FläktGroup MultiMAXX HE Series User manual

Multi MAXX
®
HE
OPERATION MANUAL

Product Range MultiMAXX HE
2FläktGroup DC-2011-0142-GB 2018-05/R5 • Subject to modifications
Product Range

MultiMAXX HE Unit Type Code
FläktGroup DC-2011-0142-GB 2018-05/R5 • Subject to modifications 3
Unit Type Code
Fig.1-1 Unit code Fig.1-2 Accessories code
HE1 1.UNFOKB.AKD ZHX.XX X X
Model size
1 = Model size 1
2 = Model size 2
4 = Model size 4
Capacity stage
1 = Capacity stage 1
Air flow function
U = Recirculating air unit
M = Mixed air unit
Medium specification
N = Heater bank - 400V
H = Heater bank - 500V(only size 2)
Heat exchanger
F= Stainless steel
Coil connection (front view)
O = from top
Heater bank connection
K = Terminal section of heater bank
Outlet
B = Basic wall
Z = Basic ceiling two sides
U = Secondary air louvre, wall install, manual adjustment
C = Secondary air louvre, ceiling, manually adjustable
W = Motorised secondary air louvre, wall 230 V, open/
close
D = Motorised sec. air louvre, ceiling, 230 V, open/close
K = Terminating flange, pressure side
P = Profile ceiling/wall
L = Deflection louvre, ceiling/wall
V = Four sides, ceiling
A = Discharge nozzle ceiling
T = Gate nozzle
O = Without outlet
Intake modules
20 = Mixed air module, type 1, direct
21 = Mixed air module, type 2, lateral
23 = Fresh air shut-off damper
25 = Flexible canvas connections
26 = Rectangular duct 150
27 = Rectangular duct 1000
28 = Duct connecting bend 90°, asymmetrical
29 = Duct connecting bend 90°, assymetrical
31 = Air intake hood, wall
32 = External weather grille
33 = Contact protection grille
34 = Duct through slanted roof
35 = Bag filter for roof air intake hood
(38 = spare bag filter for 35xx)
36 = Bag filter module
(39 = spare bag filter for 36xx)
37 = Mat filter module
(40 = spare bag filter for 37xx)
49 = Duct through roof with flat roof plinth
51 = Frame for wall connection
52 = Flange (for recirculating air units)
Without outlet
Motor/speeds
A = 3 ~ 400 V 2-speed low speed range
wide wing fan
B = 3 ~ 400 V 2-speed upper speed range
wide wing fan
V = 3 ~ 500 V 3-speed - sickle-blade fan - only size 2
Electric equipment
K = Terminal box of fan
Design
D = Heat exchanger in industrial design RAL 7000
Model size
1 = Model size 1
2 = Model size 2
4 = Model size 4
Material/Design
0 = Steel sheet, plastic
Actuators for louvers and mixed air modules
0 = Actuator by others
1 = Manual adjustment
2 = Actuator 230 V, open/close
3 = Actuator 230 V, open/close + poti
4 = Actuator 230 V, open/close + final position switch
5 = Actuator 230 V+ spring return
If required, filter insert / electrical equipment
0 = without
2 = G2/ without differential pressure switch
3 = G3/ without differential pressure switch (only for "37")
4 = G4/ without differential pressure switch
5 = G2/ with differential pressure switch
6 = G3/ with differential pressure switch (only for "37")
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 accessories 7 = 25+23+51
1 = 25+20+51 8 = 25+36+23+51
2 = 25+36+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 ceiling suspension:
0 = Installation without threaded rod
1 = Mounting kit with threaded rod 1 m
2 = Mounting kit with threaded rod 2 m
3 = Mounting kit with threaded rod 3 m

