Bradford-White Corp Hydronic Boiler, Water Volume Heater, BMT2V, BMT2H Operating Instructions

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BRADFORD WHITE CORP.

 

 

5.3 External Staging Control Wiring

WARNING

Improper field wiring may result in fire or explosion which can cause property damage, severe injury, or death. Make only wiring connections which are in accordance with the Installation and Operation manual.

AVERTISSEMENT

Un câblage incorrect lors de l’installation peut causer un incendie ou une explosion pouvant entraîner des dommages matériels, de graves blessures ou la mort. Ne faire seulement que les connexions conformes au Manuel d’installation et d’exploitation.

If controlling the stages of the BMT2 from an

external source (multiple boiler control, BAS, etc.), wire Stage 1 to the terminals marked "Input Stage 1" and "Stage 1", and wire Stage 2 to the terminals marked "Input Stage 2" and "Stage 2". The "Local/Remote" selector switch above the terminal strip must be placed in the "Remote" position for the external controller to manage the staging.

If it is intended to use the BMT2's on-board 2- stage controller, no extra wiring is necessary. Ensure the Local/Remote selector switch is in the "Local" position.

SECTION 6.

Operating Instructions

6.1 Sequence of Operation

Upon initiation of the main power switch, 120V will be sent to multiple items. Among these are the open contact fan relays, open contact ignitor relay, open contact pump relay, ignition control module(s) and open contact lock out indicators (the optional alarm package uses this). In addition to these, 24V will travel through the optional gas pressure switches and optional auto reset high limit. 24V will then travel through the block flue switch and the manual reset high limit to the temperature controller.

Upon a call for heat from the BMT2’s internal control or an external staging control, 24V travels through the field interlock (if closed) and then to the ignition control(s) “T-stat” terminal (500-750 models are equipped with one ignition control and models 1000- 2000 are equipped with two ignition controls).

When “T-stat” on an ignition control is energized, its fan will energize and the ignition control will seek signal from the “pressure circuit”. The pressure circuits consist of the flow switch and proof of fan.

Sizes 500-1000 calls for fan, fan prove, initiate pump then prove flow, after which “pressure circuit” has been satisfied.

Sizes 1250-2000 calls for pump, proof of flow, initiate fan then prove fan, after which “pressure circuit” has been satisfied. The fan prove will only occur for the active stage that has been called.

When pressure circuit has been satisfied, proving combustion air and adequate water flow, the hot surface igniter will initiate. The ignition control checks that the igniter current reached a predetermined level then will dwell momentarily. When dwell time is complete the gas valve will open.

After a 4-second trial for ignition, the igniter switches off. Unless a flame is detected by the flame sensor (a minimum value of 0.4µA), the gas valve will close and The ignition module will either attempt ignition again (up to three times) or will lock out if the optional lockout ignition module is used.

If flame is sensed, the burner will continue to fire as long as there is a call for heat and adequate flame signal. If there is a subsequent loss of flame signal, the burner will attempt re-ignition up to three times (only once if optional lockout ignition is used.) When the call for heat is satisfied, the gas valves(s) close and the blowers continues to run for 30 seconds.

The pump will continue to run for 0.1 to 10 minutes, depending on what the pump time delay has been set to. Brute Deluxe sizes 1,000-2,000 have two ignition controls that control the individual stages. If one ignition control should fail for any reason, the remaining module can operate its burners independently. (Note that if a single blower is disabled on units 1250-2000, the other fan will continue to operate and safely allow the boiler to run with a single stage.)

6.2 Filling the System

1.Ensure the system is fully connected. Close all bleeding devices and open make-up water valve. Allow system to fill slowly.

2.If make-up water pump is employed, adjust pressure switch on pumping system to provide a minimum of 12 psi (81.8 kPa) at the highest point in the heating loop.

3.If a water pressure regulator is provided on the make-up water line, adjust the pressure regulator to provide at least 12 psi (81.8 kPa) at the highest point in the heating loop.

4.Open bleeding devices on all radiation units at the high points in the piping throughout the system, unless automatic air bleeders are provided at such points.

5.Run system circulating pump for a minimum of 30 minutes with the boiler shut off.

6.Open all strainers in the circulating system, check flow switch operation, and check for debris. If debris is present, clean out to ensure proper circulation.

7.Recheck all air bleeders as described in Step 4.

8.Check liquid level in expansion tank. With the system full of water and under normal operating pressure, the level of water in the expansion tank should not exceed ¼ of the total, with the balance filled with air.

9.Start up system according to the procedure in this manual. Operate the entire system, including the

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Contents Brute Deluxe Table of Contents Model Identification General InformationIntroduction Locating the Appliance WarrantyDimensions Clearances22¾ 505 33¾ 16¾ 42545¾ 57¾28¾ 70¼ 16¾ 46¼22¾ 58¼ 34¼ 10¼ 80¾Combustion Air From Room Venting and Combustion AirCombustion Air Intake Combustion AirCategory I Vent VentingVent Categories Common Venting SystemsSide Wall Combustion Air Terminal Locating Vent & Combustion Air TerminalsSide Wall Vent Terminal Vertical Vent TerminalCombustion Air and Vent Through Side Wall Common Vent Test Boilers Vertical Combustion Air TerminalNatural Propane Gas Supply and PipingVent Terminals for Outdoor Units NaturalWater Connections Boiler 4A.1 Heating System Piping Hot Supply Connections Boiler4A.3 Water Flow Requirements Boiler Water Connections Water Heater4A.2 Cold Water Make-Up Boiler 4A.4 Freeze Protection Boiler4B.3 Water Flow Requirements Water Heater Electrical Connections4B.2 Hot Water Supply Piping Water Heater 4B.5 Freeze Protection 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 Heater Piping Multiple Heaters, Multiple Tanks Water Flow Requirements BMT2VMain Power Field WiringBrute Deluxe 1000 Wiring Diagram Brute Deluxe 500-750 Connection Diagram Brute Deluxe 1000 Connection Diagram Brute Deluxe 1250-2000 Connection Diagram Sequence of Operation External Staging Control WiringOperating Instructions Filling the SystemSet Up for 0 to 2500 Feet Altitude Operating Temperature ControlOperating the Burner and Set Up External Boiler OperationsHigh Altitude Adjustment and Set Up Appliance Maintenance Component Description MaintenanceSystem Maintenance Shutting Down the Brute DeluxeFlow Switch Manual Reset High Limit ControlTemperature Control FilterResolving Lockouts Trouble ShootingDelayed Ignition Possible Causes Short Cycling Boiler Replacement PartsShort Cycling Water Heater Parts List see next High Gas ConsumptionSheet Metal Components See Figure Internal Components See FigureGas Train Components See Figure Heat Exchanger Components See Figure Electrical Components See Figure Sheet Metal Components Internal Components Brute Deluxe Hydronic Boiler Brute Deluxe Water HeaterElectrical 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.
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