Bradford-White Corp BNTV SECTION Maintenance, System Maintenance, yearly, unless otherwise noted

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SECTION 11.

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BRADFORD WHITE CORP.

 

 

 

 

SECTION 11.

Maintenance

11.1 System Maintenance WARNING

Disconnect all power to the appliance before attempting any service to the appliance. Contact with electricity can result in severe injury or death.

11.1 System Maintenance

(yearly, unless otherwise noted)

1.Lubricate the system water-circulating pump, if required, per the instructions on the pump.

2.If a strainer is employed in a pressure reducing valve or the piping, clean it every six moBNTHs.

3.Inspect the venting system for obstruction or leakage at least once a year. Periodically clean the screens in the vent terminal and combustion air terminal (when used).

4.Keep the appliance area clear and free from combustible materials, gasoline, and other flammable vapors and liquids.

5.If the appliance is not going to be used for extended periods in locations where freezing normally occurs, it should be isolated from the system and completely drained of all water.

6.Low water cutoffs, if installed, should be checked every year. Float type low water cutoffs should be flushed periodically.

7.Inspect and clean the condensate collection, float switch and disposal system yearly.

8.When a means is provided to neutralize condensate, ensure that the condensate is being neutralized properly.

9.Inspect flue passages, and clean with brushes/ vacuums, if necessary. Sooting in flue passages indicates improper combustion. Determine the cause and correct.

10.Inspect the vent system and air intake system, and ensure that all joints are sealed properly. If joints need to be resealed, completely remove existing sealing material, and clean with alcohol. Apply new sealing material, and reassemble.

11.2Appliance Maintenance and Component Description

Use only genuine Bradford White replacement

parts.

(yearly, unless otherwise noted) Caution

Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper and danger- ous operation. Verify proper operation after servicing.

Brute Elite gas and electric controls are engineered for long life and dependable operation, but the safety of equipment depends on their proper functioning. Only a

qualified service technician should inspect the basic

items listed below every year:

 

a. Appliance control

f. Flow switch

b. Automatic gas valve

g. Low water cutoff

c. Pressure switches

h. Burner

d. Blower

i. Heat exchanger

e. Pump

 

11.2.1 Burner

Check the burner for debris. Remove the blower arm assembly to access the burner. Remove the 4 bolts connecting the blower to the arm (see Figure 34).

Remove the 5 bolts, which hold the burner arm in place. Pull burner up and out. Clean burner, if necessary, by blowing compressed air from the outside of the burner into the center of the burner, and wipe the inside of the burner clean with glass cleaner. A dirty burner may be an indication of improper combustion or dirty combustion air. Determine the cause, and correct. If damaged, replace the burner gasket when replacing the burner.

NOTE: When installing the burner, make sure the flange is aligned with the mating surface, as each is keyed to control fit.

11.2.2 Modulating Gas Valve / Venturi

The modulating gas valve consists of a valve body that incorporates the ON/OFF gas flow control and a negative pressure regulator. It provides the air/gas ratio control in combination with the venturi to the unit. It is designed to operate with gas supply pressure between 4 and 13 inches w.c.. To remove the gas valve and or venturi, shut off the 120 Volt power supply to the boiler. Turn off all manual gas valves connecting the boiler to the main gas supply line. Remove the front door of the boiler to gain access to the gas valve and venturi. Disconnect the four (4) flange bolts connecting the gas manifold pipe to the gas valve. Remove the electrical connections to the gas valve. Remove the bolts connecting the venturi flange to the blower. This allows the entire gas valve/venturi assembly to be removed as an assembly to facilitate inspection and cleaning.

After the valve has been removed, reassemble in reverse order making sure to include all gaskets and O- rings. Turn on the manual gas valves and check for gas leaks. Turn on the 120 Volt power. Place the unit in operation following the instructions in Section10. Once the boiler is operating check for leaks again and confirm all fasteners are tight.

Check appliance setup according to Section 10.

