English
6
5.
UNPACKING AND PLACING THE UNIT
•
Make sure the unit is installed level on a sufficiently strong base to
prevent vibration and noise.
•
Secure the unit to its base using foundation bolts. (Use four com-
mercially available M12-type foundation bolts, nuts, and washers.)
•
The foundation bolts should be inserted
20 mm.
•
Make sure the base under the unit extended
more than 765mm behind the unit.
•
The height of the base should be at least 150mm from the floor.
•
The unit must be installed on a solid longitudinal foundation
(steelbeam frame or concrete) as indicated in figure 4.
(Refer to figure 4)
1.
Foundation bolt point (
φ
15 dia. : 4 positions)
2.
Depth of product
3.
Shape of indoor unit’s support leg and foundation bolt
positions
DO NOT USE STANDS TO SUPPORT THE CORNERS
(Refer to figure 5)
1.
Do not use stands to support the corners.
Caution
1.
Prepare a water drainage channel around the foundation to
drain waste water from around the unit.
2.
If the unit is to be installed on a roof, check the strength of the
roof and its drainage facilities first.
3.
If the unit is to be installed on a frame, install the waterproof-
ing board within a distance of 150mm under the unit in order
to prevent infiltration of water coming from under the unit.
[Precaution]
•
When installing on a roof, make sure the roof floor is strong
enough and be sure to water-proof all work.
•
Make sure the area around the machine drains properly by setting
up drainage grooves around the foundation.
(Drain water is sometimes discharged from the outdoor unit when
it is running.)
•
Block all gaps in the holes for passing out piping and wiring using
sealing material (locally procured).
(Small animals may enter the machine.)
Ex: passing piping out through the front
1.
Plug the areas marked with “
”.
(When the piping is routed from the front panel.)
2.
Gas side piping
3.
Liquid side piping
6.
REFRIGERANT PIPING
Caution
After completing installation, be sure to open the valve.
(See
6-6 Additional refrigerant charge
for details) (Operating
the unit with the valve shut will break the compressor.)
Use R22 to add refrigerant.
All field piping must be installed by a licensed refrigeration techni-
cian and must comply with relevant local and national regulations.
CAUTION TO BE TAKEN WHEN BRAZING REFRIGERANT PIPING
Do not use flux when brazing copper-to copper refrigerant piping.
Therefore, use the phosphor copper brazing filter metal(BCuP)
which does not require flux.
(Flux has extremely harmful influence on refrigerant piping sys-
tems. For instance, if the chlorine based flux is used, it will cause
pipe corrosion or, in particular, if the flux contains fluorine, it will
damage the refrigerant oil.)
Note
•
Use R22 only when adding refrigerant.
•
Installation tools:
Make sure to use installation tools (gauge manifold charge hose,
etc.) that are exclusively used for R22 installations to withstand
the pressure and to prevent foreign materials from mixing into the
system.
Vacuum pump (use a 2-stage vacuum pump with a non-return valve):
1.
Make sure the pump oil does not flow oppositely into the sys-
tem while the pump is not working.
2.
Use a vacuum pump which can evacuate to –100.7 kPa (5Torr,
–755mmHg).
6-1 Selection of piping material
1.
Foreign materials inside pipes (including oils for fabrication) must
be 30mg/10m or less.
2.
Use the following material specification for refrigerant pipping:
•
construction material: Phosphoric acid deoxidized seamless
copper for refrigerant.
•
size: Determine the proper size referring to chapter “Example
of connection”.
•
The wall thickness of the refrigerant piping should comply with
relevant local and national regulations. For R22 the design
pressure is 2.8 MPa.
3.
Make sure to use the particular branches of piping that have been
selected referring to chapter “Example of connection”.
6-2 Connecting the refrigerant piping
1.
The local branch piping can be connected either forward or to the
sides (taken out of the bottom) as shown in the figure.
1.
Left-side connection
2.
Front connection
3.
Right-side connection
[One outdoor unit installed: In case of RX5-16MY1(E)]
•
Front connection:
Remove the shutoff valve cover to connect.
(Refer to figure 6)
•
Side (bottom) connection:
Remove the knock holes on the bottom frame and route the piping
under the bottom frame.
(Refer to figure 6)
Model
A
B
RX5 type
635
497
RX8 · 10 type
930
792
RX12 · 14 · 16 type
1240
1102
20
1
2
3
1
2
3
01_3P114261-9L-EN.fm Page 6 Thursday, August 28, 2003 3:33 PM
