Vent-Axia MX 10/10 User manual

®
MX type roof extract fan
instructions for use

®
Table of Contents
2
1. Foreword ………………………………………page 3
2. Guarantee and liability
2.1 Guarantee conditions …………………………page 3
2.2 Liability ………………………………………page 3
3. Safety
3.1 General safety regulations ……………………page 4
3.2 Pictograms used ………………………………page 4
4. Technical data
4.1 General specifications …………………………page 5
4.2 Dimensioned drawings …………………………page 6
5. Speed control
5.1 MX without speed control ………………………page 7
5.2 Speed control of one MX fan……………………page 7
5.3 Speed control of a number of MX fans …………page 7
5.4 RSC servo contact………………………………page 7
5.5 LTG temperature control ………………………page 7
6. Communication
6.1 Reading and adjustment ………………………page 8
6.2 VU Control Unit…………………………………page 8
6.3 Communication with laptop/PC …………………page 8
6.4 MX network ……………………………………page 8
7. Installation
7.1 Installation conditions …………………………page 9
7.2 Transport, storage and unpacking ………………page 9
7.3 Verification of delivery …………………………page 9
7.4 Installation ……………………………………page 9
8. Electrical connection
8.1 Controls clamp strip …………………………page 10
8.2 Wiring upon delivery …………………………page 10
8.3 Relationship between speed and
voltage at 0-10 V controls input ………………page 11
8.4 Wiring diagrams……………………………page 12-16
9. Adjustment
9.1 Summary of MX settings ………………………page 17
9.2 MX network: addressing,
settings and copying of settings ………………page 18
9.3 Control of air volume …………………………page 19
9.4 Measuring report………………………………page 20
10. Inspection and maintenance
10.1 Inspection and maintenance ……………… page 21-22
11. Malfunctions
11.1 Malfunction tables …………………………page 22-24
11.2 Replacement of components …………………page 25
11.3 Logbook ………………………………………page 26
12. EC declaration of conformity …………………page 27

This installation manual contains instructions for the installation and
maintenance of the MX roof extract fan. This manual applies to the
following types:
MX 10/10
MX 20/20
MX 30/10
MX 30/20
Read this manual carefully before commencing installation
or maintenance of the fan.
This manual contains information required for safe and
optimal installation of the MX roof extract fan. It is also
intended as a reference for service and maintenance work,
in order that this can be carried out in a sound manner.
2.1 Guarantee conditions
Applicable only to products installed and used in the United
Kingdom. For details of guarantee outside the United Kingdom
contact your local supplier.
Vent-Axia guarantees its products for two years from the date of
purchase against faulty material or workmanship. In the event of any
part being found to be defective, the product will be repaired, or at
the Company's option replaced, without charge, provided that the
product:
1) has been installed and used in accordance with the instructions
given wfth each unit.
2) has not been connected to an unsuitable electricity supply. (The
correct electricity supply voltage is shown on the product rating
label attached to the unit.)
3) has not been subjected to misuse, neglect or damage.
4) has not been modified or repaired by any person not authorised
by the company.
IF CLAIMING UNDER TERMS OF GUARANTEE
please return the complete product, carriage paid to your original
supplier or nearest Vent-Axia Centre, by carrier or personal visit.
Please ensure that it is adequalely packed and accompanied by a
letter clearly marked 'Guarantee Claim' stating the nature of the fault
and providing evidence of date and source of purchase.
The guarantee is offered to you as an extra benefit, and does not affect
your legal rights.
2.2 Liability
The MX has been designed for extraction of (polluted) air, which is
diagonally exhausted. Any other application is seen as ‘inappropriate
use’ and can result in damage to the MX or personal injury, for which
the manufacturer cannot be held liable.
Work to be carried out on the fan may only be carried out
by a qualified mechanical electrical engineer.
The manufacturer is not responsible for any damage derived from:
• non compliance with the safety, operating and maintenance
instructions in this guide;
• the use of components not supplied by the manufacturer;
• normal wear and tear.
Safety
It is important that you heed the safety instructions given below, for
sensible use of the MX roof extract fan but also for your own safety
and that of other people.
®
1. Foreword / 2. Guarantee and liability
3

