Purging, GAS Meter Size City Gases only

TABLE 3

EQUIVALENT LENGTH OF FITTINGS IN FEET

Pipe Size (IPS)	1	1.25	1.5	2	2.5	3	4
Std. Tee through side	5.5	7.5	9.0	12.0	14.0	17.0	22.0
Std. E11	2.7	3.7	4.3	5.5	6.5	8.0	12.0
45°F E11	1.2	1.6	2.0	2.5	3.0	3.7	5.0
Plug Cock	3.0	4.0	5.5	7.5	9.0	12.0	16.0

WARNING

THE HEATER IS NOT INTENDED FOR OPERATION AT HIGHER THAN 13.8” WATER COLUMN (1/2 POUND PER SQUARE INCH)

SUPPLY GAS PRESSURE. HIGHER GAS PRESSURE REQUIRES SUPPLEMENTAL REDUCING SERVICE REGULATION. EXPOSURE TO HIGHER GAS SUPPLY PRESSURE MAY CAUSE DAMAGE TO THE GAS CONTROLS WHICH COULD RESULT IN FIRE OR EXPLOSION. IF OVERPRESSURE HAS OCCURRED SUCH AS THROUGH IMPROPER TESTING OF GAS LINES OR EMERGENCY MALFUNCTION OF THE SUPPLY SYSTEM, THE GAS VALVE MUST BE CHECKED FOR SAFE OPERATION. MAKE SURE THAT THE OUTSIDE VENTS ON THE SUPPLY REGULATORS AND THE SAFETY VENT VALVES ARE PROTECTED AGAINST BLOCKAGE. THESE ARE PARTS OF THE GAS SUPPLY SYSTEM, NOT THE HEATER. VENT BLOCKAGE MAY OCCUR DURING ICE STORMS.

IT IS IMPORTANT TO GUARD AGAINST GAS VALVE FOULING FROM CONTAMINANTS IN THE GAS WAYS. SUCH FOULING MAY CAUSE IMPROPER OPERATION, FIRE OR EXPLOSION.

IF COPPER SUPPLY LINES ARE USED THEY MUST BE INTERNALLY TINNED AND CERTIFIED FOR GAS SERVICE.

BEFORE ATTACHING THE GAS LINE, BE SURE THAT ALL GAS PIPE IS CLEANED ON THE INSIDE.

TO TRAP ANY DIRT OR FOREIGN MATERIAL IN THE GAS SUPPLY LINE, A DIRT LEG (SOMETIMES CALLED A SEDIMENT TRAP OR DRIP LEG) MUST BE INCORPORATED IN THE PIPING. THE DIRT LEG MUST BE READILY ACCESSIBLE AND NOT SUBJECT TO FREEZING CONDITIONS. INSTALL IN ACCORDANCE WITH RECOMMENDATIONS OF SERVING GAS SUPPLIERS. REFER TO THE NATIONAL FUEL GAS CODE.

To prevent damage, care must be taken not to apply too much torque when attaching gas supply pipes to gas valve inlet.

Apply joint compounds (pipe dope) sparingly and only to the male threads of pipe joints. Do not apply compound to the first two threads. Use compounds resistant to the action of liquefied petroleum gases.

DISCONNECT THE APPLIANCE AND ITS MANUAL GAS SHUTOFF VALVE FROM THE GAS SUPPLY PIPING SYSTEM DURING ANY SUPPLY PRESSURE TESTING EXCEEDING 1/2 PSIG. GAS SUPPLY LINE MUST BE CAPPED WHEN DISCONNECTED FROM THE HEATER. FOR TEST PRESSURES OF 1/2 PSIG OR LESS, THE APPLIANCE NEED NOT BE DISCONNECTED, BUT MUST BE ISOLATED FROM THE SUPPLY PRESSURE TEST BY CLOSING THE MANUAL GAS SHUTOFF VALVE.

BEFORE PLACING THE HEATER IN OPERATION, CHECK FOR GAS LEAKAGE. USE SOAP AND WATER SOLUTION OR OTHER MATERIAL ACCEPTABLE FOR THE PURPOSE OF LOCATING GAS LEAKS. DO NOT USE MATCHES, CANDLES, FLAME OR OTHER SOURCES OF IGNITION FOR THIS PURPOSE.

PURGING

Gas line purging is required with new piping or systems in which air has entered.

CAUTION

PURGING SHOULD BE PERFORMED BY PERSONS EXPERIENCED IN THIS TYPE GAS SERVICE. TO AVOID RISK OF FIRE OR EXPLOSION, PURGE DISCHARGE MUST NOT ENTER CONFINED AREAS OR SPACES WHERE IGNITION CAN OCCUR. THE AREA MUST BE WELL VENTILATED AND ALL SOURCES OF IGNITION MUST BE INACTIVATED OR REMOVED.

GAS METER SIZE – CITY GASES ONLY

Be sure that the gas meter has sufficient capacity to supply the full rated gas input of the water heater as well as the requirements of all other gas fired equipment supplied by the meter. If gas meter is too small, request the gas company to install a meter having adequate capacity.

GAS PRESSURE REGULATOR

DO NOT SUBJECT COMBINATION GAS VALVE TO INLET GAS PRESSURE OF MORE THAN 14 I.W.C. A SERVICE REGULATOR IS NECESSARY IF HIGH GAS PRESSURES ARE ENCOUNTERED.

The gas pressure regulator vent line must be vented to the outside of the building.

POWER BURNER

For information relating to the power burner supplied with this water heater, refer to the power burner manual provided.

LIFTING LUGS

This water heater is supplied with lifting lugs. Prior to lifting, insure that the lugs are threaded into their receptacles as tight as possible.

These lugs may be removed after installation. Sheet metal covers are provided to cover the receptacle openings.

WIRING

The rating plate provides the electrical information needed to size the water heater branch supply circuit.

Typical water heater electrical diagrams are provided in this manual (pages 9 and 10). The actual diagram, corresponding to each water heater, is provided with each water heater, and may differ from the diagrams shown in this manual.

The BTP unit burner is wired to the water heater control compartment as shown in the following diagram. The electrical service should be connected to the N & L Terminals located in the control compartment. Ground from control compartment to suitable ground.

All electrical work must be installed in accordance with the National Electrical Code (latest version) and local requirements. AN ELECTRICAL GROUND IS REQUIRED TO REDUCE THE RISK

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.