Vallox 280 SE Instructions For Use And Maintenance Manual

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Page 1

• 1.09.372E

• 19.8.2008

• Code 3487 © VALLOX

INSTRUCTIONS FOR USE AND MAINTENANCE

DIGIT SED

ELECTRONIC CONTROLLER WITH LCD DISPLAY

Electronically controlled

supply / extract ventilation

with heat recovery

Page 2

Code: 3487

• Post-heating radiator: electric radiator 2.5 kW

• Preheating radiator: electric radiator 2.5 kW

• Letter L or R after the name of the unit indicates whether the unit is left- or right-handed.

1. USE OF VENTILATION

1.1. General use ................................................................................ p. 3

1.2. Local use..................................................................................... p. 3

1.3. Ventilation control ........................................................................ p. 3

1.4. Ventilation control with control panel.............................................. p. 3

1.5. Ventilation control with carbon dioxide sensor................................. p. 4

1.6. Ventilation control with humidity sensor........................................... p. 4

1.7. Ventilation control with voltage or current signal .............................. p. 4

1.8. Ventilation control with remote monitoring system............................. p. 4

1.9. Post-heating................................................................................. p. 5

1.10. Supply air constant temperature control .......................................... p. 5

1.11. Supply air cascade control............................................................ p. 5

1.12. Heat recovery bypass function....................................................... p. 5

1.13. Anti-frost function of heat recovery cell............................................ p. 6

1.14. Anti-frost function in a water-circulated post-heating unit.................... p. 6

1.15. Maintenance reminder.................................................................. p. 7

1.16. Filter guard function ..................................................................... p. 6

1.17. Booster / fireplace switch function ................................................. p. 7

1.18. Fault signal relay ......................................................................... p. 7

1.19. Air filtering.................................................................................. p. 7

2. CONTROL PANEL

2.1. Instructions for use........................................................................ p. 8

2.2. Operating menu .......................................................................... p. 8

2.3. Settings menu .............................................................................. p. 9

2.4. Week clock control...................................................................... p. 11

2.5. Factory settings........................................................................... p. 12

3. MAINTENANCE INSTRUCTIONS

3.1. Filters ......................................................................................... p. 13

3.2. Heat recovery cells....................................................................... p. 13

3.3. Fans ........................................................................................... p. 14

3.4. Condensing water connections ...................................................... p. 14

4. PRESSURE DIFFERENCE SWITCH ................................................................ p. 14

4.1. Pressure difference switch setting ................................................... p. 14

5. FAULT SITUATIONS ................................................................................... p. 15

5.1. Troubleshooting ............................................................................p. 15

VALLOX 280 SE

TABLE OF CONTENTS

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VALLOX 280 SE

INSTRUCTIONS FOR USE

DIGIT SED

ELECTRONIC CONTROLLER WITH LCD DISPLAY

1.4. Ventilation control with control panel

The control panel can be used for the following ventilation control functions:

Functions for adjusting ventilation power

• Starting and stopping.

• Power adjustment (8 positions).

• Setting the basic fan speed and the maximum fan speed. Ventilation power cannot be set lower than the basic fan speed. When carbon dioxide and/or relative humidity adjustments are activated, power cannot be adjusted higher than the set maximum fan speed. When humidity and carbon dioxide adjustments are switched off, fan speed can be raised to position 8 (factory setting). Maximum fan speed limitation can be selected at the settings menu to be in operation permanently (see the instructions for using the control panel, Section 2.3.6.).

• Adjusting power using the week clock control function.

Supply air temperature adjustment functions (post-heating unit is optional)

• Switching the electric post-heating unit on / off.

• Setting the desired supply air temperature (+10 °C...+30 °C).

• Selecting the method for controlling the desired supply air temperature (constant temperature control, cascade control of temperature ).

• Setting the desired supply air temperature using the week clock control function.

Preheating (the preheating unit is optional)

• Setting the control temperature for the preheating unit (-6 °C...+15 °C exhaust air).

• Changing the setpoints.

There may be three control panels at most. When more than one control panel is used, the unit can be adjusted at all the control panels.

CONTROL PANEL

SENSOR (OPTION)

LON CONVERTER (OPTION)

%RH SENSOR (OPTION)

1. Use of ventilation

1.1. General use

For indoor air to stay healthy and beneficial also for the structures of the dwelling, ventilation has to be in operation continuously. It is not advisable to stop ventilation even for longer holidays, because it makes indoor air stuffy. Also, during the heating season indoor air humidity may condense in the ducts and structures and therefore cause humidity damage. The sensors automatically adjust ventilation to an optimal level even if the dwelling is empty.

