Installation; Engineering Installation Preparation And Notice; Installation Notice; Installation Key Points And Importance - Gree GMV-160WL/A-T Service Manual

INSTALLATION

1 Engineering Installation Preparation and
Notice

1.1 Installation notice

Personnel and property safety are highly concerned during the entire installation process.
Installation implementation must abide by relevant national safety regulations to ensure personnel and
property safety.
All personnel involved in the installation must attend safety education courses and pass
corresponding safety examinations before installation. Only qualified personnel can attend the
installation. Relevant personnel must be held responsible for any violation of the regulation.

1.2 Installation key points and importance

VRF air conditioning systems use refrigerant, instead of other agent, to directly evaporate to carry
out the system heat. High level of pipe cleanness and dryness is required in the system. Since various
pipes need to be prepared and laid out onsite, carelessness or maloperation during installation may
leave impurities, water, or dust inside refrigerant pipes. If the design fails to meet the requirement,
various problems may occur in the system or even lead to system breakdown.
Problems that usually occur during installation are as follows:
No. Installation Problem
Dust or impurities enter into the
1
refrigeration system.
Nitrogen is not filled into the refrigerant
2 pipe or insufficient Nitrogen is filled
before welding.
The vacuum degree in the refrigerant
3
pipe is insufficient.
Water enters into the refrigeration
4
The refrigerant pipe specifications do
5 not meet the configuration
6 Refrigerant pipe is blocked.
7 Refrigerant pipe exceeds the limit.
8 Incorrect amount of refrigerant is filled.
9 The refrigerant pipe leaks.
DC Inverter Multi VRF System II Service Manual
system.
requirements.
Possible Consequence
Pipes are more likely to be blocked; air conditioning performance
is reduced; compressor wear is increased or even hinder the
normal operation of the system and burn the compressor.
Pipes are more likely to be blocked; air conditioning performance
is reduced; compressor wear is increased or even hinder the
normal operation of the system and burn the compressor.
The refrigeration performance is reduced. The system fails to
keep normal operation due to frequent protection measures.
When the problem getting serious, compressor and other major
components can be damaged.
Copper plating may appear on the compressor and reduce the
compressor efficiency with abnormal noise generated; failures
may occur in the system due to ice plug.
Smaller configuration specifications can increase the system pipe
resistance and affect the cooling performance; larger
configuration specifications are waste of materials and can also
reduce the cooling performance.
The cooling performance is reduced; in certain cases, it may
cause long-term compressor operating under overheat
conditions; the lubricating effect can be affected and the
compressor may be burnt if impurities were mixed with the
The loss in pipe is considerable and the unit energy efficiency
decreases, which are harmful for long-term running of the
The system cannot correctly control the flow allocation; the
compressor may be operating under over-heating environment or
running when the refrigerant flows back to the compressor.
Insufficient refrigerant circulating in the system decreases the
cooling performance of the air conditioner. Long-term operation
under such circumstance may cause an overheating compressor
or even damage the compressor.
55
lubricating oil.
system.