Section 6 – Control and Service menu
The bypass is closed (heat recovery is enabled), when all of the following conditions are fulfilled:
Extract-air temperature is at least 3°C below the set switching temperature and
Fresh-air temperature is 1°C above Extract-air temperature
6.4.2 Filter monitoring / filter message
The filter is monitored on the basis of a time interval. At the end of this interval, a message reminds the user
of filter maintenance with a text message and flashing display.
The interval is set in the User menu – Adjust User settings, and can be set within a range of 2…12 months.
(Default setting is 6 months). The time interval can be changed at any time.
Filter reset:
When the “Replace Filters” message is displayed:
Press the OK button to show “Filter replaced?” Use the or buttons and OK to select “Yes” or “No”.
NOTE!
The filter interval is not reset through power failures or when the ventilation unit is switched off.
6.5 Internal safety functions
6.5.1 Function for safe use with open flue fuel burning devices.
(Only to be used if permitted by relevant regulations in your country of use).
(Prevents flue gases being drawn back into the room)
The ventilation unit has an integrated function for safe use with open flue fuel burning devices.
This function is enabled when jumper L13 on the display circuit board is removed.
(Indicated by an “F” in the standard display).
When this function is enabled the flow rate of the Supply fan is automatically increased.
NOTE!
The addition of proprietary external controls, suitable for use in rooms containing an open flue
burning devices, is strongly recommended.
The unit has two configurable Flue Detection inputs for use with external controls.
(See Section 6.3.2 on how to setup the Flue Detection inputs)
WARNING:
The higher flow rates set when this function is on must be verified as adequate for the application.
If the flow rates need to be changed then use “Installer Menu – Change Settings – Set Fan Speeds
when Flue in use”.
(See Section 6.3.2 on how to setup the Flue Detection inputs)
WARNING:
IF THE HIGHER FLOW RATES REQUIRED FOR OPEN FLUE ROOMS ARE NOT CORRECTLY SET THERE IS
A DANGER THAT FLUE GASES COULD BE DRAWN BACK INTO THE ROOM, WITH THE
CONSEQUENTIAL RISK OF SERIOUS INJURY OR DEATH.
WARNING:
Settings must only be changed by a qualified technician. If in doubt, we recommend you consult a
qualified specialist.
37
