S&P NEMBUS 210 User manual

NEMBUS 210
EN

3
INDEX
1. GENERAL SAFETY INSTRUCTIONS ................................................................................................................................5
2. GENERAL INSTRUCTIONS ..............................................................................................................................................5
2.1. Intended use ............................................................................................................................................................. 5
2.2. Improper use ............................................................................................................................................................ 5
2.3. Warranty ...................................................................................................................................................................5
3. COMPONENTS / ITEMS DELIVERED...............................................................................................................................6
3.1. Components NEMBUS 210 ......................................................................................................................................6
3.2. Accessories............................................................................................................................................................... 7
3.3. Replacement parts...................................................................................................................................................7
4. TECHNICAL DATA............................................................................................................................................................ 7
4.1. Conditions for installation ........................................................................................................................................ 7
4.2. Device data ...............................................................................................................................................................7
4.3. Efficiency ..................................................................................................................................................................7
4.4. Speeds ......................................................................................................................................................................7
4.5. Serial number...........................................................................................................................................................7
4.6. Dimensions............................................................................................................................................................... 8
4.7. diagram main circuit board......................................................................................................................................9
5. INSTALLATION (specialists).......................................................................................................................................... 10
5.1. Instructions on installation ....................................................................................................................................10
5.2. Installing ventilation system NEMBUS 210 ........................................................................................................... 10
5.2.1. Installation position ceiling installation....................................................................................................... 10
5.2.2. Installation position wall installation........................................................................................................... 10
5.2.3. Ceiling installation........................................................................................................................................ 11
5.2.4. Wall installation............................................................................................................................................ 11
5.2.5. Installation of outdoor air and extract air ducts .......................................................................................... 12
5.2.6. Connect condensate duct............................................................................................................................. 12
5.2.7. Inspection opening (created during construction)....................................................................................... 13
5.3. Connection control panel NEMBUS-FB................................................................................................................. 13
6. COMMISSIONING (specialists)...................................................................................................................................... 15
6.1. Instructions for commissioning ............................................................................................................................. 15
6.2. Adjusting flow rates................................................................................................................................................ 15
6.2.1. Set nominal airflow rate (extract air) according to curves .......................................................................... 15
6.2.2. Adjusting flow rate with differential pressure gauge................................................................................... 18
6.3. Enabling/Disabling humidity sensor for automatic mode..................................................................................... 19
6.4. Enabling/Disabling VOC sensor (optional accessory) for automatic mode........................................................... 20
6.5. Enabling/disabling 0-10V input (external sensor) for automatic mode ................................................................ 22
6.6. Activating fireplace mode....................................................................................................................................... 22
6.7. Emergency shutdown contact................................................................................................................................ 23
6.8. Activating fan speed Boost ventilation................................................................................................................... 24
6.9. Activating weekly programme................................................................................................................................ 24
7. INDIVIDUAL USER SETTINGS ....................................................................................................................................... 25
7.1. Setting timer for filter alarm.................................................................................................................................. 25
7.2. Setting weekly programme .................................................................................................................................... 26
8. OPERATION (users) ....................................................................................................................................................... 29
8.1. Control panel NEMBUS FB .................................................................................................................................... 29
8.2. Setting fan speed by hand ...................................................................................................................................... 30
8.3. Turn ON/OFF Boost ventilation .............................................................................................................................. 30
8.4. Turn on/off summer bypass ................................................................................................................................... 30
8.5. Turning sleep mode on/off ..................................................................................................................................... 30
8.6. Turning summer mode on/off ................................................................................................................................ 30
8.7. Turning automatic mode ON/OFF .......................................................................................................................... 30
8.8. Anti-freeze feature ................................................................................................................................................. 30
8.9. Reset filter alarm ................................................................................................................................................... 31
9. REDUCED LIST OF MODBUS REGISTERS ....................................................................................................................31

