• 1.09.351E
• 05.09.06
• Code 3522
©
TECHNICAL SPECIFICATION
NOTE:
1 dm3/sec = 1 L/sec
L/sec x 3.6 = M3/hr
• For dwelling-specific ventilation
• Supply and extract air ventilation with
heat recovery
• Heat recovery efficiency of the countercurrent cell up to 80%
• Good filtering
• Fixed air flow measuring outlets
• Fan speed adjustment at the cooker hood
• HR bypass as a standard feature
• There is a fire valve between the
ventilation unit and the cooker hood
• The ventilation unit cannot be switched off
at the cooker hood
© • We reserve the right to make changes without prior notification.
Product code 3522
Models
SC
90K SC R
90K SC L
Electrical connection
230 V, 50 Hz, ≈ 0.9 A
(+ preheating unit 3.9 A)
Class of protection
IP 30
Extract air
Fans
direct current (DC) Supply air
85 dm3/s 50 Pa
Heat recovery
Heat recovery bypass
Electric preheating unit (option )
Filter
Extract air
Supply air
0.10 kW 0.44 A
0.10 kW 0.44 A
72 dm3/s 50 Pa
Counter-current cell, >80%
Summer/winter damper
max. 900 W 3.9 A
G3
G3 / F7 (F7 optional)
Weight
42 kg
Power adjustment of ventilation
– cooker hood
Options
– pressure switch
– F7 filter
90K SC
DIMENSIONS AND MAIN PARTS
4
Dimensions and duct outlets
7
595.4
2
11
8
3
797.4
5
1
18
15
6
14
9
16
10
17
MODEL R
157.2
117.2
4
1
13
Measurement outlets
114
345.3
45
2
12
82.5
157.5
151.5
82.9
582
3
Measurement outlets are located behind the machine plate.
Detach the machine plate by lifting it upwards.
MODEL L
117.2
157.2
Fastening brackets
Condensing water outlet above
the grease filter of the cooker.
Fastening brackets are located
up in the back of the unit.
157.5
151.5
82.5
82.2
Condensing water outlet
4
1
45
345.3
114
2
3
Main parts
Duct outlets, inner
diameter of collar
ø 125 mm
1
Extract air fan
7
Outdoor air filter G3
13
Connection box
2
Supply air fan
8
Extract air filter G3
14
3
Preheating radiator
(option)
9
Summer / winter damper
Speed selector switch
(forced)
10
Summer / winter
damper release
15
Cooker hood damper
controller
1
1 Supply air to the dwelling
4
Measurement outlets
2
2 Extract air from the dwelling
5
Heat recovery cell
11
Safety switch
16
Light switch
3
2 Outdoor air to the unit
6
12
Cooker hood
17
Filter guard indicator
4
4 Exhaust air outside
Outdoor air filter F7
(option)
18
Fire valve
© • We reserve the right to make changes without prior notification.
2
2
90K SC
PERFORMANCE
Air volumes
Measuring points after the
connection outlet.
SUPPLY / EXTRACT AIR VOLUMES /90K SC
Note!
Without an F7 filter, supply air volumes
are by circa 10% greater than indicated
in the curves.
Pressure loss in ducts. Total pressure
Pa
300
S = Supply air curve (G3 and F7 filters)
Supply air
Extract air
E5
250
SFP, kW (m3/s) 2.5
E4
200
E3
S
SK
E2
100
Recommended
operating range
EK
150
50
Fan curves indicate the total
pressure available for duct losses.
