MAXX ® Vent VN
OPERATION MANUAL
FläktGroup product range MAXX Vent VN
2FläktGroup DC-2011-0148-GB 2022-09/R5 • Subject to modification
FläktGroup product range
MAXX Vent VN
FläktGroup DC-2011-0148-GB 2022-09/R5 • Subject to modification 3
Unit type code
MAXX Vent Control system Accessories
V N 1 K . U 1 1 K O Z . A K A I 2 0 0 1 G A Z H 1 . 3 2 0 1
Model size
1 = Model size 1
2 = Model size 2
3 = Model size 3
4 = Model size 4
5 = Model size 5
Heat exchanger
K = Without heat ex-
changer
Air flow function
U = Recirculating air unit
M = Mixed air unit
Contact protection grille
1 = On outlet
2 = Without contact-protection
grille
Thermostat
1 = With thermostat
2 = Without thermostat
Medium type
K = Without heat exchanger
Heat exchanger connection
O = Without screw thread connection
Outlet
A = Outlet nozzle, ceiling
B = Basic outlet, wall
C = Secondary air louvre, ceiling, manually adjustable
D = Secondary air louvre, ceiling, actuator, 230V, on/off
L = Deflection louvre, ceiling/wall
K = Without outlet (flange)
P =
Profile, ceiling/wall
T = Gate nozzle
U = Secondary air louvre, wall installation, manual ad-
justment
V = Four sides, ceiling
W = Secondary air louvre, wall, actuator, 230V, on/off
Z = Basic outlet, ceiling, two sides
O = Without outlet*
Air-intake modules
20 = Mixed air module, type 1
21 = Mixed air module, type 2
23 = Outside air blocking damper
25 = Flexible connector
26 = Rectangular duct 150
27 = Rectangular duct 1000
28 = Duct connecting bend 90°, symmetrical
29 = Duct connecting bend 90°, asymmetrical
31 = Wall air-intake hood
32 = External weather grille
33 = End grille for accessories
34 = Duct through slanted roof
35 = Roof air-intake hood
36 = Bag filter module
37 = Mat filter module
38 = Spare bag filter for “35”
39 = Spare bag filter for “36”
40 = Spare filter fleece for “37”
49 = Roof duct with flat roof-duct base
51 = Frame for wall connection
52 = Flange
Without outlet
Motor / Speeds
AC motor
A =
3x400V 2-speed - low speed range - wide-blade fan 5)
B =
3x400V 2-speed - high speed range - wide-blade fan 5)
C =
3x400V 3-speed - low speed range - wide-blade fan 3)
D =
1x230V low speed range - wide-blade fan 4)
E =
1x230V high speed range - wide-blade fan 5)
R =
3x400V 2-speed - high speed range - sickle-blade fan 2)
S =
3x400V 3-speed - sickle-blade fan
V =
3x500V 3-speed - sickle-blade fan
EC motor
Y =
1x230V continuously variable EC - sickle-blade fan
Z =
3x400V continuously variable EC - sickle-blade fan 2)
Electrical equipment
K = Terminal box
S = Fan isolator
R = MATRIX
Design
A =
Design heat exchanger casing, metal sheet in RAL 9002, corners in
RAL 7000
B = Design heat exchanger casing and outlet in selectable RAL
D =
Industrial heat exchanger casing, metal sheet in RAL 7000
Model size
1 = Model size 1
2 = Model size 2
3 = Model size 3
4 = Model size 4
5 = Model size 5
Material/Design
0 = Metal sheet / Standard version
Regulation of mixed air modules and outlet
0 = Actuator on site
1 = Manual adjustment
2 = Actuator 230V, on/off
3 =
Actuator 230V, on/off + potentiometer
4 =
Actuator 230V, on/off + final position switch
5 = Actuator 230V+ spring return
6 =
Actuator 24V, on/off
7 =
Actuator 24V (0... 10V)
Filter class/electrical equipment, if required
0 = without
2 = G2/without differential pressure switch
3 = G3/without differential pressure switch**
4 = G4/without differential pressure switch
5 = G2/with differential pressure switch
6 = G3/without differential pressure switch**
7 = G4/with differential pressure switch
Additional modules and suspensions
53 = Compact C
54 = Studio wall
55 = Modular (for wall mounting)
56 = Ceiling suspension
Model 55 Modular suspension with types
0 = Without accesso-
ries
7 = 25+23+51
1 = 25+20+51 8 = 25+36+23+51
2 = 25+36+20+51 9 = 25+37+23+51
3 = 25+37+20+51 A = 26+36
4 = 25+21+29+51 B = 26+37
5 = 25+36+21+29+51 C = 25+28 (+49...)
