Page 1
Vallox
Code
3561
Models
VALLOX 121 MC R
VALLOX 121 MC L
© Vallox
1.09.420 EN
14.5.2013
1 Extract air fan
2 Supply air fan
3 Post-heating radiator
(electric 900 W)
4 Heat recovery cell
5 Outdoor air fi lter F7
6 Outdoor air fi lter G4
7 Extract air fi lter G4
8 Automatic summer/winter damper
9 Safety switch
10 Measurement outlets
(behind an opening door)
11 Adjustment of the relationship
between supply and extract air
12 Adjustment of post-heating
13 Speed selector switch
(1–4, option)
12 1
MC
Low-energy ventilation
unit with heat recovery
Operating, maintenance and technical instructions
10
87
9
11
12
6
5
4
3
2
1
13
TECHNICAL DATA
Electrical connection 230V 50Hz = 5.7A
Degree of protection provided by enclosures IP 34
Fans Extract air 0.119 kW 0.9A 105 dm³/s 50Pa
direct current (DC) Supply air 0.119 kW 0.9A 101 dm³/s 50Pa
Heat recovery Cross-counter fl ow heat recovery cell, η >80%
Heat recovery bypass Automatic
Electric post-heating unit 900 W, 3.9 A
Fans Supply air G4 and F7
Extract air G4
Weight 60 kg
Ventilation control Simple Control controller (option)
PTXPA Slim-Line SC cooker hood (option)
Fireplace switch (option)
The fi gure shows the R model
Page 2
Vallox
12 1
Fireplace switch, fl ush
mounting (option)
MC
Adjustment of supply
air temperature
Supply and extract
air fl ow adjustment
potentiometer
OPERATING INSTRUCTIONS
Fan speed adjustment
The fan speed of Vallox ventilation unit can be controlled with a control switch (option), with
a separate cooker hood (option) or directly with a 0-10 V voltage signal.
Speeds 1, 2, 3 and 4 can be selected at the control switch:
1. Operation during absence. When the dwelling is empty, ventilation can be reduced
temporarily.
2–3. Normal operation. In normal operation, air has to be replaced once every two hours.
4. Boosted operation. Cooking, taking a sauna bath, washing, drying clothes, using the
toilet, having guests or a corresponding situation may cause a need for higher ventilation than in normal operation.
Four-step control switch
(option)
Cooker hood PTXPA-SC
(option)
Adjustment of supply air temperature
and summer/winter function
The temperature of air coming to the dwelling can be adjusted between circa +10 °C and
+30 °C. The midpoint of the adjustment range is circa +20 °C. When supply air temperature
adjustment has been turned in the OFF position, post-heating is not active. This means that
summer function is activated for the ventilation unit. The unit has a motorised summer/winter
function. When the summer function is on, the heat recovery cell is bypassed as soon as outdoor
air temperature has risen above +14 °C. When outdoor air temperature goes below +12 °C,
the unit starts to recover heat. When supply air temperature adjustment is in the AUTO position,
automatic function is activated for the unit. In this case, the setpoint for post-heating is +17 °C
and the heat recovery cell is bypassed automatically according to outdoor temperatures as
indicated above. When the unit bypasses the heat recovery cell, in which case summer function
is activated, post-heating is off.
Fireplace switch function
It is possible to connect a timer-operated switch to the unit. The switch stops the extract air fan
during the time when the fi replace is heated. NOTE! The starting of the extract air fan may
weaken draught in the replace! In winter, this situation may disturb the winter function of the unit.
The situation will normalise in a while, after the fi replace function stops.
Winter function of ventilation unit
A threshold value has been set at the factory for the freezing of the heat recovery cell. When the
threshold is exceeded, the ventilation unit starts to melt the heat recovery cell. Melting is done
by stopping the supply air fan.
A normal melting period takes from 15 to 45 minutes depending on the extent of ice on the heat
recovery cell and on the amount of extract air fl ow.
The unit has two different choices for the winter function. One choice is meant for very wet
conditions (for instance swimming hall) and the other for normal operation in dwellings and
detached houses.
The factory setting is normal winter function for dwellings and detached houses.
This appliance can be used by children
aged from 8 years and above and
persons with reduced physical, sensory or
mental capabilities or lack of experience
and knowledge if they have been given
supervision or instruction concerning
use of the appliance in a safe way and
understand the hazards involved.
Children shall not play with the appliance.
Cleaning and user maintenance shall not
be made by children without supervision.
