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

13three or four sheet metal screws (not supplied) equal-ly distributed around the circumference of the duct. Allducting should be self-supported. The filter housing isnot designed to support the air duct.TruSeal™ Combustion AirIn certain applications it may be necessary to utilizethe TruSeal option (sales order option D-21 or D-22)and duct the combustion air directly to the blower.Combustion air may be ducted directly to the heater byusing PVC, CPVC or sealed single-wall galvanizedducting. The duct will attach directly to the air collar lo-cated on the side of the heater, using three or foursheet metal screws (not supplied) equally positionedaround the circumference of the duct. The screws andduct connection point must be sealed with RTV (notsupplied). An in-line intake air filter kit (sales orderoption D-17) must be installed in the combustion airduct. TruSeal is generally used when damaging con-taminants are present in the mechanical room.TruSeal heater connection points are available as fol-lows:992B to 1802B Left side – standardRight side – optional2002B to 2342B Right side onlyConventional Combustion AirSupplyU.S. InstallationsAll Air from Inside the BuildingThe confined space shall be provided with TWO per-manent openings communicating directly with anadditional room(s) of sufficient volume so that the com-bined volume of all spaces meets the criteria for aroom large in comparison (NFGC). The total input of allgas utilization equipment installed in the combinedCAUTION: Use TrueSeal combustion air ifdamaging airborne contaminants are or will bepresent in the heater area. See the Appendixregarding air contamination.space shall be considered in making this determina-tion. Each opening shall have a minimum free area of1 in. 2 per 1,000 BTUH (2,225 mm 2 per kW) of the totalinput rating of all gas utilization equipment in the con-fined space, but not less than 100 in. 2 (645 cm 2 ). Oneopening shall commence within 12 in. (305 mm) of thetop, and one opening shall commence within 12 in.(305 mm) of the bottom of the enclosure. The mini-mum dimension of air openings shall be not less than3 in. (76 mm) in any direction.All Air from OutdoorsThe confined space shall communicate with the out-doors in accordance with one of the methods below.The minimum dimension of air openings shall not beless than 3 in. (76 mm) in any direction. Where ductsare used, they shall be of the same cross-sectionalarea as the net free area of the openings to which theyconnect.1. Two permanent openings, one commencingwithin 12 in. (305 mm) of the top, and one com-mencing within 12 in. (305 mm) of the bottom ofthe enclosure, shall be provided. The openingsshall communicate directly, or by ducts, with theoutdoors or spaces (crawl or attic) that freely com-municate with the outdoors.a. Where directly communicating with the out-doors or where communicating to theoutdoors through vertical ducts, each openingshall have a minimum free area of 1 in. 2 per4,000 BTUH (550 mm 2 per kW) of total inputrating of all equipment in the enclosure.b. Where communicating with the outdoorsthrough horizontal ducts, each opening shallhave a minimum free area of 1 in. 2 per 2,000BTUH (1,100 mm 2 per kW) of total input rat-ing of all equipment in the enclosure.2. One permanent opening, commencing within 12in. (305 mm) of the top of the enclosure, shall bepermitted where the equipment has clearances ofat least 1 in. (25 mm) from the sides and back and6 in. (152 mm) from the front of the appliance. Theopening shall directly communicate with the out-doors or shall communicate through a vertical orhorizontal duct to the outdoors or spaces thatfreely communicate with the outdoors, and shallhave a minimum free area of:a. 1 in. 2 per 3,000 BTUH (740 mm 2 per kW) ofthe total input rating of all equipment located inthe enclosure, andCAUTION: This type of installation isrecommended if damaging airborne contaminantsare or will be present in the heater area. See theAppendix regarding air contamination.