Midea V4 Plus S Series Betriebsanleitung

3 phase, 380-415V, 50Hz

MDVS-252(8)W/DRN1

MDVS-280(10)W/DRN1

MDVS-335(12)W/DRN1

Model:

Technical Service Manual

V4 Plus

Water Cooled VRF

001 Part 1 General Information

010 Part 2 Selection Procedure

015 Part 3 Specifications & Performances

170 Part 4 Installation

198 Part 5 Troubleshooting

Contents

MCAC-VTSM-2016-04 R410A DC Inverter VRF V4 Plus W Series 50Hz

General Information 1

Part 1 General Information

1. V4+W VRF system introduction.............................................................2

2. Features ...................................................................................................2

3. Main units lineup.....................................................................................6

4. Indoor units lineup..................................................................................6

5. Nomenclature ..........................................................................................9

R410A DC Inverter VRF V4 Plus W Series 50Hz MCAC-VTSM-2016-04

2 General Information

1. V4+W VRF system introduction

Midea water source heat pump central air-conditioning system is a kind of VRF air-conditioning system which

uses water as the cold/heat source. In this system, water is transported from the cold/heat source to the main

unit through the water pipe, after the heat exchange between water and the refrigerant, main unit will send the

refrigerant to indoor units.

2. Features

2.1 Wide application range

2.1.1 Free combination, maximum capacity can be up to 36HP

The capacity range of main units is from 8HP to 36HP. Maximum 59 indoor units with capacity up to 130% of

total main units can be connected in one system.

2.1.2 Wide operation range

Main unit water inlet flow: 8HP (2.7~8.1m3/h); 10HP (3~9 m3/h); 12HP (3.6~10.8 m3/h).

2.1.3 Long piping length

Piping length

Permitted

value (m)

Actual total piping length

300

Longest piping

Actual length

120

Equivalent length

150

Equivalent piping length from the farthest indoor

unit to the first indoor branch joint

40/90*

Level difference between

indoor and outdoor units

Main unit up

Main unit down

Level difference between indoor units

Main unit ambient temperature: 0~40oC

Main unit water inlet temperature: 7~45oC

Indoor temperature in cooling mode: 17~32oC

Indoor temperature in heating mode: 15~30oC

*The allowable length extend to 90m should under certain conditions.

Please refer to the installation manual for details.

MCAC-VTSM-2016-04 R410A DC Inverter VRF V4 Plus W Series 50Hz

General Information 3

2.2 High efficiency

2.2.1 High efficiency DC inverter compressor

All series of 8HP, 10HP and 12HP adopt one DC inverter compressor each. With DC inverter compressors, V4

Plus W Series offers increases energy efficiency by 25%.

2.2.2 High efficiency double-pipe heat exchanger

With the innovative designed double-pipe heat exchange technology, the water quality required is low. The

water side has large circulation area, and it is not easy to get stuck, higher reliability, easy to clean and

maintenance.

2.2.3 Wide side heat recovery

In the modern large-scale buildings, the load between the internal and external areas is different. It may occur

situations that both cooling and heating are required. The V4 PLUS W series modular design, not only can

realize meticulous system division in different areas but also can realize heat recovery at the same time,

significantly improved energy efficiency.

New structure enhanced mid-frequency performance

Special designed scroll profile for R410A

More compact, weight reduced by 50%

Advanced permanent magnet DC motor improves

low-frequency band performance

R410A DC Inverter VRF V4 Plus W Series 50Hz MCAC-VTSM-2016-04

4 General Information

2.3 High reliability

2.3.1 Cycle duty operation

V4+W intelligent control, according to the system load, cyclically changes start-up sequence of multiple main

units, equalizes compressor duty and extends operation life-span.

Note: Everytime after oil-returning/defrosting or restart, main unit will start in different sequence.

2.3.2 Backup operation

In a multiple system, if one module is failed, other modules can be backup instead of the failed one for

continuing operation.

2.3.3 No effect of climate on the operation

Due to the stable source of water as the cold/heat source of the system, both in cold winter and hot summer,

air conditioning capacity won't be influenced by the environmental temperature. Especially when heating in

winter, the unit does not exist frost/defrost process, making the heating effect more stable and strong.

2.3.4 No water leakage

No water piping is installed in the indoor area for eliminating leakage risks.

MCAC-VTSM-2016-04 R410A DC Inverter VRF V4 Plus W Series 50Hz

General Information 5

2.4 Enhanced comfort

2.4.1 Low noise

Without outdoor units fan noise and fully enclosed design which realize lower noise.

2.5 Easy installation and service

2.5.1 Compact and lightweight

8,10,12HP three basic model with the same size and weight: W780mm×H1000mm×D550mm, 146kg.

It can be transported through the elevator or forklift.

More compact, can also be installed in the narrow space of the engine room.

2.5.2 Modular design

Modular design, one main unit can be installed above another one and greatly saved installation space.

Various installation environment: Storehouse, basement, close balcony, corridor, plant room and so on.

2.5.3 Auto addressing

Outdoor unit can distribute address for each indoor unit automatically.

Wireless and wired controllers can enquire and modify each indoor unit’s address.

2.5.4 Simple signal line connection

Installation is easier as communication wiring can be shared by indoor & outdoor units. It’s easy for the user to

retrofit the existing system with a centralized control by simply connecting to the outdoor units.

PQE & XYE: only one set of PQE communication wires can achieve communication among indoor units,

outdoor units and the network.

Reversible communication, central controller can be connected from indoor side or outdoor side as you

wish.

R410A DC Inverter VRF V4 Plus W Series 50Hz MCAC-VTSM-2016-04

6 General Information

3. Main units lineup

8, 10, 12 HP

16 ,18 ,20, 22, 24 HP

26, 28, 30, 32, 34, 36 HP

Main unit combinations

Capacity

Model

Recommend combination

Max. indoor

units nos.

(HP)

8(HP)

10(HP)

12(HP)

MDVS-252(8)W/DRN1



MDVS-280(10)W/DRN1



MDVS-335(12)W/DRN1



MDVS-504(16)W/DRN1



MDVS-532(18)W/DRN1



MDVS-560(20)W/DRN1



MDVS-615(22)W/DRN1



MDVS-670(24)W/DRN1





MDVS-784(26)W/DRN1





MDVS-812(28)W/DRN1





MDVS-840(30)W/DRN1



MDVS-895(32)W/DRN1





MDVS-950(34)W/DRN1





MDVS-1005(36)W/DRN1





4. Indoor units lineup

Capacity

Cassette unit

MCAC-VTSM-2016-04 R410A DC Inverter VRF V4 Plus W Series 50Hz

General Information 7

(×100W)

One-way cassette

Two-way cassette

Compact four-way

cassette

Four-way cassette &

Four-way cassette

silent type

100

112

140

Capacity

(×100W)

Duct unit

Low static

pressure duct

A5 duct

High static pressure duct

112

140

160

200

250

280

400

450

560

Indoor units lineup

Capacity

Floor-standing/Ceiling & Floor/Console

R410A DC Inverter VRF V4 Plus W Series 50Hz MCAC-VTSM-2016-04

8 General Information

(×100W)

Cased floor-standing

Uncased floor-standing

Ceiling & floor

console

112

140

160

Capacity

(×100W)

Wall mounted/Fresh air processing unit

Wall mounted

(S panel)

Wall mounted

(M panel)

Wall mounted

(R panel)

Fresh air processing unit

125

140

200

250

280

Note:

Due to continuous improvement, specifications are subject to change without prior notice.

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