Trane UX2B060AFV3VA Series Installer's Manual page 16

Installer's Guide
HORIZONTAL INSTALLATION
(Upflow/ Horizontal)
NOTE: When the factory supplied 2X3" offset reducing
coupling is used for 3" vent pipe installation, make
sure the marking "TOP" is located on the top side of
the pipe.
The straight side of the coupling must be on bottom
for proper drainage of condensate. See Figure 13.
9" MINIMUM
9" MINIMUM
Figure 14
POSSIBLE CONFIGURATIONS FOR TWO PIPE VENTING SYSTEMS
16
When the vent pipe is exposed to temperatures below
freezing, i.e., when it passes through unheated spaces,
etc., the pipe must be insulated with 1/2 inch (22.7 mm)
thick Armaflex-type insulation or equal.
If the space is heated sufficiently to prevent freezing,
then the insulation would not be required. If domestic
water pipes are not protected from freezing then it is
assumed the space meets the condition of a heated
space.
Figure 13
9" MINIMUM
ELBOW AND TEE MUST BE
AS CLOSE TOGETHER
AS POSSIBLE
▲
CAUTION
!
9" MINIMUM
9" MINIMUM
18-CD25D1-2