EVCO EPU2BXP1S1 - Manual (Page 51)

EVCO S.p.A. c-pro 3 micro SAVE/ c-pro 3 kilo SAVE | Application Manual ver. 1.0 | Code 144CP3UKSAE104
EVCO
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6.8.3 Fresh air intake damper
It is possible to manage an optional motorised damper (can be enabled by parameter PG04=1) for fresh air intake
purpose. The damper is managed via ON/OFF (digital) activation. The damper can be either fully open or fully closed,
modulation is not possible as well as a minimum opening.
When the fans are requested to start first the damper is opened and, after a delay configured on parameter PS01, the
fans are activated too.
When the fans are switched OFF the damper is kept open for a time configured on parameter PS02.
6.8.3.1 Fresh air intake damper limit switches
In order to have a feedback about the real status of the damper (fully open or fully closed) the digital inputs DI9 and
DI10 are connected to the damper’s “fully open” and “fully closed” limit switches. Every time the damper is requested
to change its status it is verified that both limit switches change their status within the expected time frame (defined
on parameter PS05). If during this time the states of both digital inputs change this means everything is working fine.
If this is not the case the AL06 alarm with manual reset is generated and the unit is brought to the “OFF due to alarm”
status.
6.8.4 Damper mixing room
La serranda viene regolata in base al parametro PS074, e può essere utilizzata per:
- Free-Heating
- Air quality control
- The larger of the 2 requests
- The average of the 3 required
- A fixed value
The adjustment also provides a minimum opening position of the damper to ensure the design minimum quantity
of fresh air (parameter PS08) and the corresponding position of maximum opening (parameter PS09).
If the setting is fixed aperture in the louvre is always the same aperture value decided by the parameter PS10.
If the adjustment is freeHeating, is activated when the temperature difference between the outside air and the
return air temperature reaches the setpoint (parameter PS13) and the response threshold (parameter PS12).
When there are conditions of free-heating, or is there a license to regulation (and the demand is greater than zero)
that controls the ramp heating is split into two flights later, the first one (about half the switching differential) adjusts
the free-heating by means of the damper, the second rule the users in charge of the heating.
T. esterna – T. return
PS12:
PS13:SetFH