Bradford-White Corp BMT2H Trouble Shooting, Resolving Lockouts, Delayed Ignition Possible Causes

Page 31

Brute Deluxe (500-2000)

Page 31

 

The Brute Deluxe has a pre-mixed burner system. These systems provide the burners with sufficient air for complete combustion, and black carbon sooting is seldom experienced. If sooting is suspected, view ports for inspection of the heat exchanger are provided on the right side of the boiler. They are located below the headers, and are accessed by opening the small round cover that is attached by one screw. In the unlikely event that there is a buildup of black carbon soot or other debris on the heat exchanger, clean per the following:

1.Disconnect the electrical supply to the unit.

2.Turn off the gas supply by closing the manual gas valve on the heater.

3.Disconnect and remove the wires, conduit and sensors from all components that are attached to the inlet/outlet header.

4.Isolate the heat exchanger from the water supply.

5.Disconnect the header flanges from the inlet and outlet.

6.Allow the heat exchanger to drain. Remove the front cover(s) by removing the rubber access strip(s) and the retaining screws. Remove the venting and remove the top, by removing the screws that attach the top to the side panels. Remove the side panels. Remove the front lower panels sealing the combustion area. To remove the gas train, disconnect the unions located below the intermediate pan and the field installed union located outside the cabinet, and pull up, bringing the union end connectors through the grommets in the intermediate pan. To remove the intermediate pan, remove the slide out control assembly and blower(s) to reveal the screws. Remove the screws holding the intermediate pan, and lift up to remove it. The heat exchanger has integral metal sections attached, which connect to the frame of the boiler. Locate and remove the screws along the front, rear and bottom of the integral metal sections, and remove the heat exchanger and metal sections by lifting up. On the larger appliances, a center heat exchanger support must be unbolted before it can be removed.

7.Remove the heat exchanger from the unit. Note: The heat exchangers are heavy and may require two people to remove to avoid personal injury.

8.Clean the heat exchanger: A light accumulation of soot or corrosion on the outside of the heat exchanger can be easily removed. Use a wire brush to remove loose soot and scale from the heat exchanger. Do not use water or compressed air for cleaning.

9.Note: While the heat exchanger is out of the unit, inspect the firewall refractory insulation. Replace if necessary.

10.Inspect the inside of the copper tubes for scale buildup. Scale can build up on the inner surface of the heat exchanger tubes, which can restrict water

flow. If the tubes show signs of scaling, clean the internal surface. offers a tube cleaning kit, part number R0010000.

11.Reassemble in the reverse order, and check appliance operation after start-up.

NOTE: The Warranty does not cover damage caused by lack of required maintenance, lack of water flow, or improper operating practices.

SECTION 8.

Trouble Shooting

8.1 Resolving Lockouts

There are many causes of lockouts. The three most common causes are: (1) inadequate gas supply, (2) poor combustion, (3) ignitor failure.

1.Inadequate gas supply: Before proceeding, ensure that the gas supply has not been shutoff or the LP tank (LP boilers) is not empty. Then, restart the boiler and observe the operational cycle. After a 15-second fan pre-purge, the ignitor will heat up for 20 seconds, and then the unit will light. If it does not, check the gas supply pressure to the appliance, after resetting the appliance and attempting another start-up. The gas pressure to the appliance must be above 5" W.C. (1.2kPa) throughout the entire start-up cycle. If it is not, correct the supply problem (check gas valves or supply piping). If the supply pressure is adequate, consult the factory for assistance.

2.Poor combustion: Poor combustion should be suspected if there is a strong flue gas odor. The odor may result from an improper gas/air ratio (high or low O2 or CO2). Brute Deluxe appliances operate best with 45% excess air (8% CO2 on natural gas, 9.2% CO2 on LP). Check the CO2 of the appliance and adjust if necessary.

3.Ignitor failure: If the boiler goes through a normal start cycle but combustion does not occur, ignitor failure should be suspected. Check the ignitor by unplugging the ignitor plug and measuring the ignitor resistance. It should be 50-80 ohms at room temperature. If the resistance is not 50-80 ohms, replace the ignitor. If the resistance is correct, reset the boiler and check for 120 VAC at the ignitor plug during the start cycle. If there is no voltage, replace the faulty ignitor wire harness or the ignition control.

8.2 Delayed Ignition — Possible Causes

A defective burner can cause a delayed ignition. If the gas supply pressure is proper and the gas valves are functioning properly, then burners should be inspected. There should be no distortion or perforations in the burners outside of the active burner port area. Replace if indicated.