2
Adjustment of the relationship between supply and extract air
This feature may be useful when adjusting air fl ows at the valves during mounting. After the
valves have been adjusted, a user does not need, and must not, touch the adjustment. When
needed, supply or extract air fl ow can be reduced at the potentiometer. When the potentiometer
is approximately halfway, supply and extract air fl ow have not been reduced. Turning the
potentiometer anticlockwise reduces the air ow on the supply side, and turning it clockwise
reduces the air fl ow on the extract side.
Maintenance reminder
The unit reminds of the need for maintenance every six months if an indicator (not standard) has
been connected to the connectors of the fault signal relay. The indicator then blinks at one-second
intervals. The maintenance reminder is reset when the door of the ventilation unit is opened. See
the maintenance instructions for information on the necessary maintenance activities.
© VALLOX • We reserve the right to make changes without prior notice.
What the units include can vary depending on the sales area.
Page 3
Vallox
OPERATING INSTRUCTIONS
Troubleshooting
When a fault described in the table
appears, the unit indicates of the fault
with a fault signal relay, indicator light
and LED on the circuit board. The
number of blinks reveals the fault in
question
Led
blinks
1
2
3
4
5
6
7
8
Problem Repair
Supply air sensor after the HR cell is
faulty
Extract air sensor is faulty Check the sensor and conductors, replace if needed
Supply air sensor is faulty Check the sensor and conductors, replace if needed
Exhaust air sensor is faulty Check the sensor and conductors, replace if needed
Outdoor air sensor is faulty Check the sensor and conductors, replace if needed
Supply air fan has stopped Check the wiring of the fan, replace the fan if needed
Extract air fan has stopped Check the wiring of the fan, replace the fan if needed
EEPROM faulty Replace the circuit board of the unit with a new one
Check the sensor and conductors, replace if needed
12 1
MAINTENANCE
Before starting maintenance operations
Disconnect the plug of the VALLOX 121 MC unit before starting maintenance operations.
When you open the VALLOX 121 MC unit, the security switch (S) turns voltage off. In spite of this, disconnect the plug of the unit.
MC
Filters
When the maintenance reminder gives an alarm, the cleanliness of the
fans must be checked. Outdoor air is ltered in the unit with two kinds
of filters. A coarse filter (A) filters off insects, heavy pollen and other
dust. An F7 class fine filter (B) filters off fine dust invisible to the eye.
Extract air is filtered with a coarse filter (C).
By using original Vallox filters you ensure good operation of the
ventilation unit and the best filtering result. The replacement interval
of filters depends on dust content in ambient air. It is recommended to
replace fans in spring and autumn, but at least once a year.
S
A
C
B
D
Heat recovery cell
Check the cleanliness of the heat recovery cell D at one-year intervals.
NOTE! The laminas of the cell are very thin and get easily damaged.
The correct way of removing the cell is to put your hands behind the
cell and slowly pull it off. If the cell is dirty, soak it in a solution of water
and washing-up liquid. Rinse the cell clean with a jet of water. When
all the water has drained from between the laminas, the cell can be
remounted to the unit. Before mounting check the seals. Check that
the seal does not start “rolling” with the cell when you push the cell in
place.
Fans
Check the cleanliness of the fans when carrying out maintenance for
a filter and the heat recovery cell. Clean the fans if needed. The fans
can be removed from the unit for cleaning. The fan blades can be
cleaned with compressed air or with a brush. Do not remove or move
the balancing pieces on the fan blade.
Removing supply fan (T)
Before removing the supply fan, remove the HR cell (D) by pulling
carefully. Place a thin sheet board or paper under the fan in order to
prevent the bottom tank from being scratched when removing the fan.
Unfasten the xing screw of the fan (H, hex socket-head cap screw AV
4 mm) and place the fan on the bottom tank. Rotate the fan (model R
anticlockwise, model L clockwise) and slide the fan along the bottom
tank. Unfasten the quick couplings of the fan wires and lift the fan off.
Check that the collar rubber is in place before mounting the fan back
in place.
Removing extract air fan (P)
Before removing the extract air fan take out the coarse lter (C), ne
filter (B) and HR cell (D) by carefully pulling them and remove the
maintenance door (F), fixed with two screws. Place a thin sheet board
or paper under the fan in order to prevent the bottom tank from being
scratched when removing the fan. Unfasten the fixing screw of the fan
(H, hex socket-head cap screw AV 4 mm) and place the fan on the
bottom tank. Rotate the fan (model R clockwise, model L anticlockwise)
and slide the fan along the bottom tank. Unfasten the quick couplings
of the fan wires and lift the fan off. Check that the collar rubber is in
place before mounting the fan back in place.
© VALLOX • We reserve the right to make changes without prior notice.
What the units include can vary depending on the sales area.
