Pre-Installation
UNT-SVX041D-EN
11
Contractor’s Responsibilities
Unless otherwise requested by the customer at the time of
shop drawing approval, the cabinet insulation is cut for
supply air openings.
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.
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 90 degrees 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 expansion compensation loops
were added to the risers, remove the support brackets after
anchoring the risers.
The fan coil unit has a threaded connection at the shut off
valves. These connections must be tightened prior to
pressure testing the system by the contractor as part of the
installation procedure. Mechanical fittings can loosen
during transportation and handling.
The coil is leak and proof tested at the factory.
Two-way Control Valves
When two way valves are used, pump and chiller bypass
or pump speed control must be included in the system.
This is necessary to ensure that the close-off pressure
rating of the valve is not exceeded. The maximum close-
off pressure rating is given in the submittals.
Accessories
Do not install grilles or thermostats until after the walls
have been painted. Caution the painter against spraying
over the labels on the front cover of the unit.
NOTICE
Equipment Damage!
Failure to follow instructions below could result in
distortion of equipment.
Ensure the horizontal run-out from each riser is
centered in the cabinet slot and at 90 degrees as it
enters the cabinet prior to soldering the risers.
NOTICE
Improper Operation!
Failure to follow instructions below could result in
improper operation of equipment.
Ensure the drain hose is not kinked before soldering the
riser.If risers have expansion compensation loops,
remove support brackets after anchoring risers.
NOTICE
Coil Freeze-up!
Failure to follow instructions below could result in coil
damage. After testing on site with water, the fan coil
unit must not be exposed to temperatures at or below
freezing. The interior of the unit must be vacuumed
clean before the unit is started up. This includes drain
pan and the fan motor windings.
