Carrier 59TP6B - Example of Field Drain Attachment (Not Allowed)

18
with local building codes. A factory--supplied 1/2--in.
CPVC to 3/4 --in. PVC adapter is supplied in the loose parts
bag for use as required.
8. Install the adapter or connect the 1/2--in. CPVC pipe by
sliding a spring clamp over the open end of the elbow or
grommet on the outside the furnace casing.
9. Open the spring clamp and insert the long end of the
adapter or the 1/2--in. CPVC pipe into the outlet stub on the
drain tube.
10. Connect additional condensate piping to a code--approved
drain, or to a condensate pump approved for use with acidic
furnace condensate and compatible with mineral and
vegetable oils, such as canola oil.
Allow at least 1/4-in. per foot (20 mm per meter) of slope down
and away from the furnace in horizontal sections of drain line.
+
+
+
Condensing
Furnace
-
-
-
-
-
Evaporator Coil
+
+
+
< +
< +
< +
+
Blower
-
+ = 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.
+
DIRECTION
OF
AIRFLOW
+
+
+
+
+
+
+
+
+
+
Condensing
Furnace
-
-
-
-
-
Evaporator Coil
+
+
+
< +
< +
< +
+
Blower
-
3/4” PVC
1/2
3/4
1/2” CPVC or larger*
+ = Positive pressure
< + = Pressure lower than areas with +
− = Negative pressure
+
3/4” PVC
DIRECTION
OF
AIRFLOW
+
+
+
+
1/2
3/4
3/4
3/4
Open
standpipe
+
+
3/4
+
+
+
+
Condensing
Furnace
-
-
-
-
-
Evaporator Coil
+
+
+
< +
< +
< +
+
Blower
-
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
3/4
+
+
+
+
+
+
+
++
+
A14532
Fig. 13 -- Example of Field Drain Attachment (Not Allowed)