Table of Contents MultiMAXX HE
4FläktGroup DC-2011-0142-GB 2018-05/R5 • Subject to modifications
Table of Contents
Product Range ..............................................................................................2
Unit Type Code .............................................................................................3
Table of Contents .........................................................................................4
Safety and User Information ........................................................................5
Availability of the operation manual ..............................................................................5
Scope of the operation manual .....................................................................................5
Used symbols ................................................................................................................5
Labelling of safety information ......................................................................................6
Safety-conscious working .............................................................................................7
Proper use .....................................................................................................................7
Safety regulations and codes ........................................................................................8
Modifications and changes ............................................................................................8
Spare parts ....................................................................................................................8
Disposal ........................................................................................................................8
Personnel selection and qualification ............................................................................8
Technical Description ..................................................................................9
Technical description and scope of supply ...................................................................9
Specification of material ................................................................................................9
Functional description of the unit ................................................................................10
Operating limits ...........................................................................................................10
Unit dimensions and minimum installation clearance ..................................................10
Specifications ..............................................................................................................11
Specification for the Ecodesign Directive passed by the EU Commission 2016/2281 13
Shipping and Storage ................................................................................14
Delivery .......................................................................................................................14
Transport .....................................................................................................................14
Storage ........................................................................................................................14
Assembly .....................................................................................................15
Load-bearing capacity of the installation site ..............................................................15
Ceiling installation .......................................................................................................15
Wall installation ...........................................................................................................16
Safety clearances ........................................................................................................17
Unit installation ............................................................................................................18
Electrical Connection .................................................................................21
Terminal box ...............................................................................................................21
Wiring diagrams ..........................................................................................................21
Motor terminal diagram for 2-speed three phase current external rotor motor,
3 x 400 V (type A, B) ...................................................................................................23
Motor terminal diagram for 3-speed three phase current external rotor motor,
3 x 500 V (type V) .......................................................................................................24
Connecting actuators for mixed air module and blocking damper ..............................25
Connecting actuator for secondary air louvre (D, W) ..................................................25
Connection for differential pressure switch .................................................................25
OSHE control cabinet ..................................................................................................26
Commissioning and Operation .................................................................31
Safety check ................................................................................................................31
Operation ....................................................................................................................32
Deactivating unit ..........................................................................................................32
Servicing and Maintenance .......................................................................33
Servicing and cleaning ................................................................................................33
Maintenance ................................................................................................................33
Quarterly maintenance ................................................................................................34
Half-yearly maintenance .............................................................................................36
Operating faults ...........................................................................................................37
Dismantling and Disposal ..........................................................................38
Dismantling .................................................................................................................38
Disposal ......................................................................................................................38
EC Declaration of Conformity ...................................................................39

MultiMAXX HE Safety and User Information
FläktGroup DC-2011-0142-GB 2018-05/R5 • Subject to modifications 5
1 Safety and User Information
This is an original operation manual verified by the manufacturer.
The MultiMAXX HE electric unit heaters are developed and manufactured in accord-
ance with the state-of-the-art technological standards and established technical safety
codes and meet the requirements of the EC Directive on Machinery.
The MultiMAXX HE electric unit heaters are reliable in operation and satisfy strict qual-
itystandards.Thisproductrangecombinesfuture-orientedtechnologywithahighlevel
of user friendliness and ease of maintenance.
However, all electric unit heaters could pose unavoidable residual risk of injury or risk
of equipment or property-damage only accidents. Therefore your personal safety and
the proper operation of the unit depend on the strict observance of the safety instruc-
tions. Failure to follow the safety precautions could result in death, serious injury or
equipment or property-damage-only accidents.
Observing the safety instructions in the current operation manual will help avoid the
risks, ensure economical operation of the unit and enjoy full benefits of the product.
The safety aspects covered by this chapter are valid for the entire operation manual.
1.1 Availability of the operation manual
The accompanying operation manual includes important instructions on safe and cor-
rect operation of the MultiMAXX HE electric unit heaters.
This manual must always be available at the site where unit is operating. Every person
working on the equipment must read this manual fully before commencing the work
and take all relevant information while performing a task into account.
This operation manual applies to operators, building technicians, technical personnel
or instructed persons as well as electricians.
1.2 Scope of the operation manual
This operation manual covers critical points on the following subjects:
– Shipping
– Assembly
– Installation
– Electrical connection
– Commissioning and operation
– Maintenance, cleaning and disposal
1.3 Used symbols
The following symbols are used in this manual:
– This symbol is used to indicate normal lists.
•This symbol indicates instructions to follow.
The result of an action is indicated with this symbol.
NOTE!
This symbol denotes additional instructions on using the MultiMAXX HE.

