Navien NFB-175 Quick Installation Manual

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.
STEP 2 Installing
Unpacking

Navien
Condensing
Boiler
Wall Flanges
Tapping screws
and anchors
Air Vent
Bushing
3 1
( / in to / in)
4 2
System Temperature Sensor
Mounting on the Wall

CAUTION
Do not install the boiler on dry walls without proper reinforcement.
Drill in the supplied anchor bolts
1
after considering where the vent
termination will be located.
Secure the mounting bracket to the wall
2
with the tapping screws and anchors.
Quick Installation Guide
User's Information
Manual, Installation Air Vent
& Operation Manual
Wall Mounting
Conversion Kit
Bracket
Pressure Relief Valve, Vent Termination
Heating Caps
Outdoor
Temperature Sensor Condensate Trap
and Cable
Lift up the boiler, rest the unit on the hooks
provided on the wall bracket on the wall.
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
Checking the Rating Plate

WARNING
· 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.
· The appliance and its gas connection must be leak tested before placing the appliance in
operation.
· 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.
Removing the Front Cover

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Unclasp the 4 buckles that fix
the cover to the boiler, and then
remove the cover by lifting it
and pulling it outward
1
Model
NFB-175/200
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
This boiler is configured
for Natural Gas from the
factory. If conversion to
Propane Gas in required,
the conversion kit supplied
with the boiler must be
used.
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2
3