11.2.3 Appliance Control

Brute Elite has an integrated control that incorporates manual reset high limit control, operating temperature control, modulating control, ignition control, outdoor reset control, pump control and many other features. If any of these features are thought to be defective, please consult the factory for proper trouble shooting practices prior to replacing the control. If control replacement is required, turn off all power to the

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Contents Installation and Operation Instructions for Installation and Operation InstructionsDocument BRUTE ELITESECTION TABLE OF CONTENTSBrute Elite Control Setup and Operation General InformationReplacement Parts SECTION MaintenanceTrouble Shooting SECTION Modes of Operation1.2 Model Identification SECTION General Information1.1 Introduction 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 1.3 Appliance Overview 1.4 Warranty1.6 Dimensions 1.5 UnpackingFigure 9. Dimensional Drawing, Sizes Dimensions are nominal and are shown in inches, cmSECTION Locating the Appliance Brute Elite is for indoor installations only2.1 Locating the Appliance 3.1.1 Combustion Air From Room SECTION Venting and Combustion Air3.1 Combustion Air 3.1.2 Ducted Combustion AirFigure 10. Combustion Air and Vent Through Roof 3.2 VentingTable 5. Required Exhaust Vent Material A. exhaust vent terminal not included 3.3 Locating Vent & Combustion Air Terminals3.2.1 Venting Requirements Unique to Canada E. CPVC exhaust pipe section 80-500 not incl5. For concentric vent, follow instructions included with vent kit 3.3.5 Installations in the Commonwealth of Massachusetts3.3.2 Side Wall Combustion Air Terminal 3.3.3 Vertical Vent TerminalFigure 12. Combustion Air and Vent Through Side Wall 3. Signage 3.4 Common Vent Test2. Approved Carbon Monoxide Detectors 4. Inspection4.1 Gas Supply and Piping SECTION Gas Supply and Piping3. Refer to Tables 6A, 6B, 6C and 6D to size piping 5.2 Brute Elite Water Heater Flow and Head Requirements see Table SECTION Pump Requirements5.1 Brute Elite Boiler Flow and Head Requirements see Table Table 6A6A.1 BNTH System Piping Hot Supply Connections SECTION 6A Water Connections - BNTH Boiler6A.2 BNTH Cold Water Make-Up 6A.5 Recognized Chemicals 6A.4 BNTH Suggested Piping Schematics6A.3 Freeze Protection 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 6B.2 Piping Requirements SECTION 6B6B.1 BNTV Water Quality Water Connections - BNTV Water Heater6B.4 Freeze Protection 6B.5 BNTV Suggested Piping Schematics6B.3 Cold Water Make-Up 6B.6 BNTV Suggested PumpsCaution Pump sizing must be based opon Figure 25. DHW Piping, Two Heaters, One Vertical TankFigure 26. DHW Piping, Two Heaters, Two Vertical Tanks water hardness at job site7.1 Main Power SECTION Electrical Connections7.3 24Vac Transformer with Integral Circuit Breaker 7.10 Lead Lag/ Cascading Wiring Connections7.2 Pump Connections 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 8.1 Display Navigation SECTION Brute Elite Control Setup and Operation8.2 Ignition Control- Sequence of Events 8.5 High Limit 8.3 Modulation Control8.5 Anti-Short Cycle ASC 8.7 Outlet Water Temperature8.12.1 Lead Lag Setpoint 8.12.5 Lead Lag Base Load Setting8.13 Boiler Pump Interrupt 8.12.2 Lead Lag Master/Slave SelectionSECTION Modes of Operation 9.2 Hydronic Heating with Outdoor Reset9.4 Hydronic Heating Using External Modulation Control 9.1 Hydronic Heating Demand9.8 Domestic Hot Water Demand BNTV only 9.5 Hydronic Heating Using Local Lead- Lag/Cascading Feature9.7 Warm Weather Shutdown Let’s consider the following example9.9 Domestic Hot Water Heating Using External Modulation Control 10.1 Filling the Boiler System 10.2 Operating the Burner and Set UpSECTION Operating Instructions 10.2.1 Burner Operation10.4 To Restart Brute Elite 10.2.2 Boiler Setup and Adjustment10.3 Shutting Down Brute Elite 3. WAIT FIVE 5 MINUTESFigure 33A. Brute Elite Gas Valves 285, 399 and 80-285Figure 33B. Brute Elite Gas Valves 600, 750 and 11.2 Appliance Maintenance and Component Description SECTION Maintenance11.1 System Maintenance yearly, unless otherwise noted11.2.5 Flame Sensor 11.2.4 Ignitor AssemblyIgniters and sensors get hot and can cause burns or injury 11.2.7 Blower 11.2.6 Transformer with Integral Circuit Breaker11.2.8 Heat Exchanger Coils 11.2.9 Gas Pressure Switches optional SECTION Trouble Shooting12.3 Error Codes - See Table 12.1 Sequence of Operationcontinued next page PROBLEMSOLUTION CODE#Table 18. Error Codes see Section13.1 General Information SECTION Replacement Parts13.2 Parts List 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 Warranty Service 800 Tech. Service 800Service Parts 800 Ambler, PA
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