4
10. REPAIRING FAULTS ......................................................................................................................................................33
10.1. Malfunctions ......................................................................................................................................................... 33
10.2. Error messages.................................................................................................................................................... 34
11. MAINTENANCE (users)................................................................................................................................................. 35
11.1. Changing filters .................................................................................................................................................... 35
12. MAINTENANCE (specialists)......................................................................................................................................... 36
12.1. Maintenance periods............................................................................................................................................ 36
12.2. Logs preventive maintenance............................................................................................................................... 36
12.3. Cleaning................................................................................................................................................................ 37
12.3.1. Cleaning ventilation system...................................................................................................................... 37
12.3.2. Cleaning heat exchanger .......................................................................................................................... 38
12.3.3. Cleaning fan blade .................................................................................................................................... 39
13. REPAIRS (specialists) ...................................................................................................................................................40
13.1. Change fans.......................................................................................................................................................... 40
13.2. Replacing heat exchanger.................................................................................................................................... 42
13.3. Replacing main circuit boards.............................................................................................................................. 43
13.4. Replace humidity/temperature sensor................................................................................................................ 44
14. DECOMMISSIONING/DISPOSAL ................................................................................................................................... 45
14.1. Decommissioning with disassembly.................................................................................................................... 45
14.2. Packaging ............................................................................................................................................................. 45
14.3. Used devices......................................................................................................................................................... 45
15. ErP DATA ....................................................................................................................................................................... 46
16. PUTTING OUT OF SERVICE AND RECYCLING .............................................................................................................. 47

5
1. GENERAL SAFETY INSTRUCTIONS
CAUTION
This appliance can be used by children
aged from 8 years and above and persons
with reduced physical, sensory or men-
tal capabilities or lack of experience and
knowledge if they have been given super-
vision or instruction concerning use of
the appliance in a safe way and unders-
tand the hazards involved. Children shall
not play with the appliance. Cleaning and
user maintenance shall not be made by
children without supervision.
The following safety instructions must be followed to
prevent injuries or damages:
• Before you begin with the installation, operation,
maintenance and repair of the ventilation system,
read these operating and installation instructions
carefully.
• Installation, repairs and electrical work may only
be carried out by qualified specialists.
• When installing, commissioning and repairing the
ventilation system, you must take into account and
obey all necessary legal and national requirements
(accident prevention provisions and the generally
acknowledged rules of technology).
• While the ventilation system is operating, all co-
vers must be closed.
• If you use a fireplace, whether or not it is depen-
dent on indoor air, you must consult the chimney
sweep responsible for the district.
• Keep these operating and installation instructions
in a safe place or leave them on the ventilation sys-
tem, because important information for operation
is included in the instructions.
• Liability for damages that arise due to improper
storage, installation, operation or repair, insuffi-
cient maintenance or unintended use is excluded.
• We reserve the right to make technical modifica-
tions.
2. GENERAL INSTRUCTIONS
2.1. INTENDED USE
The ventilation system NEMBUS 210 is intended for con-
trolled ventilation and venting of single-family houses.
The unit assures a continuous and balanced ventilation
system, extracting moist stale air from the wet rooms
and at the same time introducing a tempered and filtered
fresh air to the habitable rooms.
The unit contains as a standard filters in the supply and
extract airflows to clean the incoming air and protect the
heat exchanger.
2.2. IMPROPER USE
Any other use of the ventilation system NEMBUS 210 not
described under “intended use” is prohibited.
Furthermore, the ventilation system NEMBUS 210 may
not be installed in a room below +12°C.
The ventilation system NEMBUS 210 may not be opera-
ted without outdoor air filter and extract air filter.
It should only be turned off for maintenance and repair
work.
Central ventilation systems are, designed for continuous
operation. Unscheduled shutdown of the ventilation sys-
tem can lead to formation of condensate inside the piping
network and to damages to the ventilation system. For
this reason, when shutting down the system for longer
periods, the outdoor air and extract air lines must be
sealed off.
The ventilation system NEMBUS 210 is not suitable for
drying construction.
2.3. WARRANTY
The unit supplied by S&P is warranted 24 months, parts
only, starting from the invoicing date.
S&P agrees to replace the parts or the unit whose opera-
tion is recognized defective by our departments except for
all damages and interests or penalties such as operating
losses, commercial prejudice, or other immaterial or indi-
rect damages.
The following are not covered by our warranty: defects re-
sulting from an abnormal usage or a usage not conforming
to the recommendations of our manuals; faults observed
as a consequence to normal wear; incidents caused by ne-
gligence, lack of monitoring, or servicing; faults due to the
incorrect installation of the devices or to bad storage condi-
tions before mounting.
In any case, S&P will not be responsible for transformed
unit, repaired even partially.

