Daikin Altherma ERGA04E V3 Series, Installer'S Reference Manual

Page: 96 / 296

8 | Piping installation
Installer reference guide
96
ERGA04~08E + 23E
Daikin Altherma 3 R F
4P629090-1C – 2022.08
c Additional refrigerant amount charged
d Total refrigerant charge
e Quantity of fluorinated greenhouse gases of the total refrigerant charge
expressed as tonnes CO
2
equivalent.
f GWP = Global Warming Potential
NOTICE
Applicable legislation on fluorinated greenhouse gases requires that the refrigerant
charge of the unit is indicated both in weight and CO
2
equivalent.
Formula to calculate the quantity in CO
2
equivalent tonnes: GWP value of the
refrigerant × total refrigerant charge [in kg] / 1000
Use the GWP value mentioned on the refrigerant charge label.
2 Fix the label on the inside of the outdoor unit near the gas and liquid stop
valves.
8.5 Preparing water piping
▪ Valve towards expansion vessel. The valve towards the expansion vessel (if
equipped) MUST be open.
8.5.1 Water circuit requirements
INFORMATION
Also read the precautions and requirements in the "2 General safety
precautions" [ 4 10].
NOTICE
In case of plastic pipes, make sure they are fully oxygen diffusion tight according to
DIN 4726. The diffusion of oxygen into the piping can lead to excessive corrosion.
▪ Connecting piping – Legislation. Make all piping connections in accordance with
the applicable legislation and the instructions in the "Installation" chapter,
respecting the water inlet and outlet.
▪ Connecting piping – Force. Do NOT use excessive force when connecting the
piping. Deformation of the piping can cause malfunctioning of the unit.
▪ Connecting piping – Tools. Only use appropriate tooling to handle brass, which is
a soft material. If NOT, pipes will get damaged.
▪ Connecting piping – Air, moisture, dust. If air, moisture or dust gets into the
circuit, problems may occur. To prevent this:
- ONLY use clean pipes.
- Hold the pipe end downwards when removing burrs.
- Cover the pipe end when inserting it through a wall, to prevent dust and/or
particles from entering the pipe.
- Use a decent thread sealant to seal connections.
- When using non-brass metallic piping, make sure to insulate both materials
from each other to prevent galvanic corrosion.
- Because brass is a soft material, use appropriate tooling for connecting the
water circuit. Inappropriate tooling will cause damage to the pipes.