Bradford-White Corp BNTH Pump Connections, 7.3 24Vac Transformer with Integral Circuit Breaker

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7.2 Pump Connections

Brute Elite

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BOILER

 

 

PUMP CONNECTIONS

 

 

 

 

 

 

 

RATINGS

 

 

 

 

 

 

 

SIZES

VOLTS

PHASE

AMPS

 

(Boiler, System Pump and

 

 

 

 

 

 

DHW Pump Connections)

 

 

 

 

 

 

 

80–850

120

Single

2*

 

115V – Maximum 1HP

No Pump

 

 

or 7.4A max

 

 

 

 

 

 

 

 

 

 

 

 

 

 

80-500

 

 

 

Less

 

115V – Maximum 1HP

120

Single

than

 

With Pump

 

 

or 7.4A max

 

 

 

6*

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

*Minimum 15A circuit required

 

 

 

 

 

Table 10. BNTH Electrical Data.

 

 

 

 

 

 

 

 

 

 

WATER HEATER

SIZES

 

 

VOLTS

 

PHASE

AMPS

150-500

 

 

120

 

Single

2*

No pump

 

 

 

 

 

 

 

 

 

 

150-199

 

 

120

 

Single

7*

With pump

 

 

 

 

 

 

 

 

 

 

285-500

 

 

120

 

Single

8*

With pump

 

 

 

 

 

 

 

 

 

 

600-850

 

 

See Pump Rating Plate FLA

No pump

 

 

(must be less than 7.4 FLA; 1HP or less)

*Minimum 15A circuit required

Table 11. BNTV Electrical Data.

7.2 Pump Connections

Brute Elite energizes the pump contacts upon a call for heat. Once the call for heat is satisfied the pump will remain on for the defined pump overrun time.

NOTE: System and DHW contacts are dry contacts. Appropriate voltage must be supplied to the System and DHW pumps for proper operation. Boiler pump contact (max 7.4 FLA) is fed by 120V (violet wire) internally from main power feed.

System pump connections are located on terminal block 5 (TB5) in the control panel (see Figure 27). The system pump contacts are rated for 120Vac, 7.4 amps. To use the contacts, power must be supplied on one terminal with the other terminal wired to the pump or a relay controlling the pump.

DHW pump connections are located on terminal block 5 (TB5) in the control panel and are rated for 120Vac, 7.4 amps. To use the contacts, power must be supplied on one terminal, and the other terminal wired to the pump or a relay controlling the pump.

7.324Vac Transformer with Integral Circuit Breaker

24Vac is supplied by a transformer mounted to the backside or underneath the control panel, depending upon the appliance. All 24Vac power is supplied through a circuit breaker that is part of the transformer. The transformer is then connected to terminal blocks 3 and 4 (TB3 and TB4).

7.4 Hydronic Call for Heat

Connect the call for heat to terminal block 7 (TB7), connections labeled "T-T or interlock" in the control panel.

7.5 Outdoor Air Temperature Sensor

Connect the outdoor air temperature sensor to terminal block 7 (TB7), connections labeled Outdoor temp sensor. The outdoor air temperature sensor is used for warm weather shutdown and outdoor reset.

7.6 Domestic Hot Water Connection

Connect a DHW sensor or aquastat to terminal block 6 (TB6), connections labeled DHW stat. The aquastat or sensor will be automatically detected and initiate the DHW call as needed.

7.7System Sensor (lead lag/cascading operation only)

Connect the system sensor to terminal block 6 (TB6), connections labeled system sensor. Can be used in a well for DHW tank applications with lead/lag.

7.8 External Control Connections

Connect 4-20mA signals from external controls or building automation systems to terminal block 7 (TB7) in the control panel. The connections are labeled "Remote Anlaog Input". When making the connections follow the polarity designations shown on the label.

7.9 Optional Field Connections

Terminal block 8 (TB8) in the control panel can be used for connecting optional components, such as, low water cutoffs, flow switches, additional high limits and other field supplied devices that must be interlocked with the boiler. All safeties or end switches must be wired in series by removing the supplied jumpers.

7.10Lead Lag/ Cascading Wiring Connections

Connect each boiler in the cascade system together by daisy chaining each control from Modbus port 1 (MB1) of the first boiler to the second and so on. This can be done using 22awg or thicker shielded twisted pair wire with drain. Two twisted pairs or three conductors are needed.

a.To daisy-chain the boilers connect a wire from Modbus port 1 (MB1) terminal A of the first boiler to Modbus port 1 (MB1) terminal A of the second boiler.

b.If there are more boilers in the system connect a wire from Modbus port 1 terminal A of boiler 2 to Modbus port 1 terminal A of boiler 3.

c.Repeat these steps until all Modbus port1 terminal A connections are wired.

d.Repeat the above steps for Modbus port 1 terminal B and C connections to complete the wiring.

e.Connect the drain wire from the twisted pair wire to ground on one end of the wire only.

