I
Gas Piping:
....
Gas Piping Guidelines:
�
Navien recommends the water heater be the first appliance installed
downstream of the gas meter
to ensure it will have sufficient supply of gas;
� Use the charts on the following pages to properly size the gas supply pipe;
� The gas connection fitting on all Navien units is %".
DO NOT
use less than %"
piping;
� When using flexible gas line, ensure the pipe's inner diameter is sufficient to supply
the required BTUs; also ensure that the flexible line has no crimps or tight bends
that will restrict gas flow;
� Install a manual gas shut-off valve between on the gas supply line close to the water
heater;
� When using rigid pipe, Navien recommends the installation of a union on the gas
supply pipe close to the water heater to facilitate any future maintenance and
service;
Gas supply Line Pressures:
1 .
The minimum and maximum inlet gas pressures are:
Natural Gas Min. 3.0" WC - Max. 1 0.5" WC
Propane Gas Min. 8.0" WC - Max. 1 3.5" WC
2. Gas pressures outside of the above specified ranges will result in adverse
performance and dangerous operating conditions; any damage resulting from
improper gas supply pressures will not be covered by warranty;
3. Until pressure testing of the main gas supply line is completed, ensure the gas line to
the Navien Water Heater is disconnected to avoid any damage to the water heater;
4. The appliance must be isolated from the gas supply piping system by closing its
individual manual shutoff valve during any pressure testing of the gas supply piping
system at test pressures equal to or less than Y2 psi (3.5 kPa);
5.
The gas appliance and its gas connections must be leak tested before placing the
appliance in operation. Leaks can be found by applying soapy water to all gas
fittings and observing for bubbles or using a gas leak detection device ;
6.
Always purge the gas line of any debris before connecting to the heater gas inlet.
7.
Never use an open flame to test for gas leaks, as property damage, personal injury,
or death could result.
Summary of Contents for CC-180
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