Safety and User Information MultiMAXX HE
6FläktGroup DC-2011-0142-GB 2018-05/R5 • Subject to modifications
1.4 Labelling of safety information
RECYCLING!
This symbol points out proper procedure for recycling of package material and dis-
used unit components, which must be separated depending on the material type.
PROPER BOOTS REQUIRED!
This symbol points out that you must wear proper boots.
WEAR PROTECTIVE GLOVES!
This symbol points out that you must wear proper gloves.
HAZARDOUS VOLTAGE!
This symbol indicates a risk of electrical shock when carrying out certain job(s).
PERSONAL INJURY!
This section specifies procedures and precautions for the prevention of personal
injuries due to high pressure.
DANGER DUE OVERHEAD LOADS!
Thissymbolwarnsaboutpersonalinjuryanddamagecausedbyoverheadloadsand
suspended heavy objects.
DANGER OF HOT SURFACES!
Thissectionspecifies procedures and precautionsforpreventingpersonalinjurydue
to hot surfaces.
DANGER – SHARP CUTTING EDGES!
This section specifies procedures and precautions for preventing personal injuries
due to cutting on thin metal fins.
DANGER OF ROTATING UNIT PARTS!
This section specifies procedures and precautions for preventing personal injury
resulting from rotating unit components.
DANGER OF INFLAMMABLE SUBSTANCES!
This section specifies procedures and precautions for preventing personal injury
resulting from fire hazard.
ENVIRONMENTAL DAMAGE!
This symbol warns you aboutdamage to the environment and turns your attention to
all existing national environmental protection regulations.
EQUIPMENT DAMAGE!
This section specifies procedures and precautions regarding the prevention of dam-
age to the MultiMAXX HE electric unit heater.

MultiMAXX HE Safety and User Information
FläktGroup DC-2011-0142-GB 2018-05/R5 • Subject to modifications 7
1.5 Safety-conscious working
Observe the following instructions during installation, settings, service and mainte-
nance tasks:
•Fluctuations and imbalance in supply voltage must not exceed tolerance limits
specified on the unit identification plate; otherwise this could cause severe unit
malfunction, overload states or failure.
1.6 Proper use
The MultiMAXX HE electric unit heaters are installed in industrial, sales and trade facil-
itiesas wellas warehouses with normalambientconditions according tothe EN60 721
-3-3 and are used for heating, ventilating or cleaning fresh and indoor air. Accessories
can include filters, mixing air modules, intake modules, suspensions and panels or
OSHE control cabinet with the relevant sensors.
The implementation of the unit must be carried out in accordance with Regulation (EU)
No. 1253/2014
Proper use also stipulates the observance of the current operation manual, operating
instructions for the accessories of the MultiMAXX HE unit as well as the 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 damages arising from improper use. The user alone bears
the risk.
The following accident prevention regulations are valid (VBG1, BGV A2 (previously:
VBG4),VBG7w, VBG9a) andgenerallyrecognized codes formachineryand principles
of engineering, in particular DIN VDE 0100, DIN VDE 0105.
HAZARDOUS VOLTAGE!
Disconnect all electric power of the unit and ensure the power cannot be inadvert-
ently energised, earth, short-circuit and block off all neighbouring live parts.
Teile abdecken oder abschranken. Non-compliance can lead to death or serious
injury.
DAMAGE RISK DUE TO STATIC DISCHARGE!
While carrying out connections or adjustments on the MultiMAXX HE electric unit
heater make sure that you discharge yourself statically before touching PC boards
and electrical components.
PERSONAL INJURY AND EQUIPMENT DAMAGE!
The MultiMAXX HE unit may not be operated:
– in locations with explosion danger
– in rooms with high dust or moisture content
– in rooms with strong electromagnetic fields
– in rooms with aggressive environment that may attack plastics.

