Installation manual
25
RKHBRD011~Y1
Indoor unit for air to water heat pump system
4PW61218-1C – 2012.06
[b] Domestic hot water set points
The reheat mode will prevent the domestic hot water from cooling
down lower than a certain temperature. When enabled the indoor unit
will deliver hot water to the domestic hot water tank if the reheat
minimum value is reached. The domestic water heating will continue
until the reheat maximum temperature is reached. In this way always
a minimum of domestic hot water is available.
■
[b-00]
Set point: reheat minimum temperature (see figure
below).
■
[b-01]
Set point: reheat maximum temperature (see figure
below).
■
[b-02]
Status: defines whether the weather dependent domestic
water heating is turned ON (1) or OFF (0).
If enabled, the storage set point will be set weather dependent.
In case of a higher ambient temperature (e.g. during summer-
time), the cold supply water to the mixing tap (e.g. shower, bath)
will also have a higher temperature. This makes that the
temperature of the hot water from the domestic hot water tank
may be lower to reach the same water mixing temperature from
the shower or bath mixing tap. In this way, with a lower domestic
hot water tank temperature setting the comfort level can be kept
the same but with a lower energy consumption.
■
[b-03]
Set point: storage temperature (see figure above) only
valid when [b-02]=0.
■
[b-04]
Automatic maximum domestic hot water storage
temperature: default = 70°C.
[C] Leaving water temperature limits
To prevent misuse concerning leaving water temperatures, it is
possible to limit the set points.
■
[C-00]
Set point: leaving water maximum temperature
■
[C-01]
Set point: leaving water minimum temperature
[d] Domestic water heating retention times
The heat pump can only work in either space heating operation or
domestic water heating operation. No simultaneous operation is
possible, except when using multiple set point control (see chapter
"Multiple set point control" on page 29 for more information).
■
[d-00]
Set point: minimum operation time for domestic water
heating
■
[d-01]
Set point: maximum operation time for domestic water
heating
■
[d-02]
Set point: interval minimum stop time of domestic water
heating
Changing the timer values can have an impact on space heating and
domestic water heating heat up timers. The default values are
proposed but can be changed depending on the complete system
installation.
For a detailed explanation about simultaneous request of space
heating and domestic water heating, see chapter "Simultaneous
demand of space heating and domestic water heating" on page 26.
[E] Service mode
■
[E-00]
Vacuum, recovery, charging mode
When recovering/vacuuming of the indoor unit is needed, field
setting [E-00] must be activated. It will force the unit into thermo
OFF and will open the expansion valve of the indoor unit R134a
circuit so full vacuuming is possible.
By default [E-00]=0, set to 1 to enable the vacuum mode.
■
[E-04]
Pump only operation
When commissioning and installing the unit it is very important
to get all air out of the water circuit.
Through this field setting the pump can be operated without
actual operation of the unit. By doing so this will enhance the air
removal from the circuit. The pump can operate at different
speed:
■
[E-04]=0 normal operation of the unit (default)
■
[E-04]=1 low pump speed operation
A
Storage operation (if activated)
B
Reheat operation (if activated)
(a)
(a) Reheat operation is activated when the
button is pressed and when the
icon is displayed.
C
Disinfection operation (if activated)
Field settings
D
Disinfection operation temperature [5-00] (e.g. 70°C)
E
Hot water storage temperature [b-03] (e.g. 60°C)
F
Reheat maximum water temperature [b-01] (e.g. 45°C)
(a)
G
Reheat minimum water temperature [b-00] (e.g. 35°C)
(a)
t
Time
T
Domestic hot water tank temperature
A
Ambient temperature
T
Domestic hot water storage temperature
NOTE
The ambient temperatures for weather dependent
domestic water heating (see figure) are fixed and can
not be changed.
A
B
C
D
E
F
G
T
t
T
A
[b-04]
55
°
C
15
°
C
25
°
C
NOTE
If weather dependent domestic water heating is
enabled [b-02], the storage temperature will be
set automatically and the field setting [b-03] will
be of no importance.
NOTE
■
Do not forget to restore the field setting
[E-00] to the default value when vacuuming
is finished!
■
When [E-00] is set to 1 (recovery mode),
[E-04] can be set to 2 to enhance recovery of
the refrigerant.