®
3. Safety
3.1 General safety regulations
• Always comply with the safety regulations and instructions given
in this manual.
• Make sure that (parts of) the fan not (yet) anchored and tools
cannot fall off the roof and cause damage or personal injury.
• When the fan is completely or partly dismantled, make sure
nobody can touch rotating or live parts.
• Do not leave a (partly) dismantled fan which is connected to the
power supply, unattended.
• Make sure that parts which conduct electricity do not become
wet.
• The fan must be fitted in such a manner that there is no risk of
anybody touching the side of the fan which does not have a
protective screen (see EN 294).
3.2 Pictograms used
The following pictograms may be used in the manual.
Point of attention
4

®
4. Technical data
5
400
350
300
250
200
150
100
50
0
0 500 1000 1500 2000
1800
1600
1400
1200
1000
800
600
400
max. power cons.
max. sound pressure level
m3/h
∆Pst
Pa (N/m2)
= MX
Current Power Noise level
Speed consumption consumption deliv suctionsuction*cos.
rpm A Wel dB(A) dB(A) dB(A) ϕ
1800 0,76 174 57 72 63 0,99
1600 0,55 125 54 70 61 0,99
1400 0,39 87 50 66 58 0,99
1200 0,26 60 46 63 55 0,99
1000 0,17 39 41 58 51 0,99
800 0,12 27 36 56 49 0,98
600 0,09 19 30 49 42 0,92
400 0,07 12 24 41 35 0,75
500
400
300
200
100
0
0 400 800 1200 1600
1600
1400
1200
1000
800
600
400
max. power cons.
max. sound pressure level
2000 2400 2800 3200 3600 m3/h
∆Pst
Pa (N/m2)
= MX
Current Power Noise level
Speed consumption consumption deliv suctionsuction*cos.
rpm A Wel dB(A) dB(A) dB(A) ϕ
1600 1,80 409 62 77 64 0,99
1400 1,16 266 58 74 62 0,99
1200 0,73 169 53 69 57 0,99
1000 0,44 100 48 65 54 0,99
800 0,25 57 42 59 49 0,99
600 0,14 31 36 55 45 0,96
400 0,09 17 28 48 39 0,82
MX 10/10
MX 20/10
0 500 1000 1500 2000 2500 3000 3500 4000
50
0
150
200
250
300
1000
900
700
500
m3/h
∆Pst
Pa (N/m2)
max. power cons.
max sound pressure level
800
600
100
400
= MX
Current Power Noise level
Speed consumption consumption deliv suctionsuction*cos.
rpm A Wel dB(A) dB(A) dB(A) ϕ
1000 1,30 297 56 71 61 0,99
900 0,92 217 52 68 57 0,99
800 0,64 148 49 65 56 0,99
700 0,44 103 46 62 53 0,99
600 0,29 67 42 60 50 0,99
500 0,19 44 37 55 46 0,99
400 0,13 28 33 52 43 0,94
MX 30/10
600
500
400
300
200
100
0
0 1000 2000 5000
1400
1200
1000
800
600
400
m3/h
∆Pst
Pa (N/m2)
= MX
max. power cons.
max. sound pressure level
3000 4000
Current Power Noise level
Speed consumption consumption deliv suctionsuction*cos.
rpm A Wel dB(A) dB(A) dB(A) ϕ
1400 3,34 761 64 78 67 0,99
1200 2,03 462 61 75 64 0,99
1000 1,18 269 57 71 60 0,99
800 0,65 147 51 66 55 0,98
600 0,32 72 44 60 49 0,98
400 0,12 28 36 51 41 0,98
MX 30/20

®
4. Technical data
4.2 Dimensioned drawings
6
øD
F
E
H
B
G
ø10(4x)
A (inw.)
type type
of fan of acc* A B D E F G H
MX 10 330 460 330 575 60 473 44 196
MX 20 450 580 450 708 60 540 48 241
MX 30 535 665 535 863 60 601 64 302
* The coding indicates the gauge of the fastening holes.