Safety and User Information MultiMAXX HE
8FläktGroup DC-2011-0142-GB 2018-05/R5 • Subject to modifications
1.7 Safety regulations and codes
When carrying out installation, commissioning, maintenance and service of the
MultiMAXX HE units, all safety regulations and codes as well as generally established
technical practices must be considered.
1.8 Modifications and changes
It is not allowed to perform any changes or modifications of the MultiMAXX HE unit.
Changes or modifications of the MultiMAXX HE unit by others will render the CE con-
formity and all warranty claims null and void.
1.9 Spare parts
Only original FläktGroup spare parts are allowed, since FläktGroup is not liable if third-
party spare parts are used.
1.10 Disposal
Main and operating supply materials must be disposed of depending on their material
type in a safe and environmentally friendly manner - refer to section "Disposal"
on page 35.
1.11 Personnel selection and qualification
It must be ensured that every person working on the MultiMAXX HE unit has read and
understood entire operation manual. Please read this document fully beforecommenc-
ing any work, and not while performing a task.
NOTE!
Electrical connection must only be carried out by qualified licensed staff or other indi-
viduals with proper professional training and experience in the following areas:
– Regulations concerning health and safety in the workplace
– Accident prevention regulations
– Directives and recognized codes of practice
All skilled individuals must be able to assess, what the work entrusted to them
entails, and must be able to recognize and avoid all associated dangers.

MultiMAXX HE Technical Description
FläktGroup DC-2011-0142-GB 2018-05/R5 • Subject to modifications 9
2 Technical Description
2.1 Technical description and scope of supply
2.1 Specification of material
Fig. 2-1: Unit components
Pos. 1a: Wide wing fan - size 1, 2 and 4 (3 x 400 V)
Pos. 1b: Sickle-blade fan - size 2 (3 x 500 V)
Pos. 2: Suction nozzle
Pos. 3: Fan section
Pos. 4: Casing of heater bank
Pos. 5: Heater bank
Pos. 6: Protection grille
Pos. 7: Secondary air louvre (optional)
Pos. 8: Cover for electric connection of heater battery
Pos. 9: Terminal box for electric connection of fan motor
Unit part Material
Fan with contact protection grille Various materials
Intake nozzle Galvanized metal sheet
Heater bank Various materials
Unit casing Galvanized painted metal sheet
Outlet Galvanized metal sheet + aluminium fins
Terminal box Various materials
Tab. 2-1: Specification of material
1a
1b
2
9
3
4
5
6
7
8

Technical Description MultiMAXX HE
10 FläktGroup DC-2011-0142-GB 2018-05/R5 • Subject to modifications
2.2 Functional description of the unit
The MultiMAXX HE electric unit heater comprises a fan and a heater bank with casing.
Electrical heating elements are performed in stainless steel and wired in 3 heater
groups (see Tab. 2-3) to a terminal strip. Regulation and monitoring of the unit heater
is performed by control unit of the OSHE series (refer to section 5.2) or regulation pro-
vided by others.
The fan casing is performed in galvanized metal sheet, heaterbank casing - in painted
metal sheet (RAL 7000). The air discharge opening can accommodate up to 11 diffe-
rent types of discharge louvres. A wide wing or sickle blade fan is located in the fan
casing on the rear side of the unit heater. The protection grille (conforming with
EN 13857) prevents possible contact with the fan. The unit rear side can be supplied
with an extension for mounting air intake accessories. Mounting fittings for suspending
the unit with a ceiling or wall suspension are located laterally on the fan box. The com-
ponents made of non-ferrous metal and galvanized connection parts are not protected
by paint.
2.3 Operating limits
Max. ambient temperature -20°C to +40°C
Operating voltage 3 x 400 V or 3 x 500 V ~ 50 Hz
Protection class IP 40
Max. relative humidity 95% at 25°C
Corrosion protection class C3 - EN ISO 12944-2
Max. dust content 10 mg / m3
Power consumption refer to unit identification plate
2.4 Unit dimensions and minimum installation clearance
Fig. 2-2: Unit dimensions
NOTE!
Other important data regarding unit capacity, weight, connections and sound power
are covered in the „MultiMAXX HE Data and Facts“.
Minimum clearance for installation and maintenance

