6
If there is a need to reduce the control signal voltage (in
connection with the ventilation control) for
inlet or exhaust fan there is a potentiometer in DIVK-C91 C
electrical enclosure.
The supply fan voltage can be reduced 0-2 V by turning
counter-clockwise.
The exhaust fan voltage can be reduced 0-2 V by turning
clockwise.
This adjustment must not be changeed after adjusting
the air flow.
AIR VOLUME RATIO TRANSFORMATION
FOR SUPPLY AND EXHAUST AIR FLOW (Balance adjustment)
Balance adjustment
-1v
-2v
Supply
Exhaust
-2v
-1v
BEFORE OPERATING YOUR AIR EXCHANGE SYSTEM,
MAKE SURE THAT:
- There are no loose objects within the un it o r th e air impeller;
- The coverings of construction-time are removed from
the outlet- and exhaust air holes;
- All isolations and steam barriers are in order;
- The heat transfer and fans are in their places;
- The condensing water outlet is installed and the water
is drained out;
- The air impellers and their adjusters are in workin g order;
- Afterheating is regulated and working.
USAGE DURING CONSTRUCTION
The air exchange unit should be started as soon as
the construction work allow.
Efficient air exchange promotes drying of the constructions
and prevents damage.
In case channelling has not been completed, fans and adjustments
are missing,filter paper must be used in place of fans to keep
the channels clean andprovide sufficient counterpressure for
preventing overload. The unit must be used with full power and
check the drainage of the condensing water.
The appliance, filters and heat exchangers must be cleaned
and the systemadjusted after the construction works are
completed.
BASIC ADJUSTMENT OF AIRFLOW
The unis alone can not produce good indoor air in case the
channels and fans are installed carelessly and main
adjustments are not made.
Regulate the inlet and outlet fans to the planned positions
and start the unit at design power speed. Measure the
airflow in outside- and exhaust air channels.
The outlet must be 5-10% higher than inlet. Check the
pressure level of thechannels by checking from the vents and
adjust it accordingly to obtain the pressure levels
for vents; adjust and lock the pattern.Draw measuring- and
adjustment records!
THE INTRODUCTION OF THE VENTILATION UNIT
THE SUMMER BYPASS OF THE HEAT RECOVERY UNIT MUST BE IN THE WINTER POSITION WHEN THE
AIRFLOWS ARE BEING ADJUSTED.
USAGE AND CORRECT LEVEL OF AIR EXCHANGE
The air exchange level is regulated by changing the
working speed of the air impeller from the operating panel.
Airflow of different adjustable positions can be seen
from table 2.
Adjustable position 1 is for basic air exchange for an empty house.
Adjustable position 2 and 3 are normal working positions.
Adjustable position 4 is efficiency positions (i.e. for saunas).
The correct usag e positions will be found by experience;
observing the purity of the air or sultriness when coming in
from ou tsi de, observing moisture on the windows or drying
of the sau na.
