Special Applications

Combination Space Heating/ Potable

Water System

Some water heater models are equipped with inlet/outlet tappings for use with space heating applications. If this water heater is to be used to supply both space heating and domestic potable (drinking) water, the instructions listed below must be followed.

·Be sure to follow the manual(s) shipped with the air handler system.

·This water heater is not to be used as a replacement for an existing boiler installation.

·Do not use with piping that has been treated with chromates, boiler seal or other chemicals and do not add any chemicals to the water heater piping.

·If the space heating system requires water temperatures in excess of 120°F, a tempering valve or an anti-scald device should be installed per its manufacturer’s instructions in the domestic (potable) hot water supply to limit the risk of scald injury.

·Pumps, valves, piping and fittings must be compatible with potable water.

·A properly installed flow control valve is required to prevent thermosiphoning. Thermosiphoning is the result of a continuous flow of water through the air handler circuit during the off cycle. Weeping (blow off) of the temperature and pressure relief valve (T & P) or higher than normal water temperatures are the first signs of thermosiphoning.

·The domestic hot water line from the water heater should be vertical past any tempering valve or supply line to the air handler to remove air bubbles from the system. Otherwise, these bubbles will be trapped in the air handler heat exchanger coil, reducing the efficiency.

·Do not connect the water heater to any system or components previously used with non-potable water heating appliances when used to supply potable water.

Some jurisdictions may require a backflow preventer in the incoming cold water line. This may cause the temperature and pressure relief valve on the water heater to discharge or weep due to expansion of the heated water. A diaphragm-type expansion tank suitable for potable water will normally eliminate this weeping condition. Please read and follow the manufacturer’s instructions for the installation of such tanks.

Also see “Water System Piping” (Page 12) for additional instructions on the safe and correct installation and operation of this water heater.

Figure 15: Space Heating Piping Installation

Domestic	Must Be Vertical To Remove
Hot Water	Air Bubbles
Out	Cold
Tempering	Cold
Valve	Water		Flow Control
	Inlet	Pump	Flow Control
	Inlet		Valve
Hot			Valve
Hot
Water		Out		In
Out				In
Unions	To		Coil
	To
	Air
	Handler
			Air
			Handler
	Shut Off Valve

Typical tempering valve	Massachusetts Code
installation Combination space	does not allow this type
heating/ potable water heating system	of installation.

Solar Installation

If this water heater is used as a solar storage heater or as a backup for the solar system, the water supply temperatures to the water heater tank may be in excess of 120°F. A tempering valve or other temperature limiting valve must be installed in the water supply line to limit the supply temperature to 120°F.

Note: Solar water heating systems can often supply water with temperatures exceeding 180°F and may result in water heater malfunction.

IMPORTANT: Water supply to this heater must not exceed 180°F. Water temperature in excess of 180°F will cause the High Limit Control to open and shut off the gas supply to the unit. The High Limit Control is a single use type that will require the replacement of the thermostat before the burner will operate.

6510238 specifications

The American Water Heater 6510238 is a noteworthy model in the realm of home water heating solutions. Designed to meet a wide range of domestic hot water demands, this water heater combines efficient performance, advanced technology, and user-centric features.

One of the standout characteristics of the 6510238 is its exceptional energy efficiency. This model is equipped with an advanced insulation system that minimizes heat loss, allowing the unit to maintain optimal water temperatures while using less energy. This not only contributes to reduced utility bills but also aligns with environmentally conscious practices, making it an attractive choice for eco-minded households.

The 6510238 features a high first-hour delivery rating, ensuring that it can meet the hot water needs of busy households without significant wait times. This is largely due to its powerful heating elements, which provide rapid recovery and heating capabilities. Homeowners can enjoy hot showers, clean dishes, and other hot water requirements without the fear of running out.

Another notable aspect of the American Water Heater 6510238 is its durable construction. It is built with a heavy-duty tank that is designed to resist corrosion and extend the lifespan of the unit. Additionally, its glass lining offers extra protection against sediment buildup, further enhancing durability and efficiency.

The unit also incorporates advanced safety features, including a temperature and pressure relief valve, which provides peace of mind to users. This safety mechanism helps prevent the risk of overheating or over-pressurization, ensuring safe operation in various conditions.

Installation and maintenance of the 6510238 have been simplified for user convenience. The water heater is designed with easy-access panels, allowing for straightforward maintenance and service when required. This user-friendly design reduces the time and effort needed for upkeep, making it a preferred option among homeowners.

In summary, the American Water Heater 6510238 stands out with its combination of energy efficiency, high performance, durable construction, and user-friendly features. These characteristics make it a reliable and efficient solution for any household in need of consistent hot water supply. Whether it’s for daily showers, laundry, or cleaning, this water heater is built to deliver optimal performance while ensuring safety and longevity.