Horizontal Installation—Left to Right Airflow
The condensate drain should be routed directly to a locally
acceptable disposal area. The condensate drain line should
not be run directly to the outdoors especially in colder
climates where temperatures may cause the condensate to
freeze in the drain line.
Furnace must be mounted such that the side through which
the condensate will drain is elevated a minimum of 9" above a
surface such as a floor.
Install furnace at a slight pitch forward with shims or adjusting
" (6.4 mm) maximum
1. Relocate ¹⁄₂" (1.3 cm) NPT plug from the flue pan to the
internal trap assembly.
2. Connect the ¹⁄₂" (1.3 cm) NPT plug (supplied in kit) to the
opposite side of the internal trap assembly from the NPT plug
installed in Step 1.
" (1.3 cm) NPT plug (supplied in kit)
B. Internal trap assembly
" (1.3 cm) NPT plug
3. Insert external trap assembly (supplied in kit) into flue pan.
4. Connect a length of ³⁄₄" PVC pipe (36" [91.4 cm] minimum) to
5. Install a ³⁄₄" (1.9 cm) PVC tee as shown.
6. From the ³⁄₄" (1.9 cm) PVC tee, connect the drain to the
7. Connect one end of vinyl hose (supplied in kit) to the ³⁄₈"
A. Flue pan
B. Condensate drain and external trap assembly
(supplied in kit) with
the external trap assembly (supplied in kit).
" (1.9 cm) PVC tee
B. 72" piece of
" (1.9 cm) PVC pipe
NOTE: The top of the PVC tee must be left open for proper
condensate drainage. The open end of the PVC tee must be
oriented so that the condensate does not run out of this
barbed fittings of the 2" x 2" x ¹⁄₂" (5.1 cm x 5.1 cm x 1.3 cm)
PVC tee in vent and the other end to the ³⁄₈" (1 cm) barbed
fitting on the drain trap assembly.
IMPORTANT: Be sure to avoid double-trapping the vinyl
hose. Hose must be installed as shown above.
" (1.9 cm) PVC pipe outlet
" (1 cm) vinyl hose