Technical Terms - Bosch CRC200 User Manual

Technical terms

Auto mode
The heating system is heating in accordance with the time
program and an automatic changeover takes place between
operating modes.
Operating mode
The operating modes are Heating and Setback. They are
depicted by the symbols
modes is assigned a "desired" room temperature that can be
changed.
Instantaneous water heater
With this type of water heating, hot water is available on
demand. Compared with water heating with a DHW tank, it can
take longer for the required temperature to be reached at the
taps. This delay can be reduced by activating temperature
maintenance ( Temperature maintenance).
Frost protection
Frost protection prevents system components from freezing.
With strictly room temperature-dependent control, frost
protection is in effect only in the room where the user interface
is installed. An additional outdoor temperature sensor can
ensure frost protection for the entire system even with strictly
room temperature-dependent control.
Required room temperature (also desired or set
temperature/set room temp.)
The room temperature to be achieved by the heating system. It
can be set individually.
Factory settings
Values stored permanently in the user interface (e. g. complete
time program), that can be restored by you or your contractor
when necessary (e. g. Reset Sched.).
Manual operation
The automatic mode and time program are interrupted during
manual operation. The system maintains the set room
temperature constantly and without setback.
Mixer
Assembly that automatically ensures that hot water can be
drawn from the taps at a temperature no higher than the
temperature set on the mixer. It is not installed in every system.
Switching time
A particular time at which the heating begins to heat. In the
automatic mode, water heating also depends on the switching
times. The switching time is a component of the time program.
CRC200
and . Each of these operating
Thermal disinfection
This function heats up the domestic hot water to a temperature
above 140 °F (60 °C) sufficient to kill pathogens (e. g.
legionella). Heed the safety instructions for the danger of
scalding.
Supply temperature
Temperature at which the heated water flows in the space
heating system from the heat source to the heating surfaces in
the rooms. To reduce heat losses and save energy, today's
designs provide for lower supply/return temperatures, e. g.
140/104 °F (60/40 °C).
Temperature maintenance
If temperature maintenance is activated for a heat source, the
heat source upstream of the water heating does not have to be
heated according to the instantaneous flow principle. This
makes hot water available more quickly.
DHW tanks
A DHW tank stores large quantities of heated drinking water
(e.g. 32 gal / 120 liters) and thus provides sufficient hot water
at the taps.
Time program
A time program automatically switches the operating mode at
fixed times. If the automatic mode is activated for water
heating, the time program for heating also determines the
switching times for water heating and operation of the
recirculation pump.
DHW recirculation pump
A recirculation pump circulates the hot water between the
water heater and tap. Thus hot water is available more quickly.
Technical terms | 25
6 720 821 652 (2017/05)