Trane YSC060 Installation Operation & Maintenance page 20

Through the Base Gas Installation
To convert the unit to through the base gas, complete the
following procedure. The gas supply line must extend 120
mm (4-5/8 in) above the base-pan. The parts listed in the
procedure are all field-supplied, and need to be purchased
separately in order to make this conversion. All joints in the
assembly should be made using a pipe sealant approved
for gas applications.
Note:
All field-installed gas piping must comply with
applicable state and local codes.
1. Remove the insulation and metal plug from the through
the base gas penetration. Route the gas supply pipe so
that it extends 120 mm (4-5/8 in) above the base pan.
2. Remove the plastic plug from the upper hole in the center
post. Insert a grommet (similar to the one located at the
bottom of the center post) in place of the plastic plug.
3. Using pipe sealant attach a 90° street elbow to the outlet
side of the gas shut-off valve and a 165 mm (6-1/2 inch)
pipe nipple to the inlet side.
4. Using pipe sealant, attach a 90° elbow to the gas supply
line that has been routed through the base.
5. Install 2 grommets in the pipe access holes in the center
post.
6. Install the gas shut-off valve/nipple assembly through the
upper grommet in the center post.
7. Using pipe sealant, attach the 165 mm (6-1/2 in) pipe
nipple, from the assembly completed in step 3, to the 90
elbow on the gas supply line.
8. Attach one side of a union, using pipe sealant, to a 125
mm (5 in) pipe nipple.
9. Install the union/nipple assembly through the lower grom-
met in the center post.
10. Using pipe sealant, attach the 125 mm (5 in) pipe nipple
assembly from step 8 to the 90° elbow on the gas valve lo-
cated inside the unit.
11. To assemble the remainder of the gas piping, two more
nipples and a 90° elbow will be needed. The lengths of
the two nipples will vary depending on the unit and instal-
lation. Measure the two lengths of pipe that will be needed
to connect the union to the 90° street elbow on the gas
shut-off valve using a 90° elbow. The lengths of pipe will
be approximately 70 mm (2-3/4 in).
20
Installation
12. Using pipe sealant, assemble the two measured
nipples, 90° elbow, and the other side of the union.
13.Using pipe sealant, attach the assembly from step 12 to
the 90° street elbow on the gas shut-off valve, and tighten
the union.
RT-SVX31A-EN