E = Extract air curve (G3 filter)
E
E1
0
20
10
S1
50
S2
30
100
SFP (Specific Fan Power)
guideline value <2.5 (kw/m3/s)
S4
S3
60
40
50
150
200
250
VOLUME FLOW
70
S5
80
90
300
350
P1, T1 =
P2, T2 =
P3, T3 =
P4, T4 =
P5, T5 =
Input power (total) (W)
SFP =
Air flow (dm3/s)
SK and EK are examples of pressure
losses in supply and extract ducts
100
110
dm3/s
400
2VDC
4VDC
6VDC
8VDC
12VDC
m3/h
(control voltage)
(control voltage)
(control voltage)
(control voltage)
(control voltage)
Sound values
Sound power level from the ventilation unit
to supply air ducts by octave band Lw, dB
Hz
1
14 l/s
ADJUSTMENT POSITION / AIR FLOW
2
3
5
34 l/s
49 l/s
67 l/s
Sound power level from the ventilation unit
to extract air ducts by octave band Lw, dB
1
23 l/s
63
58.4
75.0
76.4
82.9
58.3
66.3
69.8
71.6
125
49.7
67.4
69.1
73.3
48.7
65.0
66.8
70.8
frequency
250
40.5
53.8
58.4
64.9
42.1
52.4
57.4
62.6
of the octave
500
35.8
44.6
48.4
54.0
32.9
39.4
44.4
49.1
1000
27.2
41.2
46.0
49.2
24.4
39.3
43.4
46.1
2000
12.9
32.4
39.7
44.8
16.8
32.7
40.2
43.9
21.0
28.9
34.5
22.8
30.4
35.3
18.8
24.7
4000
19.4
8000
LW, dB
LWA, dB(A)
*1
*2
*3
4
*5
Total input
power W
20
51
78
140
200
*) factory preselected control speeds
ADJUSTMENT POSITION / AIR FLOW
2
3
5
47 l/s
64 l/s
79 l/s
Medium
band, Hz
Fan speeds
59.1
75.8
77.2
83.4
58.9
68.8
71.7
74.6
38.1
54.9
56.2
61.4
37.4
51.9
53.8
58.2
A-weighted sound pressure level dB (A) coming
from the unit through the envelope to the rooms where
the unit has been installed (10 m2 sound absorption)
ADJUSTMENT POSITION / AIR FLOWS
(supply / extract)
1
2
3
5
14/23 l/s 35/48 l/s 50/66 l/s 67/76 l/s
LpA, dB(A)
33.1
50.4
47.6
90K SC
49.8
3
© • We reserve the right to make changes without prior notification.
90K SC
OPERATION
Heat recovery bypass
C
D
E
In winter use the heat recovery cell of 90K SC recovers heat from the air leaving the
dwelling and uses it to heat the air coming from the outside.
In summer use when it is warm outside, it is unnecessary to heat outdoor air. The heat recovery
cell is bypassed in 90K SC with the standard damper (A). The position of the damper
can be changed by opening the damper release (B) and then moving the summer/winter damper
in another position. In the summer position air flow through the cell is prevented, and heat
recovery bypass is activated.
G
Air filtering
A
B
Summer/winter damper in
winter position
90K SC features coarse filtering of both extract and supply air before the fans. The
supply air side includes a G3 class coarse filter (C) and the extract air side a G3 class coarse
filter (D). The unit can also be equipped with an F7 fine filter (E), which captures fine dust and
pollen as well dust not seen to the eye. The filters need to be in place in the unit whenever
ventilation is in operation.
Defrosting
Water condensing from extract air may freeze in the heat recovery cell. Freezing can be
prevented by stopping the supply air fan, or the unit can be equipped with a preheating resistor,
which is switched on as needed.
Stopping the supply air fan
Defrost thermostat T1 stops the supply air fan whenever the temperature of extract air goes
below +5 °C after the cell. The fan restarts when temperature has risen by circa three degrees,
i.e. to +8 °C. The limit of the thermostat (F) can be adjusted at the back of the heat recovery
cell. If the unit includes a preheating radiator (G), the supply air fan cannot be stopped.
Outdoor air preheating
Summer/winter damper in summer
position
You can switch the summer/winter
damper to winter position by pushing
the damper behind the holder.
Preheating
radiator (G)
Preheating radiator is
located behind a shield.
The unit may have been equipped with a preheating radiator at the factory. If this is the case,
defrost thermostat T1 switches the preheating radiator on whenever the temperature of extract
air goes below +5 °C after the cell. The preheating radiator switches off when temperature has
risen by circa three degrees, i.e. to +8 °C. The preheating radiator heats outdoor air before
the cell and prevents it from freezing. In very cold temperatures the preheating radiator is not
enough to heat maximum air flow to a sufficient degree (at a temperature of -30 °C, maximum
air flow is 30 dm3/s, which corresponds to speed 2). The limit of the thermostat can be adjusted
at the back of the heat recovery cell.
Selection of fan speed
Fan speed is selected by using the speed selector switch on the cooker hood.
