Navien NHB H Series User Manual

82 Installing a Common Vent System
9.2 Navien Common Vent Collar
Kit (Back-draft Damper)
The Navien Common Vent Collar Kit includes a
backdraft damper preventing the flue gases and
cold outside air from entering the boiler when the
combustion fan is off. The kit includes the cascade
cable.
By closing the exhaust vent as soon as the
combustion cycle ends, the Navien Common Vent
Collar Kit retains heat in the system for longer
periods.
Included Items
Common Vent Collar
Kit
Installation Manual
Condensing Water Heater
Common Vent System
Installation Manual
For NPE Series Water Heaters
Certied to ANSI Z21.10.3 – CSA 4.3. (Only for U.S. installations)
Keep this manual for future reference whenever maintenance or service is
required.
-
Do not store or use gasoline or other ammable vapors and liquids in the vicinity of this or any other appliance.
-
WHAT TO DO IF YOU SMELL GAS
●
Do
not
try to
light any
appliance.
●
Do
not touch any electrical switch;
do
not use any phone
in
your
building.
●
Immediately call your gas supplier from
a
neighbor’s phone. Follow the gas supplier’s
instructions.
●
If
you cannot reach your gas supplier, call the re
department.
-
Installation and service must be performed by a qualied installer, service agency or the gas supplier.
-
This entire manual must be left for the consumer. The consumer must read and refer to this manual for proper operation and
maintenance of the common vent system.
-
The installation must conform with local codes or, in the absence of local codes, the National Fuel Gas Code,
ANSI Z223.1/NFPA 54.
-
When applicable, the installation must conform with the Manufactured Home Construction and Safety
Standard, Title 24 CFR, Part 3280, Mobile Homes.
WARNING
If the information in these instructions is not followed exactly, a re or explosi on may result, causing property damage, personal
injury, or death.
Ready-Link
communication
cable
Screw (4 ea)
VID jumper wire
Specifications
5.9” (150 mm)
1.1” (28 mm)
Part Name Common Vent Collar Kit
Part No. 30014367*
Material PP (Polypropylene)
Common Vent Length Table [Total
Length (L) = W + H]
Vent Length for NHB-H Boiler Units
Required
Load
(Total BTU/H)
Model Total Length (ft)
110/150H D=3” D=4” D=6” D=8”
300,000 2 60 106 200
450,000 3 40 71 160
600,000 4 30 53 120
750,000 5 24 42 96 150
900,000 6 35 80 142
1,050,000 7 30 68 121
1,200,000 8 26 60 106
Note
●
Every 90° elbow used is equivalent to
8 linear feet (2.4 m) of vent length.
●
Branch pipe lengths are not added
to the allowable equivable vent
lengths that are provided in the
following charts.
Example of a Typical Installation
The following illustration depicts an example of a
common vent system installed for a cascade system
of 8 Navien NHB-H boiler units.
Note
The illustration is intended for
reference purposes only.

Navien NHB H Series Specifications

General

Brand	Navien
Model	NHB H Series
Category	Boiler
Language	English