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NOTICE
A pressure relief valve (field supply) with an opening
pressure of maximum 10 bar (=1 MPa) must be installed
on the domestic cold water inlet connection in accordance
with the applicable legislation.
NOTICE
▪ A drain device and pressure relief device must be
installed on the cold water inlet connection of the
domestic hot water cylinder.
▪ To avoid back siphonage, it is recommended to install a
non-return valve on the water inlet of the domestic hot
water tank in accordance with the applicable legislation.
Make sure it is NOT between the pressure relief valve
and the DHW tank.
▪ It is recommended to install a pressure reducing valve
on the cold water inlet in accordance with the
applicable legislation.
▪ It is recommended to install an expansion vessel on the
cold water inlet in accordance with the applicable
legislation.
▪ It is recommended to install the pressure relief valve on
a higher position than the top of the domestic hot water
tank. Heating of the domestic hot water tank causes
water to expand and without pressure relief valve the
water pressure inside the tank can rise above the tank
design pressure. Also the field installation (piping,
tapping points, etc.) connected to the tank is subjected
to this high pressure. To prevent this, a pressure relief
valve needs to be installed. The overpressure
prevention depends on the correct operation of the field
installed pressure relief valve. If this is NOT working
correctly, overpressure will deform the tank and water
leakage may occur. To confirm good operation, regular
maintenance is required.
NOTICE
Differential pressure bypass valve (field supply). We
recommend to install a differential pressure bypass valve
in the space heating water circuit. Mind the minimum flow
rate when adjusting the differential pressure bypass valve
setting.
NOTICE
Install air purge valves at all local high points.
5.3.2
To connect the recirculation piping
Prerequisite: Only required if you need recirculation in your system.
1 Remove the top panel from the unit, see
unit" [ 4 5].
indoor
2 Cut out the rubber grommet on top of the unit, and remove the
stop. The recirculation connector is placed below the hole.
3 Route the recirculation piping through the grommet and connect
it to the recirculation connector.
EHFH03S18D
Daikin Altherma 3 R F
4P596803-1D – 2022.08
4 Reattach the top panel.
5.3.3
To fill the water circuit, use a field supply filling kit. Make sure you
comply with the applicable legislation.
5.3.4
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 field-installed pressure relief valve to
ensure a free water flow through the discharge pipe.
5.3.5
The piping in the complete water circuit MUST be insulated to
prevent condensation during cooling operation and reduction of the
heating and cooling 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.
6
"4.2.1 To open the
6.1
Only for the backup heater of the indoor unit
See
"6.3.2 To connect the backup heater power
6 Electrical installation
To fill the water circuit
INFORMATION
Make sure both air purge valves (one on the magnetic filter
and one on the backup heater) are open.
To fill the domestic hot water tank
To insulate the water piping
Electrical installation
INFORMATION
This unit is a heating only model. Therefore, all references
to cooling in this document are NOT applicable.
DANGER: RISK OF ELECTROCUTION
WARNING
ALWAYS use multicore cable for power supply cables.
CAUTION
Do NOT push or place redundant cable length into the unit.
NOTICE
The distance between the high voltage and low voltage
cables should be at least 50 mm.
WARNING
Make sure that the electrical wiring does NOT touch the
refrigerant gas pipe, which can be very hot.
a
a Refrigerant gas pipe
About electrical compliance
supply" [ 4 12].
Installation manual
9
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