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Unpacking
>
Navien
Condensing
Boiler
User’s Information
Manual,
Installation &
Operation Manual
Quick
Installation
Manual
Air Vent
High Altitude
Conversion Kit
(Natural Gas Only)*
Propane
Conversion
Kit*
Tapping Screws
and Anchors
Pressure Relief
Valve, Heating
2 in Vent
Termination
Caps
Air Vent
Bushing
(
3
/
4
in to
1
/
2
in)
Outdoor
Temperature
Sensor and Cable
Condensate
Trap
Wall Flanges
Wall Mounting
Bracket
Universal
Temperature
Sensor
Spare Parts
* High Altitude Conversion kit and Propane Conversion kit are attached
to the inside of Product’s cover.
Model
NFC-250/175H
NFC-250/200H
Quick Installation Guide
STEP 1 Before Installing
Read the Installation & Operation Manual before installing.
This product must be installed and serviced by a licensed plumber,
a licensed gas fitter, or a professional service technician. Navien is
not liable for any damages or defects resulting from improper
installation.
WARNING
Follow all local codes and/or the most recent edition of the National Fuel Gas Code (ANSI
Z223.1/NFPA 54) in the USA, or the Natural Gas and Propane Installation Code in Canada
(CAN/CGA B149.1).
Safety
DO NOT install the boiler in areas with excessively high humidity.
Location Requirements
Select the best location on “Choosing an Installation Location” in the Installation &
Operation Manual.
Allowable minimum clearances
Top
Back
Side
Side
Front
Bottom
Clearance
Indoor Installation
Top
9 in (229 mm) minimum
Back
0.5 in (13 mm) minimum
Front
4 in (100 mm) minimum
Sides
3 in (76 mm) minimum
Bottom
12 in (300 mm) minimum
STEP 2 Installing
Checking the Rating Plate
>
This boiler is configured
for Natural Gas from the
factory. If conversion to
Propane Gas is required,
the Propane Conversion
Kit supplied with the boiler
must be used.
WARNING
e
Before connecting the gas supply, determine the gas type and pressure for the boiler by
referring to the rating plate. Use only the same gas type indicated on the rating plate. Using a
different gas type will result in abnormal combustion and malfunction of the boiler. Gas
supplies should be connected by a licensed professional only.
e
The appliance and its gas connection must be leak tested before placing the appliance in
operation.
e
This boiler cannot be converted from natural gas to propane or vice versa without a Navien gas
conversion kit. Do not attempt a field conversion of this boiler without a Navien gas conversion
kit. Doing so will result in dangerous operating conditions and will void the warranty.
Navien Inc. is not liable for any property damage and/or personal injury resulting from
improper conversions.
Mounting on the Wall
>
CAUTION
Do not install the boiler on dry walls without proper reinforcement.
Drill in the supplied anchor bolts
after considering where the vent
termination will be located.
1
Lift up the boiler, rest the unit on the hooks
provided on the wall bracket on the wall.
Secure the mounting bracket to the wall
with the tapping screws and anchors.
2
Removing the Front Cover
>
Unclasp the 4 buckles that fix
the cover to the boiler, and then
remove the cover by lifting it
and pulling it outward.