Connecting The Condensate Drain - Navien NCB-190/060H Installation & Operation Manual

3.3 Connecting the Condensate
Drain
The Navien NCB-H boiler 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 boiler. 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 the
local codes.
CAUTION
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 boiler.
The condensate line must have a negative
●
slope to drain properly.
Do not use condensate for drinking or for
●
consumption by animals.
Before connecting the condensate drain, choose
one of the following disposal options:
a
26 Installing the System Piping
c
b
d
a. From the boiler directly into an external
drain
b. From the boiler, 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 boiler. During the first year of
operation, the neutralizer should
be checked every few months for
depletion and replaced as needed.
c. From the boiler into a laundry tub.
The bottom of the boiler must
Note
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 boiler into a condensate pump,
and then into a laundry tub.
A pump can be used when there is
Note
a long distance between the boiler
and the laundry tub or when the
bottom of the boiler is lower than
the top of the laundry tub.
To connect the condensate drain:
1. Connect a drain line to the
bottom of the boiler.
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
/ in fitting at the
1
2
NPT 1/2 in