• Installation
• Systems • Installation
2
Introduction
Precautions on installation
R-407C applies higher pressure than R-22 and uses refrigeration oil
different from R-22. Therefore, piping works and tools are also different
from those for R-22 refrigerants.
Refrigerant piping materials
REFNET piping materials
•Branch pipe and dividing pipe for R-407C are provided specially for REFNET piping. Since these new parts are not interchangeable with current
REFNET parts, do not use current REFNET piping materials for R-407C. (Refer to the option list)
Other refrigerant piping materials
•Use C 1220 type copper tube for refrigerant piping. Wall thickness of copper tube shown in the below table can be applied.
(The table is the same as the recommendation for R-22)
Recommendable oil for pipe processing
•Daphne Master Draw 510LS•530LS•565NR•566LS (Idemitsu Kosan Co.,Ltd.)
•Master Draw 5128 (Etna Products inc.)
•Shell Drawing XA (Shell)
* Mixing amount of oil is 30mg/10m at maximum.
NOTE
1When selecting and using a copper tube, observe strictly the relevant standards or regulations of each country.
Refrigerant
R-22
(Single-component refrigerant)
R-407C
(Multiple-component refrigerant)
Refrigeration oil Mineral oil (Suniso) Synthetic (ether) oil
Condensing pressure 1.84MPa (18.8kg/cm
2
)2.01MPa (20.5kg/cm
2
)
Wall thickness of refrigerant pipe (Reference)
(Unit: mm)
.
Type O type 1/2H and H type
Copper tube O.D. ø 6.4 ø 9.5 ø 12.7 ø 15.9 ø 19.1 ø 22.2 ø 25.4 ø 28.6 ø 34.9 ø 41.3
Copper tube W.T. 0.8 0.8 0.8 1.0 1.0 1.0 1.0 1.2 1.3 1.7
To Next Page
Loading...
