Lochinvar RSB-i&s-05, 45 Conventional Negative Draft Venting System, Table B Vent Pipe Sizes

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EXHAUST FANS: Any fan or equipment which ex- hausts air from the room where the appliance is installed may deplete the combustion air supply and/or cause a down draft in the venting system, spilling flue products into the room. Spillage of flue products from the venting system into an occupied living space can cause a very hazardous condition that must be corrected im- mediately. If a fan is used to supply combustion air to the room where the appliance is installed, the installer must make sure that it does not cause drafts which could lead to nuisance operational problems with the appliance.

VENTING

Vent installations for connection to gas vents or chimneys must be in accordance with Part 7, “Venting of Equipment,” of the latest edition of the National Fuel Gas Code, ANSI Z223.1, in Canada, the latest edition of CGA Standard B149 Installation Code for Gas Burning Appliances and Equipment or applicable provisions of the local building codes.

Adequate combustion and ventilation air must be supplied to the room where the appliance is installed in accordance with the latest edition of the National Fuel Gas Code, ANSI Z223.1, in Canada, the latest edition of CGA Standard B149 Installation Code for Gas Burning Appliances and Equipment, or applicable provisions of the local building codes.

The distance of the vent terminal from adjacent buildings, windows that open and building openings MUST comply with the latest edition of the National Fuel Gas Code, ANSI Z223.1, in Canada, the latest edition of CGA Standard B149 Installation Code for Gas Burning Appliances and Equipment.

Vent connection is made directly to the top of the appliance. This appliance is designed with a built-in draft diverter. No additional external draft hood is re- quired. The connection from the appliance vent to the common vent or chimney must be made as direct as possible.

FIG. 9 Conventional Negative Draft Vertical Venting

A CONVENTIONAL NEGATIVE DRAFT

VENTING SYSTEM

The negative draft in a conventional vent installation must be within the range of a negative 0.02 to 0.05 inches water column to ensure proper operation. All draft readings are made while the appliance is in stable operation (approximately 2 to 5 minutes).

Multiple appliance installations with combined venting or common venting with other negative draft applianc- es require that each appliance must have draft within the proper range. If the draft measured above the appliance’s built-in draft diverter exceeds the specified range in a dedicated chimney for a single appliance installation or in combined venting with other negative draft appliances, a barometric damper must be installed to control draft.

TABLE - B

VENT PIPE SIZES

Input Btu/hr

Flue Size

45,000

4"

75,000

5"

90,000

5"

135,000

6"

180,000

7"

199,999

7"

215,000

7"

260,000

8"

315,000

8"

360,000

9"

399,999

10"

500,000

10"

 

 

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Contents Special Instructions to Owner WarrantyChecking Equipment Contents User Warning Codes Installation ProcedureLocation of Unit Clearances from Combustible Construction Clearance from Combustible ConstructionCombustion Air Through Ducts Openings Table a Minimum Recommended Combustion AIR SupplyInput Btu/hr Flue Size VentingConventional Negative Draft Venting System Table B Vent Pipe SizesPage Vent Termination from Peaked Roof 10’ or Less from Ridge Venting TerminationInspection of a Masonry Chimney Sidewall Venting Masonry Chimney InstallationVent Damper and Vent Damper Terminal Block Automatic Vent DamperTable D Manifold Pressure GAS Supply GAS Pressure TestTable C GAS ConnectionTable G GAS Connections Table F Fittings to Equivalent Straight PipeBtu/hr Distance from Meter In Feet GAS Piping Install Piping to ControlWrench GAS Manifold Pressure Adjustment ProcedurePilot Checking GAS Supply PressureVenting of Combination Gas Valves Combination GAS ValvesRelief Valve Water Heater Relief Valve Water Flow Switch if EquippedTable J AMP Draw Data Minimum Flow Rate Required to Actuate Flow SwitchLOW Water Cutoff if Equipped TWO Stage Burner Control SystemLocating Temperature Control Temperature AdjustmentTemperature Control Settings Operating Temperature ControlHigh-Fire Offset Temperature Control SensorsInstallation of Remote Sensors Wiring of Remote SensorsAdditional Temperature Controls Outdoor AIR Reset OptionManual Reset High Water Temperature Limit Blocked Vent and Flame ROLL-OUT/FLAME Interlock SwitchInitial START-UP What to do if YOU Smell GAS PRE-START ChecklistInput for Your Safety Read Before Operating Lighting Instructions for Standing Pilot Models F1Lighting Wand To Turn OFF GAS to Appliance Safety Shutoff Test for Standing Pilot Ignition SystemLighting Instructions for Spark Ignition Pilot Models F9/M9 Operating Instructions To Turn OFF GAS to Appliance Safety Shutoff Test for Spark Ignition Pilot SystemF9/M9 Intermittent Spark Ignition Pilot Models Intermittent Pilot Spark Ignition System F9/M9Freeze Protection Freeze Protection for a HeatingWater Treatment MaintenanceRemoval of Combustion Chamber Lining or Base Panels Inspection Cleaning ProcedureOuter Air Deflector and HEX Filler Bracket Circulator Pump Requirements GAS Train and ControlsWater Connections Heating Boilers only Piping of the Boiler SystemTable L Circulator Pump SpecificationsCirculator Pump Operation Primary/Secondary Piping of a Single Boiler PRIMARY/SECONDARY Boiler PipingThree WAY Valves LOW Temperature Bypass RequirementsBoiler Flow Rates General Plumbing Rules Table M Minimum Required Flow for Heating BoilerTable N Installation with a Chilled Water SystemWire Gauge Boiler Operating Temperature ControlPower Venter Connection To Terminal Strip Table O Terminal Strip WiringBtu/hr To 7 Grains To 25 Grains Hardness Required Temperature RiseTable P Required Temperature Rise Water Velocity ControlSoftened Water Systems Water ChemistryPump Operation Heat Exchanger Remote Sensor Installation InstructionsThermostat Settings Minimum Pump PerformanceOptional Relief Valve Automatic Vent DampersCathodic Protection Thermal ExpansionDo not plug or cap the relief valve discharge Troubleshooting Guide 90,000 270,000 Btu/hr Models Water Heaters F1 Schematic Diagram F1 Unit Schematic Diagram F9 Unit Schematic Diagram M9 Unit Schematic Diagram F9/M9 Unit Page
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