Section 6 – Control / Service menu
The bypass is opened
(heat recovery is disabled) when all of the following conditions are fulfilled:
•
Current date is within the set switching period (User menu /Adjust User Settings / Set up Summer Bypass)
and
•
Extract-air temperature is at least 1°C above the set switching temperature and
•
Fresh-air temperature is at least 1°C below the set switching temperature
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 activated 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)
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Section 4 – Installation
•
Remove the front and top cover and take the EPP unit out of the metal backplate.
•
Offer up the backplate to the wall and mark out the mounting points, ensuring the unit is level.
•
Secure the backplate to the wall using appropriate fixings.
If installing on a hollow wall, suitable anti vibration fixings may be required.
•
If required, the unit can be fixed using left and right side fixing holes (E.g. If the unit is fixed inside a
cupboard).
•
Remount the unit into the backplate and secure the top and front cover.
NOTE!
Check that the unit is positioned level in order to ensure proper condensate discharge.
4.3 Condensate discharge lines
There are two condensation collection trays built into the expanded poly propylene housing (EPP) of the unit
and two (provided) condensate collection unions must be fitted to the discharge points on the bottom side of
the unit.
•
Remove the front cover from the installed unit. Take care to remove the umbilical connector from the
Display PCB.
•
Pull out the EPP cover and remove the heat exchanger using the pull strap.
•
Remove the back-nuts from the condensate unions (provided) and then push them through the two EPP
drain holes.
Note: Additional leak proofing of the union may be required.
•
Secure the two unions to the backplate using the back nuts.
•
Replace the heat exchanger and EPP cover.
•
Re-fix the front cover, remembering to reattach the umbilical connector to the Display PCB.
•
Connect drain hoses to the two unions and take to a suitable drain trap.
NOTE!
The location of the ventilation unit, as well as the condensate discharge hoses, must be frost-free!
When connecting up to the drainage pipe of the building, the following points must be observed:
4.3.1 Air infiltration and Infiltration of sewer gases
Any air infiltration into the ventilation unit via the condensate hose must be prevented.
Both condensate hoses must be looped and inclined as shown in Fig 4.3 in order to trap a loop of water and
prevent air getting back into the unit via the hoses.
(1 metre length of hose is supplied with each unit)
.
The hoses must go via a funnel or tundish to a suitable water trap as shown below.
The condensate hoses from the ventilation unit must not be connected directly to the drainage pipe.
Fig. 4.3 Condensate drain connection (schematic)
NOTE!
Both condensate hoses MUST be made, and
separately run to their own drain connection.
DO NOT “common up” the two hoses.
1 Ventilation unit
2 Looped to act as a condensate trap
3 Condensate line with downward gradient
4 Funnel or tundish to provide air gap
5 Water trap to prevent bad odours entering the room
6 Drainage line with min. 2% downward gradient
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