Vallox 90K MC Series, 90K MC R, 90K MC L Operating, Maintenance And Technical Instructions

V allox

Code

3524

Models

VALLOX 90K MC R
VALLOX 90K MC L

© Vallox

1.09.351 E

17.1.2019

1 Extract air fan

2 Supply air fan

3 Post-heating radiator
(electric 900 W)

4 Heat recovery cell

5 Outdoor air filter F7

6 Outdoor air filter G4

7 Extract air filter 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 supply air
temperature and summer/
winter function

90K

MC

Low-energy ventilation unit

with heat recovery

Operating, maintenance and technical instructions

10

67

9

11

12

3

2

4

5

8

1

The measurement outlets are
located behind the machine
plate. Detach the machine
plate by pushing it to the left
and pull the outlets out.

TECHNICAL DATA

Electrical connection 230V 50Hz = 5.7A
Degree of protection provided by enclosures IP34
Fans Extract air 0.119 kW 0.9A 92dm

direct current (DC) Supply air 0.119 kW 0.9A 75dm
Heat recovery Cross-counter flow heat recovery cell, h> 80%
Heat recovery bypass Automatic
Electric post-heating unit 900 W, 3.9 A
Fans Supply air G4 and F7

Extract air G4
Weight 52 kg
Ventilation control Cooker hood

The figure shows the R model

3

/s 50Pa

3

/s 50Pa

Vallox

90K

Fan speed adjustment

MC

Adjustment of supply
air temperature

OPERATING INSTRUCTIONS

Fan speed adjustment

The cooker hood is connected to the ventilation unit and is used to control air circulation in
the whole dwelling. Four operating ranges are available.

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.

Cooking

Open the boost flap of the cooker hood during cooking.
At other times, the flap must be kept closed.
An open flap reduces the power of ventilation in other rooms.

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 post­heating 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,

flush mounting (option)

Supply and extract
air flow adjustment
potentiometer

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.

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 fireplace is heated. NOTE! The starting of the extract air fan may
weaken draught in the fireplace! In winter, this situation may disturb the winter function of the
unit. The situation will normalise in a while, after the fireplace 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 flow. The unit has been optimised to
operate on the factory settings in normal operation in dwellings and detached houses. The
winter function parameters can be adjusted in extreme conditions, such as in a swimming
bath, but even then it is advisable to contact Vallox Maintenance.

Adjustment of the relationship between supply and extract air

This feature may be useful when adjusting air flows 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 flow can be reduced at the potentiometer. When the
potentiometer is approximately halfway, supply and extract air flow have not been reduced.
Turning the potentiometer anticlockwise reduces the air flow on the supply side, and turning it
clockwise reduces the air flow 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.

2

© VALLOX • We reserve the right to make changes without prior notice.

What the units include can vary depending on the sales area.

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

Problem Repair

blinks

Supply air sensor after the HR cell is faulty Check the sensor and conductors, replace if needed

1

Extract air sensor is faulty Check the sensor and conductors, replace if needed

2

Supply air sensor is faulty Check the sensor and conductors, replace if needed

3

Exhaust air sensor is faulty Check the sensor and conductors, replace if needed

4

Outdoor air sensor is faulty Check the sensor and conductors, replace if needed

5

Supply air fan has stopped Check the wiring of the fan, replace the fan if needed

6

Extract air fan has stopped Check the wiring of the fan, replace the fan if needed

7

EEPROM faulty Replace the circuit board of the unit with a new one

8

MAINTENANCE

AT

90K

MC

Before starting maintenance operations

When you open the VALLOX 90K MC unit, the safety switch of
the door (T) turns power off from the unit. In spite of that, always
disconnect the plug of the VALLOX 90K MC unit before starting
maintenance operations.

Fans

When the maintenance reminder gives an alarm, the cleanliness of
the fans must be checked. Outdoor air is filtered 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.

Heat recovery cell

When you replace the filters, you are also advised to check the
cleanliness of the heat recovery (HR) cell (D) at approximately every
two years. The sealing ledge (E) above the HR cell must be pulled
off before the cell can be detached. When the sealing ledge has
been removed, the HR cell can be pulled out of the unit. Note! The
laminas of the HR cell are very thin and get easily damaged. The
correct way of removing the HR cell is to put your hands behind the
HR cell and slowly pull it off. If the HR cell is dirty, wash it by putting
it in a solution of water with washing-up liquid. Rinse the HR cell
clean with a jet of water. When water has drained from between the
laminas, you can push the HR cell back in place. Finally, push the
sealing ledge in place.

