Installing The Refrigerant Pipe; Refrigerant Piping - Pioneer CYB Series Installation Manual

3
INSTALLING THE REFRIGERANT PIPE
A
All field piping must be provided by a licensed refrigeration
technician, and must comply with all relevant local and
national codes.
Precautions
•
Execute heat insulation work to completion on both sides of the
gas piping and liquid piping. Otherwise, it can sometimes result
in water leakage.
(When using a heat pump, the temperature of the gas piping can
reach up to approximately 120'C/248 F. Use insulation that has
sufficient resistance.)
•
Also, in cases where the temperature and humidity of the
refrigerant piping sections might exceed 30'C/86 F or Rh80%,
reinforce the refrigerant insulation (by 20mm/0.8in, or thicker).
Condensation may form on the surface of the insulating material.
•
Before rigging tubes, check which type of refrigerant is used
•
Use a pipe cutter and flare suitable for used refrigerant.
•
Only use annealed material for flare conncetions.
•
Do not mix anything other than the specified refrigerant, such
as air, etc.., into the refrigerant circuit.
•
If the refrigerant gas leaks during the work, ventilate the area.
A toxic gas is at risk of being emitted by the refrigerant gas if
exposed to a fire.
•
Make sure there is no refrigerant gas leak. A toxic gas may be
released by the refrigerant gas leaking indoors and being
exposed to flames from an area heater, cooking stove, etc.
•
Refer to the table below for the dimensions of flare nuts spaces
and the appropriate tightening torque. (Overtightening may
I
damage the flare, and cause leaks.)
P ip g uge
Tig htening tor q ue
� )
( �
15-16N m
邵.35( 1 / 4 叫 ( 1 53-163 kgf.cm)
25-26 N. m
[?Jg 52(3/Sin) I ( 2 55-265 kgf.cm)
35-36 N. m
01 2 1 ( 11 2 i n ll (357-367 kg f .cm
)
45-47 N. m
0159(5/8m) I
( 4 59-480 kgfcm )
• Check whether the height drop between the indoor unit and
outdoor unit, as well as the length of refrigerant pipe, meet the
following requirements:
Capacity
Model Type
( B tu/h )
9K-12K
R410A inverter
Split type ai「 conditione「
18K
°
°
飞＄ 霄
Fla「e sion
Flare shape
8 3-8 7
0.327-0.343in
。
土4
90
12.0-12.4
0.472�0.488in
15.4-15.8
0.606-0.622in
18.6-19.0
0.732-0.74Bm
Max.allowable Max.allowable
pipi ng leng th pipi ng heig ht
25m/82ft 10m/33ft
30m/100ft 20m/66ft
3.1 Flaring the Pipe
1) Cut the pipe end with a pipe cutter.
2) Remove burrs with the cut surface, facing downward so that
the chips do not enter the pipe.
c" "" "' "
right angles.
3) Put the flare nut onto the pipe.
4) Flare the pipe.
(in mm/25.4)
=
A ( m m)
Oute「 diam.
(mm)
Max. Min.
1.3 0.7
邵35(1/ 4 in)
邵.52(3/Bin) 1 6 1 0
1 8 1 0
如2.7(1/2in)
如5.9(5/Bin) 22
5) Check that the flaring is properly made.
Flare's inner surface
must be free of flaws
I
3.2

Refrigerant Piping

• Coat the flare, both inside and outside, with ether oil or ester oil
厂
C oa t here with ether oi
�
�
•
Align the centres of both fla「es, and tighten the flare nuts 3 or 4
turns by hand. Then tighten them fully with the torque wrenches
2
9
E s
nd
ID
/ I�Remove burrs
Set exactly at the position shown below.
20
The pipe end must
be evenly fla ed in a
「
perfect circle.
Make sure that the
flare nut is fitted.
l or ester oil
Tor q ue wrench
2 Flare nut
3 P iping union
4 Spanner
3 4