Mitsubishi Heavy Industries SRRM40HENG-L, Руководство пользователя

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FDC-HKX
892
(5) Air-tight test
(a) When conducting an air-tight test of local piping, connect the piping to the check joint of the evacuating pipe connected to the
gas side service valve, and keep the service valve closed. The air-tight test pressure shall be 2.94MPa [R407C : 3.23MPa]
(b) To conduct the test, pressurize the check joint of evacuating pipe by nitrogen gas as shown below. The local piping including
indoor units can be tested as for airtightness.
(4) Heat insulation
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Exterior tape
Use insulation material with good resistance heat properties (120 ˚C or more).
Gas lines
Liquid piping
Wires for connecting indoor
and outdoor units
Insulation
(i) There is a need to insulate both gas and liquid piping with heat insulation for protection against heat and
condensation.
1) Always use heat insulation to prevent condensation on the gas piping from becoming drain water and
causing leakage during cooling and to prevent people from being burned by the high temperature of the
surface of the gas piping as discharge gas flows through it.
2) Use heat insulation (pipe cover) on the flare connection sections of the indoor unit.
(Insulate both the gas and liquid piping.)
3) Insulate both the gas and liquid piping. Apply the insulation so that is tight against the piping and free
of gaps. Route the connecting wires with the insulation and wrap the entire bundle with exterior tape.
(c) Connection to rear, right and front directions.
1) See page 781 to 782 for locations of connecting holes and service valves.
Gas side service valve
Check joint
Press-
urizing
Indoor unit
Indoor unit
Outdoor unit
(b) Refrigerant connection piping.
Electric
wing
Electric
wing
Refrigerant
piping
Electric
wing
Refrigerant
piping
Refrigerant
piping Connection to
rear direction
Connection to
left direction
Connection to
front direction
Connection to
lower direction
Connection to
right direction