®
5. Speed control
7
Various regulators can be fitted in order to regulate the speed. A
distinction is made between regulation of one fan or regulation of a
number of fans at the same time.
5.1 MX without speed control
When the MX is delivered, it operates at the maximum set speed
when connected to the power supply. This capacity is given on the
label on the top of the controls. Remove the LUS3 from the clamp
strip of the controls (see chapter 8.2) and the MX will operate at the
minimum speed. In order to operate the fan at a different speed, this
speed must be set using the Control Unit VU (see chapter 6.1).
5.2 Speed control of one MX fan
The following regulators are available for speed control of one MX
fan.
SAG 0-M
Rotating switch for continuous adjustment of the speed. (see diagram
2 page 13 & SAG 0-M leaflet)
SAG 0-5
Rotating switch for adjustment of the speed in five positions. (see
diagram 2 page 13 & SAG 0-5 leaflet)
SAG 0-2
Rotating switch for adjustment of the speed in two positions. (see
diagram 2 page 13 & SAG 0-2 leaflet)
5.3 Speed control of a number of MX fans
The following regulators are available for speed control of a number
of MX fans.
VG 31
Power supply unit for the parallel control of maximum 31 MX fans.
The unit is fed with 230 V AC voltage. Depending on the speed
regulation required, the power supply unit is connected to the SAG 0
- M, SAG 0-5 or SAG 0-2.
DNG 31
Unit for day/night switching of maximum 31 MX fans. The switching
times are set with a timer. A central switch can be used to
simultaneously switch all connected fans on and off. The unit is fed
with 230 V AC voltage. The DNG 31 can also be used for day/night
switching of MX-ZMV.
5.4 RSC servo contact
The servo contact can be used for the parallel switching of another
system component, a valve for example. The servo contact is supplied
in a separate housing which can be fitted under the cover of the MX,
for example.
5.5 LTG temperature control
The LTG is a temperature regulator with which the MX speed can be
continuously adjusted, depending on the temperature. The
temperature is measured using the supplied temperature gauge. The
temperature is set between 20°C and 50°C using a rotation knob on
the housing. Rotation of a potentio-meter in the housing adjusts the
bandwidth between 0.5°C and 10°C. The speed of the MX varies
between the minimum and maximum of the set bandwidth.
The LTG can also be used in combination with the VG31.
One LTG can be used to control a number of fans.
cooling or heating
There is a choice between ‘cooling’ or ‘heating’.
- For cooling, the MX will be speeded up when the temperature
increases. A rotation knob on the LTG housing is used to set the
temperature, whereby the MX operates at the minimum speed.
The MX is speeded up as the temperature rises. The maximum
speed is reached at the set temperature + bandwidth.
- For heating, the MX will be slowed when the temperature
increases. The rotation knob on the LTG housing is used to set
the temperature, whereby the MX operates at minimum speed.
The MX is speeded up as the temperature drops. The maximum
speed is reached at the set temperature - bandwidth.
The cooling or heating function can be set using a number of jumpers
within the housing. The LTG also includes a jumper which can be
used to select that the fan is switched off when it reaches the set
temperature.

