Fan - Zennio MAXinBOX FC 0-10V VALVE User Manual

2.5.3 FAN

The fan speed control of the fan coil module may be manual (the fan speed will be
controlled externally; for instance, by the user) or automatic.
Under the automatic fan speed control, the fan speed will be controlled by the module
itself. This is done according to up to four threshold values (depending on the
number of available fan speeds), set by the integrator. This threshold values define the
range of the ICS that will correspond to each available fan speed. In other words, the
integrator must define which fan speed should be adopted while in the automatic
mode depending on the current value of the ICS. A hysteresis can also be defined,
to prevent continuous fan speed switchovers in case the ICS keeps moving around one
of the threshold values.
The integrator can configure if the user (from a control interface) can switch from one
mode to another or, on the contrary, if only one of the two modes will be available.
When both, the manual and the automatic control modes are permitted, a
communication object will let switching from one control mode to the other, while
the corresponding status object will reflect the current mode.
In addition, the integrator can configure:
Whether the reception of manual fan speed orders while in the automatic
mode should make the fan control switch to manual mode or not.
A period of time so that, in the absence of manual speed orders during
such time, the fan speed control switches to automatic.
Whether the fan speed control should switch to automatic whenever the
heating / cooling mode changes.
Apart from the fan speed control modes, this configuration involves the following
options:
The minimum fan speed permitted in manual mode while the valve is open.
This must be configured for each of the valves. Please note that, to prevent
damage to the installation, speed 0 (fan off) is never available in manual
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MAXinBOX FC 0-10V VALVE
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