C

D

B

VALLOX 90K MC filters and heat recovery cell

The units are available as right- and left-handed models. In a right-handed
(model R) model, outdoor air comes to the unit from the right side of the
centre line, as shown in the instructions. In a left-handed (model L) unit, out­door comes from the left side of the unit. The filters, summer/winter damper
and heating radiator also change places correspondingly.

E

© VALLOX • We reserve the right to make changes without prior notice.
What the units include can vary depending on the sales area.

Detaching heat recovery cell

3

Vallox

90K

MC

Fans

Check the cleanliness of the fans when carrying out maintenance for
the 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.

Detaching supply air filter (A)

Before detaching the supply air fan, you must remove the F7 fine filter
(C). To remove the F7 fine filter, pull it out. The fan is attached to the
fixing plate with a butterfly nut. Detach the butterfly nuts and lift the
fan off. Finally, disconnect the quick coupling of the fan conductor.

Detaching extract
air filter (B)

The fan is attached to the
fixing plate with a butterfly
nut. Detach the butterfly nuts
and lift the fan out. Finally,
disconnect the quick coupling
of the fan conductor. If you
use water for cleaning the unit
or parts of it, do not let it enter
the electrical parts.

MAINTENANCE INSTRUCTIONS

Cooker hood

Cooker hood grease filter

The grease filter of the cooker hood has to be cleaned 1 to 2 times
a month, depending on how much the hood is used. The grease
filter can be washed with hot water and washing-up liquid or in a
dishwasher. Remove the grease filter by pressing the quick couplings
(1) on the bottom plate of the hood open, letting the bottom plate go
in the down position and removing the filter from its clips (2).

1 2

Lamp

To change the lamp, remove the cover glass (3) of the lamp by
pushing it to the left and put a new lamp and cover glass in place
(4). Lamp type is PL 11 (11 W).

Condensing water

During the heating season, humidity of extract air condenses into
condensing water. Water formation may 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,
e.g. 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.

3 4

L

Condensing water outlet (L) and condensing wire outlet port are above
the grease filter of the hood and to the left of the flap in both right- and
left-handed models.

4

© VALLOX • We reserve the right to make changes without prior notice.

What the units include can vary depending on the sales area.

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.

Supply air

Extract air

S

E

Supply/extract air flows

90K

Input powers of fans

Fan control

voltage

(V)

3.3 9

4.4 15

5.0 22

5.7 31

6.6 47

7.7 72

8.8 114

11.2 182

Combined input

power of fans

MC

W

Model R

Model L

Duct outlets

Inner diameter of female outlet collar
125 mm

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

Pressure loss in ducts. Total pressure Pa

T = Supply air, fan speed 2…10V
P = Extract air, fan speed 2…10V

Sound values

Sound power level from the ventilation unit

to supply air ducts by octave band LW, dB

ADJUSTMENT POSITION

AIR FLOW dm3/s

Medium
frequency
of the octave
band, Hz

1000
2000
4000

8000

L

, dB(A)

WA

, dB (A) 23.9 30.6 38.0 45.3

L

pA

2 4 6 8 2 4 6 8

16.5 l/s 27.2 l/s 40.9 l/s 65.6 l/s 23.8 l/s 35.8 l/s 51.9 l/s 76.7 l/s

61.7 67.2 73.1 82.1 56.9 63.9 69.6 75.6

63

46.9 56.2 64.3 73.4 46.4 53.9 60.8 69.1

125

39.6 47.0 54.4 63.5 39.5 44.6 52.2 61.0

250

35.1 41.6 18.6 57.3 32.7 38.8 45.6 53.3

500

31.1 38.7 45.7 52.4 27.9 35.5 43.2 48.9

13.0 25.7 34.4 52.0 17.6 24.5 33.6 42.9

L

,dB

61.8 67.6 73.7 77 57.4 64.3 70.2 76.7

W

38.5 46.1 53.3 59 36.4 43.5 50.5 58.2

A-weighted sound pressure level dB (A) coming from the

unit through the envelope in the rooms where the unit

has been installed (10 m

ADJUSTMENT POSITION/AIR FLOWS (supply/extract)

2 4 6 8

17/24 l/s 29/39 l/s 44/56 l/s 69/81 l/s

Volume flow rate dm3/s

Input power (total) (W)

SFP =

Air flow (max.) (dm

ADJUSTMENT POSITION/AIR FLOW ADJUSTMENT POSITION/AIR FLOW

15.6 27.5 42.0 13.3 23.2 33.8

20.0 36.0

2

sound absorption)

SFP (Specific Fan Power) recommended value <2.5 (kW m3/s)

3

At a lower total pressure, SFP will be smaller at this speed.