6 = 25+37+21+29+51 W = Without accessories for
units with vertical outlet
Design 56 for ceiling suspension
0 = without threaded rod
1 = without threaded rod 1 m
2 = without threaded rod 2 m
3 = without threaded rod 3 m
Controller type
2 = MATRIX 2000
3 = MATRIX 3000
4 = MATRIX 4000
Controls package No. 001-
999
Control panel
IP54; with sensor 903454
G = MATRIX OP21I
I = MATRIX OP31I
K = MATRIX OP44I
L = MATRIX OP50I
M = MATRIX OP51I
Z = Without control panel
Unit type
Master unit
A = Control panel enclosed
C = Without control panel
Slave unit
D = Without control panel
* Only possible with heat exchanger casing D
** G3 only possible as mat filter
2) not for sizes 1 and 2
3) not for sizes 1 and 5
4) not for sizes 3, 4, and 5
5) not for size 5
Unit type
U = Recirculating air
M = Mixed air
MC 4 M 3AC ZKF
or
Electric motor type
AC motor
1AC =
1-speed, 230V, 50Hz
2AC = 2-speed, 400V, 50Hz
3AC = 3-speed, 400V, 50Hz
EC motor
1EC =
continuously variable,
230V, 50Hz
3EC = continuously variable,
400V, 50Hz
Additional functions - Control unit
Recirculating air
000 = Without additional functions
Z00 =
Secondary air louvre – Actuator
230V, on/off
00F =
LED display of filter contamination
Z0F =
Secondary air louvre – Actuator
230V, on/off and LED display of filter
contamination
Mixed air (not for 1AC)
0KF = Mixed air box control (of mixed air
damper) – Actuator 230V, on/off or
Actuator with spring return 230V
and Signalling of filter contamina-
tion
ZKF
= Secondary air louvre control – Ac-
tuator 230V, on/off, Mixed air box
control (of mixed air damper), Actu-
ator 230V, on/off or Actuator with
spring return 230V and Signalling
of filter contamination
Contents MAXX Vent VN
4FläktGroup DC-2011-0148-GB 2022-09/R5 • Subject to modification
Contents
FläktGroup product range ............................................................. 2
Unit type code ................................................................................. 3
1 Safety and user instructions ......................................................... 7
1.1 Scope of the operation manual ...................................................................... 7
1.2 Symbols used ................................................................................................ 7
1.3 Safety-conscious work procedures ................................................................ 9
1.4 Proper use ..................................................................................................... 9
1.5 Safety regulations and codes......................................................................... 9
1.6 Modifications and changes .......................................................................... 10
1.7 Spare parts .................................................................................................. 10
1.8 Selection and qualification of personnel....................................................... 10
2 Technical description................................................................... 11
2.1 Unit configuration and packaged content..................................................... 11
2.2 Material specification.................................................................................... 11
2.3 Unit variants ................................................................................................. 12
2.4 Unit configuration ......................................................................................... 12
2.5 Unit dimensions ........................................................................................... 13
2.6 Unit weight ................................................................................................... 13
2.7 Operating limits ............................................................................................ 14
2.8 Sound and electric data ............................................................................... 14
3 Shipping and storage ................................................................... 16
3.1 Shipping ....................................................................................................... 16
3.2 Shipping and handling of the unit................................................................. 16
3.3 Storage ........................................................................................................ 17
4 Assembly....................................................................................... 18
4.1 Load-bearing capacity of the installation site ............................................... 18
4.2 Ceiling mounting .......................................................................................... 18
4.3 Wall mounting .............................................................................................. 19
4.4 Unit installation............................................................................................. 21
4.5 Mounting unit casing .................................................................................... 21
5 Electrical connection.................................................................... 24
5.1 Connection diagrams ................................................................................... 24
5.1.1 Cable connections ........................................................................... 24
5.1.2 Motor protection using thermal contact............................................ 25
5.1.3 Operation of basic unit..................................................................... 25
5.2 Terminal box or electric switch cabinet ........................................................ 25
5.3 Motor terminal diagram for 3-speed three-phase external rotor motor
3 x 400V (3 x 500V), 50Hz (motor type C, S, V) .......................................... 26
5.3.1 3-speed operation at operating voltage 3 x 400V (3 x 500V) .......... 26
5.3.2 1-speed operation at operating voltage 3x400V (3 x 500V) ............ 26
5.4 Motor terminal diagram for 2-speed three-phase external rotor motor
3 x 400V, 50Hz (motor type A, B, R)............................................................ 27
MAXX Vent VN Contents
FläktGroup DC-2011-0148-GB 2022-09/R5 • Subject to modification 5
5.4.1 2-speed operation at operating voltage 3 x 400V.............................27
5.4.2 1-speed operation at operating voltage 3 x 400V.............................27
5.5 Motor terminal diagram for 1-speed single-phase motor 1 x 230V, 50Hz
(motor type D, E) ..........................................................................................28
5.5.1 1-speed operation at operating voltage 1 x 230V.............................28
5.5.2 1-speed operation at operating voltage 1 x 230V (external control).28
5.6 Motor terminal diagram for continuously variable EC fan motor 1 x 230V,
50Hz - recirculating air unit (motor type Y) ...................................................29
5.7 Motor terminal diagram for continuously variable EC fan motor 3 x 400V,
50Hz - recirculating air unit (motor type Z) ...................................................29
5.8 Overview of the MATRIX control electronics ................................................30
5.8.1 Controller type MATRIX 2001 and MATRIX 3001 ............................30
