A.O. Smith ATO-705AN Remote Controller, A. O. Smith On-Demand Gas Water Heaters, Product Features

In Use Indicator Light

A.O. Smith On-Demand Gas Water Heaters

Endless Hot Water. Endless Innovation.

Remote Controller

All models come with a Remote controller that can set the temperature within a specific range.

Temperature Display

Shows the temp setting

Error Codes

When a fault is detected an error code flashes at the temperature setting

Indicates hot water is being supplied (a tap is open)

Priority Indicator

Indicates that this controller is setting the temperature

Priority Button

Priority can be changed to another controller if desired

Trust the innovation leader to give you more choices in on-demand water heating. A. O. Smith’s comprehensive

Thermostat	On/Off Button
Increases/decreases temp setting
	Will turn the water heater on/off

Model Selection Guide

line supplies endless hot water when you ask for it...with high efficiency that saves money on both residential and commercial applications.

Ground water temperature factor.

The temperature of incoming ground water (cold water inlet temperature) varies greatly throughout the U.S. and also fluctuates with change of season. The temperature of water as it enters the water heater will determine the amount of “temperature rise” required to achieve the desired hot water outlet temperature (120°F is recommended).

Average Ground Water Temperatures

Product Features:

Innovative Technology

■ Indoor and outdoor installation options

■ Continuous hot water on demand

(up to 9.8 GPM)

■ Whole house water heating solution

■ Direct electronic ignition –

Energy Efficiency

■Up to 84% thermal efficiency, providing significant energy cost savings

Sleek Design

Commercial

Application Features:

• ASME Certified

• Hot water capacity of 0.6 – 9.8 GPM

The best way to measure your incoming ground water temperature is to use a thermometer to measure cold water temperature during the coldest season of the year. To simplify the process, use this map to determine whether your installation location is in the Southern Zone, Central Zone or Northern Zone.

SOUTHERN ZONE	CENTRAL ZONE	NORTHERN ZONE
Average Ground Water	Average Ground Water	Average Ground Water
Temperature: 62°F to 77°F	Temperature: 52°F to 61°F	Temperature: 37°F to 51°F

no pilot light

■ On-board diagnostics and

safety monitoring

■ Interior sealed combustion

(does not use interior combustion air)

■ Applicable for residential hydronic

heating applications

Excellent Performance

■12-year limited warranty on heat exchanger, 5-year warranty on all parts

■Can be installed outdoors, saving valuable indoor square footage

■Smooth pleasant lines and rounded corners

■Matching pipe cover available for finished appearance

• Min. – Max. input: 19,000 – 237,000 BTU

• Max. temperature: 185°F with

Commercial Controller

• Ideal for small restaurants, multifamily

housing, hair salons and spas,

laundromats, car washes and other

limited commercial needs

Peak hot water demand.

The next step is to determine how much hot water will be required during the busiest usage period (“peak demand”). To use the chart, consider all appliances and fixtures that use hot water including lavatory faucets, kitchen faucets, washing machines, dishwashers, showers and bathtubs. Be sure to determine how many appliances and fixtures will be used at the same time (“peak demand”).

Appliances or fixtures		Ground Water Temperature Zone
in simultaneous use
during peak demand	Southern Zone		Central Zone	Northern Zone
1	305 or 505		305 or 505	305 or 505
2	305 or 505		305 or 505	305 or 505
3	505 or 705		(2) 505 or 705	(2) 505
4	(2) 505	(2) 505		(2) 505
5	(2) 505	(2) 705		(2) 705
6 or more	Multi-system		Multi-system	Multi-system

*Note: This selection guide is based on 120°F outlet water temperature.