![background image](http://html1.mh-extra.com/html/carrier/50fc-020/50fc-020_installation-operation-and-maintenance-instructions_2561554010.webp)
10
6 - OPERATION LIMITS
7 - POSITIONING AND INSTALLATION
7.1 - Storage
Important: It is prohibited to store and install the machine in an
explosive atmosphere zone (ATEX).
If it is necessary to store the unit for a period of time before its
installation, the following recommendations should be followed:
■
Do not remove the protective packaging and the transport
supports. The unit packed with plastic protective
fi
lm should not
remain exposed to the sun for long, as prolonged exposure of
the protective
fi
lm can deteriorate the unit’s paint.
■
Store the unit on a
fl
at and horizontal surface.
■
It is highly recommended to store the unit in a dry place and
protected from the weather.
■
Supplied accessories must be stored in a dry and clean place
for future unit assembly.
■
The unit should always be stored under the following
environmental conditions:
- Minimum ambient temperature: -30°C
- Maximum ambient temperature: 50°C
- Maximum relative humidity: 95% (to avoid condensation).
7.2 - Choice of location
When choosing the location, whatever may be the selected fashion,
the following precautions have to be taken into consideration:
■
It is mandatory to comply with norm EN 378-3 on Safety and
Environmental Requirements
■
Important: In units with R-454B refrigerant consult the “Rooftop
A2L Installation guide” (Nb. 10714), which includes a set of
recommendations for choosing the most suitable site. It is the
customer’s responsibility to carry out the risk analysis of the
installation.
■
. Part 3: “In situ” installation and protection to people.
■
Important: The unit performance is not guaranteed in case of
installation at an altitude of more than 1000 meters.
■
It is necessary to check that the structure supports the unit’s
weigh (please consult the weight in section 7.6).
■
The area where the unit will be located must be perfectly
accessible for cleaning and maintenance operations (please
consult the “Recommended service clearance” in section 7.7).
■
Since the unit is designed to work outdoors, some speci
fi
c
installation norms must be followed:
- The unit will be located on the roof of the premises. If it is
foreseen that it will work more on heating than on cooling, it
is preferable to direct the coil towards the sun. If little work
on heating is foreseen, choose North direction.
- Avoid placing obstacles in the air supply or return. No obstacle
may impede the air aspiration into the coils. Do not
fi
x the
outdoor coil side in the predominant wind direction.
- Do not install the unit in a closed enclosure or in conditions
that originate air recirculation.
- The chosen location must not
fl
ood and must be above the
average height the snow reaches in that region.
(1) With a condensation pressure control disabled operation up to
+12ºC.
(2) When the outdoor temperature is usually below 5ºC WB, the
installation of a support element is recommended.
Inlet air conditions
Cooling
Heating
50FF
50FC
50FC
Indoor coil
Minimum temperature
9,7ºC WB
10ºC
Maximum temperature
24ºC WB
27ºC
Outdoor coil
Minimum temperature
-10ºC (1)
-15ºC WB (2)
Maximum temperature 52ºC
48ºC
15ºC WB
Positioning of ATEX zones around the unit
In units with refrigerant R-454B, due to the nature of this refrigerant
(A2L
fl
uid), ATEX zones have been identi
fi
ed and positioned
around the units, as shown in the diagram opposite.
The ATEX zones, as de
fi
ned, must only be entered by suitably
trained personnel equipped with the appropriate detection
material and tools for working in an ATEX zone.
ATEX zone 2 is involved.
These units are designed to be installed outdoors, in a free
fi
eld-
type, well ventilated area.
In the ATEX zones, the presence of ignition sources (electrical
power source, mobile phone, or any other heat source) is
prohibited, even temporarily. They also cannot be installed in or
near the duct network of the unit.
In these zones, the installation of fresh air vents or extractors of
the building is also prohibited.
0,6m
0,6m
0,6m
0,6m
0,6m
0,6m
0,6m
0,6m
50FC 020 - 047
50FC 052 - 093
Summary of Contents for 50FC 020
Page 79: ......