5.8.2 Controller type MATRIX 2002 and MATRIX 3002 ............................31
5.8.3 Controller type MATRIX 4002 and MATRIX 4002+IO ......................32
5.8.4 Controller type MATRIX 2003 and MATRIX 3003 ............................33
5.8.5 Controller type MATRIX 4003 and MATRIX 4003+IO ......................34
5.8.6 Controller type MATRIX 4004 and MATRIX 4004+IO ......................35
5.9 Installation site of control panel / room temperature sensor .........................36
5.9.1 Connecting cable to control panel ....................................................37
5.10 Electrical connection with MATRIX...............................................................38
5.10.1 Connecting mains supply voltage for 230V units..............................38
5.10.2 Connecting mains supply voltage for 400V units..............................39
5.10.3 Connecting control cables ................................................................39
5.10.4 Connecting bus connection ..............................................................41
5.10.5 Connecting external sensor (option).................................................43
5.10.7 Connecting room temperature sensor ..............................................43
5.10.8 Connecting anti-freeze sensor..........................................................43
5.10.10Connecting air quality sensor ...........................................................44
5.10.11Connecting status and error messages............................................44
5.10.12Connecting function inputs and outputs ...........................................45
5.10.13Connecting secondary air louvre ......................................................46
5.10.14Connecting differential pressure switch............................................46
5.10.15Connecting mixed air damper...........................................................46
5.10.16Connecting extract air fan control.....................................................47
5.11 MATRIX.NET network and shielding connection .........................................49
5.11.1 Group structure.................................................................................51
5.11.2 Network structure MATRIX.Net ........................................................51
5.11.3 Topologies of network MATRIX.Net .................................................51
5.11.4 Line structure....................................................................................52
5.11.5 Line structure with branch feeder .....................................................52
5.12 Connection for MC4 control units or third-party controls ..............................55
5.12.1 Functions of MC4 control unit...........................................................55
5.13 Connecting actuators for mixed air module and blocking damper................58
5.14 Connection for differential pressure switch...................................................59
5.15 Connection for louvre actuator......................................................................59
6 Commissioning............................................................................. 60
6.1 Pre-commissioning checklist ........................................................................60
6.1.1 Prior to commissioning the following checks must be carried out: ...60
6.2 Operation ......................................................................................................61
6.2.1 Fan ...................................................................................................61
6.2.2 Regulated mixed air chamber/damper .............................................61
6.2.3 Secondary air louvre.........................................................................61
6.2.4 Differential pressure switch ..............................................................61
Contents MAXX Vent VN
6FläktGroup DC-2011-0148-GB 2022-09/R5 • Subject to modification
6.3 Operating instructions .................................................................................. 61
6.4 Decommissioning......................................................................................... 61
6.5 Operation with MATRIX control system ....................................................... 62
6.5.1 Terminating resistors ....................................................................... 62
6.5.2 Setting address................................................................................ 64
6.5.3 Switch on the unit ............................................................................ 66
6.6 Checking data connection............................................................................ 67
6.6.1 Checking control cables................................................................... 67
6.7 Checking control inputs and outputs ............................................................ 68
6.7.1 Function input .................................................................................. 68
6.7.2 Enabling external extract air control ................................................ 69
6.7.3 Operating modes ............................................................................. 69
6.8 MATRIX functions ........................................................................................ 70
6.8.1 Fans with MATRIX 200# to 400#..................................................... 70
6.8.2 Regulated mixed air damper............................................................ 71
6.8.3 EC motor (only MATRIX 4004) ........................................................ 71
6.8.4 Standby mode.................................................................................. 71
6.8.5 Filter replacement indication............................................................ 72
6.8.6 Secondary air louvre........................................................................ 72
6.8.7 Air quality regulation (only MATRIX 400# and 400#+IO)................. 73
7 Maintenance and troubleshooting .............................................. 74
7.1 Maintenance ................................................................................................ 74
7.2 Quarterly maintenance................................................................................. 75
7.3 Semi-annual maintenance ........................................................................... 76
7.4 Malfunctions ................................................................................................. 77
8 Disassembly and disposal........................................................... 78
8.1 Disassembly................................................................................................. 78
8.2 Recycling ..................................................................................................... 78
EC DECLARATION OF CONFORMITY ........................................ 79
– Original Operation Manual – Copyright note
Disclosing, copying, distributing or taking any action in reliance on the contents of this document is strictly prohibited
without express prior consent. Offenders will be held liable for the payment of damages. All rights reserved in the event
of the grant of a patent, utility model or design.
