Installation
RT-SVX38B-EN
21
TCO-1 Instructions
If the unit being installed is listed in the following list, the
limit control TCO1 must be replaced with the extra limit
control shipped in the heater compartment. ReplaceTCO1
following the instructions in steps 1through 3 below. If the
unit being installed does not correspond to any in the
following list, skip steps1 through 3 and go on to next step
in the installation process.
Unit Model Number
YSC060ED*H
1.
Remove the heat section access panel.
2. RemoveTCO1 from shipping location, attached to the
combustion blower.
3. Replace and discard the existing TCO1 originally
installed at the factory for down flow operation with
the TCO1 shipped attached to the combustion blower
for horizontal operation.
4. Replace heat section access panel.
Horizontal Discharge Conversion
(6 Through 10 Ton Units)
Note:
6 - 10 ton units the supply cover to return opening
& return cover to supply opening.
Supplies Needed by Installer for Conversion: 3 oz. tube of
high Temperature RTV sealant (500°F / 260°C: Similar to
Dow Corning 736).
Important:
Failure to use recommended sealant could
result in unit performance loss.
If a unit is to be converted to a Horizontal discharge, the
following conversion must be performed:
1.
Remove RETURN and SUPPLY duct covers.
2. Place SUPPLY DUCT COVER over down-flow return
opening. (insulation side down)
3. Using self-drilling screws, (or screws removed from
duct cover), screw through dimples to attach DUCT
COVER to base.
4. On original RETURN DUCT COVER, apply ¼”(6mm.)
continuous bead of 500°F RTV sealant around flange
(opposite insulation side), as shown.
5. Slide RETURN DUCT COVER (insulation side up) into
supply opening until inward edge of duct cover
engages with the 2 retaining clips on the duct flange.
Secure outward edge of the duct cover with two
screws.
Note:
If unit is equipped with Return Air Smoke Detector,
refer to field conversion instructions for horizontal
discharge before installing return air duct.
Note:
If unit is equipped with Discharge Air Sensing
option refer to the following figure for proper tube
positioning based on unit tonnage.
6. After completing installation of the duct covers for
horizontal discharge, proceed to TCO-1 instructions.
Figure 19. TCO1 location (YSC060ED*H)
WARNING
Hazardous Voltage!
Disconnect all electric power, including remote
disconnects before servicing. Follow proper lockout/
tagout procedures to ensure the power can not be
inadvertently energized. Failure to disconnect power
before servicing could result in death or serious injury.
FLAME
FLAME
ROLLOUT
ROLLOUT
LIMIT
LIMIT
LOCATION OF TCO1 LIMIT
LOCATION OF TCO1 LIMIT
FOR THE Y(S/H)C036E, YHC037E,
FOR THE Y(S/H)C036E, YHC037E,
YSC048E, AND YSC060E UNITS
YSC048E, AND YSC060E UNITS
Figure 20.
Duct cover
Figure 21.
Duct cover
Figure 22.
Supply and return covers
Supply Duct Cover
Screw into 4
dimples on top
edge
RTV Sealant
Insulation side
down
Supply duct cover
Insulation side up
Return duct
cover
