LP Gas Only, Explosion Hazard | A.O. Smith Water Heater manual

LP Gas Only

Explosion Hazard

Have a qualified person make sure L.P. gas pressure does not exceed 13" water column.

Examples of a qualified person include: licensed plumbers, authorized gas company personnel, and authorized service personnel.

Failure to do so can result in death, explosion, or fire.

Liquefied petroleum gas is over 50% heavier than air and in the occurrence of a leak in the system, the gas will settle at floor level. Basements, crawl spaces, closets and areas below ground level will serve as pockets for the accumulation of gas. Before lighting an L.R gas water heater, smell all around the appliance at floor level. If you smell gas, follow the instructions as given in the warning on the front page.

When your L.P. tank runs out of fuel, turn off the gas at all gas appliances including pilot lights. After the tank is refilled, all appliances must be re-lit according to their manufacturer's instructions.

Table 1

Natural Gas Pipe Capacity Table (Cu. Ft./Hr.)

Capacity of gas pipe of different diameters and lengths in cu. ft. per hr. with pressure drop of 0.3 in. and specific gravity of 0.60 (natural gas).

Nominal	Iron Pipe					Length	of Pipe, Feet
Size, in.	10	20	30	40	50	60	70	80	90	100	125	150	175	200
112	132	92	73	63	56	50	46	43	40	38	34	3!	28	26
3/4	278	190	152	130	115	105	96	90	84	79	72	64	59	55
1	520	350	285	245	215	195	180	170	160	150	130	120	110	100
1-1/4	1050	730	590	500	440	400	370	350	320	305	275	250	225	210
1-1/2	1600	1100	890	760	670	610	560	530	490	460	410	380	350	320

After the length of pipe has been determined, select the pipe size which will provide the minimum cubic feet per hour required for the gas input rating of the water heater. By formula:

Cu. Ft. Per Hr. Required=

Gas Input of Water Heater (BTU/HR) Heating Value of Gas (BTU/FT 3)

The gas input of the water heater is marked on the water heater data plate. The heating value of the gas (BTU/FT 3) may be determined by consulting the local natural gas utility.

Table 2

LP Gas Capacity Table

Maximum capacity of pipe in thousands of BTU per hour of undiluted liquefied petroleum gases (at 11 inches water column pressure). Based on a pressure drop of 0.5 inch water column.

Nominallron	Pipe				Length	ofPipe,	Feet
Size, in.	1__0_____Z0_______5_0_						7__	.__SD____9_0___l__L0_0___.J25_1__15_D_
1/2	275	189	152	129	114	103	96	89	83	78	69	63
3/4	576	393	315	267	237	217	196	185	173	162	146	132
1	1071	732	590	504	448	409	378	346	322	307	275	252
1-1_	2205	1496	1212	1039	913	834	771	724	677	630	567	511

Example: Input BTU requirement of the water heater 100,000 BTUH.

Total pipe length, 80 feet = 3/4" IPS required.

Additional tables are available in the latest edition of the "National Fuel Gas Code", ANSI Z223.1.

Water Heater specifications

A.O. Smith is a renowned name in the water heating industry, celebrated for its commitment to innovation, quality, and efficiency. Their water heaters are designed to cater to a wide variety of needs, making them suitable for both residential and commercial applications. The main features of A.O. Smith water heaters are tailored to ensure optimal performance, convenience, and reliability.

One of the standout characteristics of A.O. Smith water heaters is their impressive energy efficiency. Many models are equipped with advanced insulation technologies that minimize heat loss, allowing users to save on energy bills while ensuring a consistent supply of hot water. The introduction of high-efficiency gas burners and electric heating elements enhances their energy utilization, which is reflected in their excellent Energy Factor ratings.

A.O. Smith also incorporates smart technology in its water heaters. Many models feature integrated Wi-Fi connectivity, allowing homeowners to monitor and control their water heating system remotely via a smartphone app. This capability enables users to adjust temperature settings, receive maintenance alerts, and track energy usage, providing a new level of convenience and control.

Durability is another hallmark of A.O. Smith water heaters. Constructed with high-quality materials, these units often feature a glass-lined tank that enhances corrosion resistance. Additionally, many models are designed with a robust anode rod that helps prevent rusting, extending the lifespan of the heater and ensuring dependable service for years to come.

Safety features are also a priority for A.O. Smith. Many water heaters come equipped with advanced safety mechanisms, such as automatic shut-off valves, temperature controls, and flame failure detection systems, ensuring safe operation and reducing the risk of accidents.

Different models are available to suit varying space requirements and preferences. A.O. Smith produces traditional tank water heaters as well as modern tankless options, which provide endless hot water on demand, making them ideal for homes needing high hot water consumption. Their versatility guarantees that customers can find the perfect solution tailored to their specific needs.

In conclusion, A.O. Smith water heaters represent a blend of innovation, efficiency, durability, and safety. With various models available that cater to different heating needs and preferences, A.O. Smith continues to remain a trusted choice for consumers seeking reliable hot water solutions.