If the system does not contain any refrigerant (e.g., after refrigerant reclaim operation), the unit must be charged
with its original amount of refrigerant (refer to the nameplate on the unit).
Only use R32 when adding refrigerant.
5.5.1 Fine-tuning of refrigerant charge while unit is operating
Use the 1/4” SAE Flare valve on the suction for fine-tuning of the refrigerant charge and make sure to charge the refrigerant in its
liquid state.
a. For fine-tuning of the refrigerant charge, the compressor must operate at full load (100%).
b. Verify the superheat and subcooling:
▪ superheat must be between 3 and 8 K
▪ subcooling must be between 3 and 8 K
Liquid temperature probe is not provided with the standard unit. To measure subcooling value, use an external measurement of liquid
temperature.
c. Verify the oil sight glass. Level must be within the sight glass.
d. As long as superheat and subcooling do not reach the indicated values in point (b), add refrigerant in steps of 500 g and
wait until the unit runs in stable conditions. Repeat the complete procedure step (e) until the subcooling and superheat
values are reached. ,
The unit must have the time to stabilize which means that this charging has to be done in a smooth way.
e. Note down the superheat and subcooling for future reference.
f. Fill out the total refrigerant charge on the unit nameplate and on the refrigerant charge label supplied with the product.
Take care for contamination of the remote condenser in order to avoid blocking of the system. It is impossible
for Daikin to control the contamination of the "foreign" condenser of the installer. The Daikin unit has a strict
contamination level.
5.5.2 Oil charge
The compressor of the EWLT version units is shipped with their proper charge of oil. The refrigerant circuits must not remain open to
the air for more than 15 minutes. If this happens you need to replace the oil charge as described in “MAINTENANCE” chapter of this
manual
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