6
3. COMPONENTS / ITEMS DELIVERED
3.1. COMPONENTS NEMBUS 210
M2
M1
FUSE 5x20FUSE 5x20
11
7 6 5 3
10
9
8 2
1
14
15/16716 15
12 13
M+P 26A 2056
1Ventilation system NEMBUS 210
2Connection for extract air (ETA)
3Filter (extract air) – ISO Coarse 65% (G4)
5Main circuit boards
6Extract air fan
7Cable for power supply
8Connection for extract air (EHA)
9Connection for condensate DN20
10 Connection for outdoor air (ODA)
11 Filter (outdoor air) – ISO Coarse 65% (G4)
Optional: ISO ePM1 70% (F7)
12 Heat exchanger
13 Supply air fan
14 Connection for supply air (SUP)
15 Flexible duct DN19/23, 150 mm
15/1 connection nipple for flexible connecting tube
to DN32
16 Control panel, including 5 m cable

7
3.2. ACCESSORIES
Item no. Description
5800018800 NEMBUS-VOC
VOC-Sensor
5800017800 SABIK-NEMBUS-SF
Servoflow (constant airflow kit)
5800018200 NEMBUS210-PH (Pre heater)
5800016200 SPCM
Communications module
5800015700 DSI (dry siphon)
3.3. REPLACEMENT PARTS
Item no. Description
R153120101 NEMBUS 210-M1 scroll/ventilator unit
R153120007 NEMBUS 210-M2 scroll/ventilator unit
R153120016 NEMBUS 210-PL main PCB
R153120023 NEMBUS 210-FA Filter cover
R153120037 NEMBUS 210-TFF humidity/
temperature sensor
R153120009 NEMBUS 210-HRPTC Preheater
module w/o PCB
R153139302 NEMBUS 210-WT Heat exchanger
R153139052 SABIK-NEMBUS-HRE Preheater PCB
R153139024 SABIK-NEMBUS-FB Remote control
4. TECHNICAL DATA
4.1. CONDITIONS FOR INSTALLATION
Ambient temperature
installation site
+12°C to +40°C
Minimum outdoor air
temperature (Including
preheating radiator [optional
accessory])
-15°C
Environmental conditions Non-saline, no
aggressive chemicals,
no risk of explosion
4.2. DEVICE DATA
Weight 32 kg
Material Powder coated sheet metal
Connection for
condensate
DN20
Supply voltage 230 V AV, 50/60 Hz
Safety plug
Max. power input Pmax. = 82 W, Imax. 0.8 A
Nominal airflow rate
(extract air)
160 m³/h at 100 Pa
Speed regulation Four speeds
Direct-current fans 2 pieces, backwardcurved
impeller DN 190 EC
Counterflow heat
exchanger
Plastic
Filter Filter quality extract air side:
• ISO Coarse 65% (G4)
Filter quality supply air side:
• ISO Coarse 65% (G4)
• Optional: ISOePM1 70% (F7)
Control panel With cables
Weekly timer Four pre-set programmes
Protection class IP21
4.3. EFFICIENCY
EN 13141-7 PHI
83.4% 82.2%
4.4. SPEEDS
Factory setting
Fan speed V1 Humidity protection (40%)
Fan speed V2 Reduced ventilation (70%)
Fan speed V3 Nominal air (100%)
Intensive ventilation Intensive ventilation (130%)
4.5. SERIAL NUMBER
9
M+P-26A-2273
74
The serial number is located on the nameplate next to
the condensate connection (9).

