Download c-pro 3 hecto MCSA

EVCO S.p.A.
5.2.4
c-pro 3 hecto MCSA | User manual ver. 2.0 | Code 144MCSAE204
Flow work set-point
point
The regulation set-point
point can be fixed or linked to a linear calculation on the temperature measurement of the external
air.
If the external air temperature probe is enabled and operating, then the regulation set-point
set point is calculated according
acco
to
a climatic curve.
If the external air temperature probe is not present or broken, then the regulation set-point
set point is fixed; it is established
via a relevant maintenance level parameter.
The set-point
point calculation climatic curve envisions setting two pairs of External Temperature - Set-point values.
These two pairs determine a minimum and maximum value of the set-point
set point depending on the external temperature, as
per figure.
points differ for Summer or Winter mode, separating
separating the valve operation in the two
The two climatic curves and set-points
seasons.
5.2.5
Dew point control
During SUMMER operating mode, the mixing valve work set-point
set point will be monitored continuously and, if necessary,
modified for the dew point control.
The dew point is the temperature at which a mass of air must be cooled at constant pressure, until it is saturated (i.e.
when the percentage of water vapour reaches 100%) and therefore can start to condensate if it should lose further
heat.
This would lead to the formation of dew on the cooled surface, thus compromising the integrity of the controlled
environment.
The dew point is calculated on the basis of the temperature
temp
and humidity of the zone 1.
To consider the construction features of the system,
syst
the dew point will be calibrated by a pre-defined
pre
offset that can
be set by parameter.
The mixing valve regulation set-point
point (or of the flow line) will be limited to the minimum value given by the "flow dew
point + offset" calculated, whenever necessary.
If enabled, the lock alarm
arm parameter for high and/or low temperature, after a delay set by parameter, will be disabled
all the loads.
page 33 of 52