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Figure 47. Unit with Evaporator Coil
Figure 48. Evaporator Coil Using a Common Drain
CAUTION
A separate drain line must be run to the drain from the
condensate trap to ensure proper drainage and pressure
switch operation. DO NOT connect the condensate trap
drain into the drain line from the evaporator coil.
IMPORTANT
When combining the furnace and evaporator coil
drains together, the A/C condensate drain outlet must
be vented to relieve pressure in order for the furnace
pressure switch to operate properly.
Figure 49. Condensate Trap with Optional Overflow
Switch
507735-03
Issue 1933
Page 29 of 53
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