8
4.6. DIMENSIONS
694
622
396
147
122 144
147
1223
1252
134 122
125
20
19.5
9
391
141 158
264
A
A
235
271

9
4.7. DIAGRAM MAIN CIRCUIT BOARD
FUSE 5x20
2
1
46 48 49 50 5147 52
3024394142 2735 28
323334
36
37 3138434445
53 54
40
77
7
7
7
30 Connection VOC sensor (optional accessory)
24 Connection control panel
31 Dipswitches for adjusting activating/adjusting
the unit parameters
32 Modbus RTU connection / Connection for
communication module SPCM (optional
accessory)
27 Potentiometer for adjusing the extract air
volume of the unit (factory setting Position 4)
33 External boost contact
28 Potentiometer for adjustment of the ratio
of flow rates between supply and extract air
(factory setting Position 0)
34 Connection 0-10 V signal (optional accessory)
35 Potentiometer for target setting of humidity
sensor or VOC sensor (optional accessory)
(factory setting Position A)
36 Connection pressure sensor for constant
pressure mode
37 Contact EMERGENCY SHUTDOWN
38 Button cell type CR1220 for storing time
39 Connection preheating battery (optional
accessory)
40 Connection ServoFlow Kit (optional accessory)
41 Reset (factory setting)
42 Potential-free contact
43 Microfuse F5L250V
44 Harmonics filters
45 Voltage supply preheating battery
46 Connection differential pressure gauge for
adjustment of extract airflow rate
47 USB connection for software updates
48 Voltage supply M1
49 Voltage supply M2
50 Connection summer bypass
51 Connection differential pressure gauge for
adjustment of conditions flow rates (supply air)
52 Connection temperature/humidity sensors
53 Control signals M2
54 Control signals M1

10
5. INSTALLATION SPECIALISTS
CAUTION
The ventilation system may only be installed by qua-
lified specialists, otherwise there is risk of injury or
damages.
CAUTION
In order to protect the system from dirt and humidity,
all openings must be sealed, e.g. using a construc-
tion protector, until commissioning.
NOTE
The following representations of the ventilation sys-
tem are schematic drawings. For all maintenance
tasks, the device is installed immovably on the cei-
ling or wall.
5.1. INSTRUCTIONS ON INSTALLATION
• The ventilation system can be installed on the ceiling
or on the wall.
• As far as construction, the shell must be finished and
the entire wall structure of the interior and exterior
walls must be completed.
• During construction, the core drill holes in the exterior wall
for the outdoor air and outgoing air lines must be made.
• The ventilation system can be installed in dry rooms
above +12°C, for example in the utility room.
NOTE
If the temperature in the installation area drops be-
low +12°C, then in individual cases condensate may
form on the device casing.
• The ventilation system is placed so that the outdoor air
and outgoing air lines can be conducted out of the buil-
ding by the shortest path.
• The ventilation system must be installed with noise
coupling.
• The ventilation system must be easily accessible for all
maintenance and repair work. During construction, a
sufficiently large inspection door must be provided for
this, see page 13.
• Start operation of the ventilation system only after
completion of all installation tasks.
5.2. INSTALLING VENTILATION SYSTEM
NEMBUS 210
5.2.1. Installation position ceiling installation
110 2 14
M+P-26A-2057
>1%
8
9
1Ventilation system NEMBUS 210
2Extract ductwork
8Dry siphon (optional accessory)
9Condensate duct
10 Outdoor air duct work
14 Supply air duct work
5.2.2. Installation position wall installation
2
10
1
9
14
M+P-26A-2274
1Ventilation system NEMBUS 210
2Extract ductwork
9Condensate duct
10 Outdoor air duct work
14 Supply air duct work
NOTE
The outdoor air and extract air connection must be
always be conected on the bottom in the wall moun-
ted units of the NEMBUS 210 (1).