®
6. Communication
For example
The jumpers in the housing are set to ‘cooling’. Temperature set at
25°C, bandwidth at 4°C. MX fan capacity set at: minimum 40%,
maximum 80%.
At 25°C, the fan works at 40%, at 25 + 4 = 29°C, the fan works at the
maximum capacity.
6.1 Reading and adjustment
Each MX is fitted with a connection for the Control Unit VU or a
laptop/PC. This connection can be found under the MX cover.
Various units can be adjusted and read via this connection, such as:
• type of fan and controls;
• required capacity and limitations of minimum and maximum
capacity;
• current speed;
• address and group number (for application of MX in a network);
• malfunctions.
6.2 VU Control Unit
The VU Control Unit allows for direct communication with the MX.
Method of operation
The plug of the unit is inserted into the MX connection. Once the
Control Unit has been switched on, the current data of the MX is
shown on the display of the unit. These settings can be changed.
Consider the following applications, for example:
• adjustment on site or subsequent re-adjustment of the capacity of
the MX;
• setting an address (MX in network).
The unit is supplied in a case with a user’s manual. Also included
with the unit is a charging unit for charging in a car (12V) or via a
wall socket (230V).
6.3 Communication with laptop/PC
The VENT-AXIA Maintenance Software can be used for direct
communication between the laptop/PC and MX. An interface is used
for connection of the MX to the laptop/PC.
The possibilities for adjustment and reading are virtually the same as
those for the VU Control Unit.
The main difference is that, when communicating with a laptop/PC,
the MX settings can be saved as a file. For a list of the options, refer
to the ‘VENT-AXIA Maintenance - Software – Networks –
Communication Manual’, available from VENT-AXIA.
6.4 MX network
A network of fans can be built, via inter-connection of a number of
MX fans using the communication connection. The serial connection
of each fan is double, in order to interconnect them. Each fan in the
network is programmed with its own address, via the lap-top/PC or
the Control Unit.
Besides the direct connection between the lap-top/PC or the Control
Unit with the network, reading and adjustment can also take place
remotely. From the lap-top/PC, a modem can be used to
communicate with an MX network at a different location.
The MX network at location must be connected to the telephone net
via a modem or other equipment, for this purpose. For more
information, refer to the ‘VENT-AXIA Maintenance – Software –
Networks – Communication Manual’, available from VENT-AXIA.
8

7.1 Installation conditions
• The MX must be installed according to the general and locally
applicable safety and installation regulations.
• The MX must be fitted in such a manner that there is no risk of
anybody touching the suction side of the fan (see EN 294).
• The permissible temperature of the air to be moved is from -30°C
to +80°C.
• The fan is designed for continuous operation and must not be
switched on and off more frequently than once every five minutes.
7.2 Transport, storage and unpacking
• The MX must be transported horizontally.
• During storage, the MX must be positioned horizontally.
• The fan should preferably be lifted using the recesses in the side
of the housing or on the base.
• Ensure that the packaging materials are disposed of in an
environmentally responsible manner.
7.3 Checking the delivery
• The type indication and other fan rating plate information must
match that on the order.
• The box contains the manual and a bag with mounting bolts and
rings, intended for attaching the MX to a mounting curb.
7.4 Installation
General
• It is vital that the roof construction or foundation on which the MX
is to be installed is sufficiently rigid. If it is not rigid enough,
undesirable vibrations may occur during operation of the fan.
• The fan must be installed using the supplied bolts and rings.
Ensure that both the foundation and the surface into which the
bolts are screwed are sufficiently strong to retain the fan even
under severe weather conditions.
• The fan must be mounted horizontally to avoid rain and wind
blowing into the fan. The maximum permissible angle of
installation is 5° to the horizontal.
• Ensure that the four corners of the fan mounting base are level.
An unlevel mounting base may result in uneven stress on the fan
construction.
• The power supply cable, any control cables and possibly a
pressure hose can be fed through a tube leading from under the
base of the fan to under the hood. This tube is indicated under the
hood as ‘supply cable’, see illustration 7.1. A tube to one of the
recesses in the corners of the ventilators can be used to feed
cables to the operating switch. This is indicated by ‘cable’, see
illustration 7.1.
®
7. Installation
9
cable
supply cable
ill. 7.1

