Lennox International Inc
GWB9-075IH-2, GWB9-100IH-2, GWB9-050IH-2 Ladder Wiring Diagram
Troubleshooting
Install
Error codes
Wiring Schematic
Connecting The Gas Piping
Dimension
Maintenance
Controls and Accessories
Clean the System First
Safety
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ELECTRICAL WIRING
Figure 21 - Ladder Wiring Diagram
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Image 32
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Contents
Installation Instructions
Boiler Dimensions
Introduction
Introduction
Important Safety Information
General
SEA Level Ratings Natural and Propane Gases
Net Ahri Rating Shipping Flue Diameter
Boilers for USE AT High Altitude United States Installations
90 50/75/100 Series 2 Natural GAS
90 50/75 Series 2 Propane GAS
43331093 43331096
Boiler Location Considerations
Before Installing the Boiler
Boiler Sizing
Boiler Installation
Locating The Boiler
Combustion Air And Vent Pipe Requirements
Extreme cold climate areas, use ¾ Armaflex or equivalent
Install boiler on level surface
Boiler is not to be installed on carpeting
Condensate Drain Requirements
Foundation Requirements
Supply And Return Lines
Clean the System First
Near Boiler Piping
Single Zone Boiler Piping
Multi-Zone Systems
Two Zone Boiler Piping With Zone Valves
Two Zone Boiler Piping With Circulators
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Terminate pipe with plain end not threaded
Safety Relief Valve
Expansion Tank And Make-Up Water
Diaphragm Type Expansion Tank Piping
Conventional Closed Type Expansion Tank Piping
Reinstall vent drain line
Condensate Drain Piping
Filling Condensate Trap With Water
Chilled Water Piping
Combustion AIR and Vent Pipe
Connections And Termination
Example
Elbow @ 3 ft. + 1 elbow @ 3 ft. = 6 equivalent ft. of pipe
Installation
Boiler Size
Vent AIR Intake
Roof Vent / Intake Terminations
Less Than 12 Clearance
Concentric Vent Terminations
CombustionVent Air
Combustion Air and Vent Piping Boiler Connections
Feet minimum total equivalent length for all models
Connecting The Gas Piping
GAS Supply Piping
Check Gas Supply
Leak Check Gas Piping
Gas Pipe Sizes
625,000
445,000
365,000
Electrical Wiring
Electric Power Supply
Thermostat Installation
Connect Circulator Pump Wiring
Wiring Schematic
Ladder Wiring Diagram
Page
Ladder Diagram for Figure
Controls and Accessories
Casting Temperature Safety Switch
Drain Valve
Draft Inducer
Circulator Pump
Start UP
Operating Instructions
To Turn Off Gas To Appliance
Display
S9381A Integrated Boiler Control Operation and Adjustments
User Parameters Adjusting Settings
State Code Definitions
Sequence of Operation
Check OUT Procedure and Adjustment
Set Thermostat To Desired Room Temperature
Review All Instructions
VR8205
Maintenance and Cleaning
Remove draft inducer and gasket from top of flue connector
Annual Examination And Cleaning Of Boiler Components
Igniter wires Gas valve wires
Troubleshooting
Initial Service Checks
Error Codes
Differential AIR Pressure Switch Check
Boiler Differential Pressure
Aluminum Series
Eliminate System Leaks
Clean System First
Fill Water and Chemistry
General Guidelines When Using Antifreeze
Antifreeze Products
Installation and CHECK-OUT Certificate
Boiler Model Serial # Date Installed Measured BTU/HR input
Page
Lennox Industries Inc. Dallas, Texas
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