FT KT Series - Points to be checked before test running

9
(10) Check that the mortar has not contracted or cracked.
If drain pipes are necessary, provide a drain pit.
(11) When installing a vibration insulating device, fasten the vibration insulating base with the
foundation bolts.
3.6 Precautions for connecting the ducts
Caution
Do not allow the ducts to exert any load on the fan.
Doing so may result in malfunctions, damage or vibration.
(1) Connect the fan’s flanges and ducts using expansion joints to avoid the transmission of
vibration or noise to the exterior.
Particularly when the fluid is hot, ensure to install the expansion joint to protect the fan from
stress of duct caused by thermal expansion.
(2) Before connecting the ducts, check inside the ducts and fan, and remove any foreign matter,
such as waste cloth and tools.
Warning
Be sure to install a protective wire mesh on any open air intakes of
the fan.
(3) To prevent foreign matter from being sucked into, install a protective wire mesh to the duct
inlet or the air intake of fan where air is sucked directly. If dust or water is expected to get
inside the fan, install a filter to protect against it.
(4) If an inactive (not running) fan is exposed to air in the reverse direction, it rotates in reverse.
Avoid exposure to such air because it takes longer to start a fan that is rotating in reverse.
(5) In general, unexpected pressure loss may occur due to the connection to (a) ducts that are
much smaller than the port diameter of the fan, (b) ducts with a series of bends, or (c) ducts
with bends just before or after the connection to the fan.
(6) When connecting the discharge duct to the product that equips a discharge wire mesh as
standard, remove the discharge wire mesh to connect the duct.
(7) If the intake air is swirling, install guide vanes or increase the radius of the bends.
If necessary, take the same precautions in the suction chamber.
If there is a wall in front of the fan suction inlet, secure the clearance between the suction inlet
and the wall equal to or longer than the diameter of the fan suction inlet.
Note