1.2. Local use

During local use, make sure that ventilation is sufficient for both occupants and structures. You have to ensure sufficient ventilation also outside the occupation period. Also take into account possible problems caused by the stopping of ventilation to both the unit and structures.

1.3. Ventilation control

The unit can be fully controlled with the control panel delivered with the unit or with an optional LON converter.

The standard week clock control can be used to control the fan power of the unit and the setpoint for supply air temperature.

Furthermore, demand controlled ventilation can be adjusted with optional carbon dioxide and humidity sensors.

The fan power of the unit can also be controlled with a voltage or current signal.

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VALLOX 280 SE

INSTRUCTIONS FOR USE

1.5. Ventilation control with carbon dioxide sensor (option)

• In carbon dioxide control, VALLOX 280 SE adjusts fan speed so as to keep carbon dioxide content in the ventilation zone below the setpoint. When two or more sensors are used, fan speed is adjusted according to the highest measuring result.

• 1 to 5 carbon dioxide sensors can be connected as options to the VALLOX 280 SE unit.

• The adjustment is switched on / off and, if needed, the setpoint (500…2000 ppm) is set at the control panel. The factory setting is 900 ppm. The recommended maximum carbon dioxide content in good indoor air is 1,000 ppm.

• When carbon dioxide control is on, the control panel may be used to raise fan speed to the maximum fan speed and to decrease it to the basic fan speed. In carbon dioxide control, maximum fan speed limitation is enabled.

1.6. Ventilation control with humidity sensor (option)

There are two methods for adjusting fan speed.

1. Automatic humidity setting, which is suitable for controlling humidity in washing rooms, for instance. The program records current humidity level and selects it as the setpoint, which it then uses as the target for drying air in a bathroom after a shower, for example. The setpoint automatically varies according to season, for instance, and is always at the right level. This setting is factory selected.

2. Humidity level can also be set fixed. The setting can range within the range of

1...99 %RH and is set at the control panel. This can be used in public saunas and swimming pools, for instance. The program aims at keeping humidity at the setpoint. The setpoint can be changed if needed.

The mode of adjusting is chosen at the controller. Recommended humidity content of good indoor air is approximately 45%.

• When this control is on, the control panel may be used to raise fan speed to the set maximum fan speed and to decrease it to the basic fan speed.

• In humidity control, fan speed varies between the basic and maximum fan speeds selected.

• When the unit is first taken into use with automatic setpoint search enabled (factory setting), it takes 3 to 10 hours for the program to define the value. During this time, humidity adjustment is not enabled (because the first value, selected at the factory, is 100%).

• Automatic search is enabled even if humidity control is not selected.

1.7. Ventilation control with voltage or current signal

• VALLOX 280 SE fan power can be controlled with a voltage or current signal coming from remote monitoring.

• The signal can be used to select speeds 0–8. However, the set maximum fan speed cannot be exceeded if carbon dioxide or humidity adjustment is active, or if maximum fan speed limitation has been selected at the settings menu to be in operation all the time (see the instructions for using the control panel, Section 2.3.6.).

• The signal changes the basic fan speed.

• The signal does not lock fan speed, i.e. fan speed can be changed at the control panel within the set limits. Carbon dioxide and humidity adjustment also operate within the set limits.

1.8. Ventilation control with remote monitoring system (option)

• With an optional LON converter, VALLOX 280 SE can be connected to an remote monitoring system.

• When VALLOX 280 SE is connected to the remote monitoring system, compatibility between the two needs to be ensured.

• The remote monitoring system can control the same functions as the control panel does.

• The remote monitoring system works in parallel with the control panel as well as carbon dioxide and humidity sensors.

Carbon dioxide sensor (CO2)

Humidity sensor (%RH)

1.5.

LON converter

1.6.

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VALLOX 280 SE

INSTRUCTIONS FOR USE

1.9. Post-heating (option)

For most of the year, heat recovered from the air being extracted is enough to warm the cold air coming from the outside to a suitable temperature. If the heat of extract air is not enough, air coming from the outside may be heated further, as needed, with a post-heating unit in the unit.

The post-heating radiator may be electric or water-circulating. Heating can in both cases be activated at the control panel (see the instructions for using the control panel, Section 2.1.). When heating has been activated, the unit automatically adjusts the temperature selected.

1.10. Supply air constant temperature control

• VALLOX 280 SE has a relative post-heating control; when the temperature selected exceeds supply air temperature by more than 2.5 °C, the radiator is on 100%, and when the temperature difference gets smaller, the period of active operation is automatically reduced in two-minute sequences. The adjustment range for heating is 10...30 °C.

• The heating radiator is on when the (

) sign is displayed.

