Vallox Digit 2 SE Series User manual

DIGIT2 SE R
DIGIT2 SE L
DIGIT2 SE VKL R
DIGIT2 SE VKL L
DIGIT2 SE MLV VKL R
DIGIT2 SE MLV MLV L
DIGIT2 SE MLV electric R
DIGIT2 SE MLV electric L
Models:
© VALLOX • We reserve the right to make changes without prior notification.
TECHNICAL SPECIFICATION
• 1.09.391E
• 11.2.2011
• Code 3550 SE
© VALLOX
Electrical connection 230 V, 50 Hz
Class of protection IP34
Fans Extract air 210 kW 0.91 A (AC) 120 dm3/s (120 Pa)
Supply air 210 W, 0.91 A (AC) 110 dm3/s (100 Pa)
Heat recovery Cross-flow cell, ␩> 60%
VALLOX DIGIT2 SE 2.7 kW, 12.0 A
Preheating unit Electric 1200 W, 5.2 A
Post-heating unit Electric 1200 W, 5.2 A
VALLOX DIGIT2 SE VKL 1.55 kW, 6.7 A
Preheating unit Electric 1200 W, 5.2 A
Post-heating unit VKL water radiator
VALLOX DIGIT2 SE MLV VKL 0.35 kW, 1.5 A
Preheating unit MLV liquid radiator
Post-heating unit VKL water radiator
VALLOX DIGIT2 SE MLV, electric 1,55 kW, 6,7 A
Preheating unit MLV liquid radiator
Post-heating unit Electric 1200 W, 5.2 A
Filters Supply air G3 and F7
Extract air G3
Weight 71 kg
Ventilation Control panel control
adjustment options Week-clock control
CO2and %RH control (option)
Wireless remote control (option)
Options CO2sensor
%RH sensor
Wireless remote control
Filter guard (supply and/or extract air)
LON converter
Ceiling mounting
Attic floor penetration
Silencer element
VKL expansion tank + stand
VKL heat exchanger pipe
• Supply and extract air ventilation
with heat recovery
• Silent operation
• Energy-efficient unit; high-efficiency
cross-flow cell
• Electronic DIGIT SED control or
wireless remote monitoring (option)
• Week clock control
• Humidity control (option)
• Carbon dioxide control (option)
• Maintenance reminder
• Summer/winter automation
• Fireplace/booster switch function
• Good filtering
• Fixed air flow measuring outlets
• MLV model especially designed for
use with ground heat systems
• Easy and quick installation
• Silencer element (option)
DIGIT SED
ELECTRONIC CONTROLLER
WITH LCD DISPLAY
Vallox
SE
2
Digit

12
5
4
19
20
1
2
3
4
6
7
9
13
8
10
11
21
5
Dimensions and duct outlets
Duct outlets
Inner diameter of collar
ø 160 mm + connector outlets
VALLOX DIGIT2 SE models
Code: 3550 SE
VALLOX DIGIT2 SE
• Preheating radiator: electric, 1200 W
• Post-heating radiator: electric, 1200 W
VALLOX DIGIT2 SE VKL
• Preheating radiator: electric 1200 W
• Post-heating radiator: VKL water radiator
Main parts
12
13
15
10
10
11
11
14
14
16
17
18
1
2
3
4
5
6
7
8
9
19
Extract air fan 210 W/0.92 A,
alternating current (AC)
Supply air fan 210 W/0.92 A,
alternating current (AC)
Electrical quick-connect terminal for fan
Preheating unit
(electric 1.2 kW or liquid)
Post-heating unit
(electric 1.2 kW or water)
Heat recovery cell
Outdoor air filter F7
Outdoor and extract air prefilter G3
Summer/winter damper
Maintenance switch
Connection box cover plate
Self-actuated one-way dampers
(only in VKL and MLV models)
Plug 1.8 m
Humidity sensor (option)
Control panel
CO
2
sensor (option)
LON converter (option)
Air flow measuring outlets
(behind cover plate)
Water radiator actuator/valve
Connection ø 12
MLV connection ø 10 cu
20
21
Supply air to the dwelling
Extract air from the dwelling
Outdoor air to the unit
Exhaust air outside
4
3
2
1
Model R
Exhaust air outside
Outdoor air to the unit
Extract air from the dwelling
Supply air to the dwelling
4
3
2
1
Model L
Supply liquid/water
Return liquid/water
B
A
596
616
541 616
17
541
569 15
1
2
3
4
104131.5125131.5104
173.1211
54 19
40.9 28 40.9
28
19
54
52 R1/2
3
4
2
1
B
ABA
© VALLOX • We reserve the right to make changes without prior notification.
