Kaysun Mini Amazon III, Engineering Data Book

Page: 109 / 140

Mini Amazon III Series
108

4 Refrigerant Piping Installation
4.1 Procedure and Principles
4.1.1 Installation procedure
Notes for installers
Installation of the refrigerant piping system should proceed in the following order:
Pip e
insulation
Pipe brazing
and installation
Pipe
flushing
Gas tightness
test
Joint
insulation
Vacuum drying
Note: Pipe flushing should be performed once the brazed connections have been completed with the exception of
the final connections to the indoor units. That is, flushing should be performed once the outdoor unit have been
connected but before the indoor units are connected.
4.1.2 Three principles for refrigerant piping
Reasons

Seal piping during storage 1

Flow nitrogen during brazing 2

Pipe flushing 3

Pipe flushing
3

Vacuum drying
4

Pipe manipulation 5 and brazing 2
techniques

Gas tightness test 6
Particles such as oxide produced
during brazing and/or building dust
can lead to compressor malfunction
Moisture can lead to ice formation or
oxidization of internal components
leading to abnormal operation or
compressor damage
Imperfect seals can lead to
refrigerant leakage
Measures
CLEAN
DRY
SEALED
Notes:
1. See Part 3, 4.2.1 “Pipe delivery, storage and sealing”.
2. See Part 3, 4.5 “Brazing”.
3. See Part 3, 4.7 “Pipe Flushing”.
4. See Part 3, 4.9 “Vacuum Drying”.
5. See Part 3, 4.3 “Manipulating Copper Piping”.
6. See Part 3, 4.8 “Gastightness Test”.