Minimum Output Setting | Bradford-White Corp BRHHH, BRHHV specification

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Figure 15. Control Parameter Graph.

25% and 100% of full fire between 46°C and 49°C. Between 46°C and 49°C, the unit will remain at low fire. Between 38°C and 41°C, the unit will be at full fire.

The throttling range is adjustable between 2°F and 30°F (1°C to 17°C). The range can be set by removing the cover of the S350P control and adjusting the “THROT RANGE” dial (see Figure 14).

5.5.5Minimum Output Setting

The minimum output setting of the controller is 0% of full fire. However, the minimum output of the Brute Magnum is limited to 25% of full fire by the fan speed controller, to ensure proper operation of the Brute Magnum. If a minimum desired output is higher than 25%, the setting can be adjusted up by removing the cover of the S350P control and adjusting the Min Output dial (see Figure 14). Turning the dial clockwise increases the minimum output. In most cases, this setting should be left as shipped from the factory.

5.5.6Integration Constant

The proportional control used on the Brute Magnum has internal circuitry that helps to minimize overshoot that can sometimes be associated with proportional plus integral (PI) controls. There

are three field-selectable integration constants (slow, medium and fast), and an off position on the proportional control, which are selected with the dipswitches on the control (see Figure 14). In most cases, this setting will not need to be changed

Off: Switch 1 to ON position and all others to OFF. Setting the control to the “Off” position puts the control into proportional only operation. This is not a recommended setting for the Brute Magnum.

Slow: Switch 2 to ON position and all others to OFF. This is the slowest integration constant. It allows the Brute Magnum the most time to reach its setpoint. In most cases, this is too slow for Brute Magnum installations.

Medium: Switch 3 to ON position and all others to OFF. The integration constant is set to “Medium” at the factory, and in most cases, will not need to be

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Bradford-White Corp BRHHH, BRHHV warranty Minimum Output Setting, Integration Constant

Contents

Βρυτε Μαγνυμ Βραδφορδ Ωηιτε Χορπ Replacement Parts Table of ContentsMaintenance Troubleshooting List of Figures List of Tables Model Designation General InformationIntroduction Model Identification Warranty DimensionsLocating the Appliance Inches 91cm horizontally Intake Combustion Air Venting and Combustion AIRCombustion Air Combustion Air From Room Venting Locating Vent & Combustion Air TerminalsHorizontal Vent Terminal Combustion Air and Vent Through Side Wall From Massachusetts Rules and Regulations 248 CMR Installation of Carbon Monoxide Detectors Vertical Combustion Air Terminal Common Vent Test BoilersSide Wall Combustion Air Terminal Vertical Vent Terminal Distance from Gas Meter or Last Stage Regulator GAS Supply and Piping Water Connections Brute Magnum Boiler 4A.1 Heating System Piping Hot Supply Connections Boiler4A.2 Cold Water Make-Up Boiler 4B.2 Hot Water Supply Piping Water Heater Water Connections Brute Magnum Water Heater4A.3 Freeze Protection Boiler 4B.1 Water System Piping Water Heater Hydronic Piping Multiple Boilers 4B.3 Water Flow Requirements Water Heater Hydronic Piping Multiple Boilers Alternate 4B.4 Combined Water potable Heating and Space Heating Hydronic Piping One Boiler, Multi-Temperature System 4B.5 Freeze Protection Water Heater Heater or in the pipes in the system. When water Water 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 Electrical Connections Main PowerTemperature Control Boiler Temperature Control Water Heater Differential Setting Temperature Control FeaturesInternal Water Heater Temperature Control Temperature Setpoint Throttling Range Offset Integration Constant Minimum Output Setting Control Parameter Possible Interference Mixing System and Control External Control Connections Wiring Diagrams Wiring 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 the Burner and Set Up Operating InstructionsFilling the Boiler System Gas/Air Test Panel Shutting Down the Brute Magnum MaintenanceSystem Maintenance Appliance Maintenance Component Description Gas Trains Burner FilterModulating Gas Valve Mixing Control Safety Gas ValveManual Reset High Limit Control Auto Reset Temperature Limit Ignition Control Ignitor / Flame Sensor AssemblyFlow Switch Mixing Actuator Sequence of Operation TroubleshootingMotorized Safety Valve Gas Pressure Switches Delayed Ignition Possible Causes Resolving LockoutsShort Cycling Boiler Replacement Parts Short Cycling Water HeaterHigh Gas Consumption Combustion Components See Figure Parts List Electrical 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