Cooker hood speed selector switch
The speed selector can be used to select speeds 1, 2, 3 and 4:
G
1.
Use during absence. When the dwelling is empty, ventilation can temporarily be diminished.
2-3. Normal use. In normal conditions air needs to be replaced once in two hours.
4.
Boosted operation. Cooking, bathing in the sauna or bathroom, drying clothes, using the
toilet, having guests, overheat or a similar situation may cause a need for higher than
normal ventilation.
Cooker hood damper controller
When cooking, open the cooker hood damper.
Defrost thermostat (F)
First remove the heat recovery
cell, then the cap protecting the
adjusting screw of the thermostat.
© • We reserve the right to make changes without prior notification.
F
Post-heating
F
For most of the year, heat recovered from the air being
extracted is enough to warm the cold air coming from
the outside to a suitable temperature. If the heat of
extract air is not enough, air coming from the outside
may be heated further with a radiator installed outside
of the unit (for instance 1000 supply air
heater).
2
4
90K SC
ELECTRICAL DIAGRAMS
Internal and external electrical diagram 90K SC
Defrosting by stopping the supply air fan or with preheating radiator
L
2x0,5
m
GND
3
P1
1
2
12V
DC
PDS
2
1 2 3
3
1
5
4
6
CONNECTION BOX
(on top of the unit)
GND
C (1)
T1
1 (2)
L
N
M1
TK
SULAKE
T6,3A
C (1)
T1
12VDC 48VDC
- + - +
1
2
L230VACN
1 2
2 (4)
R3
3
4
+48VDC 3 4
~+
~-
L 16VAC N
5 6
1 2 L1 L2 L L N N
5
6
7
8
9
10
11
12
V
s
r
m
1 N2
sr
m
1 N2
R2
T
P
INTERNAL ELECTRICAL
DIAGRAM OF
THE VENTILATION UNIT
90K SC
5
4
OK
PL
90K SC
HOOD
T
P
M1
L N
R4 R5 R6 R7 R8
2 3
N
VA
(230 V)
3x1,5 S
2V 4V 6V 8V 12V
DC DC DC DC DC
1
b
L
10A
4
Supply air fan
Extract air fan
DC transformer
230 VAC / 16 VAC / 48 VDC
TK
Safety switch
T1
Defrost thermostat
Supply air fan stops at +5 °C
(If a preheating radiator has been mounted,
it switches on at + 5 °C)
R2
Preheating radiator
(optional, mounted at the factory)
R3
2 k resistor
R4-R7 1 k resistor
R8
2 k resistor
OK
Switch
V
Zener diode 12 V
L
12 VDC lamp (filter guard)
PL
Fluorescent lamp PL 11 W
VA
Light switch
PDS
Pressure switch
(option, mounted outside of the unit)
Wires
s = blue
m = black
r = brown
© • We reserve the right to make changes without prior notification.
90K SC
CONTROL DIAGRAM AND DESCRIPTION OF OPERATION
Control diagram 90K SC
DISTRIBUTION PANEL
10 A
230V 50Hz
90K SC
INTERNAL ELECTRICAL AND CONTROL CONNECTIONS
G3
M
TF
LP1
S
G3
H
VENTILATION ZONE
FAN SPEED CONTROL AT COOKER HOOD
LTO
PF
F7
M
TS1
AIR REMOVAL VIA COOKER HOOD
Control of operation
controlled by defrost thermostat TS1. When there is a risk of frosting,
preheating radiator LP1 starts to heat air coming from outside to
the unit, thereby preventing the HR cell from freezing.
The preheating radiator is a PTC resistor, and its power consumption
is affected by the air flow going through the PTC resistor. The PTC
resistor is self-adjusting, i.e. if air flow stops for some reason, the
surface temperature of the PTC resistor does not exceed 100 °C.
You must never touch the PTC resistor when the unit is on, for the
laminas of the PTC resistor are live.
Power supply to the unit can be controlled with the 0/1 switch
in the distribution panel if needed. After starting, the unit operates
at the power selected on the fan speed adjustment switch. There
is also a safety switch TK inside the unit. It stops power supply
when the maintenance door of the unit is opened.
Fan speed adjustment
Cam switch
Fans TF and PF of the unit are controlled depending on operating
conditions with a separate 4-step (1, 2, 3 and 4) speed selector
switch located in the cooker hood.
