Exhausto VEX300 Series User manual

Electrical installation guide
VEX310T-320T-330T-340T-350T
EXact2 control system
RD14103-01
ON
Electrical installation........................................ Chapter 2 + 3
Original instructions
3005999-2020-10-20 VEX300T_EXact2
EXHAUSTO A/S
Odensevej 76
DK-5550 Langeskov
Tel. [phone]
Fax: [phone]
[email protected]
www.exhausto.dk

Symbols, concepts and warnings
Symbols, terms and warnings.............................................................................. 3
1. Connection in automatic switchboard
1.1. Explanation electrical diagrams........................................................................... 4
1.1.1. Designations used and key to wiring diagram..................................................4
1.2. Electrical diagrams................................................................................................ 5
1.2.1. Connection diagram - 1-phase.........................................................................5
1.2.2. Connection diagram - 3-phase - Electric heating surface................................ 6
1.2.3. Termination.......................................................................................................7
1.3. Electrical diagrams - Cable plan...........................................................................8
1.4. Internal cable and wiring.......................................................................................8
1.4.1. Wiring diagrams............................................................................................... 8
1.4.2. Designation and key to wiring diagram............................................................ 8
1.4.3. Internal connections VEX310T - single phase............................................... 11
1.4.4. Internal connections VEX310T - 3-phase...................................................... 12
1.4.5. Internal connections VEX320T-350T - single phase......................................13
1.4.6. Internal connections VEX320-340T - 3-phase without control fuse............... 14
1.4.7. Internal connections VEX330-350T - 3-phase with control fuse.................... 15
1.4.8. Internal wiring and hoses............................................................................... 16
2. Installation of the VEX unit
2.1. Scope of installation............................................................................................17
2.1.1. Connections in the control system panel ...................................................... 17
2.2. Dimensioning and installation............................................................................17
2.2.1. Installation requirements and recommendations........................................... 17
2.2.2. Power of electric heating coil in VEX300T..................................................... 19
2.2.3. Electrical connection/data.............................................................................. 19
2.2.4. Isolation switch, internal in control system panel........................................... 21
2.3. Electrical components.........................................................................................22
2.3.1. Control system panel..................................................................................... 22
2.3.2. Terminal block on the EXact2 printed circuit board .......................................23
2.3.3. Connecting shielded cable to MODBUS........................................................ 25
2.3.4. Service – connection of additional HMI control panel.................................... 25
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Symbols, concepts and warnings
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 of the in-
struction manual
This instruction manual is for use with EXHAUSTO AHUs, hereafter named as the
VEX unit. This instruction manual deals with the electrical installation. Please refer
to the product instructions regarding accessories and extra equipment.
The instructions must be fully observed to ensure personal safety and the safety
of others, and to protect equipment and ensure the correct operation of the VEX
unit. EXHAUSTO A/S accepts no liability for accidents caused by a failure to use
the product in accordance with the manual’s instructions and specifications.
Warning The work must be performed by an authorised electrician, in ac-
cordance with locally applicable regulations and legislation.
Opening the air
handling unit
Do not remove the detachable doors/panels until the supply volt-
age has been disconnected at the isolation switch (arrow) and
the fans have stopped. The isolation switch is positioned on the
front of the connection box on top of the VEX unit.
ON OFF
RD14047-01
Information plate The information plate is positioned to the left of the control system box
The VEX unit information plate shows:
● the VEX variant designation
● unit production order no./year
NB: Always have the production order number ready when contacting EXHAUS-
TO A/S.
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1. Connection in automatic switchboard
1.1 Explanation electrical diagrams
Wiring diagram The following wiring diagrams illustrate the connection of the power supply, HMI
panels and various accessories that must be connected to the control system pan-
el.
1.1.1 Designations used and key to wiring diagram
Designation Key Supplied by
+A1 Control system panel EXHAUSTO
+A2 VEX unit EXHAUSTO
+A3 Connection box for heating coil/cooling unit EXHAUSTO
-F0 Distribution board fuses Customer
-Q0 Distribution board group switch Customer
-F1 Control fuse in control system box EXHAUSTO
-Q1 Isolation switch in control system box EXHAUSTO
-K1 EXact2 AHUC PCB EXHAUSTO
Accessories See instructions for the relevant accessories:
● MXHP module for external cooling/heat pump unit in connection with internal
DX coil
● MXCU module for external cooling unit in connection with internal DX coil
● MCOCW module for internal cooling/heating coil (water)
● MCCW module for internal cooling coil (water)
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1.2 Electrical diagrams
1.2.1 Connection diagram - 1-phase
* Not EXHAUSTO delivery
** 120 Ω resistance for end termination
*** Crown sleeve for continuation of 24 VDC
**** Only if HW (water)
***** Only if MCOCW / MXHP
Accessories
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1.2.2 Connection diagram - 3-phase - Electric heating surface
* Not EXHAUSTO delivery
** 120 Ω resistance for end termination
*** -F1 Automatic fuse. Only by:
● VEX330T HE2 10.41 kW
● VEX340T HE2 14.96 kW
● VEX350T HE1 12.65 kW
● VEX350T HE2 22.76 kW
Accessories
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1.2.3 Termination
The first and last device on the bus must be terminated. The diagrams below
show two termination examples. See position of jumper JP2 on EXact2 Main
Board 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 fitted in
JP2. This connects a 120 Ω
resistor.
