Bradford-White Corp BRHHV, BRHHH warranty Electrical Connections, Main Power, Pump Connections

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ΒΡΑΔΦΟΡΔ ΩΗΙΤΕ ΧΟΡΠ.

Section 5

 

ELECTRICAL CONNECTIONS

 

WARNING

 

The appliance must be electrically grounded in

 

accordance with the requirements of the authority

 

having jurisdiction or, in the absence of such

 

requirements, with the latest edition of the National

 

Electrical Code, ANSI/NFPA 70, in the U.S. and

 

with latest edition of CSA C22.1 Canadian Electrical

 

Code, Part 1, in Canada. Do not rely on the gas

 

or water piping to ground the metal parts of the

 

boiler. Plastic pipe or dielectric unions may isolate

 

the boiler electrically. Service and maintenance

 

personnel, who work on or around the boiler, may

 

be standing on wet floors and could be electrocuted

 

by an ungrounded boiler. Electrocution can result in

 

severe injury or death.

 

Single pole switches, including those of safety controls and protective devices must not be wired in a grounded line.

All electrical connections are made in the field wiring box that is located inside the appliance.

NOTE: All internal electrical components have been prewired. No attempt should be made to connect electrical wires to any other location except the wiring box.

Wiring connections are shown in Figures 17 through24.

5.1Main Power

Connect a properly sized and fused, 120-volt

supply to the main power switch (hot leg is connected directly to switch). Neutral leg is connected directly to the white wire. Ground wire can be connected to the grounding screw in the box or on the switch.

5.2Pump Connections

The pump time delay relay will call the pump

to be energized upon a call for heat, and will keep the pump energized for a delay period after the call for heat has ended. The delay period is adjustable from 0.1 to 10 minutes.

Brute Magnum units have pumps that are wired at the factory to the pump time delay system. It is necessary to wire the pump to a separate 115V or 230V single phase circuit, per the wiring diagrams in Figures 17 through 20.

5.3Temperature Control — Boiler

Connect boiler field interlock wires to isolated

contacts on zone valves, circulator relays, sequencing controls (multiple boiler applications) or other temperature controlling devices.

The Brute Magnum temperature control

Figure 12. Temperature Control.

measures temperature on the boiler inlet, sensing return water temperature. Set the temperature control for the desired return temperature. If the return water temperature is less than 140°F (60°C), internal mixing will keep the outlet temperature at 160-165°F (71- 74°C). If the return temperature is 140°F (60°C) or higher, the outlet temperature of the boiler will be the return temperature plus 20-25°F (11-14°C) when the Brute Magnum is at high firing rate.

The manual reset high limit is on the outlet of the Brute Magnum. Set the manual reset high limit at about 20°F (11°C) higher than the highest expected outlet temperature, to avoid nuisance lockouts.

5.4Temperature Control – Water Heater

5.4.1 Remote Water Heater

Temperature Control

The Brute Magnum water heater can be used with a field-supplied tank aquastat, sequencing control, or other temperature control device, which will call the unit for heat when the temperature goes below the controller’s setpoint. For the most efficient setting, set the tank temperature at the lowest possible setting for adequate hot water in the application.

Caution

If the tank temperature control is set too high, a potential for hot water scalding may exist.

After a setting has been chosen for the tank

temperature control, set the heater temperature control 10°F (6°C) higher. The Brute Magnum temperature control measures temperature on the heater inlet, sensing return water temperature. If the return water

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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 DesignationWarranty DimensionsLocating the Appliance Inches 91cm horizontally Venting and Combustion AIR Combustion AirCombustion Air From Room Intake Combustion AirVenting Locating Vent & Combustion Air TerminalsHorizontal 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 RegulatorWater Connections Brute Magnum Boiler 4A.1 Heating System Piping Hot Supply Connections 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 the Burner and Set Up Operating InstructionsFilling the Boiler System Gas/Air Test Panel Maintenance System MaintenanceAppliance Maintenance Component Description Shutting Down the Brute MagnumGas Trains Burner FilterModulating 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 OperationDelayed Ignition Possible Causes Resolving LockoutsShort Cycling Boiler Replacement Parts Short Cycling Water HeaterHigh 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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