Carel humiFog direct DLA02DF000, User Manual

Page: 24 / 48

24
ENG
"humiFog direct" +0300073EN rel. 1.2 - 02.05.2019
Menu Index Description
e. Manual mode
De03 Manual management of zone 1 fill valve FV1, zone 1 drain valve DR1, zone 1 fans, set zone 1 production %
De04 Manual management of zone 2 fill valve FV2, zone 2 drain valve DR2, zone 2 fans, set zone 2 production %
De05 Manual management of unit status contact, alarm relay, cabinet fan, WTS contact
f. Initialisation Df01 Set the screen language
Df02 Change passwords for accessing the menus
Df03 Set the unit of measure (International or Imperial).
Df04 Set the unit model
Df05 Enable USB port reading for unit software update
g. Supervision
Dg01 (visible for single-zone cabinet)
Set the serial address, enable unit on/off and control from supervisor
Dg02 (visible for two-zone cabinet)
Set the serial address, enable unit on/off and control from supervisor
Dg03 Select supervisor protocol
Dg04 BMS supervisor port configuration: baud rate, stop bits, parity
Dg05 Ethernet supervisor port configuration: DHCP, IP address, mask, gateway, DNS. Important - these values must be provided by the
local network administrator
Dg06 BACnet configuration: address, maximum number of masters, maximum number of frames
h. Logout Exit the settings menu: request password on next access
Tab. 6.a
6.2 Control
6.2.1 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.z
The type of control is set on the following screen:
Index Description Parameter
Da01
Da02
Type of control Set the type of control
Default: humidity (one probe)
Options: proportional to external signal,
proportional to external signal with limit
probe, On/Off signal, humidity (one probe),
temperature (one probe), humidity with limit,
temperature with limit, humidity (two probes),
temperature (two probes)
Tab. 6.b
6.2.2 Proportional control to an external signal
(modulating operation)
Atomisation is proportional to the value of an external signal Y, (selectable
from the following options: 0 to 1 Vdc; 0 to 10 Vdc; 2 to 10 Vdc; 0 to 20
mA; 4 to 20 mA). The maximum production Pmax corresponds to the
maximum value of the external signal Y, and will be the humidifier’s rated
production. The activation hysteresis hy is not settable by the user.
P
max
Steam_Pr
P
min
OFF ON
0%
hy 2xhy 100%
Y
Y=
0…1Vdc
0…10Vdc
2…10Vdc
0…20mA
4…20mA
Fig. 6.aa
Key:
Water_pr Pressurised water production Y External signal
P0 Max production hy Activation hysteresis
Pm Min production
6.2.3 Autonomous control with humidity or
temperature probes
When using a main humidity control probe and an optional limit
humidity probe, atomisation is related to the % rH reading made by the
relative humidity probe and increases as the value read deviates from the
set point St. Maximum production Pmax corresponds to the case where
the humidity value, read by the probe, is BP away (proportional band)
from the set point. The activation hysteresis hy is not settable by the user.
P
max
Steam_Pr
P
min
OFF
ON
St
hy
BP
%rH
Fig. 6.ab
Key:
Water_pr Pressurised water production Y External signal
P0 Max production hy Activation hysteresis
Pm Min production