Metro DataVac MHC-AC24KWH Owner's Manual

Dc inverter multi vrf system

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O O w w n n e e r r ' ' s s M M a a n n u u a a l l

Original Instructions

DC Inverter Multi VRF System

Models

MHC-AC24KWH

Thank you for choosing this product. Please read this

Owner'sManual carefully before operation and retain it

for future reference.

If you have lost the Owner's Manual, please contact the

local agentor visit www.metroheatingcooling.com.au or

send an email to david@metroheatingcooling.com.au

forthe electronic version.

Metro Heating & Cooling

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Page 1 O O w w n n e e r r ' ' s s M M a a n n u u a a l l Original Instructions DC Inverter Multi VRF System Models MHC-AC24KWH Thank you for choosing this product. Please read this Owner'sManual carefully before operation and retain it for future reference.
Page 2 To Users Thank you for selecting Gree product. Please read this instruction manual carefully before installing and using the product, so as to master and correctly use the product. In order to guide you to correctly install and use our product and achieve expected operating effect, we hereby instruct as below: (1) This appliance can be used by children aged from 8 years and above and persons with reduced physical, sensory or mental capabilities or lack of experience and knowledge if they...
Page 3 Exception Clauses Manufacturer will bear no responsibilities when personal injury or property loss is caused by the following reasons: (1) Damage the product due to improper use or misuse of the product. (2) Alter, change, maintain or use the product with other equipment without abiding by the instruction manual of manufacturer.
Page 4: Table Of Contents
Contents 1 Safety Notices (Please Be Sure to Abide them) ............1 2 Product Introduction ..................... 3 2.1 Names of Main Parts ......................4 2.2 Combinations of Indoor and Outdoor Units ............... 4 2.3 Operating Range ......................4 2.4 Comfort Function ......................4 3 Preparation before Installation ..................
Page 5: Safety Notices (Please Be Sure To Abide Them)
DC Inverter Multi VRF System 1 Safety Notices (Please Be Sure to Abide them) WARNING: If not abide them strictly, it may cause severe damage to the unit or the people. NOTICE: If not abide them strictly, it may cause slight or medium damage to the unit or the people.
Page 6 DC Inverter Multi VRF System Diameter of power cord When the power cord is should be large enough. The connected, please fix the damaged power cord and electric box cover properly to connection wire must be avoid safety accidents. replaced with special cables. Never fail to comply with the Never short circuit or cancel nitrogen-charging welding...
Page 7: Product Introduction
DC Inverter Multi VRF System Put through the power 8 hours in advance before operation. Do not expose the air Do not cut off the power when conditioner to the moist or the air conditioner stops corrosive environment. operation for only about one night (protect the compressor).
Page 8: Names Of Main Parts
(2) The total capacity of indoor units should be within 50%~135% of that of the outdoor unit. Model Max sets of connectable IDUs MHC-AC24KWH (3) Can be connected to various indoor units. When any one of the indoor units receives operating command, outdoor unit will start operation as per required capacity. When all indoor units stop, outdoor unit will be shut off.
Page 9: Preparation Before Installation
DC Inverter Multi VRF System auto cleaning function every three months. If the indoor humidity is too low, it will affect the auto cleaning performance. It is recommended to use auto cleaning function when outdoor ambient temperature is 10°C-40°C. If outdoor temperature is out of this range, the unit will exit auto cleaning earlier, which is a normal phenomenon.
Page 10: Installation Site
DC Inverter Multi VRF System 3.2 Installation Site (1) Select a location which is strong enough to hold unit’s weight so that unit can stand still and erect. (2) The installation position should withstand strong wind, typhoon and earthquake. The unit must be installed stably.
