6)Start the boiler. Immediately take a smoke. If any smoke is present, open the air adjustment to obtain a zero smoke.

NOTE

The ODV boiler is equipped with a ceramic combustion chamber. On initial start-up, the binder on this chamber will burn out, possibly resulting in a yellow spot on smoke paper. This binder should burn out in approximately 30 minutes of operation and should not reappear. Successive smoke readings taken over this 30-minute “burn-out” period should result in decreasing amounts of yellow on each smoke spot.

7)Allow boiler to warm up for about 15 minutes or until the binder has completely burned out of the combustion chamber. Adjust the air to obtain a CO2 between 11.0% and 12.5% with a zero smoke. If a zero smoke cannot be obtained in this range of CO2s, see “Service Notes” on page 18.

8)Cycle the boiler several times to make sure that the light-offs are smooth and reliable.

9)Allow the boiler to fire until the water temperature reaches the high limit setting. Confirm that the high limit shuts down the burner.

10)Confirm that the thermostat/s cycle the burner and the appropriate circulator/s and/or zone valves.

11)Recheck the piping for leaks. Repair any leaks found at once.

12)Inspect the vent system for flue gas leaks. Repair any leaks found before leaving the boiler in operation.

X Service Notes

1)The pressure switch on the ODV is designed to protect the boiler against blockages in the vent or intake piping. The electrical contacts on this switch are connected to “T-T” on the burner’s primary control and are normally closed. This pressure switch is equipped with an orifice on the negative pressure side of so that the blockage must be present for several seconds before the switch shuts down the burner.

In the event that a blockage appears in either side of the vent/ intake piping, the pressure switch will open the burner after a delay of 10 –60seconds. The burner will go into post purge and then shut down. After a delay of approximately 4 seconds it will go into pre-purge. If the block- age is still present, the burner will cycle in and out of pre-purge at intervals of approximately 20 seconds until the blockage is removed or power to the burner is interrupted.

Each size ODV boiler has a different pressure switch setting:

Model

Switch Contacts Open on Pressure Rise

ODV-75

0.23

+/- 0.025” w.c.

ODV-100

0.305 +/- 0.025” w.c.

ODV-125

0.45

+/- 0.025 “ w.c.

Route the 1/8 silicone tubing shipped wrapped over the intake collar along the left side of the jacket to the hose barb on the 7 x 4 adapter. Use the cable clamps provided to attach this hose to the left side jacket panel. Figure 23 shows the pressure switch tubing connections.

20

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Crown Boiler ODV-75, ODV-100, ODV-125 manual Service Notes
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ODV-75, ODV-100, ODV-125 specifications

Crown Boiler Company is renowned for producing high-quality heating solutions, and their ODV series is no exception. The ODV-125, ODV-100, and ODV-75 models are part of this advanced product line, designed for residential and light commercial applications. These models exemplify Crown Boiler's commitment to innovation, performance, and efficiency.

One of the main features of the ODV series is its unique vertical design, which helps in optimizing space in various settings, making them ideal for installations where space is at a premium. Each model is engineered to provide reliable heating with output capacities of 125, 100, and 75 MBH respectively. This range allows homeowners to select a unit that best meets their specific heating demands, ensuring comfort without unnecessary energy expenditure.

Technology plays a crucial role in the performance of the ODV series. The units are equipped with stainless steel burners that provide enhanced durability and efficiency. These burners are designed to achieve high combustion efficiency, minimizing fuel consumption and reducing emissions. Additionally, the ODV models feature an integrated electronic ignition system which ensures a reliable start-up and reduces the wear and tear associated with traditional standing pilot systems.

When it comes to construction, the ODV series units are built with a heavy-duty steel casing that provides excellent thermal insulation. This design not only contributes to the efficiency of the boilers but also ensures quiet operation, making them suitable for residential environments. The corrosion-resistant heat exchanger further enhances longevity, providing homeowners with peace of mind regarding their investment.

Another characteristic that sets the ODV series apart is its versatility. These boilers can be configured for use with multiple heating applications, including hot water supply and radiant heating systems. The ODV models also feature easy access to internal components for maintenance and servicing, which is a significant advantage for HVAC professionals.

In summary, the Crown Boiler ODV-125, ODV-100, and ODV-75 models represent the pinnacle of residential heating technology. With their efficient design, advanced burner technology, and ease of maintenance, these units are sure to provide reliable performance for years to come. Whether for a cozy home or a light commercial space, the ODV series offers a solution that balances comfort, efficiency, and durability.
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