VALLOX DIGIT2 SE/VKL/MLV
DIMENSIONS AND MAIN PARTS
2
2
14 15 16 17
The picture shows VALLOX DIGIT2 SE
model R (electric radiator model). VKL/MLV model units
18
VALLOX DIGIT2 SE MLV VKL
• Preheating radiator: MLV liquid radiator
• Post-heating radiator: VKL water radiator
VALLOX DIGIT2 SE MLV, electric
• Preheating radiator: MLV liquid radiator
• Post-heating radiator: electric, 1200 W
The letter L or R after the name of the unit indicates whether the unit is
left- or right-handed.

Pressure loss in ducts. Total pressure.
Volume flow rate
E = Extract air fan
S = Supply air fan
E = Extract air fan
S = Supply air fan
Pressure loss in ducts. Total pressure.
Volume flow rate
ED and SD are examples of pressure
losses in supply and extract ducts
SFE 2.5 kW/m3/s
12345678
E
E
E
E
E
E
E
E
S
S
S
S
S
S
S
S
dm3/s
m
3
/h
10 20 30 40 50 60 70 80 90 100
50
110 130
100 150 200 250 300 400 450 500
120
350
100
50
150
200
250
300
350
0
At a lower total pressure, SFP
will be smaller at this speed.
© VALLOX • We reserve the right to make changes without prior notification.
Air flows/DIGIT2 SE (electric radiator unit, winter setting)
Measuring points after the connection
outlet. Fan curves indicate the total
pressure available for duct losses.
VALLOX DIGIT2 SE/VKL/MLV
PERFORMANCE
3
1
2
3
4
5
6
7
8
Fan speeds Fan input
power
W
60
80
100
120
140
160
180
230
42
67
97
130
167
205
242
315
Control
voltage
(V)
Air flows/DIGIT2 SE VKL (liquid radiator unit, winter setting)
NOTE!
If the unit has a post-heating
radiator, it must be selected
when the system is adjusted.
Air flow measurement outlets
The fixed air flow measurement outlets
are located behind the cover plate.
You can measure the total pressure of
the supply and extract air ductwork at
the measurement outlets using a
pressure gauge.
Compare the pressure readings with the
air volume curves to see unit air flows
at various adjustment positions.
The red measurement hose gives the
pressure reading for the supply air
ductwork and the black hose the
pressure reading for the extract air
ductwork. Observe unit model and
setting (summer or winter).
SFP (Specific Fan Power)
guideline value < 2.5 (kW/m3/s) SFP = Air flow (max.) (dm3/s)
Input power (total) (W)
ED and SD are examples of pressure
losses in supply and extract ducts SFP (Specific Fan Power)
guideline value < 2.5 (kW/m3/s)
Supply air Extract air
SE
ED is an example
of pressure loss
in extract ducts
Extract air flow during heat recovery bypass (summer setting)
Pressure loss in ducts. Total pressure Pa
Volume flow rate
dm3/s
m
3
/h
100
50
150
200
250
300
350
PK
dm3/s
m3/h
10 12
20 30 40 60 70 80
34567
090
50
8
110 130
100 150 200 250 300 350 400 450 500
50 100 120
SD ED
100
50
150
200
250
300
350
10 20 30 40 50 60 70 80
090 100
50
8E
7E
6E
5E
4E
3E
2E
1E
110 120 130
400 450 500
5S
8S
7S
6S
4S
3S
2S
1S
At a lower total pressure, SFP
will be smaller at this speed.
SFP 2.5 kW/m3/s
dm3/s
m
3
/h
SD
ED
100 150 200 250 300 350
ED
RECOMMENDED
OPERATING RANGE
RECOMMENDED
OPERATING RANGE
RECOMMENDED
OPERATING RANGE

VALLOX DIGIT2 SE/VKL/MLV
PERFORMANCE
4© VALLOX • We reserve the right to make changes without prior notification.
