Immergas AUDAX PRO 4 V2 - 12 “Pump Down” Execution; Collect the Refrigerant in a Specific Vessel before Pump down

64
R-32
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12.3 COLLECT THE REFRIGERANT IN A SPECIFIC
VESSEL BEFORE “PUMP DOWN”.
If the amount of refrigerant in the system exceeds the maximum
allowed limit, reduce the amount of refrigerant by following the
instructions below before performing the pump down operation.
1. Prepare a cylinder approved for refrigerant recovery, a scale
and a pressure gauge.
2. Check the amount of refrigerant in the entire system.
3. Connect the recovery cylinder to the outdoor unit and manage
the indoor unit in cooling mode.
4. Aer 10 minutes of operation in cooling mode, check the
pressure on the high-pressure side using the pressure gauge. If the
pressure on the high-pressure side is higher than 3.0 MPa (30.59
kgf/cm
2
), approach the water setpoint to drop the pressure below
3.0 MPa (30.59 kgf/cm
2
).
5. When the pressure drops below 3.0 MPa (30.59 kgf/cm
2
) open
the valve of the pressure gauge (2) which is connected to the liquid
side. en open the valve on the refrigerant vessel to transfer the
refrigerant from the liquid side pipe to the vessel.
6. Use the scale to check the weight dierence. When the desired
amount of refrigerant is collected in the recovery cylinder, close
the valve and remove the manifold pressure gauge.
7. Make sure that about half the refrigerant of the entire system
is collected in the recovery cylinder.
8. Correctly measure the amount of refrigerant so as not to exceed
the collected amount.
Manifold pressure gauge
Gas side
Valve (1)
Valve (2)
Scale
Liquid side
Service valve
Outdoor unit
Refrigerant
recipient valve