Engineering Installation Preparation And Notice; Installation Key Points And Importance - Gree FGR25Pd/DNa-X Service Manual

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

The system 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 pipe or insufficient
2
Nitrogen is filled before welding.
The vacuum degree in the
3
refrigerant pipe is insufficient.
Water enters
4
the refrigeration
system.
The refrigerant pipe
specifications do not meet the
5
configuration requirements.
Refrigerant pipe is blocked.
6
Refrigerant pipe exceeds the
7
limit.
Incorrect amount of refrigerant is
8
filled.
The refrigerant pipe leaks.
9
Water drainage from the
condensate water pipe is not
10
smooth.
The ratio of slop for condensate
water pipe is insufficient or the
11
condensate water pipe is
incorrectly connected.
The air channel is improperly
12
fixed.
The guide vane of air channel is
13
not reasonably manufactured.
Duct type split Air conditioner Inverter Series
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
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
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
into
efficiency with abnormal noise generated; failures may occur in the system due to
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
The system cannot correctly control the flow allocation; the compressor may be
operating under over-heating environment or running when the refrigerant flows
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.
Residual water in IDUs can affect the normal operation of the system. The
possible water leakage can damage the IDU's decoration.
Reverse slop or inconsistent connection of condensate water pipe can hinder the
The air channel will deform; vibration and noise occur during unit operating.
Uneven air quantity allocation reduces the overall performance of the air
Possible Consequence
and burn the compressor.
and burn the compressor.
ice plug.
lubricating oil.
are harmful for long-term running of the system.
back to the compressor.
smooth drainage and cause leakage of the IDU.
conditioner.
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