Panasonic CS-RZ35WKRW Service Manual

Also see for CS-RZ25WKRW: Operating instructions

753. Torque wrenches (diameters 1/2, 5/8)In order to strengthen the compressive strength, thediameters of wrenches change depending on the flarenut sizes.Torque wrenchesDifferences in torque wrenchesR32(common R410A) R221/2(diameter × torque)26 mm × 55 N•m(550 kgf•cm)24 mm × 55 N•m(550 kgf•cm)5/8(diameter × torque)29 mm × 65 N•m(650 kgf•cm)27 mm × 65 N•m(650 kgf•cm)4. Manifold gaugesR22 gauges cannot be used because of the highpressures.Each port of manifold has different shapes in orderto prevent inserting wrong refrigerant.*However, the port shape for R410A and R32 is thesame; therefore, attention need to be paid not to insertwrong refrigerant.Differences in high/low pressure gaugesR32(common R410A) R22High pressuregauges (red)-0.1 ~ 5.3 MPa-76 cmHg ~ 53 kgf / cm 2 -76 cmHg ~ 35 kgf / cm 2Low pressuregauges (blue)-0.1 ~ 3.8 MPa-76 cmHg ~ 38 kgf / cm 2 -76 cmHg ~ 17 kgf / cm 2Difference in manifold port sizesR32(common R410A) R22Port sizes 1/2 UNF20 7/16 UNF205. Charging hosesThe pressure resistance of charge hoses is increased.At the same time, the material is changed to HFCresistant, and the size of each manifold adopter ischanged, as the port size of manifold gauge itself.Further, some hoses are with anti-gas pressurebackflow valves placed near the adopters. (hoses withthe valves recommended)Manifold gauges / Charging hosesDifferences in charging hosesR32(common R410A) R22PressureResistanceNormaloperationpressure5.1 MPa(52 kgf / cm 2)3.4 MPa(35 kgf / cm 2)Burstpressure27.4 MPa(280 kgf / cm 2)17.2 MPa(175 kgf / cm 2)MaterialHNBR rubberInternal nyloncoatingNBR rubber6. Vacuum pump and Vacuum pump adopterWhen using a vacuum pump, it is necessary to set asolenoid valve in order to prevent backflow of vacuumpump oil into the charge hoses, and use a vacuumpump with oil backflow prevention function, or use thevacuum pump with vacuum pump adopter.If vacuum pump oil（mineral oil-based）mixes withR410A (R32), it may cause damage to the machine.Vacuum pumpVacuum pump adopter