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Figure 19. TCO1 instructions
YZJ(150-300)***(0,A) (12.5 to 25 Ton Units)
Note: The TCO1 switch is attached by two 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 12.5 to 25 ton units. No
additional field setup is required.
If a unit is to be converted to horizontal discharge, for 12.5
to 25 ton units, 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 two screws from the mounting brackets.
Note: Refer to downflow view for screw locations of
12.5 to 25 ton units.
RT-SVX077B-EN
Additional TCO1 limit switch
to be used for horizontal discharge
field conversion
Location of TCO1 limit
to be installed
Figure 20. 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 and confirm the holes on the aluminium
sensing tube face away from the unit and face the
return air ductwork.
Installation
25
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