Daikin EKHBHE008BA3V3 Installation Manual page 4

P
H
T
D
1 Heat pump capacity
2 Required heating capacity (site dependent)
T
Design temperature
D
T
Ambient (outdoor) temperature
A
P
Heating capacity
H
At selection of the heat pump, the heat pump capacity
must match:
- the required space heating capacity of the lowest
expected outdoor ambient temperature.
AND
- the domestic hot water demand when installing the
optional domestic hot water tank.
The backup heater capacity and the optional booster
heater capacity are not supplementary to the heat
pump capacity. The total capacity of the system
equals the capacity of the heat pump and not the sum
of heat pump and backup heater capacity and the
optional booster heater capacity.
Emergency backup heater operation always has
priority over compressor or booster heater operation.
Emergency backup heater operation occurs because of:
User request to heat up water to the space heating
loops. The temperature of this water is too low and is
out of the operation range (during initial start-up for
example). Refer to
ambient temperatures" on page 22
low outdoor ambient temperatures" on page
During heating operation the water temperature
becomes too low and drops out of the operation
range. Refer to
expansion vessel pre-pressure" on page 15
minimize the backup heater operation.
Malfunction of the heat pump unit.
If during backup heater operation the heating load is higher
than the heater capacity, the water temperature can not
increase. In this case refer to
ambient temperatures" on page
Domestic hot water tank (option)
An optional EKHW* domestic hot water tank with integrated 3 kW
electrical booster heater can be connected to the indoor unit. The
domestic hot water tank is available in three sizes: 150, 200 and
300 litre. Refer to the domestic hot water tank installation manual for
further details.
Simultaneous operation of compressor, backup heater and
booster heater is NOT possible . Read attentively following
warnings to understand the unit operation.
Installation manual
2
1
2
T
A
"Initial start-up at low outdoor
and "Re-start at
22.
"Checking the water volume and
"Re-start at low outdoor
22.
Balance between space heating/cooling demand and
domestic hot water demand
Only if the unit is correctly sized then at some point
during space cooling/heating operation the unit will
reach the requested setpoint. When this occurs,
domestic water heating by compressor becomes
possible.
To ensure domestic hot water production, the
schedule timers must be used to disable space
heating/cooling. Refer to the operation manual on how
to program the schedule timers.
Booster heater operation is only possible when the
compressor of the heatpump is not operating. The
compressor
cooling/heating demand or because of domestic
water heating.
To ensure domestic hot water production, the
schedule timers must be used to disable space
heating/cooling. Refer to the operation manual on how
to program the schedule timers.
If using a room thermostat, domestic water heating by
compressor or by booster heater is NOT possible as
long as the room thermostat demands cooling or
heating.
In this case de-activate the room thermostat demand
by its schedule timer.
Refer to the manual of the room thermostat for a
detailed explanation how to de-activate space
cooling/heating by schedule timer, or refer to the
separate addendum for an example of the Daikin
room thermostat schedule timer programming.
Drain pan kit (option)
For heating/cooling versions (EKHBX), it is necessary to install the
EKHBDP drain pan kit.
For more information concerning the drain pan kit, refer to
"Installation of the EKHBDP drain pan kit (only for EKHBX models)"
on page 14.
Solar kit for domestic hot water tank (option)
For information concerning the EKSOLHW solar kit, refer to the
installation manual of that kit.
Digital I/O PCB kit (option)
An optional EKRP1HB digital I/O PCB can be connected to the
indoor unit and allows:
to
remote alarm output
heating/cooling ON/OFF output
bivalent operation (permission signal for the auxiliary boiler)
Refer to the operation manual of the indoor unit and to the installation
manual of the digital I/O PCB for more information.
Refer to the wiring diagram or connection diagram for connecting this
PCB to the unit.
Remote thermostat kit (option)
An optional room thermostat EKRTW, EKRTWA, or EKRTR can be
connected to the indoor unit. Refer to the installation manual of the
room thermostat for more information.
Possible options
EKHBH/XE008 AA
EKHBH/XE008 BA
operates because of
EKBPHT08 EKBPHT08BA
Possible Not allowed
Possible Possible
EKHBH/XE008BA
Indoor unit for air to water heat pump system
4PW56301-1A
space