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Contents Document Installation and Operation InstructionsInstallation and Operation Instructions for BRUTE ELITEBrute Elite Control Setup and Operation TABLE OF CONTENTSSECTION General InformationTrouble Shooting SECTION MaintenanceReplacement Parts SECTION Modes of Operation1.1 Introduction SECTION General Information1.2 Model Identification Model NomenclatureFigure 2. Location of Components, Sizes Figure 1. Location of Components, SizesFigure 4. Location of Components, Size Figure 3. Location of Components, SizeFigure 6. Location of Components, Size Figure 5. Location of Components, SizeFigure 7. Location of Components, Sizes 750 and 1.6 Dimensions 1.4 Warranty1.3 Appliance Overview 1.5 UnpackingDimensions are nominal and are shown in inches, cm Figure 9. Dimensional Drawing, SizesBrute Elite is for indoor installations only SECTION Locating the Appliance2.1 Locating the Appliance 3.1 Combustion Air SECTION Venting and Combustion Air3.1.1 Combustion Air From Room 3.1.2 Ducted Combustion Air3.2 Venting Figure 10. Combustion Air and Vent Through RoofTable 5. Required Exhaust Vent Material 3.2.1 Venting Requirements Unique to Canada 3.3 Locating Vent & Combustion Air TerminalsA. exhaust vent terminal not included E. CPVC exhaust pipe section 80-500 not incl3.3.2 Side Wall Combustion Air Terminal 3.3.5 Installations in the Commonwealth of Massachusetts5. For concentric vent, follow instructions included with vent kit 3.3.3 Vertical Vent TerminalFigure 12. Combustion Air and Vent Through Side Wall 2. Approved Carbon Monoxide Detectors 3.4 Common Vent Test3. Signage 4. InspectionSECTION Gas Supply and Piping 4.1 Gas Supply and Piping3. Refer to Tables 6A, 6B, 6C and 6D to size piping 5.1 Brute Elite Boiler Flow and Head Requirements see Table SECTION Pump Requirements5.2 Brute Elite Water Heater Flow and Head Requirements see Table Table 6ASECTION 6A Water Connections - BNTH Boiler 6A.1 BNTH System Piping Hot Supply Connections6A.2 BNTH Cold Water Make-Up 6A.3 Freeze Protection 6A.4 BNTH Suggested Piping Schematics6A.5 Recognized Chemicals 1. Sentinel Performance Solutions Group 2. Hercules Chemical CompanyFigure 15. Hydronic Piping - Single Boiler zoning with circulators Page Figure 17. Hydronic Piping - Multiple Boilers zoning with circulators Page Brute ElitePage Page Brute ElitePage 6B.1 BNTV Water Quality SECTION 6B6B.2 Piping Requirements Water Connections - BNTV Water Heater6B.3 Cold Water Make-Up 6B.5 BNTV Suggested Piping Schematics6B.4 Freeze Protection 6B.6 BNTV Suggested PumpsFigure 26. DHW Piping, Two Heaters, Two Vertical Tanks Figure 25. DHW Piping, Two Heaters, One Vertical TankCaution Pump sizing must be based opon water hardness at job siteSECTION Electrical Connections 7.1 Main Power7.2 Pump Connections 7.10 Lead Lag/ Cascading Wiring Connections7.3 24Vac Transformer with Integral Circuit Breaker 7.4 Hydronic Call for HeatFigure 28. Lead-Lag / Cascading Wiring Connections Figure 29. Ladder Diagram 7.11 Wiring Diagrams see Figures 29 andFigure 30. Wiring Diagram all sizes SECTION Brute Elite Control Setup and Operation 8.1 Display Navigation8.2 Ignition Control- Sequence of Events 8.5 Anti-Short Cycle ASC 8.3 Modulation Control8.5 High Limit 8.7 Outlet Water Temperature8.13 Boiler Pump Interrupt 8.12.5 Lead Lag Base Load Setting8.12.1 Lead Lag Setpoint 8.12.2 Lead Lag Master/Slave Selection9.4 Hydronic Heating Using External Modulation Control 9.2 Hydronic Heating with Outdoor ResetSECTION Modes of Operation 9.1 Hydronic Heating Demand9.7 Warm Weather Shutdown 9.5 Hydronic Heating Using Local Lead- Lag/Cascading Feature9.8 Domestic Hot Water Demand BNTV only Let’s consider the following example9.9 Domestic Hot Water Heating Using External Modulation Control SECTION Operating Instructions 10.2 Operating the Burner and Set Up10.1 Filling the Boiler System 10.2.1 Burner Operation10.3 Shutting Down Brute Elite 10.2.2 Boiler Setup and Adjustment10.4 To Restart Brute Elite 3. WAIT FIVE 5 MINUTES80-285 Figure 33A. Brute Elite Gas Valves 285, 399 andFigure 33B. Brute Elite Gas Valves 600, 750 and 11.1 System Maintenance SECTION Maintenance11.2 Appliance Maintenance and Component Description yearly, unless otherwise noted11.2.4 Ignitor Assembly 11.2.5 Flame SensorIgniters and sensors get hot and can cause burns or injury 11.2.6 Transformer with Integral Circuit Breaker 11.2.7 Blower11.2.8 Heat Exchanger Coils 12.3 Error Codes - See Table SECTION Trouble Shooting11.2.9 Gas Pressure Switches optional 12.1 Sequence of OperationSOLUTION PROBLEMcontinued next page CODE#see Section Table 18. Error Codes13.2 Parts List SECTION Replacement Parts13.1 General Information Jacket Components - See FigureGas Train Components - See Figure Heat Exchanger Components - See Figure Electrical Components - See Figure Contact Customer Service at 800 900-9275Figure 35. Jacket Components Figure 36B. Internal Components, Sizes Figure 36A. 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 Page Service Parts 800 Tech. Service 800Warranty Service 800 Ambler, PA
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