Electronic Control "QRCE" User Manual
firmware 0.27
Rev.09
EN 19/ 23
ENG
(
Heat exchanger defrost management)
0*= Off
Disable
1= Preheating
Electric preheating is ON
2= Modulating fan
It reduces the speed of the supply fan
(password) 1
(set defrost)
Set point defrost
-4.0°C
6.6.
External damper
External dampers are open when the unit is turned On
They are closed when the unit is turned Off
6.7.
Freecooling-heating
Free-cooling is disabled if fresh air temperature is lower than a set point (with an hysteresis).
Free-cooling is active when the fresh air temperature is lower than set point temperature
–
free-cooling differential
and the unit is in cooling mode.
Free-heating is active when the fresh air temperature is higher than set point tempe free-heating differential
and the unit is in heating mode.
6.8.
Heating
Heating is done by a water valve or an electrical heater (depending on plant type).
Heating element
The heating element is activated by set point and a differential value
The water valve is regulated proportionally on the set point
6.9.
Cooling
The cooling element is activated by set point and a differential value
The water valve is regulated proportionally on the set point
6.10.
Supply air limit temperature
When the remote display sensor or return air sensor is enabled as regulation probe, the supply air sensor is used to
avoid too high a temperature during heating or too low during cooling and the valves are closed in proportional way
6.11.
Night mode
Night mode is used to reduce the fans speed during the night in order to reduce the noise level
When the night mode is active the symbol
is blinking.
If the weekly program mode is active, night mode has the priority on fan speed reducing it at value
.
