Bradford-White Corp BWCV, BWCH, Copper Brute II Hydronic Boiler Hydronic Primary/Secondary Mode

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COPPER BRUTE II (500 - 2000)

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delay setting of 5 minutes. See Section 6.4.6 for more information.

NOTE: In modes other than mode 6, the pump will run continuously if the “HtD” and “ComD” terminals are jumpered and not connected to a zone valve or pump end switch, or other “contact closure” device to indicate when the heat demand in the system is satisfied. The pump will never run, and the boiler will never fire, if the jumper is removed and the terminals left empty.

OUTDOOR RESET (modes 4 and 5): Outdoor reset adjusts the target temperature based on the outdoor air temperature and reset ratio. The reset ratio is determined from the Boiler Start, Boiler Design, Outdoor Start and Outdoor Design settings.

HEAT DEMAND – For heat demand to exist, there must be continuity between the Com D (common demand) and Ht D (heat demand) terminals. The Copper Brute II ships with a jumper between these terminals.

The control also evaluates the sensor(s) installed in the system. If the control is not in warm weather shutdown (WWSD), and the sensor(s) are below the target temperature, the “Dem” segment is turned on in the display. The control energizes the pump (on pump mounted boilers) and energizes both “PMP” terminals. The pump symbol appears in the display (see Figures 25 and 26). The control then operates the stages to maintain the setpoint temperature.

Boil Start (Boiler Start): The BOIL START temperature is the theoretical boiler supply temperature that the heating system requires when the outdoor air temperature equals the OUTDR START temperature setting.

EXAMPLE 1

DHW (Mode 3) Programming. For domestic hot water systems up to 175°F / 79°C, use mode 3 as described below.

Step 1: Install the additional sensor into the

storage tank, wiring it to “SC2” and “SUPS” terminals on the field wiring panel (Figure 23).

Step 2: Press the three programming buttons to enter ADJUST mode (Figure 25). Press ITEM to select the programming item, and the arrow keys to adjust the setting. TARGET TANK is desired tank temperature. Recommended settings with a desired tank temperature of 125°F:

Example DHW Programming

Item

F°

C°

MODE

3

3

BOIL TARGET

140°F

60°C

TARGET TANK

125°F

52°C

DIFF TANK

2°F

1°C

BOIL MASS

1

1

DIFF

2°F

1°C

DLY

5:00

5:00

F°

F°

°C

Step 4: See Section 6.4.11 Limit Controls. Set both high limits 25°F / 14°C higher than BOIL TARGET to allow for temperature rise across heat exchanger. Manual high limits on water heaters have a maximum 200°F / 93°C setting. (If water must be at 175°F / 79°C or higher with a volume water heater model, use mode 1. For volume water applications exceeding 200°F / 93°C, contact the factory.)

Fine tuning: For faster staging, increase BOIL TARGET setting. Larger DIFF TANK and DIFF settings will slow response to demand, but may save energy.

If unit short cycles, enter Advanced

Programming mode (Section 6.4) and increase BOILER MAX setting to the BOIL TARGET setting or higher. Set BOILER MIN to 120°F / 49°C, and STGMODE to PID. See Section 6.4.12 Advanced Programming Mode to enter Advanced Programming mode, or contact the factory for assistance.

EXAMPLE 2

Hydronic Primary/Secondary (Mode 2)

 

Figure 27. Temperature Control Target Temperature

Figure 26. Temperature Control Symbol Description.

Graph.

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Contents Copper Brute Table of Contents Operating Instructions MaintenanceTrouble Shooting Replacement PartsGeneral Information IntroductionModel Identification Warranty DimensionsLocating the Appliance Dimensional Data Inches 91cm horizontally Intake Combustion Air Venting and Combustion AirCombustion Air Combustion Air From RoomCommon Venting Systems VentingVent Categories Category I VentCombustion Air and Vent Through Side Wall Side Wall Combustion Air Terminal Locating Vent & Combustion Air TerminalsCategory III Vent Side Wall Vent TerminalVertical Combustion Air Terminal Common Vent Test BoilersVent Terminals for Outdoor Units Vertical Vent Terminal61-91m Gas Supply and Piping4A.3 Water Flow Requirements Boiler Water Connections Copper Brute II Boiler4A.1 Heating System Piping Hot Supply Connections Boiler 4A.2 Cold Water Make-Up BoilerHydronic Piping Multiple Boilers, Primary Secondary System Hydronic Piping Multiple Boilers, Low Temperature System Hydronic Piping One Boiler, Multi-Temperature System Hydronic Piping Primary-Secondary, Reverse-Return Boiler CIRC. Pump Sized for Flow Through Boiler 4B.3 Water Flow Requirements Water Heater Water Connections Copper Brute II Water Heater4B.1 Water System Piping Water Heater 4B.2 Hot Water Supply Piping Water HeaterSupply 4B.5 Freeze Protection Water HeaterWater Heater Piping Multiple Heaters, One Tank Water Heater Piping Multiple Heaters, Multiple Tanks Main Power Temperature ControlElectrical Connections Field Wiring Panel Avertissement External Staging Control WiringCopper Brute II 500 750 Ladder Diagram Copper Brute II 1000 Ladder Diagram Copper Brute II 1250 2000 Ladder Diagram Copper Brute II 500 1000 Wiring Schematic Copper Brute II 1250 1500 Wiring Schematic Copper Brute II 1750 2000 Wiring Schematic Terminal designations are as indicated Field Wiring for Modes 1 Avertissement Operating Instructions Sequence of OperationFilling the Boiler System Parallel Piping Programming the Temperature ControlChoosing the Mode System Piping Primary Secondary PipingFor ALL Other Modes Hydronic Primary/Secondary Mode Mechanical aquastat in a domestic hot water storage tank Choosing the Mode for your ApplicationMode 5 Primary secondary piping with outdoor reset Staging Mode Advanced TopicsDifferential Pump Operation Boiler Target TemperatureBoiler Minimum Boil MIN Boiler Maximum Boil MAXOutdoor Reset Operation Setpoint OperationDedicated Domestic Hot Water Typical Gas Train Configuration External Boiler Operation Operating the Burner and Set UpAdvanced Programming Mode Set Up for 0 to 2500 Feet AltitudeHigh Altitude Adjustment and Set Up Shutting Down the Copper BruteTo Restart the Copper Brute Maintenance System MaintenanceAppliance Maintenance Component Description Ignitors Temperature ControlFlow Switch Ignition ControlsBradford White Corp Trouble Shooting Troubleshooting Copper Brute Controls Troubleshooting the Temperature ControlCopper Brute II 500 Troubleshooting Error Codes Parts List Replacement PartsSee Figures 35 Heat Exchanger Components Electrical Components Gas Train Components Burner Manifold Assy, 4 Burners, Left, LP For reference Internal Components Copper Brute II Hydronic Electrical Components H2214401F
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