Midea ATOM B Series User manual



Model:

B Series

MDV‐V28WDHN1(AtB)

MDV‐V36WDHN1(AtB)

MDV‐V42WDHN1(AtB)

MDV‐V48WDHN1(AtB)

MDV‐V56WDHN1(AtB)

MDV‐V60WDHN1(AtB)

CommercialAirConditioners

R410A

Service

Manual



AtomBSeriesVRF50/60Hz

1

CONTENTS



CONTENTS



Part 1 General Information............................................................................3

Part 2 Component Layout and Refrigerant Circuits.....................................7

Part 3 Control...............................................................................................15

Part 4 Field Settings.....................................................................................23

Part 5 Electrical Components and Wiring Diagrams..................................32

Part 6 Diagnosis and Troubleshooting.........................................................45



AtomBSeriesVRF50/60Hz  

2  

MideaAtomBSeriesServiceManual



Atom B Series VRF 50/60Hz

Part 1 – General Information

Part 1

General Information

1 Indoor and Outdoor Unit Capacities........................................................... 4

2 External Appearance.................................................................................. 5

3 Combination Ratio..................................................................................... 6

Atom B Series VRF 50/60Hz

Midea Atom B Series Service Manual

1Indoor and Outdoor Unit Capacities

1.1 Indoor Units

Table 1-1.1: Indoor unit abbreviation codes

Abbreviation code

Type

One-way Cassette

Q4C

Compact Four-way Cassette

Four-way Cassette

High Static Pressure Duct

Medium Static Pressure Duct

Wall-mounted

Ceiling and Floor

Table 1-1.2: Indoor unit capacity range

Capacity

index

Q4C

T2(Arc)

kBtu/h

1.5

0.5

—

1.8

0.6

—

2.2

0.8

—

2.8

—

3.6

1.25

—

4.5

1.6

—

5.6

—

7.1

2.5

—

8.0

—

9.0

3.2

—

10.0

3.6

—

11.2

—

14.0

—

16.0

—

56(DC)

—

Notes:

1. Atom series indoor units could connect to Atom series outdoor units.

1.2 Outdoor Units

Table 1-1.3: Outdoor unit capacity range

Capacity (kBtu/h)

Model Name

MDV-V28WDHN1(AtB)

MDV-V36WDHN1(AtB)

MDV-V42WDHN1(AtB)

MDV-V48WDHN1(AtB)

MDV-V56WDHN1(AtB)

MDV-V60WDHN1(AtB)

Notes:

1. Atom series outdoor units could not be combined.

Atom B Series VRF 50/60Hz

Part 1 – General Information

2External Appearance

2.1 Indoor Units

Table 1-2.1: Indoor unit appearance

One-way Cassette

Four-way Cassette

Compact Four-way Cassette

Wall-mounted

Q4C

High Static Pressure Duct

Medium Static Pressure Duct

Medium Static Pressure Duct (Arc Series Duct)

Ceiling and Floor

2.2 Outdoor Units

Table 1-2.2: Outdoor unit appearance

28kBtu/h

36/42/48/56kBtu/h

60kBtu/h

Atom B Series VRF 50/60Hz

Midea Atom B Series Service Manual

3Combination Ratio

Table 1-3.1: Indoor and outdoor unit combination ratio limitations

Type

Minimum combination ratio

Maximum combination ratio

Atom Series outdoor units

45%

130%

Table 1-3.2: Combinations of Indoor and outdoor units

Outdoor unit capacity

Sum of capacity indexes of

connected indoor units (standard

indoor units only)

Number of connected

indoor units

kBtu/h

Capacity

index

12.6 to 36.4

1-4

16.2 to 46.8

1-6

18.9 to 54.6

1-7

21.6 to 62.4

1-8

25.2 to 72.8

1-9

27.0 to 78.0

1-9

Combination ratio =

Sum of capacity indexes of the indoor units

Capacity index of the outdoor unit

‐i   AtomBSeriesVRF50/60Hz

7

Part2–ComponentLayoutandRefrigerantCircuits

Part2

ComponentLayoutand

RefrigerantCircuits



1PipingDiagrams.........................................................................................8

2RefrigerantFlowDiagrams.......................................................................11