MAXX Vent VN
FläktGroup DC-2011-0148-GB 2022-09/R5 • Subject to modification 7
1 Safety and user instructions
This is an original operation manual verified by the manufacturer.
The MAXX Vent VN unit heaters are developed and manufactured in accordance with
the state-of-the-art technological standards and established technical safety codes
and meet the requirements of the EC Directive on Machinery.
The MAXX Vent VN unit heaters ensure high reliability and satisfy strict quality stand-
ards. Future-oriented technology and pronounced operator and maintenance friendli-
ness were combined in this product series.
Nevertheless, all unit heaters could pose unavoidable residual risk of injury or risk of
damage to equipment or property. Therefore your personal safety and the proper oper-
ation of the unit depend on the strict observance of the safety instructions. Failure to
follow the safety precautions could result in death, serious injury, environmental dam-
age and/or considerable property damage.
Observing the safety instructions in the current operation manual will help avoid the
risks, ensure economical operation of the unit and let you enjoy the full benefits of the
product.
The safety aspects covered by this chapter are valid for the entire operation manual.
1.1 Scope of the operation manual
This operation manual provides critical information about the following:
– Shipping
– Assembly
– Installation
– Electrical connection
– Commissioning
– Operation
– Maintenance, cleaning and disposal
1.2 Symbols used
The following symbols are used in this operation manual:
– Indicates text paragraphs
•Indicates work steps
Indicates work results
User instructions
Refer to this section for additional information on energy efficient operation of the
MAXX Vent VN unit heater.
Recycling!
This symbol is used to highlight instructions for the recycling of packaging material
and disused unit components, which must be separated depending on the material
type. To designate the safety instructions the following symbols and notices are pro-
vided in appropriate places throughout the user document.
MAXX Vent VN
8FläktGroup DC-2011-0148-GB 2022-09/R5 • Subject to modification
To designate the safety instructions the following symbols and notices are provided in
appropriate places throughout the user document.
Hazardous voltage!
This icon indicates a risk of accident due to electric shock.
Risk of personal injury!
This section specifies procedures and precautions for preventing personal injury.
Danger due to overhead loads!
This symbol warns about personal injury and damage caused by overhead loads
and suspended heavy objects.
Danger – sharp cutting edges!
This section specifies procedures and precautions for preventing personal injury
resulting from cuts caused by sheet metal.
Warning: risk of rotating components!
This section specifies procedures and precautions for preventing personal injury
resulting from rotating unit components.
Danger from inflammable materials!
This section specifies procedures and precautions for preventing personal injury
resulting from fire hazard.
Environmental damage!
This icon warns about damage to the environment or refers to all existing national
environmental protection regulations.
Damage to the unit!
This section specifies procedures and precautions for preventing damage to MAXX
VN unit heaters.
MAXX Vent VN
FläktGroup DC-2011-0148-GB 2022-09/R5 • Subject to modification 9
1.3 Safety-conscious work procedures
Observe the following instructions during installation, settings, service and mainte-
nance activities:
• Fluctuations and imbalance in supply voltage must not exceed tolerance limits spec-
ified on the unit identification plate; otherwise this could cause severe unit malfunction
or failure.
1.4 Proper use
Units must be operated in accordance with EU 1253/2014.
MAXX Vent VN unit heaters must only be used only for filtering and ventilating indoor
and outdoor air of industrial facilities, warehouses, sales and exhibition buildings. Fil-
ters, mixed air and air intake modules, suspension sets, control units and control
devices can be supplied as optional accessories.
Proper use also stipulates the observance of the current operation manual as well as
adherence to all inspection and maintenance intervals specified by FläktGroup.
