14
of 53
3
、
、
、
、
Optional components
Control logic
（
（
（
（
P13
）
）
）
）
A) Energy Saving Mode
This mode means that the damper will open and/or close with efficient air temperature, see the
chapter of “control strategy” for detail.
B) Emergency Cooling Mode
It is a different software version choice relative to the energy saving mode. While this function is ena-
bling, the operation of the climate unit is limited to closed loop with the use of free cooling in
emergency situation. Emergency situation is defined an either compressor is fault and or loss of AC
mains.
1
、
、
、
、
Compressor fault
If a compressor fault occurs, the damper is allowed to operate. This means that it will open and close
dependent on the supply temperature and, the ambient temperature and, the return temperature. This
is described in “Graphic illustration”.
The compressor fault timer must have returned to zero before the emergency cooling situation will end.
2
、
、
、
、
Loss of AC mains
The following steps are taken upon loss of AC mains:
The fan curve is offset upwards with respect to the cooling set point. This is to lower the fan speed and
thereby reduce the DC power consumption. The offset can be selected in the range of 0
℃
to 15
℃
.
Default is 0
℃
.
The damper is allowed to operate. This means that it will open and close dependent on the supply
temperature and, to some degree, the return temperature. This is described in “Graphic illustration”.
Mains AC power must be back before the emergency cooling situation will end.
3
、
、
、
、
Recommended usage
This option is only recommendable if the climate unit situated in areas with a high concentration of
humidity, salt, sand or pollution in the air.
Please contact your local dealer or Dantherm Air Handling concerning guide lines for a specific
situation.
Summary of Contents for DCU22-2000DH
Page 51: ...51 of 53 12 Appendix Dimension...
Page 52: ...52 of 53 Wiring diagram...
