FläktGroup MULTI FLAIR M 14 W0 Series User manual

MULTI FLAIR ®
OPERATION MANUAL

Multi Flair
2FläktGroup DC-2008-0402-GB 2021-10/R10 • Subject to amendment
Product range

Multi Flair
FläktGroup DC-2008-0402-GB 2021-10/R10 • Subject to amendment 3
Condensate drain / pump
0 = Without (only heating units)
A = With condensate drain (units with cooling)
P = With condensate pump (units with cooling)
Controller
IP20
A = MATRIX OP21C
B = MATRIX OP30C
C = MATRIX OP31C
d = MATRIX OP44C
E = MATRIX OP50C
F = MATRIX OP51C
U = MATRIX OP20C
IP54
G = MATRIX OP21I
H = MATRIX OP30I
I = MATRIX OP31I
L = MATRIX OP50I
M = MATRIX OP51I
Z = Without controller
Controls type
Control unit, controller
A = Stand-alone controller
C = Without controller
Slave unit
d = Without controller
Unit with
Z = Terminal block
Capacity stage
1 = Capacity stage 1
- 1 row, fin spacing 3 mm
2 = Capacity stage 2
- 1 row, fin spacing 2.1 mm
3 = Capacity stage 3
- 2 rows, fin spacing 3 mm
4 = Capacity stage 4
- 2 rows, fin spacing 2.1 mm
Multi Flair UNIT HEATER Controls package
Z
M 1 1 1 . U 0 W A G . B 0 5 I 3 . 0 0 1 . B A
Size
1 = Size 1
2 = Size 2
3 = Size 3
Air-flow function
U = Recirculating air
P = Primary air
Heating, cooling
Only Heating
0W = Heating water (PWW)
Cooling or Heating
WC = Cooling water (PKW)
Heating water (PWW)
only Cooling
W0 = Cooling water (PKW)
Coil connection, filter
Without filter
E = Connections from top
F Connections from side
with filter (only comfort design M1)
G = Connections from top
H = Connections from side
Electric motor / Speeds
Terminal block
B = AC motor, 400 V/3~/50 Hz, 2-speed
F = AC motor, 230 V/1~/50 Hz, 1-speed
G = EC motor, 230 V/1~/50 Hz, continuous
Control box for integrated controls
L = AC motor, 400 V/3~/50 Hz, 2-speed
P = AC motor, 230 V/1~/50 Hz, 3-speed
Y = EC motor, 230 V/1~/50 Hz, continuous
Colour
4 = Galvanized steel (only for standard model M2)
5 = White RAL 9010
9 = RAL selection
Controller type
2 = MATRIX 2000
3 = MATRIX 3000
Controller package No.
Unit Type
1 = Comfort version (with
designer grille)
2 = Standard (without de-
signer grille)
Heat exchanger type
A = Cu/Al
Electric motor version
AC motors
1AC = 1-speed, 230 V, 50 Hz
2AC = 2-speed, 400 V, 50 Hz
EC motors
1EC = continuous, 230 V, 50 Hz
Unit type
U = Recirculating
MC 4 U 1AC 000
or
Type code