®
8. Electrical connection
8.1 Controls connection strip
The connection strip of the controls is shown below.
• 0 –10 V controls input: for regulation of the speed of the MX
using low voltage switches.
• Release contact: the current at this contact must be 10- 250 volt
(AC or DC). When there is no current at the release contact, the
fan will not work, even if there is 230 V power supply.
• Malfunction contacts: There is a make and break contact. In case
of a malfunction, the contact between the two KL3A connectors is
closed and between the two KL3B connectors is opened. The
reverse situation occurs when there is ‘no malfunction’.
• Communication connection: for adjustment and reading of the
MX using the VU Control Unit or the laptop/PC. The contact is
double: one A/B connection is connected to a sub-D9 connector
in the frame, one A/B connector is free and can be used for
looping when the MX is included in a network.
8.2 Wiring upon delivery
The MX standard
There are three links on the controls connection strip. One or more
links may need to be removed in order to connect up control
equipment. Refer to the applicable diagrams in chapter 8.4.
• LUS1 is used to connect the +10V to the first connector of the
release contact.
• LUS2 is used to connect the GND to the second connector of the
release contact.
• LUS3 is used to connect the +10V to the Esoll of the 0-10V
controls input.
LUS1 and LUS2 provide current for the release contact. Via LUS3,
there is 10V on the Esoll of the 0-10 controls input. The fan will
therefore operate at maximum capacity following connection.
10
PE 1
18 V Eist GND
U3 10 V Esoll GND
U3
RS
ARS
BRS ARS BGND U3
An
LN
ÖG
S G EN EN
sensor connection
0-10 V controls input
KL2B
KL2A
Failure contact
break
PC/Control Unit connection release contact
2nd PC/Control Unit
connection
+15V
U4 +15V
U4 TW
PTC GND
U4 GND
U4
H1 H2 H3 UVW
Motor
KL3B
KL3A KL4
KL5A
KL5B KL6
PE2
Power supply
230V, 50Hz
Failure contact
make
PE 1
18 V Eist GND
U3 10 V Esoll GND
U3
RS
ARS
BRS ARS BGND U3
An
LN
ÖG
S G EN EN
KL2B
KL2A
PC/Control Unit connection
To WS
KL3B
KL3A KL4
lus 2
lus 1
lus 3

®
8.3 Relationship between speed and current at 0-10V controls
input
When connecting regulators, the speed of the MX is controlled by
varying the voltage at the 0-10 V controls input.
Measurement of the voltage between Esoll and GND connectors of the
0-10V controls input allows for the speed of the fan to be derived
from one of the graphs given below. The current between Esoll and
GND can be measured both on the MX (two connectors of the 0-10 V
controls input) and the switch/regulator connected.
These graphs apply only if the minimum and maximum
capacity setting has not been changed.
The minimum and maximum capacity can be adjusted using the VU
Control Unit or the laptop/PC. This means that the graphics of the fan
change.
Example
Min. Capacity 50% and Max. Capacity 70% means 50% at 0 V and
70% at 10 V at the 0-10V controls input.
Adjustment example
If you wish to adjust an MX 20/10 to two speeds using the SAG 0-2:
750 rpm and 1000 rpm, follow the example below.
• Turn the switch to position ‘1’.
• Rotate the n1 potentio-meter until the voltage between the GND
and Esoll connectors is 3.8 V. This corresponds with 750 rpm, see
the characteristic of the MX 20/10 below.
• Now turn the switch to position ‘2’. Now rotate the n2 potentio-
meter until 5.5 V is given, which corresponds with 1000 rpm.
.
11
Speed (rpm)
2000
1500
1000
500
00246810
Esoll - GND (V)
Speed (rpm)
2000
1500
1000
500
00246810
Esoll - GND (V)
Speed (rpm)
2000
1500
1000
500
00246810
Esoll - GND (V)
Capacity (%)
0
30
50
75
100
Capacity (%)
0
25
50
75
100
Capacity (%)
0
25
50
75
100
Speed (rpm)
2000
1500
1000
500
00246810
Esoll - GND (V)
Capacity (%)
0
25
50
75
100
SAG 0-2
n2
n1
+ 10V
EN Esoll GND
Speed (rpm)
2000
1500
1000
500
00246810
Esoll - GND (V)
Capacity (%)
0
25
50
75
100
V
3.8 5.5
010
50%
Capacity [%]
70%
2468
0
Esoll - GND (V)

®
8. Electrical connection
12
The fan is connected in accordance with the applicable diagram.
A number of diagrams may be simultaneously applicable.
The fan is class 1 and must be earthed
8.4 Wiring diagrams
MX (standard) wiring diagram
diagram 1
PE1 KL 2B KL 3B Motor connection
KL 4
KL 2A KL 3a
KL 1
LNRS
ARS
BRS
ARS
BAn GND U3
ÖG
SG EN
EN
orange
brown
red yellow
black
blue
black blue brown
green / yellow green / yellow
brown white
LN
WS
12
4
3
54321
9876
161 2
21 12
6
12
1
18 V Eist GND
U3 10 V Esoll GND
U3

