Final Charge Adjustment - Daikin RR20AVAK9 Installation & Service Reference

1. 3/8" valve to 5 - 10 in-lbs
2. 5/8" valve to 5 - 20 in-lbs
3. 3/4" valve to 5 - 20 in-lbs
4. 7/8" valve to 5 - 20 in-lbs
Do not introduce liquid refrigerant from the cylinder into the
crankcase of the compressor as this may damage the
compressor.
1. Break vacuum by fully opening liquid and suction base valves.
2. Set thermostat to call for cooling. Check indoor and outdoor fan operation and allow system to stabilize for 10 minutes for
fixed orifices and 20 minutes for expansion valves.
Violation of EPA regulations may result in fines or other penalties.
Charge Verification

Final Charge Adjustment

The outdoor temperature must be 15°C (60°F) or higher. Set the room thermostat to COOL, fan switch to AUTO, and set the
temperature control well below room temperature.
After system has stabilized per startup instructions, check subcooling and superheat as detailed in the following section.
Fixed Orifice
1. Purge gauge lines. Connect service gauge manifold to base-
valve service ports. Run system at least 10 minutes to al-
low pressure to stabilize.
2. Temporarily install a thermometer 105 - 152 mm (4-6")
from the compressor on the suction line. Ensure the ther-
mometer makes adequate contact and is insulated for best
possible readings. Use vapor temperature to determine
superheat.
3. Refer to the superheat table provided for proper system superheat. Add charge to lower superheat or recover charge to raise
superheat.
4. Disconnect manifold set, installation is complete.
0.56-1.30 Nm
0.56-2.26 Nm
0.56-2.26 Nm
0.56-2.26 Nm
NOTICE
POSSIBLE REFRIGERANT LEAK
To avoid a possible refrigerant leak, open the service valves until
the top of the stem is 3.2 mm (1/8") from the retainer.
Operating the compressor with the suction valve closed will
cause serious compressor damage.
To prevent personal injury, carefully connect and disconnect
manifold gauge hoses. Escaping liquid refrigerant can cause burns.
Do not vent refrigerant into the atmosphere. Recover all
refrigerant during system repair and before final unit disposal.
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CAUTION
CAUTION
CAUTION
CAUTION