12
The top and two side surfaces must be exposed to
open space, and barriers on at least one side of the
front and back shall be lower than the outdoor unit.
(2) Multi-unit installation (unit: mm)
Back and side
Front and back
Above 1000
Above 150
Above 300
Above 300
Above 300
Above 300 Above 300
Height of barriers is below that of outdoor unit
(3) Multi-unit installation in front and back (unit: mm)
Standard
Above 1000
Above 2000
Above 200
The top and two side surfaces must be exposed to open
space, and barriers on at least one side of the front and
back shall be lower than the outdoor unit.
The installation service spaces shown in the illustrations
are based on an air intake temperature of 35 (DB)
for COOL operation. In regions where the air intake
temperature regularly exceeds 35 (DB), or if the heat
load of outdoor units is expected to regularly exceed the
maximum operating capacity, reserve a larger space
than that indicated at the air intake side of units.
Regarding the required air outlet space, position the
units with consideration to the space required for the
onsite refrigerant piping work as well. Consult your
dealer if the work conditions do not match those in
the drawings.
5.3. Drain pipe disposal
Make sure the drain works properly.
In regions where buildups of snow can be expected,
the accumulation and freezing of snow in the space
between the heat exchanger and external plate may
lower operating efficiency.
After punching the knock-out hole, the application
of repair-type paint on the surface around the edge
sections is recommended to prevent rust.
6. Refrigerant pipe size and
allowable pipe length
DANGER
Piping an other pressure containing parts shall
comply with the applicable legislation and shall
be suitable for refrigerant. Use phosphoric acide
deoxidised seamless copper for refrigerant.
Installation shall be done by an installer, the choice
of materials and installation shall comply with
applicable legislation. In Europe the EN378 is the
application standard that shall be used.
INFORMATION
It is forbidden to discharge refrigerant into the
atmosphere. Collect the refrigerant in accordance
with
the freon collection and destruction law.
NOTICE
To persons in charge of piping work:
Be sure to open the stop valve after piping
installing
and vacuuming is complete. (Running the system
with the valve closed may break the compressor.)
NOTICE
Do not use flux when brazing the refrigerant piping.
For brazing, use phosphor copper brazing filler metal
(BCuP) which does not require a flux.
(If a chlorine flux is used, the piping will corrode, and
if the flux contains fluoride, if will cause the
coolant
oil to deteriorate, adversely affecting the
coolant
piping system.)
When barriers exist above the unit
Above 500
Above 1000
Above
1000
