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Midea MGCSL-D30W/RN1 - User Manual

Midea MGCSL-D30W/RN1
174 pages
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Air-cooled modular chiller unit 50Hz MCAC-ATSM-2011-12
2
Content
1 General information ................................................................................ 3
2. Features ................................................................................................... 5
3. Specification ........................................................................................... 9
4 Dimension .............................................................................................. 21
5 Refrigeration system drawing .............................................................. 33
6. Piping diagram ...................................................................................... 36
7 Wiring diagrams..................................................................................... 42
8 Electric characteristics ......................................................................... 56
9 Capacity tables ...................................................................................... 58
10 Exploded view ...................................................................................... 74
11 Troubleshooting ................................................................................... 96
12 Installation .......................................................................................... 108
13 Commissioning .................................................................................. 132
14 Maintenance ....................................................................................... 135
15 Control system .................................................................................. 137
Appendix ................................................................................................. 174

Questions and Answers

  • C
    Clifford ThomasAug 20, 2025
    How to fix over high air discharge pressure in Midea Chiller (Cooling operation)?
    • D
      David MorganAug 20, 2025
      High air discharge pressure during cooling can stem from several issues. It could be due to air or non-condensing gas in the system, requiring you to discharge the gas and re-vacuum if needed. Dirty condenser fins or obstructions can also cause this, so clean the fins. Inspect the condenser fan for errors and ensure sufficient chilling air volume. Also, check if the ambient temperature is too high. Finally, if the refrigerant charging volume is excessive, discharge the extra refrigerant. If the air suction pressure is excessive high, refer to the section addressing that specific issue.
  • I
    ihodgeAug 22, 2025
    What to do if my Midea MGCSL-D30W/RN1 Chiller compressor stops because of motor Overload?
    • S
      Stephanie KennedyAug 22, 2025
      If the compressor stops due to motor overload, the issue might be high air expelling and suction pressure (refer to those sections), voltage problems (ensure voltage isn't 20V above or below rated), a motor short circuit (check motor resistor connections), or an overload assembly error (replace the assembly).
  • M
    Margaret MaysAug 25, 2025
    What causes a Midea MGCSL-D30W/RN1 Chiller compressor to stop due to freeze-proof protection (Cooling operation)?
    • M
      Michael OrtizAug 25, 2025
      The compressor might stop due to freeze-proof protection because of insufficient chilling water flow (check/repair the pump or flow control), gas in the water loop (discharge the air), or a thermal resistor error (replace it if confirmed).
  • D
    David HollowayAug 26, 2025
    What causes over low air suction pressure in Midea MGCSL-D30W/RN1 (Cooling operation)?
    • D
      David GrahamAug 27, 2025
      Low air suction pressure can occur due to several reasons: insufficient water flow (adjust flow based on temperature difference), low inlet chilled-water temperature (check installation), refrigerant leaks or insufficient refrigerant (find and repair leaks or recharge), or scaling in the evaporator (descale).
  • J
    John JonesAug 28, 2025
    Why is the air suction pressure over high in my Midea MGCSL-D30W/RN1 Chiller (Cooling operation)?
    • J
      James HickmanAug 28, 2025
      High air suction pressure in cooling mode can result from overcharged refrigerant (discharge excess) or high inlet chilled-water temperature (check water pipeline insulation).
  • M
    Mrs. Mindy LeeAug 30, 2025
    Why is the air suction pressure over high in my Midea Chiller (Heating operation)?
    • J
      johnhunterAug 30, 2025
      Excessive air suction pressure during heating can be due to overheated air at the air heat exchanger (check ambient temperature) or overcharging of refrigerant (discharge the excess).
  • T
    teresa36Aug 31, 2025
    What causes a Midea MGCSL-D30W/RN1 Chiller compressor to stop due to Hi-pressure protection?
    • M
      Meghan HartmanSep 1, 2025
      If the compressor stops because of high-pressure protection, it could be due to over high air expelling pressure (refer to that section) or a faulty high-pressure switch (replace if defective).
  • J
    Jeffrey LeeSep 2, 2025
    How to fix over high air discharge pressure in Midea MGCSL-D30W/RN1 Chiller (Heating operation)?
    • K
      Kimberly ChanSep 2, 2025
      High air discharge pressure during heating can be caused by insufficient water flow (adjust based on temperature difference), air or non-condensing gas in the system (discharge gas and re-vacuum if needed), scaling in the heat exchanger (descale), or high chilling water inlet temperature (check water temperature). If the air suction pressure is excessive high, refer to the section addressing that specific issue.
  • H
    Holly WalterSep 4, 2025
    What causes a Midea MGCSL-D30W/RN1 compressor to stop because of Lo-pressure protection?
    • D
      David RitterSep 4, 2025
      If the compressor stops due to low-pressure protection, it could be a blocked filter in front or rear of the expanding valve (replace the filter), a faulty low-voltage switch (replace it), or excessive low air suction pressure (refer to that section).
  • K
    Kevin JohnsonSep 6, 2025
    How to fix over low air discharge pressure in Midea MGCSL-D30W/RN1 Chiller (Cooling operation)?
    • A
      adrian97Sep 6, 2025
      Low air discharge pressure during cooling operation might be caused by a low surrounding temperature (measure the temperature) or a refrigerant leak or insufficient refrigerant (find the leak and recharge). If the suction pressure is low, refer to the “low suction pressure” section.

Summary

3. Specification

Model MGB-F25 W;RN1 MGB-F30 W;RN1

Cooling Capacity

Heating Capacity

8 Electric Characteristics

Model

Lists chiller models with their electrical characteristics.

9 Capacity Tables

9.1 MGB-F(D)25 W;RN1 Cooling:

Presents cooling capacity and power data based on water outlet and ambient temperatures.

Heating:

Presents heating capacity and power data based on water outlet and ambient temperatures.

11 Troubleshooting

11.1 Failure & Protection Codes of the Module

Lists fault codes and their corresponding troubles for the chiller module.

12 Installation

12.1 Unit Installation

Provides instructions for installing the chiller unit.

12.1.1 Transportation

12.1.2 Installation space

Specifies the required clearance and arrangement space for unit installation.

12.1.3 Installation Foundation

Describes the requirements for the installation foundation and mounting.

13 Commissioning

1. Preparation

Outlines the necessary preparations before starting the commissioning process.

2. Test run

Details the steps for conducting a trial run and initial setup of the unit.

14 Maintenance

Maintenance for main components

Provides general guidelines for maintaining the chiller's key components.

Removing scale

Refrigeration system

15 Control System

15.1 PCB Outline and Description

Shows the layout and describes the components of the main control board.

15.1.2 25;30 kw module components description

Midea MGCSL-D30W/RN1 Specifications

General IconGeneral
BrandMidea
ModelMGCSL-D30W/RN1
CategoryChiller
LanguageEnglish

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