MultiMAXX HE Technical Description
FläktGroup DC-2011-0142-GB 2018-05/R5 • Subject to modifications 11
Tab. 2-2: Unit dimensions
2.5 Specifications
Tab. 2-3: Specifications
* Sound pressure: standard values at 5 m distance to the unit side, at maximum air flow rate and low reflection room. Industrial hall volume
1500 m3, absorption surface 200 m2Sabin, hemispherical radiation = direction coefficient 2. These values can be significantly influenced by the
indoor characteristics in a positive or negative way.
Size / unit model size 1 2 4
A [mm] 642 738 1026
B [mm] 520 616 904
C [mm] 387 387 452
E (wide wing fan) [mm] 60 81 112
E (sickle-blade fan) [mm] -50-
G [mm] 418 514 802
H [mm] 451 547 835
I [mm] 300 300 400
M [mm] 470 566 854
Model size
Speed Air fow
rate
VL
Heating capacity QTAir
heating
at max.
heating
duty T
Voltage
U
Max.
rated
current
l
Motor
power
consump-
tion
Motor
current
con-
sump-
tion l
Sound
power
Sound
pres-
sure *
Weight
without
louvre
Max.
Speed
123
[min-1] [m3/h] [kW] [kW] [kW] [kW] [K] [V] [A] [kW] [A] [dB(A)] [dB(A)] [kg]
A - 3 ~ 400 V 2-speed (low speed range)
1670 1410 12 4 8 12 26
3x400
17.3 0.03 0.05 55 40 28
860 1620 23 0.05 0.10 61 46
2710 2260 21 7 14 21 27 30.3 0.07 0.14 61 46 34
910 2710 23 0.12 0.30 65 50
4500 4610 42 14 28 42 27 60.6 0.15 0.30 59 44 69
650 6480 19 0.24 0.59 68 53
B - 3 ~ 400 V 2-speed (high speed range)
11050 1990 12 4 8 12 18
3x400
17.3 0.03 0.14 67 52 28
1320 2470 15 0.14 0.25 71 56
2890 3010 21 7 14 21 21 30.3 0.19 0.29 69 54 34
1270 3980 16 0.29 0.50 76 61
4740 8340 42 14 28 42 15 60.6 0.37 0.61 81 66 69
910 9900 13 0.51 1.00 76 61
V - 3 ~ 500 V 3-speed
2
700 1970 12.2 6.1 9.15 12.2 18 3x500 14.0 0.07 0.14 55 43 361070 2870 13 0.26 0.34 67 52
1370 3810 10 0.34 0.50 75 60

Technical Description MultiMAXX HE
12 FläktGroup DC-2011-0142-GB 2018-05/R5 • Subject to modifications
2.6 Air side accessories
The following accessories can be supplied for the MultiMAXX HE unit heater:
"#" - see unit identification plate on page 3.
Description Order-Nr. Design
Mixing air module type 1 ZH#.200# direct; outside and recirculating air offset 90°
Mixed air module, type 2 ZH#.210# Recirculating and outside air opposite at 180°
Fresh air blocking damper ZH#.230# Galvanized metal sheet
Flexible canvas connections ZH#.2500 Overall length 150 mm
Rectangular duct 150 ZH#.2600 Spacer, overall length 150 mm
Rectangular duct 1000 ZH#.2700 Overall length 1000 mm
Duct connecting bend 90°,
symmetrical ZH#.2800 90° symmetrical, tapered with run-around mounting frame
Duct connecting bend 90°,
asymmetrical ZH#.2900 90° asymmetrical, tapered run-around mounting frame
Air intake hood, wall ZH#.3100 Galvanized metal sheet
External weather grille ZH#.3200 Galvanized metal sheet, overall depth 45 mm
Contact protection grille ZH#.3300 End grille for accessories
Duct through slanted roof ZH#.3400 Galvanized metal sheet
Air intake hood, roof ZH#.350# Metal sheet in RAL 9002 with bird protection grille,
without filter insert or with filter insert
Spare filter for air intake hood, roof ZH#.3802
ZH#.3804 Filter G2 Filter G4
Bag filter module ZH#.360# Galvanized metal sheet, module with bag filter
Spare filter for bag filter module ZH#.3902
ZH#.3904 Filter G2 Filter G4
Mat filter module ZH#.370# Galvanized metal sheet
Spare filter for mat filter module ZH#.4002
ZH#.4003
ZH#.4004
Filter G2
Filter G3
Filter G4
Duct through roof with flat roof plinth ZH#.4900 Galvanized metal sheet
Frame for wall connection ZH#.5100 As spacer for wall opening
Flange ZH#.5200 Only for recirculating air units
Suspension type compact C ZH#.5300 For recirculating air units
Suspension type studio ZH#.5400 For recirculating air units
Modular type suspension ZH#.550# Only for wall mounting
Ceiling suspension ZH#.5600
ZH#.5601
ZH#.5602
ZH#.5603
Mounting kit without threaded rod
Threaded rod 1 m - M10
Threaded rod 2 m - M10
Threaded rod 3 m - M10
Tab. 2-4: Air side accessories
NOTE!
Detailed specification of accessories is presented in project-related documents and
is identical for all types of the MultiMAXX HE units.
Accessories are used to secure the unit on the wall or ceiling as well as to provide
air mixing and filtering together with the possibility for connecting air-flow ducts and
OSHE control box.