63
125
250
500
1000
2000
4000
8000
LW, dB
LWA, dB(A)
LpA, dB(A)
1
15,2
64,1
52,3
42,8
42,8
39,8
29,4
24,6
64,4
44,7
Digit2 SE
AP
qV, dm3/s 2
25,8
68,7
58,4
49,7
46,6
51,1
37,3
32,9
23,2
69,2
52,6
3
36,1
71,2
62,6
54,8
51,0
52,9
43,8
39,4
31,5
71,9
55,9
4
48,3
74,4
68,0
58,1
54,0
55,6
48,1
43,8
39,4
75,5
59,3
5
59,2
73,3
68,3
61,1
56,8
58,0
51,6
47,0
42,8
74,9
61,7
6
70,5
77,0
69,5
63,7
59,1
59,2
55,0
49,9
45,8
78,0
63,7
7
79,1
77,2
70,6
65,3
61,0
60,3
58,4
51,9
47,9
78,5
65,5
8
89,8
78,2
72,8
67,5
63,5
61,8
61,0
54,3
50,7
79,8
67,6
56,3
50,0
39,8
34,3
34,2
27,0
57,3
39,5
63,4
56,7
47,0
40,2
39,4
33,9
25,2
64,4
45,9
66,8
61,4
52,1
44,2
42,7
38,9
31,5
68,0
50,1
66,3
62,9
55,4
46,7
45,0
42,3
34,4
24,3
68,2
52,5
64,1
63,4
59,9
48,7
46,8
45,0
37,1
26,5
69,1
54,2
70,2
65,2
60,0
50,6
48,1
47,1
39,2
32,5
71,8
56,1
70,4
66,9
62,2
52,9
50,2
49,5
41,9
36,3
72,5
58,2
50,3
39,4
31,6
30,3
25,9
17,4
50,8
32,1
1
23,7 2 33,3 3 42,2 4 54,5 5 68,5 6 82,7 7 92,1 8 109,0
11,8
1
20,3 / 23,2
23,7
2
32,1 / 35,1
32,8
4
56,8 / 61,2
36,2
5
68,4 / 74,4
38,5
6
78,4 / 86,2
40,7
7
86,2 / 95,7
42,9
8
97,3 / 109,0
28,9
3
44,5 / 47,8
AP
supply/extract,dm3/s
Sound values Sound power level from the ventilation unit
to supply air ducts by octave band Lw, dB
ADJUSTMENT POSITION / AIR FLOW
Sound power level from the ventilation unit
to extract air ducts by octave band Lw, dB
ADJUSTMENT POSITION / AIR FLOW
Medium
frequency
of the octave
band, Hz
ADJUSTMENT POSITION / AIR FLOWS (supply / extract)
A-weighted sound pressure level dB (A) coming from
the unit through the envelope in rooms where
the unit has been installed (10 m2sound absorption)

VALLOX DIGIT2 SE/VKL/MLV
1 2 3 4
5 6 7 8
Keyboard
Main display
Paneelin osoite
1
Panel address
1
Control
VALLOX DIGIT SE can be controlled with the control panel coming with the unit (3 at most) and with
optional CO2(5 at most) and %RH sensors (2 at most). Fan speeds of the unit can be controlled via
remote monitoring with a voltage or current signal. In case of disturbances, a potential-free relay
contact signal is issued.
With an optional VALLOX LON converter, the whole operation of the unit can be controlled via remote
monitoring.
Week clock control
The week clock in the control panel of the unit can be used to programme the desired fan power
option (1…8) for each hour in the day.
21 C
3
10:20
Fan speed can be changed in this display with the + and – buttons
3
Scrolling up
With this button, you can scroll
the displays upward.
Scrolling down
With this button, you can scroll
the displays downward.
Increase button
With this button, you can increase values.
Decrease button
With this button, you can decrease
values.
Start button
With this button, you switch the unit on and off. When the
indicator is lit, the unit is on.
Carbon dioxide adjustment
With this button, you set carbon dioxide adjustment on
and off. When the indicator is lit, the adjustment is on.
Humidity adjustment
With this button, you set humidity adjustment on and off.
When the indicator is lit, the adjustment is on.
Post-heating
With this button, you set post-heating on and off. When
the indicator is lit, post-heating is on. The summer function
is active when the indicator is not lit.
1
2
3
4
5
6
7
8
Fan speed (3).
Supply air temperature (21 °C).
Post-heating is on.
Time.
Filter guard alert.
Maintenance reminder alert.
