Chapter 3 Commissioning Operation; Part 1 Security Requirements; Precautions For Construction; Precautions For The Use Of Refrigerants - Gree Ultra Heat GMV Multi VRF Heat Recovery Series Service Manual

Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial

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.
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COMMISSIONING OPERATION