Bradford-White Corp Modulating Boiler, BNTH, BNTV SECTION Electrical Connections, Main Power

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SECTION 7.

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BRADFORD WHITE CORP.

 

 

 

 

SECTION 7.

Electrical Connections

7.1 Main PowerWARNING

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 on the terminal blocks that are located inside the control panel.

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

Wiring connections are shown in Figures 29 and 30.

Important Note: DO NOT MAKE/BREAK BRUTE ELITE LINE VOLTAGE TO SIGNAL CALL FOR HEAT. A “call for heat / end call for heat” MUST be connected to the field interlock terminals. Some Brute Elite components are designed to have constant voltage during normal operation. If the Brute Elite's supply voltage is toggled as a call for heat signal, premature failure of these components may result.

Brute Elite does not recognize 4mA as a signal to shut off. If the call for heat is not connected between the field interlock terminals, Brute Elite will remain in low fire when it sees 4mA as a modulating signal.

Manual backgroundCaution

Brute Elite supply voltage must not be disengaged, except for service or isolation, or unless otherwise instructed by procedures outlined in this manual. To signal a call for heat, use the 24V field-interlock, as shown in the wiring diagram(s).

7.1 Main Power

Connect a 15A 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 lug in the control panel (see Table 11).

Figure 27. Control Panel Layout.

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Contents Installation and Operation Instructions DocumentInstallation and Operation Instructions for BRUTE ELITETABLE OF CONTENTS Brute Elite Control Setup and OperationSECTION General InformationSECTION Maintenance Trouble ShootingReplacement Parts SECTION Modes of OperationSECTION General Information 1.1 Introduction1.2 Model Identification Model NomenclatureFigure 1. Location of Components, Sizes Figure 2. Location of Components, SizesFigure 3. Location of Components, Size Figure 4. Location of Components, SizeFigure 5. Location of Components, Size Figure 6. Location of Components, SizeFigure 7. Location of Components, Sizes 750 and 1.4 Warranty 1.6 Dimensions1.3 Appliance Overview 1.5 UnpackingFigure 9. Dimensional Drawing, Sizes Dimensions are nominal and are shown in inches, cm2.1 Locating the Appliance Brute Elite is for indoor installations onlySECTION Locating the Appliance SECTION Venting and Combustion Air 3.1 Combustion Air3.1.1 Combustion Air From Room 3.1.2 Ducted Combustion AirTable 5. Required Exhaust Vent Material 3.2 VentingFigure 10. Combustion Air and Vent Through Roof 3.3 Locating Vent & Combustion Air Terminals 3.2.1 Venting Requirements Unique to CanadaA. exhaust vent terminal not included E. CPVC exhaust pipe section 80-500 not incl3.3.5 Installations in the Commonwealth of Massachusetts 3.3.2 Side Wall Combustion Air Terminal5. For concentric vent, follow instructions included with vent kit 3.3.3 Vertical Vent TerminalFigure 12. Combustion Air and Vent Through Side Wall 3.4 Common Vent Test 2. Approved Carbon Monoxide Detectors3. Signage 4. Inspection3. Refer to Tables 6A, 6B, 6C and 6D to size piping SECTION Gas Supply and Piping4.1 Gas Supply and Piping SECTION Pump Requirements 5.1 Brute Elite Boiler Flow and Head Requirements see Table5.2 Brute Elite Water Heater Flow and Head Requirements see Table Table 6A6A.2 BNTH Cold Water Make-Up SECTION 6A Water Connections - BNTH Boiler6A.1 BNTH System Piping Hot Supply Connections 6A.4 BNTH Suggested Piping Schematics 6A.3 Freeze Protection6A.5 Recognized Chemicals 1. Sentinel Performance Solutions Group 2. Hercules Chemical CompanyFigure 15. Hydronic Piping - Single Boiler zoning with circulators Brute Elite Figure 17. Hydronic Piping - Multiple Boilers zoning with circulators Brute Elite PagePage Brute Elite PagePage SECTION 6B 6B.1 BNTV Water Quality6B.2 Piping Requirements Water Connections - BNTV Water Heater6B.5 BNTV Suggested Piping Schematics 6B.3 Cold Water Make-Up6B.4 Freeze Protection 6B.6 BNTV Suggested PumpsFigure 25. DHW Piping, Two Heaters, One Vertical Tank Figure 26. DHW Piping, Two Heaters, Two Vertical TanksCaution Pump sizing must be based opon water hardness at job site7.1 Main Power SECTION Electrical Connections7.10 Lead Lag/ Cascading Wiring Connections 7.2 Pump Connections7.3 24Vac Transformer with Integral Circuit Breaker 7.4 Hydronic Call for HeatFigure 28. Lead-Lag / Cascading Wiring Connections 7.11 Wiring Diagrams see Figures 29 and Figure 29. Ladder DiagramFigure 30. Wiring Diagram all sizes 8.2 Ignition Control- Sequence of Events SECTION Brute Elite Control Setup and Operation8.1 Display Navigation 8.3 Modulation Control 8.5 Anti-Short Cycle ASC8.5 High Limit 8.7 Outlet Water Temperature8.12.5 Lead Lag Base Load Setting 8.13 Boiler Pump Interrupt8.12.1 Lead Lag Setpoint 8.12.2 Lead Lag Master/Slave Selection9.2 Hydronic Heating with Outdoor Reset 9.4 Hydronic Heating Using External Modulation ControlSECTION Modes of Operation 9.1 Hydronic Heating Demand9.5 Hydronic Heating Using Local Lead- Lag/Cascading Feature 9.7 Warm Weather Shutdown9.8 Domestic Hot Water Demand BNTV only Let’s consider the following example9.9 Domestic Hot Water Heating Using External Modulation Control 10.2 Operating the Burner and Set Up SECTION Operating Instructions10.1 Filling the Boiler System 10.2.1 Burner Operation10.2.2 Boiler Setup and Adjustment 10.3 Shutting Down Brute Elite10.4 To Restart Brute Elite 3. WAIT FIVE 5 MINUTESFigure 33B. Brute Elite Gas Valves 600, 750 and 80-285Figure 33A. Brute Elite Gas Valves 285, 399 and SECTION Maintenance 11.1 System Maintenance11.2 Appliance Maintenance and Component Description yearly, unless otherwise notedIgniters and sensors get hot and can cause burns or injury 11.2.4 Ignitor Assembly11.2.5 Flame Sensor 11.2.8 Heat Exchanger Coils 11.2.6 Transformer with Integral Circuit Breaker11.2.7 Blower SECTION Trouble Shooting 12.3 Error Codes - See Table11.2.9 Gas Pressure Switches optional 12.1 Sequence of OperationPROBLEM SOLUTIONcontinued next page CODE#Table 18. Error Codes see SectionSECTION Replacement Parts 13.2 Parts List13.1 General Information Jacket Components - See FigureGas Train Components - See Figure Heat Exchanger Components - See Figure Contact Customer Service at 800 900-9275 Electrical Components - See FigureFigure 35. Jacket Components Figure 36A. Internal Components, Sizes Figure 36B. Internal Components, SizesFigure 36C. Internal Components, Sizes Figure 37A. Gas Train Components, Sizes Figure 37B. Gas Train Components, Sizes Figure 38. Heat Exchanger Components Figure 39. Electrical Components Brute Elite Tech. Service 800 Service Parts 800Warranty Service 800 Ambler, PA
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