a: Pressure gauge and leather hose: dedicated to R410A, pressure gauge measurement
range ≥ 4.0 MPa, and the leather hose tolerance range ≥ 4.5 MPa. The size of needle valve
in the unit is 1/4 inch. Purchase a conversion adapter if you have a different size of valve
on leather hoses.
b: Dry nitrogen.
c: Nitrogen reducing valve: A reducing valve must be installed on the head of the nitrogen
cylinder, and the reducing valve range ≥ 4.0 MPa.
d: Vacuum pump airflow: 2-4 L/s, absolute vacuum: ≤ 60 Pa.
e: For equipment with humidifiers, ensure that the water pipe thread sealant can resist
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