Lennox International Inc GWB9-050IH-2, GWB9-075IH-2 90 50/75/100 Series 2 Natural GAS

Page 6

BOILERS FOR USE AT HIGH ALTITUDE - UNITED STATES INSTALLATIONS

•Boilers (with exception of 90-75 propane (LP) product) are factory equipped for operation at altitudes ranging from 0-10,000 feet above sea level.

•No changes to factory settings are required for installa- tions from 0-5,000 feet above sea level.

•For altitudes from 5,000-10,000 feet above sea level gas manifold pressure needs to be adjusted based upon calorific (Btu) value of supply gas (contact local gas utility or distributor for this value).

•For specific settings refer to Table 2 for natural gas applications and Table 3, Page 7 for propane (LP) gas applications.

•Instructions on how to adjust gas manifold pressure settings see Figure 27 and Figure 28, Page 44.

Note 90-75 propane (LP) applications for 5,000 - 10,000 feet above sea level require orifice change as well as gas manifold pressure adjustment based upon calorific (Btu) value of supply gas.

Refer to Table 2 and Table 3 for high altitude orifice part number. For replacing orifice refer to specific instructions included with conversion kit.

Table 2 - 90 - 50/75/100 SERIES 2 NATURAL GAS

MODEL 90-50

 

Stock Factory

 

 

Btu Value of Natural Gas++

 

 

Settings

750

 

850

950

 

1000

1050

Altitude in Ft.

0-5,000

 

 

 

5,000-10,000

 

 

Normal Input (MBH)

50

–

 

–

–

 

–

–

Manifold Pressure In W.C.

2.5

4

 

4

3.5

 

2.5

2.5

Orifice

43331094

 

 

 

43331094

 

 

 

MODEL 90-75

 

 

 

 

 

 

Stock Factory

 

 

Btu Value of Natural Gas++

 

 

Settings

750

 

850

950

 

1000

1050

Altitude in Ft.

0-5,000

 

 

 

5,000-10,000

 

 

Normal Input (MBH)

75

–

 

–

–

 

–

–

Manifold Pressure In W.C.

2.5

3.5

 

3.5

2.5

 

2.5

2.5

Orifice

43331092

 

 

 

43331092

 

 

 

MODEL 90-100

 

 

 

 

 

 

Stock Factory

 

 

Btu Value of Natural Gas++

 

 

Settings

750

 

850

950

 

1000

1050

Altitude in Ft.

0-5,000

 

 

 

5,000-10,000

 

 

Normal Input (MBH)

100

–

 

–

–

 

–

–

Manifold Pressure In W.C.

2.5

3.5

 

3.5

2.5

 

2.5

2.5

Orifice

43331090

 

 

 

43331090

 

 

++Contact local gas utility or distributor for Btu value of gas.

