28 Installing the System Piping
3.3 Connecting the Condensate
Drain
The Navien NFC-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 suitable
external drain. 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.
To attach the condensate trap to the boiler:
1. Check the components of the condensate trap.
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 domestic cold and domestic
hot.
●
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.
Содержание NFC-250/175H
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