Flexit UNI 2 User Manual

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111537EN-11 2019-10

UNI 2

User Manual

Air Handling Unit & Automatic Control

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Contents

1 Functional description of balanced ventilation

1.1 Fans (M1, M2)

1.2 Filters (FI1, FI2)

1.3 Rotor (HR-R)

1.4 Heating element (EB1) (for UNI 2 E)

1.5 Temperature sensors (B1, B4)

2 Operating the door

2.1 Wall-mounted unit

2.2 Floor-mounted unit

2.3 Ceiling-mounted unit 3 Overview of CI60 control panel 4 CI60 in use

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4.1 General

4.2 Increasing/reducing air supply

4.3 Adjusting the air supply

4.4 Temperature adjustment

4.5 Filter replacement

4.6 Alarm

4.7 Reset

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5 Overview of CI600 control panel 6 CI600 in use

6.1 General

6.2 Idle mode

6.3 Menu navigation

6.4 Startup

6.5 Operating status 7 CI600 main menu

7.1 Fan speeds

7.2 Max timer

7.3 Settings

7.4 Temperature

7.5 Timer

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7.6 Daily/weekly timer

7.7 Time and date

7.8 Language

7.9 Filters

7.10 Alarm

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7.11 Operating information 8 CI600 advanced user menu

8.1 PIN

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8.2 Advanced user

8.3 Temperature regulation

8.4 Fan control

8.5 Conﬁguration

8.6 Operating time

8.7 Service

8.8 Menu tree 9 Cleaning and maintenance

9.1 Changing the ﬁlters

9.2 Cleaning the fans

9.3 Changing the brush strips

9.4 Tightening of rotor belt

9.5 Cleaning the rotor

9.6 External cleaning 10 Maintenance table 11 Troubleshooting 12 CE Declaration of Conformity

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Important Safety Instructions:

It is the installer's responsibility to carry out a full safety and function assessment of the appliance.

To reduce the risk of fire, electric shock or injury, read all the safety instructions and warning texts before using the unit.

• This unit is only designed for ventilation air in homes and commercial buildings.

• It must not be used to extract combustible or flammable gases.

• Remove the power plug before commencing any service and maintenance work.

• Before opening the door: switch off the heat, let the fans continue for 3 minutes to remove hot air, unplug the unit and wait 2

minutes before opening the doors.

• If the power lead is damaged, it must be replaced by the manufacturer, the manufacturer's service agent or a similarly

qualified person.

• The unit contains heating elements that must not be touched when they are hot.

• The unit must not be operated without the filters being in place.

• Do not cook any combustible substances under the kitchen hood if one is installed.

• Do not leave a saucepan or frying pan containing oil or grease unsupervised when using a kitchen hood.

• The instructions in the user manual must be followed for complaints to be accepted.

To maintain a good indoor climate, comply with regulations and avoid condensation damage, the unit must never be stopped apart from during service/maintenance or in connection with an accident.

Symbols used

These products have a number of symbols that are used to label the product itself and in the installation and user documentation.

Supply air

Exhaust air

Extract air Kitchen air

Outdoor air

EXAMPLE OF NIPPLE LOCATION (shown as a right-hand model)

DANGER! ELECTRICITY

DANGER! DO NOT TOUCH

CAUTION! When a text bears this symbol, it means that personal injury or serious damage to the equipment may result if the instructions are not followed.

NB! When a text bears this symbol, damage to equipment or poor efﬁciency may be the consequence of not following the instructions.

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.

use by children.

Children shall not play with the appliance. Cleaning and user maintenanc shall not be made by children without supervision.

Our products are subject to continuous development and we therefore reserve the right to make changes.

We also disclaim liability for any printing errors that may occur.

Note that the product is not intended for

Our products are subject to continuous development and we therefore reserve the right to make changes.

We also disclaim liability for any printing errors that may occur.

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1 Functional description of balanced

ventilation

1.1 Fans (M1, M2)

The fans ensure that air enters and leaves the building. They can be individually adjusted for optimal operation. The unit can be regulated at three different speeds via the control panel: Min, Normal and Max. See chapter 5.1 for more information.

Adjustment must always be carried out by qualiﬁed staff before the installation is used for the ﬁrst time.

1.2 Filters (FI1, FI2)

Filters with a high filter grade (ePM1 55% F7) are used as standard for both supply air and extract air so that the air which enters the building is clean. The filters also ensure that the unit stays clean and can maintain thermal efficiency and air flow.

Fig. 1

F10

F20

EB1

FI2

FI1

HR-R

1.3 Rotor (

HR-R)

The air passes through the rotary wheel-type heat exchanger (recovery). The rotor functions as a heat magazine. The heat from the extract air heats up one part of the rotor. When the heated part comes over to the supply air side, the heat is transferred to the supply air.

