ENGLISH-41
02
INST
ALL
ATION
C
o
llecting refrigerant in refrigerant vessel bef
o
re pump d
o
wn
o
perati
o
n
If the am
o
unt
o
f refrigerant in the system exceeded the maximum all
o
wable limit, reduce the am
o
unt
o
f the refrigerant
by f
o
ll
o
wing the bel
o
w instructi
o
n bef
o
re pump d
o
wn
o
perati
o
n.
1. Prepare an exclusive rechargeable refrigerant vessel, scale and a manifold gauge.
2. Check the amount of refrigerant in the entire system.
3. Connect a refrigerant vessel to an outdoor unit and operated about 50
% of the indoor unit in cooling mode.
4. After 10 minutes of cooling operation, check the pressure on high pressure side with the manifold gauge. If the pressure
on the high pressure side is over 3.0 MPa (30.59 kgf/cm
²
),g reduce the number of operating indoor unit to decrease the
pressure below 3.0 MPa (30.59 kgf/cm
²
).
5. When the pressure becomes lower than 3.0 MPa (30.59 kgf/cm
²
) open the manifold gauge valve
②
which is connected
to a liquid side. Then, open the valve on the refrigerant vessel for the refrigerant to
fl
ow from the liquid side pipe to a
vessel.
6. Check the weight di
ff
erence with the scale. When desired amount of the refrigerant is collected into the vessel, close the
valve and remove the manifold gauge.
7. Make sure that the amount of the refrigerant in the vessel is about 50
% of the entire system.
8. Measure the amount of refrigerant correctly to not exceed amount of collected refrigerant.
R-410A
Refrigerant
vessel valve
Valve
①
Scale
Manifold gauge
Service valve
Outdoor unit
Gas side
Liquid side
Valve
②
