Gree Ultra Heat GMV-V72W/A-F, Service Manual

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Ultra Heat GMV VRF Technical Service Manual COMMISSIONING OPERATION
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CHAPTER 3 COMMISSIONING OPERATION
PART 1 SECURITY REQUIREMENTS
1 PRECAUTIONS FOR CONSTRUCTION

All commissioning and maintenance personnel must learn and strictly comply with construction
security specifications. Security measures must be taken especially for outdoor operations.

Workers of special types of labor, such as refrigerating engineers, electricians, and welders, must
have professional certificates. No worker is allowed to do another type of labor.

The equipment must be powered off before relevant operations, and other security requirements
should be strictly complied with.

All installation and maintenance operations must comply with design requirements of this product and
national and local security operation requirements. Rule-breaking operations are prohibited.
2 PRECAUTIONS FOR THE USE OF REFRIGERANTS
The Ultra Heat GMV serial unit is a refrigerating system of R410A working substances. Pay
attention to the following points:

The refrigerating system of R410A working substances has a higher working pressure than that of R22
working substances. The working pressure of the former is 1.6 times than that of the latter.

The refrigerating system of R410A working substances uses thicker-walled copper tubes than that of
R22 working substances. Adopt copper tubes with appropriate wall thickness.

R410A working substances are azeotropic mixture working substances. Refrigerants must be
appended in the form of liquid.
3 FUNCTION SETTINGS OF ODUS
Function application of ODUs consists of function DIP switch settings and function button settings,
including special engineering requirements.