Installation Of The Ekhbdp Drain Pan Kit (Only For Ekhbx Models); Refrigerant Pipework; Water Pipework - Daikin EKHBHE008BA3V3 Installation Manual

Installation of the EKHBDP drain pan kit (only for
EKHBX models)
For heating/cooling models, it is necessary to install the drain pan kit
(see "Accessories" on page 3).
During cooling operation, water vapour (humidity) in the air might
condense to liquid and collect on the cold refrigerant and water pipes.
This water is collected in the drain pan, which must be connected to a
drain.
For installation instructions, refer to the instruction sheet delivered
with the drain pan kit.
CAUTION
Make sure to position the pressure relief valve hose end in
the drain pan. Failure to do so might lead to water coming
into contact with electrical parts, resulting in electrical
shocks or short-circuit of the electrical system.

Refrigerant pipework

For all guidelines, instructions and specifications regarding
refrigerant pipework between the indoor unit and the outdoor unit,
please refer to the outdoor unit installation manual.
The location of the gas pipe and liquid pipe on the indoor unit is
shown under "Main components" on page
Refrigerant piping
specifications
Gas pipe connection
Liquid pipe connection
When connecting the refrigerant pipes, always use two
wrenches/spanners for tightening or loosening nuts!
Failure to do so can result in damaged piping connections
and leaks.
Installation manual
14
10.
Indoor unit Outdoor unit
15.9 mm (5/8 inch) 15.9 mm (5/8 inch)
6.4 mm (1/4 inch) 6.4 mm (1/4 inch)

Water pipework

Checking the water circuit
The units are equipped with a water inlet and water outlet for
connection to a water circuit. This circuit must be provided by a
licensed technician and must comply with all relevant European and
national regulations.
NOTE The unit is only to be used in a closed water system.
Application in an open water circuit can lead to
excessive corrosion of the water piping.
NOTE Before continuing the installation of the unit, check the
following points:
The maximum water pressure = 3 bar + static
pressure of pump.
The maximum water temperature is 65°C (safety
device setting).
Two shut-off valves are delivered with the unit. To
facilitate service and maintenance, install one at
the water inlet and one at the water outlet of the
indoor unit. Mind position of the shut-off valves.
Orientation of the integrated drain and fill valves is
important for servicing. See
Drain taps must be provided at all low points of
the system to permit complete drainage of the
circuit during maintenance.
Two drain valves integrated in the shut-off valves
are provided to drain the water from the indoor
unit water system.
Make sure to provide a proper drain for the
pressure relief valve to avoid any water coming
into contact with electrical parts.
Air vents must be provided at all high points of the
system. The vents should be located at points
which are easily accessible for servicing. An
automatic air purge is provided inside the indoor
unit. Check that this air purge valve is not tightened
too much so that automatic release of air in the wa-
ter circuit remains possible.
Take care that the components installed in the
field piping can withstand the water pressure and
water temperature.
Always use materials which are compatible with
water used in the system and with the materials
used on the indoor unit.
Select piping diameter in relation to required
water flow and available ESP of the pump.
The minimum required water flow for the indoor
unit operation is 12 l/min. When the water flow is
lower than this minimum value, flow error 7H will
be displayed and the operation of the indoor unit
will be stopped.
figure 3.
EKHBH/XE008BA
Indoor unit for air to water heat pump system
4PW56301-1A