RT-SVX071A-EN
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installed at the factory for down flow operation with the
TCO1 shipped which is either attached to the
combustion blower motor (6 to 12.5 tons) or to the
installed TCO1 limit switch (15 to 25 tons) for horizontal
operation.
4. Replace heat section access panel.
Figure 46.
TCO1 instrcutions
Location of TCO1 limit
to be installed
Location of TCO1 limit
to be installed
Additional TCO1 limit switch
to be used for horizontal discharge
field conversion
YSJ(072-150)A
YSJ(180-300)A
Note:
The TCO1 switch is attached by 2 screws in the
location shown. The switch has short legs on it so
use caution when sliding out of vestibule face during
removal.
Return Air Smoke Detector
The factory installed Return Air Smoke Detector is installed
in the downflow discharge position for YSJ180-300*
models. No additional field setup is required.
If a unit is to be converted to horizontal discharge for the
YSJ180-300* models, the following conversion must be
performed:
1. If the unit has an economizer, it must be pulled out in
the operating position.
2. Remove the 2 screws from the mounting brackets.
Note:
Refer to downflow view for screw locations of the
YSJ180-300* models.
Figure 47.
Downflow bracket installation (view from
horizontal return duct)
3. Lift the tube and bracket from the downflow duct
opening. Rotate the tube and bracket assembly 90
degrees ensuring that the holes on the aluminium
sensing tube face away from the unit and face the
return air ductwork.
Note:
Refer to horizontal views below of the YSJ180-
300* models.
