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

4587%-Efficiency Boilers –Special InstructionsWater PipingAn 87%-efficiency boiler requires a minimum inletwater temperature of 120ºF (49ºC) to prevent exces-sive condensation in the combustion chamber. An87%-efficiency boiler operated with an inlet tempera-ture of less than 120ºF (49ºC) must have a manualbypass or an approved low-temperature operationsystem to prevent problems with condensation. A man-ual bypass, shown in Fig. 15, must be piped into thesystem at the time of installation. This piping is like aprimary/secondary boiler installation with a bypass inthe secondary boiler piping. Raypak strongly recomm-NOTE: The constructions of the 84%- (standard)and 87%-efficiency (optional) boilers are very similar,and they are installed to the same requirements,except as noted in this section.ends that a thermometer be placed into the boiler inletpiping next to the in/out header to facilitate tempera-ture adjustment. Inlet water temperatures below 120ºF(49ºC) can excessively cool the products of combus-tion, resulting in condensation on the heat exchanger.VentingAppliance CategoriesSee Table P for appliance category requirements forthe 87%-efficiency Hi Delta.CAUTION: Proper installation of flue venting is criti-cal for the safe and efficient operation of the boiler.NOTE: For additional information on appliancecategorization, see appropriate code NFGC (U.S.)and B149 (Canada), or applicable local buildingcodes.20°F T 30°F T 40°F T Min. Flow Max FlowModelNo. gpm P (ft) gpm P (ft) gpm P (ft) gpm P (ft) T gpm P (ft) T992BE 86 5.6 57 2.5 43 1.4 43 1.4 40 132 13.1 131262BE 110 10.3 73 4.6 55 2.6 55 2.6 40 132 14.8 171532BE 132 16.5 89 7.6 67 4.3 67 4.3 40 132 16.5 201802BE N/A N/A 104 11.5 78 6.5 78 6.5 40 132 18.3 242002BE N/A N/A 116 14.8 87 8.5 87 8.5 40 132 19.0 262072BE N/A N/A 120 15.8 90 9.1 90 9.1 40 132 19.0 272342BE N/A N/A N/A N/A 102 12.9 102 12.9 40 132 21.4 31CombustionAir SupplyExhaustConfigurationHeater VentingCategoryCertifiedMaterialsCombustion AirInlet MaterialVertical Natural DraftVenting IIFrom Inside Building(Non-Direct Venting) Horizontal Through-the-Wall Venting IVAL29-4CStainless Steel(Gas Tight)Vertical Natural DraftVenting IIFrom Outside Building(Direct Venting) Horizontal Through-the-Wall Venting IVAL29-4CStainless Steel(Gas Tight)Galvanized SteelPVCABSCPVCTable O: Heater Rate of Flow and Pressure DropTable P: Category Determination for Venting Purpose and Venting ArrangementNote: Basis for minimum flow is 40°F ΔT. Basis for maximum flow is 132 gpm.