1.4 Heating element (EB1) (for UNI 2 E)

If the energy recovered from the extract air is insufficient to maintain the set supply air temperature, an electric heating element will help raise the temperature. The heating element is protected against overheating by the thermostat (F20) which cuts out at high temperature. For extra safety, the thermostat (F10) cuts out at critical temperatures. If the thermostat (F10) is tripped, it has to be reset manually by pressing the reset button (see Fig. 2). If the alarm is tripped repeatedly, contact the service company or distributor. See chapters 4.7 and 7.10 for more information.

1.5 Temperature sensors (B1, B4)

The unit has two temperature sensors as standard. The supply air sensor (B1) registers the temperature after the heating battery. The outdoor air sensor (B4) registers the temperature of the outdoor air.

Fig. 2

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2 Operating the door

2.1 Wall-mounted unit

1. First undo the screw in the top of the door (see Fig. 3).

2. Pull the handles out and rotate to the side (see Fig. 4).

3. The door can now be opened to hang open at 180º (see Fig. 5) or unhooked (see point 2.4).

Fig. 3

Fig. 4

If the door needs to be removed

The door can be removed when it is open between 40º and 105º. If there is limited space in front of the unit, the lock screw on the underside of the unit can be unscrewed temporarily (see Fig. 6). Then the door can be pushed out sideways (see Fig. 7).

The door is heavy, so take care when removing it.

Fig. 6

Fig. 5

Fig. 7

MAX 180°

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2.2 Floor-mounted unit

1. Make sure that hinge stops and a door strap are fitted (see Fig. 8, 9 and 10).

2. Undo the screw in the top (see Fig. 11).

3. Pull the handles out and rotate to the side (see Fig. 4).

4. The door can now be opened to a maximum of 105º (se Fig. 8).

Fig. 8

Fig. 9

Fig. 11

Fig. 12

Fig. 10

Fig. 13

AX 105°

MAX. 105°

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2.3 Ceiling-mounted unit

Check ﬁrst that hinge stops are ﬁtted (see Fig. 14 and 15). If not, the door could fall off when opened! Be careful!

Note that a door strap also needs to be ﬁtted if the unit is mounted on the ceiling. This protects the hinge stops against damage and prevents

the door from opening more than 105° (see Fig. 16).

1. First undo the screw in the top of the door (see Fig. 17).

2. Pull the handles out and rotate to the side (see Fig. 18).

3. The door can now be opened to a maximum of 105º (see Fig. 19).

Fig. 14

Fig. 17

Fig. 18

Fig. 15

Fig. 16

Fig. 19

MAX. 105°

105°

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3 Overview of CI60 control panel

Fig. 20

No. Description

Switch for increased ventilation

2 Switch for decreased ventilation

Indication of MAX speed

Indication of NORMAL speed

Indication of MIN speed

Indication of ALARM

Indication of FILTER CHANGE

No. Description

8 Potentiometer for adjusting extract air

at NORMAL speed

9 Potentiometer for adjusting supply air at

NORMAL speed

Switch for additional heating ON/OFF

11 Potentiometer for adjusting supply air

temperature

12 Switch to reset alarm

Nos. 8, 9 and 10 are used to adjust the unit before it is used for the first time.

*The numbers are used as references in subsequent descriptions

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4 CI60 in use

4.1 General

The control unit consists of a touch panel with pushbuttons, LEDs for indication and adjustment potentiometers and switches for adjusting the ventilation unit. The control unit communicates with the ventilation unit via a low-voltage cable.

4.2 Increasing/reducing air supply

Use switches 1 and 2 to increase and reduce the fan speed and thus the air flow. Different speeds depending on the operating situation.

MIN

NORMAL

MAX

Do not use during first year of operation, or when the building is in use.

Used under normal conditions. In this setting, the air supply must be adjusted according to current regulations.

Used if there is a need for increased air supply on account of increased occupancy or a higher humidity level, for example during showering or when clothes are being dried. This setting is usually used for limited periods of time.

4.4 Temperature adjustment

The temperature required in the supply air can be set with potentiometer 11. The adjustment range is 10 - 30 °C. Using the factory settings is recommended.

If necessary, the ventilation unit’s heating can also be switched ON/OFF with switch 10. In this case only the rotating heat exchanger is used as a source of heat. It is best to leave it in ON position, as the unit will then respond automatically when there is a need for additional heating.

