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Lennox COWB2

Lennox COWB2
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RETAIN THESE INSTRUCTIONS FOR
FUTURE REFERENCE
These instructions must be
afxed on or adjacent to the boiler.
COWB2
Oil Fired BOiler
INSTALLATION
INSTRUCTIONS
PRODUCT LITERATURE
Lennox Industries Inc.
Dallas, Texas
BOILERS 456,983M
OIL FIRED BOILERS
These boilers are low pressure, sectional cast
iron boilers constructed and hydrostatically
tested for a maximum working pressure of psi
in accordance with A.S.M.E. (American society
of Mechanical Engineers) Section IV Standards
for cast iron heating boilers. They are capacity
rated in accordance with the code of the I=B=R
(Hydronics Institute).
H
P/N# 14683456, Rev. 1.2 [07/05]

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Lennox COWB2 Specifications

General IconGeneral
BrandLennox
ModelCOWB2
CategoryBoiler
LanguageEnglish

Summary

Installation Instructions

Oil Fired Boilers

Provides a description of the oil-fired boiler type and its general characteristics.

Introduction

Boiler Ratings and Capacities

Rules for Safe Installation and Operation

Before You Start

Locating the Boiler

Provides guidance on selecting an appropriate location and maintaining required clearances.

Installation Requirements

Fresh Air for Combustion

Air Openings for Boiler Located in Confined Space

Details ventilation requirements, including specific opening sizes for confined installation spaces.

System Piping

System Piping Arrangement Zoning with Zone Valves

System Piping Arrangement Zoning with Circulators

System Piping Arrangement Alternate Near Boiler Piping

Chimney and Chimney Connections

Recommended Minimum Chimney Sizes

Provides recommended minimum sizes for chimney liners based on firing rate.

Chimney Connector and Draft Regulator

Explains the installation and function of the chimney connector and draft regulator.

Electrical Connections

Thermostat

Instructions for installing and locating the thermostat for optimal system operation.

Grounding

Details the safety requirements for properly grounding the boiler unit.

Electric Power Supply

Guidance on connecting the primary 115-volt electrical power supply to the boiler.

Oil Burner Wiring

Wiring information specific to the oil burner and its associated controls.

Equipment and Optional Accessories

Relief Valve (provided)

Explains the function, testing, and discharge piping for the provided relief valve.

Conventional Expansion Tank (not provided)

Details the role and installation requirements for conventional expansion tanks.

Diaphragm Expansion Tank (not provided)

Details the role and installation requirements for diaphragm-type expansion tanks.

Equipment and Optional Accessories

Main Air Vent: for down flow systems or diaphragm type expansion tanks (not provided)

Information on installing main air vents for specific system types.

Automatic Fill Valve (not provided)

Describes the function and installation of automatic fill valves for system water supply.

Burner Solenoid Valve (provided)

Explains the operation of the solenoid valve for controlling oil flow to the burner.

Aquastat Relay Control (provided)

Details the aquastat relay control for managing boiler water temperature limits.

Drain Valve (provided)

Describes the purpose and installation of the manual drain valve.

Circulator (provided)

Information on the circulator pump, its function, and connection in the system.

Filling the Boiler

How a Hot Water System Operates

Explains the fundamental operational principle of a hot water heating system.

Filling the System with Water

Outlines two methods for filling and purging air from the heating system.

Operating the Boiler

Fuel Units and Oil Lines

Covers the installation and requirements for fuel units and oil supply lines.

Air Supply for Combustion

Details the critical importance and methods for ensuring sufficient air for combustion.

Draft Regulators

Explains the role and adjustment procedures for draft regulators in the system.

Operating the Boiler

Nozzles and Electrodes

Instructions for installing and setting the oil burner's nozzles and electrodes.

Final Burner Adjustments

Guidance on making final adjustments to the burner using combustion test instruments.

Oil Burner Maintenance

Outlines the recommended annual preventative maintenance tasks for the oil burner.

Operating the Boiler

Beckett AFG Burner Electrode Adjustments Variable (V1) Heads

Details electrode gap settings for Beckett AFG Variable (V1) head models.

Beckett AFG Variable (V1) Head Adjustments and Settings

Provides specific adjustment and setting information for the Beckett AFG V1 head.

Beckett AFG Burner Electrode Adjustments F-Heads

Details electrode gap settings for Beckett AFG F-Head models.

Checking and Adjusting Controls

Adjust Operating Controls

Guidance on setting the high limit, low limit, and differential for aquastat controls.

Adjust Thermostat Heat Anticipator to: 0.2 Amps

Instructions for adjusting the thermostat's heat anticipator setting.

Check Thermostat Operation

Procedures for verifying the correct operation and response of the thermostat.

Maintenance

Annually

Details the annual checks and services recommended for the boiler system.

Vent Pipe

Guidance on inspecting and maintaining the boiler's vent pipe for safety and efficiency.

Relief Valve

Instructions for testing and maintaining the boiler's safety relief valve.

Conventional Expansion Tank

Maintenance recommendations for conventional type expansion tanks.

Diaphragm Expansion Tank

Maintenance recommendations for diaphragm type expansion tanks.

Water System

Advice on draining the water system to prevent freezing damage.

Tankless Coil (or Cover Plate) Gasket

Procedure for checking and replacing the tankless coil or cover plate gasket.

Oil Burner

References maintenance procedures for the oil burner.

Oil Boiler Burner Cleaning Instructions

Oil Boiler Cleaning

Step-by-step guide for cleaning the internal components of the oil boiler.

Oil Burner Cleaning

Service Hints

For Your Safety

Provides immediate safety actions to take if a gas leak is detected.

If Your System Is Not Heating or Not Giving Enough Heat...

Guides users through troubleshooting common heating system performance issues.

If Burner Is Noisy...

Troubleshooting steps for diagnosing and resolving burner noise.

Relief Valve Leaking...

Provides steps for addressing issues related to a leaking relief valve.

Electrical Wiring

Boiler with Tankless Coil and Honeywell L8124 C Aquastat Control (Beckett AFG Burner Shown)

Wiring diagram for boilers equipped with a tankless coil and L8124C aquastat.

Boiler Without Tankless Coil and Honeywell L8148 A Aquastat Control (Beckett AFG Burner Shown)

Wiring diagram for boilers without a tankless coil and L8148A aquastat.

Sequence of Operations

Boiler with Tankless Coil:

Details the operational sequence for boilers featuring a tankless coil.

Sequence of Operations

Boiler Less Tankless Coil:

Details the operational sequence for boilers not equipped with a tankless coil.

Repair Parts

Beckett Oil Burner, Nozzle, and Air Setting

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