Gree GMV-36WL/A-T(U), Manual

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DC Inverter Side Discharge VRF
Ⅱ
for North America
65
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 Possible Consequence
1
Dust or impurities enter into the
refrigeration system.
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.
2
Nitrogen is not filled into the refrigerant
pipe or insufficient Nitrogen is filled
before welding.
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.
3
The vacuum degree in the refrigerant
pipe is insufficient.
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.
4
Water enters into the refrigeration
system.
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.
5
The refrigerant pipe specifications do
not meet the configuration
requirements.
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.
6 Refrigerant pipe is blocked.
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.