Fireplace / booster switch on. The fireplace /
booster switch is activated in this display by
simultaneously pressing down the + and – buttons
for 2 seconds.
Week clock control on.
21 C
10:20
Mounting, removing and wiring of control panel
The control panel is wired straight from the electrical connection box. The control panel can
also be connected in series with a CO2sensor or another control panel. (See External
electrical connections on page 8).
Control panel addresses
If two or more control panels are connected to the system, the addresses of the control panels
need to be changed.
E.g. 3 control panels.
• Connect the first control panel to the unit and change its address to 3.
• Connect the second control panel to the unit and change its address to 2.
• Connect the third control panel and make sure that its address is 1.
If control panels have the same address, they go to bus fault state. In this case, remove one of the control panels
and change the address of the other panel. The above mentioned situation can arise in connection with the later
installation of an additional control panel.
Control panel
Surface mounting
of control panel
A control panel is mounted
on the wall or on a 1-part
instrument box.
Wiring
Width 90 mm
Height 110 mm
Depth 23 mm Electronics board of control panel
1 = orange 1 = +
2 = white 1 = –
3 = orange 2 = A
4 = white 2 = B
5 = metal = signal ground
ca. 21 VDC
}
Cable:
NOMAK 2 x 2 x 0.5 mm2+ 0.5 mm2
NOTE!
Faulty coupling of the (+) wire
destroys the control panel!
12345
+ – A B M
© VALLOX • We reserve the right to make changes without prior notification.
VALLOX DIGIT SED CONTROL PANEL
5

VALLOX DIGIT2 SE/VKL/MLV
Surface mounting Wiring
Cable:
NOMAK 2 x 2 x 0.5 mm2+ 0.5 mm2
Base plate of the CO2sensor Electronics card of the CO2sensor (model may vary)
NOTE!
Faulty coupling of the (+) wire destroys
the carbon dioxide sensor!
1 = orange 1 = +
2 = white 1 = –
3 = orange 2 = A
4 = white 2 = B
5 = metal = signal ground
ca. 21 VDC
}
14
125
38
76
Connecting two or more
units (slave unit)
Connect slave units as
specified in the adjoining
connection instructions.
Slave units do not operate
independently, but follow the
instructions received from the
host unit. Neither control
panel nor sensors must be
connected to a slave unit.
NOTE! + wire must not be connected to a SLAVE UNIT. SLAVE UNIT must not have a 6K8 resistor in place.
SLAVE UNIT TERMINAL BLOCKHOST UNIT TERMINAL BLOCK SLAVE UNIT TERMINAL BLOCK SLAVE UNIT TERMINAL BLOCK
HUMIDITY SENSORS
• When mounting two or more humidity
sensors, connect them to the terminal
block of the connection box by connec-
ting the first humidity sensor to %RH1,
in place of the 6K8resistor in the termi-
nal block (remove the resistor in this ca-
se), and the second humidity sensor to
%RH2. See the electrical diagram.
CARBON DIOXIDE SENSORS
• Carbon dioxide sensors are connected
individually.
• When the first carbon dioxide sensor has
been connected to the system, the unit is
switched on. After this, the unit gives the
sensor an address. Follow the same steps
for other carbon dioxide sensors.
S +
The sensor is wired straight from the electrical connection box of the unit.
The CO2sensor is connected directly from the connection box of the unit, or in series with
another CO2sensor or control panel (see External electrical connections on page 8).
Surface mounting Wiring
Cable:
2 x 0.5 mm2
Electronics board of
%RH sensor
Base plate
of sensor
14
125
38
76
Mounting and wiring of humidity sensor
Mounting and wiring of carbon dioxide sensor
1 2 3 4 5
+ – A B M
© VALLOX • We reserve the right to make changes without prior notification.
