Flow-Rate Modulation (Dipswitch 8 And Off ); Series Fl Ow-Rate Modulation (Dipswitch 8 On); Automatic Insuffi Cient Supply Water Management; Automatic Control Of Atomised Water Production - Carel humiSonic Manual Del Usuario

ENG
Production %
P0
Pn
Enable probe TH as humidity limit
When probe TH is connected to the dedicated card input (P/N
UU**R*AS*1), the unit can be controlled via ON/OFF contact (A0=0),
external proportional signal or RS485 (A0=1) or external active probe
(A0=2) and probe TH can be enabled as a humidity limit probe, setting
parameter bH = 1. When approaching the limit set point (parameter SL,
modifi able, default 70% rH) inside the proportional band bL, atomisation
is increasingly modulated, until stopping at the limit set point. The
hysteresis for reactivation of minimum production is fi xed and equal to
10% of the proportional band amplitude bL.
Production %
P0
Pn
6.3 Flow-rate modulation (Dipswitch 8 and
Off )
Atomised water fl ow-rate can be varied from 5% to 100% (parameters Pm
and P0) by alternating on-off cycles of the transducers over a set period
(parameter b7, default 1 second).
Flow-rate is set based on parameter P0 (default 100%) and the request
from the external signal (with optional card and proportional control).
Trasduttore / Transducer
Portata / Flow rate 10%
ON
OFF
Periodo / Period (b7)
Trasduttore / Transducer
Portata / Flow rate 50%
ON
OFF
Periodo / Period (b7)
Direct version for room applic. +0300062IE - rel. 1.3 - 15.07.2019
ON OFF
%rH
10% bP
bP
SP
Fig. 6.e
ON OFF
%rH
10% bL
bL
SL
Fig. 6.f
t
Fig. 6.g
t
Fig. 6.h
Trasduttore / Transducer
Portata / Flow rate 75%
ON
OFF
Periodo / Period (b7)
If the fl ow-rate is 100%, the transducers are always on.
6.4 Series fl ow-rate modulation
(Dipswitch 8 ON)
Atomised water fl ow-rate can be modulated as a percentage of rated
production, from 10% to 100%. Each humidifi er is managed with two
transducer lines (front and rear) and each line generates 50% of total
production. If humidity demand from the external signal (when using the
optional card and proportional control) and parameter P0 are both 100%,
both transducer lines will be activated. For lower demand, production
will be split between the two pairs of transducers as follows:
•
51% - 99%: one pair of transducers is always activated to generate 50%
of required production, while the other pair modulates - as described
in the previous paragraph - to generate the remaining percentage
of production. (e.g. 75% demand: one pair of transducers is always
activated, the other modulates at 50%, as shown in Fig. 6.d)
•
10% - 50%: one pair of transducers is always off , the other modulates
- as described in the previous paragraph - to generate the required
percentage of production. (e.g. 25% demand: one pair of transducers is
always off , the other modulates at 50%, as shown in Fig. 6.d)
Distribution of production between the two pairs of transducers is rotated
every hour of operation, to avoid uneven ageing of the transducers.
6.5 Automatic insuffi cient supply water
management
The humidifi er detects if the water supply is interrupted (or insuffi cient)
by monitoring the status of the level sensor after opening the fi ll solenoid
valve. If the sensor is not activated within the time set for parameter bA
(default in minuts, depending of the size), humidifi cation is interrupted,
the drain is activated and the appliance waits a set number of minutes
(parameter AA, default 10), during which the display shows "Rty" (Retry),
before attempting to fi ll with water again.. If this attempt succeeds,
production will resume, otherwise the appliance waits a further AA
minutes. The process is repeated until the water supply returns, as
measured by the sensor. For the fi rst two attempts, no alarm is generated,
while if on the third attempt the procedure is not successful, alarm EF is
generated, which is reset automatically when the humidifi er verifi es that
the water supply is available again.
6.6 Automatic control of atomised water
production
The humidifi er monitors the water level inside the tank during production
of atomised water. If the level does not fall, it means one of the following
faults may have occurred:
•
Malfunction of the piezoelectric transducers
•
Leaky fi ll solenoid valve
•
Fan malfunction
If after the set time for variable A8 (in minutes, default 30) the water level
does not fall below the low level threshold, atomised water production
stops and the appliance waits a set number of minutes (parameter
AA, default 10), during which the display shows "Rty" (Retry), before
attempting to resume production. If the situation is repeated, alarm EP is
activated, which shuts down the unit.
16
t
Fig. 6.b