SECTION 1: INTRODUCTION

The following terms are used throughout this manual to bring attention to the presence of potential hazards or to important information concerning the product:

DANGER: Indicates an imminently hazardous situation which, if not avoided, will result in death, serious injury or substantial property damage.

WARNING: Indicates a potentially hazardous situation which, if not avoided, could result in death, serious injury or substantial property damage.

CAUTION: Indicates a potentially hazardous situation which, if not avoided, may result in minor injury or property damage.

NOTE: Used to notify of special instructions on installa- tion, operation or maintenance which are important to equipment but not related to personal injury hazards.

CODE COMPLIANCE

Boiler installations must conform to the requirements of the authority having jurisdiction or, in the absence of such requirements, to the National Fuel Gas Code ANSI Z223.1- latest edition. Where required by the authority having jurisdic- tion, the installation must also conform to the American Society of Mechanical Engineers Code for "Controls and Safety Devices for Automatically Fired Boilers", ANSI/ASME CSD-1.

All electrical wiring must be in accordance with National Electric Code ANSI/NFPA No.70-latest edition and any additional state or local code requirements. If an external source is utilized, the boiler, when installed, must be electrically grounded in accordance with requirements of the authority having jurisdiction or, in the absence of such requirements, with the National Electrical Code, ANSI/NFPA No.70-latest edition. UL listed power limited circuit cable is almost universally approved for safety controls on heating equipment, either internally or externally, without protection of conduits or raceway.

VENTING REQUIREMENTS

When connecting to gas vents or chimneys, vent installations shall be in accordance with Part 7, Venting of Equipment, of the National Fuel Gas Code, ANSI Z223.1-latest edition, or applicable provisions of the local building codes.

Vent connectors serving appliances vented by natural draft shall not be connected into any portion of mechanical draft systems operating under positive pressure.

When two or more appliances vent into a common flue, the area of the common flue should be at least equal to the area of the largest flue plus 50% of the areas of the additional flue or vent connectors.

When existing boiler is removed from common venting sys- tem, common venting system is likely to be too large for proper venting of appliances remaining connected to it. At time of removal of existing boiler, the following steps shall be followed with each appliance remaining connected to the common venting system placed in operation, while other appliances remaining connected to the common venting system are not in operation:

1.Seal all unused openings in common venting system.

2.Visually inspect the venting system for proper size and horizontal pitch and determine there is no blockage or restriction, leakage, corrosion and other deficiencies which could cause an unsafe condition.

3.Insofar as is practical, close all building doors and win- dows and all doors between the space in which the appli- ances remaining connected to the common venting sys- tem are located and other spaces of the building. Turn on clothes dryers and any appliance not connected to the common venting system. Turn on any exhaust fans, such as range hoods and bathroom exhausts, so they will operate at maximum speed. Do not operate a summer exhaust fan. Close fireplace dampers.

4.Place in operation the appliance being inspected. Follow the lighting instructions. Adjust thermostat so appliance will operate continuously.

5.Test for spillage at draft hood relief opening after 5 min- utes of main burner operation. Use the flame of a match or candle, or smoke from cigarette, cigar or pipe.

6.After it has been determined that each appliance remain- ing connected to common venting system properly vents when tested as outlined above, return doors, windows, exhaust fans, fireplace dampers and any other gas-burn- ing appliance to previous conditions of use.

7.Any improper operation of the common venting system should be corrected so the installation conforms with National Fuel Gas Code, ANSI Z223.1-latest edition. When resizing any portion of the common venting sys- tem, the common venting system should be resized to approach the minimum size as determined using the appropriate tables in Appendix G in the National Fuel Gas Code, ANSI Z223.1-latest edition.

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