Troubleshooting

BURNER AIR OPENINGS OR VENTILATION GRILLES FOR COMBUSTION AIR. REMOVE LINT ACCUMULATION FROM AIR INTAKE GRILL.

At least annually, contact a qualified service agency for burner cleaning and other routine maintenance.

To test gate for operation, gently tap gate and observe. DO NOT OIL.

The red solid fuel tabs supplied with the draft regulator must be removed (See instructions supplied with Draft Regulator).

CLEANING FLUES-COF & COBT ONLY

The following describes how to gain access to the tank flues for cleaning if necessary.

1.Turn off the heater electrical disconnect switch.

•The switch on the outside of the control compartment may be used.

2.Remove the vent connector from on top the heater.

3.Remove the jacket top from the heater by taking out the screws and lifting it off.

•The insulating pad should then be lifted out.

4.Take out the screws holding the flue gas collector top to the tank and lift off.

5.The flue baffles may now be removed by lifting out.

•The flue baffles are flexible enough to bend for removal within headroom.

6.Using a wire brush, remove soot from flue passages in heater tank.

CAUTION

While cleaning tank flue passages, care must be taken that brush does not come in contact with the combustion chamber lining as damage could occur.

• If burner flue collector flange gaskets are damaged, replace.

VENT SYSTEMS

Examine the vent system every six months for obstruction and/or deterioration of vent piping. Remove any soot or obstructions and replace damaged vent piping.

BAROMETRIC DRAFT CONTROL

The heater is equipped with a double acting barometric draft control. The damper gate must pivot freely in the ring guides.

FIGURE 3

NOT ENOUGH OR NO HOT WATER

1.Be certain the electrical disconnect switch serving the water heater is in the ON position.

•The outside of the control compartment and the power burner housing also have switches.

2.Check the fuses

•The electrical disconnect switch usually contains fuses.

3.The capacity of the heater may have been exceeded by a large demand for hot water.

•Large demands require a recovery period to restore water temperature.

4.Colder incoming water temperature will lengthen the time required to heat water to the desired temperature.

•If the heater was installed when incoming water temperature was warm, colder water creates the effect of less hot water.

5.Look for hot water wastage and leaking or open hot water faucets.

6.Sediment or lime scale may be affecting water heater operation. Refer to MAINTENANCE for details.

7.Heater or burner may be dirty.

•Clean all heater flue pipes and flue connector, see

MAINTENANCE.

•Have burner properly cleaned and readjusted.

8.Burner may not be firing at proper rate.

•Check gas pressure, see burner manufacturer’s instruction manual.

9.Burner fan wheel may be dirty.

10.Draft regulator may be stuck.

• Check to see if vane swings freely. Clean, if vane is stuck.

11.Reset button or burner flame safeguard primary control has operated.

WATER IS TOO HOT

1.Water temperature control may be set too high.

2.If lowering the control setting does not reduce the water temperature, contact your dealer.

BTP-140-140, BTPN, BTP-140-140 thru 600-2500, COF, COBT specifications

A.O. Smith, a renowned leader in water heating technology, offers a range of high-efficiency commercial boilers, including the COBT, BTP-140-140 through BTP-600-2500, BTPN, and COF models. Designed to cater to diverse heating needs, these systems are engineered for optimal performance, reliability, and efficiency, making them ideal for various applications, from hospitality to industrial processes.

The A.O. Smith COBT model stands out for its innovative features, such as a fully modulating burner that adjusts output based on demand, enhancing energy efficiency and ensuring consistent comfort. Its compact design allows for easy installation in limited spaces, while robust construction materials ensure longevity. The integrated controls offer real-time monitoring and diagnostics, allowing operators to maintain peak performance and reduce maintenance costs.

The BTP series, particularly the BTP-140-140 through BTP-600-2500, delivers high heating capabilities with a range of output options. These models feature a sophisticated heat exchanger design that maximizes heat transfer efficiency while minimizing energy consumption. The use of dual-fuel capability provides flexibility, allowing users to switch between natural gas and propane, thus enhancing operational resilience. The BTP units are also equipped with advanced modulating burners that adapt to varying load conditions, further optimizing fuel usage.

For applications requiring enhanced performance, the BTPN models offer additional features like integrated pumps and a larger footprint for increased capacity. This makes them ideally suited for high-demand environments where consistent hot water supply is critical. The COF model complements this lineup, focusing on oil-fired applications and delivering reliability across diverse operating conditions.

In terms of technology, A.O. Smith utilizes cutting-edge combustion systems and advanced control technologies that not only enhance efficiency but also meet stringent emission standards. The incorporation of condensing technology in many models enables users to harness latent heat from flue gases, significantly improving overall system efficiency.

Overall, A.O. Smith's COBT, BTP, BTPN, and COF models are engineered with a commitment to quality, efficiency, and user-friendliness. Their reliability, advanced technologies, and versatile applications make them a preferred choice for businesses looking for durable and efficient heating solutions. Whether for commercial or industrial needs, A.O. Smith continues to set the standard for water heating systems.