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The VTAC unit is equipped with a primary and secondary drain fitting. An external or an internal drain pipe must
be attached to the primary drain fitting. The secondary drain fitting is provided for connection when required by
state and local codes. Refer to local codes for proper installation of the drains.
External Drain:
Attach a 90° PVC elbow to the unit’s female ¾” NPT drain fitting. Use the other end of the elbow to run a ¾”
schedule 40 PVC pipe to a P-Trap and then through the knockout hole of the Wall Plenum to the outside. A notch
must be cut in the rear grille (louver blade) to allow the tube to pass through. Seal the gap between the Wall Ple-
num hole and PVC tube.
The secondary drain fitting is shipped open (unplugged) and must either be plugged (if not used) or connected to
an independent drain system. If a secondary drain system is used, attach a 90° schedule 40 PVC elbow to the sec-
ondary drain fitting directed toward the secondary drain system. If a secondary drain system is NOT used, install
a ¾” schedule 40 PVC MNPT plug to cap the hole.
INSIDE WALL
Side View
Primary Drain Connection
(External)
Side View
OUTSIDE WALL
PVC (INTERNAL DRAIN):
- FEMALE DRAIN FITTING, 3/4” PVC
Primary Drain Connection
(Internal)
SECONDARY 3/4” DRAIN OPTION IS PROVIDED (SEE DETAIL “A” ABOVE). CAN BE CONNECTED TO EITHER AN EXTERNAL DRAIN OR INTERNAL
DRAIN SIMILAR TO PRIMARY CONNECTIONS SHOWN ABOVE. IF NOT USED, SEAL WITH A MNPT PLUG.
NOTE: PIPING IS NOT
SUPPLIED WITH THE UNIT.
OBTAIN LOCALLY.
2-INCH (MIN.)
10-INCH (MAX.)
Ensure drain lines exiting the plenum are sufficiently
sloped downward to allow water to drain out.
INSIDE WALL
OUTSIDE WALL
Secondary Drain Connection
(Optional)
EXTERNAL DRAIN:
- FEMALE DRAIN FITTING, 3/4” PVC
- PVC 90° ELBOW
- P-TRAP
DETAIL A
DRAIN PAN FITTINGS
PRIMARY
(INTERNAL)
SECONDARY (EXTERNAL)
A
A
Installation - Drains