• Temperature control is only active when post-heating has been switched on.

1.11. Supply air cascade control

• Supply air temperature control can be changed into cascade control.

• It changes the controlling principle of the post-heating radiator. The temperature of air blown to the ventilation zone is controlled on the basis of extract air.

• The program tries to keep supply air temperature at a value determined by the difference between extract air and the setpoint as follows: if extract air is warmer than the setpoint, supply air temperature is lower than the setpoint by the difference. If extract air is colder, supply air is higher than the setpoint by the difference.

If the temperature in the ventilation zone is 25 °C and the setpoint is 24 °C, the aim is to blow 23 °C air to the ventilation zone. If the temperature in the ventilation zone is 24 °C and the setpoint is 25 °C, the aim is to blow 26 °C air to the ventilation zone.

• The aim is to keep the temperature of air blown to the ventilation zone always within the range of 10...30 °C.

• Cascade control can be selected at the control panel, and it is active when post-heating has been switched on.

• The heating radiator is on when the (

) sign is displayed.

1.12. Heat recovery bypass function

• The bypass function tries to get as cool supply air as possible to the ventilation zone by comparing the measuring results of the outdoor air and extract air sensors.

• The heat recovery cell is bypassed when post-heating is switched off, outdoor air temperature is higher than the setpoint by two degrees and extract air is warmer than outdoor air.

• The setpoint can be changed within the range of 0…+25 °C. (Factory setting 12 °C.)

1.9.

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VALLOX 280 SE

INSTRUCTIONS FOR USE

1.13. Heat recovery anti-frost function and preheating

• The anti-frost function prevents the heat recovery cell from freezing, thus ensuring proper ventilation even during cold periods.

• Anti-frost is implemented by stopping the supply air fan. The stopping function is controlled on the basis of the measurement data given by the temperature sensor that measures the temperature of exhaust air after the heat recovery cell.

• The supply air fan stops when exhaust air temperature falls to the setpoint (factory setting +3 °C) and starts when exhaust air temperature has risen to the value set (hysteresis setting, factory setting +3 °C).

Preheating (option)

• The unit can be equipped with electric preheating in order to minimise the instantaneous stopping of the supply air fan. This ensures a maximally even supply air flow through the unit.

• The preheating radiator switches on when exhaust air temperature falls to the setpoint (factory setting +5 °C) and switches off when exhaust air temperature has risen to the value set (hysteresis setting, factory setting +3 °C).

• In order to ensure the operation of the preheating unit, the setpoint of exhaust air temperature must be higher than that of supply air fan stopping temperature.

1.14. Anti-frost function in a water-circulated post-heating unit

• The anti-frost function aims at preventing a water-circulating post-heating unit from freezing. The automatic function stops the supply and extract air fans as soon as outdoor air temperature falls below 0 °C and supply air temperature below +7 °C, in which case also the control valve becomes wide open. The control panel displays the fault message FREEZING ALERT, irrespective of display.

• The fans start automatically as soon as supply air temperature exceeds 10 °C.

1.15. Maintenance reminder

• The maintenance timer switches on the maintenance reminder symbol ( ) in the main display of the control panel at defined intervals, the factory setting being 4 months.

• The maintenance reminder symbol is reset at the control panel (see the instructions for using the control panel, Section 2.3.10.).

• The interval can be set within the range of 1...15 months at the control panel.

1.16. Filter guard function

• If the unit is equipped with pressure difference switches monitoring the supply and/or extract air filters, they light up the filter guard symbol (

) in the main display of the control panel when pressure has risen above the setpoint. At the same time, the points of the fault signal relay are closed.

• The operation threshold for a pressure difference switch is adjusted to correspond to the ventilation power position. The adjustment of the operation threshold can be made at the controller of the pressure difference switch (see Pressure difference switch setting, Section 4.1.). The factory setting (275 Pa) corresponds to ventilation power position 8.

• The maintenance timer operates normally during this function.

Pressure difference switch

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VALLOX 280 SE

INSTRUCTIONS FOR USE

1.17. Booster / fireplace switch function

Booster switch function

• The booster switch raises the fan speed to the set maximum speed for 45 minutes.

• The function is started at the main display of the control panel by simultaneously pressing and holding down the + and - buttons for 2 seconds.

• The function can also be started at a separate auto-reset push-button switch, wired from the connection box of the unit to a wall in the fireplace room, for instance. Upon each pressing, the stopping function continues for 15 minutes (the switch is not included in the delivery).

• During the function, the fireplace/booster switch symbol (

) is visible in the main display

of the control panel.