Improper use Any use other than that described above is considered improper. The manufacturer/
supplier is not liable for any damage arising from improper use. The user alone bears
the risk.
1.5 Safety regulations and codes
When carrying out installation, commissioning, maintenance and service of the MAXX
Vent VN units, all local safety regulations and codes as well as generally established
technical practices must be followed, such as the CSN standards below.
•CSN 33 1310 Electrical regulations. Safety regulations for electrical
equipment intended to be used by persons without any
electric-engineering qualifications.
•CSN 33 2000-1 ed. 2 Erection of power installations with rated voltages below
1000V.
•CSN 06 1008 Fire protection of heating appliances.
•EN 13501-1+A1 Fire classification of construction products and building
elements (Flammability rating).
Hazardous voltage!
Disconnect all electric power of the unit and ensure that the power cannot be inad-
vertently switched on; earth, short-circuit, and block off all neighbouring live parts.
Non-compliance can lead to death or serious injury.
Danger due to static discharge!
When doing connection and/or adjustment work on the MAXX Vent VN unit heater,
make sure that you statically discharge yourself before touching printed circuit
boards and electrical components.
Risk of personal injury!
MAXX Vent VN unit heaters must not be operated:
– in areas subject to explosion risk
– in rooms with high dust or moisture content
– in rooms with strong electromagnetic fields
– in rooms with aggressive atmosphere that attacks plastics.
The following accident prevention regulations are valid (VBG1, BGV A2 (previously:
VBG4), VBG7w, VBG9a) and generally recognized codes for machinery and princi-
ples of engineering, in particular DIN VDE 0100, DIN VDE 0105.
MAXX Vent VN
10 FläktGroup DC-2011-0148-GB 2022-09/R5 • Subject to modification
1.6 Modifications and changes
Do not attempt to modify, add components, or convert the MAXX Vent VN unit heater
in any way.
Changes or modifications of the unit heater will invalidate the CE conformity and render
all warranty claims as null and void.
1.7 Spare parts
Only original FläktGroup spare parts are allowed, since FläktGroup is not liable if third-
party spare parts are used.
1.8 Selection and qualification of personnel
User instructions
It must be ensured that every person working on the MAXX Vent VN unit heater has
read and understood the entire operation manual. It is too late to do this after work
has already begun.
Electrical connections may only be carried out by qualified licensed staff or other
individuals with proper professional training and experience in the following areas:
– Occupational health and safety regulations
– Accident prevention regulations
– Directives and recognized codes of practice
All skilled individuals shall be able to assess, what the work entrusted to them
entails and shall be able to recognize and avoid all associated dangers.
MAXX Vent VN Technical description
FläktGroup DC-2011-0148-GB 2022-09/R5 • Subject to modification 11
2 Technical description
2.1 Unit configuration and packaged content
2.2 Specification of material
Fig. 2-1: Unit configuration
Unit part Material
Fan with contact protection grille Various materials
Intake nozzle Galvanized metal sheet
Fan module Galvanized metal sheet
Unit casing Galvanized and painted metal sheet/plastic
Outlet Galvanized metal sheet or aluminium fins + galvanized metal sheet or
Terminal box / fan isolator Various materials
Table 2-1: Specification of material
2
1
3
5
4
1: Basis - wall
2: Fan module with intake nozzle and terminal box
3: Wide-blade fan with contact protection grille
4: Unit casing in design variant
5: Flange for mounting accessories on suction side
Technical description MAXX Vent VN
12 FläktGroup DC-2011-0148-GB 2022-09/R5 • Subject to modification
2.3 Unit variants
2.4 Unit configuration
MAXX Vent HN unit heater comprises the following parts: fan and casing performed in
galvanized painted metal sheet. The casing is optionally available in RAL colour
selected by the customer. The discharge side is fitted with a selectable discharge lou-
vre. The axial fan is fitted on the rear side and is equipped with a contact protection
grille according to EN ISO 13857.
Unit rear side provides connections for filter accessories or outdoor air supply. M8 nuts
are riveted on the sides of the fan chamber (4 on each side) and are used to secure
the unit with brackets or suspensions on the wall or below the ceiling.
