12
Installation Procedure
Installation Pr
oc
edur
e
English
CAUTION
• If dust or paint enters the unit, it may degrade the
product performance or cause product malfunction.
Step 5 Purging inert gas from the fan
coil unit
The fan coil unit comes with nitrogen gas (inert gas)
charged at the factory. Therefore, all inert gas must be
purged before connecting the water piping.
Open the sealed tube at the end of the piping. The gas in
the piping comes out.
Water outlet side
Water inlet side
Be sure to check the water inlet and outlet locations.
CAUTION
• To prevent dirt or foreign objects from getting into
the pipes during installation, purge nitrogen gas
(inert gas) immediately before connecting the piping.
• If nitrogen gas (inert gas) is not purged when you
rotate and open the sealed tubes at the end of the
piping, do not install the fan coil unit because it is an
abnormal one.
Step 6 Connecting the water pipes
Connect the pipes.
• Be sure to use a metal pipe for the piping outlet.
• Be careful not to erroneously change the piping
inlet and outlet connections.
(Outlet: air vent valve)
• Be sure to attach a valve to each of the piping
inlet and outlet.
• Be sure to insulate all of the water pipes and the
drain pipe.
• The maximum operating water pressure of the fan
coil is 1.0 MPa. Design your air conditioning system
so that the operating water pressure becomes
1.0 MPa or less.
• Design the piping so that air clogging does not
occur.
• Use Teflon tape on the T-type screws to prevent
water leakage.
DB68-11289A-01_IM_DVM FCU WindFree 4way_EU_EN_.indb 12
2022-04-26 오전 8:55:18