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19
Air gap here
Open standpipe
LQKLJK
PLQLPXP
for coil
or
humidifier drain
TEE
(1/2” CPVC to 3/4” PVC
adapter from loose parts bag.)
To open drain
&RLORUKXPLGLILHUGUDLQ
ZKHQXVHG
+
+
+
Condensing
Furnace
-
-
- -
-
ÄÄÄÄÄÄÄÄÄÄ
ÄÄÄÄÄÄÄÄÄÄ
ÄÄÄÄÄÄÄÄÄÄ
ÄÄÄÄÄÄÄÄÄÄ
ÄÄÄÄÄÄÄÄÄÄ
ÄÄÄÄÄÄÄÄÄÄ
ÄÄÄÄÄÄÄÄÄÄ
Evaporator Coil
+ + +
< +
< +
< +
+
Blower
-
3/4” PVC
3/4
3/4
3/4
3/4
+
= Positive pressure
< +
= Pressure lower than areas with
+
ï
= Negative pressure
+
3/4” PVC
DIRECT
IO
N
OF
AIRF
LO
W
+
+
+
3/4
Open standpipe
LQKLJKPLQLPXP
Air gap required when
another drain is connected
to furnace drain.
+
TEE
(1/2” CPVC to 3/4” PVC
adapter from loose parts bag.)
+
+
+
Condensing
Furnace
ï
ï
ï ï
ï
Evaporator Coil
+
+
+
< +
< +
< +
+
Blower
ï
3/4” PVC
3/4
1/2”
CPVC
or
larger*
+
= Positive pressure
< +
= Pressure lower than areas with
+
( = Negative pressure
+
3/4” PVC
DIRECTION
OF
AIRFLOW
+
+
+
+
3/4
3/4
3/4
3/4
Open standpipe
(Optional when coil drain is
not connected to furnace
drain.)
Recommend “T” fitting
standpipe of same
diameteror larger
H[WHQGLQJXSZDUG
ZLWKPLQLPXPLQFK
high
+
+
+
Condensing
Furnace
-
-
- -
-
Evaporator
ÄÄÄÄÄÄÄÄÄ
Coil
ÄÄÄÄÄÄÄÄÄ
+
ÄÄÄÄÄÄÄÄÄ
+
ÄÄÄÄÄÄÄÄÄ
+
ÄÄÄÄÄÄÄÄÄ
ÄÄÄÄÄÄÄÄÄ
+
ÄÄÄÄÄÄÄÄÄ
< +
< +
< +
+
Blower
-
3/4” PVC
3/4
3/4
3/4
3/4
3/4
3/4
+
= Positive pressure
< +
= Pressure lower than areas with
+
ï
= Negative pressure
3/4” PVC
Open standpipe
(Optional when coil drain is
not connected to furnace
drain.)
TEE
(1/2” CPVC to 3/4” PVC
adapter from loose parts bag.)
DIRECTION
OF
AIRFLOW
A170135
Fig. 17 -- Example of Field Drain Attachment
INSTALLATION
This furnace is certified to leak 2% or less of nominal air
conditioning CFM delivered when pressurized to 1--in. water
column with all present air inlets, including bottom closure in
upflow and horizontal applications, air outlets, and plumbing
and electrical ports sealed.
NOTICE
LEVEL 0-IN. (0 MM) TO
1/2-IN. (13 MM) MAX
UPFLOW OR
DOWNFLOW
HORIZONTAL
MIN 1/4-IN. (6 MM) TO
1/2-IN. (13 MM) MAX
A11237
Fig. 18 -- Furnace Pitch Requirements