Overview Of The Indoor Unit; Opening The Indoor Unit - Daikin EKHBHE008BA3V3 Installation Manual

Pump operation and space heating
When the room thermostat for the floor heating loop (T1) and the fan
coil units (T2) are connected to the indoor unit, the pump (4) will
operate when there is a request for heating from T1 and/or T2. The
outdoor unit will start operating to achieve the target leaving water
temperature. The target leaving water temperature depends on which
room thermostat is requesting heating.
Set point Field setting
Zone A First UI
Zone B Second [7-03]
Resulting water temperature
Result pump operation
When the room temperature of both zones is above the thermostat
set point, the outdoor unit and pump will stop operating.
NOTE Make sure to connect the thermostat wires to the
correct terminals (see
unit" on page
Make sure to configure the field settings [7-02],
[7-03] and [7-04] correctly. Refer to
control" on page
Make sure to configure the DIP switch SS2-3 on
the PCB of the EKHBH switch box correctly. Refer
to "Room thermostat installation configuration" on
page 21.
NOTE The request signals for space heating can be
implemented in two different ways (installer
choice).
- Thermo ON/OFF signal from room thermostat
- Status signal (active/not active) from the
mixing station
It is the installers responsibility to make sure no
unwanted situations can occur (e.g. too high
water temperatures towards floor heating loops,
etc.)
Daikin does not offer any type of mixing station.
Dual set point control only provides the possibility
to use two set points.
When only zone A request heating, zone B will be
fed with water at a temperature equal to the first
set point.
This can lead to unwanted heating of zone B.
When only zone B request heating, the mixing
station will be fed with water at a temperature
equal to the second set point.
Depending on the control of the mixing station,
the floor heating loop can still receive water at a
temperature equal to set point of the mixing
station.
Be aware that the actual water temperature through the
floor heating loops depends on the control and setting of
the mixing station.
EKHBH/XE008BA
Indoor unit for air to water heat pump system
4PW56301-1A
Thermo status
ON OFF ON
OFF ON ON
UI [7-03] [7-03]
ON ON ON
"Overview of the indoor
9).
"Dual set point
26.
O
VERVIEW OF THE INDOOR UNIT

Opening the indoor unit

The front flap on the indoor unit cover gives access to the
manometer and user interface.
The indoor unit cover can be removed by removing the 2 bottom
screws and unhitching the cover.
OFF
OFF
—
OFF
Make sure to fix the cover with the screws when installing
the cover (screws are delivered as accessory).
Parts inside the unit can be hot.
To gain access to the switch box components – e.g. to connect
the field wiring – the switch box service panel can be removed.
Thereto, loosen the front screws and unhitch the switch box
service panel.
WARNING
Switch off all power supply – i.e. outdoor unit power
supply and backup heater and domestic hot water
tank power supply (if applicable) – before removing
the switch box service panel.
Do not touch the refrigerant pipes during and
immediately after operation as the refrigerant pipes
may be hot or cold, depending on the condition of the
refrigerant flowing through the refrigerant piping,
compressor, and other refrigerant cycle parts. Your
hands may suffer burns or frostbite if you touch the
refrigerant pipes. To avoid injury, give the pipes time to
return to normal temperature or, if you must touch
them, be sure to wear proper gloves.
Do not touch the internal parts (pump, backup heater,
etc.) during and immediately after operation.
Your hands may suffer burns if you touch the internal
parts. To avoid injury, give the internal parts time to
return to normal temperature or, if you must touch
them, be sure to wear proper gloves.
Installation manual
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