®
13
SAG 0-2 / SAG 0-5 / SAG 0-M wiring diagram
diagram 2
VG 31 wiring diagram
diagram 3
remove these links
PE1 KL 2B KL 3B
KL 4
KL 2A KL 3a
KL 1
LNRS
ARS
BRS
ARS
BAn GND U3
ÖG
SG EN
EN
161 2
21 12
6
12
1
18 V Eist GND
U3 10 V Esoll GND
U3
Motor connection
+10V
EN Esoll GND
PE1 KL 2B KL 3B
KL 4
KL 2A KL 3a
KL 1
LN RS
ARS BRS ARS BAn GND U3
ÖG
SG EN
EN
161 2
21 12
6
12
1
18 V Eist GND
U3 10 V Esoll GND U3
Motor connection
10 v
GND
GND
EN
EN
Esoll
Esoll
VG 31
L
N
203 V
50 Hz
GND
EN
+ 10 V
Esoll
Switches SAG 0-2
SAG 0-5
SAG 0-M
+10V
EN Esoll GND
3 x 0.75 mm2
Max. 31 MXs
remove these links.
Use VG 31 in combination with switch SAG

®
8. Electrical connection
14
DNG 31 wiring diagram
diagram 4
RSC wiring diagram
diagram 5
R1 = speed setting potentio-meter = 1
R2 = speed setting potentio-meter = 2
3 X 0,75 mm2
DNG 31
P 1 P 2 remove these links.
PE 1 KL 2B KL 3B Motor connection
KL 4
KL 3A
KL 2A
KL 1
18 V Eist GND
U3 10 V Esoll GND U3 ÖG
G
SEN EN
LNRS
A
RS
B
RS
A
RS
BAn GND
U3
1612
121 612
12
Max. 31 MXs
10 V
GND
GND
EN
EN
E
E
soll
soll
230 V 50 Hz
LN
PE1 KL 2B KL 3B
KL 4
KL 2A KL 3A
KL 1
LNRS
ARS BRS ARS BAn GND U3
ÖG
SG EN
EN
161 2
21 12
6
12
1
18 V Eist GND
U3 10 V Esoll GND U3
Motor connection
RSC
KL 4-2
KL 4-1
KL 6
KL 2
KL 4-1
KL 4-2
KL 6
250 V/8 A
KL 2
Use RSC contact to switch servo
motor as soon as the fan is switched on..
RSC
LN
Servo motor
M
1
3
5
2 4 6
WS

®
15
LTG wiring diagram
diagram 6
Wiring diagram for linking of MX malfunction contacts (potential-free)
4 x 0,75 mm2
remove these links
Jumpers (removable link) in 4 positions shown below
- heating: to JP2, JP4, JP7
- cooling: to JP3, JP5, JP7
- upon reaching the set temperature,
the fans must switch on: JP1 to ‘uit’
- upon reaching the set temperature, the fans
must continue rotation at minimum speed:
JP1 to ‘minimum’
external sensor
Cooling Heating
temperature setting 20°C
band width 5°C
temperature setting 20°C
band width 5°C
R=upper temperature setting potentio-meter
R7=band width setting potentio-meter
Motor connection
PE1 KL2B KL3B
KL1 KL2A KL3A
lN RS
A
RS
B
RS
A
RS
BAn GND U3
18V Eist
GND
U3 10V Esoll GND U3 ÖG
SG EN EN
16
1612 12
21
12
TP3TP1
TP2
JP3 JP2 JP5 JP4 JP6 JP7
5
10
7,5
2,5
0,5
minimum uit
JP1 U2
EN SENS +18V
Esoll
Esoll (V)
(max.cap.) 10
(min.cap.) 0 20 °C25 °C
Esoll (V)
(max.cap.) 10
(min.cap.) 0 15 °C 20 °C
braun
weiß
KL4
OG
SG
OG
SG
OG
SG
OG
SG
123
this link is closed if there is no MX failure and if all MXs are rotating
MX is switched off
or fails
MX is in operation
0S
G
0S
G
12
12
12
12
12
12
12
12

