Installation manual
7
EKHBH/X008BB
Indoor unit for air to water heat pump system
4PW62570-1A – 01.2011
The ON/OFF setting of the heating/cooling operation is done by the
room thermostat and cannot be done by the user interface on the
indoor unit.
Domestic water heating
(1)
Domestic water heating is as described under
Application 4
Space heating and cooling application
without the room thermostat
connected to the indoor unit
, but with the heating only room
thermostat (set heating only) controlling the floor heating
and the
heating/cooling thermostat (set heating/cooling) controlling the fan
coil units. Heating is provided through floor heating loops and fan coil
units. Cooling is provided through the fan coil units only.
1
Outdoor unit
2
Indoor unit
3
Heat exchanger
4
Backup heater
5
Pump
6
Shut-off valve
7
Motorised 2-way valve to shut off the floor heating loops
during cooling operation (field supply)
8
Motorised 2-way valve for activation of the room thermostat
(field supply)
9
Collector (field supply)
10
By-pass valve (field supply)
FCU1...3
Fan coil unit (optional)
FHL1...3
Floor heating loop
T
Heating only room thermostat (optional)
T4...6
Individual room thermostat for fan coil heated/cooled room
(optional)
Pump operation
With no thermostat connected to the indoor unit (
be configured to operate either as long as the indoor unit is on, or
until the required water temperature is reached.
Space heating and cooling
According to the season, the customer will select heating or cooling
through the user interface on the indoor unit.
The outdoor unit (
) will operate in heating mode or cooling mode to
achieve the target leaving water temperature.
With the unit in heating mode, the 2-way valve (
) is open. Hot water
is provided to both the fan coil units and the floor heating loops.
With the unit in cooling mode, the 2-way valve (
) is closed to prevent
cold water running through the floor heating loops (FHL).
The ON/OFF setting of the heating/cooling operation is done by the
user interface on the indoor unit.
Application 5
Space heating with an auxiliary boiler (alternating operation)
Space heating application by either the Daikin indoor unit or by an
auxiliary boiler connected in the system. The decision whether either
the EKHB* indoor unit or the boiler will operate can be achieved by
an auxiliary contact or an EKHB* indoor controlled contact.
The auxiliary contact can e.g. be an outdoor temperature thermostat,
an electricity tariff contact, a manually operated contact, etc. See
"Field wiring configuration A" on page 8
.
The EKHB* indoor unit controlled contact (also called 'permission
signal for the auxiliary boiler') is determined by the outdoor
temperature (thermistor located at the outdoor unit). See
Bivalent operation is only possible for space heating operation,
not
for the domestic water heating operation. Domestic hot water in such
an application is always provided by the domestic hot water tank
which is connected to the Daikin indoor unit.
The auxiliary boiler must be integrated in the piping work and in the
field wiring according to the illustrations below.
NOTICE
■
Make sure to connect the thermostat wires to the
correct terminals (see
) and to configure the DIP switch
toggle switches correctly (see
installation configuration" on page 24
■
Wiring of the 2-way valve (
) is different for a NC
(normal closed) valve and a NO (normal open) valve!
Make sure to connect to the correct terminal numbers
as detailed on the wiring diagram.
(1) When the unit is configured for restricted power supply condition mode,
see
T4
T5
T6
T
10
M
FCU1
FCU2
FCU3
9
FHL1
FHL2
FHL3
6
4
5
3
2
1
6
7
8
M
INFORMATION
Details on pump configuration can be found under
"8.3. Pump operation configuration" on page 24
NOTICE
■
When closing several loops in the system by remotely
controlled valves, it might be required to install a by-
pass valve (
) to avoid the flow switch safety device
from being activated. See also
■
Wiring of the 2-way valve (
) is different for a NC
(normal closed) valve and a NO (normal open) valve!
Make sure to connect to the correct terminal numbers
as detailed on the wiring diagram.
CAUTION
■
Be sure that the boiler and the integration of the boiler
in the system is in accordance with the applicable
legislation.
■
Daikin can not be put responsible for incorrect or
unsafe situations in the boiler system.
