Exhausto VEX320C User manual

Electrical installation guide
for VEX320C/330C/330H with EXact2 control system
ON
Electrical installation........................................Chapter 1 + 2
Original instructions
3004224-2014-09-03 VEX320-330_EXact2
EXHAUSTO A/S
Odensevej 76
DK-5550 Langeskov
Tel. [phone]
Fax [phone]
[email protected]
www.exhausto.dk

1. Connection diagram for supply voltage and connection box
1.1. Connection diagram .............................................................................................5
1.1.1. Connection diagram for supply voltage and connection box...........................6
1.1.2. Termination......................................................................................................7
1.2. Cable plan...............................................................................................................8
2. Installation of the VEX
2.1. Scope of installation..............................................................................................9
2.1.1. Connections in the connection box..................................................................9
2.2. Dimensioning and electrical installation...........................................................10
2.2.1. Installation requirements and recommendations...........................................10
Electrical wiring........................................................................................................10
2.3. VEX300C, electrical components.......................................................................12
2.3.1. VEX300C, components in connection box....................................................13
2.4. VEX330H, electrical components.......................................................................14
2.4.1. VEX330H, components in connection box....................................................15
2.5. EXact2 main board..............................................................................................16
2.5.1. Terminal board on EXact2 main board..........................................................16
2.5.2. Connecting shielded cable to MODBUS........................................................17
2.5.3. Service – connection of additional HMI control panel....................................18
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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 Failuretoobserveinstructionsmarkedwithadangersymbolmay
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 liability for
accidents caused by equipment not used in accordance with the manual’s instruc-
tions and recommendations.
Warnings The work must be performed by an authorised electrician, in ac-
cordance with locally applicable regulations and legislation.
Warnings
Opening the unit Donotopentheservicedoorsbeforethesupplyvoltagehasbeen
disconnected at the isolation switch. The isolation switch is posi-
tioned on the side of the connection box on top of the unit.
ON OFF
Information plate The VEX unit information plate
shows:
1. VEX model
2. Production order no.
1
2
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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 Connection diagram
Diagram The diagram on the following page illustrates the connection of the power supply,
HMIdisplay paneland variousaccessories thatcan beconnected atthe connection
box.
Diagram explana-
tion given on the fol-
lowing page Term Description Supplied by
-A1 Connection box EXHAUSTO
-A3 Connection box for electric heating coil (if fitted) EXHAUSTO
-F1 Distribution board fuses Customer
-Q1 Distribution board group switch Customer
-Q2 Connection box isolation switch EXHAUSTO
Further info See also "EXact2 main board" section for more information on components which
can be connected.
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 heating coil - water
●HCE heating coil - electric
●MXCU, module for external cooling unit
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1.1.1 Connection diagram for supply voltage and connection box
* not EXHAUSTO delivery
** 120 Ωresistance to termination
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1.1.2 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 "Termi-
nal 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 connected
to JP2, which applies a resist-
ance 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 connected toJP2asperdiagram1,which
applies a 120 Ωresistance
1
1.
2.
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1.2 Cable plan
The cable plan below shows the accessories that can be connected in the connection box.
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2. Installation of the VEX
2.1 Scope of installation
VEX unit The electrical installation for the VEX unit comprises the following connections:
Connection to VEX unit:
●Connection box
●HCE heating coil (electric) (if any)
●HCW heating coil (water) (if any)
●MXCU module for external cooling unit (if any)
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 onterminationandinstructionsforMXCU
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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2.2 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 section 1.
2.2.1 Installation requirements and recommendations
Fuses The fuses must be suitable for:
●Short-circuit protection of the unit
●Short-circuit protection of supply cable
●Overload protection of supply cable
Max. rating Maximum fuse rating is 13 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:
●PFI type A breaker that breaks the circuit when a vagrant
current with DC content (pulsating DC) in accordance with
EN 61008.
●The circuit breakers must be marked with the following sym-
bol:
●Cutout time must be max. 0.3 s.
When there is cur-
rent leakage A leak current of up to 100 mA can be generated.
Electrical wiring
VEX type Motor Voltage Dimensioned power con-
sumption
VEX320C/330C/330H -1 1 x 230 V + N + PE 3.1 A
VEX320C/330C/330H -2 1 x 230 V + N + PE 5.3 A
Short-circuit current Maximum short circuit current (lcu), in accordance with EN60947.2 is 10 kA.
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Accessories Accessories of type MHCW, MHCE2 and MXCU must be connected to the external
bus of the VEX and be separately powered.
Circulation pump
(IHCW) If the HCW coil is connected directly to AHUC (IHCW), the circulation pump may be connected to EXact2 main board. The circulation pump may not draw more than
2.0 A, and its cable must be dimensions for a 13 A fuse.
Equalising connec-
tions Equalisingconnections must be established betweenthe VEX and HCE-type
accessories.
