About The Boiler; Description Of The Boiler; Parts Of The Boiler - Navien NHB-055H User's Information Manual

2. About the Boiler

2.1 Description of the Boiler

The Navien NHB-H boiler is available in 4 models:
NHB-055H, NHB-080H, NHB-110H and NHB-150H.
The main features are as follows:
Power Interruption: When the power is restored
●
after a power failure, the boiler will automatically
start and return to normal operation. A manual
reset is not required.
Short-Circuit Protection: Any short-circuit
●
occurring in the boiler's electrical circuit
immediately blows the internal glass fuses and
automatically cuts off the gas supply.
Lightning Protection: Each boiler is specially
●
grounded, both internally and externally, to
protect against lightning strikes.
Auto Fan Detection: The rotation of the fan is
●
automatically detected and controlled. Fan failure
will stop the operation of the boiler.
Boiling Prevention: Excessive temperatures will
●
automatically stop the boiler.
6 About the Boiler

2.2 Parts of the Boiler

2.2.1 Front View
Combustion
Air Intake
2.2.2 Bottom View
A
# Description
A Rubber Grommets
B Gas Connection
C Space Heating Supply Connection
D Condensate Outlet
E Space Heating Return Connection
Exhaust
Gas Vent
B
C
D
E