What To Expect From A "Normal Startup; Off-Peak Compatibility; Demand Response - Bosch Compress 3000 DW FOO Installation Instructions Manual

4.10 What to expect from a "normal startup"

After the unit has been installed, with all electrical and water
connections secured and checked, the unit should be filled
with water and purged ( section 4.8). The appliance will
perform according to table 5 after purge function has been
selected. In case the appliance is unplugged from mains and
switched on again, the display will remain inactive for a few
moments and the normal startup will be according to table 6.
Elapsed time HPWH actions
0 to 5 minutes Unit is silent.
Water pump runs to complete the purge
procedure.
5 to 7 minutes Fan starts operating
7 minutes and Compressor in operation
beyond
Table 5 Normal startup when purge procedure is selected
Elapsed time HPWH actions
0 to 2 minutes Unit is silent.
Water pump runs during the first minute.
2 to 4 minutes Fan starts operating
4 minutes and Compressor in operation
beyond
Table 6 Normal startup when the appliance is switched on
after have been unplugged from mains.
If the ambient temperature is outside of the
range -7 °C / +40 °C, the appliance will not be
able to run by using the heat pump cycle. The
electric element will be used until the
ambient air temperature returns to the
operating range, therefore, the unit will not
follow the startup described in tables 5
and 6.

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 of 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.
Compress 3000 DW FOO
The weekly LEG mode requires additionally 6 to 8 hours.
Therefore once a week this additional period must be ensured
to complete the thermal disinfection. It is recommended to
program 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 5.7.2). 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 5.7.2) 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.
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!

4.12 Demand response

In a near future electrical energy management is foreseen to
use communication with the electrical appliances to minimize
grid load peaks and increase electrical energy distribution
efficiency. This communication, named demand response, will
be based in signals sent through the grid to which the electrical
appliances are required to react accordingly. The end user is
expected to benefit from lower tariffs when using appliances
demand response capable.
The Compress 3000 is technically demand response ready.
The Compress 3000 is technically prepared to what is
expected to be known as Demand Response Modes 1 and 4
(DRM1 and DRM4). Under DRM1 the appliance is
automatically switched ON or OFF according to the grid signal.
Under DRM4 the appliance will automatically increase the set
point to 66 °C (10% higher than the highest set point possible
to be set) when the respective signal is sent through the grid.
The interface between the grid and the appliance requires a
Demand Response Enabling Device (DRED) and a BOSCH
accessory. The availability of this feature and accessories
requires regulation approval and release by the government
authorities.
Installation instructions | 23
6 720 808 869 (2014/06)