51
c)
Ensure that the compressor is not expose to open air for more than the recommended time specified by
its manufacturer (typically less than 10 minutes). Removed the seal-plugs only when the compressor is
about to be brazed.
d)
The system should be thoroughly vacuumed to 1.0 Pa (-700mmHg) or lower. This vacuuming level is
more stringent than R22 system so as to ensure no incompressible gas and moisture in the system.
e)
When charging R407C, ensure that only liquid is being withdrawn from the cylinder or can. This is to
ensure that only the original composition of R407C is being delivered into the system. The liquid
composition can be different from the vapor composition.
Composition of R407C in vapour phase
is different from liquid phase.
f) Normally, the R407C cylinder or can is being equipped with a dip-pipe for liquid withdrawal. However, if
the dip-pipe is not available, invert the cylinder or can so as to withdraw liquid from the valve at the
bottom.
g) When servicing leak, the top-up method, commonly practiced for R22 system, is not recommended for
R407C system. Unlike R22 where the refrigerant is of a single component, the composition of R407C,
which made-up of three different components, may have changed during the leak. Consequently, a
top-up may not ensure that the R407C in the system is of original composition. This composition shift
may adversely affect the system performance. It is recommended that the system should be evacuated
thoroughly before recharging with R407C.
R32/R125/R134
33% / 33% / 34%
23% / 25% / 52%
Dip-pipe
Invert cylinder
without dip-pipe
Liquid
withdrawal
Summary of Contents for ACC 10 C/CR
Page 16: ...15 MODEL ACC50C MODEL ACC60C...
Page 26: ...25 MODEL ACC 60 ALC 60C FOR EXPORT SPEC WITH MC MODEL ACC 60C ALC 60C FOR LOCAL SPEC...
Page 27: ...26 MODEL ACC 60C AMC 60C FOR EXPORT SPEC WITH SLM CONTROL C3 0BCC...
Page 28: ...27 MODEL ACC 10CR 15CR ALC A4LC 10BR 15BR...
Page 29: ...28 MODEL ACC 20CR 25CR ALC A4LC 20BR 25BR...
Page 30: ...29 MODEL ACC 30CR ALC A4LC 30CR...
Page 31: ...30 MODEL ACC 40CR 50CR ALC A4LC 40CR 50CR...
Page 32: ...31 MODEL ACC 60CR ALC 60CR...
Page 33: ...32 MODEL ACC 60CR AMC 60CR FOR EXPORT SPEC WITH SLM CONTROL C3 0BCC...
Page 37: ...36 MODEL ACC 60C AMC 60C FOR EXPORT SPEC WITH SLM CONTROL U1 4...
Page 38: ...37 MODEL ACC 10 15CR ALC A4LC 10 15BR FOR EXPORT SPEC WITH SLM CONTROL U1 4...
Page 39: ...38 MODEL ACC 20 25CR ALC A4LC 20 25BR FOR EXPORT SPEC WITH SLM CONTROL U1 4...
Page 40: ...39 MODEL ACC 30CR ALC A4LC 30CR FOR EXPORT SPEC WITH SLM CONTROL U1 4...
Page 41: ...40 MODEL ACC 40 50CR ALC A4LC 40 50CR FOR EXPORT SPEC WITH SLM CONTROL U1 4...
Page 42: ...41 MODEL ACC 60CR ALC 60CR FOR EXPORT SPEC WITH SLM CONTROL U1 4...
Page 43: ...42 MODEL ACC 60CR AMC 60CR FOR EXPORT SPEC WITH SLM CONTROL U1 4...
