installing your air conditioner
_25
ENGLISH
Performing Leak Test & Insulation
1.
To avoid condensation problems, place
T13.0 or thicker
Acrylonitrile Butadien Rubber
separately around each
refrigerant pipe.
Always make the seam of pipes face upwards.
Note
2.
Wind insulating tape around the pipes and drain hose
avoiding to compress the insulation too much.
3.
Finish wrapping insulating tape around the rest of the
pipes leading to the outdoor unit.
4.
The pipes and electrical cables connecting the indoor unit
with the outdoor unit must be fixed to the wall with
suitable ducts.
The designs and shape are subject
to change according to the model.
LEAK TEST WITH NITROGEN(before opening valves)
In order to detect basic refrigerant leaks, before recreating the
vacuum and recirculating the R410A, it’s responsible of installer
to pressurize the whole system with nitrogen(using a pressure
regulator) at a pressure above 4.1MPa(gauge).
LEAK TEST WITH R410A(after opening valves)
Before opening valves, discharge all the nitrogen into the
system and create vacuum. After opening valves check leaks
using a leak detector for refrigerant R410A.
Leak test
Leak check
Once you have checked that there are no leaks in the system,
you can insulate the piping and hose.
Insulation
Insulation cover pipe
Indoor unit
Be sure to overlap
the insulation
Insulation pipe
No gap
NBR(T13.0 or thicker)
5.
Select the insulation of the refrigerant pipe.
Insulate the gas side and liquid side pipe referring to the
thickness according to the pipe size.
The thickness according to the pipe size is a standard of
the indoor temperature of 27°C and humidity of 80%.
If installing in an unfavorable conditions, use thicker one.
Insulator’s heat-resistance temperature should be more
than 120°C.
Pipe size
(mm)
Minimum thickness
of insulation (mm)
Remarks
PE foam EPDM
foam
Ø6.35~Ø15.88
13
10
If you install the pipe
underground, at the seaside,
a spa or on the lake, use 1 grade
thicker one according to the
pipe size.
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25
19
Drain pipe and Drain Hose Installation
1.
Install the drain pipe as shortly as possible.
Give a slightly slant to the drainpipe for proper drainage
of condensate water.
There must be no gap on the connected part so that the
drainpipe is not separated from the flexible hose.
2.
Insulate the drainpipe, and then fix it as indicated.
Whole drainpipe should be insulated by 5t(or more)
insulation to prevent water condensation.
Insulation drainpipe
Band
Band
Flexible
hose
Drain
hose port
Drainpipe
Adhesives
Insulation cover band
Insulation cover drain
Band(Not supplied)
Indoor
Unit
Discharge all the nitrogen to create a vacuum and
charge the system.
All refrigerant connection must be accessible, in order
to permit either unit maintenance or removing it
completely.
Install the insulation not to get wider and use the
adhesives on the connection part of it to prevent
moisture from entering.
Wind the refrigerant pipe with insulation tape
if it is exposed to outside sunlight.
Install the refrigerant pipe respecting that the
insulation does not get thinner on the bent part or
hanger of pipe.
Add the additional insulation if the insulation plate
gets thinner.
Additional insulation
Refrigerant pipe insulation
a×3
a
Hanger
Must fit tightly against
body without any gap.
Cassette type_IB_E_29823A(8)_SSECｿ・indd 25
2010-07-30 ｿﾀﾀ・10:18:30
