15
recommended that a removable access panel be provided
inspection or such that a sampling probe can be inserted
measure the static pressure of the return duct at the
2"
NOTE:
RAISE FURNACE BY AT LEAST 2"
FROM THE MAX LEVEL OF OVER
FLOW WATER IN CONDENSATE
OVERFLOW DRAIN PAN.
RETURN AIR DUCT
PLEASE ENSURE THE
BOTTOM OF FURNACE
IS SEALED PROPERLY
IF SIDE RETURN
DUCTS ARE USED
DRAIN PIPE
CONDENSATE OVERFLOW
DRAIN PAN
BLOCK AT EACH CORNER
UNDERNEATH THE FURNACE
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