37
12.7 - Electrical heaters
■
The auxiliary electrical heaters are ready for operation in two
power stages. This heaters are managed by the electronic
control of the unit that can activate them in the following cases:
- As a backup in HEATING mode, following the input of all the
available compressors.
- In HEATING mode, instead of compressors.
- During the defrosting operation if selected as support.
- As a backup in COOLING mode in accordance with the return
and supply temperatures.
■
Up to 3 values of total power available for each model:
12 - FACTORY OPTIONS AND ACCESSORIES
■
The electrical heaters are assembled and connected inside
the unit. They can be accessed by the same panel that the
supply fan.
1
3
2
■
To remove the frame(s) with the electrical heaters it is necessary
to disconnect the wires from the connection box and unscrew
the frame(s) attachment screw (M4 Allen).
■
Each frame incorporates safety thermistors for protection of the
unit against excess temperature. One of them has automatic
reset (AR) and tare value at 65ºC, the other one has manual
reset (MR) and tare value at 120ºC. To rearm the manual
thermistor it is necessary to remove the upper rail,
fi
xed with
two 4.8 self-tapping hex screws.
Tab
Note: the stop-drop in the indoor
coil is not compatible with the hot
water coil.
50FF/FC
RAF (Low)
RAM (Nominal)
RAS (High)
100 to 120
27 kW
36 kW
54 kW
130 to 170
36 kW
54 kW
72 kW
180 to 220
45 kW
72 kW
90 kW
250 to 280
54 kW
72 kW
108 kW
12.6 - Stop-drop in the indoor coil
■
The stop-drop can be installed in the indoor coil. It’s
recommended in cases where a high moisture content in the
air is foreseen or when the air
fl
ow is high.
■
The stop-drop is accessed by that same panels of electrical
heaters, since it is placed between the indoor coil and the
electrical heaters (see previous image).
It’s accessed by removing the panels (1) and (2), and then the
inside panel (3).
■
The stop-drop frames are easily removable. They can be moved
by rail by lifting the tab.
These heaters are accessed by removing the panels (1) and
(2), and then the inside panel (3), all of them
fi
xed with M6
Allen screws.
Screws
fi
xing the frames
of the electrical heaters
Screws
fi
the rail of the
thermistors
MR (120ºC)
AR (65ºC)
MR (120ºC)
AR (65ºC)
Summary of Contents for 50FC Series
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