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Hersteller: Gas-Fired Products Dateigröße: 1.33 mb Dateiname: Unterrichtssprache:

All common vent pipe should be double wall, Type B vent. 3. Avoid unnecessary bends. Limit to two (2) 90° elbows. 4. The entire length of vent connector shall be readily accessible for inspection, cleaning and replacement. 5. Groups of heaters with a common vent must be controlled by a common thermostat. AWARNING: COMMON VENTING OF MULTIPLE HEATERS IN CONFINED SPACES IS PROHIBITED. If any heater connected to a common vent system for multiple heaters Is found Inoperative, the heater should be disconnected from the vent system and its entrance into the vent system capped. B. INDIRECT VENTING (UNVENTED HEATERS) — This heater requires ventilation in the building to dilute the products of combustion and provide fresh air for efficient combustion. Where unvented heaters are used, gravity or mechanical means shall be provided to supply and exhaust at least 4 CFM per 1,000 Btu/hr input of installed heaters. Exhaust vents must be located at the highest point above and in the vicinity of the heaters, and the inlet vents must be located below the level of the heaters. An exhaust hood (Part #42924040 for LTS40-75 or Part #42924000 for LTS/LTU80-175) must be placed directly on the flue pipe starting collar (4” starting collar for LTS40-75 or 4"x6” starting collar for LTS/LTU80-175) when used unvented and must be mounted only In an upright position and directed towards the reflector body. BASIC FLUE VENTING Vent Cap (Leslie VersaCap Type B) 2 ft Minimum (when no wall or pa repet exists) Seal Joint and Annular Space Vertical Through the Roof 2” Clearance Thimble Vent Cap (Breldert or equivalent Type L) 1/4" per ft. rise toward vent terminal Horizontal Through Sidewall MULTIPLE HEATER VENTING (Connections into a Manifold) 6" diameter* . Vent Connector *4" diameter for LTS40-75 Total Vent Height (5 ft. Minimum) SINGLE HEATER VENTING MULTIPLE HEATER VENTING (Connections into a Common Vent) VENT SIZING TABLE Number of Heaters 1 2 3 4 5 LTS/LTU 40- 50 4” 4’ 5" 5” 6” LTS/LTU 60- 75 4" 5” 6” 6” 7” LTS/LTU 80-100 6” 6' 6” 7’ 8” LTS/LTU 110-130 6” 6’ 7" 8” 9” LTS/LTU 140-175 6” 8” 8” 9’ 10” THE FOLLOWING ILLUSTRATIONS AND TABLE OF VENT SIZES FOR COMMON VENTING OF MULTIPLE HEATERS ARE IN ACCORDANCE WITH THE NATIONAL FUEL GAS CODE ANSI Z223.1-LATEST EDITION, NFPA #54-LATEST EDITION, EQUIPMENT VOLUME OF 1988 ASHRAE HANDBOOK, CURRENT CAN/CGA-B149.1/2-M86 INSTALLATION CODE, AND AGA PUBUCATION NO. 10M5.85 2.5-2 ON FUNDAMENTALS OF GAS APPLIANCE VENTING AND VENTILATION-REVISED BUT ARE NOT A PART OF THE CSA CERTIFICATION. Form #43155010 Feb-04 COMMON VENT DIAMETER NOTE: If a size is not available use the next larger size. -15- 24) AIR FOR COMBUSTION If indoor combustion air is to be supplied for a tightly enclosed area, one square inch of free area opening shall be provided below the heater for each 1,000 Btu/hr of heater input. Adequate clearances round the perforated fresh air plate must be maintained at all times. In larger open areas o...

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