Johnson SUIT Serie Manual De Instrucciones página 42

4-12 Stop valve instructions
1) It is at its closed state when delivered;
2) Use a 6mm socket head wrench to open or close the valve, turn counterclockwise to open
it, and clockwise to close it;
3) After the operation is finished, the valve cover must be tightened;
4) In time of vacuum pumping and refrigerant filling through the service entrance, the R410A
special tool must be used. Fill in refrigerant through service entrance to the gas side valve, and
carry out vacuum pumping simultaneously at the liquid and gas side valves.
4-13 Piping insulation treatment
1) Apply insulation treatment to the gas and liquid side piping respectively;
2) Use obturator heat insulating materials, with the flame retardant grade of B1 and high temperature
resistance of 120℃;
3) When the copper pipe diameter ≤Φ12.7, the cotton insulation thickness shall be no less than 15mm;
the copper pipe diameter ≥Φ15.88, the cotton insulation thickness shall be no less than 20mm.
4) The indoor unit nut joints must accept heat insulation treatment.
4.Connecting pipe installation
Service entrance
Valve rod
Valve deck
Vacuum pumping here
Opening direction
(Liquid side)
Refrigerant filling here
Opening direction
(Gas side)
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V.1