Lennox International Inc G50UH-36A-070, G50UH-48C-110, G50UH-60D-135 27-5/8, Side View Front View

Page 9

Return Air -- Upflow Applications

Return air can be brought in through the bottom or either side of the furnace installed in an upflow application. If the furnace is installed on a platform with bottom return, make an airtight seal between the bottom of the furnace and the platform to ensure that the furnace operates properly and safely. The furnace is equipped with a removable bottom panel to facilitate installation,

Markings are provided on both sides of the furnace cabinet for installations that require side return air. Cut the furnace cabinet at the maximum dimensions shown on page 2.

NOTE - When air volumes over 1800 cfm (850 L/s) are

required with 60C or 60D models in an upflow applica-

tion, the following return air options are available:

1 - Return air from single side with transition which will accommodate 20 x 25 x 1 in. (508 x 635 x 25 mm) clean- able air filter. (Required to maintain proper air velocity.) See figure 7.

2 - Return air from single side with optional RAB Return Air Base. See figure 8.

3 - Return air from bottom.

4 - Return air from both sides.

5 - Return air from bottom and one side.

Refer to Engineering Handbook for additional information.

Side Return Air (with transition and filter)

20" X 25" X 1"

(508mm X635mm X 25mm)

Cleanable Filter

_/

Return Air

Plenum

Transition

FIGURE 7

Optional Return Air Base

(Upflow Applications Only -- For use with B, C and D cabinets only)

J

I

©

r

14

41

(102)1"9_-

123(584)

fL_-

Overall

1 MinimuV_

 

 

 

 

(Maximum)

11 (279)

1 22-7-16

 

 

 

 

 

2 Maximurr

AIR FLOW

 

 

 

 

 

 

(570)

 

L

 

1 Unit Openingsidereturn air

11_5.6) __ j

Overall

 

 

 

 

 

Maximum)

 

 

7-1/4 (184)

 

5 -5/8

 

_2

 

 

 

(143)

 

 

 

 

 

 

 

 

OPTIONAL RAB

 

.....................23 (584)

!

--

3/4

 

 

 

 

 

 

 

 

 

 

 

(19)

17-1/2 (446) RAB-B

(98M60)

RETURN AIR BASE

 

 

 

 

21 (533) RAB-C

(98M58)

7/8

_1--

27-5/8 (702)

 

 

 

24-1/2 (622) RAB-D

(98M59)

(22)

 

SIDE VIEW

 

 

 

 

 

 

 

 

FRONT VIEW

NOTE- Optional Side Return Air Filter Kits are not for use with RAB Return Air Base.

1 Both the unit return air opening and the base return air opening must be covered by a single plenum or IAQ cabinet. Minimum unit side return air opening dimensions for units requiring 1800 cfm or more of air (W x H): 23 x 11 in.

(584 x 279 mm).

The opening can be cut as needed to accommodate plenum or IAQ cabinet while maintaining dimensions shown. Side return air openings must be cut in the field. There are cutting guides stenciled on the cabinet for the side return air opening. The size of the opening must not extend beyond the markings on the furnace cabinet..

2 To minimize pressure drop, the largest opening height possible (up to 14 inches) is preferred. NOTE- Optional Side Return Air Filter Kits are not for use with RAB Return Air Base.

FIGURE 8

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Contents G50UHX Series Supply AIR FlueBoxGasket HeatExchanger FlueCollectorBox Gasket FlueTransitionPackage 1 of 1 contains Wheninstalled,thisfurnacemustbeelectricallygrounded Acaution Canada,referto the standardCSAB149installation codesAir from Inside WiTER/ RoomEquipment in Confined Space ALL AIR from Outside Mm at unit front. The unit must be levelSide View Front View 27-5/8Removingthe Bottom Panel Leveling Bolt Installation Inches mmRemoving the Bottom Panel Leveling an Upflow UnitHorizontal Application Unit Installed on Platform Supply Air Plenum Filter SizeCombustion Air Inducer HoleOutletopeningSeefigure15 Venting Using a Masonry ChimneyThelatesteditionof NationalFuelGasCodeNFPA54 Vent ConnectionCombined Vent Connector Common Venting Using Tile-Lined Interior Masonry ChimneSingle appliance Minimum Vent capacityMaximum Horizontal Inches mm MIN MAX Serving a Single Category I Appliance Serving Two or More Category I Appliances Type B Double-WallVents with Type B Double-Wall ConnectorsRemoval of the Furnace from Common Vent VentGas Pipe Capacity ft3/hr m3/hr PropaneInstallationCodesinCanadaInterior MAKE-UP BOX Installation Precautions and ProceduresLeak Check Electrostatic Discharge ESDINTERIORMAKE-UP BOX Installation PowER @1HsuN,TZk for Correct Number of Secondary Typical G50UHX Field Wiring DiagramSot G5OUHXManifold For Your Safety Read Before LightingRevolution Honeywell VR8205 Gas Valve with ON/OFF SwitchPrimary and Secondary Limits FlueAnd Chimney CheckunitforproperdraftG50UHX Burner & Heat Exchanger Removal Ak Caution Diagnostic Surelight Control Normal Heating Mode Abnormal Heating ModeYESl =-lYESl Normalcooling Mode Abnormalcooling ModeYEs FurnaceBtuInput BlowerMotorAmps

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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