2
6
SENSORS

VALLOX DIGIT2 SE/VKL/MLV
Silencer unit
VALLOX DIGIT2 SE
596
569
min. 1234
616
Sound values Digit 2 E + silencer unit
64 67 69 72 72 74 77 76
51 57 61 66 69 68 69 70
39 45 49 53 56 58 60 62
25 31 35 38 41 43 45 48
10 21 21 24 26 29 31 34
* * * 1311171821
* * * * 14 19 22 24
*******23
64 67 70 73 74 75 77 77
37 43 46 50 53 54 55 56
54 61 65 68 69 71 71 74
* 40525659606365
22 34 42 47 51 54 56 59
* 18263237404245
* * 11 21 28 32 36 39
* * * * 12 18 23 28
*******16
********
54 61 65 68 70 71 72 74
24 32 39 43 46 48 50 53
12345678
20/25 31/37 43/50 55/64 66/77 76/89 84/99 95/112
20 26 31 34 37 40 41 44
Pressure loss in ducts. Total pressure Pa
Volume flow rate
VALLOX silencer unit + DIGIT2 SE
(winter setting)
SFP 2,5 kW/m3/s
© VALLOX • We reserve the right to make changes without prior notification.
PERFORMANCE/VALLOX SILENCER UNIT
5
63
125
250
500
1000
2000
4000
8000
LW, dB
LWA, dB(A)
1
16/24
2
25/47
3
36/70
4
48/90
5
58/104
6
68/116
7
75/131
8
87/148
1
25/7
2
38/7
3
46/46
4
59/69
5
72/79
6
82/106
7
92/112
8
104/141
LpA, dB(A)
AP
qV, dm3/s
AP
supply/extract,dm3/s
ED and SD are
examples of
pressure losses in
supply and extract
ducts.
100
50
150
200
250
300
350
SD
ED
dm
3
/s
m
3
/h
10
12
20 30 40 50 60 70 80
E – Extract air fan
S – Supply air fan
34567
0
90 100
50
8
110 120 130
100 150 200 250 300 350 400 450 500
RECOMMENDED
OPERATING RANGE
At a lower total pressure, SFP
will be smaller at this speed.
2S
3S
1S
4S
5S
6S
7S
8S
1E
2E
3E
4E
5E
6E 7E
8E
Sound power level from the ventilation unit
to supply air ducts by octave band Lw, dB
ADJUSTMENT POSITION / AIR FLOW
Sound power level from the ventilation unit
to extract air ducts by octave band Lw, dB
ADJUSTMENT POSITION / AIR FLOW
Medium
frequency
of the octave
band, Hz
ADJUSTMENT POSITION / AIR FLOWS (supply / extract)
A-weighted sound pressure level dB (A) coming from
the unit through the envelope in rooms where
the unit has been installed (10 m2sound absorption)

VALLOX DIGIT2 SE/VKL/MLV
© VALLOX • We reserve the right to make changes without prior notification.
INTERNAL ELECTRICAL DIAGRAM
8
H
TK
U1 U3
L2 N4
3
pu/s
FAULTSIGNAL
L
NC
Post-heating electric
radiator
40°C
CONNECTION BOX (inside the unit)
ke-vi
80°C
4
80°C
R1
T1
5
m
3R
CONNECTION BOX (on top of the unit)
+
S
GND
m
-
FREEZING PROTECTION (EXHAUST AIR) SUPPLY AIR TO DWELLING OUTDOOR AIR TO UNIT EXTRACT AIR FROM DWELLING
+ A B
PWM1 PWM2
S PRESSURE SWITCH S RH2
T2
S RH1
L N
NO
2
N
230 V 180 V 160 V
RH1
L
NO
140 V 120 V 100 V
80 V
60 V
30°C
55°C
M
3L
RH2
55°C
N
1
3
4
5
A
6
L
2
7
S+S
ke
s
L1
R2
A-++
pu
N
T1
T2
LN +S 21 S GND
m
M
B
vio
ha
r
va
ro
vi
N L2
Water radiator
actuator (VKL
models)
V
H
RS-485 BUS
PM
P1
P2
89
NC
NTC SENSORS
MOTHER CARD
FUSE T800mA
FAULT SIGNAL FAULT SIGNAL FIREPLACE SWITCH REMOTE MONITORING
1
10
2
3
4
5
6
7
89 1
10
16x0.25mm2
12
A
23
4
REMOTEMONITORING
0-10V DCor 0-20mA
ha/ro
L
6
7
FIREPLACESWITCH
6
va/vi
va/ke
R
ke/r
r/vi
7
5
7018800
21
N
K
K
12
r
s
m
r
2N 12N 1
8 x 1s
1
ha
r
ha
r
VALLOX DIGIT2 SE
Damper motor connection
3R = R model
3L = L model
E
S
m
s
ke-vi
S Supply air fan
E Extract air fan
M Autotransformer with
protective voltage coil
K Capacitor
H Interference suppressor
L Earthed cord
TK Safety switch
V Water radiator actuator/valve
T1 Safety thermostat of heating radiator
T2 Overheating protector 2 pcs
R1 Post-heating radiator
R2 Preheating radiator
PM Damper motor 21 V DC
P1 Filter guard, option (supply)
P2 Filter guard, option (extract)
Wire colours
s = blue
m = black
r = brown
vi = green
ke = yellow
pu = red
ro = rose
va = white
ha = grey
vio = violet
CONTROL VOLTAGE OF FANS / CURRENT
SIGNAL SELECTION WITH JUMPER A
Electric preheating
radiator
USE OF JUMPER IN VOLTAGE SIGNAL
CONTROL (FACTORY SETTING) USE OF JUMPER IN CURRENT SIGNAL CONTROL

VALLOX DIGIT2 SE/VKL/MLV
© VALLOX • We reserve the right to make changes without prior notification. 9
External electrical connection VALLOX DIGIT2 SE
VALLO X DIGIT2 SE
EXTERNAL ELECTRICAL DIAGRAM
LON CONVERTER
OPTION
NOTE!
