EKHBH/ EKSWW150-300V3/Z2
Indoor unit for air to water heat pump and sanitary warm water tank for air to water heat pump system
4PW36978-1C
Installation manual
20
■
[1-02] Set point at low ambient temperature (Lo_Ti): the
target outgoing water temperature when the outdoor
temperature equals or drops below the low ambient
temperature (Lo_A).
Note that the Lo_Ti value should be higher than Hi_Ti, as for
colder outdoor temperatures (i.e. Lo_A) warmer water is
required.
■
[1-03] Set point at high ambient temperature (Hi_Ti): the
target outgoing water temperature when the outdoor
temperature equals or rises above the high ambient
temperature (Hi_A).
Note that the Hi_Ti value should be lower than Lo_Ti, as for
warmer outdoor temperatures (i.e. Hi_A) less warm water
suffices.
[2] Disinfection function
Applies only to installations with a sanitary water tank.
The disinfection function disinfects the sanitary water tank by
periodically heating the sanitary water to a specific temperature.
■
[2-00] Operation interval: day(s) of the week at which the
sanitary 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 sanitary 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.
[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 heater operation and space heating off temperature
Backup heater operation
—
Applies only to units with optional
backup heater 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).
Space heating off temperature
■
[4-02] Space heating off temperature: outdoor temperature
above which space heating is turned off, to avoid
overheating.
[5] Equilibrium temperature and space heating priority
temperature
Equilibrium temperature — The 'equilibrium temperature' field
settings apply to operation of the optional backup heater. When the
equilibrium temperature function is enabled, operation of the backup
heater is restricted to low outdoor temperatures, i.e. when the
outdoor temperature equals or drops below the specified equilibrium
temperature. When the function is disabled, operation of the backup
heater is possible at all outdoor temperatures. Enabling this function
reduces the working time of the backup heater.
■
[5-00] Equilibrium temperature status: specifies whether the
equilibrium temperature function is enabled (1) or
disabled (0).
■
[5-01] Equilibrium temperature: outdoor temperature below
which operation of the backup heater is allowed.
Space heating priority temperature (applies only to installations
with a sanitary water tank) — The 'space heating priority
temperature' field settings apply to operation of the 3-way valve and
the booster heater in the sanitary water tank.
When the space heating priority function is enabled, it is assured that
the full capacity of the heat pump is used for space heating only
when the outdoor temperature equals or drops below the specified
space heating priority temperature, i.e. low outdoor temperature. In
this case the sanitary water will only be heated by the booster heater.
■
[5-02] Space heating priority status: specifies whether space
heating priority is enabled (1) or disabled (0).
T
t
Target water temperature
T
A
Ambient (outdoor) temperature
= Shift value
The disinfection function field settings must be configured
by the installer according to national and local regulations.
T
SWW
Sanitary water temperature
T
U
User set point temperature (as set on the user interface)
T
H
High set point temperature [2-03]
t
Time
Lo_Ti
Lo_A
Hi_A
T
A
T
t
+ 05
00
– 05
Hi_Ti
Shift value
00.00
22.00
24.00
01.00
23.00
t
T
SWW
T
H
T
U
[2-02]
[2-03]
[2-04]
NOTE
It is therefore recommended to leave the auto restart
function enabled.
NOTE
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 sanitary 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 OFF (0),
make sure that electrical power consumption
does not exceed supply limits.