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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 39. Evaporator Coil Using a Separate Drain
Page 26 of 73
Figure 40. Evaporator Coil Using a Common Drain
Do not use copper tubing or existing copper condensate
lines for drain line.
Issue 2241
CAUTION
507029-05
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