Installation
SiEN34-705
28
General Information
c) Brazing
The Multi-System requires only copper/copper jointing and the jointing method is explained
below.
!
The use of “hard solder” is essential.
The R-410A Heat Pump, Cooling Only RX(Y)Q-P Series uses a wide range of piping sizes. You
should therefore be careful when selecting the nozzle tip. If a small nozzle tip is used for brazing
piping of large diameters such as
φ
38.1 and
φ
44.5, brazing flow becomes poor.
Table 1: Correlation of nozzle tip and size of refrigeration piping
Note:
The values in the table above are for type B torch (French).
Type
Solder:
JIS mark
BCup-2
(Phospor
copper solder
BAg-2
(Silver solder)
Soldering:
temperature
(°C)
735
840
700
845
Breaking
strengh
(kg/mm
2
)
Approx.
25
Approx.
25
Soldering
method
Gas
Gas
Jointing
distance
(mm)
0.05
0.2
0.05
0.2
Example
for
reference
(product
name)
Flux
(example
for
reference)
Not
required
Remarks
BCup-2 reacts easily with slufur to form a
fragile water-soluble compound and
should not therefore be used where the
environment is not suitable.
Suitable for environments with a high
sulfur content
Hard solder
This is used under
normal conditions
6.4
9.5
12.7
15.9
19.1
22.2
25.4
28.6
31.8
34.9
38.1
41.3
Nozzle tip No.
1.6
2.4
3.2
(V0977)
Piping siz
e
# 200
# 225
# 250
# 315
# 400
# 450
# 500
Brazing Rod diameter
φ
Содержание RXYQ5PY1
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