Connecting The Gas Supply - Navien NHB H Series Installation And Operation Manual

4. Connecting the Gas Supply

WARNING
To prevent death, serious injury or property
damage:
ALWAYS check the Rating Plate located on
●
the side of the product matches the gas type,
gas pressure, water pressure, and electrical
supply available for the unit.
CHECK the #1 DIP switch setting on the Front
●
panel matches the type of gas supplied to the
unit (OFF for Natural Gas and ON for Propane
Gas).
O O
N N
1 2 3 4 5 6
Switch Function Setting
1 Gas Type
Before connecting the gas supply, determine
●
the gas type and pressure for the boiler
by referring to the rating plate. Use only
the same gas type indicated on the rating
plate. Using a different gas type will result in
abnormal combustion and malfunction of
the boiler. Gas supplies should be connected
by a licensed professional only.
To avoid damaging the connectors on the
●
boiler, use two wrenches when tightening
piping to the boiler. Use one wrench to
prevent the boiler's connector from turning,
and use the other wrench to tighten the
connection. Damaged connectors may result
in system leaks.
Properly support the piping with hangers. Do
●
not allow the piping to be supported by the
boiler or its accessories.
46 Connecting the Gas Supply
1 2 3 4 5 6 7 8
Natural Gas 1-OFF
Propane Gas 1-ON
WARNING
Ensure that the gas piping is protected
●
from physical damage and freezing where
required. Failure to follow these instructions
could result in gas leakage and result in fire,
explosion, property damage, severe personal
injury, or death.
The appliance and its gas connection must
●
be leak tested before placing the appliance
in operation.
To avoid danger from explosion and fire,
●
do not use a flame to check for a gas leak.
Perform a bubble test on the joints to check
for gas leaks. If a leak exists, bubbles will
form at the leaking joint. A gas leak could
result in substantial property damage, severe
personal injury, or death.
Immediately turn off the boiler and stop the
●
gas supply if a gas leak is detected. Perform a
bubble test to find the leak and repair the leak
immediately. Do not start the boiler again
until the leak is repaired. Operating the boiler
with a gas leak could result in substantial
property damage, severe personal injury, or
death.
This boiler cannot be converted from natural
●
gas to propane or vice versa without a Navien
gas conversion kit. Do not attempt a field
conversion of this boiler without a Navien
gas conversion kit. Doing so will result in
dangerous operating conditions and will void
the warranty.