FläktGroup MULTIMAXX HG User manual

MULTIMAXX
®
HG
OPERATION MANUAL

MultiMAXX HG
2FläktGroup DC-2011-0141-GB 2021-01/R7 • Subject to modifications
Product range

MultiMAXX HG
FläktGroup DC-2011-0141-GB 2021-01/R7 • Subject to modifications3
Unit Type Code
MultiMAXX Controls Accessories
Suspensions
53 = Compact C
54 = Studio (for wall configuration)
55 = Modular (for wall configuration)
56 = Ceiling suspension
HG2 4.U E F T C B.AMD OSHG 0.EC0M ZH#.####
Model size
2 = Model size 2
4 = Model size 4
Capacity stage
4 = Low capacity
5 = High capacity
Unit model
U = Recirculating-air mode
M = Mixed air unit
Heating medium
E = Natural gas (EG),
Propane-butane (LPG)
Coil
F= High-temperature resistant steel
Control of thermal output
P = Control of supply-air temperature
(only with mixed-air units)
T = Control of room temperature
Unit model
B = Non-room-sealed firing
C = Room-sealed firing
Outlet
A = Outlet nozzle, ceiling
B = Basis - wall
C = SAL, ceiling, manually adjustable
D = Motorized SAL, ceiling, (230 V, Open/Close)
K = Blank flange on discharge side
L = Air deflection louvre
P = Profile outlet
T = Gate nozzle
U = SAL, wall installation, manual adjustment
V = Four sides, ceiling
W = Motorized SAL, wall, (230 V, Open/Close)
Z = Two-side basic ceiling outlet
O = Without louvre
Air-side accessories
20 = Mixed-air module, type 1
21 = Mixed-air module, type 2
23 = Outdoor air blocking damper
25 = Flexible connection
26 = Rectangular duct 150
27 = Rectangular duct 1000
28 = Duct bend 90°
symmetrical
29 = Duct bend 90°
asymmetrical
31 = Wall air-intake hood
32 = External louvre
33 = Contact protection grille
34 = Duct through slanted roof
35 = Roof air-intake hood
36 = Bag filter module
37 = Mat filter module
38 = Spare filter for air intake hood, roof
39 = Spare filter for bag filter module
40 = Spare filter for mat filter module
49 = Duct through roof with flat roof plinth
51 = Frame for wall connection
52 = Flange (for recirculating-air units)
Ohne Auslass
Motor/speeds
AC motors
A = 3x400 V, 2-speed - low speed range, wide-blade fan, for
capacity stage (4)
B = 3x400 V, 2-speed - high speed range, wide-blade fan,
for capacity stage (5)
D=
1x230 V, 2-speed - low speed range, wide-blade fan, for
lower capacity stage (4) (only for size 2)
E = 1x230 V, 2-speed - high speed range, wide-blade fan,
for capacity stage (5)
R = 3x400 V, 2-speed – high speed range, sickle-blade fan,
for capacity stage (5) (only for size 4)
EC motors
Y=
1x230 V continuously variable EC - sickle-blade fan
Z = 3x400 V, continuously variable - sickle blade fan, for ca-
pacity size (5) (only for size 4)
Electric equipment
M = Multifunctional control
Unit casing
D = Heat exchanger casing in industrial design RAL 7000
Model size
2 = Model size 2
4 = Model size 4
Model/material
0 = Standard model
8 = Ecodesign (only for 25, 26, 36, 38, 39)
Actuators for louvers and mixed-air modules
0 = Actuator on site
1 = Manual
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
Filter grade/electric equipment
0 = Without filter, without differential pressure switch
2 = G2/without differential pressure switch
3=
G3/without differential pressure switch (only for ZH#.37)
4 = G4/without differential pressure switch
5 = G2/with differential pressure switch
6= G3/with differential pressure switch (only for ZH#.37)
7 = G4/with differential pressure switch
9 = F7/with differential pressure switch - for Ecodesign
Modular (ZH#.550#) with accessories
0=
without accessories 8 = 25+36+23+51
1 = 25+20+51 9 = 25+37+23+51
2 = 25+36+20+51 A = 26+36
3 = 25+37+20+51 B = 26+37
4 = 25+21+29+51 C = 25+28 (+49...)
5 = 25+36+21+29+51 E = Ecodesign
25(26)+36+20+51
6 = 25+37+21+29+51
7 = 25+23+51 W = without unit accessories with
vertical outlet
Suspension ceiling ( ZH#. 560 # )
0 = Without threaded rod
1 = Threaded rod 1 m
2 = Threaded rod 2 m
3 = Threaded rod 3 m
Control panel, control board
0.000M = Sheet steel casing
Multi
(motors D, E)
0.EC0M = Sheet steel casing
Multi
(drives A, B, R, Y, Z)
0.RDDO = Remote control control-
ler PCB RDDO

