Mitsubishi SRK10CES, Техническое руководство

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Always use a Torque wrench and back up spanner to tighten the flare nut.
(c) Air purge
(i) Tighten all flare nuts in the pipings both indoor and outside will so as not to cause leak.
(ii) Connect service valve, charge hose, manifold valve and vacuum pump as is illustrated below.
(iii) Open manifold valve handle Lo to its full width, and perform vacuum or evacuation.
Continue the vacuum or evacuation operation for 15 minutes or more and check to see that the vacuum gauge reads – 0.1 MPa
(– 76 cmHg).
(iv) After completing vacuum operation, fully open service valve (Both gas and liquid sides) with hexagon headed wrench.
(v) Check for possible leakage of gas in the connection parts of both indoor and outdoor.
(b) Connection of refrigerant piping
Indoor unit side
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Connect firmly gas and liquid side
pipings by Torque wrench.
Outdoor unit side
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Connect firmly gas and liquid side
pipings by Torque wrench.
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Specified torquing value:
Liquid side (ø6.35) : 15.7~19.6N·m (1.6~2.0kgf·m)
Gas side (ø9.52)
: 29.4~39.2N·m (3.0~4.0kgf·m)
(ø12.7) : 39.2~49.0N·m (4.0~5.0kgf·m)
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Use one more spanner to fix the valve.
Spanner
(for fixing
the piping)
Torque
wrench
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Specified torquing value:
Liquid side (ø6.35) : 15.7~19.6N·m (1.6~2.0kgf·m)
Gas side (ø9.52)
: 29.4~39.2N·m (3.0~4.0kgf·m)
(ø12.7) : 39.2~49.0N·m (4.0~5.0kgf·m)
Manifold
Valve
-76 cm Hg
Handle Lo
(pressure)
Charge hose
Stop valve
(Two-way valve)
Service port
Stop valve
(Three-way
valve)
Compound
(Gauge) Pressure
gauge
Handle Hi
(pressure)
Charge hose
Vacuum pump
♦
Additional refrigerant charge
When refrigerant piping exceeds 7.5m conduct additional refrigerant charge after refrigerant sweeping.
7.5m over 10m:Additional charge amount per meter = 10g/m
10m over 15m:Additional charge amount per meter=30g/m
[Example]
How much amount of additional charge for 15m piping?
(10 – 7.5)m
×
10g/m+(15-10)m
×30
g/m=175g 175g for additional charge
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All models
(d) Insulation of connecting portion
(i) Cover the connecting portion of the refrigerant piping with the pipe cover and seal them.
If neglecting to do so, moisture occurs on the piping and water will drip out.
Vinyl tape
To cover the connecting portion with
insulation material materials, cut upper portion
and then seal it with insulation materials.