International comfort products C Series Installation Instructions Manual page 19

INSTALLATION INSTRUCTIONS
Example of Field Drain Attachment
Figure 13
(NOT ALLOWED)
Evaporator Coil
+ + +
+ +
Condensing
Furnace
+
+
+
< +
< +
-
-
Blower
-
- -
-
Evaporator Coil
+
+
+
Condensing
Furnace
+
+
+
Blower
-
- -
-
+ = Positive pressure
< + = Pressure lower than areas with +
− = Negative pressure
Evaporator Coil
+
+
+
Condensing
Furnace
+
+
+
-
-
Blower
-
- -
-
+ = Positive pressure
< + = Pressure lower than areas with +
− = Negative pressure
440 01 4104 07
+ = Positive pressure
< + = Pressure lower than areas with +
+
− = Negative pressure
+
Blower creates positive pressure.
Positive pressure extends into coil
+ condensate drain (no trap).
< +
Furnace condensate does not flow
consistently when drain is at positive
+ pressure.
+
+
+
A14532A
Open
standpipe
3/4" PVC
+
+ + +
3/4
+
3/4" PVC
3/4
+
3/4
1/2" CPVC or larger*
+
< +
< + < +
3/4
-
1/2
+
-
1/2
+
3/4
A14532B
3/4" PVC
+
+ +
3/4
+
3/4" PVC
3/4
+
+
3/4
1/2" CPVC or larger*
+
+
< +
3/4
< +
< +
+
+
+
+
3/4
+
+
+ +
3/4
A14532C
Specifications subject to change without notice.
Figure 14 Example of Field Drain Attachment
Ä Ä Ä Ä Ä Ä Ä Ä Ä Ä
Evaporator Coil
+ + +
Ä Ä Ä Ä Ä Ä Ä Ä Ä Ä
Ä Ä Ä Ä Ä Ä Ä Ä Ä Ä
Ä Ä Ä Ä Ä Ä Ä Ä Ä Ä
Ä Ä Ä Ä Ä Ä Ä Ä Ä Ä
Ä Ä Ä Ä Ä Ä Ä Ä Ä Ä
+
Ä Ä Ä Ä Ä Ä Ä Ä Ä Ä
Condensing
+ Furnace
+
+
-
Blower
-
-
- -
-
+ = Positive pressure
< + = Pressure lower than areas with +
= Negative pressure
Evaporator Coil
+
+
+
Condensing
Furnace
+
+
+
Blower
+ = Positive pressure
< + = Pressure lower than areas with +
( = Negative pressure
Gas Furnace: N9MSB
Air gap here
Open standpipe
for coil or
humidifier drain
TEE
(1/2" CPVC to 3/4" PVC
adapter from loose parts bag.)
To open drain
A170136
3/4" PVC
+
3/4 +
3/4" PVC
3/4
+
Open standpipe
Air gap required when
+
another drain is connected
+
to furnace drain.
3/4
TEE
(1/2" CPVC to 3/4" PVC
adapter from loose parts bag.)
< +
< + < +
3/4
3/4
A170139
Open standpipe
(Optional when coil drain is
3/4" PVC not connected to furnace
drain.)
+ + +
3/4
+
3/4" PVC
3/4
+
+
3/4
1/2" CPVC or larger*
Recommend "T" fitting
high
< +
standpipe of same
< + < +
diameteror larger
3/4
3/4
A170129
19