Rinnai Demand Duo CHS199100CUiP Installation And Operation Manual page 40

A Condensate line must be installed to the 1/2 in. PVC
elbow located at the left side of the lower enclosure.
Condensate line must pitch toward the drain.
Air gap must be installed on the condensate line to
enable the condensate to drain.
•
DO NOT connect the condensate drain line
with an air conditioning evaporator coil drain.
•
Water heaters have an integrated condensate
trap. DO NOT install an external condensate
trap.
40
DO NOT
EXTERNAL TRAP
NOT REQUIRED
Rinnai Commercial Hybrid System Installation and Operation Manual
•
The end of the condensate drain pipe should be
open to the atmosphere. The end should not be
under water or other substances.
CORRECT
Pipe open to
atmosphere
Water
Level
CONDENSATE DRAIN
(1/2 in. PVC)
NOT
CORRECT
Pipe submerged
in water
Water
Level