Content Multi Flair
4FläktGroup DC-2008-0402-GB 2021-10/R10 • Subject to amendment
1 Safety and user instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.1 Operation manual scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.2 Symbols used . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.3 Safety instructions: warning messages and risk symbols . . . . . . . . . . . . . . 8
1.4 Safety at work . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
1.5 Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
1.6 Improper use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
1.7 Safety regulations and standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
1.8 Changes and modifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
1.9 Spare parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
1.10 Staff selection and professional qualifications . . . . . . . . . . . . . . . . . . . . . 11
2 Technical data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.1 Unit components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.2 Operational limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
2.2.1 Inlet medium temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
2.2.2 Unit and heat exchanger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
2.3 Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2.3.1 Basic unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2.4 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2.4.1 Unit weight, water volume in the heat exchanger and protection . 15
2.2.4 Electrical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
2.5 Condensate pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
2.5.1 Condensate drainage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
2.5.2 Condensate pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
2.6 Ecodesign Directive requirements pursuant to Commission Regulation
(EU) 2016/2281 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3 Transportation and storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
3.1 Transportation safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
3.2 Packed content . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
3.3 Packaging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
3.4 Transportation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
3.5 Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
3.6 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4 Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
4.1 Installation site . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
4.2 Installation of the unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
4.2.2 Removing corner guards. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
4.2.2 Installation to the ceiling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
4.2.3 Installation to the ceiling using threaded rods . . . . . . . . . . . . . . . . 25
4.2.4 Primary air connection (only for units with a primary air pipe
connection fitting) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
4.2.5 Designer cover installation (only in version M1) . . . . . . . . . . . . . . . 27
5 Hydraulic connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
5.1 General information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
5.2 Pipe connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
5.2.1 Installation example: Pipe connections from the top . . . . . . . 29
5.2.2 Installation example: Pipe connections from the side . . . . . . . . 29
5.2.3 Protection class / Water volume / Weight / Sound power level . . . 30

Multi Flair Content
FläktGroup DC-2008-0402-GB 2021-10/R10 • Subject to amendment 5
5.3 Condensate drainage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
5.3.1 Condensate drain connection for units with a condensate pump 31
5.3.2 Condensate drain connection for units without a condensate
pump. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
6 Electrical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
6.1 Wiring diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
6.2 Connections when used with controllers, MATRIX control systems or
control systems provided by site contractors . . . . . . . . . . . . . . . . . . . . . . .34
6.3 Overview of MATRIX boards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
6.3.1 Terminal block for units with AC-motors 230 V and 400 V . . . . . .35
6.3.2 Terminal block for units with EC-motors 230 V . . . . . . . . . . . . . . .36
6.3.3 MATRIX 2001 and MATRIX 3001 control system . . . . . . . . . . . . .37
6.3.4 Fan with upstream resistor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38
6.4. Controller installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39
6.5 Electrical connection of an external controller . . . . . . . . . . . . . . . . . . . . . .40
6.5.1 Terminal block connection for units with AC-motors 230 V . . . . . .40
6.5.2 Terminal block connection for units with AC-motors 400 V . . . . . .40
6.5.3 Terminal block connection for units with EC-motors 230 V . . . . . .41
6.5.4 Condensate pump connection . . . . . . . . . . . . . . . . . . . . . . . . . . . .41
6.5.5 Connecting several heater unit with 230 V AC motors to a single
controller 985.450 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
6.5.6 Connecting several heater unit with 230 V AC motors to a single
controller MC4U1AC.000 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43
6.5.7 Connecting several heater unit with 400 V AC motors to a single
controller 985.420 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44
6.5.8 Connecting several heater unit with 400 V AC motors to a single
controller MC4U2AC.000 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45
6.5.9 Connecting several heater unit with 230 V EC motors to a single
controller MC4U1EC.000 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46
6.5.10 Connecting several heater unit with 230 V EC motors to a single
potentiometer 950EC1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47
6.6 Electrical connections with MATRIX . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48
6.6.1 Connecting power supply in units with a controller . . . . . . . . . . . .48
6.6.2 Connecting control cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49
6.6.3 Connecting bus cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52
6.6.4 Connecting an outside temperature sensor (optional) . . . . . . . . . .53
6.6.5 Connecting a supply air temperature sensor (optional) . . . . . . . . .53
6.6.6 Connecting a room temperature sensor (optional) . . . . . . . . . . . .54
6.6.7 Connecting an operational and error message system . . . . . . . .54
6.6.8 Connecting a functional input . . . . . . . . . . . . . . . . . . . . . . . . . . . .54
6.6.9 Connecting 230 V valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55
6.7 MATRIX.Net network and connecting shielding . . . . . . . . . . . . . . . . . . . . .56
6.7.1 Group structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56
6.7.2 MATRIX.Net network structure . . . . . . . . . . . . . . . . . . . . . . . . . . .59
6.7.3 MATRIX.Net network topology . . . . . . . . . . . . . . . . . . . . . . . . . . .60
6.7.4 Line structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60
6.7.5 Line structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .61
6.7.6 Building MATRIX.Net network . . . . . . . . . . . . . . . . . . . . . . . . . . . .62
6.7.6 Shielding / earthing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62
7 Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
7.1 Safety test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63
7.1.1 Pre-commissioning checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63

