York R-410A, Technical & Service Manual, Page: 276 / 385

Installation
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The following table takes steel pipeline as an example, the other thickness of the pipeline
material can be looked up in the correlative standard of the book <construction and accept
criterion>
Square pipeline 600/630
Type Pipeline
Diameter
(long border )
dimension Ground
pipeline
Middle and low
pressure system
High pressure system
80—320 0.5 0.5
340—450 0.6 0.6
480—630 0.8 0.6
670—1000 0.8 0.8
0.8
1120—1250 1.0 1.0 1.0
1320—2000 1.2 1.0 1.2
2500—4000 1.2 1.2 1.2
7.2) Pipeline Installation
7.2.1 When the pipeline and its accessories pass through wall, board and roof, holes should
be reserved in advance, and the dimension and location should meet the design demand.
7.2.2 The configure of the spot pipeline connection should not reduce its valid section.
7.2.3 The hanger can’t be set at the air-outlet, valve, and examination-port and automatic
control machine. And the suspender isn’t suitable to be fixed at the flange.
7.2.4 The configure of the spot pipeline connection should not reduce its valid section.
Horizontal installation Vertical installation
Unconcealed
I
ll i
δ
≤3mm/m
Δ
≤20mm
δ
≤2mm/m
Δ
≤20mm
Concealed Installation Installation correct, no obvious tolerance
δ
—tolerance /meter
Δ
—total tolerance
7.2.5 The hanger of insulated pipeline should set outside the insulation layer and can’t injure
the insulation layer.