Daikin Altherma 3 H HT W - Electrical Installation

5 Electrical installation
Installation manual
9
ETBH/X16DA6V+9W
Daikin Altherma 3 H HT W
4P586453-1B – 2020.01
Glycol setting
NOTICE
If glycol is present in the system, setting [E-0D] must be
set to 1. If the glycol setting is NOT set correctly, the liquid
inside the piping can freeze.
Freeze protection by freeze protection valves
About freeze protection valves
When no glycol is added to the water, you can use freeze protection
valves to drain the water from the system before it can freeze.
▪ Install freeze protection valves (field supply) at all lowest points of
the field piping.
▪ 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.
4.2.4 To fill the domestic hot water tank
See the installation manual of the domestic hot water tank.
4.2.5 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
See the installation manual of the outdoor unit, or the installer
reference guide.
5 Electrical installation
DANGER: RISK OF ELECTROCUTION
WARNING
ALWAYS use multicore cable for power supply cables.
INFORMATION
When installing field supply or option cables, foresee
sufficient cable length. This will make it possible to open
the switch box and gain access to other components
during service.
CAUTION
Do NOT push or place redundant cable length in the unit.
NOTICE
The distance between the high voltage and low voltage
cables should be at least 50mm.
5.1 About electrical compliance
Only for the backup heater of the indoor unit
See "5.3.2To connect the backup heater power supply"[412].
5.2 Guidelines when connecting the
electrical wiring
Tightening torques
Indoor unit:
Item Tightening torque (N•m)
M4 (X1M, X2M, X5M) 1.2~1.5
M4 (earth)
5.3 Connections to the indoor unit
Item Description
Power supply (main) See "5.3.1To connect the main power
supply"[411].
Power supply (backup
heater)
See "5.3.2To connect the backup heater
power supply"[412].
Shut-off valve See "5.3.3To connect the shut-off
valve"[413].
Electricity meters See "5.3.4To connect the electricity
meters"[414].
Domestic hot water
pump
See "5.3.5To connect the domestic hot
water pump"[414].
Alarm output See "5.3.6To connect the alarm
output"[414].
Space cooling/heating
operation control
See "5.3.7To connect the space cooling/
heating ON/OFF output"[415].
Changeover to
external heat source
control
See "5.3.8To connect the changeover to
external heat source"[415].
Power consumption
digital inputs
See "5.3.9To connect the power
consumption digital inputs"[416].
Safety thermostat See "5.3.10To connect the safety
thermostat (normally closed
contact)"[416].
Room thermostat
(wired or wireless)
See:
▪ Installation manual of the wireless
room thermostat
▪ Installation manual of the wired
room thermostat (digital or
analogue) + multi-zoning base
unit
▪ Connection of the wired room
thermostat (digital or analogue)
to the multi-zoning base unit
▪ Connection of the multi-zoning
base unit to the indoor unit
▪ For cooling/heating operation,
you also need option EKRELAY1
▪ Addendum book for optional
equipment
Wires: 0.75mm²
Maximum running current: 100mA
For the main zone:
▪ [2.9] Control
▪ [2.A] Thermostat type
For the additional zone:
▪ [3.A] Thermostat type
▪ [3.9] (read-only) Control