Haier 3U19FS1ERA Manuel D'installation page 13

Refrigerant Piping Work
3) Use separate thermal insulation pipes for gas and liquid refrigerant
pipe.
Inter unit wiring
Gas pipe
Gas pipe
insulation
Finishing tape
Check
Flare's inner
surface must be
flaw-free.
Make sure that the
flare nut is fitted.
8.Cutting and Flaring work of piping
Pipe cutting is carried out with a pipe cutter and burs must be
removed.
After inserting the flare nut, flaring work is carried out.
Pipe
A
Liquid side
Flare tooling die
Gas side
9. On drainage
Please install the drain hose so as to be downward slope without fail. Please don't do the drainage as shown below.
It becomes high
midway.
Please pour water in the drain pan of the indoor unit, and confirm that drainage is carried out serely to outdoor.
In case that the attached drain hose is in a room, please apply heat insulation to it without fail.
WARNING
1) Do not use mineral oil on flared part.
2) Prevent mineral oil from getting into the system as this would educe the lifetime of the units.
3) Never use piping which has been used for previous installations. Only use parts which are delivered with the unit.
4) Do never install a drier to this R410A unit in order to guarantee its lifetime.
5) The drying material may dissolve and damage the system.
6) Incom;ete flaring may cause refrigerant gas leakage.
Liquid pipe
Liquid pipe
insulation
Drain hose
The pipe end
must be evenly
flared in a perfect
circle.
Set exactly at the position shown below.
A
Flare tooling die
Pipe diameter Size A (mm)
6.35mm(1/4") 0.8~1.5
9.52mm(3/8") 1.0~1.5
12.7mm(1/2") 1.0~1.5
The end is immersed
in water
Rain
Flare tool for R410A
Clutch-type Clutch-type(Rigid-type)
0-0.5mm 1.0-1.5mm
Correct
Lean Damage of flare Crack
It gap with the ground its
It waves. too small.
11
Be sure to
place a cap.
If no flare cap is
available, cover the
flare mouth with tape
to keep dirt or water
out.
Cut exactly at right
Remove burrs
angles.
Conventional flare tool
Wing-nuttype(Imperial-type)
1.5-2.0mm
Incorrect
Partial
Less than
5cm
There is the bad
smell from a ditch.
Wall
Too outside