MultiMAXX HE Technical Description
FläktGroup DC-2011-0142-GB 2018-05/R5 • Subject to modifications 13
2.7 Specification for the Ecodesign Directive passed by the EU Commission 2016/2281
The values presented in the table below are provided to ensure the implementation of
the EU Directive 2016/2281. This Directive sets the framework for the requirements to
the environmentally-friendly design of energy-related products such as air heaters, air
coolers, units for air cooling in industrial processes with high operating temperature
and fan coil units.
Unit data:
B1- Air heater: no
C2- Air heater: no
C4- Air heater: no
Fuel type: electrical
Unit size
Units
Electric motor
Heating capacity Minimum capacity Casing loss factor Efficiency of heat transfer Annual space heating energy efficiency
Prated,h
[kW] Pmin [kW] Fenv [%] ƞs,flow [%] ƞs,h [%]
1HE11.##F###.AKD AC 12,0 4,0 0,0 96,6 38,4
HE11.##F###.BKD 12,0 4,0 0,0 97,7 38,8
2
HE21.##F###.AKD AC 21,0 7,0 0,0 96,3 38,3
HE21.##F###.BKD 21,0 7,0 0,0 97,3 38,7
HE21.##F###.VKD 12,2 6,1 0,0 97,0 38,4
4HE41.##F###.AKD AC 42,0 14,0 0,0 96,6 38,4
HE41.##F###.BKD 42,0 14,0 0,0 98,0 39,0
Tab. 2-5: Values according to the EU Directive 2016/2281

Shipping and Storage MultiMAXX HE
14 FläktGroup DC-2011-0142-GB 2018-05/R5 • Subject to modifications
3 Shipping and Storage
3.1 Delivery
Manufacturer’s instructions regarding shipping and storing of the unit must be followed
(see labels on the packing).
•Upon receipt of the MultiMAXX HE unit and prior to unloading, inspect the unit for
damage and verify that the shipment is complete
(refer to "Unit configuration and scope of supply" on page 9) as specified in the
freight bill.
•If required, take photographs of all visible transit damage.
3.2 Transport
•Attach lifting gear to the designated points of the assembly unit.
•Chains/slings should not be knotted and/or be exposed to sharp edges.
•The weight must be evenly distributed!
•Only lifting gear with sufficient load carrying capacity is allowed.
•Never use damaged lifting equipmet.
•For your own safety wear gloves and safety footwear when hoisting or shipping the
unit
3.3 Storage
Protect the MultiMAXX HE unit from humidity and dirt. The unit must be stored in
a weather-proof manner indoors in accordance with class IE12 and EN 60 721-3-1
standard.
NOTE!
Missing parts or claims of shipping damage must only be reported to the transport
insurance, if the damage has been confirmed by the delivering carrier.
NOTE!
We recommend to keep the MultiMAXX HE in its original packaging for protection,
ease of handling, shipping and storage. Remove the original packaging only before
installation. The packaging poses a health risk and must be disposed of in accord-
ance with the relevant regulations and be kept out of reach of children. If the unit is
stored for a period of time before installation or commissioning, it must be protected
from damage through elements, build-up of dust and dirt!
DANGER DUE TO OVERHEAD LOADS!
Do not suspend or move MultiMAXX HE unit heater overhead.
PERSONAL INJURY!
– Do not use damaged transport devices.
– Use a fork lift truck only if the electric heater is located on a pallet.
NOTE!
Allowable storage conditions / allowable air condition for uninstalled units:
Air temperature: -25 °C to +40 °C
Air humidity: between 50 and 85 % (relative humidity with no condensation)
Fig. 3-1: Transport

