Table of Contents
Advertisement
Step 7 Connecting the assembly
pipes to the refrigerant pipes
There are two refrigerant pipes of different diameters :
• A smaller one for the liquid refrigerant
• A larger one for the gas refrigerant
• The inside of copper pipe must be clean & has no
dust
1 Remove the pinch pipes and connect the
assembly pipes. First tighten the flare nuts
manually and then with a torque wrench and
a spanner applying the following torque.
Refrigerant oil
Torque wrench
Flare nut
Outer diameter (D)
Ø1/4 inch
Ø3/8 inch
Ø1/2 inch
Ø5/8 inch
NOTE
• If the pipes must be shortened refer to page 10,
Step 6 Cutting and flaring the pipes
2 Use insulation that is thick enough to cover
the refrigerant pipe to prevent condensate
water on the outside of pipe and to ensure
system efficiency. Condensation can drip onto
the floor causing property damage or a slip
hazard.
3 Cut off any excess foam insulation.
4 Make sure that the bent sections of pipe are
5 It is necessary to double the insulation
6 Do not use joints or extensions for the pipes
Spanner
Union
Torque (lbf·ft)
10 to 13
• The designs and shape are subject to change
25 to 30
35 to 44
Step 8 Performing the gas leak test
49 to 59
Pressure check the refrigerant system using high pressure
nitrogen in order to detect basic refrigerant leaks.
Before performing the vacuum process and releasing the
factory R-410A charge into the refrigerant pipes, it is the
responsibility of the installer to pressurize the whole system
with nitrogen (using a cylinder with pressure reducer) at a
pressure above 580.2 psi (gauge).
not kinked or cracked.
thickness(10mm or more) to prevent
condensation even on the insulator when if
the installed area is warm and humid.
that connect the indoor and outdoor unit.
Gas refrigerant port
Drain hose
connection port
NOTE
according to the model.
Liquid refrigerant port
11
English
Advertisement
Table of Contents