Content Multi Flair
6FläktGroup DC-2008-0402-GB 2021-10/R10 • Subject to amendment
7.1.2 Before commissioning the following checks must be carried out: 63
7.1.3 Setting secondary air fins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
7.1.4 Following commissioning: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
7.2 Bleeding the heat exchanger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
7. 3 Condensate pump check (only in cooling) . . . . . . . . . . . . . . . . . . . . . . . 65
7.3.1 Condensate pump test run . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
7.4 Terminating resistors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
7.5 Setting addresses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
7.6 Starting the unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
7.7 Data connection check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
7.7.1 Checking control cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
7.7.2 Checking data cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
7.8 Checking control inputs and outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
7.8.1 Functional input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
7.9 Functions when used with the MATRIX control system . . . . . . . . . . . . . . 73
7.9.1 Fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
7.9.2 Valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
7.9.3 Condensate pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
7.9.4 Standby mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
7.9.5 Indoor frost protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
7.9.6 Summer / winter compensation . . . . . . . . . . . . . . . . . . . . . . . . . . 74
7.9.7 Filter replacement indication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
8 Maintenance and troubleshooting . . . . . . . . . . . . . . . . . . . . . . . 75
8.1 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
8.2 Regular maintenance interval schedule . . . . . . . . . . . . . . . . . . . . . . . . . . 75
8.3 Quarterly maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
8.3.1 Filter cleaning / replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
8.4 Annual maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
8.4.1 Heat exchanger cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
8.4.2 Checking hydraulic threaded connections . . . . . . . . . . . . . . . . . . 77
8.4.3 Condensate pump test run . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
8.4.4 Checking electrical cables and earthing . . . . . . . . . . . . . . . . . . . . 77
8.4.5 Heat exchanger bleed check . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
8.4.6 Condensate pan and condensate pump cover cleaning . . . . . . . . 78
8.5 Before cooling period . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
8.5.1 Condensate pump performance test . . . . . . . . . . . . . . . . . . . . . . 79
8.6 Filter retrofitting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
8.7 Operational faults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
EC Declaration of conformity . . . . . . . . . . . . . . . . . . . . . . . . . . 83
Safeguard clause
Distributing and copying of this document, its sale and the disclosure of its content is strictly prohibited without express
prior consent. Any violation of this clause results in liability for damages. All rights in relation to patent, utility model or
industrial design registration are reserved.

Multi Flair Safety and user instructions
FläktGroup DC-2008-0402-GB 2021-10/R10 • Subject to amendment 7
1 Safety and user instructions
This is the original operation manual verified by the manufacturer.
Multi Flair unit heaters are developed and manufactured using state-of-the-art techno-
logy in accordance with the standards and regulations of the EU and CZ.
Multi Flair unit heaters are safe and comply with high quality standards. This product
range combines technical perfection with ease of use and maintenance.
Nevertheless, individual units may pose a risk to the user or third parties, may break
down or cause other damage. For this reason, safety regulations must be observed at
all times. Units must be operated and maintained in compliance with regulations and
standards; failure to do so could lead to injury, damage or environmental impact.
Observing the safety instructions in this operation manual will help avoid these risks,
and ensure economical operation of the unit and the full benefit of its use.
The safety aspects covered by this chapter apply to the entire Multi Flair unit heater
operation manual.
1.1 Operation manual scope
The operation manual includes necessary information related to the following areas:
– Transportation
– Fitting
– Installation
– Power supply connection
– Commissioning
– Operation
– Maintenance, cleaning and disposal
1.2 Symbols
The text of this operation manual uses the following symbols:
– Symbol for a new paragraph
•Symbol for Instructions to follow
Symbol for the result of an action
Attention!
This symbol indicates additional information on Multi Flair unit heaters and their
accessories.
Recycling!
This symbol indicates information on handling packing material and used machine
parts (classified according to the type of material used).

Safety and user instructions Multi Flair
8FläktGroup DC-2008-0402-GB 2021-10/R10 • Subject to amendment
1.3 Safety instructions: warning messages and risk symbols
All information in this chapter is important and relevant to your safety. Therefore, not
all information included in this chapter is highlighted using special warning symbols.
Safety instructions in the following chapters of this operation manual are indicated by
pictograms. General safety instructions are listed at the beginning of each chapter and
special safety instructions on specific process steps are listed along with these steps.
The following warnings are used:
Risk of electrocution!
This symbol indicates activities with an inherent risk of electrocution.
Risk of scalding!
This symbol indicates warnings, commands and prohibitions which, if not observed,
may lead to personal injury and damage caused by hot heating fluids.
Risk of injury from rotating mechanical parts!
This symbol indicates warnings, commands and prohibitions which, if not observed,
may lead to personal injury and damage caused by rotating parts of the unit or its
accessories.
Risk of injury from suspended loads!
This symbol indicates a risk of injury and damage due to suspended loads.
Personal injury!
This symbol indicates warnings, commands and prohibitions which, if not observed,
may lead to personal injury and damage to the unit and property.
Damage to the unit!
This symbol indicates warnings, commands and prohibitions which, if not observed,
may lead to damage to the unit and its accessories and control system.
Damage to the environment!
This symbol indicates a risk of damage to the environment or provides information
on environmental protection regulations.

Multi Flair Safety and user instructions
FläktGroup DC-2008-0402-GB 2021-10/R10 • Subject to amendment 9
1.4 Safety at work
To ensure your own safety, comply with the following safety instructions:
1.5 Use
Multi Flair unit heaters are installed in industrial, storage, retail and exhibition premises,
i.e. in a standard environment according to CSN 33 2000-1 ed. 2 and
CSN EN 60 721-3-3, and are used for air heating, cooling or filtration.
The unit must be used pursuant to Commission Regulation (EU) No. 1253/2014.
This Multi Flair operation manual must be observed in order to ensure the proper use
of the units.
Water or a water/glycol solution may be used as a medium (max. solution concentra-
tion 50%).
The following limit values apply for use with Cu/Al heat exchangers:
Risk of electrocution!
Before commencing any work on the unit, disconnect the unit from the power supply
and secure it against reconnection. (Check that the unit is not live, earth it and short-
circuit conducting parts. Failure could lead to serious injury or death.)
Risk of scalding!
Shut off the fluid supply before commencing any work on the valves or the inlet and
outlet heating / cooling pipework. To prevent injury by scalding or burning, do not
start any work on the unit until the heating fluid has cooled down.
Risk of injury from rotating mechanical parts!
There is a risk of injury from rotating mechanical parts! Before commencing any
work, disconnect the unit from the power supply. Ensure that the unit cannot be
reconnected by securing the on-site power supply.
Risk of injury from suspended loads!
Wear protective gear, i.e. a hard hat and safety boots to prevent injury from falling
components when installing the unit to the ceiling. Ceiling installation should always
be performed by two persons!
Personal injury!
When handling the unit wear gloves, safety boots and protective clothing.
Parameter Unit with Value
pH value (at 20°C) 7.5 - 9
Conductivity (at 20°C) mS/cm < 700
Oxygen content O2mg/l < 0.1
Total hardness °dH 1 - 15
Dissolved sulphur S Not detectable
Sodium Na+mg/l < 100
Iron Fe2+, Fe3+ mg/l < 0.1
Manganese Mn2+ mg/l < 0.05
Ammonium NH4+mg/l < 0.1
Chloride Cl-mg/l < 100
Sulphate SO42- mg/l < 50
Nitrite NO2-mg/l < 50
Nitrate NO3-mg/l < 50
Tab. 1-1: Limit values for media in closed cooling and heating circuits

Safety and user instructions Multi Flair
10 FläktGroup DC-2008-0402-GB 2021-10/R10 • Subject to amendment
The following limit values apply for Cu/Al heat exchangers:
Multi Flair unit heaters may only be used indoors.
Multi Flair unit heaters are designed for ceiling installation.
1.6 Improper use
The unit heaters Multi Flair must not be operated:
– in areas with a risk of explosion,
– in humid areas,
– in excessively dusty areas or areas with corrosive air.
1.7 Safety regulations and standards
When carrying out the installation, commissioning, maintenance and servicing of Multi
Flair unit heaters, all local safety regulations and codes, as well as generally establis-
hed technical practices, must be followed.
•CSN 33 1310 ed. 2 Electric regulations. Safety regulations for electrical
equipment destined for use by persons with no
electrotechnical qualifications.
•CSN 33 2000-1 ed. 2 Low-voltage electrical installations – Part 1: Fundamental
principles, assessment of general characteristics, definitions
•CSN 06 1008 Fire protection of heating appliances.
•CSN EN 13501-1+A1 Fire classification of construction products and building
elements – Part 1: Classification using test data from
reaction to fire tests.
Parameter Unit with Value
Max. operating temperature °C 90
Min. cooling temperature (when used with a MA-
TRIX control system and valves) °C 6
Max. operating pressure MPa (bar) 1.6 (16)
Max. intake air temperature °C 40
Tab. 1-2: Limit values for Cu/Al heat exchangers
Damage to the unit!
In open systems (e.g. when using water from a well, observe the limit values from
tab. 1-1) it is necessary to remove contaminants from the water using an inlet filter.
Otherwise, there is a risk of corrosion due to deposits.
In addition, ensure that the unit is protected from dust and other substances which,
in conjunction with water, result in an acidic or alkaline reaction (aluminium corro-
sion).
Attention!
Any use other than or beyond the above is considered improper use.
The manufacturer / supplier is not liable for any resulting damage as this risk is
borne solely by the user.
Proper use is the responsibility of the user.
Proper use also includes compliance with the operation manual and the inspection
and maintenance conditions stipulated by FläktGroup.
Personal injury!
Improper use of the unit may lead to personal injury and damage to property.

Multi Flair Safety and user instructions
FläktGroup DC-2008-0402-GB 2021-10/R10 • Subject to amendment 11
1.8 Changes and modifications
No changes or modifications may be made to Multi Flair unit heaters or their compo-
nents.
Changes or modifications to Multi Flair units will invalidate the declaration of conformity
and render all warranty claims null and void.
1.9 Spare parts
Only original spare parts are allowed to be used. The producer is not liable for any
damage or injury if third-party spare parts are used.
1.10 Staff selection and professional qualifications
Attention!
Each person assigned to work on Multi Flair unit heaters must read and fully under-
stand this operation manual.
Installation / commissioning / maintenance / repairs: Only by trained and competent
HVAC personnel.
Electrical installation: Only by trained electrical engineering personnel with compe-
tent pursuant to Section 6 of Regulations CUBP and CBU No.50/78 Coll.
All professionals must be able to evaluate the work they have been assigned and
recognize and prevent any risks.

Technical data Multi Flair
12 FläktGroup DC-2008-0402-GB 2021-10/R10 • Subject to amendment
2 Technical data
2.1 Unit components
Pos. 1: Ceiling plate
Pos. 2: Control electronics
Pos. 3: Primary air supply connection
Pos. 4: Corner guards (4 pieces)
Pos. 5: Condensate pump – cooling (accessories)
Pos. 6: 4-sided secondary air fin
Pos. 7: MATRIX control board
Pos. 8: Terminal block
Pos. 9: Circular heat exchanger
Pos. 10: Condensate pan with drainage
Pos. 11: Base plate
Pos. 12: Condensate pump cover
Pos. 13: Axial fan with AC or EC-motor with external
rotor
Pos. 14: Fan protection grille
Pos. 15: Filter cassette with 2 guide rails (only with M1
unit models)
Pos. 16: Filter covers (only with M1 unit models)
Pos. 17: Designer cover (only with M1 unit models)
Fig. 2-1: Components of Multi Flair unit heaters
3
4
5
10
11
15
17
7
8
9
12
13
14
16
6
1
2

Multi Flair Technical data
FläktGroup DC-2008-0402-GB 2021-10/R10 • Subject to amendment 13
Some of the unit components from fig. 2-1 are described in detail below:
Ceiling plate (pos. 1)
Ceiling plate with primary air connection and air impact deflector
Control electronics (pos. 2)
– at 230 V with upstream resistor
– at 400 V with MATRIX control board
Corner guards (4 pieces) (pos. 4)
Corner guards are fitted on the unit.
Condensate pump – cooling (accessories) (pos. 5)
The condensate pump drains condensate from the condensate pan into upstream col-
lection or sewer systems.
MATRIX control board (pos. 7)
On 230 V unit models, the controller PCB is fitted here.
Terminal block (pos. 8)
Connection of the unit’s power supply 230 V / 400 V.
Circular heat exchanger (pos. 9)
The chilled and warm water heat exchanger is equipped with R 3/4" female connection
fittings and a bleed valve.
Condensate pan with drainage (pos. 10)
The condensate pan is designed for the collection and drainage of condensate.
Base plate (pos. 11)
A base plate with a type identification label.
Condensate pump cover (pos. 12)
Condensate captured in the condensate pan is collected in the pump cover (only with
cooling units).
Axial fan with AC or EC-motor with external rotor (pos. 13)
The axial fan consists of an AC or EC motor with an external rotor and flat blade impel-
ler. The electric motor is protected using integrated thermal contacts.
Filter cassette with 2 guide rails (only with M1 unit models) (pos. 15)
The guide rail is separated in the condensate pan space.

Technical data Multi Flair
14 FläktGroup DC-2008-0402-GB 2021-10/R10 • Subject to amendment
2.2 Operational limits
2.2.1 Inlet medium temperature
To prevent the temperature from falling below the dew point and the formation of con-
densate on non-insulated parts of the unit in cooling mode, the specific minimum inlet
temperature or evaporating temperature limits must not be exceeded. These depend
on room temperature and relative humidity and are specified in the following diagram.
2.2.2 Unit and heat exchanger
Fig. 2-2: Minimum permitted inlet medium temperature Air pressure = 1,013 hPa;  = relative
humidity
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
22 24 26 28 30 32 34 36 38 40
ϕ = 85

ϕ = 80
ϕ = 75
ϕ = 70
ϕ = 65
ϕ = 60
ϕ = 55
ϕ = 50
ϕ = 45
ϕ = 40
Inlet (cooling) medium temperature [°C]
Room temperature [°C]
Unit and heat exchanger Value
Max. operating pressure / temperature 1.6 MPa (16 bar) / 90°C
Max. permitted ambient temperature 40°C
Min. permitted ambient temperature 2°C
Operating voltage 230 V AC, 50 Hz or 400 V AC
Power input / current See the type label
Max. discharge air temperature 75°C (risk of scalding)
Min. primary air temperature 7°C
Tab. 2-1: Operational limits for the unit and heat exchanger

Multi Flair Technical data
FläktGroup DC-2008-0402-GB 2021-10/R10 • Subject to amendment 15
2.3 Dimensions
2.3.1 Basic unit
2.4 Technical data
2.4.1 Unit weight, water volume in the heat exchanger and protection
Fig. 2-3: Basic unit dimensions
Size Dimensions (mm)
B H HSa1 • b1x Ø D F
1729 328 296 900 • 800 120 150 613
2830 395 301/355* 1000 • 900 120 180 713
3930 415 310/360* 1100 • 985 120 200 813
Tab. 2-2: Basic unit dimensions; depending on structural dimensions HS unit in “Standard”
F configuration fixing point spacing
* applies to EC-motor
Size 123
Protection IP20 IP20 IP20
Protection class I I I
Water volume in the heat
exchanger CR1,2 / CR3/4 [l] 1.2 / 2.2 1.5 / 2.6 1.7 / 3.2
Weight: Unit / designer cover [kg] 39.5 / 3.5 47.5 / 4.2 58.5 / 5.2
Tab. 2-3: Unit weight, water volume in the heat exchanger and protection
(CR... capacity range)

