Daikin Altherma EAVX-D9WG, Installer'S Reference Manual

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7 Installation
Installer reference guide
34
EPGA11~ EAVH/9W
Daikin Altherma – Low temperature split
4P556070-1 – 2019.02
Part Description
a An automatic air intake should be installed at the
highest point.
a
a Automatic air intake (for air supply) (for example an
automatic air purge)
b The freeze protection valves must be installed:
▪ vertically to allow water to flow out properly and free
from obstructions.
▪ at all lowest points of the field piping.
▪ in the coldest part and away from heat sources.
Note: Leave at least 15 cm clearance from the ground
to prevent ice from blocking the water exit.
b
b Freeze protection valve (Optional – field supply)
c 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.
▪ When there is a power interruption: The normally
closed valves close and isolate the water inside the
house. If the freeze protection valves open, only the
water outside the house is drained.
▪ In other circumstances (example: when there is a
pump failure): The normally closed valves remain
open. If the freeze protection valves open, the water
from inside the house is also drained.
c
c Normally closed valves (Recommended – Field
supply).
NOTICE
When freeze protection valves are installed, do NOT select
a minimum cooling setpoint lower than 8°C (8°C=default).
If lower, freeze protection valves can open during cooling
operation.
Heater tape (field supply)
1 Install heater tape to the outdoor field piping.
2 Provide external power supply for the heater tape.
NOTICE
▪ For the internal heater tape to operate, the power to the
unit MUST be ON. For this reason, during cold periods,
never disconnect the power, nor turn off the main
switch.
▪ In case of a power failure, power to the heater tape
(both internal and external) will be aborted and the
water circuit will NOT be protected. To guarantee a full
protection, it is always possible to add glycol to the
water circuit or to use freeze protection valves, even
when installing heater tape to the outdoor field piping.
7.5.7 To fill the domestic hot water tank
1 Open every hot water tap in turn to purge air from the system
pipe work.
2 Open the cold water supply valve.
3 Close all water taps after all air is purged.
4 Check for water leaks.
7.5.8 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
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) Minimum insulation thickness
(mm)
<20 19
20~30 32
30~40 40
40~50 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 be reached via https://
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.
7.6 Connecting the electrical wiring
7.6.1 About connecting the electrical wiring
Before connecting the electrical wiring
Make sure the water piping is connected.
Typical workflow
Connecting the electrical wiring typically consists of the following
stages:
1 Making sure the power supply system complies with the
electrical specifications of the heat pump.
2 Connecting the electrical wiring to the outdoor unit.
3 Connecting the electrical wiring to the indoor unit.
4 Connecting the main power supply.
5 Connecting the backup heater power supply.
6 Connecting the shut-off valves.
7 Connecting the electrical meters.
8 Connecting the domestic hot water pump.
9 Connecting the alarm output.
10 Connecting the space cooling/heating ON/OFF output.
11 Connecting the changeover to an external heat source.
12 Connecting the power consumption digital inputs.
13 Connecting the safety thermostat.
7.6.2 About electrical compliance
Equipment complying with EN/IEC 61000‑3‑12 (European/
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.).