Bradford-White Corp Modulating Boiler, BNTH Shutting Down Brute Elite, To Restart Brute Elite

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10.2.2 Boiler Setup and Adjustment

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BRADFORD WHITE CORP.

 

 

 

 

label and turn on gas and electrical power to appliance.

4.Brute Elite will enter the start sequence. Blower and pump will energize for pre-purge, then the ignition sequence starts. After all safety devices are verified, the gas valve opens. If ignition doesn’t occur, turn off the Brute Elite, check that there is proper gas supply. Wait 5 minutes and start the unit again.

5.Turn Brute Elite on.

6.After placing the appliance in operation, the Burner Safety Shutoff Device must be tested:

(a)Close gas shutoff valve with burner operating.

(b)Flame will go out and blower will continue to run for the post purge cycle. One or three additional attempts to light will follow including pre-purge, ignitor on, valve/flame on and post purge. Ignition will not occur as the gas is off. The ignition control will lockout.

(c)Open gas shutoff valve. Reset the boiler control by pressing the RESET button on the control or on the display. Restart the appliance. The ignition sequence will start again and the burner will start. The appliance will return to its previous mode of operation.

10.3 Shutting Down Brute Elite Caution

Should any odor of gas be detected, or if the gas burner does not appear to be functioning in a normal manner, CLOSE MAIN SHUTOFF VALVE. Do not shut off switch. Contact your heating contractor, gas company, or factory representative.

10.2.2 Boiler Setup and Adjustment

1.Connect a manometer capable of reading 0.01"wc to the gas valve locations shown in Figure 33. The positive side of the manometer should be connected to the location labeled “air pressure tap.” The negative side of the manometer should be connected to the location labeled "gas pressure tap." This differential pressure should be slightly negative (see Table 16).

2.Measure the CO2/O2 in the flue products at high fire. The Brute Elite can be forced to high fire to allow for easier setup. Refer to Section 8.1, Table 14 for instructions on how to access the forced rate menu. The CO2 readings should be between the values shown in Table 16. If the CO2 is not within the range shown, adjustments may be made. To adjust the high fire CO2, locate the high fire adjuster screw according to the appropriate figure. Slowly make adjustments in 1/16 of a revolution increments until the CO2 is within the range identified.

3.Measure the CO2/O2 in the flue products at low fire. Brute Elite can be forced to low fire to allow for easier setup. Refer to Section 8.1, Table 14 for instructions on how to access the forced rate menu. CO2 readings should be between the values shown

in Table 16. If the CO2 is not within the range shown, adjustments may be made. To adjust the low fire CO2, locate the low fire adjuster screw according to the appropriate figure. Slowly make adjustments in 1/16 of a revolution increments until the CO2 is within the range identified.

4.Repeat steps 2 and 3 to confirm that the CO2 ranges are within the required ranges. Adjust if necessary.

5.Confirm that the differential pressure is still within the appropriate range.

6.If any of the measurements cannot be adjusted to the specified ranges or the CO levels are above 150ppm when adjusted please consult the factory for further information.

7.Remove the differential pressure gauge from the air and gas pressure taps making sure to close all ports after the gauge has been removed.

10.4 To Restart Brute Elite WARNING

Improper adjustment may lead to poor combustion quality, increasing the amount of carbon monoxide produced. Excessive carbon monoxide levels may lead to personal injury or death.

GAS TYPE

HIGH FIRE, CO2

LOW FIRE, CO2

DIFFERENTIAL

PRESSURE

 

 

 

 

 

 

 

Natural

9.0 to 8.8%

0.5% lower than

-.005 to

Propane

10.0 to 9.8%

high fire setting

-.015" wc

 

 

 

 

Table 16. CO2 Range and Pressure Differential.

10.3 Shutting Down Brute Elite

1.Turn off the main electrical disconnect switch.

2.Close all manual gas valves.

3.If freezing is anticipated, drain Brute Elite and be sure to also protect building piping from freezing. All water must be removed from heat exchanger or damage from freezing may occur.

This step to be performed by a qualified service person.

10.4 To Restart Brute Elite

If drained, follow Section 10.1 in this manual for proper filling and purging.

1.Turn off the main electrical disconnect switch.

2.Close all manual gas valves.

3.WAIT FIVE (5) MINUTES.

4.Set the aquastat or thermostat to its lowest setting.

5.Open all manual gas valves.

6.Reset all safety switches (pressure switch, manual reset high limit, etc.).

7.Set the temperature controller to the desired temperature setting and switch on electrical power.

8.Burner will go through a prepurge period and ignitor warm-up period, followed by ignition.

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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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