Table of Contents
Advertisement
Other Ways of Control
External control
This enables the control unit to be connected to other technol-
ogy using single- or two-contact control. The Auto operating
state of the air-handling unit is always the default state for
external control.
Single-Contact Control
This type of control can be performed in two ways (Start (default)
or Start and Stop functions) depending on the data point setting.
Start function: By activating the switch (switching 1/0), the
air-handling unit is put into the Run operating state (fan output
stage and temperature mode). The control unit time in the Run
state is always given by the timer settings. Another activation of
the switch will prolong the control unit time in the Run state for
a pre-set time in the timer. Once the pre-set time has elapsed,
the unit will go into the Auto operating state. If the timer is set
to zero, the contact input is ready for the switch action (on-off,
switching 1) – if the switch is in the "On" position, the air-handling
unit is in the Run operating state; after switching to the "Off"
position, the air-handling unit will go into the Auto state.
Start and Stop function: By activating the switch "Start func-
tion" (switching 1/0), the air-handling unit is put into the Run
operating state (fan output stage and temperature mode) for
the timing period. Upon activation of the switch "Stop function"
in the active timing interval, the pre-set operating mode will be
stopped and the unit will go into the Auto state. The air-handling
unit will also go into the Auto state once the timing interval has
elapsed. If the timer is set to zero, the contact input is ready for
the switch action (on-off, switching 1) – if the switch is in the
"On" position, the air-handling unit is in the Run operating state;
after switching to the "Off" position, the air-handling unit will go
into the Auto state.
Two-Contact Control
This enables the selection of two Run mode operating states
(Higher and Lower). Each Run operating state is set in a different
temperature mode and fan speed stage. By combining the Stop
or Auto operating modes, it is possible to set the required state
of the Run mode. The contact states can be combined as follows:
Operating mode
1st contact
Auto
Lower stage
Higher stage
Stop
Setting of the Run operating state (temperature mode and
fan output stage) and timer (only for one specific device) is
performed using the HMI-SG controller in the List of Data
Points in the section Settings – External Devices.
The two-contact control is also used (factory setting) for the
use of REMAK ORe2 series wall-mounted controllers and
ORe1 (this controller series does not use one of the manual
stages).
2nd contact
Off
Off
On
Off
Off
On
On
On
Control units VCS
Remote Signalling
The VCS Control unit can optionally be equipped
with one or two outputs for remote signalling.
Depending on the configuration, the following:
n
Only failure (non-potential contact, max. load 230 V/1 A)
n
Failure and operation (2 non-potential contacts, max. load
230 V/1 A).
59
Advertisement
Table of Contents