Fig. 2-2: Unit heater with casing in design casing and second-
ary air louvre
Fig. 2-3: Unit heater with casing in industrial casing and basic
wall louvre
MAXX Vent VN Technical description
FläktGroup DC-2011-0148-GB 2022-09/R5 • Subject to modification 13
2.5 Unit dimensions
Fig. 2-4: Unit heater dimensions
Table 2-1: Unit dimensions
2.6 Unit weight
Table 2-1: Weight including basic outlet and 3-speed motor fan
Minimum mounting space for installation and maintenance
Minimum mounting space for installation and maintenance
Industrial casing
Design casing
Dimensions / unit size 1 2 3 4 5
A642 738 866 1026 1154
B520 616 744 904 1032
C387 387 387 452 434
D (for EC motor) 150 150 175 175 -
E (for sickle-blade fan) 35 50 51 66 15
E (for wide-blade fan) 60 81 100 112 -
F (for EC motor) 150 150 170 150 -
G418 514 642 802 930
H451 547 675 835 963
I300 300 400 400 500
M 470 566 694 854 982
Model size VN1 VN2 VN3 VN4 VN5
Weight (kg) 26 34 45 62 88
Technical description MAXX Vent VN
14 FläktGroup DC-2011-0148-GB 2022-09/R5 • Subject to modification
2.7 Operating limits
Max. allowed ambient temperature -20°C to +40°C
Operating voltage 3 x 400V (500V), or 1 x 230V~ 50Hz
Protection class IP 54
Power consumption refer to unit identification plate
Max. dust concentration in air 10 mg/m3
2.8 Sound and electric data
User instructions
Other important data regarding unit dimensions, weight, connections and sound
power are covered in the “Data and Facts – MAXX Vent VN Unit Heater”.
Model
size
Speed A-rated sum level Max.
power
consump-
tion kW
Max.
current
consump-
tion A
Sound
power
dB(A)
Sound
pressure*
dB(A)
RPM
AC motor A - 3 x 400V 2-speed (low speed range)
1860 61 46 0.05 0.28
670 55 40 0.03 0.16
2910 65 50 0.12 0.45
710 61 46 0.07 0.26
3640 66 51 0.12 0.49
500 60 45 0.07 0.28
4650 68 53 0.24 0.72
500 59 44 0.15 0.41
AC motor B - 3 x 400V 2-speed (high speed range)
11320 71 56 0.14 0.49
1050 67 52 0.09 0.28
21270 76 61 0.29 0.61
890 69 54 0.19 0.35
3900 76 61 0.31 0.86
660 70 55 0.20 0.50
4910 81 66 0.51 1.31
740 76 61 0.37 0.76
AC motor C - 3 x 400V 3-speed
2
1380 75 60 0.34 1.01
1060 70 55 0.25 0.58
690 58 43 0.07 0.50
3
910 73 58 0.28 0.92
730 69 54 0.20 0.53
460 57 42 0.07 0.26
4
920 80 65 0.58 1.47
740 75 60 0.43 0.85
460 64 49 0.14 0.73
AC motor D - 1 x 230V 1-speed (low speed range)
1 920 61 46 0.09 0.52
2 890 65 50 0.14 0.88
AC motor E - 1 x 230V 1-speed (high speed range)
1 920 71 56 0.19 1.00
2 1210 76 61 0.33 1.60
3 890 76 61 0.33 1.90
4 910 81 66 0.55 2.80
AC motor R - 3 x 400V 2-speed (high speed range)
3900 73 58 0.34 1.01
720 68 53 0.23 0.59
4870 78 63 0.76 1.84
650 73 58 0.47 1.06
5900 80 65 0.85 1.45
680 71 56 0.47 0.83
Model
size
Speed A-rated sum level Max.
power
consump-
tion
kW
Max.
current
con-
sumption
A
Sound pow-
er
dB(A)
Sound
pressure*
dB(A)
RPM
AC motor S - 3 x 400V 3-speed
1
1370 72 57 0.17 0.55
1070 66 51 0.12 0.32
700 56 41 0.04 0.28
2
1370 75 60 0.34 0.67
1030 67 52 0.26 0.50
700 58 43 0.07 0.43
3
900 73 58 0.38 0.98
680 68 53 0.27 0.57
450 58 43 0.09 0.49
4
870 78 63 0.68 1.78
660 73 58 0.41 1.03
420 64 49 0.12 0.89
5
920 80 65 0.92 2.20
770 71 56 0.66 1.20
460 66 51 0.19 0.88
AC motor V - 3 x 500V 3-speed
1
1370 72 57 0.17 0.44
1070 66 51 0.12 0.26
700 56 41 0.04 0.23
2
1370 75 59 0.34 0.70
1030 67 52 0.26 0.40
700 58 43 0.07 0.34
3
900 73 58 0.38 0.78
680 68 53 0.27 0.46
450 58 43 0.09 0.39
4
870 78 63 0.68 1.42
660 73 58 0.41 0.82
420 64 49 0.12 0.71
5
920 80 65 0.92 2.03
770 71 56 0.66 1.18
460 66 51 0.19 1.02
EC Motor Y - 1 x 230V, continuously variable
1 1830 80 66 0.33 1.80
2 1605 78 64 0.33 1.95
3 1000 75 60 0.37 2.10
4 1050 77 63 0.69 4.30
5 890 75 61 0.63 3.40
EC Motor Z - 3 x 400V, continuously variable
3 1450 84 70 1.18 2.10
4 1200 80 65 1.07 2.00
5 960 77 63 0.75 1.40
* Sound pressure: standard values at 5 m distance to the unit side, at maximum air volume flow and low-reflection room. Hall-type industrial
building, volume 1500 m3, absorption surface 200 m2 Sabin, hemispherical radiation = direction coefficient 2. These values can be significantly
influenced by the indoor characteristics in a positive or negative way.