6

Page 5 Page 7
Image 6
Page 5 Page 7
Contents Installation Instructions Boiler Dimensions Introduction IntroductionImportant Safety Information GeneralSEA Level Ratings Natural and Propane Gases Net Ahri Rating Shipping Flue DiameterBoilers for USE AT High Altitude United States Installations 90 50/75/100 Series 2 Natural GAS90 50/75 Series 2 Propane GAS 43331093 43331096Before Installing the Boiler Boiler SizingBoiler Location Considerations Combustion Air And Vent Pipe Requirements Boiler InstallationLocating The Boiler Extreme cold climate areas, use ¾ Armaflex or equivalentCondensate Drain Requirements Install boiler on level surfaceBoiler is not to be installed on carpeting Foundation RequirementsClean the System First Near Boiler PipingSupply And Return Lines Single Zone Boiler Piping Multi-Zone Systems Two Zone Boiler Piping With Zone ValvesTwo Zone Boiler Piping With Circulators Page Page Page Safety Relief Valve Expansion Tank And Make-Up WaterTerminate pipe with plain end not threaded Diaphragm Type Expansion Tank Piping Conventional Closed Type Expansion Tank Piping Filling Condensate Trap With Water Reinstall vent drain lineCondensate Drain Piping Chilled Water PipingExample Combustion AIR and Vent PipeConnections And Termination Elbow @ 3 ft. + 1 elbow @ 3 ft. = 6 equivalent ft. of pipeInstallation Boiler SizeVent AIR Intake Roof Vent / Intake TerminationsLess Than 12 Clearance Concentric Vent Terminations CombustionVent AirCombustion Air and Vent Piping Boiler Connections Feet minimum total equivalent length for all modelsCheck Gas Supply Connecting The Gas PipingGAS Supply Piping Leak Check Gas Piping445,000 Gas Pipe Sizes625,000 365,000Thermostat Installation Electrical WiringElectric Power Supply Connect Circulator Pump WiringWiring Schematic Ladder Wiring Diagram Page Ladder Diagram for Figure Controls and Accessories Draft Inducer Casting Temperature Safety SwitchDrain Valve Circulator PumpStart UP Operating Instructions To Turn Off Gas To ApplianceS9381A Integrated Boiler Control Operation and Adjustments User Parameters Adjusting SettingsDisplay State Code Definitions Sequence of Operation Check OUT Procedure and Adjustment Set Thermostat To Desired Room Temperature Review All InstructionsVR8205 Maintenance and Cleaning Annual Examination And Cleaning Of Boiler Components Igniter wires Gas valve wiresRemove draft inducer and gasket from top of flue connector Troubleshooting Initial Service ChecksError Codes Differential AIR Pressure Switch Check Boiler Differential PressureAluminum Series Clean System First Fill Water and ChemistryEliminate System Leaks General Guidelines When Using Antifreeze Antifreeze Products Installation and CHECK-OUT Certificate Boiler Model Serial # Date Installed Measured BTU/HR inputPage Lennox Industries Inc. Dallas, Texas
Related manuals
Manual 32 pages 41.03 Kb

GWB9-050IH-2, GWB9-100IH-2, GWB9-075IH-2, Gas-Fired Hot Water Boiler specifications

Lennox International Inc. is a prominent player in the HVAC industry, renowned for its innovative solutions and high-efficiency products. Among its standout offerings is the GWB8 Gas-Fired Hot Water Boiler, available in various models including GWB8-262E-2, GWB8-245E-2, GWB8-280E-2, and GWB8-299E-2. These units are designed to provide reliable and efficient heating solutions for residential applications.

One of the key features of the GWB8 series is its energy-efficient operation. These boilers are designed to achieve an AFUE (Annual Fuel Utilization Efficiency) rating of up to 84%, allowing homeowners to save on energy costs while reducing their environmental footprint. The product utilizes a cast-iron heat exchanger, which promotes optimal heat retention and distribution, ensuring consistent performance throughout the heating season.

The GWB8 series incorporates advanced technologies to enhance comfort and efficiency. A significant innovation is the use of a power venter system that facilitates venting through the sidewall of the home, providing installation flexibility while maintaining safety standards. Additionally, the boilers are equipped with a Honeywell integrated control for precise temperature management and modulating gas valve technology, which adjusts the gas flow to match the heating demand, further optimizing fuel consumption.

Another defining characteristic of the GWB8 models is their durable construction. Designed to withstand the rigors of heating applications, these models feature a robust, powder-painted steel cabinet that helps prevent rusting and corrosion. The access doors are insulated, contributing to overall efficiency while allowing easy maintenance and serviceability.

The GWB8 series is also designed with homeowner comfort in mind. The quiet operation of these boilers ensures that they blend into the living environment without disruptive noise, making them an ideal choice for residential settings. The models are compatible with various heating systems, including hydronic heating, making them versatile and reliable.

Overall, Lennox's GWB8 Gas-Fired Hot Water Boiler series is an excellent choice for homeowners seeking efficient, durable, and reliable heating solutions. With a combination of advanced technologies, energy-efficient performance, and practical features, these boilers set a high standard for residential heating systems in today's market.
Top Page Image Contents