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26 Installing the System Piping
To connect the condensate drain:
1. Connect a drain line to the
1
/
2
in fitting at 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
1
/
2
in.
NPT 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 3 GPH of drainage for
each boiler in the system.
4. 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.
Before connecting the condensate drain, choose
one of the following disposal options:
a
b
c
d
a. From the boiler directly into an external
drain.
Note
Do not install a fixed connection for
the drain.
b. From the boiler, through a neutralizing agent,
and then into an external drain (refer to “3.2.1
Condensate Neutralizer Kit” on page 27).
Note
If you choose this option, the
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.
Note
The bottom of the boiler 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 boiler into a condensate pump,
and then into a laundry tub.
Note
A pump can be used when there is
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.
Summary of Contents for NFB-175H
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