6 Installation
Installer reference guide
16
07C2V3
Daikin Altherma monobloc compact outdoor unit
4P598847-1 – 2019.10
NOTICE
Install a manometer in the system.
NOTICE
Install air purge valves at all local high points.
6.4.4
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.
To prevent the freezing of the outdoor water piping during winter
time, the thickness of the sealing material MUST be at least 13 mm
(with λ=0.039 W/mK).
If the temperature is higher than 30°C and the humidity is higher
than RH 80%, the thickness of the insulation materials should be at
least 20 mm to prevent condensation on the surface of the
insulation.
During winter, protect the water piping and shut‑off valves against
freezing by adding heat tape (field supply). If the outdoor
temperature can drop below –20°C and no heat tape is used, it is
recommended to install the shut‑off valves indoors.
6.5
Connecting the electrical wiring
6.5.1
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 units.
2
Connecting the interconnection cable between outdoor unit and
domestic hot water tank.
3
Connecting the main power supply of the outdoor unit.
4
Connecting the power supply of the domestic hot water tank.
5
Connecting the power supply of the optional backup heater
(inside the domestic hot water tank; if applicable).
6
Connecting the remote outdoor sensor (if applicable).
7
Connecting the shut-off valve (if applicable).
INFORMATION
For instructions regarding the domestic hot water tank, see
the installation manual of the tank.
6.5.2
Precautions when connecting the
electrical wiring
INFORMATION
Also read the precautions and requirements in the
following chapters:
▪ General safety precautions
▪ Preparation
DANGER: RISK OF ELECTROCUTION
WARNING
ALWAYS use multicore cable for power supply cables.
6.5.3
Guidelines when connecting the electrical
wiring
Keep the following in mind:
▪ If stranded conductor wires are used, install a round crimp-style
terminal on the end of the wire. Place the round crimp-style
terminal on the wire up to the covered part and fasten the terminal
with the appropriate tool.
b
a
a
Stranded conductor wire
b
Round crimp-style terminal
▪ Use the following methods for installing wires:
Wire type
Installation method
Single-core wire
c b
c
a
a
A
AA´
A´
a
Curled single-core wire
b
Screw
c
Flat washer
Stranded conductor
wire with round
crimp-style terminal
c b
b
a
c
a
B
B
a
Terminal
b
Screw
c
Flat washer
O
Allowed
X
NOT allowed
Item
Tightening torque (N•m)
X3M
0.8~0.9
X4M
2.2~2.7
X5M
0.8~0.9
X7M
6.5.4
To connect the electrical wiring on the
outdoor unit
1
Remove the switch box cover. See
2
Strip insulation (20 mm) from the wires.
a
b
a
Strip wire end to this point
b
Excessive strip length may cause electrical shock or
leakage.
3
Insert the wiring at the back of the unit:
