FRÄNKISCHE profi-air 250/360 flex User manual

AUTO
AUTO
Linksversion(A)
Leftunit
unitásinistra
Versiongauche
profi-air®250/360 flex
Installation and operating instructions
Building Technology
www.fraenkische.com

Installation and operating instructions profi-air 250/360 flex
2
Table of contents
1 General information 4
1.1 Introduction 4
1.2 Safety 4
1.3 Intended use 5
1.4 EC conformity 5
2 Technical design 6
2.1 Dimensions of the
profi-air 250/360 flex ventilation unit 6
2.2 Structure and components of the profi-air
250/360 flex ventilation unit 7
2.3 profi-air 250/360 flex control board 10
3 profi-air 250/360 flex
installation 11
3.1 Transport and unpacking 11
3.2 Checking the scope of delivery 11
3.3 Requirements for the installation room 11
3.4 Available and/or optional accessories /
replacement filters 12
3.5 Electric connection options 13
3.6 Installation options and fastening of units 13
3.7 Air connections 18
3.8 Condensate drain 21
3.9 Electric connection 24
3.10 Optional operating options 24
3.11 Central VOC sensor 30
3.12 Central humidity sensor 34
3.13 Defroster heater 37
3.14 Connection box 42
3.15 Room humidistat 42
3.16 Silencer 43
3.17 Enthalpy heat exchanger 43
3.18 cockpit pro connection cable 45
3.19 Optional replacement filter set G4 / F7
(ISO Coarse 75% / ePM1 55%) 45
4 Commissioning and operation
of profi-air 250/360 flex 46
4.1 Dierent control options 46
4.2 Commissioning / adjustment of
profi-air 250/360 flex 49
4.3 Operation of profi-air 250/360 flex
with control panel / profi-air cockpit app 58
5 Factory settings and setting
ranges of control units 66

Installation and operating instructions profi-air 250/360 flex 3
Table of contents
All information provided in this publication is generally up to date at the time of printing. Moreover, this publication was prepared with the greatest possible care. However, we cannot rule out
printing errors or translation mistakes. Furthermore, we reserve the right to change products, specifications and other information, or changes may be necessary due to legal, material or other
technical requirements, which no longer could be considered for this publication. For this reason, we are unable to accept any liability if this is based solely on the information contained in this
publication. Instrumental in connection with information about products or services are always the purchase order, the concrete product purchased and the related documentation or the
information provided by our specialist staff in the specific case.
6 Control strategies 67
6.1 Weekly programme 67
6.2 Automatic mode 71
6.3 Automatic summer bypass 71
6.4 Frost protection of the heat exchanger 72
7 Servicing and maintenance 73
7.1 Filter replacement 73
7.2 Maintenance information for specialists 75
8 Faults 79
8.1 Fault reports 79
8.2 Fault clearance 80
8.3 Faults (or problems) without reports 86
9 Technical data 89
9.1 Data sheet 89
9.2 Airflow performance diagram 90
9.3 Pressure loss increase filter
ePM1 55% (F7) 91
9.4 Temperature eciency
performance diagram 92
9.5 Sound data 93
9.6 Terminal diagram 96
10 Product data sheets according
to the ErP directive 98
10.1 profi-air 250/360 flex 98
10.2 profi-air 250/360 flex ventilation unit
with external sensors 99
10.3 profi-air 360 flex 100
10.4 profi-air 360 flex ventilation unit
with external sensors 101
11 EC Declaration of Conformity 102
12 Warranty and liability 103
12.1 Warranty 103
12.2 Liability 103
13 Disposal 103

