Raypak Hi Delta 992B-1262B Installation & Operating Instructions Manual

Also see for HI DELTA 1262B: Specification sheet Installation & operating instructions Specifications Installation & operating instructions Brochure & specs

32For installations in extremely cold climate, it is re-quired that:1. The vent must be installed with a slight upwardslope of not more than 1/4 inch per foot of hori-zontal run to the vent terminal. In this case, anapproved condensate trap must be installed perapplicable codes.2. The intake vent must be insulated through thelength of the horizontal run.TerminationThe flue direct vent cap MUST be mounted on the ex-terior of the building. The direct vent cap cannot beinstalled in a well or below grade. The direct vent capmust be installed at least 1 ft above ground level andabove normal snow levels.The direct vent cap MUST NOT be installed with anycombustion air inlet directly above a direct vent cap.This vertical spacing would allow the flue productsfrom the direct vent cap to be pulled into the combus-tion air intake installed above.This type of installation can cause non-warrantableproblems with components and poor operation of theheater due to the recirculation of flue products. Multi-ple direct vent caps should be installed in the samehorizontal plane with a 4 ft clearance from the side ofone vent cap to the side of the adjacent vent cap(s).Combustion air supplied from outdoors must be free ofparticulate and chemical contaminants. To avoid ablocked flue condition, keep the vent cap clear ofsnow, ice, leaves, debris, etc.The stainless steel flue direct vent cap must be fur-nished by the heater manufacturer in accordance withits listing (sales order option D-15).Use only the special gas vent pipes listed for use withCategory III gas burning heaters, such as the AL29-4Cstainless steel vents offered by Heat Fab Inc. (800-772-0739), Protech System, Inc. (800-766-3473),Z-Flex (800-654-5600) or American Metal Products(800-423-4270). Pipe joints must be positively sealed.Follow carefully the vent manufacturer’s installationinstructions.WARNING: No substitutions of flue pipe or ventcap material are allowed. Such substitutions wouldjeopardize the safety and health of inhabitants.Direct Vent - VerticalInstallationThese installations utilize the heater-mounted blowerto draw combustion air from outdoors and force theheated flue products through the vent pipe under posi-tive pressure. The vent material must be inaccordance with the above instructions for vent mate-rials. Vent material must be listed by a nationallyrecognized test agency.The connection from the appliance flue to the stackmust be as direct as possible and should be the samesize or larger than the vent outlet.See Table K for Category I venting guidelines.It is recommended that in colder climates, the intakevent be insulated.TerminationThe flue terminal should be vertical and should termi-nate outside the building at least 2 ft above the highestpoint of the roof within 10 ft. The vent cap should havea minimum clearance of 4 ft horizontally from and in nocase above or below (unless a 4 ft horizontal distanceis maintained) electric meters, gas meters, regulatorsand relief equipment. The distance of the vent terminalfrom adjacent public walkways, adjacent buildings,open windows and building openings must be consis-tent with the NFGC (U.S.) or B149 (Canada).Note: When vertical height exceeds 25 ft, consultfactory prior to installation.Fig. 30: Direct Vent - Vertical