Usesheetmetalshearstoremovethecutoutfromtheside ofthecabinetUsethetwoprovidedsheetmetalscrewsto. installthecutoutonthetopcaptocovertheoriginalflue

outletopeningSeefigure15. .

TheG50UH(X)seriesunitsareclassifiedasfan-assisted CategoryI furnaceswhenverticallyventedaccordingto

thelatesteditionof NationalFuelGasCode(NFPA54/

ANSI Z223.1 ) in the USA and the current standards of CSA B149 Natural Gas and Propane Installation Codes in Can- ada. A fan-assisted Category I furnace is an appliance equipped with an integral mechanical means to either draw or force combustion products through the combustion chamber and/or heat exchanger.

NOTE - Use these instructions as a guide. They do not su- persede local codes. This furnace must be vented accord- ing to all local codes these installation instructions, and the provided venting tables in these instructions

The venting tables in this manual were extracted from the National Fuel Gas Code (NFPA 54 / ANSI Z223.1 ) and are provided as a guide for proper vent installation. Proper ap- plication, termination, construction and location of vents must conform to local codes having jurisdiction. In the ab- sence d local codes, the NFGC serves as the defining doc- ument.

Refer to the tables and the venting information contained in these instructions to properly size and install the venting system.

klMPORTANT

kWARNING

VENT CONNECTION

VENT

PIPE

FURNACE

FLUE TRANSITIOF

COLLAR

FIGURE 16

Use self-drilling sheet metal screws or a mechanical fas- tener to firmly secure the vent pipe to the round collar of the

flue transition. If self-drilling screws are used to attach the vent pipe, it is recommended that three be used. Drive one self-drilling screw through the front and one through each side of the vent pipe and collar. See figure 16.

Install the first vent connector elbow at a minimum of six inches (152 mm) from the furnace vent outlet.

Venting Using a Masonry Chimney

The following additional requirements apply when a lined masonry chimney is used to vent this furnace.

Masonry chimneys used to vent Category I central fur- naces must be either tile-lined or lined with a listed metal

lining system or dedicated gas vent. Unlined masonry chimneys are prohibited. See figures 17 and 18 for com- mon venting.

A chimney with one or more sides exposed to the outside of the structure is considered to be an exterior chimney.

An exterior masonry chimney that is not tile-lined must be lined with B1 vent or a listed insulated flexible metal vent.

An exterior tileqined chimney that is sealed and capped may be lined with a listed uninsulated flexible metal vent.

If the existing chimney will not accommodate a B1 vent or

an insulated flexible vent pipe liner, either the chimney must be rebuilt to accommodate one of these liners or an

alternate approved venting method must be found. Insulation for the flexible vent pipe must be an encapsu- lated fiberglass sleeve recommended by the flexible vent pipe manufacturer. See figure 17.

G50UH units installed in upflow applications may be vented into a tile-lined masonry chimney without using a listed metal liner, provided that the optional masonry chim- ney vent adapter kit (18M79) is used. Instructions provided with the kit must be followed exactly.

DO NOT insulate the space between the liner and the chimney wall with puffed mica or any other loose gran- ular insulating material

Common Venting Using Metal-Lined Masonry Chimney

 

 

 

SEALED

 

 

 

/

T

MAX. LENGTH

 

 

 

-- SEE NOTE 1

 

 

 

BELOW.

II

 

 

 

 

 

 

II

CHIMNEYEXTERIORWITH

 

 

II

METAL

VE%OO.o%OTOR "

II

LINER

'1

 

 

 

 

__ .,J

PERMANENTLY

SEALED FIREPLACE

OPENING

NOTE 1 - Refer to the provided venting tables for installations in the USA and the venting tables in CSA B149 for installations Canada.

NOTE 2 - Either single-walledor double-walled vent connector may be used. Refer to the capacity requirements shown in the provided venting tables for installations in USA and the venting tames in current CSA B149 for installations in Canada.

FIGURE 17

Page 13

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Image 13
Lennox International Inc G50UH-36C-110 OutletopeningSeefigure15, Thelatesteditionof NationalFuelGasCodeNFPA54
Page 12 Page 14

G50UH-60D-155, G50UH-36B-090, G50UH-36A-070, G50UH-24A-045, G50UH-60D-135 specifications

Lennox International Inc is renowned for its high-quality heating, ventilation, and air conditioning (HVAC) solutions. Among its versatile product lineup are the G50UH series of gas furnaces, which exemplify efficiency and performance. These models, specifically the G50UH-24A-070, G50UH-24A-045, G50UH-36B-090, G50UH-36A-070, and G50UH-48C-135, offer a range of features tailored to meet varying residential heating demands.

One of the key features of the G50UH series is its energy efficiency. Many models in this lineup boast an impressive Annual Fuel Utilization Efficiency (AFUE) rating, which indicates their ability to convert fuel into usable heat efficiently. These high AFUE ratings can lead to significant savings on energy bills, making these furnaces a cost-effective choice for homeowners.

The G50UH series incorporates advanced technology, including multi-speed blowers that enhance comfort levels. This feature allows for better airflow control and can help maintain consistent temperatures throughout the home. The controlled airflow reduces temperature swings and ensures that every room benefits from the heating provided by the furnace.

Safety is paramount in Lennox designs, and the G50UH series is no exception. Each unit is equipped with safety features designed to protect both the furnace and the home. Dual certification ensures that the products meet stringent safety standards. Moreover, features like a self-diagnostic control board streamline maintenance, allowing homeowners to easily identify potential issues.

Another important characteristic of the G50UH series is its compact design, which is beneficial for homes with limited space. The units are designed to fit comfortably in various installation environments, from basements to utility rooms.

Durability is another hallmark of the G50UH furnaces. Constructed with quality materials, these units are designed for long-term reliability. This ensures that homeowners can enjoy the comfort of their heating systems without frequent repairs.

Lastly, Lennox provides extensive support and warranties, giving homeowners peace of mind associated with their purchase. With options tailored to meet diverse home heating needs, the Lennox G50UH series stands out in the HVAC market, combining efficiency, safety, and reliability in one impressive package.
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