Faulty coupling of the + wire
DESTROYS THE CONTROL PANEL.
CONTROL PANEL 1
ONE OR MORE, 1 AS STANDARD
NOTE!
Faulty coupling of the + wire
DESTROYS THE SENSOR.
CO2 SENSOR 1
ONE OR MORE
OPTION
HUMIDITY SENSOR %RH2
OPTION
THE FIRST SENSOR IS
CONNECTED TO REPLACE THE
R6k8 RESISTOR.
HUMIDITY SENSOR %RH1
OPTION
BLACK = M
WHITE 2 = B
ORANGE 2 = A
WHITE 1 = -
ORANGE 1 = +
FAULT SIGNAL MAX.
1 A, 24 VDC
(POTENTIAL-FREE
CONTACTS)
FIREPLACE SWITCH
pressure switch
(self-resetting)
0-10 VDC
(10 VDC, 20 mA)
or
0-20 mA
REMOTE MONITORING
(SHORT-CIRCUIT WIRE HAS TO BE
REMOVED BEFORE CONNECTION)
CONNECTION BOX (on top of the unit)
FAN CONTROL FIREPLACE
SWITCH FAULT SIGNAL RS-485 BUS
PLUG CONNECTION 10A/16 A
16 A WHEN THE UNIT IS EQUIPPED WITH ELECTRIC PRE- AND POST-HEATING
1.8 m FROM THE TOP OF THE UNIT
SOLENOID VALVE
CIRCULATION PUMP
CONTROL OF EXTERNAL SOLENOID VALVE
AND CIRCULATION PUMP IN MLV UNIT

VALLOX DIGIT2 SE/VKL/MLV
© VALLOX • We reserve the right to make changes without prior notification.
POST-HEATING/VKL RADIATOR PERFORMANCE
10
VALLOX DIGIT2 SE/performance of VKL post-heating radiator
Temperature of air coming to the radiator 12 °C
liquid flow 0.05 dm3/s
liquid flow 0.03 dm3/s
Power of VKL water radiator Pressure loss in VKL water radiator
Radiator pressure loss, kPa
10
5
15
20
25
0
0.06
Water flow, dm
3
/s
30
0.08
0.04
0.02
0
Pressure loss in the valve
0.3 0.4
Liquid flow dm
3
/s
0.20.02 0.03 0.04 0.05 0.06 0.08 0.10.01
1 2 3 4 567
0.25 0.5 0.75 1.00 1.25 1.45 1.55 1.7
17.5=open
Adjustment position
Kv value
Pressure loss p kPa
Cooling of water in the radiator
0.5
0.25
0.75
1.0
1.25
0
15
10
5
0
Cooling of water in the radiator °C
Total power of the radiator kW
50 dm
3
/s
0.5
0.25
0.75
90 dm
3
/s
Air flow
1.0
1.25
0
25 30 20
15
12
30 dm
3
/s
70 dm
3
/s
Temperature of air going out of the unit °C
Total power of the radiator kW
45 °C
35 °C
25 °C
Temperature of
water coming to
the radiator
Temperature of air coming to the radiator 12 °C
liquid flow 0.05 dm3/s
liquid flow 0.03 dm3/s