Carel humiFog direct, User Manual

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24
ENG
"humiFog direct" +0300073EN rel. 1.0 - 31.03.2017
P
max
Steam_Pr
P
min
OFF
ON
St
hy
BP
%rH
Fig. 6.c
Key:
Water_pr Pressurised water production Y External signal
P0 Max production hy Activation hysteresis
Pm Min production
When using a main temperature control probe and an optional limit
temperature probe, atomisation is related to the temperature reading in
°C or °F made by the probe and increases as the value read deviates from
the set point St. Maximum production Pmax corresponds to the case
where the temperature value, read by the probe, is BP away (proportional
band) from the set point. The activation hysteresis hy is not settable by
the user.
Fig. 6.d
Key:
Water_pr Pressurised water production Y External signal
P0 Max production hy Activation hysteresis
Pm Min production
For “humidity (one probe)” or “temperature (one probe)” control, one
single main probe can be connected and configured, either wired or
wireless.
For “humidity with limit” or “temperature with limit” control, a wired
probe can be connected as the main probe and a wired probe as the
limit. If using wireless probes (maximum of four), two groups of probes
can be defined: the group of main probes and the group of limit probes.
In this case, the average will be calculated between the main probes,
depending on the defined weight, and the limit probes will also have
their own average, again depending on the defined weight.
For “humidity (two probes)“ or “temperature (two probes)” control, only a
group of main probes can be defined. Wired probes can be connected to
the main probe input (M2.1) and the limit probe input (M2.5), which will
be used as a second probe, with the average calculated. If using wireless
probes (maximum of four), only a group of main probes can be defined,
with the average calculated, depending on the defined weight.
For the connections of the signals and/or probes, see chap. 4.
6.4.1 Weighted average of the probes (installer
menu)
If using two temperature probes or two humidity probes, the humidifier
controller will calculate the weighted average of the probe readings.
In this way, two probes can be used, for example humidity probes, at
opposite ends of the room, calculating the average.
Index Description Parameter
Ea02
Weight of the
probes Set the weight of the probes
Default: 100
Possible settings: 0 to 100
Step: 1
The weight of each probe should be expressed with a value from 0 to
100.
The weighted average is calculated as follows:
Weighted average = ((S1×p1)+(S2×p2))
----------------------------
(p1+p2)
where “Si” is the probe reading, and “pi” the relative weight.
To calculate the arithmetic average, equal weights should be set (for
example: p1 = p2 = 100).
6.5 Modulation of production
The system modulates the atomisation of water intermittently, in PWM
mode (pulse width modulation). Within a time period of 120 seconds
(settable value), the unit will deliver pressurised water to the blower
units for atomisation by the nozzles in the room:
•
for 120 seconds continuously, when there is maximum production
request;
•
for a fraction of time Ton less than 120 seconds (minimum 8% of the
entire period) and proportional to the request signal, if not at the
maximum.
When atomisation stops, the pump remains active and the water is
recirculated through an internal bypass circuit in the pumping unit,
rather than being delivered to the blower units.
Fig. 6.e