Daikin EHYHBX08AFV3 [79/252] Charging refrigerant

7 | Installation

Installer reference guide

EVLQ05+08CAV3 + EHYHBH05AF + EHYHBH/X08AF + EHYKOMB33AA

Daikin Altherma hybrid heat pump

4P355634-1F – 2020.10

7.9 Charging refrigerant

7.9.1 About charging refrigerant

The outdoor unit is factory charged with refrigerant, but in some cases the

following might be necessary:

What When

Charging additional refrigerant When the total liquid piping length is

more than specified (see later).

Completely recharging refrigerant Example:

▪ When relocating the system.

▪ After a leak.

Charging additional refrigerant

Before charging additional refrigerant, make sure the outdoor unit's external

refrigerant piping is checked (leak test, vacuum drying).

INFORMATION

Depending on the units and/or the installation conditions, it might be necessary to

connect electrical wiring before you can charge refrigerant.

Typical workflow – Charging additional refrigerant typically consists of the following

stages:

1 Determining if and how much you have to charge additionally.

2 If necessary, charging additional refrigerant.

3 Filling in the fluorinated greenhouse gases label, and fixing it to the inside of

the outdoor unit.

Completely recharging refrigerant

Before completely recharging refrigerant, make sure the following is done:

1 All refrigerant is recovered from the system.

2 The outdoor unit's external refrigerant piping is checked (leak test, vacuum

drying).

3 Vacuum drying on the outdoor unit's internal refrigerant piping is performed.

NOTICE

Before completely recharging, perform vacuum drying on the outdoor unit's internal

refrigerant piping as well.

Typical workflow – Completely recharging refrigerant typically consists of the

following stages:

1 Determining how much refrigerant to charge.

2 Charging refrigerant.

3 Filling in the fluorinated greenhouse gases label, and fixing it to the inside of

the outdoor unit.