/s)

Sound power level from the ventilation unit

to extract air ducts by octave band LW, dB

Vallox 90K MC

(Sound values measured without cooker
hood, cover plate and top cabinets
beside)

© VALLOX • We reserve the right to make changes without prior notice.
What the units include can vary depending on the sales area.

5

Vallox

90K

230V 50Hz

951016

TK

951031

3x0,75

BN

MC

TECHNICAL DATA

Electrical diagram

S

FS

YEGN

YEGN

YE/GNYE/GN

BK

T1

130°C

951052

BU

BN

BU

N

1

YEGN

BU

BK

YE

WT

N

1

E

951050

BK

RD

WT

BK

M

T2

90°C

LED

LINE

NEUTRAL

SLI

SNI

SLO

SNO

SFL

SFN

EFL

EFN

FSO

FSI

AHL

AHN

PHL

PHN

BL

BL1

BN

E/I

E/O

BU

BN

Fault signal

BU

N

1

9. GND /–

8. Supply fan PWM

7. Supply fan Tako

6. GND/–

5. Extract fan PWM

4. Extract fan Tako

3. GND/–

2. 11.2 VDC/+

1. Control signal S

Adjustment of freezing level

BK

YE/GN

DIP switch

12

BU

YE

WT

Programming connector

9
8
7
6

5
4
3
2
1

34

GY

BN

N

1

1

2

3

4

5

PWM level
adjustment

Adjustment of post-heating

951051

951049

GY

BN

BK

BK

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 ”5”

R1

YEGN

3

12

PL 11

950584

VA

2

3

1

-

S

OK

950115

950516

WT

GN

VALLOX 90 K SC HOOD

951026

4

1

2

4

10

11

LINE: Phase voltage

951027

951025

-

LED

+

S

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

BU

YEGN

1

2

3

951065

4x0,75

2

1

4

10

3

12

11

BK

DIP switch Up Down

1. Post-heating Electric VKL

2. Additional heating Electric MLV

3. Unit type Bypass Input fan stopped

4. Not in use Not to be used Selected

VALLOX 90K MC

S Supply air fan
E Extract air fan
TK Safety switch
R1 Post-heating radiator
M Damper motor
FS Fireplace switch (option)
OK Voltage switch

(in the cooker hood)

VA Light switch

(in the cooker hood)
Wiring:
BK black
BN brown
BU blue
GN green
GY grey
WT white
YE/GN yellow/green
RD red

6

© VALLOX • We reserve the right to make changes without prior notice.

What the units include can vary depending on the sales area.

Vallox

MOUNTING INSTRUCTIONS

Mounting

VALLOX 90K MC has to be mounted in a place where temperature
does not go below +10 °C.

Wall mounting

VALLOX 90K MC is mounted on the wall with a mounting plate as
shown in the adjacent figure.

Wall construction

Observe the wall construction during mounting. Avoid mounting the
unit on a hollow, echoing dividing wall and on a bedroom wall
because of sound conduction, or prevent sound conduction.

Condensing water

The delivery includes a water seal. By connecting a pipe to the
water seal the water condensing from extract air can be led to a
floor drain (not directly to the drain). The pipe must not rise after the
water seal. The unit has to be mounted horizontally level, so that
condensing water can get out of the unit.

Damper

Hood connection wire and
wire shield

Condensing water outlet
Condensing wire outlet port

Knurled-head nut, fastening of
hood

90K

MC

Cooker hood mounting

The cooker hood is mounted at the bottom of the VALLOX 90K
MC unit with knurled-head nuts (A), 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 fasten the hood with the knurled-head nuts.
Thread the connection wire (B) as shown in the figure, and use a wire
shield (C) if needed

© VALLOX • We reserve the right to make changes without prior notice.
What the units include can vary depending on the sales area.

7

Vallox

90K

MC

MOUNTING INSTRUCTIONS

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.

Bottom edge
of bracket

Bottom edge
of bracket

Condensing water
connection and water
seal

ø7, 14 pc

8

© VALLOX • We reserve the right to make changes without prior notice.

What the units include can vary depending on the sales area.

Vallox

MC CONTROLLER

Set the speed knob in position 1 and

detach the knob with for instance

screwdriver.

There are adjustment and measurement

holes between the knob.

