Safety Control Operation Water Boilers

6)Once the ignition module detects the presence of a pilot flame, voltage is applied across the main valve (terminals “MV” and “MV/PV”), opening the valve and establishing main flame.

7)The way in which the ignition module handles failure to establish pilot or the loss of an already established pilot depends upon the exact ignition module supplied with the boiler. For more information on module operation, consult the ignition module instructions supplied with the boiler or the local Crown representative.

8)The boiler will fire until the boiler water temperature is approximately equal to the low limit setting. Once the water temperature reaches this point, “R” and “B” open and “R” and “W” make. At this point, a call for heat from the thermostat will energize 1R, making contacts 1R1 and 1R2. Contacts 1R1 energize the circulator. Contacts 1R2 switch current from the “hot” side of the transformer secondary to the high limit switch. If the high limit is made, current flows to terminal “B1” and the ignition sequence is then the same as it is for a call for burner operation from the low limit (see (3) above).

Safety Control Operation - Water Boilers

High Limit - Interrupts main burner operation when the supply water temperature exceeds set point. Maximum allowable temperature is 250°F. If the high limit opens, the vent damper will close if the damper switch is in the “automatic” posi- tion. The circulator will continue to operate as long as there is a call for heat, regardless of the status of the high limit (if the boiler is equipped with a tankless coil, the low limit switch will prevent the circulator from operating if the boiler water temperature is too low). Burner operation automatically resumes when the supply water temperature falls below set point.

Blocked Vent (“Spill”) Switch - Automatically interrupts main burner operation in the event that flue gas spills from the draft diverter opening. This switch is equipped with a reset button which must be pressed to restore normal burner operation. An open blocked vent switch is indicative of a problem with the vent system. If the blocked vent switch opens, the cause of the venting problem must be found and corrected by a qualified gas service technician before the blocked vent switch is reset.

XII - Start-up and Checkout - In addition to start-up procedure shown in the installation manual, also verify that the vent damper (if installed) is in the open position when the burners are firing.

XIII Service in Maintenance - Refer to installation manual.

XIV Parts - Parts lists on following pages describe cartons and components unique to the 32-380ECS and 32-475ECS. Refer to the installation manuals where indicated for universal parts lists.

32-380ECS, 32-475ECS specifications

Crown Boiler is renowned for its innovative and reliable heating solutions, and its models 32-475ECS and 32-380ECS are prime examples of the company’s commitment to performance and efficiency. These residential and light commercial steam boilers are designed to deliver warmth and comfort while minimizing energy consumption, all within a robust and durable framework.

One of the standout features of the Crown Boiler 32-475ECS and 32-380ECS is their adaptability to various heating applications. These boilers are sized appropriately for numerous residential settings, providing heating solutions for homes of different dimensions and layouts. Their large heating capacities, rated at 475,000 BTUs/hour for the 32-475ECS and 380,000 BTUs/hour for the 32-380ECS, are suitable for larger spaces or buildings requiring significant heat output.

Both models utilize a fire-tube design, which promotes efficient heat transfer and helps conserve fuel. This design leads to improved thermal efficiency compared to traditional designs, making them an environmentally-friendly choice for homeowners concerned about carbon footprints. Additionally, the units feature advanced natural gas burners that enhance combustion efficiency, ensuring that less fuel is consumed to achieve the desired heating level.

The Crown Boiler models also come equipped with various safety features, including a pressure relief valve and low water cutoff, which help to ensure safe and reliable operation during the boiler's lifecycle. The combination of these safety mechanisms with robust construction materials ensures long-lasting performance even under demanding conditions.

Furthermore, the 32-475ECS and 32-380ECS are designed for ease of installation and maintenance. They feature a user-friendly control system, allowing homeowners and technicians to monitor performance and make necessary adjustments easily. The serviceability of these units is enhanced by their compact design, which can save space in mechanical rooms and facilitate troubleshooting.

In summary, the Crown Boiler 32-475ECS and 32-380ECS represent an exceptional choice for those seeking efficient, reliable, and safe heating solutions. With their powerful heating capacities, advanced technology, and thoughtful design, these models exemplify Crown Boiler's dedication to quality and innovation in the heating industry. Whether for residential or light commercial use, these boilers provide the performance and efficiency that modern buildings demand.