Connecting The Gas Supply - Navien NPE Installation & Operation Manual

To mount the water heater to the wall:
1. Affix the bracket securely to the wall and ensure that it is level
and that it can support the weight of the water heater.
2. Align the grooves on the back of the water heater with the
tongues on the mounting bracket and hang the water heater
on the bracket.
When mounted with the mounting bracket, the water heater
will have a 5 / in (16 mm) clearance from the back of the wall.
8
18 Installing the Water Heater

3.3 Connecting the Gas Supply

WARNING
Before connecting the gas supply, determine the gas type
and pressure for the water heater 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 water heater. Gas
supplies should be connected by a licensed professional
only.
To avoid damaging the connectors on the water heater, use
two wrenches when tightening pipings to the water heater.
Use one wrench to prevent the connector at the water
heater from turning, and use the other wrench to tighten
the connection. Damaged connectors may result in system
leaks.
Properly support the pipings with hangers. Do not allow
the pipings to be supported by the water heater or its
accessories.
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 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.
This water heater 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 water heater
without a Navien gas conversion kit. Doing so will result in
dangerous operating conditions and will void the warranty.