11
5.2.3. Ceiling installation
1
18
17
B
C
A
D
1. Drill holes.
Amin. 400 mm
Bmin. 200 mm
C625 mm
D1253 mm
2. Position ventilation system (1) with the outside air and
extract air side toward the exterior wall (17) and fasten
with screws (18).
NOTE
Screws (18) are not included in items delivered. Se-
lect screws (18) with appropriate dowels for the bric-
kwork.
5.2.4. Wall installation
D
A
1
18
18
M+P-26A-2275
&
1. Drill holes.
A390 mm (including space needed for condensate
connection)
C625 mm
D1253 mm
2. Fasten ventilation system (1) with screws (18).
NOTE
Screws (18) are not included in items delivered. Se-
lect screws (18) with appropriate dowels for the bric-
kwork.

12
5.2.5. Installation of outdoor air and extract air
ducts
NOTE
It is indispensable install insulated duct on the out-
door air and extract air in order to avoid condensa-
tion.
5.2.6. Connect condensate duct
NOTE
The following description is a suggestion for installa-
tion of the condensate duct.
Ceiling installation
66
66
15/1 15
1
1
> 1%
67
68
CAUTION
When installing the condensate line, a gradient > 1%
must necessarily be observed.
1. Fasten flexible connection tube (15) with connection
end DN23 onto the ventilation system (1) with a stan-
dard hose clamp, e.g. 12-20 mm.
2. Attach standard waste pipe DN32 (66) to the connec-
tion nipple (15/1).
3. Insert the flexible connection hose (15) into the shor-
tened connection nipple (15/1), and fasten with a stan-
dard hose clamp, e.g. 23-35 mm.
4. Connect standard waste pipe DN32 (66) with dry si-
phon (67, reference 5800015700 DSI) and insert it into
the waste water line (68).
Wall installation
1
1
15/1
15
67
66
67
15
66
68
1. Fasten flexible connection hose (15) with the connec-
ting end DN23 onto the ventilation system (1) with the
standard hose clamp, e.g., 12-20 mm.
2. Insert dry siphon (optional) (67) with connection nipple
(15/1) into the flexible connection hose (15), and fasten
with the standard hose clamp, e.g., 23-35 mm.
3. Connect standard waste pipe DN32 (66) with the dry
siphon (optional) (67) and insert into the waste water
line (68).

13
5.2.7. Inspection opening (created during
construction)
19
1
During construction an inspection opening must be for-
seen for maintenance and repair work (19).
The inspection opening (19) must be made centrally for
the ventilation system (1). The minimum size of the ins-
pection opening should be 750 x 1400 mm.
NOTE
When installing the ventilation system on the wall,
the procedure for the inspection opening is analo-
gous.
5.3. CONNECTION CONTROL PANEL NEMBUSFB
NOTE
The control panel can be installed on the wall (sur-
face-mounted). Maximum cable length is 30 m (re-
commended cable type: twisted pair shielded cable
4x0,22 mm2) to connect with the remote control.
20
21
20
12
M+P-26A-2061
1. Remove screws Torx 10 (20) (Arrow 1).
2. Remove cover (21) (Arrow 2).

14
blue
white
green
red
0
12V
A
B
22 26
24
16
73
22 22 22
M+P 26A 2277
3. Connect cable (22) from the control panel (16) to the
connection (24).
25
60
4. Drill holes for cover of control panel (25) at the inten-
ded installation location.
5. Conduct cable (22) from the wall opening into the
flush-mounted box (73).
NOTE
Flush-mounted box (73) is not included in the items
delivered and must be provided on construction.
6. Insert flush-mounted box (73) in wall opening.
7. Connect cable (22) to plug (26).
8. Insert control panel (16) into flush-mounted box (73)
and screw.
NOTE
No screws are included in the delivered parts. Select
screws with dowels appropriate for the brickwork.
9. Connect ventilation system to power supply.
a pag.26

