Installation
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5
IM 1272 • OPTILINE VERTICAL FAN COILS
Installation
Installation of Units with Risers Attached
WARNING
Use solder to connect the risers. Do not use Silfos (brazing) as this will
cause the pipe to overheat and the insulation to be damaged.
NOTICE
Daikin does not advise on the location or method of anchoring as this is
the responsibility of the engineering company retained to design the riser
system.
CAUTION
Sharp edges and coil surfaces are a potential injury hazard. Avoid contact
with them.
A rectangular opening is made in the floor slab, usually
sleeved before pouring the floor. Refer to the catalog or
submittals for sizes.
Rotate the unit from the horizontal position to vertical so that
the bottom end of the risers insert into the expanded end of the
risers on the unit below. 2" is allowed in the riser length for the
depth of the insertion. Shim the unit plumb.
Before making the solder joint, ensure that the run outs
from the supply and return risers are centered in the slots in
the cabinet. If this is not done there is considerable risk of
distorting the run out when the hot water riser expands causing
the run out to contact the edge of the slot in the sheet metal
potentially causing failures or leaks. Also ensure that the
condensate riser stub out is at 90° to the cabinet so that the
drain hose is not kinked.
Connect the risers by soldering (not brazing) using 95/5
solder. An additional cap of 50/50 solder can be added for
extra strength.
Ensure that the horizontal run-out from each riser is centered
in the slot in the cabinet and that the run-out from the riser
is at 90º as it enters the cabinet, prior to soldering the risers.
Anchoring the risers to the floor slabs is the responsibility
of the contractor. Shim the unit plumb. It is not necessary to
use a pad under the unit. Fire stopping the floor opening and
making good the riser insulation at the floor opening is the
responsibility of the contractor. Check that the drain hose is
not kinked before soldering the condensate riser. If the risers
incorporate expansion compensation loops, remove the
support brackets after anchoring the risers.
The fan coil unit has unions at the shut off valves. These
fittings must be checked prior to pressure testing the system by
the contractor as part of the installation procedure. Mechanical
fittings can loosen during transportation and handling. If
contractor /installer deem it necessary to tighten mechanical
fittings Daikin does not assume any responsibility for this
procedure. It is stressed that the component manufacturer’s
recommended procedures be strictly followed.
The coil is pressure tested hydrostatically at the factory using
a propylene glycol solution. Trace amounts of this solution are
allowed to remain in the coil to ensure that the coil does not
freeze during transportation. After testing on site with water the
fan coil unit must not be exposed to freezing temperatures.
Riser anchoring is required for two purposes. The risers are
anchored to the floor slab at one or more points in the height
of the building so that they do not slip down under gravity.
The second reason is to spread the expansion in opposite
directions from the anchor point. Typically risers will be
anchored at the midpoint of the height of the building. If there
are riser expansion loops included in the risers inside the unit,
the anchor point will be at the midpoint between two sets of
loops. For example in a 16 story building there will be a loop
on the hot water riser on floor 8 and anchors at floors 4 and 12.
After anchoring, the risers are in effect attached to the building
structure so it does not matter if the plastic straps holding the
risers to the unit break off after installation.
• Complete the riser insulation at the solder joint is the
responsibility of the contractor
•
Fire stop the floor opening in accordance with code
Flushing and Testing
The fan coil is normally equipped with ball type shut off valves.
The unit is shipped with the ball valves open to the coil.
After checking mechanical fittings inside the unit for tightness,
it is recommended that the units on each riser stack are
pressure tested using compressed air or nitrogen.
•
Close the ball valves and flush the riser system
• Open the supply side ball valve and bleed air from the
coils. The coil has a manual air vent for this purpose.
The top of each riser should also have an air vent (not
provided by the factory)
• Test the units and risers hydrostatically. Open the return
side ball valve after testing
• Check that the strainer mesh is not choked, if there are
strainers included with the unit
