Daikin EBHQ006BAV3 Installation Manual page 34

[2] Disinfection function
Applies only to installations with a domestic hot water tank.
The disinfection function disinfects the domestic hot water tank by
periodically heating the domestic hot water to a specific temperature.
CAUTION
The disinfection function field settings must be configured
by the installer according to local and national regulations.
[2-00] Operation interval: day(s) of the week at which the
domestic hot water should be heated.
[2-01] Status: defines whether the disinfection function is
turned on (1) or off (0).
[2-02] Start time: time of the day at which the domestic hot
water should be heated.
[2-03] Set point: high water temperature to be reached.
[2-04] Interval: time period defining how long the set point
temperature should be maintained.
T
DHW
[2-03]
T
H
T
U
00.00 01.00
T Domestic hot water temperature
DHW
T User set point temperature (as set on the user interface)
U
T High set point temperature [2-03]
H
t Time
WARNING
Be aware that the domestic hot water temperature at the
hot water tap will be equal to the value selected in field
setting [2-03] after a disinfection operation.
If this high domestic hot water temperature can be a
potential risk for human injuries, a mixing valve (field
supply) shall be installed at the hot water outlet connection
of the domestic hot water tank. This mixing valve shall
secure that the hot water temperature at the hot water tap
never rise above a set maximum value. This maximum
allowable hot water temperature shall be selected
according to local and national regulations.
[3] Auto restart
When power returns after a power supply failure, the auto restart
function reapplies the user interface settings at the time of the power
supply failure.
NOTICE
It is therefore recommended to leave the auto restart
function enabled.
Note that with the function disabled the schedule timer will not be
activated when power returns to the unit after a power supply failure.
Press the pr button to enable the schedule timer again.
[3-00] Status: defines whether the auto restart function is
turned ON (0) or OFF (1).
NOTICE
If the benefit kWh rate power supply is of the type that
power supply is interrupted, then always allow the auto
restart function.
Installation manual
32
[2-04]
22.00 23.00 24.00 t
[2-02]
[4] Backup/booster heater operation and space heating off
temperature
Backup heater operation
The operation of the backup heater (EKMBUH unit) can altogether be
enabled or disabled, or it can be disabled depending on operation of
the booster heater.
[4-00] Status: defines whether backup heater operation is
enabled (1) or disabled (0).
NOTICE
Even in case the backup heater operation status field
setting [4-00] is disabled (0), the backup heater can
operate during start-up and defrost operation.
[4-01] Priority: defines whether backup heater and booster
heater can operate simultaneously (0), or if the booster
heater operation has priority over the backup heater
operation (1), or if the backup heater operation has priority
over the booster heater operation (2).
NOTICE
When the priority field setting is set to ON (1),
space heating performance of the system might
be decreased at low outdoor temperatures, since
in case of domestic water heating demand the
backup heater will not be available for space
heating (space heating will still be provided by the
heat pump).
When the priority field setting is set to ON (2),
domestic water heating performance of the system
might be decreased at low outdoor temperatures,
since in case of space heating demand the
booster heater will not be available for domestic
water heating. However domestic water heating by
heat pump will still be available.
When the priority field setting is set to OFF (0),
make sure that electrical power consumption does
not exceed supply limits.
Space heating off temperature
[4-02] Space heating off temperature: outdoor temperature
above which space heating is turned off, to avoid
overheating.
Booster heater operation
Applies only to installations with a domestic hot water tank.
The operation of the booster heater can be enabled or limited
depending on outdoor temperature (T
temperature (T ) or operation mode of the heat pump.
DHW
[4-03] Booster heater operation: defines whether the optional
booster heater operation is enabled (1) or has certain
limitations (0/2/3).
Explanation of settings of [4-03]
Booster heater will/can only operate if domestic hot water mode
is activated (w).
[4-03]=0, then booster heater operation is only allowed
during "[2] Disinfection function" and "Powerful domestic
water heating" (see operation manual).
This setting is only recommended in case the capacity of the
heat pump can cover the heating requirements of the house
and domestic hot water over the complete heating season.
The result of this setting is that the domestic hot water will
never be heated by the booster heater except for
"[2] Disinfection function" and "Powerful domestic water
heating" (see operation manual).
), domestic hot water
A
EBHQ006+008BAV3 + EKCBX/H008BAV3
Unit for air to water heat pump system
4PW64602-1A – 09.2010