Page 11: Installation Instruction
NOTE! Graphics here are only for reference. Please refer to actual products. Unspecified dimensions are all in mm. 4.1 Dimension of Outdoor Unit and Mounting Hole Unit Outline and Installation Dimension(mm). Fig.3 Unit: mm Model MHC-AC24KWH 1345 4.2 Connection Pipe 4.2.1 Schematic Diagram of Piping Connection Fig.4...
Page 12 Y type branch joint is adopted to connect indoor and outdoor units. Connecting method is shown in the figure below: NOTE! Equivalent length of one Y-type branch is 0.5m. Fig.5 Allowable Length and Height Difference of Connection Pipe Piping parameters of MHC-AC24KWH — Allowable value Fitting pipe...
Page 13 Dimension of outdoor connection pipe. Pipe dimension Basic module Gas pipe (mm) Liquid pipe (mm) MHC-AC24KWH Φ19.05 Φ9.52 4.2.4 Selection of Indoor Branches Select indoor branches according to the total capacity of downstream indoor units. If the capacity exceeds that of the outdoor unit, capacity of outdoor unit prevails.
Page 14: Installation Of Connection Pipe
DC Inverter Multi VRF System 4.2.5 Dimension of Pipe between Indoor Branches Select pipe between indoor branches according to the capacity of downstream indoor units; if the capacity exceeds that of the outdoor unit, capacity of outdoor unit prevails. Fig. 8 Total capacity of downstream indoor units C (kW) Gas pipe (mm) Liquid pipe (mm)
Page 15 DC Inverter Multi VRF System requirements for welding process. Rosin joint or pin hole is not allowed. (3) Radius of bending parts should be over 200mm. Note that pipes cannot be repeatedly bent or stretched; otherwise the material will get harder. Do not bend or stretch the pipe for more than 3 times at the same position.
Page 16 During engineering installation, the connection pipe inside the unit must be wrapped by insulation sleeve. Below is the piping diagram of MHC-AC24KWH.According to customer requirement or space limit, outlet pipe can be installed from the front, right or rear side.
Page 17 DC Inverter Multi VRF System (3) Y-type branch must be installed vertically or horizontally. Fig. 16 (4) Branch shall be isolated by insulating material that can bear 120° or even higher temperature. The attached foam of branch cannot be taken as insulating material. 4.3.7 Thermal Insulation for Pipeline (1) For multi VRF system, every copper pipe should be labeled so as to avoid misconnection.
Page 18: Vacuum Pumping, Refrigerant Adding
DC Inverter Multi VRF System the rape too tight, otherwise the insulation effect will be weakened. After wrapping the pipe, apply sealing material to completely seal the hole on the wall. 4.3.8 Support and Protection of Pipeline (1) Support should be made for hanging connection pipe. Distance between each support cannot be over 1m.
Page 19: Additional Refrigerant Charging
DC Inverter Multi VRF System (3) Use vacuum pump to withdraw the air inside indoor unit and connection pipe from the outdoor valve, as shown below. Fig. 18 4.4.2 Additional Refrigerant Charging (1) Calculation of Additional Refrigerant Charge Additional refrigerant charge (R) = pipeline additional refrigerant charge (A) + outdoor unit additional refrigerant charge (B) Calculation of pipeline additional refrigerant charge (A) Pipeline additional refrigerant charge (A) = liquid pipe length ( ) ×...
Page 20 DC Inverter Multi VRF System Calculation example Take 16kW model as example: Fig. 19 IDU: Capacity 7.1kW 5.0kW 3.6kW 2.5kW Liquid pipe: Pipe diameter (mm) Length (m) Pipe diameter (mm) Length (m) Total length of liquid pipes: A+B+C+a=15+8+7+3=33m Therefore, additional refrigerant charge =33×0.054+11×0.022+0.6=2.624kg...
Page 21: Wiring Diagram
Please refer to the circuit diagram for wiring. (2) Selection of circuit breaker and power cord. Circuit breaker Number of ground wire× Number of power cord Model Power supply capacity Min sectional area × Min sectional area 220-240V ~ 50Hz MHC-AC24KWH 1×6.0 2×6.0...
Page 22 DC Inverter Multi VRF System NOTES: Specification of circuit breaker is based on the working condition where ambient temperature of circuit breaker is 40°C. If working condition changes, please adjust the specification according to national standard. Supply cords of parts of appliances for outdoor use shall not be lighter than polychloroprene sheathed flexible cord (code designation 60245 IEC 57).
