7 Installation
Installer reference guide
39
ERGA04~08DAV3(A) + EHBH/X04+08DA
Daikin Altherma – Low temperature split
4P496758-1 – 2017.12
7.7.3 To determine the additional refrigerant
amount
WARNING
If the total refrigerant charge in the system is ≥1.84 kg
(i.e. if the piping length is ≥27 m), you need to comply
with additional minimum floor area requirements for the
indoor unit. For more information, see "6.2.3 Installation
site requirements of the indoor unit"on page23.
If the total liquid
piping length is…
Then…
≤10m Do NOT add additional refrigerant.
>10m R=(total length (m) of liquid
piping–10m)×0.020
R=Additional charge (kg)(rounded in units
of 0.1kg)
INFORMATION
Piping length is the one way length of liquid piping.
7.7.4 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.
7.7.5 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.
If pump down is needed in case of dismantling or relocating the
system, see "13.2To pump down"on page88 for more details.
7.7.6 To fix the fluorinated greenhouse gases
label
1 Fill in the label as follows:
Contains fluorinated greenhouse gases
2
1
1
1
2
2
kg
tCO
2
eq
GWP × kg
1000
=
=
+
kg
=
kg
=
GWP: XXX
RXXX
a If a multilingual fluorinated greenhouse gases label is
delivered with the unit (see accessories), peel off the
applicable language and stick it on top of a.
b Factory refrigerant charge: see unit name plate
c Additional refrigerant amount charged
d Total refrigerant charge
e Greenhouse gas emissions of the total refrigerant charge
expressed as tonnes CO
2
-equivalent
f GWP = Global warming potential
NOTICE
In Europe, the greenhouse gas emissions of the total
refrigerant charge in the system (expressed as tonnes
CO
2
-equivalent) is used to determine the maintenance
intervals. Follow the applicable legislation.
Formula to calculate the greenhouse gas emissions:
GWP value of the refrigerant × Total refrigerant charge [in
kg] / 1000
2 Fix the label on the inside of the outdoor unit near the gas and
liquid stop valves.
7.8 Connecting the water piping
7.8.1 About connecting the water piping
Before connecting the water piping
Make sure the outdoor and indoor unit are mounted.
Typical workflow
Connecting the water piping typically consists of the following
stages:
1 Connecting the water piping to the indoor unit.
2 Connecting the drain hose to the drain.
3 Filling the water circuit.
4 Filling the domestic hot water tank.
5 Insulating the water piping.
7.8.2 Precautions when connecting the water
piping
INFORMATION
Also read the precautions and requirements in the
following chapters:
▪ General safety precautions
▪ Preparation
7.8.3 To connect the water piping
NOTICE
Do NOT use excessive force when connecting the piping.
Deformation of the piping can cause malfunctioning of the
unit.
To facilitate service and maintenance, 2 shut-off valves and 1
overpressure bypass valve are provided. Mount the shut-off valves
on the space heating water inlet and space heating water outlet. To
ensure the minimum flow rate (and prevent overpressure), install the
overpressure bypass valve on the space heating water outlet.
1 Install the shut-off valves on the water pipes.
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