12.2.4 - Units with fans with available pressure
(Option 12)
12.2.4.1 - General information
The machine must be installed outdoors. Installation indoors is
forbidden.
Each fan is controlled by a speed regulator. Therefore each circuit
operates independently and must have a separate duct system
to avoid any air recycling between the condensers of the dierent
refrigerant circuits.
On the 30RB/RQ units, each fan includes a factory-mounted
connection frame interface for the connection to the duct network
of the specic refrigerant circuit to which the fan belongs.
For the precise dimensions of this connection interface please
refer to the dimensional drawings for the units.
Fan discharge connection
A square ange is supplied mounted on the unit. An available
standard round ange can easily be installed at the fan discharge,
if the installer prefers the use of a round connection duct.
The unit is supplied with a grille on the discharge side. This grille
has to be removed before connection to the duct system.
It is advisable to make the connection to the duct system with a
exible sleeve. If this recommendation is not observed, a lot of
vibration and noise may be transmitted to the building structure.
Unit with grille protection option
NOTE: The discharge lines must be ducted separately.
B
Fan motor access hatches (700 x 700 mm hatch) for each single and dual duct
C
Connection bellows or sleeve
IMPORTANT: The connection of the ducts to the units must
not lead to a mechanical constraint on the decks supporting
the fans. Use bellows or exible sleeves to connect the ducts.
At the beginning of each duct, provide an access hatch with
minimum dimensions of 700 x 700 mm to allow replacement
of the motor or removal of the fan scroll.
12.2.4.2 - Fan motor electrical protection
Each motor is controlled by its own variable-speed controller.
Electrical protection is ensured by the variable-speed controller
(in case of a locked rotor or overload).
If a fan does not operate, the speed regulator will automatically
detect this and an alert will be sent to the SmartVu
TM
display. Refer
to the control manual for the list of alarms specic to this option.
12 - OPTIONS
41
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