®
8. Electrical connection
16
diagram 7
Wiring diagram for MX in network
diagram 8
Wiring diagram for MX in network with modem communication
diagram 9
options: A – communication via telephone/modem (9 pins - 25 pins)
B – communication with PC (9 pins -9 pins)
twisted pair
maximum 31 MXs
12331
GROUND AB
RS
ARS
BRS
ARS
BGND
U3 RS
ARS
BRS
ARS
BGND
U3 RS
ARS
BRS
ARS
BGND
U3 RS
ARS
BRS
ARS
BGND
U3
Shielding R=120 Ohm
options: A – communication via telephone/modem (9 pins - 25 pins)
B – communication via PC (9 pins - 9 pins)
twisted pair
maximum 31 MXs
12331
GRD AB
RS
ARS
BRS
ARS
BGND
U3 RS
ARS
BRS
ARS
BGND
U3 RS
ARS
BRS
ARS
BGND
U3 RS
ARS
BRS
ARS
BGND
U3
Shielding R=120 Ohm
MI 31
RS485
NO NC COM NO NC COM NL
supply
RY2
RY 1
SUB D9 - female
B
A
com-poort
PC
modem
"Hayes compatible"
to telephone line

9.1 Summary of MX settings
Adjust the MX settings and any control equipment according to the applicable column. The MX is pre-set to the given values. Do not change
these values unless absolutely necessary. At [...] fill in the value set by you.
Standard: DNG 31 SAG 0 – 2 SAG 0 – M LTG
SAG 0 – 5
Wiring diagram 1 1 + 5 1 + 3 of 4 1 + 3 or 4 2 + 5
Possibly also diagram: 6-8-9-10 6-8-9-10 6-8-9-10 6-8-9-10 6-8-9-10
In MX (with VU)
Mode Control Control Control Control External
Set point Ana 0..10V Ana 0..10V Ana 0..10V Ana 0..10V Dig 0/10
Sensor None None None None 0-300
Regulation Positive Positive Positive Positive Positive
Address * 1 or [……] 1 or [……] 1 or [……] 1 or [……] 1 or [……]
Group * 1 or [……] 1 or [……] 1 or [……] 1 or [……] 1 or [……]
Minimum capacity 15 % ** 15 % ** 15 % ** 15 % ** 15 % **
Maximum capacity 100 % 100 % 100 % 100 % 100 %
or [……] %
Set point digital (0) - - - - Low
Set point digital (1) - - - - High,
Set point RS-485 - ----
Write / reset Write/ Write/ Write/ Write/ Write/
Reset Reset Reset Reset Reset
For similar For similar For similar For similar For similar
Save / set * setting in setting in setting in setting in setting in
other MX other MX other MX other MX other MX
In SAG
Speed n1 [……] V
Speed n2 [……] V
Maximum speed [……] V
In LTG
Potentio-meter (bandwidth) [……] °C
see manuel
Jumper (removable link) LTG
[……]
In VG 31 ---
In DNG 31 Times
Time switch high[……] high[……]
low [……]
Switch To To
Low (R1) [……] V Potentio-meter
High (R2) [……] V Potentio-meter
RSC - ---
- No adjustment necessary.
* If the fan is part of a network, follow the instructions on page 18.
** The minimum capacity of the MX 30/10 has not been factory set at 15% but rather at 30%.
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9. Adjustment
17

