Bryant 234 D User Manual

Details the Model 234 boiler, its type, certification, pressure ratings, and available configurations.

Guidelines for boiler placement, foundation, combustible floor insulation, and clearances from combustible materials.

Requirements for supplying adequate air for combustion and ventilation based on boiler input and room conditions.

Specifications for flue pipe sizing, slope, routing, termination, support, and chimney connections.

Instructions for gas line installation, shutoff valve placement, purging, and leak detection.

Ensures electrical connections comply with National Electric Code and local codes, using specified wire types.

Specifies water outlet positioning for PW boilers based on pump mounting location.

Details parallel piping for chilled-water systems and flow control for air handling units.

Instructions for filling the system with water, bleeding air, and preparing for initial operation.

Guidance on adjusting pilot flames for different gas controls to ensure proper ignition and operation.

Procedure for checking and adjusting gas input rate and manifold pressure for optimal performance.

Procedure for adjusting air shutters to achieve optimal flame characteristics for each burner.

Verifying the proper function and delay actions of the Bryant gas control valve.

Testing the safety shutoff feature of the automatic pilot system.

Specifies the correct flame appearance and contact with the thermocouple for proper operation.

Explains how the thermocouple generates power to operate the gas control valve and shutoff.

Describes the normally open switch in the D4 pilot assembly that controls the gas valve.

Details the role of the adjustable spring-loaded regulator in maintaining constant burner gas pressure.

Operation of the D6 system using a powerpile thermocouple to generate electrical energy for controls.

Function of the high-temperature limit switch that opens on temperature rise to control gas valve.

How this control shuts off gas supply to burners based on steam pressure settings.

Control that shuts off gas supply if boiler water level drops, allowing refill.

Diagrams and specifications for steam header piping dimensions for various boiler models.

Procedure for slowly adding water, adjusting flame, and skimming impurities from the boiler.

Instructions for building steam pressure and draining the boiler to remove sediment.

Guidance on using cleaning compounds for boilers with significant dirt or sludge.

Specific instructions and cautions for using cleaning compounds like Sal Soda.

Recommendations for yearly examination of flue passages and semi-annual checks of boiler controls.

Advice against draining boilers unnecessarily and the importance of checking for system leaks.

Step-by-step instructions for cleaning the boiler, including removing components and brushing passages.

Schematic for steam boiler electrical connections, detailing controls like pressure and low water cutoff.

Wiring diagram for GW water boilers, showing connections for self-generating and non-100% shutoff controls.

Diagram for PW water boilers with forced circulation, including circulator and control switch connections.

Wiring schematic for D5 natural gas boilers with 100% shut-off, self-generating controls and reverse acting low limit.