Navien NCB-250/150H Installation & Operation Manual

Combi-boiler
Combi-boiler
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"Nav•eN
STEP 1 Before Installing
Read the Installation & Operation
This product must be installed and serviced by a licensed plumber,
a licensed gas fitter, or a professional
not liable for any damages or defects resulting from improper
installation.
When applicable, the installation
Home Construction and Safety Standard, Title 24 CFR, Part 3280
and/or CAN/CSA Z240 MH Series, Mobile
WARNING
Follow all local codes and/or the most recent edition
Z223.1 /NFPA 54) in the USA, or the Natural Gas and Propane Installation
(CAN/CGA B149.1).
Safety
DO NOT install the boiler in areas with excessively high humidity.
STEP 2 Installing
n Unpacking
@ Mounting on the Wall
CAUTION
Do not install the boiler on dry walls without
Drill in the supplied anchor bolts after considering
where the vent termination will be located.
Secure the mounting bracket to the wall
2
with the tapping screws and anchors.
Manual before installing.
service technician. Navien is
must conform with Manufactured
Homes.
of the National Fuel Gas Code (ANSI
Code in Canada
Navien Combination Boiler
User's Information Manual,
Installation & Operation Manual
Wall mounting bracket
Tapping screws and anchors
Vent Termination Caps
Wall flanges
Propane Conversion Kit
High Altitude Conversion Kit
(Natural Gas Only)
Spare Parts
oo
Pressure Relief Valve (30PSl)
Outdoor Temperature Sensor and
Cable
proper reinforcement.
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" in the Installation & Operation
Manual.
Allowable minimum clearances
Clearance
Top
Top
Back
Side
Back
Front
Sides
Bottom
Front
Side
Bottom
2 Checking the Rating Plate
Rating Plate, *Plaque Signalétique
NSE
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
Unfasten the 4 latches
(2 at the top and 2 at the
bottom) to remove the front
cover and gain access to the
internal components.
Model
NCB-250/150H, 240/130H, 240/11 OH,
190/080H, 190/060H
27227 049
27227 049
Indoor Installation
9 in (229 mm) minimum
0.5 in (13 mm) minimum
4 in (100 mm) minimum
3 in (76 mm) minimum
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.