Daikin ARXTP25R2V1B [11/68] General safety precautions

2 | General safety precautions

Installer reference guide

RXTM-R_RXTP-R_ARXTP-R_RXTA-B

R32 split series

4P518023-11H – 2021.03

2.1.3 Refrigerant — in case of R410A or R32

If applicable. See the installation manual or installer reference guide of your

application for more information.

NOTICE

Make sure refrigerant piping installation complies with applicable legislation. In

Europe, EN378 is the applicable standard.

NOTICE

Make sure the field piping and connections are NOT subjected to stress.

WARNING

During tests, NEVER pressurize the product with a pressure higher than the

maximum allowable pressure (as indicated on the nameplate of the unit).

WARNING

Take sufficient precautions in case of refrigerant leakage. If refrigerant gas leaks,

ventilate the area immediately. Possible risks:

▪ Excessive refrigerant concentrations in a closed room can lead to oxygen

deficiency.

▪ Toxic gas might be produced if refrigerant gas comes into contact with fire.

DANGER: RISK OF EXPLOSION

Pump down – Refrigerant leakage. If you want to pump down the system, and there

is a leak in the refrigerant circuit:

▪ Do NOT use the unit's automatic pump down function, with which you can collect

all refrigerant from the system into the outdoor unit. Possible consequence: Self-

combustion and explosion of the compressor because of air going into the

operating compressor.

▪ Use a separate recovery system so that the unit's compressor does NOT have to

operate.

WARNING

ALWAYS recover the refrigerant. Do NOT release them directly into the environment.

Use a vacuum pump to evacuate the installation.

NOTICE

After all the piping has been connected, make sure there is no gas leak. Use nitrogen

to perform a gas leak detection.

NOTICE

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

of refrigerant.

▪ When the refrigerant system is to be opened, refrigerant MUST be treated

according to the applicable legislation.