Lochinvar LBN040G User Manual

Balanced Flue
Direct Vent
Residential Gas

Direct Vent / Sealed Combustion

Lochinvar’s Balanced Flue models are available in capacities of 30 & 40
gallons and feature a sealed combustion direct vent system. All models
meet or exceed the NAECA and ASHRAE Energy Efficiency Standards.
All models are FVIR compliant.

Standard Features

• Sealed Combustion / Direct Vent System - The co-axial vent rotates

360° providing installation flexibility. The concentric vent system draws

all combustion air from outside the building through the outer pipe and

exhausts the by-products of combustion through the inner pipe, of the

two-pipe system, directly outdoors. The reinforced seals surrounding the

combustion chamber and inner door prevent the ignition of flammable

vapors outside the water heater.

• Piezo Ignitor - provides easy pilot ignition with the push of a button.

• Low NOx Burner - This whisper quiet, 360° burner incorporates

aluminized steel into its die-formed design. The large burner diameter

transfers more heat, while providing clean and efficient combustion.

Satisfies local codes and emissions standards.

• Non-CFC Foam Insulation - Improved formulation provides uniform

tank coverage with a thick blanket of insulating foam. This non-CFC

polyurethane closed cell foam minimizes standby losses and maximizes

heat retention.

• Glass-Lined Steel Tank - The tank is automatically formed, rolled,

and welded to ensure a continuous seam for the glass lining. The durable

glass lining is fused to the interior of the tank at 1600°F to assure lasting

protection against rust and corrosion while providing clean, clear hot water.

• Magnesium Tank Saver Anode - High capacity anode rod provides

protection from the effects of electrolytic corrosion.

• Adjustable Thermostat - This accurate control provides an easy way

to reset water temperature for best economy. Automatic over-heat safety

device is standard.

• Heat Traps - Factory installed, minimizes heat loss through piping.

• Dielectric Nipples - Factory installed waterways protect the tank from

the corrosive action between dissimilar metals, while providing piping

convenience.

• Temperature & Pressure Relief Valve

• Brass Drain Valve

• 6 Year Limited Warranty*

(See warranty for details)

• 10 Year Extended Warranty Available

(In residential applications)

Water Heaters

* 3 year limited warranty on tank and 1 year limited warranty on Parts

when installed in commercial applications

All models include vent pipe and outside
vent cap as shown in the images.

Dimensions and Specifications

Optional Vent Kits

Kit Number Dimensions

DRH1145 4 - 8 ft
DRH1148 4-3/4”– 5-3/4”
DRH1149 6-1/2”– 9-1/4”
DRH 1150 14”– 24”

Note: Proper installation permits a maximum vertical

rise of 48” and a maximum horizontal run of 96”.

FOR EASE IN ORDERING

BY MODEL NUMBER

LB N 040 G

Natural Gas

Balanced Flue

NAECA Compliant

Gallon Capacity

This is a Balanced Flue, residential,

natural gas

40 gallon water heater.

Natural Gas LP Gas 1st
Model Gal. Btu/hr GPH @ Input GPH @ Hour Energy Vent Ship.
Number Cap. Input 90°F Rise Btu/hr 90°F Rise Gals. Factor A B C D E F Size* Wt.

LBN040G 40 38,000 41 36,000 39 65 0.59 49-3/4” 20” 31-1/4 63-1/4” 43-1/2” 15” 3”/ 5” 162
LBN050G 50 42,000 45 40,000 43 80 0.58 58-3/4” 20” 31 72-1/4” 52-1/4” 15” 3”/ 5” 181

Notes: Replace “N” with “L” for LP gas models. *Internal exhaust vent is 3” diameter
All LP models are equipped with a cast iron burner *External air intake is 5” diameter.
All gas connections are 1/2”.
All water connections are 3/4” NPT.
Performance data is based on manufacturer test results.

Certified for Potable Water and Space Heating Applications

This water heater is suitable for water heating and space heating.
Toxic chemicals, such as those used for boiler water treatment shall
NEVER be introduced into this system. This water heater may
NEVER be connected to any existing heating system or components
previously used with non-potable water heating appliances.

Lochinvar Corporation • 300 Maddox Simpson Pkwy • Lebanon, TN 37090 • 615-889-8900 / Fax: [phone]

www.Lochinvar.com

RBF-04 (Replaces RBF-03 4/09)

PDP-5M-4/11-Printed in U.S.A.