Measure voltage at contacts – and S,

adjust for instance speed 1

at potentiometer 1.

90K

MC

Indicator

Indicator (A) shown in Figure 1 is lit when the MC ventilation unit controlled by the hood is
on. If the indicator blinks at one-second intervals, the ventilation unit reminds of the need for
maintenance. The reminder is given at half-year intervals. The maintenance reminder is reset
when the cover of the ventilation unit is opened. The instructions for the ventilation unit also
include explanations for other cases where the indicator blinks in fault situations.

The indicator is not in use if a cooker hood is used to control roof fans or other ventilation unit
or the indicator is not connected to the ventilation unit.

Adjustment of fan speeds

A low signal voltage comes to the controller, which means that the adjustment can be made
when the controller is connected and the ventilation unit is in operation.

• The adjustment is conducted in the four holes below the controller knob (Figure 2) one
speed at a time, at the potentiometer corresponding to each speed.

• The voltage adjusted can be measured at the measuring points found below the knob
(markings S and –) or on the terminal block below a black housing (markings S and –,
see Figure 6) with a multimeter direct-current voltage measurement. The adjustment range
is ~2...11.2 V.

• Control voltage (air flow) rises when the potentiometer is turned clockwise. The preset
voltages are as follows: 2.5 V, 5 V, 7.5 V and 10 V.

Note! Do not set control voltage so low that the fan does not start (circa 1.5 V).

Sample adjustment of air flows:

Basic ventilation is adjusted at speed 2.

• Set the controller at speed 2 and measure air flows at the valves.

• If the total air flow is too low, set the control voltage higher at potentiometer 2.

• If the total air flow is too high, set the control voltage lower at potentiometer 2.

Do not throttle the air flow unnecessarily with valves.

• The balance between supply and extract air flows in the Vallox MC ventilation unit can

be adjusted with the potentiometer inside the unit. Do not change this balance during
measurements carried out at other speeds.

• Adjust the absence air flows correspondingly at speed 1 (potentiometer 1).

• Adjust the boosting air flows correspondingly at speed 3 (potentiometer 3).

• You can usually leave speed 4 for full power.

Put the knob back in place, turn the knob to

the following speed position and detach the

knob again.

Measure voltage at contacts – and S, adjust

speed 2 at potentiometer 2,

and so on.

Finally, measure voltage at all speeds at the measurement pins and enter them in the
measurement record. In for instance a terraced house, you can use voltage measurement to
copy the measurement in the first dwelling to other similar dwellings.

You can also carry out the measurement at

the terminal block, in locations shown in the

electrical diagram.

© VALLOX • We reserve the right to make changes without prior notice.
What the units include can vary depending on the sales area.

9

Vallox

90K

NOTE!
There must always be a

separate extract valve
in the kitchen. Basic
extraction is not possible
through the cooker hood
when a VALLOX 90K MC
unit is used. The cooker
hood is used for boosted
smoke abatement.

An alternative way of
mounting a water seal
if the water seal coming
with the unit is not suitable
for the condensing water
connection.

MC

MOUNTING INSTRUCTIONS

NOTE! Minimum distance
of grease filter from the
cooker is 480 mm.

10

© VALLOX • We reserve the right to make changes without prior notice.

What the units include can vary depending on the sales area.

Vallox

MOUNTING INSTRUCTIONS

VALLOX 90K MC
Mounting of covering door brackets

598

Fasten the fixing
moulding (A) to the
covering door at the
point shown in the
figure, using screws

3.5*15 supplied with
the unit.

Cover the screw-heads
with felt tape.

Glue the magnet (C)
to the covering door
at the point shown in
the figure.

40

Fixing

=

moulding (A)

Screws

3.5*15

Cover the screw-heads with felt tape

Glue the magnet tape (C)

40

Lower edge
of covering door

Covering
door

Mounting

90K

B

MC

B

A

of covering door

=

Insert the groove of
the fixing moulding (A)
at the upper of the
covering door to the
projections (B) at the
upper edge of the
ventilation unit’s door.

620

610

Press the magnets (C)
at the lower edge of
the covering door on

40

40

the door of the
ventilation unit.

A

C

© VALLOX • We reserve the right to make changes without prior notice.
What the units include can vary depending on the sales area.

11

Vallox

90K

MC

MOUNTING INSTRUCTIONS

12

1.09.351E/17.1.2019/PDF

© VALLOX • We reserve the right to make changes without prior notice.

What the units include can vary depending on the sales area.