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Technical terms
HMC300 – 6 720 813 192 (2014/10)
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.
Optimised mode
In optimised mode the automatic mode (time program for
house heating) is not active and the system provides heating
continuously according to the temperature set for optimised
mode.
Reference room
The reference room is the room in the home where a room unit
has been installed. The room temperature in this room acts as
the control variable for the assigned heating circuit.
Switching time
A certain time at which the heating system starts to heat or hot
water is produced, for example. A switching time is a
component of a time program.
Temperature of an operating mode
A temperature that is assigned to an operating mode. The
temperature is adjustable. See the explanations on operating
mode.
Thermal disinfection
This function heats up the hot water to a temperature in excess
of 65 °C. This temperature is sufficient to kill off pathogens
(e.g. legionella). Observe the anti-scalding safety instructions.
Holiday program
The holiday program enables the settings that would ordinarily
be applied to be interrupted for a number of days. After the end
of the holiday program, the programming unit resumes
operation with the settings that would ordinarily be applied.
Flow temperature
The temperature that the heated water maintains in the central
heating circuit, from the heat source to the heating surfaces in
the rooms.
Water heater
A water heater stores large volumes of heated tap DHW.
Thereby, sufficient DHW is available at the draw-off points (e.g.
taps). This is a prerequisite for longer hot shower.
Time program for the heating system
This time program ensures automatic changeover between
operating modes at defined switching times.
Time program for hot water heating
This time program means that the system automatically
switches between the modes DHW, DHW reduced and Off at
fixed break points. It can be connected to the time program for
house heating ( chapter 5.3.2, page 20).
Time program for circulation
This time program ensures automatic operation of the DHW
circulation pump at defined switching times. Linking this time
program to the time program for hot water is recommended.
Hot water circulation pump
A hot water circulation pump allows the hot water to circulate
between the hot water heater and the taps. In this way you have
quick assess to hot water at the taps. The circulation pump can
be controlled with a time program.
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