TERMINATION LOCATION AND CLEARANCES
Vent pipe and
??Flue gases can be corrosive. When sidewall venting, protect walls with a corrosion resistant material. Also, terminate away from plants and shrubs.
??Locate termination consistent with the National Fuel Gas Code, ANSI Z223.1/NFPA 54 or the CAN/CGA B149 Installation Codes.
??Locate termination away from other air intake or exhaust vents such as dryer vents, other gas appliance vents, or plumbing vents. Allow at least 3 foot to any other vent.
??Terminal must not be located above a walkway, driveway or within 10 feet of an adjacent building.
??Do not locate termination underneath a veranda, porch, or deck.
IN THE UNITED STATES:
??Allow a minimum clearance of 4 feet from electric meters, gas meters, regulators, and relief equipment.
??When
??When direct venting, vent terminal must be at least one foot from any opening through which flue gases could enter a building.
IN CANADA:
??Allow 6 feet clearance to any mechanical air supply or service regulator vent and 6 feet horizontally to any gas meter, electric meter, or relief device.
??Do not terminate above a meter/regulator assembly within 3 feet horizontally of the vertical center line of the regulator
??Do not terminate within one foot (3 feet for 108,000 and 126,000 Btu models) of a window or door that can be opened, a
EXISTING VENT CONSIDERATIONS
When a Category I furnace is removed or replaced, the old venting system may not be properly sized to vent the remaining appliance(s), for example, a gas water heater. An improperly sized venting system may promote the formation of condensate, leakage or spillage.
The following steps shall be followed with each appliance connected to the old venting system placed in operation, while any other appliances connected to the venting system are not in operation:
1.Seal any unused openings in the venting system;
2.Inspect the venting system for proper size and horizontal pitch, as required in the National Fuel Gas Code, ANSI Z223.1/NFPA 54 or the CAN/CGA B149 Installation Codes. Determine that there is no blockage or restriction, leakage, corrosion and other deficiencies which could cause an unsafe condition;
3.In so far as is practical, close all building doors and windows and all doors between space in which appliance(s) connected to the venting system are located and other spaces of building.
4.Close fireplace dampers.
5.Turn on clothes dryers and any appliance not connected to the venting system. Turn on any exhaust fans, such as range hoods and bathroom exhausts, so they shall operate at maximum speed. Do not operate a summer exhaust fan.
6.Follow the lighting instructions. Place the appliance being inspected in operation. Adjust thermostat so appliance shall operate continuously;
7.Test for drafthood equipped appliance spillage at the drafthood relief opening after 5 minutes of main burner operation. Use the flame of a match or candle;
8.After it has been determined that each appliance connected to the venting system properly vents when tested as outlined above, return doors, windows, exhaust fans, fireplace dampers and any other gas - burning appliance to their previous conditions of use;
9.If improper venting is observed during any of the above tests, the venting system must be corrected. Follow the National Fuel Gas Code, ANSI Z223.1/NFPA 54 or CAN/CGA B149 Installation Codes to correct improper vent operation. Any "common vent"
DIRECT OR NON-DIRECT VENTING?
This furnace may be installed using either direct venting or
A
Use direct venting when indoor air may be contaminated with chemicals such as chlorine, fluorine, bromine or iodine. When these chemicals are burned with natural gas or propane gas, acids are produced that may decrease heat exchanger life. You should also consider direct venting when furnace is installed in a space with limited combustion
and ventilation air. See “CONFINED SPACE
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