INNOV@-pCO1-IOM-0907-E
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2.3.1 Recovery without cooling devices
As shown in the previous diagram, the recovery coil only is enabled, whereas the conventional cooling
devices are not switched on; as it can be noted in the following diagram, the recovery coil takes up the entire
cold proportional band.
Temperature set
HEATING COOLING
100% 0% 0% 100%
19.5 22.5 23.0 23.5 26.5
3°C
0.5°C
0.5°C
3°C
Ambient
temp. (°C)
Warm proportional band Dead z. Dead z. Cold proportional band
RECOVERY ON-OFF CONTACT
23.0 23.5 26.5
Ambient
temp. (°C)
0-10V RECOVERY VALVE 100%
0%
23.0
23.5
26.5
Ambient
temp. (°C)
2.3.2 Recovery with cooling devices on close contr. units with direct expan.
coil
With recovery coil enabled, the conventional cooling devices are switched on only if ambient temperature
increases above a certain value; adding the effects of recovery coil and devices together, temperature
decreases, but before reaching the set point, the cooling devices are switched off again. In this case, the
cooling devices favour Recovery but do not substitute for it. The following diagram shows how the cooling
devices steps are offset compared to normal position to ensure energy saving.