Installation and operating instructions profi-air 250/360 flex
4
1 General information
Ventilation units from the FRÄNKISCHE profi-air product
range constitute an important part of a heat recovery ventila-
tion system. They bring the required volume of supply air to
and take extract air from rooms.
With the help of an integrated plastic cross-flow heat exchang-
er, these ventilation units provide high heat recovery eciency.
These installation and operating instructions are intended to
help you install a fully functional profi-air 250/360 flex ventila-
tion unit and properly operate it. We therefore recommend
that you read these instructions carefully before you carry out
Even if the fresh air temperature is around the freezing point,
the supply air is heated virtually to the room temperature.
All profi-air ventilation units are fitted with fully automatic sum-
mer bypass flaps in order to prevent undesired heating of the
fresh air during transitional seasons.
1.1 Introduction
any activities on the unit or make any settings on the unit.
These installation and operating instructions can also serve as
a reference for service and maintenance work and guarantee
smooth and ecient operation.
If used as intended, the unit is safe and reliable to operate.
The construction and design are state of the art and comply
with all relevant DIN / VDE regulations and safety provisions.
All safety regulations, warnings and notes of these installation
1.2 Safety
and operating instructions have to be observed; non-obser-
vance might result in personal injury and/or damage to profi-air
250/360 flex.
1.2.1 Safety regulations
nInstallation, connection, commissioning as well as maintenance of profi-air 250/360 flex may be performed by authorised
and qualified personnel only (with the exception of filter replacements).
nInstallation of profi-air 250/360 flex is to be carried out according to the applicable local construction, safety and installation
regulations.
nNon-authorised changes or modifications of profi-air 250/360 flex are not allowed.
nInstructions regarding regular filter replacement are to be strictly adhered to.
nKeep these installation and operating instructions near the ventilation unit during the entire life of profi-air 250/360 flex.
1.2.2 Safety equipment and measures
nThe profi-air 250/360 flex unit cannot be opened without tools.
nMake sure that the fans cannot be touched with hands as long as the system is connected to the power grid.
nIn case of maintenance, the device may therefore be opened in the “dead” state only, and profi-air 250/360 flex may only be
operated with the installed duct network.

Installation and operating instructions profi-air 250/360 flex 5
1.2.3 Symbols used
Risk of personal injury
Risk of:
nDamage to equipment
nErrors while operating the device if the instructions are not followed correctly
nOther material damage
Additional notes
Reference to other sections and/or guidelines of the manufacturer
Disposal instructions
The profi-air 250/360 flex ventilation unit has been designed
and constructed for the use in heat recovery ventilation and is
solely intended for this application. When using heat recovery
ventilation, stale,
moist and smelly air is removed from the bath-
1.3 Intended use
room , toilet, kitchen and utility rooms to be replaced with the
same amount of fresh air in the living room, bedroom and
children's room. Overflow outlets provide sound and well-
balanced air circulation in the housing unit.
Please ensure that the overflow outlets are not blocked or covered in order not to impede proper functioning
of the system.
Operation of profi-air 250/360 flex during the building drying stage is inappropriate in terms of its intended
use.
The profi-air 250/360 flex ventilation unit bears the CE marking.
1.4 EC conformity
See Section 11 for the EC Declaration of Conformity.

AUTO
313,5
540
1056
562
45
265
186
Ø 160
Ø 160
346
143
425
150
AUTO
313,5
540
1056
562
45
265
186
Ø 160
Ø 160
346
143
425
150
AUTO
313,5
540
1056
562
45
265
186
Ø 160
Ø 160
346
143
425
150
Installation and operating instructions profi-air 250/360 flex
6
2 Technical design
2.1 Dimensions of the profi-air 250/360 flex ventilation unit
Top view
Front view
Bottom view

AUTOAUTO
AUTO
AUTO
Installation and operating instructions profi-air 250/360 flex 7
2.2 Structure and components of the profi-air 250/360 flex ventilation unit
2.2.1 Structure and components, outside
Number Operating mode A (delivery condition) Operating mode B
1Supply air connection opening DN 160 Exhaust air connection opening DN 160
2Exhaust air connection opening DN 160 Supply air connection opening DN 160
3Fresh air connection opening DN 160 Extract air connection opening DN 160
4Extract air connection opening DN 160 Fresh air connection opening DN 160
5Cable feed-throughs Cable feed-throughs
6 – Alternative supply air connection DN 160
7Alternative supply air connection DN 160 –
8–Condensate drain
9Condensate drain –
10 Control unit Control unit
11 Filter cover Filter cover
10
11
1
2
3
4
5
6
7
8
9

P3 P1
P2 P4
A B
P1 P2 [Pa] [m3]
[Pa] [m3]
Einstellwerte/ Calibration / Calibrazione
0
100
80
60
40
20
90
70
50
30
10
0
10050 200150 300250 350
[m3/h]
[Pa]
Airflow
P3 P4
AUTO
Installation and operating instructions profi-air 250/360 flex
8
2.2.2 Structure and components, inside
Number Operating mode A (delivery condition) Operating mode B
1USB connection (connection between laptop and VU) USB connection (connection between laptop and VU)
2Control unit Control unit
3Extract air filter ISO Coarse 75% (G4) Supply air filter ISO Coarse 75% (G4), optional ePM1 55%
(F7)
4Extract air fan cover Fresh air fan cover
5Control board cover Control board cover
6 – Defroster heater installation location marking
7Pressure tap P3 (extract air) Pressure tap P1 (fresh air)
8Pressure tap P2 (supply air) Pressure tap P4 (exhaust air)
9Supply air filter ISO Coarse 75% (G4), optional ePM1 55%
(F7) Extract air filter ISO Coarse 75% (G4)
10 Fresh air fan cover Extract air fan cover
11 Defroster heater installation location marking –
12 Pressure tap P1 (fresh air) Pressure tap P3 (extract air)
13
Pressure loss diagram heat exchanger Pressure loss diagram heat exchanger
14
Heat exchanger cover Heat exchanger cover
15
Pressure tap P4 (exhaust air) Pressure tap P2 (supply air)
1
2
3
4
5
6
7
8
9
10
11
12
15
13
14

