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1.5.3 Installation of outdoor unit
(1) Haulage and installation (Take particular care in carrying in or moving the unit, and always perform such an
operation with two or more persons.)
(a) Delivery
1) Deliver the unit as close as possible to the installation site before remov-
ing it from the package.
2) When some compelling reason necessitates the unpacking of the unit
before it is carried in, use nylon slings or protective wood pieces so as
not to damage the unit by ropes lifting it.
(b) Portage
The right hand side of the unit as viewed from the front (diffuser side) is
heavier. A person carrying the right hand side must take heed of this fact. A
person carrying the left hand side must hold with his right hand the handle
provided on the front panel of the unit and with his left hand the corner
column section.
(c) Selecting the installation location
Be careful of the following conditions and choose an installation place.
Where air is not trapped.
Where the installation fi ttings can be fi rmly installed.
Where wind does not hinder the intake and outlet air.
Out of the heat range of other heat sources.
A place where stringent regulation of electric noises is applicable.
Where it is safe for the drain water to be discharged.
Where noise and hot air will not bother neighboring residents.
Where snow will not accumulate.
Where strong winds will not blow against the outlet pipe.
A place where no TV set or radio receiver is placed within 5 m.
(If electrical interference is caused, seek a place less likely to cause the problem)
Where it is likely that the unit is subjected to strong winds, provide wind guards according to the following guidelines.
Strong winds can cause performance degradation, an accidental stop due to a rise of high pressure and broken fan.
Notabilia as a unit designed for R410A
•
Do not use any refrigerant other than R410A. R410A will rise to pressure about 1.6 times higher than that of a conventional
refrigerant.
•
A unit designed for R410A has adopted a different size indoor unit service valve charge port and a different size check joint
provided in the unit to prevent the charging of a wrong refrigerant by mistake. The processed dimension of the fl ared part of
a refrigerant pipe and a fl are nut’s parallel side measurement have also been altered to raise strength against pressure. Ac-
cordingly, you are required to arrange dedicated R410A tools listed in the table on the right before installing or servicing this
unit.
•
Do not use a charge cylinder. The use of a charge cylinder will cause the refrigerant composition to change, which results in
performance degradation.
•
In charging refrigerant, always take it out from a cylinder in the liquid phase.
•
All indoor units must be models designed exclusively for R410A. Please check connectable indoor unit models in a catalog,
etc. (A wrong indoor unit, if connected into the system, will impair proper system operation)
Gauge manifold
Charge hose
Electric scale for refrigerant charging
Torque wrench
Flare tool
Protrusion control copper pipe gauge
Vacuum pump adapter
Gas leak detector
a)
b)
c)
d)
e)
f)
g)
h)
Dedicated R410A tools
Pad
Wooden pallet
Heavy
Heavy
Wooden pallet
Pad
CAUTION
When a units hoisted with slings for haulage, take into consideration the offset of its gravity canter position. If not properly bal-
anced, the unit can be thrown off-balance and fall.
