BAKL6C502AA.doc
KONVEKTA AG
Edition: 12.07.2001
Page: 9/13
4.2.3. Cooling Operation
The compressor is working in dependence of room temperature.
Compressor ON
100%
2°C above setpoint temperature
Compressor OFF
100%
1°C below setpoint temperature
Both condenser fans are also activated.
In case of switching on the a/c unit, rotational speed of condenser fans is increasing continuously
from 0 - 100% specially by means of starting modules .
If pressure of refrigerant circuit is exceeding 17 bar, condenser fans work with maximum rotational
speed. If pressure drops under 12 bar, rotational speed is reduced to 50% by means of pressure
switch (rotational speed/condenser fan).
NOTE:
Pressure Switch (rotational speed/condenser fan „P„) placed on condenser
Set up
17 bar on
12 bar off
Starting module placed on electric mounting plate inside return air suction.
4.2.4. Heating Process
Digital outlet heating performance:
If heating is required in roof-and floor area, the digital outlet starts to work, in order to open the main
water valve. The digital outlet has a coast down time of 10 minutes maximum. If heating-and cooling
performance is required, outlet „heating performance„ is automatically in operation.
Roof-Heating:
The roof top unit is equipped with a water valve driven with a direct current motor. Depending on
status of the pole, valve will be opened or close. In order to avoid that valve is opened or closed
immediately, controlling works with time cycle.
Valve OPEN -> 1 sec.
Valve CLOSED -> 1 sec.
STOP -> 25 sec.
STOP
-> 2 sec.
Heating Floor:
a)
Heaters equipped with a mixing valve (de-energized open, which means digital outlet ON, valve
closed!) working with time cycle depending on heating performance and a water pump transport-
ing water into heating circuit. The water pump has a coast down time of 10 minutes after the last
heating process.
b)
Underseat-Heater with 2 step collector switch, which is automatically switching to heat perform-
ance (0/1/2) which always starts to work in dependence to the measured floor-area-temperature.
Step 1 on:
approx. 4 K below setpoint temperature
Step 2 on:
approx. 6 K below setpoint temperature
Step 2 off:
approx. 4 K below setpoint temperature
Step 1 on:
approx. 2,5 K below setpoint temperature
