AUX ANB66FVAMT User Manual

AUX-DC inverter ARV outdoor unit individual series technical manual
104
3.6 Connection and Welding of pipe
Requirement for flaring opening connection:
 Deburr the pipe before flaring, then flare pipe with flaring tool as per the dimensions of flaring opening
inthe following table:
 Apply a thin layer of refrigeration oil on both inside and outside at the flaring part;
 Align flaring opening with threaded joint of indoor unit, manually and tightly screw flared nut, then
screw with torque wrench as per the tightening torque in the following table.
 Remove the cap on liquid and gasstop valve, align flaring opening with stop valve of outdoor unit,
sufficiently screw fared nut with hand, and then screw with torque wrench as per the tightening torque
in the following table.
 It is required to weld before system connection and purge with nitrogen to prevent oxidation layer formed
inside copper pipe when welding.
Diameter of pipe
Tightening
torque
Machining
dimension of flared
section (A)
Shape of flaring
opening
Apply oil
1/4in(φ6.35mm)
15-19 (N·m)
8.8-9.1mm
3/8in(φ9.52mm)
35-40 (N·m)
12.8-13.2mm
1/2in(φ12.7mm)
50-60 (N·m)
16.2-16.6mm
5/8in(φ15.88mm)
68-80 (N·m)
19.2-19.6mm
3/4in(φ19.05mm)
100-120 (N·m)
23.6-24mm
3.7 Gas Tightness Test
 Purpose: To confirm whether there is leakage in pipe by using nitrogen, and the steps are as follows:
l
Gas valve

AUX ANB66FVAMT Specifications

General

Brand	AUX
Model	ANB66FVAMT
Category	Air Conditioner
Language	English