Equipment Characteristics, Box Design - Remak VCS Installation And Operating Instructions Manual

Equipment characteristics, Unit Design
Application
VCS control units are complex control and power electrical
systems used for the decentralized regulation and control of
air-handling systems. They provide the equipment with high
stability and safety while allowing easy control, including the
viewing of operating states. (STOP - OPERATION - AUTO).
Main Features
The VCS control unit is intended for the following:
n Complex autonomous control of air-handling systems
n
temperature and humidity control in the supply or space
(cascade control)
n Supply and power actuation of air-handling systems
n Protection and safeguarding of connected components
This control unit provides air-handling systems with control
and safety functions. It can be equipped with the necessary
number of proportional inputs and outputs depending on the
required functions.
Sophisticated control algorithms ensure system stabil-
ity, user-friendly control and energy savings. Another
advantage is that the control unit's features also contrib-
ute to energy savings in air-handling system operation:
n The unit can be set to 2 temperature settings, or even
humidity modes:
• Comfort
• Economy
n Time schedule setting options
(daily or weekly time schedules)
n
Additional operating mode setting options:
• Optimized start
• Temperature start-up
• Night chilling
n Precise drive control using data communications
(Modbus RTU protocol)
n
Superior antifreeze protection with moderate heating of
the heat exchanger during standby mode
n Precise analogue control of controlled peripheral units
(according to the controlled component)
Unit Design, Boxes
General information
These control units are designed in accordance with ČSN
EN 60204-1. The unit's control and power parts are situ-
ated in a single box. The components, control and actuating
elements, are fitted on the DIN bars inside the control unit.
Depending on the version, the VCS control unit can be provided
in plastic (plastic switchboard) or in sheet-steel (sheet-steel
switchboard). Both designs are equipped with transparent
doors. The controls are situated below these doors. Further,
the VCS control unit can be produced as a built-in assembly
and a part of an air-handling unit section, which must be
designed for that purpose and meet specific requirements.
n The VCS outdoor units, or their individual parts, are always
supplied with the boxes in painted steel sheet with full doors.
The indoor units come in either painted steel or plastic (not
for SKFM) boxes - both with transparent doors.
Control units VCS
Figure 1 – VCS control unit (plastic box design)
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n There are no controls mounted on the doors or on the
outside of the cabinets, the main switch is under the door
and the controllers (HMI) are on wired connections or on the
LAN (WLAN).
n In addition to the variants of separate (switchboard) en-
closures outside the air handling unit, the control units can be
built directly into the air handling unit (XPRJ section (control
and power section excluding FM) and XPFM (separate FM
installation), integrated control cabinet in the CAKE compact
unit).
Figure 2 – installation inside air handling unit
a) AeroMaster XP
n The individual instruments, control, operating, safety, etc.
elements inside the control unit are mainly mounted on DIN
rails on the supporting structures. In specific cases, they can be
mounted on the base plate (especially frequency converters).
n
For plastic enclosures, the door opening side (left/right)
can be user-adjustable. In the case of steel sheet, the side
design is fixed.
n The degree of protection (against contact with live parts,
ingress of foreign bodies and water) for the plastic enclosure
corresponds to IP65 when the door is closed and IP40 when
the door is open. For a sheet metal enclosure, the protection
is IP55 or IP66 (depending on the enclosure type) when the
door is closed and IP20 when the door is open. The sheet
metal enclosure with additional ventilation is IP54 when the
door is closed and IP20 when the door is open. The VCS in
the integrated version as a built-in and part of the air handling
unit is IP44 (with the door closed).
 Control unit box
 Screws
 Circuit breakers
 Disconnecter
 Master switch
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b) CAKE
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