EVCO EPK4BHQ1AH Installer manual - Manual (Page 77)

EVCO S.p.A. c-pro 3 NODE kilo AHU | Application manual ver. 1.0
page 77 of 114
1st heating element
Pb01 x 2
2nd heating element
Set Point - Supply
T. Supply
NZ
Pb03
6.13 Post-heating
This may be performed using a warm water coil (PG01=3) or, alternatively, utilizing electrical heater (PG14>0). The
post-heating serves two main purposes: integration of heat in heating or compensation in the dehumidification phase
in order to realize the amount of heat lost (i.e. drop in temperature) during dehumidification.
The control takes place on the running flow set point and the valve can be commanded using a proportional algorithm
(P), or proportional integral (PI). The referenced sensor is that of the flow temperature.
6.13.1 Post-heating coil for hot water
The third coil is used to regulate the post-heating valve in analogue mode; the control utilizes twice the heating
differential (Pb01).
The activation graph is as follows.
6.13.2 Electrical post heating coil
Based on the number of configured heating elements (PG14=1, 2, 3) double the control differential (Pb01) must be
divided proportionally in order to guarantee uniform Start-up of each single stage of heating element.
Within each insertion/removal of heating elements a certain amount of time (parameter Pb20) must elapse in order to
avoid simultaneous occurrences.
Note: in order to exclusively utilize the heating elements for purposes of post-heating it is important to set PG14>0
and PG01=2.
Set Point - Supply
Pb01
Pb01 x 2
T. Supply
0 %
100
%
NZ
Pb03
Battery for
Heating
Battery for
Post-Heating