Fireplace switch function

• The fireplace switch stops the extract air fan for 15 minutes and produces overpressure in the ventilation zone. This makes it easier to light the fireplace, for instance.

• The function is started at the main display of the control panel by simultaneously pressing and holding down the + and - buttons for 2 seconds.

• The function can also be started at a separate auto-reset push-button switch, wired from the connection box of the unit to a wall in a classroom, for instance. Upon each pressing, the booster function continues for 45 minutes.

• During the function, the fireplace/booster switch symbol (

) is visible in the main display

of the control panel.

• The function is selected at the control panel (see Section 2.2.1.).

NOTE! The starting of the extract air fan may weaken draught in the fireplace. During cold winter seasons, the flowing of cold air to the extract ducts may cause the anti-freeze and anti-

frost functions to start. If the post-heating radiator does not contain non-freezing solution, there is a freezing risk. The situation will normalise in a while, after the functions stops.

1.18. Fault signal relay (remote monitoring)

• The fault signal relay has potential-free points (24 VDC, 1 A).

• The points provide information on various faulty states of the unit.

• When the anti-frost function of the water-circulating radiator is on, the points of the relay close and open at a 10 seconds interval.

• Alarm of high carbon dioxide content switches the relay at 1-second intervals.

• In other fault situations, the points are closed.

1.19. Air filtering

VALLOX 280 SE features coarse filtering of both extract and supply air before the fans. The unit has F7 and G3 class fine and coarse filters on the supply side, and a G3 class coarse filter on the extract side. The filters need to be in place in the unit whenever ventilation is in operation.

A F5 extract air filter is available as an option.

F5 (option)

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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

VALLOX 280 SE

INSTRUCTIONS FOR USING THE CONTROL PANEL

1 2 3 4

5 6 7 8

2.2. Operating menu

In order to move the control panel to the settings menu, press the + and – buttons simultaneously. In the settings menu, you can change setpoints for the ventilation unit.

The content display shows humidity and carbon dioxide content. The corresponding sensors are required (options).

The temperature display shows the temperatures of outdoor air, indoor air, supply air and exhaust air. The accuracy of the temperature sensors is ± 2 °C.

Supply air temperature setting is changed with the + and – buttons.

2.2.1. Main display and change of fan speed

2.2.2. Moving to the settings menu

2.2.4. Content display

2.2.5. Temperature display

2.2.6. Setting supply air temperature

Fan speed can be changed in this display with the + and – buttons (see section 2.1., items 7 and 8 in the figure).

The displays of the operating menu (sections 2.2.1.–2.2.6.) can be scrolled with the scrolling buttons (see section 2.1., items 5 and 6 in the figure).

To settings menu See manual

RH1 35% RH2 40% CO2 0821 PPM

Out 20 In 20 Sup. 20 Exh. 20

Temp. setting 20C

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.

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.

2.1. Keyboard

Power failure

After a power failure, the unit starts at minimum fan speed. The adjustments and setpoints chosen will remain in the memory of the unit in spite of the power failure.

2. Control panel

Start button

With this button, you switch the unit on and off. When the indicator is lit, the unit is on.

21 C

10:20

Week clock control can be activated by pressing the + button and deactivated by pressing the – button. Week clock control is on when the symbol of week clock control is shown in the main display. In week clock control, the basic fan speed and supply air temperature of the unit are adjusted in accordance with the programme in section 2.3.4.

2.2.3. Week clock control

Week program on

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VALLOX 280 SE

INSTRUCTIONS FOR USING THE CONTROL PANEL

2.3. Settings menu

You can reach the settings menu from the operating menu as indicated in section 2.2.2. The displays of the settings menu (sections 2.3.1.–2.3.26.) can be scrolled with the scrolling buttons (see section 2.1., items 5 and 6 in the figure).

2.3.1. Setting the basic fan speed

The desired basic fan speed (minimum fan speed) is selected with the + and – buttons. Active when week clock control is not on. Week clock control changes this speed.

MIN speed 1

2.3.2. Moving to the operating menu

You can return to the operating menu by pressing the + and – buttons simultaneously.

To main menu Press + and -

The maximum fan speed setting can be selected to be active either in connection with (carbon dioxide and humidity) adjustments or permanently. The selection is done with the + and – buttons.

2.3.6. Mode of operation of the maximum speed setting

MAX Speed limit with adjustments

Select the desired language (German, English, Swedish, French or Finnish) with the + and – buttons.

2.3.7. Choosing the language version

Kieli / Language English

The general factory settings can be restored by pressing the + and – buttons simultaneously. Remember to ensure that the setpoints are in accordance with the factory settings for this unit. Especially, check the unit model (electricity / water) and change if needed as stated in section

2.3.20.

