Connecting The Condensate Drain - Navien NPE-180A2 Installation Manual

3.5 Connecting the Condensate
Drain
The Navien Condensing Water Heater creates
condensation when it operates. This condensation
has an acidic pH of 3 - 5. Follow all local codes and
regulations when disposing of condensate from the
water heater. Check local codes for suitable waste
drain locations if applicable.
WARNING
Fill the condensate trap with water after
●
installing the condensate drain pipe.
Do not cap or plug the integrated condensate
●
line. If prevented from draining, condensate
can damage the water heater.
The condensate line must have a negative
●
slope to drain properly.
NEVER drink or allow animals to drink
●
condensate. The pH of the condensate could
cause serious injury.
Before connecting the condensate drain, choose
one of the following disposal options:
Direct to the
external drain
To the
drain via a
neutralizer
External drain
38 Installing the Water Heater
To the
laundry tub
To the laundry tub via
a condensate pump
a. From the water heater directly into an external
drain.
b. From the water heater, through a neutralizing
agent, and then into an external drain.
If you choose this option, the
Note
neutralizing agent must be replaced
periodically. Depletion of the
neutralizing agent will vary, based
on the usage rate of the water
heater. During the first year of
operation, the neutralizer should
be checked every few months for
depletion and replaced as needed.
c. From the water heater into a laundry tub.
The bottom of the water heater
Note
must be higher than the top of
the laundry tub to use this option.
The condensate line must have a
negative slope to drain properly.
d. From the water heater into a condensate pump,
and then into a laundry tub.
A pump can be used when there is
Note
a long distance between the water
heater and the laundry tub or when
the bottom of the water heater is
lower than the top of the laundry
tub.
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
/ in. fitting at the
1
2
in.