HORIZONTAL RIGHT
HORIZONTAL LEFT |
| REMOVE 2 SCREWS | |||||||||||||||||||||||||||||||||||
(FACTORY DEFAULT) |
| SECURING BLOW OFF | |||||||||||||||||||||||||||||||||||
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| PREVENTION BRACKET | ||||||||||||||||||||
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ROTATE BRACKET TO THIS
POSITION AND REINSTALL
Figure 8. Blow-Off Prevention Plate
Condensate Drain
IMPORTANT
On units of this type, where the blower “draws” rather than “blows” air through the coil, traps must be installed in the con densate drain lines (primary and auxiliary, if used). Traps prevent the blower from drawing air through the drain lines into the air supply.
ABOVE
FINISHED
SPACE?
NO
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.
LENNOX #
X3169
COMPACT OVERFLOW SWITCH WITH 3/4” FEMALE SLIP INLET AND MALE ADAPTER, TWO PART DESIGN FOR USE WHERE OBSTRUCTIONS PREVENT DIRECT THREADING
| VENT MUST EXTEND |
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| ABOVE HEIGHT OF |
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| COIL DRAIN PAN BY |
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| TWO INCHES (51MM) | VENT | ||||
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| CLEAN OUT |
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| PRESS IN |
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(DO NOT GLUE) |
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AIR HANDLER DRAIN PAN | MAIN | 1” X 3/4” X 3/4” |
| DRAIN | REDUCING |
OVERFLOW |
| TEE WITH |
| PLUG | |
DRAIN |
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YES
NOTE — WHEN A AIR HANDLER IS LOCATED ABOVE A FINISHED SPACE THE SECONDARY DRAIN PAN MUST HAVE A LARGER FOOTPRINT THAN THE AIR HANDLER.
SECONDARY |
DRAIN PAN |
WHEN A COIL IS LOCATED ABOVE A FINISHED SPACE, A 3/4” (19.1MM) SECONDARY DRAIN LINE MUST BE:
SCONNECTED TO SECONDARY DRAIN PAN OR
SCONNECTED TO THE OVERFLOW DRAIN OUTLET OF THE AIR HANDLER DRAIN PAN.
LENNOX1
49P66,
91P90 OR ANY
PVC SCH 40 P- OR
TRAPS MUST BE DEEP ENOUGH TO OFFSET MAXIMUM STATIC DIFFERENCES — GENERALLY, TWO INCHES (51MM).
1LENNOX
2PIPE NIPPLE PROVIDED IN BAG ASSEMBLY - SCH 80, 3/4” I. D. X 5” - 34K7401 (1): CUT THE PIPE IN HALF AND USE IT TO ROUTE THE MAIN DRAIN.
TRAP DEPTH | TO APPROVED | ||||
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| DRAIN |
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FOR NEGATIVE PRESSURE COILS (BLOWER | DRAIN LINE SHOULD | ||||
AFTER COIL) TRAPS ARE REQUIRED ON ALL | |||||
SLOPE A MINIMUM OF | |||||
DRAIN LINES CONNECTED TO COIL. | |||||
ONE | INCH | PER | 10 | ||
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| FEET | (25MM | PER | 3 | |
| METERS) |
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Figure 9. Typical Main and Overflow Drain
Page 6