Emerson Copeland Scroll YHV 2P Series - Start-up & Operation; Strength Pressure Test

24 AGL_HP_VS_YHV2P_E_Rev0
5 Start-up & operation
WARNING
Diesel effect! System explosion! The mixture of air and oil at high
temperature can lead to an explosion. Avoid operating with air.
WARNING
Air/flammable refrigerant mixture! Creation of a flammable atmosphere!
Make sure the atmosphere is non-flammable before starting the system.
Ensure that the system contains only refrigerant.
5.1 Strength pressure test
WARNING
High pressure! Personal injuries! Consider personal safety requirements
and refer to test pressures prior to test.
CAUTION
System contamination! Bearing malfunction! Use only dry nitrogen for
pressure testing. DO NOT USE other industrial gases.
5.1.1 Compressor strength-pressure test
The compressor has been strength-pressure tested in the Emerson factory. It is not necessary for
the customer to strength-pressure test the compressor another time.
The scroll compressors are divided into two pressure zones. The compressor high-side and low
side PS (maximum allowable pressure) have to be respected at any time.
5.1.2 System strength-pressure test
A strength-pressure test of individual sections of the entire system is permissible. Once the
compressor is isolated, the rest of the system could be tested with the desired pressure values.
The strength-pressure test could also be carried out with the connected compressor, but then the
two pressure zones of the scroll compressor would need to be respected:
• System high pressure section
o define the system high side PS ≤ compressor high side PS
o separate the high- and low-pressure sections of the system by closing valves,
solenoid valves, expansion valves or by other means
o use the internal check valve of the compressor on the discharge side or add an
external check valve, to protect the internal check valve of the compressor respect
a maximum delta pressure between high- pressure side and low-pressure side ≤
40 Bar
o activate the check valve with a fast pressure increase. Once the check valve is
activated, the pressure increase could be slowed down
o now the system test pressure of 1,1 x system high side PS could be applied for a
short time
o during this test, make sure the pressure inside the compressor does not exceed
the maximum PS value, which corresponds to compressor low pressure PS
• System low pressure section
o define the system low side PS ≤ compressor low side PS
o the system test pressure of 1,1 x system low side PS could be applied for a short
time
5.2 Compressor tightness test
WARNING
High pressure! Personal injuries! Consider personal safety requirements
and refer to test pressures prior to test.
CAUTION
System contamination! Bearing malfunction! Use only dry inert gases (for
example nitrogen) for leak testing. DO NOT USE other industrial gases.
The compressor has been leak-tested in the Emerson factory. As the compressor complies with
EN 60335-2-34, it is not necessary for the installer to leak-test the compressor.