Page 30 Page 32
Image 31
Page 30 Page 32
Contents Brute Deluxe Table of Contents Introduction General InformationModel Identification Clearances WarrantyDimensions Locating the Appliance57¾ 33¾ 16¾ 42545¾ 22¾ 50534¼ 10¼ 80¾ 16¾ 46¼22¾ 58¼ 28¾ 70¼Intake Combustion Air Venting and Combustion AirCombustion Air Combustion Air From RoomCommon Venting Systems VentingVent Categories Category I VentVertical Vent Terminal Locating Vent & Combustion Air TerminalsSide Wall Vent Terminal Side Wall Combustion Air TerminalCombustion Air and Vent Through Side Wall Vertical Combustion Air Terminal Common Vent Test BoilersNatural Gas Supply and PipingVent Terminals for Outdoor Units Natural Propane4A.1 Heating System Piping Hot Supply Connections Boiler Water Connections Boiler4A.4 Freeze Protection Boiler Water Connections Water Heater4A.2 Cold Water Make-Up Boiler 4A.3 Water Flow Requirements Boiler4B.5 Freeze Protection Water Heater Electrical Connections4B.2 Hot Water Supply Piping Water Heater 4B.3 Water Flow Requirements Water HeaterHydronic Piping Multiple Boilers, Primary Secondary System Hydronic Piping One Boiler, Multi-Temperature System Water Heater Piping One Heater, One Tank Water Heater Piping Multiple Heaters, One Tank Water Flow Requirements BMT2V Water Heater Piping Multiple Heaters, Multiple TanksField Wiring Main PowerBrute Deluxe 1000 Wiring Diagram Brute Deluxe 500-750 Connection Diagram Brute Deluxe 1000 Connection Diagram Brute Deluxe 1250-2000 Connection Diagram Filling the System External Staging Control WiringOperating Instructions Sequence of OperationExternal Boiler Operations Operating Temperature ControlOperating the Burner and Set Up Set Up for 0 to 2500 Feet AltitudeHigh Altitude Adjustment and Set Up Shutting Down the Brute Deluxe MaintenanceSystem Maintenance Appliance Maintenance Component DescriptionFilter Manual Reset High Limit ControlTemperature Control Flow SwitchDelayed Ignition Possible Causes Trouble ShootingResolving Lockouts High Gas Consumption Replacement PartsShort Cycling Water Heater Parts List see next Short Cycling BoilerInternal Components See Figure Sheet Metal Components See FigureGas Train Components See Figure Heat Exchanger Components See Figure Electrical Components See Figure Sheet Metal Components Internal Components Brute Deluxe Water Heater Brute Deluxe Hydronic BoilerElectrical Components

BMT2H, BMT2V, Hydronic Boiler, Water Volume Heater specifications

Bradford-White Corporation, a leader in the water heating and hydronic heating industries, offers an impressive range of products designed to meet diverse residential and commercial needs. Among their notable innovations are the BMT2V and BMT2H series hydronic boilers and water volume heaters, which combine state-of-the-art technology with user-friendly features.

The BMT2V and BMT2H models are designed to deliver high-efficiency heating solutions for various applications. One of the key features of these boilers is their superior thermal efficiency, which reduces fuel consumption while ensuring optimal output. With a range of BTU inputs suitable for different heating needs, these boilers can provide efficient heating for residential, commercial, and industrial applications.

Both the BMT2V and BMT2H units are built with advanced combustion technology, allowing for cleaner and more efficient burning of fuel. This not only contributes to lower emissions but also ensures that the boilers operate quietly and reliably. The integrated draft inducer further enhances the efficiency of the combustion process by optimizing airflow, leading to improved overall performance.

Another standout characteristic of these models is their robust construction. Made with high-quality materials, the BMT2V and BMT2H boilers are designed to endure harsh operational conditions while providing long-lasting performance. The tanks are lined with corrosion-resistant coatings, which significantly extend the lifespan of the unit and reduce maintenance requirements.

Both models are also equipped with smart control systems that enable precise temperature regulation and easy monitoring of system performance. These controls allow users to adjust settings remotely or via integrated digital interfaces, further enhancing user convenience. Additionally, the integration of safety features, such as pressure relief valves and automated shut-off systems, ensures safe operation.

The BMT2 series also emphasizes ease of installation and maintenance. Compact designs and flexible venting options allow for versatile installation in various environments. Serviceability is streamlined through easily accessible components, ensuring that technicians can perform maintenance tasks efficiently.

In summary, Bradford-White's BMT2V and BMT2H hydronic boilers and water volume heaters embody efficiency, durability, and advanced technology. With their focus on sustainability and high performance, these models are ideal choices for anyone looking to invest in reliable heating solutions.
Top Page Image Contents