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Installation
11RT-SVX19A-E4RT-SVX19A-E4
Connection of duct
network
1) Downflow discharge units
(TKD,WKD,YKD)
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
(TKH,WKH,YKH)
• 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 TKH, WKH or
YKH 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 6 - Condensate Drain location
1 = Condensate drain connection
A = TKH/YKH 155, 175, 200, 250 - WKH 125,155, 200
B = TKD/YKD 155, 175, 200, 250 - WKD 125,155,200