6 720 801 244 (2013/08)
Compress 3000 DW FO
Installation instructions | 23
4.10 What to expect for “normal startup”
After the unit has been installed, with all electrical and water
connections secure and checked, the unit should be filled with
water (vent tank by opening a hot water faucet somewhere in
home to allow tank to fully fill with water). Once tank is full and
power is energized, the user must press the POWER button on
the user interface.
4.11 Off-peak compatibility
The appliance is technically compatible to be connected to a fix
line for off-peak tariff. However, the off-peak must be wisely
used.
Off-peak periods off less than 16 hours might not ensure the re-
heating, depending on the hot water demand and on the
temperature of the air and inlet water. Ensure that your off-
peak periods are suitable for your needs.
The weekly LEG mode requires additionally 6 to 7 hours.
Therefore once a week this additional period must be ensured
to complete the thermal disinfection. It is recommended to
programme the LEG to be done when extended off-peak
periods are available, typically weekends.
To optimize the comfort and maximize the savings, it is
recommended the use of a power commutator between the
normal line and the off peak line together with a programmed
working period (
section 5.6.2). The best strategy will
depend up on the hot water needs and ambient conditions.
In case time of use tariffs are available, it is recommended to
use the programmed working periods (
section 5.6.2) to
take full advantage of them.
In case of a temporary suspension on the water supply during a
off-peak period the appliance may get unpurged and stop
working during its restart. An error message will be displayed
and the appliance will remain blocked. To minimize the
possible inconveniences from a suppression on the water
supply service, always check the appliance after such incident
occurred.
Elapsed time
HPWH actions
Comments
0 to 5 minutes
Unit is silent.
Water pump runs during the first minute.
This 7 minutes off-time prevents compressor
damage
5 to 7 minutes
Fans turn on
7 minutes and beyond
Compressor turns on
Uses efficient heat pump for majority of heating
Table 4
If the ambient temperature is outside of the
range 3 °C-40 °C, the pump will not be able to
run by using the heat pump mode. The
electric element will be used if COMBI mode
is selected (default mode) and until the
ambient air temperature returns to the
operating range. If HEAT PUMP mode is
selected the electric element will not be used
outside the nominal operating range to heat
up the water.
NOTICE:
Damage to the appliance!
Never use the off-peak in case the appliance
is set to OFF mode and temperatures around
0 °C or below are expected: the anti-freeze
mechanism will not be ensure!
