Step 6 Connecting The Water Pipes; Step 7 Performing The Water Leak Test And Insulating The Piping - Samsung AGTN1DKH Series Installation Manual

Step 6 Connecting the water pipes

1 Purge inert gas.
• The fan coil unit comes with nitrogen gas (inert
gas) charged at the factory for protection of the
unit during transportation.
Remove the protective caps from the piping to
purge inert gas.
CAUTION
• To prevent foreign objects from entering the piping,
do not remove the cap until the piping connection is
ready.
2 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.
Step 7 Performing the water leak test
and insulating the piping
1 Perform the water leak test.
• Make sure that there is no water leakage from the
water pipes connected to the fan coil unit.
2 Insulate the pipes.
• After confirming that there is no leakage from the
water inlet and outlet pipes and the drain pipe,
insulate all of them.
• First, insulate the 2 way electric valve before
insulating the water inlet and outlet pipes.
(Covered by the installation site)
• After the valve insulation is completed, insulate the
water inlet and outlet pipes and the drain pipe.
a Choose insulation materials suitable for the pipes.
• Consider the insulation thicknesses suitable for
different pipe diameters.
• The general criterion for choosing insulation
meterials is that it withstands less than 85%
higher than this general condition, choose one
step higher criterion from the following table:
Insulation materials [heating
and cooling (mm)]
Pipe General
Pipe diameter
(mm) (less than
EPDM, NBR
Water
Ø 15.88 19 t
pipes
When installing the piping in locations and
*
environments that meet the following conditions, use
the same insulation for the general condition.
– When humidity inside the ceiling tex is high even if
it is cooled.
– When the room ceiling is high (for example, a large
church chapel, theater, multi-story open lobby,
staircase classroom) and there is a large difference
between the temperatures at the floor and ceiling.
High humidity
Remarks
* *
(more than
Heat
resistance
32 t temperature:
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