Installation
20
RT-SVX38C-EN
If any of the units listed in the previous note are installed
in the down flow discharge configuration, remove and
discard the additional TCO1 limit switch from the
combustion blower motor.
Horizontal Discharge Conversion
(5 Ton Units)
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. Locate supply cover. Apply ¼ inch (6mm) continuous
bead of 500°F RTV sealant to the flange as shown.
3. Position duct cover as shown and rotate 90 degrees to
allow entrance into supply opening.
4. Slide duct covers into duct openings until inward edge
of duct cover engages with the 2 retaining clips on the
duct flanges. Secure the outward edge of each duct
cover with 2 screws.
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.
6. After completing installation of the duct covers for
horizontal discharge, proceed to TCO-1 instructions.
TCO1 Instructions–Unit Model Number
YSC060ED*H
If the unit being installed is YSC060ED*H, the limit control
TCO1 must be replaced with the extra limit control shipped
in the heater compartment. Replace TCO1 using steps 1
through 3 of the following instructions. If the unit being
installed is not YSC060ED*H, skip steps 1 through 3 and go
to the next step in the installation process.
1.
Remove the heat section access panel.
2. Remove TCO1 from shipping location, attached to the
combustion blower.
3. Replace and discard the existing TCO1 originally
installed at the factory for downflow operation with the
TCO1, which was shipped attached to the combustion
blower for horizontal operation.
4. Replace heat section access panel.
Table 3.
TC01 tripping values
Unit Model
(Standard Efficiency)
TCO1 Tripping Values
Downflow/ Horizontal
YSC060ED*L
170F
YSC060ED*H
170F/200F
YSC072ED*L
200F
YSC072E*H
180F/220F
YSC090ED*L
200F
YSC090ED*H
180F/220F
YSC102ED*L
200F
YSC102ED*H
190F/260F
YSC120ED*L
200F
YSC120ED*H
190F/260F
Figure 18.
Duct cover
RTV Sealant
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.
Location of TCO1 limit for the
Y(S/H)C036E, YHC037E, YSC048E,
and YSC060E units
Flame
rollout
limit
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