2.3.8. Restoring factory settings

Factory settings see manual

The adjustment interval for humidity and carbon dioxide adjustments is selected with the + and – buttons. The adjustment interval refers to minutes.

2.3.9. Adjustment interval

Adjust interval 10

The maintenance reminder is reset by pressing the + and – buttons simultaneously. This turns out the maintenance reminder symbol ( ) in the main display.

2.3.10. Resetting the service reminder

Mainten. reset Press + and -

The contrast setting for the control panel display is changed with the + and – buttons.

2.3.11. Contrast of the control panel display

Display contrast 05

The week programme can be totally erased by simultaneously pressing the + and – buttons.

2.3.3. Erasing the week programme

Erase week prog. Press + and -

You can access the programming mode for the week clock programme by simultaneously pressing the + and – buttons. See section 2.4.1.

2.3.4. Week programme programming

Adjust week prog. Press + and -

You can adjust time by simultaneously pressing the + and – buttons. For more details, see section

2.4.2.

2.3.5. Adjusting time

Adjust time Press + and -

The address of the control panel is changed with the + and – buttons. Two control panels cannot have the same address. If control panels have the same address, they will go to the bus fault state and will not operate.

2.3.12. Address of the control panel

Panel address 1

The desired adjustment value for the DC fan is selected with the + and – buttons. The rotation speed of the extract air fan can be lowered by decreasing the percentage value. If the unit has alternating current fans, this adjustment has no impact on the operation of the unit.

2.3.13. Adjusting the direct current fan on the extract air side

DC fan exhaust 100%

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The preheating temperature for the anti-frost function in the heat recovery cell is chosen with the + and – buttons.

2.3.24. Pre-heating temperature for the anti-frost function in the heat recovery cell

Preheater 07C

VALLOX 280 SE

INSTRUCTIONS FOR USING THE CONTROL PANEL

The hysteresis of the anti-frost function in the heat recovery cell is selected with the + and – buttons.

2.3.22. Hysteresis of the anti-frost function in the heat recovery cell

Hysteresis 03C

The interval for the maintenance reminder is selected with the + and – buttons. The maintenance reminder interval refers to months.

2.3.21. Choosing maintenance reminder interval

Maintenance rem. 04

A water or electric radiator is selected with the + and – buttons, depending on the type of postheating radiator the unit is equipped with.

Note! Choosing the wrong type of post-heating causes a faulty post-heating function.

2.3.20. Choosing post-heating for the unit

Radiator type electric rad.

The basic humidity level can be chosen as either automatic or manual. The selection is done with the + and – buttons.

2.3.19. Choosing the basic humidity level

Rh-level setting automatic

The desired setpoint is chosen with the + and – buttons when manual adjustment has been selected as the Rh level setting (humidity setting, section 2.3.19).

2.3.16. Setpoint of the basic humidity level

Basic %RH level 40%

The desired cell bypass temperature is selected with the + and – buttons. If outdoor temperature is lower than cell bypass temperature, the summer / winter damper is in the winter position.

2.3.15. Changing the operating temperature of heat recovery cell bypass

Cell bypass 10C

The desired adjustment value for the DC fan is selected with the + and – buttons. The rotation speed of the supply air fan can be lowered by decreasing the percentage value. If the unit has alternating current fans, this adjustment has no impact on the functioning of the unit.

2.3.14. Adjusting the direct current fan of the supply air side

DC fan - supply 100%

The mode of operation of the switch (either fireplace or booster switch) is selected with the + and – buttons.

2.3.17. Mode of operation of the fireplace / booster switch

Switch type Fireplace switch

Cascade control is activated or deactivated with the + and – buttons.

2.3.18. Choosing cascade control for supply air temperature

Cascade adjust Off

The setpoint for CO2 adjustment is chosen with the + and – buttons.

2.3.25. Changing the setpoint for carbon dioxide adjustment

CO2-setting 0900 PPM

The desired maximum fan speed is selected with the + and – buttons. Maximum fan speed is on either with adjustments or permanently. See section 2.3.6. Mode of operation of the maximum speed setting.

2.3.26. Choosing maximum fan speed

MAX speed 8

The stopping temperature of the supply air fan for the anti-frost function in the heat recovery cell is chosen with the + and – buttons.

2.3.23. Stopping temperature of the supply air fan for the anti-frost function in the heat recovery cell

Supply fan stop 05C

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VALLOX 280 SE

INSTRUCTIONS FOR USING THE CONTROL PANEL

2.4. Week clock control

The week programme can be used to set the desired fan speed (basic fan speed) and supply air temperature for each hour of the day on seven days a week. The week programme overrides manual adjustments. Carbon dioxide and humidity adjustment can increase fan speed but never decrease it below the basic fan speed set in the week programme.

