CAPFA Installation Manual

4
11. Plastic Drain Pan Application
D O NOT USE THE COIL PAN SHIPPED WITH THE UNIT ON OIL FURNACES
OR ANY APPLICATION WHERE THE TEMPERATURE OF THE DRAIN PAN MAY
EXCEED 300°F. A HIGH TEMPERATURE DRAIN PAN SUCH AS KITS HTP-A,
-B, -C
AND -D FOR NORMAL CABINET WIDTHS OF 14, 17.5, 21 AND
24.5
INCHES , RESPECTIVELY , SHOULD BE USED FOR APPLICATIONS WHERE
THE TEMPERATURE EXCEEDS 300°F AND BELOW 450°F. A FIELD
FABRICATED METAL DRAIN PAN CAN ALSO BE USED FOR APPLICATIONS
WHERE TEMPERATURE EXCEEDS 300°F.
F
AILURE TO FOLLOW THIS WARNING MAY RESULT IN PROPERTY DAMAGE
AND / OR PERSONAL INJURY .
If the uncased coil is to be installed on top of a gas furnace, allow
enough space between the top to the furnace and the bottom of
the plastic coil drain pan to have a free flow of air.
A minimum of 2.0" distance from the top of the furnace and the
bottom of the coil pan is required.
NOTE: The coil must be installed with the line set and drain open-
ings to the front of the furnace.
X
2"
GAS FURNACE
OR
COIL
SUPPORT
FIELD FABRICATED SUPPORT
FOR UNCASED COILS
BOTTOM FLANGE
DETAIL CAN BE
TYPICAL OF THE
DETAILS BELOW
X = COIL PAN WIDTH
+ INSULATION THICKNESS X 2
Figure 4
NOTE: Water coming from the secondary line means the coil pri-
mary drain is plugged and needs immediate attention.
Install a trap in the drain line below the bottom of the drain pan
(Figure 5). If using a copper drain line, solder a short piece of
pipe, minimum 6” length, to the connector before installing a
drain fitting.
DO NOT over torque the 3/4” copper connector to the plastic
drain connection. Using a wet rag or heatsink material on the
short piece to protect the plastic drain pan, complete the drain
line installation. Use Figure 6 as a template for typical drain pipe
routing. This figure shows how to avoid interference with vent
piping.
2” MIN.
3” MIN.
Figure 5
80.0% FURNACE 92.6% FURNACE
92.6% FURNACE
Figure 6
12. Return Ductwork
DO NOT TERMINATE THE RETURN DUCTWORK IN AN AREA
THAT CAN INTRODUCE TOXIC OR OBJECTIONABLE FUMES/
ODORS INTO THE DUCTWORK.
13. Aluminum Indoor Coil Cleaning
(Qualified Servicer Only)
This unit is equipped with an aluminum tube evaporator coil.
The safest way to clean the evaporator coil is to simply flush the
coil with water. This cleaning practice remains as the recom-
mended cleaning method for both copper tube and aluminum
tube residential evaporator coils.
It has been determined that many coil cleaners and drain pan
tablets contain corrosive chemicals that can be harmful to alu-
minum tube and fin evaporator coils. Even a one-time applica-
tion of these corrosive chemicals can cause premature alumi-
num evaporator coil failure. Any cleaners that contain corrosive
chemicals including, but not limited to, chlorine and hydroxides,
should not be used.
An alternate cleaning method is to use one of the products listed
in TP-109* to clean the coils. The cleaners listed are the only
agents deemed safe and approved for use to clean round tube
aluminum coils. TP-109 is also available on the web site in Part-
ner Link > Service Toolkit.
NOTE: Ensure coils are rinsed well after use of any chemical clean-
ers.