** Values apply to the relevant EC control voltage
MAXX Vent VN Technical description
FläktGroup DC-2011-0148-GB 2022-09/R5 • Subject to modification 15
2.9 Air side accessories
The following accessory items can be delivered for the MAXX Vent VN unit heater:
Symbol “#” - see unit type code on page 3
Type description Order No. Design
Mixed air module, type 1* ZH#.200# Recirculating and outside air offset by 90°
Mixed air module, type 2* ZH#.210# Recirculating and outside air opposite at 180°
Outside air blocking damper* ZH#.230# Galvanized metal sheet or stainless steel
Flexible connector ZH#.2500 Elastic spacer, max. overall length 150 mm
Rectangular duct 150 ZH#.2600 Spacer, overall length 150 mm
Rectangular duct 1000 ZH#.2700 Overall length 1000 mm
Duct bend 90°, symmetrical ZH#.2800 90° symmetrical, tapered with run-around mounting frame
Duct connecting bend 90°, asym-
metrical
ZH#.2900 90° asymmetrical, tapered with run-around mounting frame
Wall air-intake hood ZH#.3100 Galvanized metal sheet
External weather grille ZH#.3200 Galvanized metal sheet, overall depth 45 mm
End grille for accessories ZH#.3300 To complete accessories on the intake side
Duct through slanted roof ZH#.3400 Galvanized metal sheet
Roof air-intake hood ZH#.350# Painted metal sheet in RAL 9002 with bird protection grille, with-
out filter set or with filter set
Mat filter ZH#.370# In frame, with filter fleece class G2-G4, according to EN 779
Bag filter for roof air intake hood
ZH#.380# Filter G2 or G4
Bag-filter module ZH#.360# Module with filter
Spare bag filter for module “36” ZH#.3902
ZH#.3904
Filter G2
Filter G4
Mat filter-spare filter fleece ZH#.400# Bag filter insert class G2-G4
Roof duct with flat roof-duct base
ZH#.4900 Galvanized metal sheet
Frame for wall connection ZH#.5100 As spacer for wall opening
Flange ZH#.5200 Only for recirculating air units
Compact C type suspension ZH#.5300 For recirculating air units
Studio type suspension ZH#.5400 For recirculating air units (in design version with wall outlets)
Modular type suspension ZH#.550# Only wall mounting
Ceiling suspension ZH#.5600
ZH#.5601
ZH#.5602
ZH#.5603
Installation without threaded rod
Threaded rod 1 m - M10
Threaded rod 2 m - M10
Threaded rod 3 m - M10
Table 2-1: Air side accessories MAXX Vent VN
User instructions
For all other data on intake side accessories refer to “Data and Facts – MAXX Vent
VN Unit Heater”.
Shipping and storage MAXX Vent VN
16 FläktGroup DC-2011-0148-GB 2022-09/R5 • Subject to modification
3 Shipping and storage
3.1 Shipping
Observe the manufacturer’s instructions regarding shipping and storing the unit (see
labels on the packing).
3.2 Shipping and handling of the unit
•Attach lifting gear to the designated points of the assembly unit. Chains/slings
should not be knotted and/or be exposed to sharp edges. Pay special attention to
equal weight distribution.
Only lifting gear with sufficient load-bearing capacity is allowed.
Fig. 3-1: Transporting the unit
User instructions
•When the unit heater is delivered and unpacked, check that the delivery is correct
according to the dispatch note, and also check for completeness and transit
damage.
•Ship and store unit in original packing!
Damage to the unit!
•After shipment, check to make sure that the unit is not damaged.
User instructions
Claims for damage or missing parts can be filed with the insurance company only if
shipping damage is confirmed by an authorized worker of the shipping company.
Danger due to overhead loads!
Do not move air-handling units over people.
