Gree GMV5 Series Service Manual

GMV5 D.C INVERTER MULTI VRF SERVICE MANUAL
25
CHAPTER 2 INSTALLATION
1 ENGINEERING INSTALLATION PREPARATION
1.1 INSTALLATION SAFETY
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 IMPORTANCE OF INSTALLATION ENGINEERING
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.
7
Refrigerant pipe exceeds the limit.
The loss in pipe is considerable and the unit energy efficiency decreases,
which are harmful for long-term running of the system.
8
Incorrect amount of refrigerant is
filled.
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..
9
The refrigerant pipe leaks.
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.
10
Water drainage from the
condensate water pipe is not
smooth.
Residual water in IDUs can affect the normal operation of the system.
The possible water leakage can damage the IDU's decoration.

Gree GMV5 Series Specifications

General

Brand	Gree
Model	GMV5 Series
Category	Inverter
Language	English