Exhausto VEX240HX User manual

Electrical installation guide
for VEX240HX/250HX with third-party control system
Electrical installation........................................ Chapter 1 + 2
Original instructions
3005879-2018-05-31 VEX240-250HX
EXHAUSTO A/S
Odensevej 76
DK-5550 Langeskov
Tel. [phone]
Fax [phone]
[email protected]
www.exhausto.dk

1. Voltage supply diagram
1.1. Connection diagram for VEX with motor control (MC).......................................4
1.1.1. Alarm relay function......................................................................................... 7
2. Installation of the VEX
2.1. Scope of installation..............................................................................................8
2.2. Selection of rotor direction of rotation................................................................ 8
2.3. Control of step motor............................................................................................ 9
3005879-2018-05-31
2/12

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.
Warnings The work must be performed by an authorised electrician, in ac-
cordancewith locally applicable regulations and legislation.
Isolation switch In accordance with The Machinery Directive*, an isolation switch
must be permanently installed in the unit.
The isolation switch must:
● be lockable or positioned in plain sight in the immediate vicinity of the unit
● disconnect all poles from the supply voltage
● be constructed in accordance with EN 60204-1
The isolation switch is not supplied by EXHAUSTO.
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
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.
3005879-2018-05-31
3/12

1. Voltage supply diagram
1.1 Connection diagram for VEX with motor control (MC)
VEX240 - 1 x 230 V The diagram below illustrates connection of the supply voltage to the motor con-
trol and rotor.
*) To adjust the rotor speed, see section "Control of step motor".
3005879-2018-05-31 Voltage supply diagram
4/12

VEX250 - 3 x 400 V The diagram below illustrates connection of the supply voltage to the motor con-
trol and rotor.
*) To adjust the rotor speed, see section "Control of step motor".
Explanation of dia-
grams Designation Explanation
MC1 Supply Power supply for motor control MC1 (located on left of unit)
MC2 Supply Power supply for motor control MC2 (located on right of unit)
DRHX 230V Power supply for rotor control
DRHX Rotor control signals
MC1 Power supply for motor control M1 (located on left of unit)
MC2 Power supply for motor control M2 (located on right of unit)
3005879-2018-05-31 Voltage supply diagram
5/12

Electrical data The table below shows max. phase current and max. neutral current
Type Supply voltage Max.
phase
current
(total)
[A]
Max.
neutral
current
(Rated
current)
[A]
MC1
phase
cur-
rent
A]
MC2
phase
cur-
rent
[A]
DRHX
[A]
VEX240 1 x 230V+N+PE 10 - 4.9 4.9 0.2
VEX250 3 x 400V+N+PE 8.7 12.5 8.5 8.5 0.2
NB: Power consumption is taken from two phases and is not sinusoidal. Phase L3 is
not used.
3005879-2018-05-31 Voltage supply diagram
6/12

1.1.1 Alarm relay function
Description Drawing
Connection
The diagram shows which
two terminals from MC
and RHX2M are connec-
ted to the terminal block in
the connection box
MC: terminal 9-10 and terminal 15-16
Function
The alarm relay position in
the case of power failure
or similar
The alarm relay position in
case of alarm
The alarm relay position
during operation
3005879-2018-05-31 Voltage supply diagram
7/12

2. Installation of the VEX
2.1 Scope of installation
VEX unit The electrical installation for the VEX unit comprises the following tasks:
Connection box Wiring configurations for the terminal board in the connection box:
● Supply voltage for motor controls 1 and 2
● Supply voltage for rotor control
● Rotor control signals
● Motor control signal (MC) and alarm relay
For other technical data, see the “Technical data” section in the main instructions of
the VEX.
Positioning of elec-
trical components
1
2
RD12513-02
1. Connection box 2. Rotor control
2.2 Selection of rotor direction of rotation
Left/Right The term R for Right indicates the supply air is to the right of the cooling unit, as
seen from the operating side. Supply air to the left is indicated by L for Left
3005879-2018-05-31 Installation of the VEX
8/12

Selecting Left/Right To change the VEX from, e.g., Left to Right, 2 of the 3 motor cables to the rotor
motor must be switched.
Step Action
1 Open the doors – the rotor control is located at the bottom of the
VEX.
2 Detach the DRHX rotor control door
3 Determine the fan positioning (1 or 2) of the
VEX (see the model overview in the main
VEX manual) and connect according to the
cable plan.
2.3 Control of step motor
Rotational speed/
control voltage
The diagram below shows the relationship between step motor rotational speed
and motor signal voltage.
If the rotor control step
motor receives a:
Then
0-10V signal less than 0.6 V the motor stops
0-10V signal greater than 1.1 V the motor starts
0-10V signal greater than 9.5 V the motor runs at max rpm
3005879-2018-05-31 Installation of the VEX
9/12

The table below shows the maximum permitted step motor rotational speed – de-
pendent on the size of the VEX. If the rotational speed exceeds the given value, the
motor will become overloaded and shut down.
VEX
model
Max. speed
step motor
Max. no. of
revolutions in
step motor
per min.
Optimum no. of
rotor
revolutions
per min.*
Voltage
0 - 10V
VEX240 150 70 10 8.7
VEX250 150 79 10 8.88
*When the rotor operates with this rpm, the highest temperature efficiency is ach-
ieved.
DIP-switch setting
VEX model Configuration
VEX240
on
off
VEX250
The black marking on the above sketch indicates the position of the button on the
dip-switch.
3005879-2018-05-31 Installation of the VEX
10/12

3005879-2018-05-31
11/12