MultiMAXX HE Assembly
FläktGroup DC-2011-0142-GB 2018-05/R5 • Subject to modifications 15
4 Assembly
4.1 Load-bearing capacity of the installation site
4.2 Ceiling installation
It is necessary to consider the suspension height, the distance between the units and
minimum distance from the ceiling.
The minimum permissible height above the floor amounts to 2.7 m.
Minimum distance from ceiling A (see Fig. 4-1)
Provide minimum distance to ceiling to allow sufficient air circulation and ensure ade-
quate access for maintenance.
NOTICE ON UNIT ASSEMBLY AND INSTALLATION!
Theassembly sitemustbevibration-freeandsuitablefor permanentlysupportingthe
weight of the electric unit heater. If necessary, the approval of a structural engineer
or architect has to be received.
For mounting the unit 2 sets with 4 M8 nuts are located on the fan module - refer to
Fig. 2-2. The fixing material is enclosed with suspensions.
Table with suspension height
of unit for ceiling mounting
Fig. 4-1: Suspension height for ceiling installation
NOTE!
The maximum height of the unit ceiling installation varies depending on the dis-
charge temperature, reduced speed and air volume flow due to accessories.
Suspension height
The data in the chart are standard
values and apply to the discharge
temperature, if the latter exceeds
indoor temperature by 15 - 20 K.
Type Max. suspen-
sion height (m)
(outlet C, D)
HE11.##F###.AKD 5.4
7.0
HE11.##F###.BKD 8.8
11.7
HE21.##F###.AKD 7.2
9.2
HE21.##F###.BKD 9.9
14.3
HE21.##F###.VKD 6.3
10.1
14.3
HE41.##F###.AKD 7.0
10.6
HE41.##F###.BKD 14.1
17.7
Model size 124
Clearance A [mm] 300 300 400

Assembly MultiMAXX HE
16 FläktGroup DC-2011-0142-GB 2018-05/R5 • Subject to modifications
Unit clearance with ceiling installation (refer to Fig. 4-2)
In order to provide favourable air distribution pattern in the occupied zone we
recommend 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 suspension „ceiling“ (ZH#.560#)
is specified in Fig. 4-5 and for mixed air unit (ZH#.5602) in Fig. 4-9.
4.3 Wall installation
It is necessary to consider the minimum height, the direction of discharged air flow,
distance between units and minimum distance from the wall (refer to Fig. 4-3).
Direction of discharged air flow
Discharge air flow should be directed as to avoid air draughts in the room. The primary
air flow must not be directed against walls, beams, cranes, shelves, columns or similar
obstacles!
Recommended distances between wall-mounted units (see Fig. 4-3)
The distances between units depend on the heat demand, number of units and their
arrangement.
Minimum distance from wall A (see Fig. 4-3)
Provide minimum distance to wall to allow sufficient air circulation and ensure
adequate access for maintenance.
6 - 12 m 3 - 6 m
PERSONAL INJURY!
The minimum permissible height above the floor amounts to 2.7 m.
NOTE!
Because of heatingreasons wall-mounted electric heaters must not be mounted too
high in order to ensure good mixing of bottom air layers.
Model size 1 2 4
Clearance A [mm] 300 300 400