ITEM 10

OFF

4.5 Filter replacement

Every six months, LED 7 lights up to remind you that it is time to replace the air filters in the unit. See section 2 for more information on filter r

After the activity has been carried out, the indicator must be reset. See more under the Reset section.

eplacement.

The different speeds are indicated with LEDs 3, 4 and 5.

4.3 Adjusting the air supply

At NORMAL speed level, the air flow must be adjusted according to project data. Potentiometer 9 is used for the supply air level and potentiometer 8 for the extract air level. The adjustment range is 20-100% of the maximum level according to the scale of the potentiometer.

Factory settings:

MIN

NORMAL

MAX

Fig. 21

50% (fixed)

75% (variable)

100% (fixed)

10 11

4.6 Alarm

If anything unforeseen occurs with the ventilation unit, indicator 6 lights up. The signal given by the indicator depends on the reason for the indication.

A permanent light indicates:

• Fault return water detector (B5)

• Heat recovery fault (B)

A permanent light with indicator 5 (MIN speed) flashing indicates:

• Fault supply air detector (B1)

• Fault extract air detector (B3)

• Fault outdoor air detector (B4)

A flashing light indicates:

• Overheating thermostat fault (applies only to electric hea-

ting)

• Fault in external fire/smoke detector (accessory)

• Heat recovery fault (A)

• Additional heating fault (applies only if the unit has a water

battery)

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4.7 Reset

After the filter has been replaced or the cause of the alarm repaired, the alarm must be reset. This is done by pressing switch 12.

If the indicator goes out, the action has been carried out correctly. If the indicator remains on, the fault has not been repaired correctly.

5 Overview of CI600 control panel

Fig. 22

NB! If thermostat F10 trips, the unit will have to be

opened up and physically reset before resetting on the panel. If the alarm trips repeatedly, contact the service company or distributor.

See chapter 1.4 for more

information.

No. Description

UP/INCREASE switch

BACK/CANCEL/NO switch

DOWN/DECREASE switch

OK/YES switch

HELP switch

6 Display

Indication of OPERATION/OK

-Green light

Indication of FILTER CHANGE

-Yellow light

Indication of ALARM

-Red light

4 5

*The numbers are used as references in subsequent descriptions

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040709

6 CI600 in use

6.1 General

The control unit consists of a colour display, pressure switches and indicators (LEDs). See figure on left for more information. The unit communicates with the ventilation unit via a low-voltage cable.

If you select a function that has numerical values, the current value is displayed with a light blue cursor. The value is changed with buttons 1 and 3 and then confirmed by pressing button 4.

6.2 Idle mode

The panel will go into idle mode if it is not used for a while. Operating information is displayed in idle mode. The panel will come out of idle mode if one of the buttons is pressed.

13.08.2009

16:43

B C

18°C 22°C

- NORMAL

D E F

A. Time and date B. Outdoor air temperature C. Room temperature D. Current speed E. Additional heating activated/deactivated F. Daily/weekly timer active

6.3 Menu navigation

Buttons 1 and 3 are used to navigate through the menu lines. The cursor is illustrated by the line being light blue. If it is possible to make a selection on the current menu line, this is displayed with OK? to the right of the line. A selection is confirmed by pressing button 4. If a menu line contains submenus, this is illustrated with a '>' sign at the end of the line.

SETTINGS

TEMPERATURE TIMER DAY/WEEK SETTINGS TIME AND DATE LANGUAGE FILTER ALARM ADVANCED USER OPERATING INFORMATION

> > OK? > > > > > >

TIME AND DATE

TIME DAY MONTH YEAR

13 : 45 04.07.09

If several values can be changed, the cursor jumps to the right when a selection is confirmed with button 4. The procedure is repeated until all settings have been changed to the desired values.

If you want to cancel a function or return to the previous menu screen, use button 2.

Button 5 activates a help text that briefly describes the current menu screen.

OK?

6.4 Startup

When the system is started, a special startup menu is opened.

START MENU

LANGUAGE

TIME AND DATE MAIN MENU

OK?

The basic language and date settings are set in this menu. When this activity has been carried out, you choose to go to the main menu.

6.5 Operating status

In normal operation without problems, the green LED 7 lights up to confirm that everything is working normally. How any problems affect the system is described in subsequent sections.

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7 CI600 main menu

7.1 Fan speeds

The main menu contains various choices. Most concern fan speeds. The speed selected is indicated with large fan symbols and bold text.

MAIN MENU

MIN

NORMAL

OK?

MAX MAX TIMER

SETTINGS

To change the speed, move the cursor with buttons 1 and 3.

MAIN MENU

MIN

NORMAL

MAX

OK?

