Section 12. Condensate Drain Piping - Trane TAM7A0A24H21SB Installer's Manual

Section 12. Condensate Drain Piping

12.1 Condensate Drain Piping Considerations
• Condensate drain plumbing must comply with na-
tional, state, and local codes.
• Route condensate drain lines away from air handler
so they do not interfere with access panels.
• Slope the drain lines downward a minimum of 1/4"
per foot, support per local codes.
• Do not use reducing fittings in the condensate drain
lines.
12.2 Connect Condensate Drain Piping
Note: Upflow and horizontal orientations require the
Coil panel to be removed in order to make the drain
connections. Note: Make certain that the unit has been
installed in a level position to allow for proper draining.
STEP 1 - Select the drain connections that are ori-
ented for your application.
STEP 2 - Prepare the condensate drain connections.
• From the factory, the unit comes with plugs in both
upflow condensate drains and an additional plug in
the documentation packet.
• For upflow applications, remove upflow condensate
plug(s) and connect condensate piping.
• For all other applications, do not remove upflow con-
densate plugs. Remove the cover from the needed
condensate drain connections and connect conden-
sate piping.
• If the secondary condensate opening is not used,
plug the condensate opening with the fitting supplied
in the documentation pack. Use scissors to cut the
air seal in half and re-install over the unused open-
ing.
• Dry fit and test clearance for coil panel removal
before applying PVC/CPVC cement
• Use Teflon tape on the air handler drain line
connections. Do not use pipe joint compound or
PVC/CPVC cement on drain nipple.
• Hand tighten the drain pipe.
STEP 3 - For Upflow installations, connect 3/4" PVC
pipe to the threaded drain nipple with PVC/CPVC ce-
ment. 3" minimum clearance to the condensate piping
is needed for coil panel removal. Thread the assembly
into the primary drain connection (repeat for the sec-
ondary drain connection if used).
Important: For Horizontal and Downflow installations,
the following order must be observed:
1) Remove panel and insert the 3/4" nipples.
2) Reinstall the panel.
3) Connect the condensate lines to the nipples.
Note: A small amount of sealant must be applied
around the drain line(s) passing through the panel
to prevent air leakage and possible water drips.
• Do not connect the drain line to a closed drain
system.
• Do not use a torch or flame near the plastic drain
pan coupling.
• A P-trap is not required for proper drainage due to
the positive pressure of the air handler; however,
it is recommended to prevent efficiency loss of
conditioned air.
Air seal
over secondary
drain
Note: A small amount of sealant must be applied
around the drain line(s) passing through the panel
to prevent air leakage and possible water drips.
Downflow
Condensate
Drains
S
P
Upflow
Condensate
Drains
Teflon Tape
Drain Nipple
3/4" PVC pipe
PVC
CEMENT
PVC/CPVC Cement
25