Daikin RXQ5P7W1B, Руководство по установке, Страница: 10 / 38

Installation manual
5
RX(Y)Q5-10-1 RXQ RXYQ
RXYHQ1 RX(Y)Q14~18P7W1BA
VRVIII System air conditioner
4PW48461-1
■
Support the unit with a foundation of 67 mm wide or more. (The
support leg of the unit is 67 mm wide, see
figure 3 ).
■
Fasten the unit in place using four
foundation bolts M12. It is best to screw in
the foundation bolts until their length
remains 20
mm above the foundation
surface.
Method for removing transportation stays
(only for RXYHQ12 units)
The 4 yellow transportation stays installed over the compressor legs
for protecting the unit during transport must be removed. Proceed as
shown in
figure 30 and described below.
1 Slightly loosen the fixing nut (B).
2 Remove the transportation stay (C).
3 Tighten the fixing nut (B) again.
6. R
EFRIGERANT PIPING
6.1. Installation tools
Make sure to use installation tools (gauge manifold charge hose,
etc.) that are exclusively used for R410A installations to withstand the
pressure and to prevent foreign materials (e.g. mineral oils such as
SUNISO and moisture) from mixing into the system.
(The screw specifications differ for R410A and R407C.)
Use a 2-stage vacuum pump with a non-return valve which can
evacuate to –100.7 kPa (5 Torr, –755 mm Hg).
6.2. Selection of piping material
1. Foreign materials inside pipes (including oils for fabrication)
must be 30 mg/10 m or less.
2. Use the following material specification for refrigerant piping:
■
Size: determine the proper size referring to chapter
"6.6. Example of connection" on page 9 .
■
Construction material: phosphoric acid deoxidized seamless
copper for refrigerant.
■
Temper grade: use piping with temper grade in function of the
pipe diameter as listed in the table below.
■
Prepare a water drainage channel around the
foundation to drain waste water from around the unit.
■
If the unit is to be installed on a roof, check the
strength of the roof and its drainage facilities first.
■
If the unit is to be installed on a frame, install the
waterproofing board within a distance of 150 mm
under the unit in order to prevent infiltration of water
coming from under the unit.
■
When installed in a corrosive
environment, use a nut with
plastic washer (1) to protect the
nut tightening part from rust.
A Compressor
B Fixing nut
C Transportation stay
CAUTION
If the unit is operated with the transportation stays still in
place, abnormal vibration or noise may be generated.
20 mm
1
Do not insert fingers, rods or other objects into the air
inlet or outlet. When the fan is rotating at high speed, it
will cause injury.
Use R410A to add refrigerant.
All field piping must be installed by a licensed refrigeration
technician 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. (Particularly for the HFC refrigerant piping)
Therefore, use the phosphor copper brazing filler metal
(BCuP) which does not require flux.
Flux has extremely harmful influence on refrigerant piping
systems. 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.
Be sure to perform a nitrogen blow when brazing. Brazing
without performing nitrogen replacement or releasing
nitrogen into the piping will create large quantities of
oxidized film on the inside of the pipes, adversely affecting
valves and compressors in the refrigerating system and
preventing normal operation.
After completing the installation work, check that the
refrigerant gas does not leak.
Toxic gas may be produced if the refrigerant gas leaks into
the room and comes in contact with a source of fire.
Ventilate the area immediately in the event of a leak.
In the event of a leak, do not touch the leaked refrigerant
directly. Frostbite may be caused.
NOTE
Make sure the pump oil does not flow oppositely into
the system while the pump is not working.
Pipe Ø Temper grade of piping material
≤
15.9 O
≥
19.1 1/2H
O = Annealed
1/2H = Half hard