Preparing Water Piping; To Check The Water Volume And Flow Rate; Preparing Electrical Wiring; Overview Of Electrical Connections For External And Internal Actuators - Daikin EHVZ08S18DA6V7 Installation Manual

3.2

Preparing water piping

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.
▪ Valve towards expansion vessel. The valve towards the
expansion vessel (if equipped) MUST be open.
3.2.1

To check the water volume and flow rate

Minimum water volume
There are no requirements for the minimum water volume.
NOTICE
When circulation in each space heating/cooling loop is
controlled by remotely controlled valves, it is important that
the minimum water volume is guaranteed, even if all of the
valves are closed.
Minimum flow rate
Check that the minimum flow rate in the installation is guaranteed in
all conditions on each zone separately. This minimum flow rate is
required during defrost/backup heater operation. For this purpose,
use the overpressure bypass valve delivered with the unit.
NOTICE
When circulation in each or certain space heating loops is
controlled by remotely controlled valves, it is important that
the minimum flow rate is guaranteed, even if all valves are
closed. In case the minimum flow rate cannot be reached,
a flow error 7H will be generated (no heating or operation).
See the installer reference guide for more information.
Minimum required flow rate
12 l/min
See the recommended procedure as described in
commissioning" [ 4 24].
during
3.3

Preparing electrical wiring

3.3.1 Overview of electrical connections for
external and internal actuators
Item Description
Outdoor unit and indoor unit power supply
1 Power supply for
outdoor unit
2 Power supply and
interconnection cable to
indoor unit
3 Power supply for
backup heater
4 Preferential kWh rate
power supply (voltage
free contact)
5 Normal kWh rate power
supply
Optional equipment
6 User interface used as
room thermostat
7 Room thermostat
EHVZ04+08S18+23DA6V+9W7
Daikin Altherma 3 R F
4P618950-1 – 2020.03
"6.2 Checklist
Wires Maximum
running
current
(a)
2+GND
(f)
3
See table below. —
(d)
2
2 6.3 A
(e)
2
(b)
3 or 4 100 mA
Item Description
8 Outdoor ambient
temperature sensor
9 Indoor ambient
temperature sensor
10 Heat pump convector
Field supplied components
11 Shut-off valve
12 Electricity meter
13 Domestic hot water
pump
14 Alarm output
15 Changeover to external
heat source control
16 Space heating
operation control
17 Power consumption
digital inputs
18 Safety thermostat for
the main zone
19 Safety thermostat for
the additional zone
(a) Refer to name plate on outdoor unit.
(b) Minimum cable section 0.75 mm².
(c) Cable section 2.5 mm².
(d) Cable section 0.75 mm² till 1.25 mm²; maximum length:
50 m. Voltage-free contact shall ensure the minimum
applicable load of 15 V DC, 10 mA.
(e) Cable section 0.75 mm² till 1.25 mm²; maximum length:
500 m.
(f) Cable section 1.5 mm².
NOTICE
More technical specifications of the different connections
are indicated on the inside of the indoor unit.
NOTICE
A safety thermostat (normal closed contact) MUST be
installed for the main zone. See
safety thermostat (normally closed
Backup heater Power supply
type
*6V 1N~ 230 V (6V)
3~ 230 V (6T1)
*9W 3N~ 400 V
4

Installation

4.1

Opening the units

4.1.1

To open the indoor unit

Overview
a
c
e
b
d
a Top panel
b User interface panel
4 Installation
Wires Maximum
running
current
(b)
2
(b)
2
(b)
2 100 mA
(b)
2 100 mA
(b)
2 (per meter)
(b)
2
(b)
2
(b)
2
(b)
2
(b)
2 (per input
signal)
(b)
2
(d)
2
"4.5.12 To connect the
contact)" [ 4 15].
Required number of
conductors
2+GND
3+GND
4+GND
Installation manual
7