Navien KDB-535GTD Installation Manual page 12

M e d i u m - s i z e d g a s b o i l e r
The gas piping installation shall be performed by the gas
company and the gas piping installation company.
1
Refer to the "Specifications" presented in this installation
manual, with regard to the connection size.
2
Use the metal pipe or the metal flexible pipe which
passed a gas appliance test for gas piping. When LP gas
is used, never install the fuse cock, and be sure to install
the gas middle valve. (Installation of the fuse cock may
cause a boiler malfunction.)
3
The following shall be kept in mind, when using LP gas.
The domestic low pressure regulator, appropriate for the
indicated gas consumption, shall be used as the LP gas
regulator.
2 or more vessels with a weight of 50kg shall be installed
to be used for the LP gas vessel. (Connect the twin valve
to simultaneously supply the gas from 2 vessels.)
※ The vessels with a small capacity may result in gas loss
for lack of vaporization volume, which may cause a
boiler malfunction.
4
Be sure to connect the gas pipe directly to the main
pipe. Never connect the gas pipe in common with
other gas appliances.
5
A
separable union connection or a nut connection
shall be made on the connection points.
6
The gas pipe shall be installed with its surface
exposed to the outside. However, the copper pipe, the
stainless steel pipe, or other pipes made of heat- and
corrosion-resistant materials without connection
joints (except for welding joints) may be buried for
installation.
7
Be sure to install the gas leak alarm device and the
gas breaker in the boiler room.
LP gas: lower than the boiler
(300mm above the ground level)
LNG : higher than the boiler
40