1)The heater must be provided with adequate supply of air for proper combustion and ventilation in accordance with the latest edition of the National Fuel Gas Code, ANSI Z223.1, or applicable provi sions of the local building codes.
2)When the heater is installed in a confined space where all air is supplied from inside the building, the heater room must be provided with two openings, each one having a minimum net free area, in square inches as follows:
Model | Sq. In. Of Free Area |
260 | 264 |
330 | 333 |
400 | 399 |
One opening shall be within 12 inches of the top, and the other opening within 12 inches of the floor. If additional gas appliances are installed in the same space, the total input of all gas appliances installed in the same space, must be considered in the calculation. Refer to Sec.
5.3.5of the latest edition of the National Fuel Gas Code for additional requirements.
NOTE: If louvers, grills or screens are used on the openings, obtain the net free area from their supplier or manufacturer. If the design free area of a louver is not known nor available, it shall be assumed that wood louvers will have
3.If the heater room is located against an outside wall and air openings can communicate directly with the outdoors, the two openings on the out side wall must each have a net free area, in square inches as follows:
Model | Sq. In. Of Free Area |
260/261 | 66 |
330/331 | 84 |
400/401 | 100 |
Location of the openings is the same as in the previous case - that is, within 12 inches of the top, and within 12 inches of the bottom of the enclosure. If horizontal ducts are used, the area must be doubled and the duct area shall not be less than the area of the openings they connect, and in no case shall the smallest dimension be less than 3 inches.
OUTDOORMODELS
Heaters must not be installed under an overhang of less than three (3) feet from the top on the heater. Three
(3)sides must be open in the area under the overhang. Roof water drainage must be diverted away from the heater installed under overhangs with the use of gutters.
The point from where the flue products exit the heater must be a minimum of four (4) feet below, four (4) feet horizontally from or one (1) foot above any door, window or gravity inlet to a building. The top surface of the heater shall be at least three (3) feet above any forced air inlet, or intake ducts located within ten (10) feet horizontally.
In areas where high winds are frequent, it may be necessary to locate the heater a minimum of 3' from high vertical walls, or install a wind break so the heater is not in direct wind current.
VENTING CONNECTIONS (Outdoor Models)
Outdoor vent top is shipped separately and must be installed on site.
MODELS
Step 1: Insert screw retainer clip over mounting flange, (4 places).
Fig. #8280.1
Step 2: Attach mounting angles to heater jacket with 1/2" sheetmetal screws, (4 places).
Fig. #8281.1
Step 3: Lower outdoor top to heater and secure with 1" sheetmetal screws.
LONG SIDE OF MOUNTING
ANGLE LOCATED AS SHOWN
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