7
Control units VCS
Location, Installation
e units must be stored in rooms complying with the following
conditions:
nMaximum relative air humidity must not exceed 85%, with-
out water condensation
nAmbient temperature between –25°C and +60°C
Dust, water, caustics, corrosive agents or other materials nega-
tively affecting the structure or the unit’s components (causing
degradationof plastic partsandinsulation) mustnotenter theunit.
Installation and Location
e boxes are supplied according to the configuration as either
wall-mounted (for hanging on the wall) or freestanding (standing
independently on the floor). e placement of the VCS control unit
should consider easy access for operation and convenient cable
connection. e box must be installed separately with cooled side
walls. eventilatedbox shouldhave aminimumoffset of15 to20
cm from the side walls to ensure airflow for cooling and access for
filter replacement, which is installed in front of the fan. e surface
where the unit is installed should be smooth without irregularities.
When positioning the unit, it is important to have sufficient
space on the service side of the unit for maintenance and service
operations. ey can be mounted directly on substrates with fire
resistance classes A and B according to EN 13501-1.
e VCS control units in the switchboard boxes are mounted
in the vertical position directly on the wall. e KAEDRA plastic
switchboardbox canalsobe partiallyembedded underplaster. e
VCS unit installed in steel switchboard boxes can also be placed
directly on the floor. e cables can be run along cable trenches,
cable trays or under plaster.
e power cables are connected from below.
We recommend the wall-mounted units be fixed to the wall using
dowels and screws suitable for the wall structure.
e control units are designed for:
a)normal environment (indoor,withoutexcessive dust,moisture,
or the presence of explosive atmospheres in the air, etc.). e
permissible ambient temperature ranges from 0°C to +40°C (with
an average value not exceeding +35°C over a 24-hour period).
b) outdoor environment (light dust, humidity <90% relative
humidity without condensation, without explosive atmospheres
in the air, etc.). e permissible ambient temperature can vary
depending on the configuration, ranging from -25°C or -40°C to
+35°C (withanaverage valuenotexceeding +35°Cover a24-hour
period), and the maximum altitude is 2000m above sea level.
e placement of the outdoor box should be considered based
on local conditions. Particularly, direct sunlight should be avoided
as it can lead to failure to meet the necessary temperature condi-
tions (or overheating).
Note: As appropriate, the above-mentioned instructions apply
also for control units integrated into the air-handling unit while
observing the control unit installation and operating instructions
delivered with the air-handling unit. Check the completeness and
intactness of the delivery in accordance with the bill of delivery
before installation.
nIt is forbidden to remove, bypass or disconnect the safety
equipment, safety functions and guards.
nOnly air-handling components in perfect condition can be
used. Failures affecting the equipment safety must be re-
moved immediately.
nAll safety measures against electrical accidents must be
strictly observed. Any action resulting in restriction, even
temporary, of the safety and protection functions must be
avoided.
nIt is strictly forbidden to remove safety guards, casings or
other safeguards, operate the equipment or its components
if the safeguards are disabled or restricted.
nAny action resulting in restriction of the prescribed insulation
of the safety voltage must be avoided.
nWhen changing fuses, it is necessary to ensure the non-volt-
age state of the control unit and use only the specified fuses
and protection elements.
nIt is necessary to eliminate electromagnetic interference and
the harmful effects of over-voltage on the signal, control and
power cables, which could unintentionally initiate dangerous
actions and functions or cause destruction of the electronic
parts in individual components.
nNever work on the connected equipment under voltage! Be-
fore starting work on the air-handling unit, switch off and
lock the master switch to disconnect the supply voltage.
Use protective and work aids in accordance with the Service
Regulations and standards applicable in the country where
the unit is installed.
nIf individual technical assemblies of the air-handling unit are
equipped with service switches, and if allowed by the Service
Regulations, installation conditions and characteristics, then
such assembly (e.g. heater, fan, etc.) can be disconnected by
switching off and locking the corresponding service switch.
nNever use abrasive cleaners, cleaners unsuitable for plastics
or acid or alkaline solutions to clean to unit.
nAvoid splashing water, impacts and vibrations.
Each air-handling equipment component must always be
installed in accordance with the appropriate installation in-
structions.
e manufacturer recommends fully ensuring the flawless
condition and functioning of all protective elements and
equipment. Aer failures, such as short circuits, have been
removed, check the functionality of the automatic circuit
breakers and protective elements, and verify the condition of
the protective wiring interconnection and grounding.
To ensure safe operation, it is necessary to verify the condi-
tions of the water heating/cooling pumps – perform manual
pump turning and set the output curve (over-design impairs
the control quality).
Warning: If the remote control is used (including automatic
schedule program), safety access must be ensured for each
physical interference or entry into the air-handling unit (inspec-
tion, maintenance or repair) – i.e. disconnect the power supply
by turning off the switch – avoid remote initiation of the unit by
other users when work is being performed on the unit.
Transport and Storage
Before Installation
VCS control units are packed in cardboard boxes or installed in the
corresponding air-handling unit section, if they are integrated into
the air-handling unit. Measures for handling fragile goods must be
taken when handling the unit.