Technical data Multi Flair
16 FläktGroup DC-2008-0402-GB 2021-10/R10 • Subject to amendment
2.4.2 Electrical data
Tab. 2-4: Electrical values of AC and EC-motor fans
* Sound pressure level: The value in the table is the sound pressure level in dB(A) of an unloaded unit in a room with average reference
characteristics, at a distance of 3 metres from the unit. Absorption surface 200 m2 Sabin, heat radiation hemisphere = directional
factor 2.
** Values apply for the minimum and maximum permissible control voltage of the EC-motor
Size Speed levels Speed [rpm] Sound power level
[dB(A)]
Sound pressure level*
[dB(A)]
Max. power
input [kW] Max. current [A]
AC-motor, 1 ~ 230 V, 1-speed
1 1 920 66 52 0.09 0.48
2 1 865 68 54 0.14 0.68
3 1 910 75 61 0.29 1.25
EC-motor, 1~230 V, continuous**
1min. 468 40 36 0.01 0.10
max. 1056 65 61 0.06 0.51
2min. 276 34 30 0.01 0.04
max. 862 68 64 0.11 0.53
3min. 290 47 32 0.02 0.29
max. 680 65 51 0.15 0.72
AC-motor, 1 ~ 230 V, 3-speed
1
1 480 50 36
0.09 0.482 680 59 45
3 850 64 50
2
1 325 45 31
0.14 0.682 415 50 36
3 610 59 45
3
1 410 57 43
0.29 1.252 490 62 47
3 620 65 51
AC-motor, 3 ~ 400 V, 2-speed
11 770 61 47 0.08 0.19
2 920 66 53
21 600 63 49 0.12 0.28
2 830 69 55
31 500 60 46 0.13 0.29
2 660 67 53

Multi Flair Technical data
FläktGroup DC-2008-0402-GB 2021-10/R10 • Subject to amendment 17
2.5 Condensate pump
In cooling units, condensate may form which is collected in the condensate pan. The
condensate pump drains condensate into drainage and sewage pipework located
upstream.
2.5.1 Condensate drainage
The condensate pump has a float switch with the following functions:
– It activates the pump when the pre-set water level in the condensate pan has been
exceeded.
– It switches the pump off if the condensate level falls below the minimum water level.
– It activates an alarm if the maximum permitted water level has been exceeded.
2.5.2 Condensate pump
•The maximum operating pressure of the pump is 0.1 MPa (1 bar); the maximum
water flow rate is 10 l/h. fig. 2-5 shows the pump’s capacity in l/h in relation to the
delivery head.
Condensate pump technical data
Pos. 1: Pump control (SKP)
Pos. 2: Condensate pump
Pos. 3: Float switch
Pos. 4: Condensate pump cover
Fig. 2-4: Condensate pump (accessories)
1
2
3
4
Product data Value
Operating voltage 230 V AC / 50 Hz
Current max. 0.2 A
Power input 55 W
Max. pump head 1.3 m
Max. water flow rate 60 l/h
Sound power level at H = 0 m 45 dB(A)
at H = 4 m 46 dB(A)
Tab. 2-5: Condensate pump technical data

Technical data Multi Flair
18 FläktGroup DC-2008-0402-GB 2021-10/R10 • Subject to amendment
Condensate pump capacity
Fig. 2-5: Condensate pump cover
0
1,40
1,30
1,20
1,10
1,00
0,90
0,80
0,70
0,60
0,50
0,55
0,65
0,75
0,85
0,95
1,05
1,15
1,25
1,35
10 20 30 40 50 60 70
Flow rate Q [l/h]
Head [m]
Applies to:
– Inner hose diameter: 6 mm
– Inner hose fitting diameter: 4.5 mm
– Line resistance considered in the
curve: 1 non-return valve, 1 hose fit-
ting,
1 90° elbow, outside of the unit: 1
hose fitting to connect the external
line on site
– Pressure increase: from the pump’s
suction point
Hose length 5.0 m
Hose length 2.5 m

