Bradford-White Corp BNTV, BNTH, Modulating Boiler Venting, Combustion Air and Vent Through Roof

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3.2 Venting

Brute Elite

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combustion air intake (see Table 4), sized per Table 2. Route the intake to the boiler as directly as possible. Seal all joints. Provide adequate hangers. The unit must not support the weight of the combustion air intake pipe. Maximum linear pipe length allowed is shown in Table 2. Subtract 5 allowable linear ft. (1.5m) for every elbow used.

The connection for the intake air pipe is at the top of the unit (see Figure 9a or Figure 9b).

In addition to air needed for combustion, air shall also be supplied for ventilation, including air required for comfort and proper working conditions for personnel.

3.2 Venting

Figure 10. Combustion Air and Vent Through Roof. WARNING

Failure to use CPVC or stainless steel venting for the first 20" (285-600) / 30" (80-210) of vent material or for any part of the venting that is installed inside a closet may lead to property damage, personal injury or death. The proper length of this material is supplied with boiler. Boilers in U.S. may use pipe included with boiler.

Table 5. Required Exhaust Vent Material. WARNING

Failure to use the appropriate vent material, installation techniques, glues/sealants could lead to vent failure causing property damage, personal injury or death.

Manual background WARNING

All venting must be installed according to this manual and any other applicable local codes, including but not limited to, ANSI Z223.1/NFPA 54, CSA B149.1, CSAB149.2 and ULC-S636. Failure to follow this manual and applicable codes may lead to property damage, severe injury, or death.

The flue temperature of the Brute Elite changes dramatically with changes in operating water temperature. Therefore, it is necessary to assess the application of the boiler to determine the required certified vent class. If the Brute Elite is installed in an application where the ambient temperature is elevated, and/or installed in a closet/alcove, CPVC or stainless steel material is required. If the system temperatures are unknown at the time of installation, class IIB or higher venting material is recommended.

The Brute Elite is a Category IV appliance and may be installed with PVC and CPVC that complies with ANSI/ASTM D1785 F441, or a stainless steel venting system that complies with UL 1738 Standard (see Table 5).

The unit’s vent can terminate through the roof, or through an outside wall.

When using PVC/CPVC for vent material, venting must be connected to the CPVC section included with Brute Elite sizes 80-600. The CPVC vent section included with the Brute Elite may be broken by CPVC fittings if necessary, but never reduced in total length. See Table 2 to select the appropriate vent pipe diameter. Vent pipe must pitch upward, toward the vent terminal, not less than 1/4" per foot, so that condensate will run back to the Brute Elite to drain. Route vent pipe to the heater as directly as possible. Seal all joints and provide adequate hangers as required in the venting system manufacturer’s Installation Instructions. Horizontal portions of the venting system must be supported to prevent sagging and may not have any low sections that could trap condensate. The unit must not support the weight of the vent pipe. Please see Table 2 for proper diameter vs. length allowed.

IMPORTANT NOTE ABOUT COMMON VENTING: A single vent that is shared by multiple Brute Elite units MUST be engineered by a competent venting specialist, and involves the selection of draft inducing equipment, hardware and controls to properly balance flue gas pressures. Do not common vent Brute Elite

Figure 10. Combustion Air and Vent Through Roof.

 

 

INSTALLATION STANDARDS

 

 

 

 

MATERIAL

UNITED STATES

 

CANADA

Stainless Steel

UL 1738

 

Venting must be ULC-S636 certified for use as

PVC, sch 40

ANSI/ASTM D178

 

venting material. The venting material must be chosen

CPVC, sch 40

ANSI/ASTM F441

 

based upon the intended application of the boiler.

 

 

 

 

Table 5. Required Exhaust Vent Material.

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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, SizesSECTION Locating the Appliance Brute Elite is for indoor installations only2.1 Locating the Appliance 3.1 Combustion Air SECTION Venting and Combustion Air3.1.1 Combustion Air From Room 3.1.2 Ducted Combustion AirFigure 10. Combustion Air and Vent Through Roof 3.2 VentingTable 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. Inspection4.1 Gas Supply and Piping SECTION 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 6A6A.1 BNTH System Piping Hot Supply Connections SECTION 6A Water Connections - BNTH Boiler6A.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 8.1 Display Navigation SECTION Brute Elite Control Setup and Operation8.2 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 MINUTESFigure 33A. Brute Elite Gas Valves 285, 399 and 80-285Figure 33B. Brute Elite Gas Valves 600, 750 and 11.1 System Maintenance SECTION Maintenance11.2 Appliance Maintenance and Component Description yearly, unless otherwise noted11.2.5 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 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