Gree GRS-Cm28/NaA-M User Manual

Chapter Ⅱ Installation（5. Installation and Heat Insulation for Pipelines of Water System）
20
requirements:
The pipe materials and parts should be light-tight with smooth inner and outer walls, the wall
thickness should be even without air bubble, scratch marks and other defects.
Interface of pipe material should be level, and the end face should be vertical to the axes of
pipe.
Pipe material should be complete without defect and distortion; joint of matched moulds and
gate stick should be flat without cracks. Wall thickness of pipe should not be thinner than the
thickness of the same series of pipe wall.
There should be designation to identify cold water pipe and hot water pipe.
4）Dimension and size of PPR pipe series are as follows: (mm)
Nominal
outer
diameter dn
Average outer diameter
Pipe Series
S5
S4
S3.2
S2.5
S2
Minimum
Maximum
Nominal wall thickness en
20
20
20.3
——
2.3
2.8
3.4
4.1
25
25
25.3
2.3
2.8
3.5
4.2
5.1
32
32
32.3
2.9
3.6
4.4
5.4
6.5
40
40
40.4
3.7
4.5
5.5
6.7
8.1
50
50
50.5
4.6
5.6
6.9
8.3
10.1
63
63
63.6
5.8
7.1
8.6
10.5
12.7
75
75
75.7
6.8
8.4
10.3
12.5
15.1
90
90
90.9
8.2
10.1
12.3
15.0
18.1
110
110
111.0
10.0
12.3
15.1
18.3
22.1
Notes: The length of pipe is generally 4m or 6m; it also can be defined according to the user‟s requirement. The
length of pipe should be no minus deviation. Wall thickness should not be less than the value stipulated in the
above sheet.
Pipe series (S) is for indicating the nondimensional parameter series of pipe specification.
In the formula: dn —— nominal outer diameter, mm;
en——wall thickness, mm;
The smaller the S is, the thicker the wall will be. With the same material, the thicker the wall is,
the corresponding pressure sustaining capacity will be better.
5）Selection of PP-R pipe is depending on the design pressure, working water temperature
and using environment of pipeline system. Using temperature of cold water pipe is ≤40℃,
long-term using temperature of hot water pipe is ≤70℃. Pipe series S of cold water pipe and hot
water pipe can be selected according to the following sheet:
n
nn
e
ed
S
2
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Gree GRS-Cm28/NaA-M Specifications

General

Brand	Gree
Model	GRS-Cm28/NaA-M
Category	Water Heater
Language	English