MAX TIMER

7.2 Max timer

This menu item activates a function that increases the speed to MAX for a limited period before returning to the speed selected previously. The period of time can be adjusted under the SETTINGS menu item. This function is ideal during showering, for example, when there is a greater need for extraction for a limited period.

MAIN MENU

MIN NORMAL MAX

MAX TIMER

OK?

SETTINGS

When the function is active, the time is counted down on the display. If you select TIMER OFF, the function will be cancelled and the speed will return to the previous selection.

7.3 Settings

Under the SETTINGS menu item, you can adapt the system as you want.

SETTINGS

Then confirm your selection with button 4 and the speed selected will be highlighted with large fan symbols and bold font.

MAIN MENU

MIN NORMAL

MAX

OK?

MAX TIMER

SETTINGS

MIN Must not be used when the home is in use. Must

not be used in the first two heating seasons.

NORMAL Used under normal conditions. On this setting

the air supply must be adjusted according to current regulations.

MAX Used if there is a need for increased air supply

on account of higher occupancy or a raised humidity level, for example during showering or when clothes are being dried. This setting is normally used for limited periods.

SETTINGS

TEMPERATURE TIMER DAY/WEEK SETTINGS TIME AND DATE LANGUAGE FILTER ALARM ADVANCED USER

> > OK? > > > > >

7.4 Temperature

This is where the desired temperature of the supply air is set.

TEMPERATURE

°C

HEATING ELEMENT ON/OFF

OK?

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A good rule is to adjust the temperature to max. 18° so that the air is mixed optimally with the air already in the building.

7.6 Daily/weekly timer

Programming the timer begins with selecting the day.

In the HEATING ELEMENT OFF/ON menu item, the additional heating in the ventilation unit can be switched off. In such case, only the rotating heat exchanger is used as a source of heat.

If necessary, the ventilation unit's heating can also be turned off. In this case only the rotating heat exchanger is used as a source of heat. It is best to leave it ON, as the unit will then respond automatically when there is a need for additional heating.

NB! This does not apply if the unit has a water battery.

If the heating element is switched off, this symbol is

displayed when the display enters idle mode.

HEATING ELEMENT ON/OFF

HEATING ELEMENT ON

7.5 Timer

Here you set the time you want for the MAX TIMER function. This is used when the function is activated from the main menu.

TIMER

OK?

DAY / WEEK SETTINGS

MONDAY

TUESDAY

WEDNESDAY THURSDAY FRIDAY SATURDAY SUNDAY

A new menu screen appears under each day.

TUESDAY

1 08

2 16

3 18

4 19

Each day can be programmed with four different time intervals. Adjust the start and stop times for each interval and then adjust the desired speed and temperature. To activate the interval, select a green tick. The interval will then be active for the selected time and day of the week. A red cross means that the interval is not activated. If necessary, then select another interval and repeat the procedure.

The following rules apply to the programming:

• An interval can never be started before the previous one has ended.

• The stop time can never be before the start

time.

MIN

NORMAL

MAX

NORMAL

OK?

16°

18°

16°

18°

min

To adjust the time interval for MAX TIMER, see chapter 8.4 under "Timer".

OK?

Once you have finished programming a day, repeat the procedure for the other days.

When the timer is active, this symbol is displayed when the display enters idle mode.

If there is no new time interval registered after the finished period, the speed and temperature return to the setting that was previously active.

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7.7 Time and date

040709

The time and date can be adjusted in this dialog.

The normal time is 6 - 12 months, depending on the environment.

TIME AND DATE

TIME DAY MONTH YEAR

13 : 45 04.07.09

OK?

7.8 Language

The language selected can be changed in this dialog.

LANGUAGE

NORSK ENGLISH SVENSKA DEUTCH NEDERLANDS SUOMI DANSK

OK?

When the filter alarm is tripped, the yellow indicator 8 lights up and an information text appears. Follow the instructions in the text. It is possible to go directly to this dialog from the message or via the menu tree. After the alarm has been reset, the countdown to the next filter change begins.

7.10 Alarm

If a problem occurs in the operation of the ventilation unit, an alarm will be tripped. The red indicator 9 lights up and an information text appears in the display. Follow the instructions in the text. It is possible to go directly to this dialog from the message or via the menu tree.

NB! If thermostat F10 trips, the unit will have to be opened up and physically reset

before resetting on the panel. If the

alarm is tripped repeatedly, contact the service company or distributor. See chapter 1.4 for more information.

ALARM

RESET ALARM

OK?

7.9 Filters

A reminder appears regularly on the display. In this dialog, the time interval can be adjusted and the filter alarm reset.

FILTER

INTERVAL CHANGE OF FILTER RESET FILTER ALARM

> OK?