3
Page 4
Vallox
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MC
Condensing water outlet
70
During the heating season, humidity of extract air condenses into
condensing water. Water formation can be abundant in new buildings
or if ventilation is low compared to the humidity build-up caused by
the residents. Condensing water needs to flow out from the ventilation
unit without hindrance. In carrying out maintenance, for instance in
autumn before the beginning of the heating season, make sure that the
condensing water outlet (L) in the bottom tank is not clogged. You can
check it by pouring a little water in the tank. Clean if needed. Do not
let water flow into electrical devices.
MAINTENANCE INSTRUCTIONS
Replacing post-heating
radiator
First remove the HR cell (D) from the unit by pulling it carefully. Remove
the NTC sensor from the cover lid (C) by pulling. Open the fastening
screws of the cover lid (C) and remove the lid. Open the fastening
screw (G) of the post-heating radiator, lift the post-heating radiator out
of its holder and take it out through the cover lid. Assembling takes
place in the opposite order.
4
© VALLOX • We reserve the right to make changes without prior notice.
What the units include can vary depending on the sales area.
Page 5
Vallox
TECHNICAL DATA
Dimensions and duct outlets
Measuring points
Measuring points after the connection outlet.
Fan curves indicate the total pressure available
for duct losses.
70 mm installation space
The figure shows the R model
Supply/extract air flows
Supply air
Extract air
ES
12 1
Input powers of fans
Fan control
voltage
(V)
4 25 18
5 36 27
6 45 37
7 56 56
8 70 81
9 83 116
10 93 159
11.2 104 215
Extract
air flow
(l/s)
MC
Combined
input power
of fans
W
Model: R
Model: L
Duct outlets
Inner diameter of female
outlet collar
1. Supply air to the dwelling
2. Extract air from the dwelling
to the unit
3. Outdoor air to the unit
4. Exhaust air out
P = Extract air fan
T = Supply air fan
Pressure loss in ducts. Total pressure
Input power (total) (W)
SFP =
Air flow (max) (dm
Sound values
Sound power level in supply air duct (one duct)
by octave band L
Adjustment position
Air flow dm3/s
Medium
frequency of the
octave
band Hz
63 63 72 73 77 80 83 84 87 51 54 57 60 64 64 68 71
125 53 59 63 66 69 73 75 79 44 48 51 55 59 62 64 67
250 45 50 53 57 62 65 68 70 38 41 43 49 53 56 58 60
500 40 45 47 51 55 58 61 63 26 32 34 38 42 45 48 50
1000 39 46 49 54 57 59 60 62 22 27 30 34 37 39 42 43
2000 32 40 45 51 55 58 61 64 * 18 22 27 31 34 36 39
4000 18 29 35 41 46 50 52 55 * * * 14 19 24 27 29
8000 * * 22 31 38 42 45 49 * * * * * * * *
,dB
L
W
L
, dB(A)
WA
LpA, dB (A) 26 30 32 35 40 42 45 47
ADJUSTMENT POSITION/AIR FLOW dm
4.0 5.0 6.0 7.0 8.0 9.0 10.0 11.2 4.0 5.0 6.0 7.0 8.0 9.0 10.0 11.2
17.2 29.4 39.8 51.1 65.6 73.1 78.9 91.6 25.2 35.5 44.9 56.3 61.9 75.6 82.6 94.5
63 72 73 78 80 83 85 88 52 55 58 61 65 67 70 73
44 51 55 59 63 65 68 70 32 36 39 44 47 50 53 55
Sound pressure level coming from the unit through
the envelope in the rooms where the unit has been installed
4.0 5.0 6.0 7.0 8.0 9.0 10.0 11.2
24/26 33/34 40/42 50/51 62/62 71/71 82/82 92/92
(10m
ADJUSTMENT POSITION/AIR FLOW dm3/s
W
2
sound absorption)
, dB
3
/s)
SFP (Specific Fan Power) recommended value <2.5 (kW m3/s)
At a lower total pressure, SFP will be smaller at the same speed
Volume flow rate
Sound power level in extract air duct (one duct)
by octave band L
3
/s ADJUSTMENT POSITION/AIR FLOW dm3/s
Vallox 121 MC
Recommended
operating range
, dB
W
© VALLOX • We reserve the right to make changes without prior notice.
What the units include can vary depending on the sales area.
5
Page 6
Vallox
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MC
Electrical diagram
Supply
air fan
Fireplace switch
Extract
air fan
Safety/door switch
230V 50Hz
Protective ground to
a separate bloc
k
LINE
NEUTRAL
SLI
SNI
SLO
SNO
SFL
SFN
EFL
EFN
FSO
FSI
AHL
AHN
PHL
PHN
BL
BL1
BN
E/I
E/O
LED
Adjustment of post-heating
External controller or cooker hood
An external 0–10 Vdc voltage input can be introduced
between control signal S and GND signal for fan control.
