Installation; Engineering Installation Preparation And Notice - Gree GMV-36WL/A-T(U) Manual

DC Inverter Side Discharge VRF Ⅱ for North America

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
system.
The refrigerant pipe specifications do
5 not meet the configuration
requirements.
6 Refrigerant pipe is blocked.
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
lubricating oil.
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