INTERVAL CHANGE OF FILTER

6 MND

OK?

7.11 Operating information

This general screen displays current temperature values, whether the daily/weekly timer is active and activity as 0-100% for cooling, heat exchanger and additional heating.

OPERATING INFORMATION

SET TEMPERATURE DAY / WEEK SETTINGS SUPPLY AIR EXTRACT AIR OUTDOOR AIR RETURN WATER HEAT RECOVERY SYSTEM COOLING HEATING

22° AKTIV 22° 21° 0° 35° 100% 0% 100%

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8 CI600 advanced user menu

NB! For more information on the ”Advanced

User” menu, refer to the ”CI600 Reference Manual” on Flexit’s homepage.

Regulation type

If supply air regulation is selected, no further settings can be set here. If extract air regulation is selected, the max. and min. supply air temperatures can also be specified.

8.1 PIN

To access the menu item, you need to enter the PIN 1 0 0 0.

PIN CODE

1 0 0 0

OK?

8.2 Advanced user

This menu contains functions for monitoring, configuration and troubleshooting. Information to do with adjustment can be found in the installation instructions. Complete documentation of all menus, including configuration for accessories and extras, etc., is described in the CI600 reference manual, which is available at www.flexit.no.

ADVANCED USER

TEMPERATURE REGULATION

FAN REGULATION

CONFIGURATION OPERATING TIME FACTORY SETTINGS SERVICE

OK?

> > > >

REGULATION TYPE

REGULATION MAX SUPPLY AIR TEMP MIN SUPPLY AIR TEMP

EXTR OK? 35° 15°

Cooling

NB! Flexit does not supply or project cooling

machines.

In this dialog, the cooling function is activated and the parameters MIN OUTDOOR AIR TEMP for supply of cooling and MIN SPEED for supply of cooling are specified. If a DX cooling machine is used, the supply delay interval can be specified.

COOLING

OK?

COOLING MIN OUTDOOR TEMP MIN SPEED RESTART DELAY COOLNESS RECOVERY

AV 18° MIN 180 s

8.3 Temperature regulation

In this menu screen, you configure the temperature regulation and cooling functions.

TEMPERATURE REGULATION

REGULATION TYPE COOLING NEUTRAL ZONE EXT. TEMP. CONTROL

> > OK? >

It is also possible to activate a function to recover cooling in the building using the rotating heat exchanger. Enter the desired difference between the outdoor and indoor air temperatures for when the function is activated.

COOLNESS RECOVERY

COOLNESS RECOVERY DIFF

OFF 1°

OK?

Page 16

Neutral zones

To achieve more even temperature regulation, the neutral zones can be set in this menu.

NEUTRAL ZONE

Adjustment (supply air and extract air)

This dialog is identical for the supply air and extract air fans. The fans are adjusted individually to the desired capacity for the respective speed.

COOLNESS RECOVERY HEAT RECOVERY SYSTEM

2°

OK?

1°

External temperature control

Control of the temperature settings from an overall system must be entered in this menu. In this case, the temperature settings in the control unit are overridden.

EXT. TEMP. CONTROL

OFF

OK?

SUPPLY AIR

MIN SPEED NORMAL SPEED MAX SPEED

Factory settings:

MIN

NORMAL

MAX

50%

75%

100%

Timer

Settings are entered in this menu for the speed and time that are to apply to the ‘MAX TIMER’ function in the main menu.

OK?50% 75% 100%

TIMER

8.4 Fan control

The fans are selected and configured in this menu screen.

FAN REGULATION

SUPPLY AIR EXTRACT AIR TIMER AIR VOLUME COMP

> > OK? >

STANDARD SPEED STANDARD TIME

OK?MAX

30 m

Air ﬂow rate compensation

This function can be activated via an input on the control card. The speeds required for each fan are selected here. The function can be used with a kitchen fan or other device that requires additional supply air.

AIR VOLUME COMPENSATION

SUPPLY AIR EXTRACT AIR

OK?MAX

MIN

Page 17

8.5 Conﬁguration

The general configuration is set in this menu screen.

CONFIGURATION

Fire/Smoke

This function requires an external sensor to be connected to the control card.

SENSORS FIRE/SMOKE COMMUNICATION START/STOP SEQUENCE REST MODE

> > OK? > >

Sensors

The temperature sensors can be calibrated in this menu to be better coordinated with the real situation, and a pressure sensor is activated as a pressure guard instead of the integrated time control.

