Refrigerant Piping Connection - Carrier 42HQV025 Installation Manual

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
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
AIR PURGE
Warp
Using a vacuum pump
Compound pressure gauge
–101 kPa
(–76 cmHg)
Handle Lo
Charge hose
(For R410A only)
Connecting
pipe
CAUTION
• KEEP IMPORTANT 4 POINTS FOR PIPING WORK.
Evacuating
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
Packed valve at liquid side
Packed valve at gas side
Service port (Valve core (Setting pin))