Daikin RXM35R5V1B [45/68] Precautions when charging refrigerant

8 | Charging refrigerant

Installer reference guide

RXJ-M(9)_RXA-A(9)_RXM-R(9)_ARXM-R(9)

R32 Split system air conditioners

4P519439-12M – 2021.02

8.3 Precautions when charging refrigerant

INFORMATION

Also read the precautions and requirements in the following chapters:

▪ "2General safety precautions"[45]

▪ "7.1Preparing refrigerant piping"[433]

8.4 To determine the additional refrigerant amount

If the total liquid piping

length is…

Then…

≤10m Do NOT add additional refrigerant.

>10m R=(total length (m) of liquid piping⁠–⁠10m)×0.020

R=Additional charge (kg) (rounded in units of

0.01kg)

INFORMATION

Piping length is the one-way length of liquid piping.

8.5 To determine the complete recharge amount

INFORMATION

If a complete recharge is necessary, the total refrigerant charge is: the factory

refrigerant charge (see unit name plate) + the determined additional amount.

8.6 To charge additional refrigerant

WARNING

▪ Only use R32 as refrigerant. Other substances may cause explosions and

accidents.

▪ R32 contains fluorinated greenhouse gases. Its global warming potential (GWP)

value is 675. Do NOT vent these gases into the atmosphere.

▪ When charging refrigerant, ALWAYS use protective gloves and safety glasses.

CAUTION

To avoid compressor breakdown, do NOT charge more than the specified amount of

refrigerant.

Prerequisite: Before charging refrigerant, make sure the refrigerant piping is

connected and checked (leak test and vacuum drying).

1 Connect the refrigerant cylinder to the service port.

2 Charge the additional refrigerant amount.

3 Open the gas stop valve.