2.4.1. Week programme programming

D Hr Sp Tmp 1 12 5 20 Exit

Cursor

D Day 1…7

1 = Monday, 2 = Tuesday, etc. Hr Hours, 0…23 Sp Fan speed, 1…8 Tmp Supply air temperature, 10...30 ºC Exit Save the setting and exit N No change to previous

Example: Monday

Fan speed is increased to speed 2 and supply air temperature to 17 ºC between 07:00 (7 a.m.) and 17:00 (5 p.m.) hours. After that, fan speed is raised to speed 4 and supply air temperature to 20 ºC. For the evening, fan speed is boosted to speed 6 between 19:00 and 21:00 hours (for the period when a sauna bath is taken), after which fan speed is lowered back to 4.

Move the cursor with the arrow keys and change values with the + and – buttons. Note that Exit and saving are done when the programming is finished by moving the cursor below the word Exit and pressing + or –.

Changes in fan speed (Sp) and supply air temperature (Tmp) are only made for the hours desired; in other cases, use N (no change to previous).

Monday (D = 1), 07:00 hours (H = 7), fan speed 2 (Sp = 2), supply air temperature 17 ºC (Tmp =

17). Move the cursor to the following hour.

Monday (D = 1), 16:00 hours (H = 16), fan speed 4 (Sp = 4), supply air temperature 20 ºC (Tmp = 20). Move the cursor to the following hour.

Monday (D = 1), 19:00 hours (H = 19), fan speed 6 (Sp = 6), supply air temperature unchanged (Tmp = N). Move the cursor to the following hour.

Monday (D = 1), 21:00 hours (H = 21), fan speed 4 (Sp = 4), supply air temperature unchanged (Tmp = N). Move the cursor to the following day.

Similar changes have to be made separately for each day. Finally, exit the programming mode by selecting Exit. If you wish, you can erase the week programme as indicated in section 3.3.3. You can then start programming from the start. You can see the settings programmed by choosing a day and by scrolling the hours with the + or – button.

D Hr Sp Tmp 1 7 2 17 Exit

D Hr Sp Tmp 1 16 4 20 Exit

D Hr Sp Tmp 1 19 6 N Exit

D Hr Sp Tmp 1 21 4 N Exit

Move the cursor with the arrow keys and change values with the + and – buttons. Exit and saving are done when the programming is finished. Monday (D = 1), hours 15 (H = 15), minutes (M = 30). Time is maintained even though there is a power failure.

2.4.2. Adjusting time

day hour min 1 15 30 Exit

day Day 1…7

1 = Monday, 2 = Tuesday, etc. hour Hours, 0…23. min Minutes 0…60 Exit Save the setting and exit

Cursor

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VALLOX 280 SE

INSTRUCTIONS FOR USING THE CONTROL PANEL

Basic fan speed = 1 Maximum fan speed = 8 Carbon dioxide adjustment (CO

) = 900 ppm CO

Adjustment interval = 10 min Freezing protection (cell) = 3 °C Freezing protection hysteresis = 3 °C Preheating setting = 5 °C Maintenance reminder = 4 months Cell bypass = 12 °C Cascade control = not used Humidity level (RH level) adjustment = automatic Switch type = booster switch

2.5. Factory settings

VALLOX 280 SE has the following factory settings

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VALLOX 280 SE

MAINTENANCE INSTRUCTIONS

3. Maintenance instructions

General

• The unit has a two-part door. When you take off the upper

door, the safety switch (T) turns voltage off. The upper door is always opened first and shut last.

• If maintenance is only done for the filters, it is enough to

take off the upper door. When also other maintenance activities are done, both doors have to be taken off.

3.1. Filters

• The unit comes standard with G3 class coarse filters for

outdoor and extract air and an F7 class fine filter for supply air. An F5 class fine filter for extract air is available as an option. The filters need to be cleaned or replaced with new filters at regular intervals (2…4 times a year) and depending on dirtiness.

• If the unit is equipped with filter guards, they show a

symbol (

) in the main display of the control panel or in remote monitoring when the filters need to be cleaned and replaced with new ones when necessary.

REMEMBER!

Clean the filters when needed, preferably 2…4 times a year. Set the maintenance reminder interval according to your needs (dependent on the cleanliness of outdoor and indoor air). See the instructions in Section 2.3.21.

Filter maintenance:

• Open the fixing screws of the upper door of the unit.

• Lift the door off.

• Check if the filters are clean.

