6 Preparation
Installer reference guide
19
EPGA11~ EA9W
Daikin Altherma – Low temperature split
4P556075-1 – 2019.02
INFORMATION
If you have limited installation space, do the following
before installing the unit in its final position:
connect the drain hose to the drain" on page 26
. It
requires to remove one or both side panels.
▪ The foundation must be strong enough to bear the weight of the
unit. Take the weight of the unit with a domestic hot water tank full
of water into account.
Make sure, in the event of a water leak, water cannot cause any
damage to the installation space and surroundings.
Do NOT install the unit in places such as:
▪ In places where a mineral oil mist, spray or vapour may be
present in the atmosphere. Plastic parts may deteriorate and fall
off or cause water leakage.
▪ Sound sensitive areas (e.g. near a bedroom), so that the
operation noise will cause no trouble.
▪ In places with high humidity (max. RH=85%), for example a
bathroom.
▪ In places where frost is possible. Ambient temperature around the
indoor unit must be >5°C.
NOTICE
When the temperature in multiple rooms is controlled by 1
thermostat, do NOT place a thermostatic valve on the
emitter in the room where the thermostat is installed.
6.3
Preparing water piping
6.3.1
Water circuit requirements
INFORMATION
Also read the precautions and requirements in the
"General safety precautions" chapter.
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 entering the pipe.
▪ Use a decent thread sealant to seal connections.
▪
Insulation.
Insulate up to the base of the heat exchanger.
▪
Freeze.
Protect against freezing.
▪
Closed circuit.
Use the indoor unit ONLY in a closed water
system. Using the system in an open water system will lead to
excessive corrosion.
▪
Piping length.
It is recommended to avoid long runs of piping
between the domestic hot water tank and the hot water end point
(shower, bath,…) and to avoid dead ends.
▪
Piping diameter.
Select the water piping diameter in relation to
the required water flow and the available external static pressure
of the pump. See
"14 Technical data" on page 79
for the external
static pressure curves of the indoor unit.
▪
Water flow.
You can find the minimum required water flow for
indoor unit operation in the following table. In all cases, this flow
needs to be guaranteed. When the flow is lower, the indoor unit
will stop operation and display error 7H.
Minimum required flow rate
20 l/min
▪
Field supply components – Water.
Only use materials that are
compatible with water used in the system and with the materials
used in the indoor unit.
▪
Field supply components – Water pressure and temperature.
Check that all components in the field piping can withstand the
water pressure and water temperature.
▪
Water pressure.
The maximum water pressure is 4 bar. Provide
adequate safeguards in the water circuit to ensure that the
maximum pressure is NOT exceeded.
▪
Water temperature.
All installed piping and piping accessories
(valve,
connections,…)
MUST
withstand
the
following
temperatures:
INFORMATION
The following illustration is an example and might NOT
match your system layout.
89°C
75°C
M
M
a
b
c
d
g
e
h
i
i
i
j
j
f
k
i
HPC1
FHL1
FHL2 FHL3
HPC2
HPC3
a
Outdoor unit
b
Indoor unit
c
Heat exchanger
d
Backup heater
e
Motorised 3‑way valve (switch between space heating and
domestic hot water)
f
Motorised 3‑way valve (mixing the main zone)
g
Main pump
h
Additional pump
i
Shut-off valve
j
Collector (field supply)
k
Domestic hot water tank
HPC1...3
Heat pump convector (field supply)
FHL1...3
Floor heating loop (field supply)
▪
Drainage – Low points.
Provide drain taps at all low points of the
system in order to allow complete drainage of the water circuit.
▪
Drainage – Pressure relief valve.
Connect the drain hose
properly to the drain to avoid water dripping out of the unit. See
"7.4.4 To connect the drain hose to the drain" on page 26
.