MultiMAXX HE Assembly
FläktGroup DC-2011-0142-GB 2018-05/R5 • Subject to modifications 17
Fig. 4-3: Distance between units with wall mounting
Wall installation of a recirculating air unit with „Compact C“ suspension (ZH#.5300)
refer to Fig. 4-6, with „Modular“ suspension (ZH#.550#) refer to Fig. 4-7, with „Studio“
suspension (ZH#.5400) refer to Fig. 4-8.
Wall installation of a mixed air unit with „Modular“ suspension (ZH#.5503) refer to
Fig. 4-10.
4.4 Safety clearances
10 to 15 m 5 - 7 m
8 - 11 m 8 - 11 m
Table - air throws with wall mounting
Fig. 4-4: Air throws with wall mounting
Max. air throws with wall mounting
The data in the chart are standard
values and apply to the discharge
temperature, if the latter exceeds
indoor temperature by 15 - 20 K.
Type Air throws [m]
Outlet U, W
HE11.##F###.AKD 5.0
5.9
HE11.##F###.BKD 6.9
8.4
HE21.##F###.AKD 6.2
7.3
HE21.##F###.BKD 7.8
9.9
HE21.##F###.VKD 5.7 7.8
10.0
HE41.##F###.AKD 6.5
8.6
HE41.##F###.BKD 10.3
12.0
NOTE!
Wheninstallinganelectricunitheater,thesafetyclearancesinregardtocombustible
materials must maintained in accordance with CSN 06 1008 and EN 13501-1+A1
regulations. A minimum clearance of 400 mm on the air intake side and 1000 mm in
the air discharge direction must be maintained.

Assembly MultiMAXX HE
18 FläktGroup DC-2011-0142-GB 2018-05/R5 • Subject to modifications
4.5 Unit installation
NOTE!
Electric unit heaters units must be installed in a safe, reliable and visually adequate
manner.
For these reasons, it is recommended to use manufacturer’s suspensions and
mounting brackets.
EQUIPMENT DAMAGE!
The unit must be installed in a stain-free, vibration-free and twist-free way.
NOTE!
Fixation points:
Electric unit heaters are secured in at least 4 fixation points.
Use the screws of the transport safety device.
NOTE!
Completing assembly and unit operation:
It is not allowed to operate the unit in a dusty environment, e.g. when drilling or grind-
ing of concrete, separation of gypsum wallboards, floor grinding or polishing, etc.

MultiMAXX HE Assembly
FläktGroup DC-2011-0142-GB 2018-05/R5 • Subject to modifications 19
Fig. 4-5: Ceiling mounting of a recirculating air unit with
ceiling suspension (ZH#.560#) Fig. 4-7: Wall mounting of a recirculating air unit with modular suspension (ZH#.550#)
Fig. 4-6: Wall mounting of a recirculating air unit with
„Compact C“ suspension (ZH#.5300) Fig. 4-8: Wall mounting of a recirculating air unit with „Studio“ suspension (ZH#.5400)

Assembly MultiMAXX HE
20 FläktGroup DC-2011-0142-GB 2018-05/R5 • Subject to modifications
Fig. 4-9: C eiling mounting of a mixed air unit with accessory items and ceiling suspension
(ZHx.5602)
Fig. 4-10 Wall mounting of a mixed air unit with accessory items and „modular“ suspension
(ZH#.5503)
With mixed air units the flange for mounting accessory items is secured by the factory.
If accessory items are used on the suction side with recirculating air units an additional
flange is required (ZH#.5200).
For wall mounting of mixing air modules recirculating air dampers must be secured in
a vertical position (refer to Fig. 4-10).
Flexiblecanvasconnection(ZHx.2500)orarectangularduct150mm(ZH#.2600)must
be fitted as the first accessory module. Refer to mounting examples in Fig. 4-9 and
Fig. 4-10.
ZH#.3500
ZH#.4900
ZH#.4900
ZH#.200#
ZH#.360#
ZH#.2500 if
required ZH#.2600
ZH#.5602
ZH#.3200
if required
ZH#.3100
ZH#.5100
ZH#.5503
ZH#.210x
ZH#.370x
ZH#.2500 if
required ZH#.2600