To Fill The Domestic Hot Water Tank; To Insulate The Water Piping; Connecting The Electrical Wiring; About Connecting The Electrical Wiring - Daikin Altherma EHVH08SU18CB6W Installer's Reference Manual

7 Installation
7.8.7

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.
5 Manually operate the pressure relief valve of the domestic hot
water tank to ensure a free water flow through the discharge
pipe.
NOTICE
To operate the system, the domestic hot water tank needs
to be filled completely. Turning on the system when the
tank is not full can damage the integrated booster heater
and cause electrical errors.
7.8.8

To insulate the water piping

The piping in the complete water circuit MUST be insulated to
prevent condensation and reduction of the heating capacity.
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.
7.9

Connecting the electrical wiring

7.9.1

About connecting the electrical wiring

Before connecting the electrical wiring
Make sure:
▪ The refrigerant piping is connected and checked
▪ 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 user interface.
7 Connecting the shut–off valves.
8 Connecting the electrical meters.
9 Connecting the domestic hot water pump.
10 Connecting the alarm output.
11 Connecting the space heating ON/OFF output.
12 Connecting the changeover to an external heat source.
13 Connecting the power consumption digital inputs.
14 Connecting the safety thermostat.
15 Connecting the booster heater power supply.
7.9.2

About electrical compliance

Only for indoor units
See "7.9.8 To connect the backup heater power supply" on
page 44.
Installer reference guide
42
7.9.3 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.
7.9.4 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
Single-core wire
A
a Curled single-core wire
b Screw
c Flat washer
c b
Stranded conductor
wire with round
crimp-style terminal
a Terminal
b Screw
c Flat washer
O Allowed
X NOT allowed
Tightening torques
Item
M4 (X1M)
M4 (earth)
7.9.5 To connect the electrical wiring on the
outdoor unit
1 Remove the 2 switch box cover screws.
2 Remove the switch box cover.
ERLQ004~008CA + EHVH04+08SU18+26CB6W
Installation method
c b
AA´
A´
c
a a
a b c
B
B
a
Tightening torque (N•m)
1.2~1.5
Daikin Altherma – Low temperature split
4P449978-1B – 2018.07