Isolation switch, in-
side Connect supply volt-
age here!
Remove the red cover when
connecting
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2.3 VEX300C, electrical components
Positioning of elec-
trical components The drawing below shows the location of bypass damper motor, motor control and flow and pressure meters.
MC1 MC2
BP1
Supply air
Extract air
Exhaust air
Outdoor air
MPT1 MPT2
MPT3
RD13179GB-01
Component Explanation
BP1 Bypass damper motor
MC1 Motor control, extract/exhaust air motor
MC2 Motor control, outdoor/supply air motor
MPT1 AFC (airflow control)
MPT2 MPTF (pressure drop over filter)
MPT3 DEP(Ice detection in case of pressure drop over counterflow heat
exchanger)
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2.3.1 VEX300C, components in connection box
Components
Pos. Component
A Terminal board
B EMC filter
C Power supply
D MPT1 (AFC)
E MPT2 (MPTF)
F EXact2 main board PCB
G Cable to HMI
H MPT3 (DEP)
I Bypass motor
J Isolation switch
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2.4 VEX330H, electrical components
Positioning of elec-
trical components The drawing below shows the position of bypass damper motor, motor control and airflow control
Supply air
Exhaust air
Extract air
Outdoor air
BP1 MPT1 MPT3
MC2
MC1
MPT2
RD13180GB-01
Component Explanation
BP1 Bypass damper motor
MC1 Motor control, extract/exhaust air motor
MC2 Motor control, outdoor/supply air motor
MPT1 AFC (airflow control)
MPT2 MPTF (pressure drop over filter)
MPT3 DEP(Ice detection in case of pressure drop over counterflow heat
exchanger)
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2.4.1 VEX330H, components in connection box
Components
Pos. Component
A Terminal board
B Isolation switch
C EMC filter
D Power supply
E EXact2 main board
F Cable to HMI
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2.5 EXact2 main board
2.5.1 Terminal board on EXact2 main board
The layout drawing below gives an overview of components (standard + accessory) that can be connected to
the terminal blocks.
Component Terminal board
connection Description
BUS 1 - 4 Bus for external parts
BUS 5 - 8 Bus for external parts
TE... + MVM 9 - 19 Taken together, these terminals constitute IHCW, which can be used for
controlling the HCW coil. See also the HCW instructions.
Fire 20 - 21 BT40, BT50, BT70
Smoke detector or other fire detection switch
AUX IN 22 - 23 Same function as Fire
EXT start 24 - 25 If this is connected, the device can be started
If this is interrupted, the unit will stop
LSA 26 - 28 LS, exhaust air closing damper
LSAR, exhaust air closing damper with spring return
LSF 29 - 31 LS, outdoor air closing damper
LSFR, outdoor air closing damper with spring return
Alarm 32 - 34 General alarm
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Component Terminal board
connection Description
AUX OUT 35 - 36 Fire alarm out for controlling smoke evacuation damper or combustion gas
fan.
Light/CP 37 - 38 Light or circulation pump (if IHCW has been selected, the CP function is
activated)
USB USB For service use
DI SPARE TIMERBUTTON2/TIMERBUTTONEU2
AI SPARE CO2B/RHB
OUT 24 V supply for MLON/MTCP
Service HMI Service HMI Plug for connecting extra HMI panel, see section "Servicing - connection of
extra HMI control panel"
Jumper
JP1 Option for termination, internal BUS
JP2 Termination option, external BUS, see section 1
JP3 BP2/M1 Configuration BP2/M1 (motor size 1: PWM, motor size 2: REL). Set at the
factory.
JP4 BP3/M2 Configuration BP3/M2 (motor size 1: PWM, motor size 2: REL). Set at the
factory.
Web server (accessory)
Web server CN2 Ethernet
Web server CN3: Connection of BMS
Web server JP2 To be terminated if BMS is connected to CN3 (shown as ON).
2.5.2 Connecting shielded cable to MODBUS
Cable type MODBUS requires shielded cable of type 2 x 2 x 0.25 □twinned pair conductors.
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Connection Wires and screen must be connected as shown in the table below
Wires Ste
pAction See
Conductors
Symbol:
Twinned
pair con-
ductors
1 Strip minimum amount of insulation from con-
ductors and ensure they are not damaged/
snapped
2Twist 0V conductor and 24V conductor togeth-
er C
3 Twist conductor A and conductor B together D
The conductors must be twisted as far down to-
wards the terminals as possible. Max. distance
from twists to terminal board: 1.5 cm.
E
Screen 1 Strip insulation from screen from point ahead
of cable clamp (F)
2 Mount the clamp to enclose the screen and
hold the cable in place F
3 Take some of the cable screen and run it into
the terminal board together with the 0V con-
ductor
G
2.5.3 Service – connection of additional HMI control panel
An additional HMI control panel connected during servicing overrides the HMI panel
connected to the unit. Refer to the EXact basic instructions for further information.
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