Exhausto VEX260 Manuale utente
VEX260/270/280
Electrical installation guide
for EXact2 control system
Electrical installation........................................ Chapter 1 + 2
Original instructions
3005079-2017-11-28 Electrical installation guide_VEX260-270-280
EXHAUSTO A/S
Odensevej 76
DK-5550 Langeskov
Tel. +45 65 66 12 34
Fax: +45 65 66 11 10
www.exhausto.com
1. Connection diagram for supply voltage and connection box
1.1. Key to connection diagram ..................................................................................5
1.2. Connection diagram.............................................................................................. 6
1.2.1. Wiring diagram for supply voltage and connenction box .................................6
1.2.2. Termination.......................................................................................................7
1.3. Cable plan...............................................................................................................8
2. Installation of the VEX
2.1. Installation.............................................................................................................. 9
2.1.1. Connections in the connection box.................................................................. 9
2.1.2. NB:................................................................................................................. 10
2.2. Dimensioning and electrical installation........................................................... 10
2.2.1. Installation requirements and recommendations.......................................... 10
2.3. Electrical components.........................................................................................12
2.3.1. Terminal board on EXact2 main board...........................................................13
2.3.2. Connecting shielded cable to MODBUS........................................................ 14
2.3.3. Service – connection of additional HMI control panel.................................... 15
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Symbols, terms and warnings
Prohibition symbol Failure to observe instructions marked with a prohibition symbol
may result in serious or fatal injury.
Danger symbol Failure to observe instructions marked with a danger symbol
may result in personal injury and/or damage to the unit.
Scope These instructions apply to the EXHAUSTO EXact2 control system. Please refer
to the product instructions regarding accessories and extra equipment.
The instructions must be fully observed to ensure personal safety and to protect
the equipment and ensure its correct operation. EXHAUSTO A/S accepts no liabil-
ity for accidents caused by equipment not used in accordance with the manual’s
instructions and recommendations.
Warnings The work must be performed by an authorised electrician, in ac-
cordancewith locally applicable regulations and legislation.
Opening the unit Do not open the service doors before the supply voltage has
been disconnected at the isolation switch and the fans have
stopped. The isolation switch is positioned on the left side of the
connection box on top of the unit.
Lock the air han-
dling unit during
operation
The VEX unit must always be locked
during operation:
● Use the cylinder lock in the han-
dle. Remember to remove the key
from the lock.
● Or use a padlock. Use the han-
dle’s built-in padlock fixture.
Lock
Padlock fitting
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Rating plate The VEX unit rating plate shows:
● VEX unit, type (1)
● production number (2)
1
2
NB Always have the production number ready when contacting EXHAUSTO A/S.
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1. Connection diagram for supply voltage and connection box
1.1 Key to connection diagram
Diagram The diagram on the following page illustrates the connection of the power supply,
HMI display panel and various accessories that can be connected to the connec-
tion box.
Diagram explana-
tion given on the
following page Term Description Supplied by
-A1 Connection box EXHAUSTO
-A2 Connection box for heating coil/cooling unit EXHAUSTO
-A3 Connection box for electric heating coil (if fitted) EXHAUSTO
-F1 Distribution board fuses Customer
-Q1 Distribution board group switch Customer
-F2 Connection box control fuses EXHAUSTO
-Q2 Connection box isolation switch EXHAUSTO
NB: Other parts, shown on the front page of the VEX instructions, are supplied by EX-
HAUSTO
Accessories See instructions for the relevant accessories:
● HCW water heating coil
● HCE electrical heating coil
● CCW cold water coil
● MXCU, module for external cooling unit
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1.2 Connection diagram
1.2.1 Wiring diagram for supply voltage and connenction box
VEX260-270-280,
3x400V
* Not supplied by EXHAUSTO
** 120 Ω terminating resistor
*** Terminal block for continuation of 24 VDC
**** Only if IHCW
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and connection box
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1.2.2 Termination
The first and last devices on the bus must be terminated. The diagrams below
show two termination examples. See position of jumper JP2 on AHUC in section
"Terminal board on EXact2 Main board".
If Then See diagram no.
HMI is the only device on
the bus (bus connector
optional)
the jumper must be connec-
ted to JP2, which applies a
resistance of 120 Ω
1
both buses are used the jumper must not be con-
nected
2
the bus connectors are
not used
the jumper must be connec-
ted to JP2 as per diagram 1,
which applies a 120 Ω resist-
ance
1
1.
2.
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1.3 Cable plan
The cable plan below shows the accessories that can be connected in the connection box.
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and connection box
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2. Installation of the VEX
2.1 Installation
VEX unit The electrical installation for the air handling unit comprises the following connec-
tions:
Connection to VEX unit:
● Connection box
● Optional electrical heating coil HCE
● Optional water heating coil HCW
● Optional MXCU module for external cooling unit
● Optional CCW cold water coil
2.1.1 Connections in the connection box
Wiring configura-
tions
Wiring configurations for the terminal board in the connection box are shown in
the table below.
Wiring configurations See section
Supply voltage 2.2
HMI control panel via modbus 1
Modbus components via modbus 1
on termination and instructions for the
component in question
Control box for heating coil (water
heating coil), MHCW module, via
modbus
1
on termination and instructions for water
heating coil HCW
Control box for heating coil (electric
heating coil), MHCE2 module, via
modbus
1
on termination and instructions for elec-
tric heating coil HCE
Control system for external cooling
unit MXCU
1
on termination and instructions for
MXCU module
External start* below
Closing damper in exhaust air LSA/
LSAR
1
Closing damper in outdoor air LSF/
LSFR
1
Fire and AUX IN* 1
and below
* External start, Fire
and AUX IN
Note following with regard to jumpers on EXact2 main board.
If Then
Fire is used the jumper between terminals 20 and 21 must be removed
AUX IN used the jumper between terminals 22 and 23 must be removed
EXT start is used the jumper between terminals 24 and 25 must be removed
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2.1.2 NB:
NB:
The door must be kept clear.
No cables or equipment of
any kind may be fitted to the
door
2.2 Dimensioning and electrical installation
● The supply cable must be dimensioned and installed in ac-
cordance with applicable rules and regulations.
● The earth terminal (PE) must always be connected.
Diagram The supply voltage must be connected to the isolation switch as shown in the dia-
gram in the section “Connection diagram for supply voltage and connection box”.
2.2.1 Installation requirements and recommendations
Isolation switch and
control fuses
An isolation switch and control fuses are built into the unit to provide overload and
short-circuit protection.
Fuses The fuses must be suitable for:
● Short-circuit protection of the unit
● Short-circuit protection of the supply cable
● Overload protection of the supply cable
Max. rating Maximum fuse rating is 63 A (gG/gL).
Power supply cable When dimensioning the supply cable, the conditions at the installation location, in-
cluding temperature and cable duct layout, must be taken into consideration.
Earth leak circuit
breaker
● The unit must be protected against indirect contact.
If current earth leak circuit breakers are fitted in the installation, they must
be of a type that meets the following requirements:
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