Page 23: Check Items After Installation And Test Operation
DC Inverter Multi VRF System (4) Engineering Wiring of Power Supply and Communication Cable Please refer to the following part for wiring. Connect the power cord and communication cord to the corresponding wiring board and grounding screws according to the circuit diagram.
Page 24 DC Inverter Multi VRF System Test run and debugging must be conducted by professionals or under the guide of professionals. 5.2.1 Preparation for Test Run and Debugging (1) Power supply cannot be connected before all the installation works are done. (2) All control circuits and wires are correctly and securely connected.
Page 25 DC Inverter Multi VRF System Instructions for Different Debugging Stages — Debugging Code Code Meaning and Operating Methods Progress Display Display Code Status “n” displays the quantity of indoor units identified by the system. The displayed quantity may be different from the actual quantity. Please check personally.
Page 26 DC Inverter Multi VRF System Instructions for Different Debugging Stages — Debugging Code Code Meaning and Operating Methods Progress Display Display Code Status The compressor is not sufficiently preheated. The nixie tube will keep displaying as shown on the left until the preheating time of the compressor reaches 8 hours.
Page 27 DC Inverter Multi VRF System 5.2.3 Appendix: Reference of Normal Operation Parameters Debug item Parameter name Unit Reference Outdoor °C — temperature When compressor starts, discharge temp in cool mode is within 70°C~105°C and at least 10°C higher than the high Compressor °C pressure saturation temp.
Page 28: Common Malfunctions And Troubleshooting
DC Inverter Multi VRF System Debug item Parameter name Unit Reference Compressor and indoor/outdoor fan motor do not have Others — — strange noise. Unit can operate normally. 6 Common Malfunctions and Troubleshooting WARNING: If an abnormal situation (such as peculiar smell) occurs, please stop the operation immediately and turn off the main power supply, and then contact Gree authorized maintenance center.
Page 29 DC Inverter Multi VRF System Phenomenon Causes When the power supply is It is the sound of startup action of electronic connected, there is small expansion valve. “ dada ” sound. When the system is conducting This is the sound of refrigerant flowing inside the cooling or defrosting, there is unit.
Page 30: Error Indication
DC Inverter Multi VRF System Phenomenon Causes When the selected operation mode of the indoor unit conflicts with the operation mode of the outdoor unit, after five seconds, the indoor unit error indicator flashes or the remote controller displays Cooling or heating mode the operation conflict, and the indoor unit shuts Mode conflict cannot start up...
Page 31 DC Inverter Multi VRF System Error Code Content Error Code Content Malfunction of inlet tube temperature High pressure ratio protection of system sensor of vapor liquid separator Malfunction of exit tube temperature Low pressure ratio protection of system sensor of vapor liquid separator Malfunction of gas temperature sensor of Protection because of abnormal pressure heat exchanger...
Page 32: Maintenance And Care
DC Inverter Multi VRF System Error Code Content Error Code Content Communication malfunction between IDU, Communication malfunction between ODU and IDU ’ s wired controller IDU and the receiving lamp plate Communication malfunction between main Overflow distribution of IP address control and inverter compressor driver Communication malfunction between main —...
Page 33: Maintenance After Seasonal Use
DC Inverter Multi VRF System operation starts so as to preheat the outdoor compressor. (6) Check whether outdoor unit is securely installed. If there is any problem, please contact Gree authorized service center. 8.4 Maintenance after Seasonal Use (1) Disconnect power of the entire system. (2) Clean the air filter and outer case of indoor and outdoor units.
Page 34 Metro Heating & Cooling Add:42/31-37 Norcal Road Nunawading VIC 3131 Tel: 0413 728 410 E-mail: david@metroheatingcooling.com.au...