Raypak 1005 operating instructions Vent Terminal Location, Installations

Combustion

Air Supply

Exhaust

Configuration

Heater Venting

Category

Certified Materials

Combustion Air

Inlet Material

			Vertical
		From Inside Building	Venting
		(Non-Direct Venting)	Horizontal Through-				CAT IV
			the-Wall Venting		IV
							AL29-4C
			Vertical					Galvanized Steel
		From Outside Building	Venting						PVC
		(Direct Venting)	Horizontal Through-						ABS
									CPVC
			the-Wall Venting
			Table L: Venting	Category Requirements
from combustible materials. Use insulated vent pipe					8.	Locate and guard vent termination to prevent acci-
spacers where the vent passes through combustible						dental contact by people or pets.
roofs and walls.					9.	DO NOT terminate vent in window well, stairwell,
Vent Terminal Location
					10.	alcove, courtyard or other recessed area.
1. Condensate can freeze on the vent cap. Frozen						DO NOT terminate above any door, window, or
						gravity air intake. Condensate can freeze, causing
	condensate on the vent cap can result in a blocked					ice formations.
	flue condition.				11.	Locate or guard vent to prevent condensate from
NOTE: During winter months check the vent cap						damaging exterior finishes. Use a rust-resistant
and make sure no blockage occurs from build-up of						sheet metal backing plate against brick or mason-
snow or ice.						ry surfaces.
					12.	DO NOT extend exposed vent pipe outside of
2. Give special attention to the location of the vent
						building beyond the minimum distance required
	termination to avoid possibility of property dam-					for the vent termination. Condensate could freeze
	age or personal injury.					and block vent pipe.
3. Gases may form a white vapor plume in winter.					U.S. Installations
	The plume could obstruct a window view if the ter-
	mination is installed near windows.				Refer to the latest edition of the National Fuel Gas
4. Prevailing winds, in combination with below-freez-					Code.
	ing temperatures, can cause freezing of				Vent termination requirements are as follows:
	condensate and water/ice build-up on buildings,
	plants or roofs.				1.	Vent must terminate at least 4 ft below or 4 ft hori-
5. The bottom of the vent terminal and the air intake						zontally from any door, window or gravity air inlet
						to the building.
	shall be located at least 12 in. above grade, includ-				2.
	ing normal snow line.					The vent must not be less than 7 ft above grade
6.	Un-insulated single-wall Category IV metal vent				3.	when located adjacent to public walkways.
	pipe shall not be used outdoors in cold climates for					Terminate vent at least 3 ft above any forced air
	venting gas-fired equipment without insulation.					inlet located within 10 ft.
7.	Through-the-wall vents for Category IV appli-				4.	Vent must terminate at least 4 ft horizontally, and
	ances shall not terminate over public walkways or					in no case above or below unless 4 ft horizontal
	over an area where condensate or vapor could					distance is maintained, from electric meters, gas
	create a nuisance or hazard or could be detrimen-					meters, regulators, and relief equipment.
	tal to the operation of regulators, relief valves, or
	other equipment.

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