Indoor/Outdoor Units Connection Finishing And Test Run - Hisense AMW2-20U4SNC1 Installation Manual

INSTALLATION MANUAL
5. INDOOR/OUTDOOR UNITS CONNECTION
FINISHING AND TEST RUN
5-1 FLARED CONNECTION
PIPE LENGTH AND HEIGHT DIFFERENCE
LIMITS
Pipe length per indoor unit
Total pipe length for multi-system
Height difference(I.D ~ O.D)
Height difference(I.D ~ I.D)
Refrigerant adjustment: If total pipe length
additional refrigerant (R410A) change is required.(The outdoor
unit is charged with refrigerant for total pipe length up to
PIPE LENGTH AND HEIGHT DIFFERENCE
Up to 15m
Pipe length
Exceeding 15m
Refrigerant
×
15g/m (refrigerant piping length(m)-15)
to be added
PIPE SIZE
If you use commercially available copper, use the following table for
specifications.
Valve size for outdoor unit
φ6.35mm
Liquid pipe
UNIT A
Gas pipe φ 9.52mm
φ6.35mm
Liquid pipe
UNIT B
Gas pipe φ9.52mm
TYPE
*Do your best to
reduce the pipe
20m*
length. Long pipe
40m
may cause capacity
10m
of the indoor unit
7.5m
incline.
exceeds 15m,
15
No additional charge is required
Additional charge is required.
Wall thickness Insulation thickness
0.8mm
8mm
0.8mm
8mm
0.8mm 8mm
8mm
0.8mm
CAUTION
Be sure to use the insulation of specified thickness. Excessi-
ve thickness may cause incorrect installation of indoor unit
and lack of thickness may cause dew drippage.
5-2 FLARING WORK
Main cause of gas leakage is defect in flaring work. Perform flaring
work correctly in the following procedure.
1.Pipe cutting
·
Cut the cooper pipe correctly with pipe cutter.
2.Burrs removal
·
m. ) Completely remove all burrs from the cut cross section of the pipe.
·
Put the end of the copper pipe downward to prevent burrs from dropp-
ing in the pipe.
3.Putting nut on
·
Remove flare nuts attached to indoor and outdoor units, then put them
on pipe having completed burr removal.
(Not possible to put them on after flaring work).
·
Flare nut for R410A pipe may differ from R22 pipe depending on the di-
ameter of pipe.
4.Flaring work
·
Perform flaring work using flaring tool as shown below.
Outsdie
Flare tool for
diameter
R410A clutch type
φ6.35mm
φ9.52mm
φ12.7mm
φ15.88mm
09
A(mm)
Conventional flare tool
Clutch type
0 to 0.5 1.0 to 1.5
0 to 0.5
1.0 to 1.5
0 to 0.5 1.0 to 1.5
0 to 0.5 1.0 to 1.5
Wing nut type
1.5 to 2.0
1.5 to 2.0
2.0 to 2.5
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