12
8 - SAFETY ELEMENTS
Clogged fi lter detector (optional)
Diff erential pressostat for indication, through an automatic
reset alarm, of a level of dirtiness of the fi lters greater than the
established level.
Automatic reset.
Pressure reading is done thanks
to two intakes within the air
fl ow before and after the fi lter,
such that a comparison is made
between the pressure of the
inlet air to the fi lter (positive) and
the outlet air of the same to the
other side of the evaporating coil
(negative).
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+
Main door switch
By using a mechanical
device, it impedes access to
the electric panel when the
unit is with voltage.
Control of air fl ow (optional)
- For those units with centrifugal supply fans (standard),
a diff erential pressostat can be incorporated in order to
measure the variation in air fl ow. This pressostat allows
the detection of fan belt breakages, since the fan relay only
detects operating faults that have arisen in the motor. This
safety device is included in units with electrical heaters. This
pressostat is installed in the factory in the auxiliary electric
panel of the indoor unit.
- The supply plug-fans (optional) adapt their speed to the
average fl ow measured by the diff erential pressure sensor
and the value set as a setpoint in the electronic control.
9 - OPTIONS
The installation of some of these options brings in
pressure drops at air level therefore this must be
considered when selecting fans. the pressure drop
graphs in the options, can be seen in the technical
brochure.
9.1 Mixing box
In models 90 to 360 of the 40ZS/ZF unit the mixing box is a
separate module. The link between them is made with the M8
screws and rivet nuts provided from factory.
M8 screw
Rivet nut
Mixing box
Smoke detecting probe
Smoke detector (optional)
In accordance with standard NF S
61-961, this smoke detection station
uses a LED to indicate the installation
status, and if the probe detects the
presence of smoke in the installation,
it stops the operation of the unit.
Note:
all available assemblies indoor units with mixing boxes
can be found in Chapter 3.
Note:
the electrical connection of the mixing box (MS or MC) is
performed from the electric cabiner to the condensing unit.
In the case of connection with a condensing unit 38ZS/ZF, the
instruction manual of this outdoor unit should be consulted
(No.10258), since the electrical connection of both units is
explained there.
Refrigerant leak detector (optional)
The gas detector sensor is a device that signals leaks in
refrigerant. When the loss of a certain concentration is detected,
the sensor sends the alarm to the control, which stops the unit
and locally activates a acoustic and visual signal.
This off ers the advantage of acting immediately to gas leaks,
guaranteeing the safety of persons who are in the proximity
thereof. Its installation complies with European regulations
F-GAS, EN378, and ASHRAE 15.
This sensor is installed next to the supply fan. In case of alarm,
it is reset manually.