Programming
connector
9. GND / -
8.
7.
6. GND / -
5.
4.
3. GND / -
2. 11.2 VDC / +
1.
FAULT SIGNAL
9
8
7
6
5
4
3
2
1
Extract air NTC
1
Outdoor air NTC
2
Supply air to the dwelling NTC
3
Exhaust air NTC
4
Supply air from the cell NTC
12
5
34
Adjustment of freezing level
PWM level adjustment
DIP switch
TECHNICAL DATA
2
3
4
1
+
LED
-
S
T1
130°C
Post-heating electric
radiator 900W
7022800
T2
90°C
R1
M
Belimo damper
motor 230 VAC
DIP switch Up Down
1. Post-heating Electric VKL
2. Additional heating Electric MLV
3. Unit type Bypass Input fan stopped
4. Winter function Normal Wet
LINE: Phase voltage
NEUTRAL: Zero voltage
SLI: Phase voltage to safety switch
SNI: Zero voltage to safety switch
SLO: Phase voltage to circuit board from safety switch
SNO: Zero voltage to circuit board from safety switch
SNO: Phase voltage to supply air fan
SFN: Zero voltage to supply air fan
EFL: Phase voltage to extract air fan
EFN: Zero voltage to extract air fan
FSO: Input to fireplace switch
FSI: Fireplace switch output
AHL: Phase voltage to post-heating
AHN: Zero voltage to post-heating
PHL: Phase voltage to additional heater
PHN: Zero voltage to additional heater
BL: Damper motor phase A
BL1: Damper motor phase B
BN Zero voltage to damper motor
E/I: Input voltage to fault signal relay
E/O: Fault signal relay output
6
© VALLOX • We reserve the right to make changes without prior notice.
What the units include can vary depending on the sales area.
Page 7
Vallox
MOUNTING INSTRUCTIONS
Mounting
VALLOX 121 MC is mounted on the wall with a mounting plate as
shown in the adjacent figure.
Wall mounting
Mount VALLOX 121 MC in a place where temperature does not go
below +10 °C. Without protective enclosure, the unit must be located
in a place with no acoustic disturbance, such as storerooms or technical
rooms. VALLOX 121 MC can also be located in a damp room, but not
in a bathroom next to a sauna bath.
Wall construction
The weight of the unit (60 kg) has to be taken into account when
mounting the wall bracket on the wall structure. Avoid mounting the unit
on a hollow, echoing dividing wall and on a bedroom wall because
of sound conduction, or prevent sound conduction.
Electrical connections
The unit has a plug connection. The connection box of the unit is located
loosely upon the unit and can be moved to another place as desired.
Duct connections of unit
The unit is equipped with six Ø 125-mm collars. Necessary connecting
pieces (such as inner or bent connector) can be attached to the collar.
NOTE! The connecting head of the connecting piece must not be
inserted into the collar by more than 30 mm. Fix the ducts steadily and
tightly to the relevant outlets. (Note! Unit models L/R). Implement duct
insulation if needed as defined in the ventilation plan.
12 1
MC
Air flow measurement outlets
The fixed air flow measurement outlets of the unit are located in the
door below the latch. You can measure the total pressure of the
supply and extract air ductwork at the measurement outlets, using a
differential pressure instrument. Pressure readings and air volume tables
(see Page 5) show volume flow rates at various adjustment positions.
The red measurement hoses are intended for measuring the supply air
ductwork and the black measurement hoses for measuring the extract
air ductwork.
Condensing water connections
The delivery includes a Silent Kick water seal. By connecting a pipe
to the water seal the water condensing from extract air can be led to
a oor drain (not directly to the drain). Silent Klick water seal prevents
the sound caused by water as the water seal dries up. The pipe must
not rise after the water seal. The condensation water discharge outlet
is located at the rear edge in the middle of the unit. Because of this the
unit has to be mounted horizontally level.
Bottom edge of
wall bracket
Room required by
VALLOX Silent Klick
water seal.
Wall mounting plate
84
20
21
12
30
During mounting, the unit rises 10 mm
higher than the final height.
Bottom edge
of wall bracket
30
84
20
3030
30
°
25
35
20 60
30
14 pcs
ø7
162
11
© VALLOX • We reserve the right to make changes without prior notice.
What the units include can vary depending on the sales area.
Wall mounting plate
550
25
35
30
60
20
11
7
Page 8
Vallox
12 1
MC
© VALLOX • We reserve the right to make changes without prior notice.
What the units include can vary depending on the sales area.
1.09.420F/14.5.2013/PDF
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