Raypak HI DELTA 992B-2342B Installation & Operating Instructions Manual

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

12Fig. 8: Minimum Clearances from CombustibleSurfaces – Outdoor InstallationsCombustion and Ventilation AirIndoor UnitsThe heater must be supplied with sufficient quantitiesof non-contaminated air to support proper combustionand equipment ventilation. Combustion air can be sup-plied via conventional means where combustion air isdrawn from the area immediately surrounding theheater, or via direct vent, where combustion air isdrawn directly from outside. All installations must com-ply with the requirements of the NFGC (U.S.) andB149 (Canada), and all local codes.Reversing Air FilterFollow these instructions to change the air duct con-nection from the left-hand side (standard) to theright-hand side:1. Remove the four screws and the dust cover fromthe right-hand side of the heater.2. Remove the four screws and the air filter bracketfrom the left-hand side of the heater.3. Reverse the components and reattach in the newlocation, making sure that the air filter lockingbracket is on the bottom. (The air filter lockingbracket is reversible.)Direct VentIf outside air is drawn through the intake pipe directlyto the unit for combustion:1. Install combustion air direct vent in accordancewith Fig. 29 (horizontal) or Fig. 30 (vertical) of thismanual (pages 31 and 32, respectively).2. Provide adequate ventilation of the space occu-pied by the heater(s) by an opening(s) forventilation air at the highest practical point com-municating with the outdoors. The totalcross-sectional area shall be at least 1 in. 2 of freearea per 20,000 BTUH (111 mm 2 per kW) of totalinput rating of all equipment in the room when theopening is communicating directly with the out-doors or through vertical duct(s). The totalcross-sectional area shall be at least 1 in. 2 of freearea per 10,000 BTUH (222 mm 2 per kW) of totalinput rating of all equipment in the room when theopening is communicating with the outdoorsthrough horizontal duct(s).3. In cold climates, and to mitigate potential freeze-up, Raypak highly recommends the installation ofa motorized sealed damper to prevent the circula-tion of cold air through the heater during thenon-operating hours.Direct-Ducted Combustion AirIn certain applications it may be desirable to duct thecombustion air directly to the heater. This should bedone with PVC, CPVC or single-wall galvanized duct-ing. The duct will attach directly to the collar on the airfilter housing located on the side of the heater. Theducting is attached to the air filter housing collar usingCAUTION: Combustion air must not becontaminated by corrosive chemical fumes whichcan damage the heater and void the warranty. (Seethe Appendix.)NOTE: It is recommended that the intake vent beinsulated to minimize sweating.NOTE: Use of the heater in construction areaswhere fine particulate matter, such as concrete ordry-wall dust, is present may result in damage to theheater that is not covered by the warranty. Ifoperated in a construction environment, a cleansource of combustion air must be provided directly tothe heater.