Connecting The Condensate Drain - Navien NPE-180A 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. We recommend draining the condensate into
a laundry tub, as the alkali in laundry detergent will neutralize
the acid in the condensate. However, other suitable waste drain
locations may be used according to local codes.
CAUTION
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.
Before connecting the condensate drain, choose one of the
following disposal options:
Direct to the
external drain
To the
drain via a
a
neutralizer
b
External drain
c
To the
d
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 neutralizing agent
Note
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 must be higher
Note
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 a long distance
Note
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 1/2" fitting at 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 1/2".
2. Place the free end of the drain line into an appropriate drain.
3. If you are using a condensate 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" per foot.
NPT 1/2"
Installing the Water Heater 25