SENSORS

SUPPLY AIR EXTRACT AIR OUTDOOR AIR RETURN WATER FILTER GUARD

> > OK? > >

FIRE/SMOKE

MODE

Mode Supply air fan Extract air fan

1 STOP STOP

2MAX MAX

3 STOP MAX

4 MAX STOP

OK?1

Communication

Proceed to the “HOME/AWAY”submenu. This function can be used to make the unit run on other operating settings using an external switch.

The menu screen is identical for all temperature sensors and they can be adjusted within an interval of 5 °C.

SUPPLY AIR

CALIBRATION

If the pressure guard is activated, an external sensor must be connected to the control card. The sensor replaces the integrated filter time control.

OK?0

FILTER GUARD

ACTIVATION

OK?OFF

NB! The settings have no effect unless an external switch is connected.

The settings are entered for the AWAY selection. Speed and temperature can be selected, plus how long after activation the new setting should take effect.

COMMUNICATION

HOME/AWAY

OK?

Page 18

Standby mode

In this menu you can adjust the time it takes before the display enters idle mode.

REST MODE

TIME DELAY

2 min OK?

De-icing

Activates/deactivates the function.

Start temperature

The start temperature for the defrosting function is set here. The temperature in question is the outdoor temperature.

Period time

Period time for de-icing operation.

Frequency

Decides how many times the period shall be repeated per hour.

8.6 Operating time

This menu screen displays the ventilation unit’s total operating time and how much time has passed since the last filter replacement.

OPERATIONS COUNTER

OPERATING TIME FILTER STOP MIN NORMAL MAX ROTOR HEATING ELEMENT

459.7 TIM

0.0 TIM

123.0 TIM

161.4 TIM

178.0 TIM

0.4 TIM

0.3 TIM

8.7 Service

Passwords are only revealed in consultation with Flexit's service department.

De-icing

The integrated de-icing function is not activated at the time of delivery of the ventilation unit. The function can be configured and activated in this

menu screen.

Search path for menu selection:

MAIN MENU/SETTINGS/ADVANCED USER/SERVICE/DEFROSTING

DE-ICING

DE-ICING START TEMPERATURE PERIOD TIME FREQUENCY ROTOR SPEED START FAN REDUCTION PERIOD TIME FREQUENCY FAN SPEED

OK?OFF

-9° 60 min 1/TIM 15

-14° 60 min 1/TIM 50%

Rotor speed

When the start temperature has been reached, the speed of the drive motor of the rotating heat exchanger is reduced to the speciﬁed RPM.

Start fan reduction

As an additional safety function, the speed of the supply air fan can be reduced. This takes effect at the set outdoor temperature.

Period time

Period time for de-icing operation.

Frequency

Decides how many times the period shall be repeated per hour.

Fan speed

As an additional safety function, the speed of the supply air fan can be reduced. This takes effect at the set outdoor temperature.

De-icing - Parameters

Parameter Default Range Unit

De-icing OFF OFF/ON

Start temperature

Period time 60 1–60 min

Frequency 1 1–10 no./hour

Rotor speed 15 15–180 rpm

Fan reduction -14 (-5)–(-45) °C

Period time 60 1–60 min

Frequency 1 1–10 no./hour

Fan speed 50 20–100 %

-9 (-5)–(-45) °C

Page 19

8.8 Menu tree

Fig. 23

MAIN MENU

TEMPERATURE

TIMER

DAY/WEEK SETTINGS

TIME AND DATE

LANGUAGE

FILTER

ALARM

ADVANCED USER

TEMPERATURE REGULATION

FAN CONTROL

CONFIGURATION

OPERATING TIME

FACTORY SETTINGS

SERVICE

HEATING ELEMENT ON/OFF

MONDAY

SUNDAY

RESET FILTER ALARM

FILTER CHANGE INTERVAL

REGULATION TYPE

COOLING COOLING RECOVERY

NEUTRAL ZONE

EXT. TEMPERATURE CONT.

SUPPLY AIR

EXTRACT AIR

TIMER

AIR FLOW RATE COMP.

SENSORS

FIRE/SMOKE

COMMUNICATION HOME/AWAY

START/STOP SEQUENCE

IDLE MODE

SUPPLY AIR

EXTRACT AIR

OUTDOOR AIR

RETURN WATER

FILTER GUARD

SYSTEM INFORMATION

PRODUCTION DATA

TEST

ALARM

SPECIAL FUNCTIONS

DE-ICING

PARAMETERS

Page 20

9 Cleaning and maintenance

Before opening the door: Switch off the heat, let the fans continue for 3 minutes to remove hot air, unplug the unit and wait 2 minutes before

opening the doors.

9.1 Changing the ﬁlters

The ﬁlters have a limited life, and to preserve a healthy indoor air quality it is important to change them when they are dirty.

