Navien NCB300-28K, Installation & Operation Manual

Page: 32 / 82

Connecting the Gas Supply 31
WARNING
●
If a gas type other than the one specified on the boiler
reference plate is used, it could cause a fire or even an
explosion.
●
It is important to ensure that the gas supply is suitable
for the type and capacity of the boiler.
●
Thoroughly check the seal and draining of the entire
installation, as a gas leak could cause serious damage.
DANGER
●
Gas leaks can cause explosions resulting in serious
personal and material damage.
●
Keep all doors and windows open while you are bleeding
the gas pipes and put out any cigarettes, flames or other
possible source of ignition.
For the installation of any type of gas, the installer must be
suitably qualified and the gas supply must comply to the current
Gas Safety (Installation and Use) Regulations, in accordance with
BS 6891.
However, the following recommendations must be complied
with, at the least:
●
Before installing the gas pipes, check the type of gas is
compatible with the boiler.
●
Check that the gas meter in the home can measure the rate of
gas supply required.
●
The gas pipe diameter is not determined by the boiler
connection. It should be calculated in accordance with its
length and consequently its pressure drop.
●
Check there are no leaks from the installation.
To connect the gas supply:
1. Connect the gas supply pipe to the connection located on
the underside of the appliance.
2. After completing the gas installation, check there are no
leaks and purge the air from all the pipes, following the
procedures described in the applicable standards to this
respect.
Gas Shutoff Valve
Gas Supply
Union
Bottom View
Gas Inlet Adapter
Union
5. Connecting the Gas Supply