Installation, Operation and Maintenance instruction 001

4.2.7 To connect the ducts to the
product
To install the product with circular duct systems, Systemair
recommends to use CCM or CCMI flanged plate.
To install the product in rectangular duct systems, Systemair
recommends to use the flexible connection FGV.
To install the product in rectangular duct systems, obey the
steps below.
1 Put flexible connections on each side of the product and
use self drilling screws with sealing tape in between to
connect the product and the flexible connections. Sys-
temair recommends to use FGV flexible connections to
attach the duct to the product. The flexible connections
are available as an accessory. Refer to13 Accessory
overview page 33.
2 Put the ducts on each side of the product with the at-
tached flexible connections.
3 To connect the flexible connection, use self drilling
screws with sealing tape in between.
4 If you install the product near a duct bend, do these
steps to prevent vibrations, unwanted noise and de-
creased air pressure:
a. Measure the distance (A) between the product and
the duct bend.
b. Make sure that the distance (A) is a minimum of 2.5
x the diameter (B) of the duct system. For circular
ducts, (B) is the nominal diameter. For rectangular
ducts, (B) is the hydraulic diameter.
AA
B
5 Electrical connection
Warning
The MUB/F fan switches off in case of
fire. The MUB/F fan has no motor
protection fitted as standard. Any kind of
motor protection and frequency
converter must be bypassed in case of
fire.
5.1 To do before the electrical
connection
• Make sure that the electrical connection agrees with the
product specification on the motor name plate.
• Make sure that the environment for electrical connection
is clean and dry.
• Make sure that the wiring diagram that is included with the
supply of the product agrees with the terminals in the con-
nection box.
5.2 To connect the product to the
power supply
• Complete the electrical connection for the motor. Refer to
the motor wiring diagram that is included with the product.
• Make sure that the cross section of the protective earthing
is equal to or larger than the cross section of the phase
conductor.
• Install a circuit breaker in the permanent electrical installa-
tion, with a contact opening of a minimum 3 mm at each
pole.
• If a residual current device (RCD) is installed, make sure
that it is an all-current sensitive RCD. Consider if the prod-
uct has a frequency converter, uninterruptible power sup-
ply (UPS), or an EC motor. EC motors have a leakage
current to earth that is <=3.5 mA.
5.3 Speed controller for AC
motors
Note:
The speed controller alternatives are different for different
motor types. Make sure that your motor is compatible with
the speed controller type before you use it.
The speed can be controlled by voltage reduction using a
transformer. It is also possible to control the fan speed with
frequency converter if the installed frequency converter has
built in all-pole sine filter and shielded cables are not needed.
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