Gree GMV-ND22C/A-T - Condensate Water Pipe; Insulation Material; Communication Cable and Control Cable

GREE GMV5 INDOOR UNIT SERVICE MANUAL
89
Specifications requirement
R410A Refrigerant System
OD (mm/inch)
Wall Thickness (mm)
Model
Φ6.35(1/4)
≥0.8
0
Φ9.52(3/8)
≥0.8
0
Φ12.70(1/2)
≥0.8
0
Φ15.9(5/8)
≥1.0
0
Φ19.05(3/4)
≥1.0
0
(5) 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.
2.2 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
，
Φ40mm×2mm
，
Φ50mm×2.5mm;
HDG steel pipe: Φ25mm×3.25mm
，
Φ32mm×3.25mm
，
Φ40mm×3.5mm
，
Φ50mm×3.5mm.
2.3 Insulation material
(1) Rubber foam insulation material;
(2) Flame retardancy level: B1 or higher;
(3) Refractoriness: at least 120°C ;
(4) The insulation thickness of condensate water pipe: at least 10 mm;
(5) When the diameter of copper pipe is equal to or greater than Φ15.9 mm, the thickness of
insulation material should be at least 20 mm; when the diameter of copper pipe is less than 15.9
mm, the thickness of insulation material should be at least 15 mm.
2.4 Communication cable and control cable
Note:
For air conditioning units installed in places with strong electromagnetic interference, shielded wire
must be used as the communication cables of the IDU and wired controller, and shielded twisted pairs
must be used as the communication cables between IDUs and between the IDU and ODU.
Communication cable selection for IDU and IDU(ODU)
Material Type
Total Length of
Communication Cable
between IDU Unit and IDU
(ODU ) Unit L(m/ft)
Wire size
(mm
2
/AWG)
Material
Standard
Remarks
Light/Ordinary
polyvinyl chloride
sheathed cord.
(60227 IEC 52
/60227 IEC 53)
L≤1000(3280-5/6)
≥2×0.75
(≥2×AWG18)
IEC 60227-
5:2007
1. If the wire diameter is enlarged to
2×1 mm
2
(2×AWG16), the total
communication line length can
reach 1500 m (4921-1/4ft).
2. The cord shall be Circular cord
(the cores shall be twisted
together).
3. If unit is installed in places with
intense magnetic field or strong
interference, it is necessary to
use shielded wire.