P3 P1
P2 P4
A B
P1 P2 [Pa] [m3]
[Pa] [m3]
Einstellwerte/ Calibration / Calibrazione
0
100
80
60
40
20
90
70
50
30
10
0
10050 200150 300250 350
[m3/h]
[Pa]
Airflow
P3 P4
AUTO
Installation and operating instructions profi-air 250/360 flex 9
2.2.3 Sensor positions
Name Operating mode A (delivery condition) Operating mode B
S1 T1 fresh air temperature sensor T3 extract air temperature sensor
S2 T2 supply air temperature sensor T4 exhaust air temperature sensor
S3 T3 extract air temperature sensor T1 fresh air temperature sensor
S4 T4 exhaust air temperature sensor T2 supply air temperature sensor
AOptional humidity and/or VOC sensor –
B – Optional humidity and/or VOC sensor
S3
A
S1
B
S4
S2

Installation and operating instructions profi-air 250/360 flex
10
2.3 profi-air 250/360 flex control board
Number Description
1Network connection (connection for on-site router)
2Modbus interface (connection for external control panel or profi-air connection box)
3Antenna connection
4Digital signal input (can be programmed using the profi-air cockpit pro software)
5Mainboard fuse
6Connection J2 – power supply
7Connection J4 – defroster heater
8Connection J6 / J7 – power supply of the fans
9Connection J8 – power supply of the summer bypass
10 Switch – operating mode
11 Connection J16 / J17 – signal wiring of fans
12 Connection J23 – internal VOC sensor
13
Connection J5 – humidity sensor
14
USB connection
15
Connection J9 – temperature sensors
4 3 21
5
6
7
89 10 11 12 13 14
15

Installation and operating instructions profi-air 250/360 flex 11
3.1 Transport and unpacking
3.3.1 General
3 profi-air 250/360 flex installation
Please handle profi-air flex with utmost care during transport and unpacking.
3.2 Checking the scope of delivery
Please contact the supplier immediately if the delivered profi-air flex unit is damaged or incomplete.
The scope of delivery includes:
nprofi-air flex ventilation unit
nControl system incorporated into the front of the housing
nSheathed 19mm condensate drain hose incl. 1 clamp connector
nFastening rail for wall installation incl. noise separation and spacer
nPre-installed 230V connection cable, 1.7m length with Schuko plug (type E+F CEE 7/7)
nInstallation and operating instructions
nAdditional label for operating mode B
nEnergy label according to the ErP directive
Check the device type by means of the type plate.
3.3 Requirements for the installation room
nFrost-free throughout the year
nFrost-free connection to the wastewater system for units with heat recovery
nSucient space – e.g., silencers, manifolds, pre-heaters or post-heaters may be installed in addition to the ventilation unit
which usually require more space than the unit itself
nAccess to the unit must be ensured for maintenance / cleaning
nWall outlets are required for fresh and exhaust air which should neither be below ground level nor directly next to rooms
where a quiet environment is essential (living room, bedroom).
nCentral location of the room reduces routing
nStatically resilient installation surface
nIf the air induction is eected via an earth-air heat exchanger, the unit should be installed in the basement or on the ground
floor

AUTO
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B
H
H1
T
Installation and operating instructions profi-air 250/360 flex
12
≥ 700mm
3.3.2 Minimum clearances for maintenance purposes
3.4 Available and/or optional accessories / replacement filters
Accessories
Cat. no. Description
78316820 Connection set ISO pipe or spiral duct DN 160
78316850 Silencer DN 160
78300812 Floor mounting set
78300837 Wireless remote control
78300842 USB connection cable
78301830 Defroster heater 1.4kW (only for profi-air 250 flex)
78302830 Defroster heater 1.85kW (only for profi-air 360 flex)
78300803 Enthalpy heat exchanger
78300834 Internal VOC sensor
78300835 Internal humidity sensor
78300841 Room humidistat
78300838 Electrical connection box
78300886 Replacement filter set G4 / G4 (ISO Coarse 75%)
78300887 Replacement filter set G4 / F7 (ISO Coarse 75% / ePM1 55%)
78300910 External control unit