15
6. COMMISSIONING SPECIALISTS
CAUTION
Only qualified specialists may commission the ven-
tilation system, otherwise there is risk of injury or
damage.
6.1. INSTRUCTIONS FOR COMMISSIONING
• Before commissioning, the system including all air li-
nes must be checked for possible pollution residues or
foreign bodies and cleaned.
• All electrical safety features are properly connected
and configured and ready for operation.
6.2. ADJUSTING FLOW RATES
The flow rates can be set according to curves or accor-
ding to differential pressure measured at the differential
pressure taps.
The condensate duct must be installed before adjusting
the flow rates. Check that the siphon has been filled with
water or that there is a dry siphon installed (optional ac-
cessory - 5800015700). There must be a water seal at the
condensate connection.
Check this and secure it.
6.2.1. Set nominal airflow rate (extract air)
according to curves
20
21
20
12
M+P-26A-2061
1. Remove screws Torx 10 (20) (Arrow 1).
2. Remove cover (21) (Arrow 2).
3. Set up power supply of the ventilation system.
4. Turn on fan speed V3 on the control panel, see page
30.
NOTE
The below curves and adjustments refers always on
adjustments on speed V3!
27
A 40
M+P-26A-2225
5. The nominal airflow volume (extract air) can be set
in accordance with the specifications using the cur-
ves with the potentiometer (27), see diagram on page
16.
In the factory setting, the potentiometer (27) is at Po-
sition 4. It must be set to the value of the curve that is
closest to the intersection point between the nominal
airflow rate needs and static pressure lost. Then, the
extract and supply airflows must be checked and if
needed a readjustment must be made with the poten-
tiometer (27) (extract air) and the potentiometer (28)
(supply air).
As an alternative, the flow rates can be set by measu-
ring the differential pressure or by the constant air-
flow module ServoFlow (optional accessory).

16
[Pa]
[m3/h]
0
0 20 40 60 80 100 120 140 160 180 200 220 240 260
20
40
60
80
100
120
140
160
180
200
220
2
1
0
3
4
5
6
7
8
9
A
B
C
D
E
I
[Pa] Pressure loss
[m³/h] Nominal flow rate (extract air)
I System operating pressure

17
Adjustment flow rate
The airflow balance between supply and extract air can
be adjusted. The supply airflow rate is adapted on a per-
centage basis to the extract airflow rate at the potentio-
meter (28), see table below.
S&P recommends a slight underpressure in the house
e.g. less supply airflow then extract airflow.
28
A 40
M+P-26A-2226
Set potentiometer (28) to the required value (factory se-
tting Position 0).
Position
potentiometer
(28)
89ABCDEF01234567
Ratio supply
air/extract air
-32% -28% -24% -20% -16% -12% -8% -4% 0 +4% +8% +12% +16% +20% +24% +28%
Reduce supply airflow Increase supply airflow

18
6.2.2. Adjusting flow rate with differential
pressure gauge
S&P recommends a slight underpressure in the house
e.g. less supply airflow then extract airflow.
20
21
20
12
M+P-26A-2061
1. Lose screws Torx 10 (20) (Arrow 1).
2. Remove cover (21) (Arrow 2).
NOTE
The first step is always to set the airflow rate for ex-
tract air.
3. Set up power supply for the ventilation system.
4. Turn on fan speed V3 on the control panel, see page
30.
Pa
XXXX
1
29
46
27
A 40
M+P-26A-2065
5. Connect differential pressure gauge (29) to the di-
fferential pressure connecting piece 1 (46) and
take a reading of the differential pressure [Pa].
Pay attention to the correct connection of + and -
(+/+ and -/-).
6. Turn potentiometer (27) until the desired differential
pressure (= airflow rate) is displayed on the differen-
tial pressure gauge (29).
Take value from the following table.
Example:
1. The desired airflow rate (extract air) is 110 m³/h.
2. Look for the value 110 in the table.
3. Turn potentiometer (27) until 7.5 Pa is displayed on
the differential pressure gauge (29).
Nominal airflow
rate (extract air)
[m³/h]
Differential pressure connecting
piece 1/ potentiometer (27)
[Pa]
90 15-16
100 18-20
110 22-23
120 25-28
130 31-34
140 37-39
150 41-43
160 45-47

