 heat sourcesManaged by

engineer

Complicated

Inefficient partload operation

Outdoorunit

indoorunit

Refrigerant piping

Space-conscious

design

Simple system

Energy efficient

Individual controlRemotecontroller

Simple Operation

hiller M S



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Central A/C System

System operate regardless of

occupying condition, only base

on time schedule.

MDS System

System operate base on

occupying condition as well

as time schedule


Operating Condition



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CHILLER SYSTEM

MDS SYSTEM

2 -off plant & pumps Standby not required.

P P

$$$$$

No standby equipment is necessary




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MDS SYSTEM

Lighter structural requirements

Lower height

Lower cost building

CHILLER SYSTEM

P P$$$$$

$$$$$

Lower building cost

y


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Job Reference

Prestige Job Reference


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Wei Xing Software Park, ChinaCommercial SectorOutdoor Quantity: 174 units

Indoor Type: Ceiling Concealed, and Ceiling Convertible

Indoor Quantity: 1151 units

Total Capacity: 7000 kW

g



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ShenZhen XiYuanOutdoor Quantity: 50 units

Indoor Type: Ceiling

Concealed



g



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Chendu Tian Fu

Software ParkOutdoor Quantity: 69 units

Indoor Type: Ceiling Concealed



g



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Oakwood Premier Cozmo, IndonesiaResidential Sector

Outdoor Quantity: 22 units




g



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Poh Teck Tung, ThailandCommercial SectorOutdoor Quantity: 7 units




g



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Zion Church, SingaporeCommercial SectorOutdoor Quantity: 13 units

Indoor Type: Ceiling Concealed, Ceiling Convertible and Ceiling Cassette



g



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DaTang Electrial Power

g

Prestige Job Reference in China


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Residential Area

TianJin BanJing Bay



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Office

GuangZhou Electric Power Institute


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Thank You

01 MDS Introduction

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