Carel humiFog direct DLA02DF000, User Manual

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16
ENG
"humiFog direct" +0300073EN rel. 1.2 - 02.05.2019
4. ELECTRONIC CONTROLLER SET UP AND CONNECTIONS
After having correctly installed the cabinet and completed the water and
electrical connections, connect the signals used to interface with the
humiFog Direct humidifier to the c.pHC electronic controller (and the
c.pCO controller on two-zone cabinets.
Fig. 4.a
4.1 Remote ON/OFF signal connection
The remote ON/OFF contact is used to enable operation from an external
device. It is a digital contact that can be either open or closed: when the
terminal is open, humiFog cannot operate. The contact refers to inputs 7
[GND]- 8 [digit] on terminal M2 on the c.pHC.
The remote ON/OFF contact must not be confused with the ON/OFF
signal that manages operation, described in paragraph 4.5.
Fig. 4.b
If not intending to use an external contact to start / stop the unit, leave
the terminal short-circuited (as supplied).
4.2 Analogue signal from the main probe
and limit probe in the first zone
humiFog Direct can be controlled using an analogue signal (modulating)
from a main humidity or temperature probe connected to the c.pHC
electronic controller. If connected to a humidity probe, humiFog Direct
will display the relative humidity read by the probe. If connected to a
temperature probe, on the other hand, humiFog Direct will display the
temperature. Based on the probe reading and the deviation from the set
point, humiFog Direct will modulate the humidification load according
to the PWM principle (see paragraph 6.2). The following types of probes
are allowed:
•
4-20 mA, 0-20 mA current probes
•
0-10 V, 0-1 V, 2-10 V voltage probes
The analogue signal from the main probe in the first zone is connected to
the c.pHC controller via inputs 1 [IN a] 2 [GND] 3 [+12 Vdc] on terminal M2.
The limit probe (optional) is used for the auxiliary function to reduce
humiFog Direct humidification or cooling capacity when approaching
a set humidity or temperature threshold (on the display or external
controller). To set the threshold, select operation with limit probe on the
display. The threshold will either be a humidity or temperature value. The
limit probe can also be used without using a main probe.
The following types of probes are allowed:
•
4-20 mA, 0-20 mA current probes
•
0-10 V, 0-1 V, 2-10 V voltage probes
The analogue signal from the limit probe in the first zone is connected to
the c.pHC controller via inputs 5 [IN a] 6 [GND] 3 [+12 Vdc] on terminal M2.
Fig. 4.c
Important: if connecting a probe with voltage signal that requires a
power supply greater than the +12 Vdc supplied to the terminal on the
c.pHC, the third wire must not be connected to input 3 [+12 Vdc] but
rather to terminal GA1 [+24 Vac], made available on the cabinet terminal
block, right above the c.pHC.
4.3 Analogue signal from the main probe
and limit probe in the second zone
If a second zone is used (only with UA%DD201 and UA%DU201 cabinets),
the main probe corresponding to the second zone must be connected to
the c.pCOe expansion installed under the c.pHC controller.
The following types of probes are allowed:
•
4-20 mA, 0-20 mA current probes
•
0-10 V, 0-1 V, 2-10 V voltage probes
The inputs used for the main probe are U1 [IN a] and [GND] on terminal
J2, and the power supply is taken from the +Vdc on terminal J9. The limit
probe (optional) corresponding to the second zone is connected to
inputs U2 [IN a] and [GND] on terminal J2, and the power supply is taken
from the +Vdc on terminal J9.
Fig. 4.d
Important : unlike the first zone, the connection to the c.pCOe expansion
relating to the second zone can supply power to probes that require up
to 21 Vdc.
7 [GND] 8 [digit] REMOTE ON-OFF
[IN a] [GND] [+15 Vdc] [IN a] [GND] [+15 Vdc]
MAIN PROBE
ZONE 1
LIMIT PROBE
ZONE 1
[IN a] [GND] [+15 Vdc] [IN a] [GND] [+15 Vdc]
MAIN PROBE
ZONE 1
LIMIT PROBE
ZONE 1