Table of Contents MultiMAXX HG
4FläktGroup DC-2011-0141-GB 2021-01/R7 • Subject to modifications
Unit Type Code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1 Safety and User Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.1 Scope of application of the operation manual . . . . . . . . . . . . . . . . . . . . . . . 6
1.2 Icons used . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.3 Safety-conscious work procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.4 Proper use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.5 Safety regulations and codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.6 Modifications and changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.7 Spare parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.8 Selection and qualification of personnel . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.1 Unit configuration and packaged content . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.2 Specification of material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.3 Functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.4 Operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.5 Unit dimensions and minimum installation space . . . . . . . . . . . . . . . . . . . 12
2.6 Technical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
2.7 Commission Regulation (EU) 2016/2281 from November 30, 2016 . . . . . 14
2.8 Air-side accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2.9 Accessories - flue gas pipework, gas distribution . . . . . . . . . . . . . . . . . . . 16
3 Shipping and storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
3.1 Shipping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
3.2 Shipping and handling of the unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
3.3 Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4 Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.1 Load-bearing capacity of the installation site . . . . . . . . . . . . . . . . . . . . . . 20
4.2 Ceiling installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.3 On-wall mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4.4 Safety clearance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
4.5 Unit mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
4.6 Mounting the flue gas pipework . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
4.7 Mounting examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
5 Electrical Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
5.1 Electric switch cabinet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
5.2 Connection diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
5.3 Multi Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
6 Gas Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
6.1 Gas distribution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
7 Commissioning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
7.1 Initial commissioning - information for service companies . . . . . . . . . . . . 36

MultiMAXX HG Table of Contents
FläktGroup DC-2011-0141-GB 2021-01/R7 • Subject to modifications5
8 Operation of the Gas Unit Heater . . . . . . . . . . . . . . . . . . . . . . . . 50
8.1 General operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50
8.2 Operation and adjustment of the units by means of the control
panel OSHG 0.EC0M (OSHG 0.000M) . . . . . . . . . . . . . . . . . . . . . . . . . . .50
8.3 Adjustment of the mixed-air module . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59
8.4 Adjustment of the secondary-air louvre . . . . . . . . . . . . . . . . . . . . . . . . . . .59
8.5 Differential pressure switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60
8.6 Decommissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60
9 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
9.1 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .61
9.2 Quarterly maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62
9.3 Semi-annual maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63
9.4 Annual maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .64
9.5 Breakdowns . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65
10 Disassembly and Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
10.1 Dismantling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .67
10.2 Recycling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .67
11 Warranty Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
11.1 Authorized service companies for warranty and repairs in Germany . . . .68
11.2 Warranty certificate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .69
– Original operation manual –
Copyright note
Disclosing, copying, distributing or taking any action in reliance on the contents of this document is strictly prohi-
bited without express prior consent. Violations entail liability for any damages or other liability arising. All rights in
relation to patents, utility patents or design patents are reserved.

