RKHBH/X008AA
Indoor unit for air to water heat pump system
4PW50203-1A
Installation manual
19
[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 water to a specific temperature.
■
[2-00] Operation interval: day(s) of the week at which the
domestic 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 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
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).
Space heating off temperature
■
[4-02] Space heating off temperature: outdoor temperature
above which space heating is turned off, to avoid
overheating.
■
[4-03] Booster heater operation: defines whether the optional
booster heater operation is enabled (1) or limited (0).
The disinfection function field settings must be configured
by the installer according to national and local regulations.
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
NOTE
It is therefore recommended to leave the auto restart
function enabled.
NOTE
If the benefit kWh rate power supply is of the type that
power supply is interrupted, then always allow the auto
restart function.
00.00
22.00
24.00
01.00
23.00
t
T
DHW
T
H
T
U
[2-02]
[2-03]
[2-04]
NOTE
Even in case the backup heater operation
status field setting [4-00] is set to disabled (0),
the backup heater can operate during start-up
and defrost operation.
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 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.
NOTE
If the booster heater operation is limited, then
the booster heater operation is only allowed
during the disinfection function [2] (refer to
"[2] Disinfection function" on page 19) or when
powerful domestic hot water temperature is
initiated (refer to the operation manual).
1D_IM_4PW50203-1A.book Page 19 Thursday, January 29, 2009 10:51 AM
