Installation
RT-SVX20A-E410
Installing the unit on the ground
To install the unit on the ground, its
base must be level and supported
securely. For horizontal discharge
units, a support is required such as
a metal or concrete slab whose
height must be determined
according to the amount of snow
cover, to prevent problems with
condensation drainage and
obstruction of the external coil. If
necessary use an anti-vibration
material between the rooftop unit's
base and the support.
Note: Unit installation must comply
to local codes
Connection of ductnetwork
1) Downflow discharge units
(TSD,WSD,YSD)
Using the rooftop curb
• The rooftop curb must be
insulated on the outside walls at
the discharge and intake
openings to prevent
condensation in the ducts.
• The rims around the discharge
and intake openings make it
possible to attach the flanges on
the ends of the ducts. If you are
using rigid duct ends
recommended on the rooftop
curb plan, it is essential to fix
these components before
installing the unit.
• For the design of the duct
network, comply with
recommendations currently
applicable on the market, in
particular:
. Installation of a section of
flexible ducts to limit
transmission of the unit's
vibrations
. Use of movable vanes or
deflectors to reduce the sound
level.
2) Horizontal discharge units
(TSH,WSH,YSH)
• The intake and discharge ducts
must be insulated (thermal
insulation).
• The duct section located outside
must be leak-tight.
• Provide a flexible connector to
prevent transmission of the unit
vibrations. This flexible duct
must be installed inside the
building.
Note: In case of use of units with
economizer option, temperature
and humidity sensors must be
installed in return duct.
Economizer linkage is factory
mounted but the damper position
must be adjusted on site.
Figure 7 - Unit installation on the ground
1 = Concrete slab