Bradford-White Corp BRHHV Mixing System and Control, Control Parameter Possible Interference

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ΒΡΑΔΦΟΡΔ ΩΗΙΤΕ ΧΟΡΠ.

Figure 16. Control Parameter Possible Interference.

changed. This setting will be the best suited to most Brute Magnum installations.

Fast: Switch 4 to ON position and all others to OFF. If the rate of system recovery to setpoint is sluggish with the control set to medium, the “Fast” setting may be an improvement. The “Fast” setting will only be used when the rate of change at the sensor is very rapid. In most cases, this setting is too fast for the Brute Magnum.

5.6Mixing System and Control

The Brute Magnum has an internal mixing

system that ensures that the condensation does not occur on the finned copper heat exchanger, with boiler return temperature down to 70°F (21°C). This

system, that consists of automatically actuated and linked valves, is set up at the factory, and is non-adjustable. The return water goes through the stainless steel heat exchanger, then to the mixing system (see Figure 7).

If the water at the inlet of the copper heat

exchanger is less than 140°F (60°C), water from the outlet of the copper heat exchanger will be directed back to the inlet of the copper heat exchanger, and will mix to bring the inlet water up to 140°F (60°C). Once through the copper heat exchanger, the water picks up

another 20-25°F (11-14°C) (when at high fire), and it leaves the boiler at 160-165°F (71-74°C). This hot water is then sent to the system.

If the water at the inlet of the copper heat exchanger is 140°F (60°C), or higher, the water will be allowed to flow through the copper heat exchanger and directly to the outlet of the Brute Magnum, and there will be a 20-25°F (11-14°C) temperature rise between the inlet and outlet of the unit, when the unit is at high fire.

The by-pass mixing control displays the mixed water temperature, which is the temperature of the water that is sent to the copper heat exchanger. This temperature setting is locked and cannot be changed in the field.

By pressing and holding the two buttons on the left of the mixing control for at least 3 seconds, the user will access two available menus.

The first menu allows selection of the temperature units. Pressing the two left buttons for at least 3 seconds displays “Uni” on the screen (for units). Then “°F” is displayed. Press the up or down arrow on the control to change from °F to °C, or °C to °F. When the preferred selection is displayed, press the enter (bottom left) button. The control will then display “Add” for the second menu. If no more buttons are pushed, the control will automatically return to the temperature display mode.

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Contents Βρυτε Μαγνυμ Βραδφορδ Ωηιτε Χορπ Table of Contents MaintenanceTroubleshooting Replacement PartsList of Tables List of FiguresGeneral Information IntroductionModel Identification Model DesignationDimensions WarrantyLocating the Appliance Inches 91cm horizontally Venting and Combustion AIR Combustion AirCombustion Air From Room Intake Combustion AirLocating Vent & Combustion Air Terminals VentingHorizontal Vent Terminal Combustion Air and Vent Through Side Wall Installation of Carbon Monoxide Detectors From Massachusetts Rules and Regulations 248 CMRCommon Vent Test Boilers Side Wall Combustion Air TerminalVertical Vent Terminal Vertical Combustion Air TerminalGAS Supply and Piping Distance from Gas Meter or Last Stage Regulator4A.1 Heating System Piping Hot Supply Connections Boiler Water Connections Brute Magnum Boiler4A.2 Cold Water Make-Up Boiler Water Connections Brute Magnum Water Heater 4A.3 Freeze Protection Boiler4B.1 Water System Piping Water Heater 4B.2 Hot Water Supply Piping Water Heater4B.3 Water Flow Requirements Water Heater Hydronic Piping Multiple BoilersHydronic Piping Multiple Boilers Alternate Hydronic Piping One Boiler, Multi-Temperature System 4B.4 Combined Water potable Heating and Space HeatingHeater or in the pipes in the system. When water 4B.5 Freeze Protection Water HeaterWater Heater Piping One Heater, One Tank Water Heater Piping Multiple Heaters, One Tank Water Heater Piping One Heater, Multiple Tanks Water Heater Piping Multiple Heaters, Multiple Tanks Main Power Temperature Control BoilerTemperature Control Water Heater Electrical ConnectionsTemperature Control Features Internal Water Heater Temperature ControlTemperature Setpoint Differential SettingOffset Throttling RangeMinimum Output Setting Integration ConstantMixing System and Control Control Parameter Possible InterferenceWiring Diagrams External Control ConnectionsWiring Diagram, Size 1200, Standard and Codes a and F Βρυτε Μαγνυμ Wiring Diagram, Size 1200, Code B Wiring Diagram, Sizes 1600, 2000 and 2400, Code B Wiring Schematic, Model 1200, Standard and Codes a and F Wiring Schematic, Model 1200, Code B Operating Instructions Operating the Burner and Set UpFilling the Boiler System Gas/Air Test Panel Maintenance System MaintenanceAppliance Maintenance Component Description Shutting Down the Brute MagnumGas Trains Filter BurnerModulating Gas Valve Safety Gas Valve Manual Reset High Limit ControlAuto Reset Temperature Limit Mixing ControlIgnitor / Flame Sensor Assembly Flow SwitchMixing Actuator Ignition ControlTroubleshooting Motorized Safety ValveGas Pressure Switches Sequence of OperationResolving Lockouts Delayed Ignition Possible CausesShort Cycling Boiler Short Cycling Water Heater Replacement PartsHigh Gas Consumption Parts List Combustion Components See FigureElectrical Components See Figure Jacket See Figure Combustion Components Gas Train/Combustion Air Components Gas Train Components Electrical Components Heat Exchanger / Water Path Components Heat Exchanger / Water Path Components Jacket Components Litho in U.S.A. Bradford White 1102 Document
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