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9. Adjustment
18
9.2 MX network: addressing, settings and copying of settings
If more than one MX is connected (see diagrams 8 + 9), each MX
must have its own address.
Addressing
1. Make a (roof) summary of all fans, divide the fans into groups of
a maximum of 31 and note an address number and group
number by each fan.
2. Use the operating switch to turn off all the fans connected in this
network.
3. Connect the VU to the first MX.
4. Turn this fan on only.
5. Enter the correct address in the ‘Settings’ menu under ‘Address’.
6. Enter the correct group number in the ‘Settings’ menu under
‘Group’.
7. Possibly also note the address in the table on page 17 of the
manual for this fan.
8. Select ‘Write/reset’ ‘Write/reset’ in the ‘Settings’ menu.
9. Now turn this fan off again.
10. Connect the VU to the next MX.
11. Repeat points 4 to 10 for each MX of this network.
12. Turn all the fans back on.
Settings
13. Connect the VU to a random MX.
14. Press the ‘Menu’ key (‘Main menu’ will appear).
15. Choose the correct group under ‘MX Group no.’ in the ‘Main
menu’.
16. Choose the correct address under ‘MX network’ in the ‘Main
menu’.
17. Set the MX in the ‘Settings’ menu, according to the table on page
17.
18. Note the new setting in the table on page 17 of the manual for
this fan.
More than one MX of the same type and with the same
setting.
19. Select ‘Save/set’ then ‘Save’ in the ‘Settings’ menu.
20. Possibly choose the next group under ‘MX Group no.’ in the
‘Main menu’.
21. Choose the next address under ‘MX network’ in the ‘Main menu’.
22. Select ‘Save/set’ then ‘Set’ in the ‘Settings’ menu.
23. Select ‘Write/reset’ ‘Write/reset’ in the ‘Settings’ menu.

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19
9. Adjustment
9.3 Control of air volume
The air volume is determined by the speed of the impeller and the
external resistance in the mounting curb, see the graph on page 5.
The speed can be determined by:
• measuring with the aid of a stroboscope;
• reading the speed with the VU Control Unit in the ‘Status’ menu
under ‘Speed’.
• measuring the voltage on the ‘Esoll’ and ‘GND U3’ connector and
plotting these measured values in the applicable graph on page
14. These graphs only apply if the MX has been set at minimum
speed 15%* and maximum speed 100% (this is the standard
factory setting). If these settings are different, the applicable
graph must be adjusted accordingly.
* The minimum capacity of the MX 30/20 has been factory set at
25%.
Example
Measured voltage 5.5 V
Speed is 1000 rpm
Minimum capacity setting 40%
Maximum capacity setting 80%
Measured voltage 8.7 V
Speed is 1200 rpm
The external resistance can be determined by:
• measuring the external resistance in the mounting curb;
The air volume can now be determined.
• Now plot the speed line found in the graph on page 5.
• Now draw a line from the external resistance found to the right.
• Draw a line vertically from the intersecting point found and
determine the air volume.
Example
Speed 1200 rpm
External resistance 120 Pa
Air volume is 1900 m3/h
Conclusions
More air than the design value means that the resistance in the
system is lower than the design value.
Possible causes are:
• lower duct resistance than assumed;
• valves or grilles have not be fitted or adjusted (open too far);
• leakage in the duct system. Compare the air volume with the total
measured air volume through the valves.
Less air than the design value means that the resistance in the system
is higher than the design value.
Possible causes are:
• higher duct resistance than assumed;
• valves or grille not adjusted (too far closed);
• blockage in the duct system. Compare the air volume with the
total measured air volume through the valves.
Speed (rpm)
2000
1500
1000
500
00246810
Esoll - GND (V)
Capacity (%)
0
25
50
75
100
Speed (rpm)
2000
1500
1000
500
00246810
Esoll - GND (V)
Capacity (%)
0
25
50
75
100
80
40
500
400
300
200
100
0
0 400 800 1200 1600
1600
1400
1200
1000
800
600
400
max. power cons.
max. sound pressure level
2000 2400 2800 3200 3600 m3/h
∆Pst
Pa (N/m2)
= MX
= MX + GD

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9. Adjustment
20
9.5 Measuring report
Type of fan
Group / address / Set point / /
Pressure set at ....... Pa
Net:
Room: Kitchen Kitchen Bathroom Toilet …… ……
Type of valve or
extractor hood:
Required air delivery high:
in l/s or m3/h*
A
Q
A
Q
A
Q
A
Q
A
Q
A
Q
A
Q
A
Q
A
Q
A
Q
A
Q
A
Q
A = Setting of the valve or extractor hood Q = Air volume in l/s or m3/h*
* Delete that which is not applicable.
LEVEL