Up to approximately 30% of outdoor air inlet opening, operating as a barometric damper. The fans are
enabled at this point and the air is discharged directly outdoors.
Where the return duct connection to the unit is at the bottom, the fans, the barometric damper assembly
and rain protection are installed on the side of the unit.
If the return duct connection to the unit is on the side, the fans, the barometric damper assembly and
rain protection are installed as close to the unit as possible, directly on the front of the return duct. The
fans and the barometric damper are supplied installed on the side panel of the unit.
The rain protection is supplied separately for on-site installation. A cable is supplied for connection of
the fan to the electric box.
2.7 Fixed outdoor air damper
This consists of one damper located at the outdoor air inlet, including the same rain protection and
aluminium mesh filters as in the case of the economiser.
To consult the dimensions, see section
Economiser, modulating, temperature control
, see on page 43
The damper has a manual opening device and mechanical fixing to ensure its position once the correct
percentage of outdoor air in the installation is achieved, always in accordance with the unit operating
limits.
The damper is supplied installed on the side panel of the unit. The rain protection is supplied separately
for on-site installation.
2.8 Low temperature control (low ambient)
This option is included in the "Premium Kit".
Rooftop units are designed to work in cold mode to a minimum outdoor temperature of 7 °C or 10 °C.
With this option, they can operate correctly to a minimum outdoor temperature of ‑18 °C.
2.9 Air filters F6 and F7
These are high-performance air filters (according to Standard EN-779). The unit is fitted with guides for
their installation behind the standard filters G4, in line with the requirements of the strictest regulations
on indoor air quality in buildings.
They have a galvanised steel frame and minipleat-type filtering.
2.10 Dirty filter pressure switches
These provide a dry contact when the air filters are blocked to indicate that maintenance or replacement
is required. The filter icon is indicated on the display connected to the thermostat DPC-1.
2.11 Smoke detector
The detector is fitted in the return air area of the unit. If particles of smoke are detected, the unit stops
and switches to "lock out" mode, in which case it must be manually reset before it can be restarted.
A T T E N T I O N
The smoke detector is fitted to protect the unit. It must not be used as a protection system for the building
or other facilities. Its use is subject to compliance with local regulations involving unit installation (relating
to ventilation systems, fire prevention, etc.).
Depending on the regulations involving the unit, this option may require the use of an economiser or
motorised damper.
2
Options and accessories
2.7
Fixed outdoor air damper
46
