Go to MENU> FOR SERVICEMAN>DHW MODE
SETTING>1.1 DHW MODE
1 DHW MODE SETTING
dT5_ON
dT1S5
T4DHWMAX
T4DHWMIN
t_INTERVAL_DHW
SCROLL
Use
and
to scroll and adjust parameters. Use
BACK to exit.
dT5_ON is the temperature difference for starting the
heat pump, the picture below illustrates the dT5_ON
function.
T5
T5S
T5S-dT5_ON
OFF
ON
Compressor
T5S is the target temperature for domestic hot water. T5
is the actual temperature of domestic hot water. When
T5 drops to a certain temperature (T5<T5S-dT5_ON) the
heat pump will be available. dT1S5 is the correct value
for the target outlet water temperature (T1S=T5+dT1S5).
NOTE
The default value of dT1S5 is 10, if surface area
of coil in tank is not large enough, heat pump will
stop even water temperature in the tank is far
below the setpoint, it is suggested that set
dT1S5 to 20. If water temperature probe located
in the bottom of tank, it is possible that long time
is needed to turn on the heat pump, in this
condition please set dT1s5 to 20 and put the
temperature probe to the upper part of the tank.
T4DHWMAX is the maximum ambient temperature that
the heat pump can operate at for domestic water
heating. The unit will not operate if the ambient
temperature goes above it in DHW mode.
T4DHWMIN is the minimum ambient temperature that
the heat pump can operate for domestic water heating.
The heat pump will turn off if the ambient temperature
drops below it in water heating mode. The relationship
between operation of the unit and ambient temperature
can be illustrated in the picture below:
Heat by
Heat by
TBH or AHS
heat pump
T4DHWMIN
T_INTERVAL_DHW is the start time interval of the
compressor in DHW mode. When the compressor stops
running, the next time the compressor turns on it should
be T_INTERVAL_DHW plus one minute later at least.
5°C
10°C
43°C
-10°C
5 MIN
Use
BACK to exit.
dT5_TBH_OFF is the temperature difference between T5
and T5S that turns the booster heater off. The booster
heater will turn off (T5T5S+dT_TBH_OFF) when the
heat pump malfunctions.
T4_TBH_ON is the temperature only when the ambient
temperature is lower than its parameter and the booster
heater will be available. t_TBH_DELAY is the time that
the compressor has run before starting the booster heater
(if T5<min (T5S,T5stop)).
The operation of the unit during DHW mode described in
OFF
the picture below:
Time
min(T5S,T5
stop)-dT5_on
In the picture, T5stop is a parameter related to ambient
temperature, which cannot be changed in the user
interface. When T5T5stop, the heat pump will turn off.
T4
OFF
T4DHWMAX
146
If tank heater (booster heater) is avaliable, Go to FOR
SERVICEMAN >DHW MODE SETTING>1.2 TANK
HEATER and select "Yes", when "OK" pressed, the
following page will appear:
1.2 TANK HEATER
dT5_TBH_OFF
T4_TBH_ON
t_TBH_DELAY
SCROLL
and
to scroll and adjust parameters. Use
T5
T5S+dT5_
TBH_OFF
T5S
T5stop
ON
COMP.
OFF
ON
OFF
TBH
t_TBH_delay
NOTE
The booster heater and backup heater can't
operate simultaneously, if the booster heater has
been on, the backup heater will be off.
If the booster heater is unavailable (1.2 TANK
HEATER NON is selected), the dT5_ON cannot
be adjusted and is fixed at 4.
To enable disinfect function,Go to MENU> FOR
SERVICEMAN> DHW MODE SETTING>1.3 DISIN-
FECT and select "YES", when "OK" pressed, the
following page will appear.
1.3 DISINFECT
T5S_DI
t_DI_HIGHTMEP.
t_DI_MAX
SCROLL
5°C
20°C
30 MIN
OFF
Time
65°C
30 MIN
120 MIN