5 Temspec Leaf IOM Rev 5.docx
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.
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, 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. Temspec 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.
If the risers are shipped loose, the insulation in the riser
inset holes will need to be cut. To do this simply cut an
“X” in the hole to allow the stub-out to enter the unit with
minimal insulation damage. Check that the drain hose is
not kinked before soldering the condensate riser.
Fire stopping the floor opening and making good the riser
insulation of all piping not insulated by the factory is the
responsibility of the contractor.
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 Temspec 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.
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 unless otherwise requested prior to units
released to production.
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 before being filled with water. Do not exceed
300PSI, or max pressure noted on the submittal.
Sustained excess pressures may cause damage to
components, including leaks.
Close the ball valves and flush the riser system.
Check to see if the control valve is in an open position. If
it cannot be locked in an open position the unit will need
to be powered on so the valve can be driven to an open
position to avoid being subjected to a load greater than
its close off pressure. For units with 6 way valves the
process will have to be repeated for both the hot and cold
water systems.
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.
City water is very corrosive to brass components.
Provide water treatment as soon as the system is
charged to avoid premature leaks and/or avoid failure of
internal components.
Drywall Installation
The fan coil model series “TL” or “TR” has a cabinet
which is designed to be furred-in. Drywall can be directly
attached to the cabinet, or the unit can be framed.
Direct Application –The hinged air panel must be used.
It is designed to fit the ½” drywall flange around the return
air / access opening on the unit. Use drywall screws no
longer than 1 ¼” and follow the instructions in Section 16
which shows where the screws can be located to avoid
damaging internal components. Do not attach screws to
the H/ERV module. The sides and back can be framed.
Framing –Frame the unit using metal studs. It is
preferable that the stud does not touch the fan coil
cabinet so that any slight vibration which may exist is not
transferred to the stud.
Before installing the thermostat, return air panel, and
grilles, the walls must be painted. Instruct the painter not
to spray over the labels on the unit. After installation, dust
must be vacuumed from the coil surfaces, the drain pan,
the motor windings, and the cabinet insulation.
Ducted Units
Remove the supply air opening knock-out in the top
panel of the fan coil. Cut out the cabinet insulation
from
the opening and butter the cut edge if it is glass fiber
insulation. Attach the supply air duct.
Note: Supply air duct flanges are not provided by the factory.
