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Airwell Multisplit YAZE CINCO DCI Seite 6

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ATTACHED ACCESSORIES
INSTALLATION / SERVICE TOOLING FOR R410A Changes
Gauge manifold As the working pressure is high, it is impossible to measure the working pres-
sure using conventional gauges. In order to prevent any other refrigerant from
being charged, the port diameters have been changed.
Charge hose In order to increase pressure resisting strength, hose materials and port sizes
have been changed (to 1/2 UNF 20 threads per inch). When purchasing a
charge hose, be sure to confirm the port size.
Electronic scale for
refrigerant charging
As working pressure is high and gasification speed is fast, it is difficult to read
the indicated value by means of charging cylinder, as air bubbles occur.
Torque wrench
(nominal dia. 1/2, 5/8)
The size of opposing flare nuts have been increased. Incidentally, a common
wrench is used for nominal diameters 1/4 and 3/8.
Flare tool (clutch type) By increasing the clamp bar's receiving hole size, strength of spring in the tool
has been improved.
Gauge for projection adjustment Used when flare is made by conventional flare tool.
Vacuum pump adapter
& check valve
Connected to a conventional vacuum pump. It is necessary to use an adapter
to prevent vacuum pump oil from flowing back into the charge hose. The charge
hose connecting part has two ports -- one for conventional refrigerant (7/16
UNF 20 threads per inch) and one for R410A. If the vacuum pump oil (mineral)
mixes with R410A a sludge may occur and damage the equipment.
Gas leakage detector Exclusive for HFC refrigerant.
Incidentally, the “refrigerant cylinder” comes with the refrigerant designation (R410A) and protector coating in the U.S’s ARI specified rose colour
(ARI colour code: PMS 507). Also, the “charge port and packing for refrigerant cylinder” requires 1/2 UNF 20 threads per inch corresponding to
the charge hose’s port size.
CAUTION R410A Air Conditioner Installation ______________________________________________________
THIS AIR CONDITIONER ADOPTS THE NEW HFC REFRIGERANT
(R410A) WHICH DOES NOT DESTROY OZONE LAYER. R410A
refrigerant is apt to be affected by impurities such as water, oxidizing
membrane, and oils because the working pressure of R410A refrig erant
is approx. 1.6 times of refrigerant R22. Accompanied with the adoption
of the new refrigerant, the refrigeration machine oil has also been
changed. Therefore, during installation work, be sure that water, dust,
former refrigerant, or refrigeration machine oil does not enter into the
new type refrigerant R410A air conditioner circuit. To prevent mixing of
refrigerant or refrigerating machine oil, the sizes of connecting sections
of charging port on main unit and installation tools are different from
those used for the conventional refrigerant units. Accordingly, special
tools are required for the new refrigerant (R410A) units. For connecting
pipes, use new and clean piping materials with high pressure fittings
made for R410A only.
Moreover, do not use the existing piping because there are some
problems with pressure fittings and possible impurities in existing
piping.
Changes in the product and components
In air conditioners using R410A, in order to prevent any other refrigerant
from being accidentally charged, the service port diameter size of the
outdoor unit control valve (3 way valve) has been changed. (1/2 UNF
20 threads per inch).
In order to increase the pressure resisting strength of the refrigerant
piping, flare processing diameter and opposing flare nuts sizes have
been changed. (for copper pipes with nominal dimensions 1/2 and
5/8).
In case of pipes welding please make sure to use dry Nitrogen inside
the pipes.
Use copper tube of special thickness for R410A: 1/4”-1/2” 0.8 mm
5/8”-3/4” 1 mm
7/8” 1.1 mm
Description Amount
Name Use
1 Technician’s installation manual Installation instructions
4 Rubber mounting pads Padding of the outdoor unit
1 Drain elbow Connecting drain hose to outdoor
2
Transition unions 1/2” - 3/8” Flare connection transitions in outdoor unit
2 T Flare connection transitions in outdoor unit
2 Transition unions 3/8” - 1/4” Flare connection transitions in outdoor unit
4
ransition unions 1/2" - 5/8"
… 6 …

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