How often the filters need to be changed depends on the degree of contamination of the air where they are installed. In general, the filters need to be changed at least once a year, preferably in the autumn (after the pollen season). In areas with a lot of dust and contamination, the filters should be changed in the spring and autumn.

Fig. 24

Drawer

Filter

Dirty filters can, among other things, lead to:

• Reduced performance of the unit

• The unit becoming dirty

• Humidity damage in the home

• Reduced indoor air quality

A filter subscription is recommended to ensure full benefit from the system.

111738.

To take out the filters:

1. Pull the filter drawer out as far as it will go (see Fig. 24).

2. The filter is now loose and can be removed.

3. Put a new filter in and push the drawer properly into place.

When changing the ﬁlter, check that the whole unit is working normally.

Both filters should always be changed.

The drawer does not have to be removed completely.

Make sure that the ﬁlter is not damaged during ﬁtting. Use the ﬁlter's outer edge to push it in. A damaged ﬁlter reduces the unit's effect and the

air's purity.

The order no. for a new set of ﬁlters is

Fig. 25

Seal

Check that the seal is intact before inserting the ﬁlter. Then push the ﬁlter drawer properly into place to prevent air leakage.

Rotor

Use the following checklist:

• Check that the rotor is rotating. Turn

the rotor in the direction of rotation as shown on the rotor cassette (see Fig. 25).

• If necessary, clean the rotor

(see chapter 9.4).

• Check that the fans are clean

(see chapter 9.2).

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9.2 Cleaning the fans

The fans must be cleaned at least once a year. Clean the fan blades with a grease solvent on a cloth (e.g. methylated spirits) and compressed air if possible. NB! Do not use water.

To take out the top fan:

1. Pull out the electric quick-release contact for the fan (see Fig. 26).

2. Press down the hook on the spring under the fan housing and pull the housing sideways (see Fig. 27-1 and 27-2). Then take the fan housing out of the unit. Take care not to damage the seal when you pull the fan housing out.

To take out the bottom fan:

1. Pull out the electric quick-release contact for the fan (see Fig. 26).

2. Undo the safety screw and pull the fan housing out of the unit (see Fig. 27-1 and 27-2). Take care not to damage the seal when you pull the fan housing out.

To put the fan back, follow points 1 and 2 in reverse order.

Fig. 26

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Fig. 27

Seal

Fan

Seal

Fan

Page 23

Fig. 28

Page 24

9.3 Changing the brush strips

The brush strips become worn over time. If they do not sit tightly against the rotary

exchanger, it may be necessary to change them

(product code 102686). Alternatively, they can be moved closer to the rotor, as the aluminium profile they are mounted in has two grooves.

Unplug before starting!

Proceed as follows:

1. Undo the screw for the electric cover (see Fig. 28-1) and take the cover off.

2. Disconnect the rotor's quick-release contact from the circuit board by pressing the release down and pulling the contact (see Fig. 28-2).

3. Undo the safety screw for the rotor module (see Fig. 28-3).

4. Pull the rotor module straight out.

5. Remove the screw in the centre of the aluminium profile and pull the profile out (see Fig. 29).

6. Pull the brush strips out of the groove. Move them up from level 1 to level 2 (see Fig. 30), or replace

them with new ones if they are completely worn out.

wheel-type heat

Fig. 29

Fig. 30

level 1

level 2

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9.4 Tightening of rotor belt

Proceed as follows:

1. Remove qty. 2 screws in the plate on the outer side of the rotor cassette (see Fig. 31).

2. Remove qty. 4 screws in the rotor cassette in order to loosen the rotor motor bracket (see Fig. 32).

3. Screw out the Allen screw in the drive roller (see Fig.

33) and pull out the drive roller (see Fig. 34).

Note: Do not screw the drive roller all the way in when it is screwed in again. Leave 1-2 mm of clearance mm to the rotor motor bracket.

4. Screw out the screws (qty. 4) that fasten the rotor motor to the bracket and move the screws to the uppermost holes (see Fig. 35), and the rotor belt will consequently be tightened when the parts are mounted back in place.

9.5 Cleaning the rotor

As the unit has high impermeability filters installed, it is not usually necessary to clean the rotor. If, for various reasons, it should still be necessary, dust can be removed with a soft brush. Further cleaning is possible by removing the rotor, spraying it with a grease solvent and then blowing it clean from the opposite side. Distance approximately 60 mm and max. pressure 8 bar. Ensure that the motor is not exposed to water during cleaning. Ensure that all seals around the rotor are intact and tight. Ensure that there is no damage to the rotor belt, and that the rotor rotates freely.