Alarms
If a pressure difference switch has been mounted outside of the unit,
it controls the pressure difference on the supply or extract air side.
If the pressure difference rises above the setup because of dirty
filters or clogged ducts, the indicator on the cooker hood is lit.
Supply air temperature
The unit does not have a post-heating radiator for controlling the
temperature of supply air. It is possible to connect a separate
supply air heater (e.g. 1000 supply air heater) to the
supply air duct.
Parts list 90K SC
Heat recovery bypass
Code
Summer-time bypass (H) of the heat recovery (HR) cell is done
manually by turning the HR damper in the bypass position for the
summer.
Name
Filter
Heat recovery defrosting
G3
F7
H
HR
The defrost thermostat TS1 of the HR cell stops supply air fan TF,
preventing the HR cell from freezing. The fan starts automatically
as soon as the risk of freezing has passed. The operating point
of the defrost thermostat can be changed, the factory setting is
+5 °C.
The unit can also be equipped with preheating radiator LP1,
PF
TS1
TF
S
LPl
Extract air fan (DC - direct current)
HR defrost thermostat
Supply air fan (DC – direct current)
4-step adjustment switch
Preheating radiator
6
HR bypass damper
Heat recovery cell
Technical data
(factory settings in parentheses)
Standard / Option
Supply air G3 + F7
Extract air G3
Manual
Counter cross flow cell,
efficiency ~ 80%
qv = 83 dm3/s (75 Pa)
Factory setting +5 °C
qv = 72 dm3/s (50 Pa)
1, 2, 3, 4 switch, on the cooker hood
PTC resistor max. 0.9 kW
Standard
Standard
Standard
Standard
Standard
Standard
Standard
Option
© • We reserve the right to make changes without prior notification.
90K SC
INSTALLATION
Installation
Wall mounting
DURING MOUNTING THE UNIT RISES 10
MM HIGHER THAN THE FINAL HEIGHT.
THE LEAD-IN OF ELECTRIC WIRES CAN BE DONE
FROM BOTH SIDES OF THE UNIT.
90K SC is mounted in the kitchen
above the cooker.
Observe!
Minimum distance of grease filter from cooker
is 480 mm
90K SC is mounted on the wall
with a mounting plate as shown in the
adjacent figure.
LOWER EDGE
OF BRACKET
Wall construction
LOWER EDGE
OF BRACKET
CONDENSING WATER
OUTLET AND WATER SEAL
When fixing the unit, take the wall structure into account. Avoid mounting the
unit on a hollow, echoing dividing wall
and on a bedroom wall because of sound
conduction, or prevent sound conduction.
Cooker hood mounting
The cooker hood is mounted at the bottom
of the 90K SC unit with knurledhead nuts (A), which are included in the
accessory bag delivered with the unit.
Open the cooker hood’s bottom plate,
which has the grease filter attached to
it, lift the hood against the bottom of the
ventilation unit and fix the hood with the
knurled-head nuts.
Wall mounting plate
Thread the connection wire (B) as shown
in the picture, and use a wire shield (C)
if needed.
14 pcs
B
B
A
A
C
Damper
Hood connection wire and wire shield
Condensing water outlet
Condensing wire outlet port
Knurled-head nut, hood fixing
© • We reserve the right to make changes without prior notification.
7
90K SC
CONDENSING WATER CONNECTION
Condensing water
The delivery includes a water seal. With a pipe connected to the water seal, water
condensing from extract air can be led to a floor drain (not straight to the drain). The
pipe must not rise after the water seal. The unit has to be mounted level with the horizontal
in order to ensure that condensing water can get out of the unit.
ATTENTION!
There must always be a separate outlet valve in the kitchen.
Basic air extraction is not possible through the hood when 90K SC is used.
The cooker hood is used for boosted smoke abatement.
600
min 1235
min. 350
Airflow Developments Limited. Aidelle House, Lancaster Road,
Cressex Business Park, High Wycombe, Bucks. HP12 3QP
T: + 44 (0) 1494 525252
F: + 44 (0) 1494 461073
E: info@airflow.com
W. www.airflow.com
© • We reserve the right to make changes without prior notification.
1.09.351E/05.09.06/PDF
ATTENTION!
Minimum distance of grease filter from
cooker 480 mm