– 8 –
EN
ID
ID
REQUIREMENT
• For Brazing work of the refrigerant pipes, be sure to use nitrogen gas in order to prevent oxidation of the inside
of the pipes; otherwise clogging of the refrigerating cycle due to oxidized scale may occur.
• Use clean and new pipes for the refrigerant pipes and perform piping work so that water or dust does not
contaminate the refrigerant.
• Be sure to use two spanners to loosen or tighten the Àare nut. If a single spanner is used, the required level of
tightening cannot be obtained. Tighten the Àare nut with the speci¿ed torque. (If it is hard to loosen or tighten the
Àare nut of the balance pipe or packed valve of the liquid side with two spanners, loosen or tighten the Àare nut
while holding the valve mounting plate with a spanner.)
Outer dia. of
copper pipe
Tightening torque (N•m)
6.4 mm 14 to 18 (1.4 to 1.8 kgf•m)
9.5 mm 33 to 42 (3.3 to 4.2 kgf•m)
12.7 mm 50 to 62 (5.0 to 6.2 kgf•m)
15.9 mm 68 to 82 (6.8 to 8.2 kgf•m)
19.1 mm 100 to 120 (10 to 12 kgf•m)
Ball valve of discharge gas side
Do not clamp the service port
with two spanners, doing so may
damage the service port.
Do not apply refrigerating oil to the surface of
the Àare.
Pipe connection method (Example)
Draw-out forward Draw-out downward
Suction-side
gas pipe
Cut the L-shaped pipe, then braze the
socket procured locally.
Suction-side
gas pipe
Cut the L-shaped pipe, then braze the
socket procured locally.
Discharge-side
gas pipe
Braze the supplied attachment pipe
and elbow procured locally.
Discharge-side
gas pipe
Braze the supplied attachment pipe
and socket procured locally.
Liquid pipe
Braze the supplied attachment pipe
and socket procured locally.
Liquid pipe
Braze the supplied attachment pipe
and socket procured locally.
Discharge-side
gas pipe
L-shaped
pipe
Suction-side
gas pipe
Pipe
Socket
Pipe
Pipe
Socket
Elbow
Attachment
pipe
Attachment
pipe
Liquid pipe
Section
to be cut
Suction-side
gas pipe
Pipe
Balance
pipe
Discharge-side
gas pipe
L-shaped
pipe
Suction-side
gas pipe
Pipe
Socket
Socket
Pipe
Pipe
Socket
Attachment
pipe
Attachment
pipe
Liquid pipe
Section
to be cut
Suction-side
gas pipe
Pipe
Balance
pipe
Extruding margin of copper pipe with Àare machining: B (Unit: mm)
Copper pipe outer
dia.
When using R410A
tool
When using
conventional tool
9.5
12.7
15.9
19.1
0 to 0.5 1.0 to 1.5
Extruding margin of copper pipe with Àare tools: A (Unit: mm)
Copper pipe outer
dia.
A
+0
í0.4
9.5 13.2
12.7 16.6
15.9 19.7
19.1 24.0
• When using the conventional Àare tool, to connect R410A pipes with Àaring, make a margin approx. 0.5 mm
longer than that of an R22 pipe so that the Àare size matches the one speci¿ed. It is convenient to use a copper
pipe gauge for size adjustment of the extruding margin.
• The Àared supplied attachment pipe (Ø19.1) must be used to connect with discharge-side gas pipe valve
(Ø19.1). (MAP120 to MAP200) Do not use half hard or hard materials instead of the supplied attachment pipe.
The half hard or hard materials may be cracked and may cause leakage of refrigerant when it is Àared.
• Use the Àare nut provided with the product.
• After Àaring the connection, be sure the Àared part is not damaged, deformed, uneven, or Àattened, and that
there are no cutting chips on it.
CAUTION
Wrap the ball valve in a wet cloth to keep it cool and prevent the heat from
the torch from damaging it when connecting the pipe to the ball valve on the
suction side gas line.
Wet cloth
Torch
15-EN 16-EN
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