Refrigerant Piping Connection - Carrier 42HQV025 Manuel D'installation

Refrigerant Piping Connection

Flaring
90
• Projection margin in flaring : A (Unit : mm)
Outer dia.
R410A tool used
of copper pipe
Outer dia. of copper pipe
Die
Pipe
Tightening connection
Half union
Externally
threaded side
Use a wrench to secure.
CAUTION
Outer dia. of copper pipe
∅
∅
∅
• Tightening torque of flare pipe connections
Shaping pipes
Obliquity
Roughness Warp
Conventional tool used
R410A
Flare nut
Internally
threaded side
Use a torque wrench to tighten.
Tightening torque
Flare at
indoor unit side
Flare at
outdoor unit side
Incused line
Evacuating
AIR PURGE
Using a vacuum pump
Compound pressure gauge
–101 kPa
(–76 cmHg)
Handle Lo
Charge hose
(For R410A only)
Connecting
pipe
Packed valve at liquid side
Packed valve at gas side
Service port (Valve core (Setting pin))
CAUTION
• KEEP IMPORTANT 4 POINTS FOR PIPING WORK.
Pressure gauge
Manifold valve
Handle Hi
(Keep full closed)
Charge hose
(For R410A only)
Vacuum pump adapter for
counter-flow prevention
(For R410A only)
Vacuum
pump