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is wired for 120 volts, single phase, 60 hertz. The total operating amperage is indicated on the rating name- plate. The 1000 series require less than 9 amps; the 1500 and 2000 series less than 12 amps. Before start- ing the boiler, check to ensure that the proper voltage and amperage are connected to the boiler.
An external electrical disconnect (not supplied with the boiler) with adequate overload protection is re- quired. The boiler must be grounded in accordance with local codes or in the absence of such require- ments, in the U.S. with National Electrical Codes, ANSI/NFPA No. 70 latest edition and in Canada, wire according to the current Canadian Electrical Code.
Note: A dedicated earth ground (green wire) is re- quired to avoid nuisance shutdowns. Do not ground through the conduit. It is also important that proper polarity be maintained.
3.5COMBUSTION AIR
Combustion air must be free from dust, lint, etc. The presence of such materials in the air supplied to the burner could cause nuisance "Low Air" shutdowns or premature burner failure. The boiler should not be operated during construction while the possibility of drywall dust, demolition dust, etc. exists.
Provisions for combustion and ventilation air must be in accordance with Section 5.3, Air for Combustion and Ventilation, of the National Fuel Gas Code, ANSI Z223.1, latest edition, or applicable provisions of the local building codes. In Canada, combustion air open- ings shall comply with CSA 4.9. The formula is "1 sq. in. per 1,000 Btu/hr of gas input not less than 100 sq. in." The location shall be "neither more than 18," nor less than 6" above the floor level."
The boiler room shall be provided with two openings to ensure adequate combustion air and proper ventila- tion. One opening should be 6 to 12 inches above the floor and the other 6 to 12 inches below the ceiling, preferably on opposite walls. The size of each open- ing is determined by whether air is taken from inside or outside the building. In Canada, ventilation air openings shall be at least 10% of the cross sectional area required for combustion air, but not less than 10 square inches. It is to be located at the highest practi- cal point communicating with outdoors.
If air is taken directly from outside the building, each opening should have a net free area of 1 square inch for each 4,000 Btu per hour of total boiler input. For instance, 300 square inches
When air is taken from the outdoors through a vertical duct, 1 square inch per 4,000 Btu per hour is required. If a horizontal duct is used, 1 square inch per 2,000 Btu per hour is required, i.e., 600 square inches for 1,200,000 Btu per hour input.
If air is taken from another interior space, each open- ing should have a net free area of 1 square inch for each 1,000 Btu per hour of boiler input (1,200 square inches for a 1,200,000 Btu per hour.)
WARNING!
Under no circumstances shall the boiler room ever be under a negative pressure. Particular care should be taken when exhaust fans, compressors,
The combustion air supply must be completely free of chemical fumes which may be corrosive when burned in the boiler. Common chemicals which must be avoided are fluorocarbons and other halogenated com- pounds, most commonly present as refrigerants or sol- vents, such as freon, trichlorethylene, perchlorethyl- ene, chlorine, etc. These chemicals, when burned, form acids which quickly attack the boiler tubes, tube sheets, flue collectors and the boiler stack. The result is improper combustion and premature boiler failure.
3.6FLUE VENTING
This boiler requires a special vent system. Vent instal- lations shall be in accordance with Part 7, Venting of Equipment, of the National Fuel Gas Code, ANSI Z223.1, CSA B149 code or applicable provisions of the local building codes.
This boiler is Category II as it is defined in ANSI Z21.13/CSA 4.9 latest edition. The vent material must be listed Category II Vent pipe (316L or
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