1
If both buses are used the jumper must not be fitted 2
If the bus connector is
not used
the jumper must be fitted in
JP2. This connects a 120 Ω
resistor.
1
1.
2.
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1.3 Electrical diagrams - Cable plan
The cable plan below shows the accessories that can be connected to the control system panel.
1.4 Internal cable and wiring
1.4.1 Wiring diagrams
The following wiring diagrams show internal connections
1.4.2 Designation and key to wiring diagram
Accessories are a direct customer choice, and the options may be generated from
several factors.
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Designation Key Standard Accesso-
ries
Option
+A1 Control system panel X
+A2 VEX unit X
-B20 Automatic overheating
switch 50°C outdoors
X
-B21 Manual overheating switch
80°C in electric heating coil
X
-E2 electric heating coil (HE1/
HE2) in supply air chamber
X
-F1 Control fuse X
-K1 EXact2 AHUC PCB X
-K2 EMC filter X
-K3 Passive motor filter X
-K12 Contactor for starting elec-
tric heating coil
X
-K14 0–10 VDC solid state relay
for electric heating coil
(HE1/HE2)
X
-K21 MLON module X
-K22 MTCP module X
-K23 Web server PCB X
-K24 Option 9 PCB (IHCE control
of electric heating coil)
X
-K25 Wireless Access Point X
-M1 Extract air fan X
-M2 Supply air fan X
-M3 Bypass motor damper X
-Q1 Isolation switch X
-T1 Power supply 24 VDC X
-T1.1 Extract air temperature sen-
sor
X
-T1.2 Exhaust air temperature
sensor
X
-T2.1 Outdoor air temperature
sensor
X
-T2.2 Supply air temperature sen-
sor
X
-T-Ice De-icing temperature sen-
sor
X
-T-RPT Return water temperature
sensor in cooling/heating
coil
X
-T-SPT Supply air temperature sen-
sor in cooling/heating coil
X
-T-SUPPLY Supply air temperature sen-
sor after
X
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Designation Key Standard Accesso-
ries
Option
-X Terminal row 2,5□X
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1.4.3 Internal connections VEX310T - single phase
*Only for HW (water)
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1.4.4 Internal connections VEX310T - 3-phase
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1.4.5 Internal connections VEX320T-350T - single phase
*Only for HW (water)
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1.4.6 Internal connections VEX320-340T - 3-phase without control fuse
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1.4.7 Internal connections VEX330-350T - 3-phase with control fuse
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1.4.8 Internal wiring and hoses
* Set termination to ON (DIP switch 8) on the last of up to three MPT's. The number
of configured MPT's may be from one to three (-P1, -P2 and -P3)
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2. Installation of the VEX unit
2.1 Scope of installation
2.1.1 Connections in the control system panel
See following table for possible connections to the terminal block on the EXact2 cir-
cuit board.
Possible connections See section
Supply voltage 2.2 Dimensioning and installation
HMI control panel, via modbus 1.2 Connection diagram
MODBUS components, via MODBUS 1.2 Termination
See also the applicable component’s in-
structions
External start, Fire and AUX IN* 1.2 Connection diagram
and below
Closing damper, exhaust air LSA/LSAR 1.2 Connection diagram
Outdoor air closing damper LSF/LSFR 1.2 Connection diagram
Control of internal CW coil - MCOCW/
MCCW module
1.2 Termination
See also the module’s instructions.
Control for internal DX coil - MXHP/
MXCU module
1.2 Termination
See also the module’s instructions.
Fire thermostat BT40-70 1.2 Connection diagram
TE-RPT-X 1.2 Connection diagram
* External start, Fire
and AUX IN
Note following jumper settings for EXact2 main board
If then
Fire is used the jumper between terminals 20 and 21 must be removed.
AUX IN is 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.
2.2 Dimensioning and 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
Isolation switch and
control fuse
The control system panel has a built-in isolation switch.
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The inclusion of a built-in control fuse depends on the size of the VEX unit and the
size of the VEX unit’s internal electric heating coils (HE1/HE2).
See the overview below to see when the VEX unit has a built-in control fuse.
