HEIGHT: OPTION “B”
HEIGHT: OPTION “A”
HEIGHT OF LOWER
CONDENSATE DRAIN SENSOR
CONDENSATE TRAP
DRAIN LINE
NEUTRALIZER
CARTRIDGE
(OPTIONAL)
OVERFLOW LINE
(REQUIRED ONLY WHEN
OPTIONAL NEUTRALIZER
CARTRIDGE IS USED)
TO FLOOR DRAIN
OR
CONDENSATE PUMP
AIRFLOW
HEIGHT: OPTION “B”
HEIGHT: OPTION “A”
HEIGHT OF LOWER
CONDENSATE DRAIN SENSOR
CONDENSATE TRAP
DRAIN LINE
OVERFLOW LINE
(REQUIRED ONLY WHEN
OPTIONAL NEUTRALIZER
CARTRIDGE IS USED)
TO FLOOR DRAIN
OR
CONDENSATE PUMP
NEUTRALIZER
CARTRIDGE
(OPTIONAL)
AIRFLOW
HEIGHT: OPTION “B”
HEIGHT: OPTION “A”
HEIGHT OF LOWER
CONDENSATE DRAIN SENSOR
CONDENSATE TRAP
DRAIN LINE
NEUTRALIZER
CARTRIDGE
(OPTIONAL)
OVERFLOW LINE
(REQUIRED ONLY WHEN
OPTIONAL NEUTRALIZER
CARTRIDGE IS USED)
TO FLOOR DRAIN
OR
CONDENSATE PUMP
NOTE:
THESE IMAGES INTENTIONALLY DEPICT GENERIC VIEWS OF
THE DRAIN ROUTING, THE INSTALLER HAS THE OPTION TO
ROUTE THE DRAIN TO THE RIGHT OR LEFT SIDE OF THE
FURNACE AS NEEDED.
A
I
R
F
L
O
W
HEIGHT:
OPTION “B”
HEIGHT: OPTION “A”
HEIGHT OF LOWER
CONDENSATE DRAIN SENSOR
CONDENSATE TRAP
DRAIN LINE
NEUTRALIZER
CARTRIDGE
(OPTIONAL)
OVERFLOW LINE
(REQUIRED ONLY WHEN OPTIONAL
NEUTRALIZER CARTRIDGE IS USED)
TO FLOOR DRAIN
OR
CONDENSATE PUMP
A
I
R
F
L
O
W
HORIZONTAL LEFT
HORIZONTAL RIGHT
DOWNFLOW
UPFLOW
CONDENSATE DRAIN LOCATING
INSTRUCTIONS
ST-A1194-4
ST-A1194-42-X0
VENT TUBE HEIGHT
Vent tube height is optional:
Option A:
Install vent tube height
with top of the tube Below the
level of the water sensor to allow
the furnace to run when the drain
is blocked, This option will spill
water out of the tube when the
drain is blocked, but the furnace
will continue to run.
Option B:
Install vent tube height
with top of the tube Above the
level of the lower condensate
water sensor to shut the
furnace down when the drain is
blocked. This option will not spill
water from the drain vent
but the furnace will also
not continue to run
with a blocked
drain.