NOTE
NOTE
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DHW
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D H W
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NOTE
NOTE
[2] Disinfection function
[4] Backup heater operation and space heating off temperature
Applies only to installations with a domestic hot water tank.
Backup heater operation
The disinfection function disinfects the domestic hot water tank by
The operation of the backup heater can be enabled or disabled, or it
periodically heating the domestic water to a specific temperature.
can be disabled depending on operation of the booster heater.
CAUTION
■
[4-
00] Status: defines whether backup heater operation is
enabled (1) or disabled (0).
The disinfection function field settings must be configured
by the installer according to local laws and regulations.
Even in case the backup heater operation
■
[2-00] Operation interval: day(s) of the week at which the
domestic water should be heated.
status field setting [4-00] is set to disabled (0),
the backup heater can operate during start-up
and defrost operation.
■
[2-
01] Status: defines whether the disinfection function is
turned on (1) or off (0).
■
[4-
01] Priority: defines whether backup heater and booster
■
[2-02] Start time: time of the day at which the domestic water
should be heated.
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
■
[2-03] Set point: high water temperature to be reached.
over the booster heater operation (2).
■
[2-
04] Interval: time period defining how long the set point
temperature should be maintained.
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
[2-03]
[2-04]
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
00.00
01.00
22.00
23.00
24.00
available for domestic water heating. However
domestic water heating by heat pump will still
[2-02]
be available.
Domestic hot water temperature
User set point temperature (as set on the user interface)
When the priority field setting is set to OFF (0),
make sure that electrical power consumption
does not exceed supply limits.
High set point temperature [2-03]
Time
Space heating off temperature
■
[4-02] Space heating off temperature: outdoor temperature
WARNING
above which space heating is turned off, to avoid
Be aware that the domestic hot water temperature at the
overheating.
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 laws and 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.
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).
If the benefit kWh rate power supply is of the type that
power supply is interrupted, then always allow the auto
restart function.
EDLQ036~054B EBLQ036~054BA6VJU1
Installation manual
Unit for air to water heat pump system
4PW56182-1
27
