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Temperature modes, Humidity modes, Time modes
Temperature modes
The VCS control unit system offers the possibility to maintain
the controlled room or supply air temperature using two user
adjustable temperature modes:
n
Comfortable (normal mode usually used for temperature
control)
n
Economy (e.g. night moderate heating)
Temperature modes are defined by the levels and staging of the
required temperature set-points, respectively the temperature
difference (systems with heating and cooling) – i.e. according
to the environment comfort. They also affect the operating
energy demand. Each temperature mode is defined by the tem-
perature settings for heating (lower environment temperature
limit – minimum temperature) and the temperature settings
for cooling (upper limit – maximum temperature). The area of
maintained controlled temperature ("dead zone") lies between
these temperature set-points. Of course, maintaining the pre-
set temperatures is dependent on the correct dimensioning of
heating or cooling systems. The temperature modes are preset,
see data points Settings - temperature modes.
Warning
Settings, respectively the control process, also affect the cor-
rection values.
Figure 17 – temperature modes
Temperature modes
Comfort-heating
Comfort-cooling
Economy-heating
Economy-cooling
Humidity modes
For applications with humidity control, the comfort and
economy modes are extended by the desired relative humidity
values – depending on the application – dehumidification and/
or humidification.
Figure 18 – humidity modes
Humidity modes
Comfort-humidification
Comfort-dehumidification
Economy-humidification
Economy-dehumidification
Time modes
The VCS control unit system provides the possibility to control
operation depending on pre-set time schedules (modes).
n
Daily schedule – allows max. 6 changes per day (mode with
the lowest priority)
n
Weekly schedule – allows max. 7 changes per week
n
Exception schedule – allows max. 10 changes per week
Switch-off schedule – allows max. 10 changes (mode with the
highest priority)
These modes interact, applying the system priorities. At any
time, the air-handling operation is always controlled by the time
schedule with the highest priority provided that it has an active
time interval for that moment. The weekly and daily schedules can
be overridden by the exception schedule or switch-off schedule at
any time. The daily schedule is arranged for each day of the week.
The weekly schedule is the same for each week of the year.
Requirements for specific days (e.g. holidays) must be scheduled
within the exception time schedule. The following parameters are
set for the weekly and daily schedules:
n
Start time (= end of previous interval)
n
Fan output (speed) stages
n
Temperature mode
The exception and switch-off schedules can be set for:
n
Date – day of the week
n
Range of days – a period (e.g. holiday)
n
Week – days of the week (Monday, Tuesday,...)
Warning! A time interval of 00:00 must be set for the start of
each day. This is the starting point (change) of the daily schedule
with the default state of STOP – the operational mode from
the previous day does not continue!
The default setting is weekly and daily time schedule.
Temperature modes in weekly and daily time schedules can be
set using the HMI-SG controller in List of Data Points in the Set-
tings section – Temperature modes, the chapter Control (HMI-SG
controller). The exception and switch-off schedules can be set
using HMI-DM, HMI-TM or HMI@Web controllers.
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22.6°C
Time Schedule Operating Settings
24.6°C
Date
20.6°C
Starting day: *,01.01.12
28.0°C
Starting day: Mo,*.*.**
Starting day: *,*.Even.**
Range of Days
Starting day: *,23.06.12
End: *,12.07.12
Starting day: *,23.12.**
End: *,31.12.**
1/4
Starting day: *,23.12.11
40.0%
End: *,01.01.12
Starting day: *,*.*.**
60.0%
End: *,*.*.**
30.0%
Week
70.0%
Day of the week: *,fri,*
Day of the week: *,Fri,Even
Day of the week: *,*,*
Day of the week: 2.,*,*
Control units VCS
1st January 2012 is the specific day of operation.
Every Monday is the specific day of operation.
Every even month (February, April, June,...) is
the specific month of operation in each year.
Days from 23rd June 2012 to 12th July 2012
are the specific days of operation in the year.
Days from 23rd to 31st December are the specific
days of operation in each year.
Days from 23rd December 2011 to 1st January
2012 are the specific days of operation.
An exception time schedule or a switching off
schedule is permanently active and the weekly
program will not be applied!
Every Friday is the specific day of operation
Every Friday in an even month (February, April,
June,...) is the specific day of operation
When the starting day is entered in this way,
an exception time schedule or a switching off
schedule is permanently active and the weekly
program will not be applied!
The second week of every month is the specific
day of operation.
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