● YES = Built-in control fuse 4-pole, C-10A
● NO = no control fuse
VEX size With electric heat-
ing coil HE1*
With electric heat-
ing coil HE2*
Without electric
heating coil
310T NO NO NO
320T NO NO NO
330T NO YES NO
340T NO YES NO
350T YES YES NO
*See table "Outputs of electric heating coils in VEX300T" further down in the
section.
For additional information about the electric heating coil’s technical data, see the
VEX instructions Assembly and installation.
Fuse The fuse must be suitable for:
● Short-circuit protection of the VEX unit.
● Short-circuit protection of supply cable
● Overload protection of supply cable
Maximum fuse rat-
ing
VEX size With electric heating coil
HE1 or HE2* Without electric heating coil
310T C-10A C-10A
320T C-16A C-16A
330T C-25A C-16A
340T C-32A C-16A
350T C-50A C-16A
NB: *See table "Power of electric heating coils in VEX300T" further down in the
section.
For a VEX unit with short-circuit protection, the fuse rating must not be greater rat-
ing than stated in the table above.
Power cable When dimensioning the power cable, the conditions at the installation site, includ-
ing temperature, cable layout and voltage drop must be taken into consideration.
RCCB ● The unit must have protection against indirect contact.
If RCCBs are fitted in the installation, they must be of a type that meets the
following requirements:
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● PFI type A breaker in accordance with EN 61008 that breaks
the circuit on registering a vagrant current with DC content
(pulsating DC)
● The RCCBs must be marked with the following symbol:
● Disconnection time may be max. 0.3 s.
● Leak current may be max. 300 mA.
Current leakage A leak current of up to 100 mA can be generated in the VEX unit.
2.2.2 Power of electric heating coil in VEX300T
VEX
size
Electric heating coil HE1, sup-
ply air [kW]
Electric heating coil HE2, supply
air [kW]
310T 1.68 3.90
320T 3.37 7.81
330T 5.61 10.41
340T 7.49 14.96
350T 12.65 22.76
2.2.3 Electrical connection/data
With electric heat-
ing coil HE1 (supply
air) VEX size Supply voltage
(nominal)
Max. phase current [A]
Composite Aluminium
310T 3 x 400 V+N+PE ~ 50/60 Hz 6.3 -
320T 3 x 400 V+N+PE ~ 50/60 Hz 9.6 -
330T 3 x 400 V+N+PE ~ 50/60 Hz 16.0 12.8
340T 3 x 400 V+N+PE ~ 50/60 Hz 18.3
350T 3 x 400 V+N+PE ~ 50/60 Hz 30.6 30.2
With electric heat-
ing coil HE2 (supply
air) VEX size Supply voltage
(nominal)
Max. phase current [A]
Composite Aluminium
310T 3 x 400 V+N+PE ~ 50/60 Hz 9.5 -
320T 3x400V+N+PE ~ 50/60Hz 16 -
330T 3 x 400 V+N+PE ~ 50/60 Hz 22.9 19.7
340T 3 x 400 V+N+PE ~ 50/60 Hz 29.1
350T 3 x 400 V+N+PE ~ 50/60 Hz 45.2 44.8
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With HW or CW coil
(supply air)
VEX size Supply voltage
(nominal)
Max. phase current [A]
Composite Aluminium
310T 1x230V+N+PE ~ 50/60Hz 5.9 -
320T 1x230V+N+PE ~ 50/60Hz 6.7 -
330T 1x230V+N+PE ~ 50/60Hz 9.9 6.7
340T 1x230V+N+PE ~ 50/60Hz 9.5
350T 1x230V+N+PE ~ 50/60Hz 14.3 13.9
2.0A for circulation pump is included.
With DX coil (sup-
ply air), or without
integral coil (supply
air)
VEX size Supply voltage
(nominal)
Max. phase current [A]
Composite Aluminium
310T 1x230V+N+PE ~ 50/60Hz 3.9 -
320T 1x230V+N+PE ~ 50/60Hz 4.7 -
330T 1x230V+N+PE ~ 50/60Hz 7.9 4.7
340T 1x230V+N+PE ~ 50/60Hz 7.5
350T 1x230V+N+PE ~ 50/60Hz 12.3 11.9
Short-circuit cur-
rent
Maximum short-circuit current lK,max according to EN60947.2 is 10 kA
Minimum short-circuit current lK,min with control fuse, see table.
VEX size With electric heating coil HE1
or HE2 [kA]
Without electric heating coil
[kA]
310T 0.15 0.15
320T 0.24 0.24
330T 0.38 0.24
340T 0.48 0.24
350T 0.75 0.24
Accessory Accessory types MXHP/MCCW/MXCU and MCOCW module can be directly con-
nected to the VEX unit’s control system panel. Supply and modbus cable are in-
cluded in the module.
Terminals (10, 11) ... may only be used for the above-stated accessories and a maximum of one
module may be connected.
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