Carel compactSteam XL, User Manual

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17
ENG
“compactSteam XL” +030222060 - rel. 1.2 - 20.12.2010
installer
user
ser
vic
e
External humidistat with enabling (fi g. 3.r)
Connect the external humidistat between terminals IN-GND. If external
enabling devices are provided for, remove the jumper between terminals
AB-AB and connect the enabling devices in series to terminals AB-AB: air
fl ow switches ( 1), enabling contacts (CR), etc .
Steam production only starts when both contacts, AB-AB and IN-GND,
are closed. If contact AB-AB is open steam production stops immediately,
while if IN-GND is open production stops after 5 s.
Interlock between compactSteam for ducts and the
system fan
In duct applications, compactSteamXL starts steam production only if
there is an external call for humidity (humidistat closed) and the system
fan is on. The system fan communicates with compactSteamXL via the
remote input AB-AB.
The following sequence of events must be true for compactSteam to
produce steam:
• External humidistat close (= steam demand)
• FAN-EXT contact closed by compactSteamXL, to start the system fan
• Input AB-AB closed, indicating that the fan has started (= enable steam
production).
compactSteamXL can be connected to an air fl ow switch (that is, a device
that senses the fl ow of air generated by the fan in the duct). This fl ow
sensor should be connected to the remote enabling input (terminals AB-
AB) in series with a limit humidistat (normally closed).
When the fl ow sensor is connected to compactSteamXL, steam
production is only enabled if air fl ow is sensed inside the duct.
Fan symbol
• Off : no call (IN-GND = open), regardless of whether or not
production is enabled (AB-AB = open or closed);
• Flashing: call present (IN-GND = closed), awaiting
production to be enabled (AB-AB = open);
• On steady: call present (IN-GND = closed) and
production enabled (AB-AB = closed).
Note:
• When enabled (AB-AB = closed), the command to the fan and the
symbol go off 30 s after the production call is no longer present (IN-
GND = open);
• When the production call is present (IN-GND = closed), the
command to the fan and the symbol go off 60 s after production
is disabled (AB-AB = open).
3.6.1 Modulating operation
Connect the external 0 to 10 V modulating control device between
terminals IN-GND as shown in Fig. 3.v. Then connect any enabling
switches (limit humidistat, air fl ow switch, remote on/off ) in series to
terminals AB-AB.
If no enabling devices are used, install a jumper between AB-AB. DO NOT
apply any voltage to AB-AB.
Steam production is modulated from 20% to 100% of the maximum
production, proportionally to the signal provided by the modulating
controller.
3.6.2 Connecting the CLIMA humidistat
The Clima humidistat is used to automatically control the humidity in
the room. The humidistat can enable/disable the humidifi er based on
two time bands (day and night), and can control humidifi cation in two
diff erent modes: proportional control and ON/OFF control.
For the installation and the connection of the Clima device, see the
corresponding instruction sheet, provided inside the packaging with the
humidistat.
REF
OUT
CR
Fig. 3.s
Fig. 3.r
H
CR
(1)