VALLOX 75/95
T
T
P
L
Y
Y
ø 12mm
© VALLOX • We reserve the right to make changes without prior notification.
7
INSTRUCTIONS FOR USE
Curve 1
Temperature of the air coming from the unit to the dwelling at
different outdoor temperatures when the post-heating radiator
is not on.
Curve 2
Supply air temperature controlled by the thermostat of the
electric radiator, adjustment value 23
°
C (air flow less than 38
dm3/s
Curve 3
500 W post-heating resistor can heat 50 dm3/s flowing air by
about 8
°
C.
Curve 4
Supply air temperature with water radiator, water +25
°
C and
flow 0.05 dm3/s.
Curve 5
Supply air temperature with water radiator, water +45
°
C and
flow 0.05 dm3/s.
Electric radiator
Example: Warming of outdoor air in the HR cell with electric radiator
Temperature of air going from the unit to the dwelling
HR cell antifreezing starts to function
Temperature of outdoor air coming to the unit
Because heat release of water radiator is dependent on many factors, the
curves are approximate. Glycol decreases radiator power with 10...20
% depending on mixture.
Post-heating
For most of the year, heat recovered from air to be 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 with the radiator delivered with the unit.
Post-heating with electric radiator
VALLOX 75 and VALLOX 95 come standard with a 500 W electric radiator for heating
supply air. The temperature of supply air is adjusted at the thermostat regulator located
inside the unit. Adjustment range of temperature is approxi0...+25
°
C.
It is advisable to set the thermostat at 0
°
C in summer. In this case, the radiator does not
heat air, as the heat recovery cell is bypassed.
Post-heating with water radiator (VKL model)
VKL models come standard with a water radiator (P). Temperature of air going from the
unit is adjusted with the controller of self-actuated thermostat valve (T).
Water radiator defrosting
The defrost thermostat (T) of the post-heating radiator (P) stops the unit when the temperature
of water radiator goes below the threshold value, preventing the risk of freezing in the
water radiator. This also causes self-actuated one-way dampers (Y) to close, preventing
the flow of outdoor air to the unit. The unit starts automatically as soon as the risk of freezing
has passed. The threshold temperature of the risk of freezing can be set at the thermostat
(T).
WARNING!
Though VALLOX 75 / 95 VKL units have an efficient freezing protection for the radiator,
there is always a risk of freezing in the radiator unless non-freezing heat transfer solution
is used. If the unit stops altogether (extract and supply air fan) in winter, the cause must
be defined in order to prevent heat transfer solution (water) from freezing. In winter the
automatic defrost function of the heat recovery cell keeps stopping the supply air fan; this
is normal.
AIR FLOWS 35/30 dm
3
/s
Temperature of outdoor air coming to the unit
The curve is approximate; heating is always dependent
on operating conditions.
Temperature
of extract
air
coming to
the unit
Summary of Contents for 75
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