INSTALLATION MANUAL FOR OUTDOOR UNIT
Step 1:Charge for more than 3 minutes under 0.3MPa(3.0kg/cm
Step 2:Charge for more than 3 minutes under 1.5MPa(15kg/cm
-----------Serious leakage may be found.
Step 3:Charge for more than 24 hours under 3.0MPa(3.0kg/cm
----------Small leakage may be found.
Check for pressure decrease
Without pressure decrease-Pass
With pressure decrease-Check for leaage.
There will be a 0.01MPa(0.1kg/cm 2 g) pressure change for every 1 C ambient temperature change
during the 24-hour pressure charge.It should be corrected during the test.
Check for leakage
In the case of pressure decrease during steps 1 to 3 ,check the joints with the ear,hand or soapsuds
for leakage.Repair it by welding or tighten the connecting nut up.
Use vacuum pump to evacuate the air.Never use the refrigerant for the evacuation.
Drain off the nitrogen gas after the leak test and then connect the vacuum pump as shown in the figure
The vacuum pumping must be done from both the liquid and gas inlets.
To the gauge
(Liquid side)access hole
(Liquid side)three-way valve
Detailed diagram of the
(Gas side )access hole
(Gas side)three-way valve
Three-way valve fully
Three-way valve fully closed
To the unit
6.4 Copper pipe