Section 12. Condensate Drain Piping - Trane GAF2A0A36S31EE 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.
• A 1.5" minimum distance from the coil panel to the
inside of the condensate tubing is recommended for
coil panel removal.
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 oriented
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 horizontal 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 opening.
• 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
cement. 1.5" minimum clearance to the condensate
piping is needed for coil panel removal. Thread the
assembly into the primary drain connection (repeat for
the secondary drain connection if used).
Important: For horizontal applications, 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.
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• Do not use reducing fittings in the condensate
drain lines.
• 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.
Optional pipe kit BAYCNDPIP01A is available
(10 pcs per kit).
S
P
Upflow
Condensate
Drains
Teflon Tape
Drain Nipple
3/4" PVC pipe
PVC
CEMENT
PVC/CPVC Cement