AUTO
AUTO
A B
Linksversion(A)
Leftunit
unitásinistra
Versiongauche
A
1
2
3
7
5
6
8
4
Installation and operating instructions profi-air 250/360 flex 13
Connection options
profi-air flex
Control board
Optional
defroster heater
Structure of the ventilation unit
Wireless remote control
Optional external control unit
Defroster heater
Connection box
Humidistat
LAN connection
RJ45 TCP/IP
Optional
humidity sensor
Optional
VOC sensor
Control unit
3.5 Electric connection options
3.6 Installation options and fastening of units
profi-air flex has been designed with flexible installation in mind. You have the option of installing profi-air flex as a wall unit or
on the floor using the profi-air floor mounting set. The easySWITCH function additionally allows switching the air connections
on site (right / left operation). You can also optionally connect the supply air from the top or from the bottom.
Schematic diagram of wall installation
Operating mode A (delivery condition)
3.6.1 Operating modes / adapting air directions

AUTO
AUTO
Linksversion(A)
Leftunit
unitásinistra
Versiongauche
AUTO
AUTO
Linksversion(A)
Leftunit
unitásinistra
Versiongauche
AUTO
AUTO
Linksversion(A)
Leftunit
unitásinistra
Versiongauche
A
AUTO
AUTO
AUTO
A B
Linksversion(A)
Leftunit
unitásinistra
Versiongauche
A
A
AUTO
AUTO
AUTO
A B
Linksversion(A)
Leftunit
unitásinistra
Versiongauche
A
1
5
6
7
2
3
8
4
Installation and operating instructions profi-air 250/360 flex
14
Schematic diagram of wall installation
Operating mode B
The following list of numbered components and airflow directions applies to both schematic diagrams.
Number Description
1Fastening rail for wall installation
2Supply air connection opening DN 160
3Extract air connection opening DN 160
4Optional connection option supply air DN 160
5Exhaust air connection opening DN 160
6Fresh air connection opening DN 160
7Label for specifying the selected operating mode
8Condensate drain cu
profi-air flex is delivered in operating mode A. If the installation situation requires operating mode B, this can be done as described
in the following.
Switching from operating mode A to B

AUTO
AUTO
A B
Linksversion(A)
Leftunit
unitásinistra
Versiongauche
A
A
AUTO
AUTO
Rechtsversion(B)
Rightunit
unitádestra
Versiondroite
B
AUTO
A
B
AUTO
AUTO
Linksversion(A)
Leftunit
unitásinistra
Versiongauche
Rechtsversion(B)
Rightunit
unitádestra
Versiondroite
B
AUTO
B
AUTO
AUTO
AUTO
Linksversion(A)
Leftunit
unitásinistra
Versiongauche
Rechtsversion(B)
Rightunit
unitádestra
Versiondroite
B
AUTO
P1 P3
P4 P2
A B
Rechtsversion(B)
Rightunit
unitátestra
Versiondroite
A
AUTO
B
AUTO
AUTO
A B
Rechtsversion(B)
Rightunit
unitádestra
Versiondroite
B
Installation and operating instructions profi-air 250/360 flex 15
If required, switch the operating mode before installing profi-air flex.
The condensate drain at the profi-air flex unit changes when the operating mode
is switched.
Operating modes can be switched in the “dead” state only.

516
8
12 220
42,5
62,5
220
440
AUTO
Installation and operating instructions profi-air 250/360 flex
16
3.6.2 Fastening of units
Wall mounting set for profi-air flex
The mounting set included with the delivery provides sound-decoupled installation
of the profi-air flex ventilation unit on a load-bearing wall. Attach the fastening rail to
the wall and mount the ventilation unit onto it. Two rubber buers, which are part of
the scope of delivery, as well as the edge protection mounted on the fastening rail
ensure noise separation to the building. Attach the self-adhesive rubber buers to
the rear surface of the housing. Eventually, mount the ventilation unit onto the rail
installed in the wall from above.
Installation of profi-air flex wall mounting set
Connect the condensate line only after wall installation of profi-air flex has
been completed.
Please ensure a clearance of at least 170mm between the finished floor and
the bottom of the unit to have enough space to connect the condensate line.
Cover all openings at the ventilation unit to avoid contamination of the air
pipes before installation.

