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USER GUIDE
LTR-3, LTR-6 and LTR-7
1.
Place the unit on the insulation plate (i.e. 100 mm insulation covered with chipboard) in a storage room or in the
attic on a custom made shelf. Take into consideration the possible need for a drain.
2.
Check that there is enough free space on top (above the service hatch) (LTR-3 min. 50 cm, LTR-6 min 60 cm,
LTR-7 min. 70 cm) and that the electrical inlets are accessible. Take into consideration that opening the hatches
require a certain amount of space.
3.
Connect the ducts to the spigots on the unit. It is recommended that silencers be installed to the exhaust air and
supply air ducts.
4.
If the unit’s condensation drain is to be used, connect a pipe between the drain outlet and the nearest floor
drain or water trap of a sink. Connecting the unit directly into the sewerage system is not allowed. If the unit is
installed in a cold room the drain pipe must be inslulated so that it doesn’t freeze.
N.B! Detailed dimension drawings con be found in Chapter Technical information in the end of this manual.
USER GUIDE
STARTING THE UNIT
Before the unit is ready for use the following installations should take place:
-
Assemble the unit as stated in the chapter Instalaltion in this manual. Check with a water level to make sure that
the unit is level, this is crucial for the drainage to work.
-
Connect the drainage outlet with its own hose to an outflow supplied with a water lock (if the unit ventilates a
space with swimming pool or if it is equipped with cooling).
-
Instalel the duct and the silencers.
-
Assemble the terminals on to the ducts.
-
Provide the outside air duct with an outside air grating (N.B! the grating must not be provided with an insect net
because it is difficult to keep clean!)
-
Make the roof pass-through. We recommend the use of a factory made, insulated roof pass-through.
-
Insulate the ducts as instructed.
-
Provide the unit with the appropriate power supply.
-
Connect the control panel to the unit with the RJ11 cable provided.
Open the units maintenance hatch with the key provided when all the above mentioned installation work is done. Check
that the unit is clean on the inside, that there are no spare parts inside the unit and that the filters are clean. Close the
maintenance hatch carefully.
SUPPLY AND EXHAUST AIR CALIBRATION
After the unit has been switched on its airflows must be calibrated to its planned values. When making the calibration all fil-
ters should be clean, all supply and exhaust air valves, the roof pass-through and the outside air grating should be in place.
The outside air grating must not be provided with an insect net. The exhaust air flow should be ca. 5 - 10 % higher than
the supply air flow. To achieve optimal values during calibration the airflows should be measured at each duct opening.
A suitable measuring instrument would be a thermo anemometer. With the help of registered values the airflow can be
regulated to achieve the projected values. A correctly calibrated ventilation unit is quiet and gives a good heat return and
it also upholds a small under-pressure in the house. The under-pressure stops humidity from entering the walls and ceiling.
In EC- and ECE –models it is possible for the supply air fan to run one speed slower than the exhaust air fan. This is done by
connecting pins -1 (TFC) on the main board.
To make it easier to adjust the air amount in eco EC and eco ECE-models, the speed (-20 %...+10 %) of the supply air fan can
be adjusted with the trimmer on the main switch board. The regulation is proportional for the different speed positions.
I.e. the regulation -10 % on speed setting 4 (100 %) means the exhaust air fan runs on 100 % and the supply air fan on 90
%, on speed setting 3 (80 %) it means the exhaust air fan runs on 80 % and the supply air fan on 72 %, on speed setting 2
(60 %) it means the exhaust air fan runs on 60 % and the supply air fan on 54 % and on speed setting 1 (40 %) it means the
exhaust air fan runs on 40 % and the supply air fan on 36 %. When the exhaust and supply air fan run on the same speed
the speeds are (1) 40 %, (2) 60 %, (3) 80 % and (4) 100 %. Each of the speeds can be reduced max 20 % with the switch board
trimmer. There are totally 5 trimmers on the board.
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