Step 7 Connecting The Refrigerant Pipes; Step 8 Performing The Gas Leak Test - Samsung AC TNPPEH Series User & Installation Manual

Installation Procedure
5 Check that the flaring is correct, referring to the
illustrations below for examples of incorrect flaring.
Correct Inclined

Step 7 Connecting the refrigerant pipes

1 Connect each assembly pipe to the appropriate valves on
the indoor and outdoor units and fasten the flare nuts.
2 As depicted in the illustration below, tighten the flare
nut manually, and then apply the following torque with a
torque wrench.
Liquid side
service valve
Outer Diameter
(D, mm)
6.35
9.52
12.7
15.88
19.05
38
English
DB68-09343A-00_IBIM_PAC 미라지 이집트파키스탄_IQ_EN.indd 38
Damaged Cracked Uneven
Surface Thickness
Gas side
service valve
Fastening torque (N·m)
14 to 18
34 to 42
49 to 61
68 to 82
100 to 120
WARNING
• During installation, make sure that there is no gas
leakage. When collecting refrigerant, first stop the
compressor. If the refrigerant pipe is not properly
connected and compressor runs with the service valve
open, the pipe takes in air and the pressure rises,
which may cause explosion or injury.
CAUTION
• Be sure to use C1220T-1/2H (Semi-hard) pipe for more
than Ø19.05 mm. If you use C1220T-O (Soft) pipe for
Ø19.05 mm, the pipe may be broken, which can result
in an injury.

Step 8 Performing the gas leak test

To identify potential gas leaks on the indoor unit, inspect
the connection area of each refrigerant pipe using a leak
detector for R-410A.
Before recreating the vacuum and recirculating the
refrigerant gas, pressurize the whole system with nitrogen
(using a cylinder with a pressure reducer) at a pressure
above 0.2 MPa, less than 4 MPa (gauge) in order to
immediately detect leaks on the refrigerant fittings.
Made vacuum for 10 minutes and pressurizing system with
nitrogen.
Gas side
Liquid side
2020-07-28 오전 11:08:50