SiBE811001EB
Test Operation
CONVENI-PACK
50
(2) Refrigerant charging procedure
(1) Charge the refrigerant from the liquid refrigeration stop valve service port.
(2) When the calculated refrigerant volume cannot be charged, continue to charge the refrigerant while running the unit
as outlined in the steps below.
While the operation switch remains OFF, power-ON the outdoor unit/indoor unit (air-conditioner/refrigeration
showcase/refrigeration unit cooler) / defrost control board and fix the system. (Time taken to fix the system is
approximately 10 minutes.)
Fully open the gas stop valves (both on the air conditioning side and the refrigeration side) and the liquid stop
valve (on the air conditioning side), and fully close the liquid stop valve (on the refrigeration side).
Set the operation switch of the outdoor unit to MANUAL, then charge the calculated refrigerant volume while the
unit is running.
Once the operation switch is turned OFF, fully open the liquid stop valve (on the refrigeration side).
With the operation switch set to MANUAL, turn the air conditioning remote controller on and verify if a sealed
state is reached using the sight glass of the outdoor unit. (Refer to < Checking the refrigerant using the sight
glass > below)
If there is not enough refrigerant, turn the operation switch OFF and again fully open the liquid stop valve
(refrigeration side). Add the refrigerant while following the "Additional refrigerant charging amount calculation
procedure" on the additional refrigerant charging label.
Repeat steps
to
until a sealed state is reached.
Caution: Ensure the upper volume limit of the additional refrigerant is less than or equal to [P + C × 0.1].
A: Volume of onsite additional refrigerant amount calculated according to the piping and units.
Once the designated refrigerant amount has been charged, turn the operation switch OFF on the outdoor unit.
The outdoor unit fan may continue to spin for a while after running has stopped.
Fully open the gas and liquid stop valves immediately (the pipes can be damaged by a build-up of liquid).
<Precautions regarding the refrigerant cylinder>
When charging the refrigerant check there is a siphon tube attachment on the cylinder prior to charging, and position the
cylinder so that the refrigerant will fill in liquid form. (Refer to the table below)
As R-410A is a mixed refrigerant, should charging occur while in a gaseous state the refrigerant composition will
change leading to possible running problems.
<Checking the refrigerant using the sight glass>
Caution
After charging additional refrigerant, fully open the liquid and gas stop valves
(If the unit is run while these stop valves are closed, the compressor will be damaged.)
Ensure you apply screw-lock agents to the attachment section of the valve caps and
screws of the service port
(If this is not applied, there is a chance condensation water will leak into the inside of the unit
and freeze, changing the shape or damaging the valve caps leading to refrigerant gas leaks
and/or damage to the compressor.)
When using a cylinder
with a siphon tube attachment
When using other cylinders
Charge while the cylinder is
standing upright.
There is a siphon tube on the
inside, so liquid charging is
possible without turning upside
down
Charge while the cylinder is
turned upside down.
Be careful that the cylinder does
not fall over.
( )
( )
Full of liquid
Sealed state (O)
Shortage of refrigerant (X)
Sight glass
Bubbles come
out at all time
A few bubbles
flowing
