Navien NHB H Series Installation And Operation Manual page 29

WARNING
Do not turn the power on until electrical
●
wiring is finished.
before servicing. Death or serious injury
from electrical shock may result if power is
supplied to the boiler during electrical wiring
or servicing.
The boiler, when used in conjunction with an
●
air conditioning system, must be installed so
that the chilled medium is piped in parallel
with the heating boiler. Appropriate valves
must be used to prevent the chilled medium
from entering the boiler.
If the boiler is connected to heating coils
●
located in air handling units where they
can be exposed to refrigerated air, use flow
control valves or other automatic means to
prevent gravity circulation of the boiler water
during the cooling cycle.
Configuring a Zone System
The NHB-H boiler can control up to 3 zones utilizing
zone valves or zone pumps. After installing the
system, the boiler operation must be configured
accordingly using the front panel.
To configure a zone system:
On the front panel, press the Menu button (
enter the setting menu, and then select 2. Space
Htg Operation > 2.Zone Settings.
Disconnect power
) to
3.5.1 Examples of System Applications
Refer to the following examples to properly
implement a system for space heating, DHW
supply, or both. These examples are provided to
suggest basic guidelines when you install the boiler
system. However, the actual installation may vary
depending on the circumstances, local building
codes, or state regulations. Check the local building
codes and state regulations thoroughly before
installation, and comply with them fully.
WARNING
Ensure the power is turned off while making
wiring connections. Boiler components or
the boiler may fail and result in serious injury
or death if power is supplied during wire
connection. Product failures caused by incorrect
installation are not covered by warranty.
Installing the System Piping 29