To Connect The Condensate Drain - Navien NPE-180A2 Installation Manual

To connect the condensate drain:

1. Connect a drain line to the
bottom of the water heater.
Use only corrosion-resistant material for the
drain line, such as PVC or CPVC. Do not reduce
the size of this fitting or the drain line to less
than / in.
1
2
NPT 1 /
2
2. Place the free end of the drain line into an
appropriate drain.
If you are using a condensate
Note
●
pump, ensure that the pump
allows for up to 2 GPH of drainage
for each water heater in the
system.
If you are not using a condensate
●
pump, ensure that the drain line is
pitched downward at a minimum
slope of 1/4 in per foot.
38 Installing the Water Heater
/ in fitting at the
1
2
in
3. Fill the condensate trap inside the water heater
by pouring water through the exhaust vent
on top of the water heater until water flows
through the condensate drain.
CAUTION
The condensate line must remain unobstructed,
allowing for the free flow of condensate. If
condensate freezes in the line, or if the line is
obstructed in any other manner, condensate
can exit from the tee, resulting in potential
water damage.