York YFFE18BXEXBH-RX - Purge and Vacuum

Purge and Vacuum
Connect gauge and pump as figure, step1.
1
.
Open low-pressure gauge,and
2
.
operate vacuum pump. If the scale-
moves of
gause (Iow) reach vacuum condition in a moment, tighten joints.
When pressure is 10 Pa ,stop pump and close joint, wait for 5 minutes, the
pressure is not over 15 Pa.
3
.
Open the valve rod for the liquid valve to an angle of
4
.
anticlockwise 90 degrees.
After 6 seconds, close the
2-way valve and make the
inspection of gas leakage.
Open
No gas leakage?
5
.
Detach the charge hose
6
.
from the service port,
open liquid valve and
gas valve
.Turn
the valve rod anticlockwise until hitting lightly.
In case of gas leakage, tighten parts of piping joint. If
leakage stops, then proceed step 6.
If it does not stop gas leakage, discharge whole refrigerants
from the service
port. Repeat piping procedure and vacuumize.
Pressure Gauge (for
R410A)
Liquid Side Valve
Gas Side Valve
Vacuum pump (for R410A)
Tube (for R410A)
Close
Liquid
Liquid
Liquid
valve
Gas
Gas
Gas
valve
Open 90
O
valve
valve
Liquid valve
Gas valve
valve
valve
Valve cap
Valve cap
Service port cap
To prevent the gas
leakage, close service
port s cap.
After attaching the each cap, check the gas leakage around the caps.
7
.
8
.
Step 1.
Step 2.
Step 3.
Step 7.
Step 6.Step 5.
Step 4.
CAUTION
27
When connecting YSM3F50AAS, please charge additional 100g refrigerant.
If the refrigerant of the air conditioner leaks, it is necessary to discharge all the refrigerant.
Vacuum first, then charge the liquid refrigerant into air conditioner according to the amount
marked on the nameplate.
Please do not let other cooling medium, except specified one (R410A), or air enter into the
cooling circulation system. Otherwise, there will be abnormal high pressure in the system that
will crack it and lead to personal injuries.