Raypak 1334001 Installation & Operating Instructions Manual

Also see for RAYTHERM 133-4001: Installation & operating instructions

Contents

12Outdoor Water HeatersThese heaters are design certified for outdoor installa-tion. Heaters must not be installed under an overhangof less than three (3) feet from the top on the heater.Three (3) sides must be open in the area under theoverhang. Roof water drainage must be diverted awayfrom the heaters installed under overhangs with theuse of gutters.The point from where the flue products exit the heatermust be a minimum of four (4) feet below, four (4) feethorizontally from or one (1) foot above any door, win-dow or gravity inlet to a building. The top surface of theheater shall be at least three (3) feet above any forcedair inlet, or intake ducts located within ten (10) feet hor-izontally.High Wind Conditions (OutdoorUnits Only)In areas where high winds are frequent, it may be nec-essary to locate the heater a minimum of 3' from highvertical walls, or install a wind break so the heater isnot in direct wind current.Combustion Air (Indoor UnitsOnly) Air for Combustion andVentilationThe heater must have both combustion and ventilationair. Minimum requirements for net free air supplyopenings are 12 inches from ceiling for ventilation and12 inches from the floor for combustion air as outlinedin ANSI Z223.1, and any local codes that may havejurisdiction.Fig. 3: Outdoor Clearances from Openingsa. All Air From Inside The Building:Each opening shall have a minimum net free squareinches as noted:b. All Air From Outdoors:When air is supplied directly from outside of building,each opening shall have a minimum net free squareinches as noted:CAUTION: Combustion air must not becontaminated by corrosive chemical fumes whichcan damage the heater. Measures must be taken toprevent the entry of corrosive chemical fumes to thecombustion and ventilation air supply. Suchchemicals include, but are not limited to, chlorinatedand/or fluorinated hydrocarbons such as found inrefrigerants, aerosol propellants, dry-cleaning fluids,degreasers, and paint removers. Other harmfulelements may come from bleaches, air fresheners,or mastics. Vapors from these types of products canform corrosive acid compounds when burned in agas flame. The resulting acidic condensate candamage or substantially reduce the life of the heater.It may become necessary to provide outside airdirectly to the heater in order to avoid this problem.ModelSquareInches ModelSquareInches0133 136 1223 12230182/0181 181 1336 13370260/0261 264 1468 14670330/0331 334 1631 16300400/0401 399 1826 18260514 512 2100 21000624 627 2500 24990724 726 3001 30000824 825 3500 35000962 962 4001 40001125 1125BOLD TYPE indicates Low NOx models.ModelSquareInches ModelSquareInches0133 34 1223 3060182/0181 46 1336 3350260/0261 66 1468 3670330/0331 84 1631 4080400/0401 100 1826 4570514 128 2100 5250624 157 2500 6250724 182 3001 7500824 207 3500 8750962 241 4001 10001125 282BOLD TYPE indicates Low NOx models.Table E: All Air From Inside The BuildingTable F: All Air From Outdoors