Risk of personal injury!
Do not use damaged transport devices.
Use a fork lift truck only if the unit is placed on a pallet.
Danger – sharp cutting edges!
Use personal protective gear such as safety gloves, footwear and protective clothes
during transport.
MAXX Vent VN Shipping and storage
FläktGroup DC-2011-0148-GB 2022-09/R5 • Subject to modification 17
3.3 Storage
Protect the MAXX Vent VN unit from humidity and dirt. Store the unit on premises of
class IE12, in accordance with the requirements of EN 60 721-3-1.
User instructions
Allowable storage conditions:
Air temperature: -25 °C to +40 °C
Air humidity: 50 to 85 % (relative humidity with no condensation)
Assembly MAXX Vent VN
18 FläktGroup DC-2011-0148-GB 2022-09/R5 • Subject to modification
4 Assembly
4.1 Load-bearing capacity of the installation site
4.2 Ceiling mounting
Consider: suspension height, distance between the units and minimum distance from
the ceiling. The minimum permissible height above the floor is 2.7 m.
Minimum distance from ceiling A (refer to Fig. 4-1)
Provide minimum distance to ceiling to allow sufficient air circulation and ensure ade-
quate access for maintenance.
User instructions
The installation site must be vibration-free and suitable for permanently supporting
the weight of the unit heater. If necessary, the approval of a structural engineer or
architect must be received.
For mounting the unit 2 sets with 4 M8 nuts are located on the fan module - refer to
Fig. 2-4. The fixing material is included with the suspensions. Unused M8 riv-nuts
should be covered by M8 screws that hold the unit to the transport pallet.
Table with suspension height of
unit for ceiling mounting
Fig. 4-1: Suspension height for ceiling mounting
Suspension height
Louvre in verti-
cal position
Unit size Suspension
max. (m)
VN1K 11.5
VN2K 14.0
VN3K 13.0
VN4K 14.5
VN5K 12.0
User instructions
The maximum height of the unit ceiling installation varies depending on the dis-
charge temperature, reduced speed and air volume flow due to accessories.
Model size 1 2 3 4 5
Clearance A
(mm) 300 300 400 400 500
MAXX Vent VN Assembly
FläktGroup DC-2011-0148-GB 2022-09/R5 • Subject to modification 19
Unit clearance with ceiling installation (refer to Fig. 4-2)
In order to provide a favourable air distribution pattern in the occupied zone, we rec-
ommend that the following distances between units are maintained:
Fig. 4-2: Distance between units with ceiling mounting
The ceiling installation for recirculating air units with “Ceiling” suspension (ZH#.570#)
is given in Fig. 4-6 and for mixed air units - refer to Fig. 4-10.
4.3 Wall mounting
It is necessary to consider the minimum height, the direction of discharged air flow, dis-
tance between units and minimum distance from the wall (refer to Fig. 4-3).
Direction of discharged air flow
Set the direction of discharge so as to avoid air draughts in the room. The primary air
jet must not be directed against walls, beams, cranes, shelves, columns or similar ob-
stacles!
Recommended distances between wall-mounted units (refer to Fig. 4-3)
The distances between units depend on the heat demand, number of units and their
arrangement.
Minimum distance from wall A (refer to Fig. 4-3)
Provide minimum distance to wall to allow sufficient air circulation and ensure ade-
quate access for maintenance.
6 - 12 m 3 - 6 m
Risk of personal injury!
The minimum permissible height above the floor is 2.7 m.
User instructions
Wall mounted unit heaters must not be mounted too high above the floor in order to
ensure good mixing of bottom air layers.
Model size 1 2 3 4 5
Clearance A (mm) 300 300 400 400 500
Assembly MAXX Vent VN
20 FläktGroup DC-2011-0148-GB 2022-09/R5 • Subject to modification
Fig. 4-3: Distance between units with wall mounting
Air throw
Wall mounting of a recirculating air unit with “Compact C” suspension (ZH#.5300) refer
to Fig. 4-6, with “Modular” suspension (ZH#.5500) refer to Fig. 4-7, with “Studio” sus-
pension (ZH#.5400) refer to Fig. 4-8, and a mixed air unit with “Modular” suspension
(ZH#.5503) refer to Fig. 4-10
Air throws are specified in the following table:
Fig. 4-4: Air throws with wall mounting
10 - 15 m 5 - 7 m
8 - 11 m 8 - 11 m
Max. air throw
Unit size Air throw
max. (m) - lou-
vre U, W
VN1K 8.2
VN2K 9.5
VN3K 9.3
VN4K 10.8
VN5K 10.2
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