Inverter Hybrid Boiler
30
Precautions for refrigerant piping
● As R410A refrigerant has a strong hygroscopic property, do not expose the valve
and piping to the atmosphere for a long time.
● Use dedicated tools for R410A when installing the product.
● For more information about the installation and characteristics of R410A product,
please see the service guide of Carrier inverter air conditioning system.
Attention
There should be no moisture or
dust.
1
There should be no leakage, or
use of mineral oil.
2
It should be precisely and
accurately processed.
Vacuum using a vacuum pump
before charging refrigerant.
3
5
Nitrogen welding
Charge refrigerant in a liquid
state. (Do not charge refrigerant
in a gaseous state)
4
6
Refrigerant piping