Condensate Drain & Cleaning - Navien NR-180 Installation Manual

Navien Gas Water Heater Installation
█ Condensate Drain & Cleaning:
 A condensate drain tube is included with the Navien Water Heater. This tube
must be connected to the port at the bottom of the unit (see below). The end of
the tube should drain to a laundry tub or to a floor drain. If additional tubing is
required, any ¾" polyvinyl tubing should suffice.
 Over time, blockage of the siphon by debris may occur; when the condens ate
cannot be released, the water heater will go into error and will shut down. When
this occurs, the siphon must be cleaned. To clean, you will need a bucket to
collect any residual water. See figures below.
siphon
 Once the cap and clip have been re-inserted, the syphon must be re-filled. See
figure below.
Remove retaining clip
Prepare bucket; twist and remove cap;
drain, clean out siphon and re-insert cap
and retaining clip.

Open the valve and water will begin to fill in
the syphon. Fill the siphon to the top and
then close the valve.

Open a hot water faucet; examine the
open end of the condensate drain line to
ensure no flue gases are exiting from that
pipe. If the flue gases are exiting,
immediately stop the unit and call Navien
for additional instructions.
21