Fig. 4.11 Duration of validity of target value changes
(here: Target room temperature)
The upper diagram in Fig. 4.11 shows a programmed time
window (see Section 4.7.1) and corresponding room
target temperature (21 °C).
In the lower diagram, at (
1) the value of the room
temperature is changed (20 °C). The control system
uses this value until the start of the time window.
From here (
2) the control system uses the room
temperature of the time window (21 °C).
At (3) the value of the room temperature is changed
(17 °C).
The control system uses this value up to the end of the
time window (
4).
Once the time window has elapsed, the system is
controlled with reference to the set-back temperature
(15 °C).
h
Note
The characteristic described also applies to the
same extent for the target hot water.
4.5 Operation level for the operator,
operation level for the expert technician
The VRT 392f is equipped with two operation levels.
Each level contains several screens in which the various
parameters can be displayed, adjusted or changed.
– Operation level for the operator
Used to display and set/change the basic parameters.
The setting/changing of parameters can be carried out
by the user without any special previous knowledge
and during normal operation.
– Operation level for the expert technician
Used exclusively by the expert technician to display
and set/change specific parameters.
4.6 Screens at the operation level for the
operator
The screens at the operation level for the operator are
arranged according to the sequence shown in Table 4.4
below.
This table shows you which parameters you can adjust
and change.
Examples of this are given in Section 4.7 and in the
following sections.
This is the way you get from the simplified basic display
to the first display screen "basic data" of the operator
level:
Click one or both dials.
You get to the basic display.
Turn the left-hand dial by one or two points in the
clockwise direction.
Basic data
1
Date 21. 06. 06
Day We
Time 12 : 00 o'clock
Summer/Winter changeover Auto
> select day
Fig. 4.12 Screen "basic data"
(example: selecting the day of the week)
By turning the left-hand dial further you will scroll from
one screen to the next.
If accessory components are installed and are controlled
via the VRT 392f, additional screens apart from those
listed in Table 4.4 can be displayed, e.g.
3 or 6.
Operation 4
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