Daikin Altherma 3 H HT EPRA18DAV3 Manuel D'installation page 10

5 Electrical installation
▪ Normally closed valves (located indoors near the piping entry/exit
points) can prevent that all water from indoor piping is drained
when the freeze protection valves open.
NOTICE
When freeze protection valves are installed, do NOT select
a minimum cooling setpoint lower than 7°C (7°C=default).
If lower, freeze protection valves can open during cooling
operation.
For more information, see the installer reference guide.
4.1.4 To insulate the water piping
The piping in the complete water circuit MUST be insulated to
prevent condensation during cooling operation and reduction of the
heating and cooling capacity.
Outdoor water piping insulation
NOTICE
Outside piping. Make sure the outside piping is insulated
as instructed to protect against hazards.
For piping in free air, it is recommended to use the insulation
thickness as shown in below table as a minimum (with λ=0.039 W/
mK).
Piping length (m)
<20
20~30
30~40
40~50
For other cases the minimum insulation thickness can be determined
using the Hydronic Piping Calculation tool.
The Hydronic Piping Calculation tool also calculates the maximum
hydronic piping length from the indoor unit to the outdoor unit based
on the emitter pressure drop or the other way around.
The Hydronic Piping Calculation tool is part of the Heating Solutions
Navigator which can
professional.standbyme.daikin.eu.
Please contact your dealer if you have no access to Heating
Solutions Navigator.
This recommendation ensures good operation of the unit, however,
local regulations may differ and shall be followed.
5 Electrical installation
DANGER: RISK OF ELECTROCUTION
WARNING
Rotating fan. Before powering ON or servicing the outdoor
unit, make sure that the discharge grille covers the fan as
protection against a rotating fan. See:
▪ "6.2 To install the discharge
▪ "6.3 To remove the discharge grille, and put the grille in
position" [ 4 15]
safety
WARNING
ALWAYS use multicore cable for power supply cables.
CAUTION
Do NOT push or place redundant cable length in the unit.
Installation manual
10
Minimum insulation thickness
(mm)
19
32
40
50
be reached via https://
grille" [ 4 14]
NOTICE
The distance between the high voltage and low voltage
cables should be at least 50 mm.
5.1 About electrical compliance
Only for EPRA14~18DAV3
Equipment complying with
International Technical Standard setting the limits for harmonic
currents produced by equipment connected to public low-voltage
systems with input current >16 A and ≤75 A per phase.).
5.2 Guidelines when connecting the
electrical wiring
Tightening torques
Outdoor unit:
Item
M4 (X1M, X2M)
M4 (earth)
5.3 To connect the electrical wiring to
the outdoor unit
1 Open the switch box cover. See
unit" [ 4 8].
2 Insert the cables at the back of the unit, and route them through
the factory-mounted cable sleeves into the switch box. For the
power supply, use the factory-mounted cable.
c2
b2
a2
a1+a2 Power supply cable (factory-mounted cable)
b1+b2 Interconnection cable (field supply)
c1+c2 (optional) Drain tube heater cable (field supply)
d Cable sleeves (factory-mounted)
3 Inside the switch box, connect the wires to the appropriate
terminals, and fix the cables with cable ties. See:
models" [ 4 10]
▪ "5.3.1 In case of V3
models" [ 4 12]
▪ "5.3.2 In case of W1
5.3.1 In case of V3 models
1 Power supply cable:
EN/IEC 61000‑3‑12 (European/
Tightening torque (N•m)
1.2~1.5
"3.3 To open the outdoor
d
b1
c1
a1
EPRA14~18DAV3+W1
Daikin Altherma 3 H HT
4P586100-1C – 2020.01