Trane Precedent YHJ072A Installation, Operation And Maintenance Manual page 34

Installation
Table 3. TC01 tripping values (continued)
Unit Model
Tons
Number
YHJ210A**(0,A)L
YHJ210A**(0,A)M
17.5
YHJ210A**(0,A)H
YHJ240A**(0,A)L
YHJ240A**(0,A)M
20
YHJ240A**(0,A)H
YHJ300A**(0,A)L
YHJ300A**(0,A)M
25
YHJ300A**(0,A)H
Horizontal Discharge
Conversion (6 to 12.5 Ton Units)
Notes:
• 15 to 25 ton units require purchase of an
accessory kit for conversion.
• 6 to 12.5 ton units move the supply cover to
return opening and return cover to supply
opening.
Supplies Needed by Installer for Conversion: 3 ounce tube
of high temperature RTV sealant (500°F / 260°C, similar to
Dow Corning 736).
Note: 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.
Figure 43. Supply duct cover
4. On original RETURN DUCT COVER, apply ¼"(6 mm.)
continuous bead of 500°F RTV sealant around flange
(opposite insulation side), as shown.
34
TCO1 Tripping Values -
Downflow/Horizontal
140°F-3 inch/150-7 inch
150°F-3 inch/195°F-3 inch
150°F-3 inch/200°F-3 inch
140°F-3 inch/150-7 inch
150°F-3 inch/195°F-3 inch
150°F-3 inch/200°F-3 inch
140°F-3 inch/150-7 inch
150°F-3 inch/195°F-3 inch
150°F-3 inch/200°F-3 inch
Figure 44. Return duct cover
RTV Sealant
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.
Notes:
• If unit is equipped with Return Air Smoke
Detector, refer to field conversion instructions
for horizontal discharge before installing
return air duct.
• If unit is equipped with Discharge Air Sensing
option refer to the following figure for proper
tube positioning based on unit supply duct
orientation / tonnage or refer to literature
ACC-SVN240*-EN for more details.
Figure 45. Supply and return opening
Insulation side up
6. After completing installation of the duct covers for
horizontal discharge, proceed to TCO-1 instructions.
TCO1 Instructions
Note: For complete Gas Heat User information, Operation,
Start-up, Shutdown and Maintenance refer to
Heat Operation and Maintenance," p.
If the unit being installed has a different TCO1 value than
listed in , the limit control TCO1 must be replaced with the
extra limit control shipped in the heater compartment.
Replace TCO1 following the instructions in steps 1 through
3 below. If the unit being installed does not need to replace
TCO1 limit switch, skip steps 1 through 3 and go on to next
step in the installation process.
1. Remove the heat section access panel.
2. Remove TCO1 from shipping location, which is either
attached to the combustion blower motor (6 to 12.5
Supply duct cover
Insulation side
down
Return duct
cover
"Gas
61.
RT-SVX075A-EN