Fig. 31

Fig. 32

Fig. 33

9.6 External cleaning

Many kitchen surface cleaners contain chemicals that may damage the product’s plastic components. Therefore use a soft cloth moistened with warm water and a neutral detergent to clean the outside of the product.

Do not use abrasive cleaners or scouring powder, as such products can damage the

surfaces. Cleaners containing ammonia or citrus must not be used. Products that give stainless steel an anti-ﬁngerprint coating must not be used either.

Fig. 34

Fig. 35

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10 Maintenance table

Component Action Interval

Filter Filters must be changed at least once a year. It is best to change them twice a year, before and after the

pollen season. Check that the ﬁlter seal is completely tight.

Fans Fans must be cleaned at least once a year to maintain fan efﬁciency. 12 months

Rotary wheeltype heat exchanger

Kitchen hood* Wash the grease ﬁlter. Check that the damper is clean and closes fully. 2 weeks

Seals Check that the seals on the door, under the ﬁlters, on the fan modules and on the rotor module are intact. 12 months

Valves The supply air and extract air valves (for the bathroom, bedroom, laundry room, etc.) must be cleaned at

Air intake Check that no leaves and other items have caught on the grille.

Roof cowl If the unit has a roof cowl, this must be checked for leaves and the like. Also check that the drain slots are

Ducts Check that the ducts are clean. 10 years

Brush strips Check that the brush strips are intact and sit tightly against the rotor. If they are worn, they can be moved

Inside unit A combination of a very low outside temperature and damp extract air can lead to the formation of

Capacitor In the electrical compartment there are two cylindrical electrical components called capacitors. The

Check that the surfaces are clean. Check that the sealing strips face in towards the rotary wheel-type heat exchanger. Check that the rotor belt is intact and not too slack.

least once a year.

In periods of sea smoke during winter the air intake can freeze up. If necessary it must be scraped clean so that the air can pass through.

open.

to the next groove in the proﬁle so that they are closer to the rotor.

ice. Normally this will not be a problem - when normal operating conditions return the ice crystals will be converted to steam and removed from the unit via the exhaust air. In the case of extreme cold over extended periods the unit should be checked for ice.

life span of these components are limited to about 5 years, after which they will need to be replaced. An exhausted capacitor may damage the fan motor.

The capacitors must be replaced by a professional.

New capacitors can be ordered from Flexit (art. no. 110354).

6-12 months

12 months

3 years

5 years

*For units with extract air from the kitchen hood connected to the unit.

11 Troubleshooting

Type of fault Remedial action

Cold draughts Check what supply temperature has been selected. See control panel.

Check that the rotor is rotating.

Check that heating comes on.

New extract ﬁlter needed.

Fans not working Check that power is connected to the unit.

Check that the overheating thermostat has not cut out.

Reset by pressing the button. Must also be reset on the automatic panel. See chapters 1.4, 4.7 and 7.10.

Low air ﬂow rate Check what speed the unit is set to.

Check that the ﬁlters are tight.

Check the intake grille.

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12 CE Declaration of Conformity

This declaration confirms that the products meet the requirements in the following Council Directives and standards:

2014/30/EC Electromagnetic Compatibility (EMC) 2014/35/EC Low-voltage Directive (LVD) 1253/2014 Ecodesign regulation 1254/2014 Energy labelling regulation

Our products have been tested in accordance with parts of:

2006/42/EC Machinery Directive (Safety)

Producer: FLEXIT AS, Televeien 15, 1870 Ørje, Norway

Type: UNI 2 R Ventilation unit

Compliance with valid versions of the following standards on the date on which the declaration of conformity was signed:

Safety standard: EN 60335-1

EN 60335-2-80

EMF standard: EN 62233

EMC standard: EN 55014-1

EN 55014-2 EN 61000-3-2 EN 61000-3-3

The product is CE-marked: 2011

FLEXIT AS

29.11.2016

Frank Petersen

CEO

The right to give notice of lack of conformity applies to this product in accordance with the existing terms of sale, provided that the product is correctly used and maintained. Filters are consumables.

The symbol on the product shows that this product must not be treated as household waste. It must be taken to a reception station for recycling of electrical and electronic equipment. By ensuring correct disposal of the equipment, you will contribute to preventing negative consequences for the environment and

on recycling of this product, please contact your local authority, your refuse collection company or the company from which you purchased it.

Notice of lack of conformity as a result of incorrect or defective installation must be submitted to the installation company responsible. The right to give notice of lack of conformity may lapse if the system is used incorrectly or maintenance is grossly neglected.

health that incorrect handling may entail. For further information

Page 28

Flexit AS, Televeien 15, N-1870 Ørje www.flexit.no