Instruction Manual

508269B01 Issue 2217 Page 7 of 9
Best Practices
The following practices are recommended to ensure better condensate removal:
• Main and overow drain lines should NOT be smaller than drain connections at drain pan.
• Overow drain line should run to an area where homeowner will notice drainage.
• It is recommended that the overow drain line be vented and a trap installed. Refer to local codes.
Figure 11. Right-Hand Air Discharge with Spacer
ABOVE
FINISHED
SPACE?
OVERFLOW DRAIN LINE
ALWAYS RUN AN OVERFLOW DRAIN LINE. IF NOT POSSIBLE TO
ROUTE OVERFLOW DRAIN LINE, INSTALL LOW VOLTAGE
OVERFLOW SWITCH KIT. WIRE KIT TO SHUT DOWN
COMPRESSOR PER INSTRUCTIONS.
NO
YES
CLEAN OUT
VENT
PRESS IN
(DO NOT GLUE)
VENT MUST EXTEND
ABOVE HEIGHT OF
COIL DRAIN PAN BY
TWO INCHES
1” X 3/4” X 3/4”
REDUCING
TEE WITH
PLUG
PVC SCH 40 P-
OR J-TRAP 3/4”
OVERFLOW
DRAIN
OPTIONAL
SAFETY
PAN
COIL DRAIN PAN
WHEN A COIL IS LOCATED ABOVE A FINISHED SPACE, A 3/4” SECONDARY DRAIN LINE
MUST BE:
●CONNECTED TO SECONDARY DRAIN PAN OR
●CONNECTED TO THE OVERFLOW DRAIN OUTLET OF THE AIR HANDLER DRAIN PAN.
TRAPS MUST BE DEEP ENOUGH TO OFFSET MAXIMUM STATIC DIFFERENCES —
GENERALLY, TWO INCHES.
DRAIN LINE SHOULD
SLOPE A MINIMUM OF
ONE INCH PER 10 FT.
NOTE — WHEN A AIR HANDLER IS LOCATED ABOVE A FINISHED SPACE THE SECONDARY
DRAIN PAN MUST HAVE A LARGER FOOTPRINT THAN THE AIR HANDLER.
MAIN
DRAIN
TO APPROVED
DRAIN
FOR NEGATIVE PRESSURE COILS (BLOWER
AFTER COIL), TRAPS ARE REQUIRED ON ALL
DRAIN LINES CONNECTED TO COIL.
COMPACT OVERFLOW SWITCH WITH 3/4” FEMALE SLIP INLET
AND MALE ADAPTER, TWO-PART DESIGN FOR USE WHERE
OBSTRUCTIONS PREVENT DIRECT THREADING
SECONDARY
DRAIN PAN
2”
(51MM)
TRAP DEPTH