EVCO EPK4BHQ1AH Installer manual - Manual (Page 80)

EVCO S.p.A. c-pro 3 NODE kilo AHU | Application manual ver. 1.0
page 80 of 114
6.14.2 Limit regulation of dehumidification
When there is an active request for dehumidification and there is a pending request for continuous heating, this
function (enabled by parameter PU05=1) allows for limiting the cooling valve opening to dehumidify in order to
contrast the continuous decrease in temperature (required by the dehumidification) and rapidly returning to the
desired conditions in temperature.
This action has a more immediate effect on temperature and allows for energy savings, optimizing coil control.
When the dehumidification request is active the action limit’s objective will be to limit the dehumidification in order to
prevent continuously cooling the air (caused by dehumidification) and, as a result, to always request more heat to the
heating (and post-heating) coils. This action optimizes the control resulting also in energy savings.
Note: if the discharge air temperature sensor is in error this control cannot be utilized.
Example 1
Dehumidification request = 80%
Dehumidification limitation = 50%
In this condition the request for dehumidification to the coils will be 40% which is 50% of the 80% of the effective
request.
Example 2
Dehumidification request = 80%
Dehumidification limitation = 25%
In this condition the request for dehumidification to the coils will be 20% which is 25% of the 80% of the effective
request.
Set Point - Supply
Pb01
Pb01 x 2
T. Supply
0 %
100
%
NZ
Pb03
Heating
battery
Re-Heating
battery
Limited action on
cooling battery for
dehumidification
No
limitation
Maximum
limitation