• A G3 class (blue and white) filter can be cleaned with +25 °C...+ 30 °C water and washing-up liquid. It must not be washed or dried roughly, but by pressing gently. When washing is done properly, filters stand cleaning 4 to 5 times.

• F5 and F7 class filters (fabric filters) cannot be washed, but they can be cleaned by carefully blowing compressed air against the direction of contamination (F5 is optional). When necessary, the filters have to be replaced with new ones. The recommended replacement interval, depending on the circumstances, is 2 to 4 times a year.

Other cleaning

• In connection with maintenance, also check the internal cleanliness of the unit: preheating and post-heating units, bottom reservoir and internal casing. Remove dirt with a vacuum-cleaner, brush, damp cloth, etc.

• It is absolutely forbidden to let water run into the electrical devices!

3.2. Heat recovery cells

• The heat recovery cells in the unit may get dirty in spite of the filters. Because of this, the cleanliness of the cells must be checked at regular intervals, approximately once a year. It is recommended to do the checking in connection with filter maintenance.

• The cells can be taken out of the unit by pulling the ears on the end plates outward. Dirty cells can be washed either by first spraying a washing-up liquid on the cells or by sinking them in water containing washing-up liquid. After this, rinse them clean with a water shower. Let the cells drain dry and then mount them back in place. When remounting the cells, pay attention to the “up” stickers in the cells.

Upper door

F5 (option)

Heat recovery cell

Lower door

Socle moulding

Page 14

VALLOX 280 SE

MAINTENANCE INSTRUCTIONS

Pressure difference switch

Connection box cover

Fixing screw (4 pcs)

Quick couplings

Supply air fan

Extract air fan

Fixing screw (4 pcs)

Quick couplings

3.3. Fans

• It is a good idea to check the cleanliness of the fans in connection with the maintenance of the filters and heat recovery cells. Clean them when needed.

• You can take the fans off by opening the fixing screws (4 screws) and the quick couplings of the conductors. You can clean the fan blade by blowing it carefully with compressed air, brushing with a brush or by using a damp cloth to wipe each blade so clean that the fans stay in balance. Also clean the fan hoods.

• Rinsing water into the fan motor is absolutely forbidden!

3.4. Condensing water connections

• During maintenance, also check the unit’s reservoir and the condensing water connections.

• To see the condensing water connections, remove the socle. If a condensing water tank is in use, it can be drawn out by pulling it forward. The tank can be removed for emptying and cleaning.

• When the condensing water outlet is in use, check its condition and make sure it is not clogged.

4. Pressure difference switch

4.1. Pressure difference switch setting

You can modify the operating threshold of a pressure difference switch as follows:

Remove VALLOX 280 from the electric circuit by switching off input voltage at the distribution panel, for instance.

1. Take off the upper door of the unit.

2. Take off the cover of the connection box located inside the unit.

3. Take off the cover of the pressure difference switch and turn the adjustment wheel to the desired setpoint (see the figure and the adjoining table).

Taking off the cover of the pressure difference switch

Ventilation power position Supply air filter F7

Pressure difference switch

(PDS1)

Extract air filter G3

Pressure difference switch

(PDS2)

Extract air filter G3+F5

Pressure difference switch

(PDS2)

1 100 100 125 2 125 125 150 3 150 150 175 4 175 175 225 5 200 200 250 6 225 225 300 7 250 250 325 8 275 275 350

Page 15

VALLOX 280 SE

Outdoor air coming to the dwelling is cold.

SYMPTOM REASON DO THIS

• Air cools down in the attic ducts.

• The heat recovery cell is frozen, which is why extract air cannot heat outdoor air.

• The post-heating radiator does not work.

• The extract air filter or the cell is clogged.

• The initial adjustment of ventilation has not been done.

• Check the insulation of the attic ducts.

• If the heat recovery cell is frozen, check the setpoint for freeze protection. The setpoint for freeze protection can be raised by 1 or 2 °C, or the sensor can be bent closer to the cell, in which case the supply air fan stops earlier (see the instructions for using the control panel, Section 2.3.23.). Thaw the cell before closing the door.

• If the post-heating radiator does not operate, check to see if overheating protection prevents it from operating: press the overheating protection reset button, and measure the temperature of supply air inside the unit when the door is closed. If the radiator does still not work, contact a maintenance company.

• Check if the filters and the heat recovery cell are clean.

Supply air fan keeps stopping.

• HR cell anti-frost is in operation.

NOTE! If you decrease the setpoint too much, the cell may freeze. Compare with list item 1.

• The fan stops more rarely and the efficiency of the heat recovery cell gets better when the setpoint is decreased by 1 or 2°C. (See the instructions for using the control panel, Section 2.3.23.)

