Lennox International Inc
GWB9-100IH-2, GWB9-075IH-2, GWB9-050IH-2 Less Than 12 Clearance
Troubleshooting
Install
Error messages
Wiring Schematic
Connecting The Gas Piping
Dimension
Maintenance
Controls and Accessories
Clean the System First
Safety
Page 25
Figure 13 - Side Wall Vent / Intake terminations - Less Than 12” Clearance Above Grade
Less Than 12” Clearance
Figure 14 - Side Wall Vent/Intake Terminations - 12” Or More Clearance Above Grade
12” Or More Clearance
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Image 25
Page 24
Page 26
Contents
Installation Instructions
Boiler Dimensions
Introduction
Introduction
General
Important Safety Information
Net Ahri Rating Shipping Flue Diameter
SEA Level Ratings Natural and Propane Gases
90 50/75/100 Series 2 Natural GAS
Boilers for USE AT High Altitude United States Installations
43331093 43331096
90 50/75 Series 2 Propane GAS
Boiler Sizing
Before Installing the Boiler
Boiler Location Considerations
Locating The Boiler
Boiler Installation
Combustion Air And Vent Pipe Requirements
Extreme cold climate areas, use ¾ Armaflex or equivalent
Boiler is not to be installed on carpeting
Install boiler on level surface
Condensate Drain Requirements
Foundation Requirements
Near Boiler Piping
Clean the System First
Supply And Return Lines
Single Zone Boiler Piping
Two Zone Boiler Piping With Zone Valves
Multi-Zone Systems
Two Zone Boiler Piping With Circulators
Page
Page
Page
Expansion Tank And Make-Up Water
Safety Relief Valve
Terminate pipe with plain end not threaded
Diaphragm Type Expansion Tank Piping
Conventional Closed Type Expansion Tank Piping
Condensate Drain Piping
Reinstall vent drain line
Filling Condensate Trap With Water
Chilled Water Piping
Connections And Termination
Combustion AIR and Vent Pipe
Example
Elbow @ 3 ft. + 1 elbow @ 3 ft. = 6 equivalent ft. of pipe
Boiler Size
Installation
Roof Vent / Intake Terminations
Vent AIR Intake
Less Than 12 Clearance
CombustionVent Air
Concentric Vent Terminations
Feet minimum total equivalent length for all models
Combustion Air and Vent Piping Boiler Connections
GAS Supply Piping
Connecting The Gas Piping
Check Gas Supply
Leak Check Gas Piping
625,000
Gas Pipe Sizes
445,000
365,000
Electric Power Supply
Electrical Wiring
Thermostat Installation
Connect Circulator Pump Wiring
Wiring Schematic
Ladder Wiring Diagram
Page
Ladder Diagram for Figure
Controls and Accessories
Drain Valve
Casting Temperature Safety Switch
Draft Inducer
Circulator Pump
Start UP
To Turn Off Gas To Appliance
Operating Instructions
User Parameters Adjusting Settings
S9381A Integrated Boiler Control Operation and Adjustments
Display
State Code Definitions
Sequence of Operation
Check OUT Procedure and Adjustment
Review All Instructions
Set Thermostat To Desired Room Temperature
VR8205
Maintenance and Cleaning
Igniter wires Gas valve wires
Annual Examination And Cleaning Of Boiler Components
Remove draft inducer and gasket from top of flue connector
Initial Service Checks
Troubleshooting
Error Codes
Boiler Differential Pressure
Differential AIR Pressure Switch Check
Aluminum Series
Fill Water and Chemistry
Clean System First
Eliminate System Leaks
General Guidelines When Using Antifreeze
Antifreeze Products
Boiler Model Serial # Date Installed Measured BTU/HR input
Installation and CHECK-OUT Certificate
Page
Lennox Industries Inc. Dallas, Texas
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