0 53 INSTALLATION
GMV5 COMPACT MULTI VRF UNIT
SERVICE MANUAL
3 INSTALLATION MATERIALS SELECTION
The materials, equipment and instruments used during air conditioning engineering construction must have
certifications and test reports. Products with fireproof requirements must be provided with fireproof inspection
certificates and must meet national and relevant compulsory standards. If environmentally-friendly materials are to
be used as required by customers, all such materials must meet national environmental protection requirement and
be provided with relevant certificates.
3.1 Refrigerant piping
(1) Material requirement: Dephosphorization drawing copper pipe for air conditioners;
(2) Appearance requirement: The inner and outer surface of pipe should be smooth without pinhole, crack,
peeling, blister, inclusion, copper powder, carbon deposition, rust, dirt or severe oxide film, and without obvious
scratch, pit, spot and other defects.
(3) Test report: Certifications and quality test reports must be provided.
(4) The tensile strength must be at least 240 kgf/mm².
(5) Specifications requirement
(6) After the inner part of the copper pipe is cleaned and dried, the inlet and outlet must be sealed tightly by
using pipe caps, plugs or adhesive tapes.
3.2 Condensate water pipe
(1) Pipes that can be used for air conditioner drainage include: water supplying UPVC pipe, PP-R pipe, PP-C pipe,
and HDG steel pipe;
(2) All relevant certificates and quality test reports are provided.
(3) Requirements for specifications and wall thickness
Water supplying UPVC pipe: Φ32mm×2mm，×2mm，
HDG steel pipe: Φ25mm×3.25mm，，，
3.3 Insulation material
(1) Rubber foam insulation material;
(2) Flame retardancy level: B1 or higher; Refractoriness: at least 120oC.
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