Multi Flair Technical data
FläktGroup DC-2008-0402-GB 2021-10/R10 • Subject to amendment 19
2.6 Ecodesign Directive requirements pursuant to Commission Regulation (EU) 2016/
2281
The values specified in tab. 2-6 are in accordance with the requirements of Commis-
sion Regulation (EU) 2016/2281, implementing Directive 2009/125/EC of the Euro-
pean Parliament and of the Council establishing a framework for the setting of
ecodesign requirements for energy-related products, with regard to ecodesign require-
ments for air heating products, cooling products, high temperature process chillers and
fan coil units.
Size
Unit code
Electric motor version Fan speed levels Total cooling capacity Cooling capacity (sensible) Cooling capacity (latent) Heat energy consumption Total electrical power consumption Volume flow rate Sound power level
Prated,c
[kW]
Prated,c
[kW]
Prated,c
[kW]
Prated,h
[kW]
Pelec
[kW]
V
[m3/h]
LWA
[dB(A)]
1
M#14.#W0(0W)# AC 1 3.1 2.9 0.2 4.5 0.009 820 50
2 4.1 3.7 0.4 5.7 0.009 1,160 59
3 4.7 4.3 0.4 6.6 0.009 1,450 64
M#14.#W0(0W)#. EC min. 3.1 2.9 0.2 4.6 0.01 825 41
max. 5.4 5.0 0.4 7.6 0.057 1,840 66
2M#24.#W0(0W)# AC 1 4.6 3.7 0.9 5.4 0.14 890 46
2 5.4 4.5 0.9 6.4 0.14 1,160 50
3 6.8 5.8 1.0 8.4 0.14 1,740 60
M#24.#W0(0W)# EC min. 4.7 3.9 0.8 5.6 0.01 940 36
max. 9.0 8.0 1.0 11.5 0.11 3,010 70
3M#34.#W0(0W)#. AC 1 7.9 6.4 1.5 9.0 0.29 1,700 56
2 8.9 7.4 1.5 10.4 0.29 2,130 61
3 10.5 8.9 1.6 12.6 0.29 2,920 66
M#34.#W0(0W)#. EC min. 5.6 4.4 1.2 6.2 0.021 970 43
max. 11.5 10.0 1.5 14.3 0.151 3,590 66
Tab. 2-6: Values in accordance with Commission Regulation (EU) 2016/2281 (the values apply to: 2-pipe system – thermal output
at PWW 45/40°C, air intake +20°C/50% r.h., cooling capacity at PWW 7/12°C, air intake 27°C/50% r.h.)
The values apply to units without filter.

Transportation and storage Multi Flair
20 FläktGroup DC-2008-0402-GB 2021-10/R10 • Subject to amendment
3 Transportation and storage
3.1 Transportation safety
3.2 Scope of delivery
Immediately upon receipt, remove the packaging and inspect the unit to determine if
any damage has occurred during shipment (if any damage is found, immediately report
a complaint to the shipping company) and check that the scope of delivery is complete
and correct. To do that, compare data on the type label with the delivery note.
This also applies to all accessories. Missing parts (quantities) or damage caused
during transportation can only be dealt with through shipping insurance if the damage
has been confirmed by the shipping company.
3.3 Packaging
Multi Flair unit heaters are delivered in firm shipping cardboard.
3.4 Transportation
Risk of injury from suspended loads!
Standing underneath suspended loads may pose a risk to life.
•Make sure that there are no people standing underneath suspended loads.
Damage to the unit!
Improper use may lead to damage to the Multi Flair unit heater.
•If damage has been caused due to impact or the unit falling, carefully check it
for proper function and power input.
•Transport Multi Flair unit heaters with care!
Personal injury!
•Wear safety gloves to prevent injury caused by sharp edges.
•Multi Flair units should be handled by at least two people to prevent any injury.
•When delivering on pallets, they can be handled only by forklift trucks and
transport vehicles with sufficient load-bearing capacity.
•Secure the load during transit to prevent it from falling / tipping over.