Safety and User Information MultiMAXX HG
6FläktGroup DC-2011-0141-GB 2021-01/R7 • Subject to modifications
1 Safety and User Information
This is an original operation manual verified by the manufacturer.
MultiMAXX HG Air Heaters are developed and manufactured according to the current
state of technology and the approved safety-specific standards and directives and cor-
respond to the EC Directive on Machinery.
MultiMAXX HG Air Heaters are safe to operate and comply with high quality standards.
Future-oriented technology and pronounced operator and maintenance friendliness
were combined in this product series.
However, every unit heater can pose an unavoidable residual danger for the user or
third parties, or can lead to impairments of the units or other objects. For this reason,
it is important to observe the safety regulations without fail. The unit and its mainte-
nance must be carried out according to all prevailing regulations and standards.
Failure to follow the safety precautions could result in death, serious injury, environ-
mental damage and/or considerable property damage.
Observing the safety instructions in the current operation manual will help prevent
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 application of the operation manual
This operation manual provides critical information about the following:
–Shipping
– Mounting
– Installation
– Electrical connection
– Commissioning
–Operation
– Maintenance, cleaning and disposal
1.2 Icons used
The following icons are used to highlight specific text sections in this operation manual:
– Indicates text paragraphs
•Indicates process instructions
9Indicates work results
The following designations and icons are used in the operation manual for safety
instructions:
Notice!
Here you can find supplementary information on using the air heater
MultiMAXX HG and its economic handling.
Recycling!
This icon is used to highlight instructions on proper reuse of packaging material and
disused assembly groups (separated according to recyclable materials).
Danger of electrical current!
This icon indicates a risk of electrical shock that can result in serious injury, death
and material damage.
Risk of personal injury!
This icon indicates (different from the above-mentioned danger types) a hazardous
location with a risk of personal injury including death and material damage.

MultiMAXX HG Safety and User Information
FläktGroup DC-2011-0141-GB 2021-01/R7 • Subject to modifications7
1.3 Safety-conscious work procedures
Observe the following instructions during installation, configuration, repair and mainte-
nance tasks:
Fluctuations and imbalance in the mains supply voltage must not exceed tolerance lim-
its specified on the name plate; otherwise, this could cause severe unit malfunction,
overload states or failure.
Danger due to overhead loads!
This icon indicates a hazardous suspended load with a risk of personal injury includ-
ing death and material damage.
Danger of hot surfaces!
This section specifies procedures and precautions for preventing personal injury
resulting from contact with hot surfaces.
Danger of sharp cutting edges!
This section specifies procedures and precautions for preventing personal injury
resulting from cuts caused by sheet metal.
Risk of rotating components!
This symbol indicates hazardous rotating parts with a risk of personal injury includ-
ing death and material damage.
Environmental damage!
This icon warns about possible damage to the environment.
Danger of damage due to static discharge!
This icon precedes a warning of risks of damage to unit electronic components due
to static discharge.
Damage to the unit!
This icon indicates a hazardous location with a risk of material damage that can also
lead to personal injury.
Danger of accident due to gas explosion!
This section specifies particular information and prohibitions for avoiding personal
injury through gas explosions.
Danger of electrical current!
Disconnect the unit from the power supply and ensure the power cannot be inadver-
tently switched on, earth, short-circuit, and block off all neighboring live parts. Non-
compliance can lead to death or serious injury.
Risk of rotating components!
Danger of injury from rotating fan wheel! Before performing any work on the unit,
ensure that the unit is disconnected and powered down. Ensure that the unit is iso-
lated and secured against being energized at an appropriate point of the on-site
electrical power supply.
Danger of damage due to static discharge!
When connecting and/or adjustment work on the MultiMAXX air-handling unit, make
sure that you statically discharge yourself before touching PCBs and electrical com-
ponents.

Safety and User Information MultiMAXX HG
8FläktGroup DC-2011-0141-GB 2021-01/R7 • Subject to modifications
1.4 Proper use
The MultiMAXX air-handling units are used in industrial, warehouse, sales and exhibition
rooms, i.e., in areas which are protected against the influences of weather (including
mounting, temporary storage, and maintenance work). They serve for heating, ventilation
and filtration of the room/outdoor air.
In all areas which demand a room air-independent firing, the units are equipped with a
fresh-air supply (coaxial flue gas pipework can be optionally employed).
In all areas where there is the danger of negative pressure, it is absolutely necessary
to use units with a room-sealed model.
Filters, mixed-air modules, air intake plenums, mounting brackets, control units and control
elements can be supplied as accessories.
Proper use also includes observance of the operation manual and the maintenance and
care instructions prescribed 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.
1.5 Safety regulations and codes
For mounting the electrical connection and gas connection, commissioning, repair and
maintenance work with MultiMAXX air-handling units, observe the respective safety
regulations and standards which are valid in the respective countries and generally
recognized rules of technology.
1.6 Modifications and changes
Do not attempt to modify, add components, or convert the GEA MultiMAXX unit heater
in any way.
Changes or modifications of the heating unit will invalidate the CE conformity and ren-
der all warranty claims as null and void.
1.7 Spare parts
You must only use original FläktGroup spare parts, as FläktGroup is not liable for dam-
age caused by the use of third-party spare parts. You must only use original Fläkt-
Group spare parts, as FläktGroup is not liable for damage caused by the use of third-
party spare parts.
1.8 Selection and qualification of personnel
Risk of personal injury!
It is not permitted to operate MultiMAXX air heaters:
– 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
Notice!
Every person who works on the MultiMAXX unit heater must have completely read
and understood this entire operation manual.
Mounting/maintenance/repair may only be carried out by skilled staff observing
the valid regulations and standards.
Commissioning may only be carried out by specialists briefed in the prevailing
standards and regulations and who have installed the complete unit.
Electrical installation may only be carried out by skilled electricians observing the
valid regulations.
Gas installation may only be carried out by trained gas specialists observing the
valid regulations.
All skilled staff must be able to assess the work assigned to them, and recognize
and avoid all associated dangers.