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AUTO
AUTO
AUTO
AUTO
Installation and operating instructions profi-air 250/360 flex 17
Floor mounting set for profi-air flex
The mounting set is used for the sound-decoupled installation of the profi-air flex
ventilation unit. Both floor stands are screwed to the floor panel of the ventilation
unit. The unit can be aligned using the four adjustable rubber buers. They addition-
ally ensure sound-decoupled installations.
Installation of profi-air flex floor mounting set
Connect the condensate line only after floor installation of profi-air flex has
been completed.
Cover all openings at the ventilation unit to avoid contamination of the air
pipes before installation.

AUTO
AUTO
A B
Linksversion(A)
Leftunit
unitásinistra
Versiongauche
A
AUTO
AUTO
A B
Linksversion(A)
Leftunit
unitásinistra
Versiongauche
A
AUTO
Linksversion(A)
Leftunit
unitásinistra
Versiongauche
AUTO
Rechtsversion(B)
Rightunit
unitádestra
Versiondroite
B
AUTO
AUTO
AUTO
Linksversion(A)
Leftunit
unitásinistra
Versiongauche
A
AUTO
AUTO
AUTO
Linksversion(A)
Leftunit
unitásinistra
Versiongauche
AUTO
AUTO
A B
Linksversion(A)
Leftunit
unitásinistra
Versiongauche
A
A
AUTO
Installation and operating instructions profi-air 250/360 flex
18
3.7 Air connections
profi-air flex connection set (ISO pipe or spiral duct)
The profi-air flex connection set consists of four double nipples DN 160 incl. lip seal.
These double nipples provide the connection between the ventilation unit connect-
ing piece (fresh, exhaust, extract and supply air connection) and the pipe system
selected (profi-air ISO pipe or spiral duct). The lip seal guarantees airtight connec-
tions to the pipe system.
You can alternatively connect the supply air connector at the bottom of the unit.
In this case, however, you must observe which operating mode (A / B) has been
selected since this cannot be reversed. If you want to use the alternative cable
routing, you will have to cut open the EPS core along the cutting edge. The redun-
dant supply air opening must be sealed on site using a spiral duct cover with lip seal
DN 160.
Installation and connection
When using spiral ducts, condensation inside as well as outside the pipe
must be prevented by means of appropriate insulation.
Alternative supply air connection at the bottom (operating mode A)

AUTO
AUTO
A B
Linksversion(A)
Leftunit
unitásinistra
Versiongauche
A
AUTO
AUTO
A B
Linksversion(A)
Leftunit
unitásinistra
Versiongauche
A
90°
AUTO
AUTO
A B
Linksversion(A)
Leftunit
unitásinistra
Versiongauche
A
AUTO
AUTO
AB
Linksversion(A)
Leftunit
unitásinistra
Versiongauche
A
AUTO
A B
Linksversion(A)
Leftunit
unitásinistra
Versiongauche
A
AUTO
AUTO
AUTO
Linksversion(A)
Leftunit
unitásinistra
Versiongauche
AUTO
AUTO
Linksversion(A)
Leftunit
unitásinistra
Versiongauche
AUTO
AUTO
A B
Linksversion(A)
Leftunit
unitásinistra
Versiongauche
A
Installation and operating instructions profi-air 250/360 flex 19
With operating mode A,
you must NOT cut open the right
side since this would lead to a
discharge of the condensate!

AUTO
Linksversion(A)
Leftunit
unitásinistra
Versiongauche
AUTO
Rechtsversion(B)
Rightunit
unitádestra
Versiondroite
B
AUTO
AUTO
AUTO
Linksversion(A)
Leftunit
unitásinistra
Versiongauche
Rechtsversion(B)
Rightunit
unitádestra
Versiondroite
B
AUTO
A
AUTO
B
AUTO
AUTO
AUTO
Linksversion(A)
Leftunit
unitásinistra
Versiongauche
Rechtsversion(B)
Rightunit
unitádestra
Versiondroite
B
AUTO
AUTO
AUTO
A B
Linksversion(A)
Leftunit
unitásinistra
Versiongauche
A
Rechtsversion(B)
Rightunit
unitádestra
Versiondroite
B
AUTO
B
AUTO
AUTO
AUTO
A B
Linksversion(A)
Leftunit
unitásinistra
Versiongauche
A
Rechtsversion(B)
Rightunit
unitádestra
Versiondroite
B
AUTO
90°
AUTO
AUTO
A B
Linksversion(A)
Leftunit
unitásinistra
Versiongauche
A
Rechtsversion(B)
Rightunit
unitádestra
Versiondroite
B
AUTO
AUTO
AUTO
AB
Linksversion(A)
Leftunit
unitásinistra
Versiongauche
A
Installation and operating instructions profi-air 250/360 flex
20
Alternative supply air connection at the bottom (operating mode B)