AtomBSeriesVRF50/60Hz  

8  

MideaAtomBSeriesServiceManual

1 PipingDiagrams

Figure2‐1.1:28modelpipingdiagram



Figure2‐1.2:36modelpipingdiagram



Oil

return

hole

Temperature

sensor

Distributor

Liquid pipe

Temperature

sensor

4 way valve

Gas pipe

Compressor

Temperature

sensor

Low pressure switch

Accumulator

Refrigerant

radiator

module

Temperature

sensor

Filter

Oil return capiliary

Oil seperator

DC motor

Silencer

High pressure switch

Temperature

sensor

Distributor

Liquid pipe

Temperature

sensor

4 way valve

DC motor

Gas pipe

Compressor

Temperature

sensor

Low pressure switch

ccumulator

Refrigerant

radiator

module

Temperature

sensor

Filter

Oil return capiliary

Oil sepetator

‐i   AtomBSeriesVRF50/60Hz

9

Part2–ComponentLayoutandRefrigerantCircuits

Figure2‐1.3:42modelpipingdiagram



Figure2‐1.3:48/56modelpipingdiagram







High pressure

switch

Temperature

sensor

Distributor

Liquid pipe

Temperature

sensor

4 way valve

DC motor

Gas pipe

Compressor

Temperature

sensor

Low pressure switch

Accumulator

Refrigerant

radiator

module

Temperature sensor

Oil return capiliary

Oil seperator

Filter

Electronic

expansion

valve



High pressure

switch

Temperature

sensor

Distributor

Liquid pipe

Temperature

sensor

4 way valve

DC motor

Gas pipe

Compressor

Temperature

sensor

Low pressure switch

Accumulator

Refrigerant

radiator

module

Temperature sensor

Oil return capiliary

Oil seperator

Filter

Electronic

expansion

valve

This manual suits for next models

Table of contents

Other Midea Air Conditioner manuals

Midea

Midea MSE-07CR User manual

Midea

Midea MDV-D22Q1/N1-D User manual

Midea

Midea M thermal Mono Series Dimension Guide

Midea

Midea MAC-450CR User manual

Midea

Midea MPPD30C User manual

Midea

Midea MSG-05CR User manual

Midea

Midea MSY-09HRDN1-QC8 User manual

Midea

Midea Inverter Split-type Room Air Conditioner User manual

Midea

Midea MWF09HB4 Repair manual

Midea

Midea CR034-RG36F Use and maintenance manual

Midea

Midea Blanc Series Operating and maintenance instructions

Midea

Midea MPPD33H Repair manual

Midea

Midea mcd-24hrdn1 User manual

Midea

Midea V8 Series User manual

Midea

Midea M2OA User manual

Midea

Midea VRF Operating manual

Midea

Midea MAP User manual

Midea

Midea M2OC-18HRDN1-M User manual

Midea

Midea MUE-18HRFNX-QRD0 User manual

Midea

Midea Kids Star Series User manual

Midea

Midea MUE-18HRFN1-QRDO User manual

Midea

Midea MAW08V1QWT User manual

Midea

Midea MAC-107AR User manual

Midea

Midea MFA-18HRDN1-Q User manual

Popular Air Conditioner manuals by other brands

Spheros

Spheros CC 355 instructions

Bosch

Bosch Climate 5000 SCI 24 CAS/ OU- OUE owner's manual

Panasonic

Panasonic CS-E12HKEW operating instructions

nedis

nedis ACMB1WT7 quick start guide

Samsung

Samsung AR KV Series User & installation manual

Daikin

Daikin FCFV50A Operation manual

Fujitsu

Fujitsu Inverter ASBA30JFC operating manual

Toshiba

Toshiba RAS-M10SMUV-E installation manual

Daikin

Daikin FXLQ20MAVE Operation manual

Hitachi

Hitachi RAS-E24CAK instruction manual

CIAT

CIAT Magister 2 Series Installation, Operation, Commissioning, Maintenance

Bestron

Bestron AAC6000 instruction manual

Hisense

Hisense 7K Use and Installation Instructions

Frigidaire

Frigidaire FFRE0533S1E0 Use & care guide

Samsung

Samsung AS09HM3N user manual

Frigidaire

Frigidaire CRA073PU11 use & care

Soleus Air

Soleus Air GB-PAC-08E4 operating instructions

McQuay

McQuay MCK020A Technical manual