19
Adjust supply flow rate
Pa
XXXX
2
29
51
28
A 40
M+P-26A-2066
1. Connect differential pressure gauge (29) at the diffe-
rential pressure socket 2 (51), and take differential
pressure reading [Pa]. Be careful with the correct con-
nection of + and - (+/+ and -/-).
2. Turn the potentiometer (28) until the desired differen-
tial pressure is displayed on the differential pressure
gauge (29). You can take the value from the table be-
low.
Example:
1. The desired supply airflow rate is 105 m³/h.
2. Look for the value 105 in the table.
3. Turn the potentiometer (28) until the differential
pressure gauge (29) displays 6.6 Pa.
Supply
airflow rate
[m³/h]
With preheater.
Differential pressure connecting
piece 2 / potentiometer (28)
[Pa]
90 10-11
100 12-13
110 14-15
120 16-17
130 19-20
140 23-25
150 27-29
160 31-33
6.3. ENABLING/DISABLING HUMIDITY SENSOR
FOR AUTOMATIC MODE
In the automatic mode, the ventilation system regulates
the speed using the value set for relative humidity in the
extract air. To this end, the humidity sensor must be acti-
vated (factory setting: humidity sensor activated).
20
21
20
12
M+P-26A-2061
1. Disconnect power supply from ventilation system.
2. Remove screws Torx 10 (20) (Arrow 1).
3. Remove covering (21) (Arrow 2).
123456
on
off
78
4. Enable (factory setting): Set DIP switch 1 to "on"
Disable: Set DIP switch 1 to "off"

20
35
A 40
5. Adjust potentiometer (35) according to the extract air
humidity set point, see table below (factory setting Po-
sition A).
The upper target value for extract air humidity can be
adjusted using the potentiometer (35) between 60-
90% (factory setting 80%, Position A).
The lower target value is permanently set to 45%. If
the humidity is in the range set, the device adjusts
the speed proportionally according to the humidity. If
the humidity is lower than 45% the unit will run in the
lowest speed (humidity protection, V1). When the hu-
midity exceeds the upper target value the unit will run
on speed V3 (nominal airflow).
Extract air humidity
(%)
Position potentiometer
(35)
60 0
62 1
64 2
66 3
68 4
70 5
72 6
74 7
76 8
78 9
80 A
(Factory setting)
82 B
84 C
86 D
88 E
90 F
6. Screw on cover (21) firmly with screws Torx 10 (20).
7. Set up power supply for ventilation system.
8. In order to set the ventilation system to the
humidity -controlled mode, keep symbol
pressed for 5 seconds.
When the automatic mode (humidity con-
trol) is activated, the A symbol lights up on
the bottom of the control panel.
6.4. ENABLING/DISABLING VOC SENSOR
OPTIONAL ACCESSORY FOR AUTOMATIC
MODE
In automatic mode, the ventilation system regulates the
speed in dependence of the concentration of pollutants
measured in the extract air. For this purpose, a VOC sen-
sor NEMBUS-VOC (optional accessory) must be insta-
lled, see separate operating and installation instructions.
The VOC upper target value is set using the potentiome-
ter (35) and can be set from 1100 to 2000 ppm.
The lower target value of 450 ppm is permanently pro-
grammed. The upper target value has been pre-set to
1700 ppm at the factory.
If the upper target value is exceeded, then the ventila-
tion system runs with nominal air (V3). If the system falls
down of the lower target value, then the system runs in
the humidity protection speed (lowest speed, V1).