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5)When a call for heat is satisfied, the damper relay coil is de-energized - closing the contacts which energize the damper motor. This causes the damper to close. When the damper blade reaches the fully closed position, the damper motor is de-energized.

6)Should a power failure occur, the damper blade will stop in the position it was in when power was lost. Combus- tion can never take place unless the damper blade is in the fully open position.

Sequence of Operation – Standard Boiler Wiring

1)All low water cut-offs and auxiliary limit controls are wired in series so that the boiler will not operate if any of these controls are open. Under normal circumstances, only the operating control contacts will be open.

2)Upon a call for heat, the operating control will make and the vent damper (if used) will open. Simultaneously, 120 volts will be applied to the circulator.

3)24 volts will then appear across the “24V” and “24V (GND)” terminals on the ignition modules.

4)Upon application of voltage across the “24V” and “24V (GND)” terminals, the ignition module will start an ignition spark at the pilot and apply 24 volts across the pilot valve.

5)Once the pilot is established, the pilot flame will act as a diode, converting the AC current at the electrode to a half wave DC current at the pilot’s ground strap. This DC current flows through the boiler to the “GND (BURNER)” connection on the ignition module.

6)Once the ignition module detects the presence of a pilot flame, voltage is applied across the main valve, 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.

Sequence of Operation – CSD-1 Boiler Wiring

1)All low water cut-offs, limit controls, and the operating contacts are wired in series so that the boiler will not operate if any of these controls are open. Under normal circumstances, only the operating control contacts will be open.

2)Upon a call for heat, the operating control will make and the vent damper (if used) will open. Simultaneously, 120 volts will be applied to the circulator.

3)24 volts will then appear across the “24V” and “24V (GND)” terminals on the ignition modules and on the “24VAC” and “COM” terminals on the 1145-2 Daughter Board.

4)The ignition module will start an ignition spark at the pilot and apply 24 volts across the pilot valve.

5)Once a pilot is established, the pilot flame will act as a diode, converting AC current at the pilot electrode to a half wave DC current at the pilot’s ground strap. This DC current flows through the boiler to the “GND” terminal on the ignition module.

6)Once the ignition module detects the presence of a pilot flame, voltage is applied across the main valve, opening the valve and establishing main flame.

7)If the pilot flame is not established during the trial for ignition period, or if the pilot signal is lost after the main flame is established, the module will de-energize the open pilot valve and main valve (if open) and wait 5 minutes. It will then repeat steps 4-6. If the pilot is still not established, the Alarm contacts on the ignition module will make. This will cause the 1145-2 Daughter Board to break power to the ignition module and illuminate the red LED on the Daughter Board. The ignition module will remain de-energized until the reset button on the daughter board is pressed.

16-325 500506 specifications

The Crown Boiler 16-325 500506 is a highly reliable heating solution designed for residential and light commercial applications. Known for its robust construction and advanced technologies, this boiler is engineered to deliver efficient heating while ensuring longevity and minimal maintenance.

One of the standout features of the Crown Boiler 16-325 is its durable steel construction, which is essential for handling the high temperatures and pressures involved in heating systems. The boiler is typically equipped with a cast iron heat exchanger, known for its excellent heat retention and distribution capabilities. This ensures that the system heats up quickly and maintains consistent temperatures throughout the space.

The boiler's capacity to produce 325,000 BTUs makes it suitable for larger homes or commercial buildings with significant heating demands. Its high input capacity allows for effective operation in areas where traditional systems may struggle to keep up with heating requirements. The Crown Boiler 16-325 employs a forced hot water system, which circulates water through pipes and radiators, providing uniform heat and comfort in indoor spaces.

A significant technological advancement in this model is its integrated control system. The advanced control module automates burner operation, ensuring optimal performance while minimizing energy consumption. This technology not only enhances efficiency but also helps in reducing operational costs, making it a cost-effective choice for users.

Moreover, the Crown Boiler 16-325 is designed with ease of installation and maintenance in mind. It features convenient access panels that simplify the maintenance process, allowing technicians to perform service checks and repairs without extensive downtime. This attribute is particularly beneficial for property managers or homeowners looking for a hassle-free heating solution.

In terms of safety features, the boiler is equipped with a pressure relief valve and a low-water cutoff switch, ensuring safe operation while protecting against potential hazards associated with overheating or lack of water.

Overall, the Crown Boiler 16-325 500506 is a powerful and efficient heating solution that excels in durability and performance. With its advanced technologies, substantial heating capacity, and user-friendly design, it represents an excellent choice for those seeking a reliable heating system that combines efficiency with long-term operational savings.