About the Boiler 25
3.3 Connecting the Condensate Drain
The Navien NFC 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
●
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.
To attach the condensate trap to the boiler:
1. Check the components of the condensate trap.
2. Insert the condensate trap to the drain adapter at the bottom
of the boiler.
3.2.3 DHW System Piping
CAUTION
To comply with ASME or CRN requirements, an additional high
temperature limitation appliance may be needed. Consult
your local code requirements to determine if this appliance is
required.
Refer to the following illustration for a typical DHW piping example
for the boiler.
Cold Water Supply
DHW Supply
When installing the DHW system, follow these guidelines:
●
Use only pipes, fittings, valves, and other components (such as
solder), that are approved for use in potable water systems.
●
Tighten the connection valves with care to avoid damage.
●
Navien recommends using unions and manual shut-off valves
on the cold water inlet and DHW outlet.
●
Keep the hot water piping system as short as possible, to deliver
hot water to the fixtures more quickly.
●
Recirculation controls are included with the boiler for use of an
optional external recirculation system.
●
To conserve water and energy, insulate the DHW supply and
DHW recirculation lines (if applicable). Do not cover the drains or
pressure relief valves.
●
After installing the boiler, clean the cold water inlet filter.
Then, test the boiler for proper DHW supply and inspect for
leaks. Instruct the boiler owner that the filter must be cleaned
periodically to maintain proper DHW flow.
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