EKHBH/X008BB
Indoor unit for air to water heat pump system
4PW62570-1A – 01.2011
Installation manual
28
[2] Disinfection function
(1)
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.
■
[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
Domestic hot water temperature
T
U
User set point temperature (as set on the user interface)
T
H
High set point temperature [2-03]
t
Time
[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.
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)
.
[4] Backup/booster heater operation and space heating off
temperature
(2)
Backup heater operation (only for EKHW* or applications
without tank installed)
The operation of the backup heater 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).
■
[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).
(1) When the unit is configured for restricted power supply condition mode,
see
CAUTION
The disinfection function field settings must be configured
by the installer according to the applicable legislation.
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.
When the 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 the applicable legislation.
CAUTION
Make sure that the disinfection function start time [2-02]
with defined duration [2-04] is not interrupted by possible
domestic hot water demand.
00.00
22.00
24.00
01.00
23.00
t
T
DHW
T
H
T
U
[2-02]
[2-03]
[2-04]
NOTICE
It is therefore recommended to leave the auto restart
function enabled.
NOTICE
If the benefit kWh rate power supply is of the type that
power supply is interrupted, then always allow the auto
restart function.
INFORMATION
Continuous indoor unit control can be guaranteed
independent of the benefit kWh rate power supply status,
by connecting the indoor unit to a normal kWh rate power
supply. See
"Connection to a benefit kWh rate power
(2) When the unit is configured for restricted power supply condition mode,
INFORMATION
Applicable for tank with built-in electrical booster heater
(EKHW*)
OR
when no optional domestic hot water tank connected to the
application (all information and limitation related to the
booster heater can be neglect).
INFORMATION
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.