MultiMAXX HG Specifications
FläktGroup DC-2011-0141-GB 2021-01/R7 • Subject to modifications9
2 Specifications
2.1 Unit configuration and packaged content
Fig. 2-1: Technical description MultiMAXX HG
Pos. 1a: Wide-blade fan (optional)
Pos. 1b: Sickle-blade fan (optional)
Pos. 2: Fan chamber with air inlet nozzle
Pos. 3: Electrical switch cabinet for Multi Operation (sheet steel)
Pos. 4: Coil
Pos. 5: Heat exchanger casing
Pos. 6: Reflection plates
Pos. 7: Flue pipe fitting on air-intake side
Pos. 8: Flue pipe fitting for smoke extract
Pos. 9: Gas burner
Pos. 10: Gas burner casing
Pos. 11: Outlet (optional)
Pos. 12: Thermal fuse
11
10
9
78
4
2
1b
1256
1a
3

Specifications MultiMAXX HG
10 FläktGroup DC-2011-0141-GB 2021-01/R7 • Subject to modifications
Various unit parts indicated in Fig. 2-1 are specified in detail as follows.
Wide-blade fan (Pos. 1a)
Axial fan with external-rotor motor and integrated contact protection grille, aluminum
wide blade, balanced by the manufacturer, maintenance-free with moisture proof
motor wired ready for connection in the cable box.
Protection class IP 54, thermal class F, external thermal contact,
in 2 models 400 V, 50 Hz and 2 models 230 V, 50 Hz.
Sickle-blade fan (Pos. 1b)
Axial fan with with AC or EC external rotor motor and integrated contact protection
grille. Sickle blade, balanced by the manufacturer, maintenance-free with moisture-
proof motor and wired to the cable box.
Protection class IP 54 thermal class F, external thermal contact,
400 V, 50 Hz and 230 V, 50 Hz.
Fan chamber with air inlet nozzle (Pos. 2)
The fan chamber is made of galvanized sheet steel and equipped with 8 x M8 nut serts
for the suspension of the unit.
Electrical switch cabinet for control system (pos. 3)
Sheet steel cable box contains controller PCB with terminal strip.
Coil (Pos. 4)
The coil is simple and robust, furnished with a combustion chamber and integrated
retractions, thereby ensuring optimal heat transfer between the combustion chamber
and the air to be warmed. The coil is made of high-temperature resistant steel.
Heat exchanger casing (pos. 5)
The coil casing is assembled by the manufacturer and made of galvanized sheet steel,
painted in RAL 7000.
Gas burner (Pos. 9)
The fully automatic gas-pressure burner provides for the temperature rise in the coil.
The burner can be used for the following gas configurations: natural gas, gas propane-
butane, only propane, and only butane.
Outlet (Pos. 11)
The diffusers direct the heated air in the desired direction.
2.2 Specification of material
Unit part Material
Fan with contact protection grille Aluminum-metal mix + diverse materials
Ventilator chamber Galvanized sheet steel
Electrical box made of galvanized sheet steel + different materials
Coil High-temperature resistant steel
Unit casing made of varnished sheet steel RAL 7000
Outlet The frame is made of galvanized painted sheet steel or galvanized sheet steel. The
blades are made of galvanized sheet steel or aluminum profiles
Gas burner Aluminum-metal mix + diverse materials
Tab. 2-1: Specification of material