Supply air fan stops and starts too frequently.

• The difference between the stopping and starting temperatures is too small.

• The preheating radiator does not work.

• Raise the difference between the stopping and starting temperatures by 1 or 2 °C. It extends the period between stopping and starting. (See the instructions for using the control panel, Section 2.3.22.)

• If the preheating radiator does not operate, check if overheating protection prevents it from operating: press the overheating protection reset button, and measure the temperature of outdoor air inside the unit before the heat recovery cell when the door is closed. If the radiator does still not work, contact a maintenance company.

Maintenance reminder symbol (

) is displayed and the unit operates otherwise normally.

• Maintenance reminder lights up the maintenance reminder symbol in the main display of the control panel at circa 4month intervals (factory setting).

• The interval can be changed (see Instructions for using the control panel, Section 2.3.21.).

• Check the cleanliness of the filters and the unit. If needed, clean or replace the filters. Also check the external grille.

• Reset the maintenance reminder symbol to make it disappear. (See the instructions for using the control panel, Section 2.3.10.)

“Exh air sensor faulty” is displayed and the unit has stopped.

• There is a fault in the extract air sensor.5• Contact a maintenance company. Sensor mounting needs to be checked and the sensor has to be replaced if necessary.

"Sup. air sensor faulty" message is displayed and the unit has stopped.

• There is a fault in the supply air sensor.6• Contact a maintenance company. The sensor installation must be checked and if necessary the sensor replaced.

"In air sensor faulty" message is displayed and the unit has stopped.

• There is a fault in the freezing protection

sensor.

• Contact a maintenance company. The sensor installation must be checked and if necessary the sensor replaced.

"Out air sensor faulty" message is displayed and the unit is stopped.

• There is a fault in the outdoor air sensor.8• Contact a maintenance company. Sensor mounting needs to be checked and the sensor has to be replaced if necessary.

FAULT SITUATIONS

5. Fault situations

5.1. Troubleshooting

Page 16

"Bus fault" message is displayed and the unit operates at speed 1 (check the fan speed).

• Wiring fault in the carbon dioxide sensor, in the control panel or in the humidity sensor.

• Contact a maintenance company. The connections have to be checked and corrected if necessary.

"Freezing alert" message is displayed and the unit is stopped.

• Anti-frost of the water-circulating radiator is active.

NOTE! If there is no non-freezing solution in the water of the radiator, the radiator is at risk of freezing.

• Immediately troubleshoot the situation. Consult a maintenance company to find out if there is any nonfreezing solution in the radiator. Check if the circulation pump is broken, the boiler out of operation etc. The situation may pass by itself as soon as supply air temperature exceeds 10 degrees, but do not wait till it happens.

The desired automatic adjustment does not stay on.

• There is a fault in the humidity or carbon dioxide sensor, one of the sensors is broken or missing.

• Contact a maintenance company. The sensor installation and connections have to be checked. (The sensors are optional.)

The unit does not work, the fans are not running and no indicator light is lit in the control panel.

• The door switch may be broken, or the door is possibly not quite closed.

• The unit is out of power, e.g. because a fuse has blown.

• The glass tube fuse (located in the control card behind a protecting plate) the electronics inside the unit may have blown.

• Check the door switch and fuses. The unit includes a T800 mA glass tube fuse.

• If needed, contact a maintenance company (e.g. to check the glass tube fuse).

The unit does not obey the control panel.

• Remove or switch off the power supply fuse of the unit, located in the distribution panel, or the circuit breaker. Wait for 30 seconds and put the fuse back, or switch the circuit breaker on. If this does not help, contact a maintenance company.

"Carbon dioxide alarm" message is displayed and the unit is stopped.

• Carbon dioxide alarm. Carbon dioxide content has exceeded 5000 PPM for more than two minutes. May be caused by a fire.

• If there is a fire, take the necessary steps.

• You can put the unit in working order by disconnecting the plug from the wall socket, waiting for 30 seconds and connecting the plug again.

• Check the cleanliness of the filters and the unit. If needed, clean or replace the filters.

1.09.372E/19.8.2008/PDF

VALLOX 280 SE

Vallox Oy FIN-32200 Loimaa Finland Telephone +358 2 7636 300 Fax +358 2 7631 539

Internet: www.vallox.com.

FAULT SITUATIONS

After a power failure, the unit starts at minimum fan speed. All the other selected adjustments and setpoints remain in the memory of the unit.

The filter guard symbol (

) is displayed and the unit operates otherwise normally.

• Pressure in the filter guard (pressure difference switch) has exceeded the setpoint.

SYMPTOM REASON DO THIS