FLOWMETER

The flowmeter (U) serves to measure and display flow volume of the system in a range of 0.5-3.5 US gpm.

It has an integrated restrictor (S) with adjustment valve which allows fine adjustment of the flow volume of the solar installation.

In order to guarantee the flawless function of the measuring device the installation must be flushed and free from foreign substances.

The flowmeter MUST be mounted vertically.

Flow Restrictor

Drain valve (open)

Scale

Figure 29

Always use a flat head screwdriver to adjust the flowmeter.

Figure 30

Read the flow rate from the upper edge of the floating body.

Figure 31

START-UP AND OPERATION OF THE SOLAR PUMP STATION

Observe the following safety instructions when starting- up the solar thermal installation:

LEAK DETECTION

1.Disconnect the expansion tank from the solar system by unscrewing the nut on the tank connector. This prevents the access of dirt particles present in the pipes from entering the expansion tank.

2.Remove the temperature gauges (C, E) and the front cover (D) of the solar pump station.

3.Turn the two isolation ball valves (J, Q) to 45° using an appropriate wrench to allow flow in both directions.

4.Close the drain valve (T).

5.Close the automatic airvent at the collector array (turn the cap clockwise by hand until tight).

6.Connect an air pressure hose to the fill valve (P) below the pressure gauge (O) and open this valve.

7.Using an air compressor or pressurized air tank fill the system with pressurized air until the pressure gauge (O) reads 40 psi then close the fill valve (P).

8.The pressure should hold steady for 15 minutes. If the pressure falls it is an indication of a leak. Find and repair the leak then repeat steps 6 and 7 watching for the pressure to hold at least 15 minutes. After the pressure test slowly open the drain valve (T) to release the air pressure on the system.

FLUSHING

CAUTION

Solar thermal installations cannot be completely emptied after flushing. There is a danger of frost damage if water is used for flushing. Only use water to flush the system when the outside temperature is above 32° F, otherwise use the solar fluid to flush making sure to filter any debris before final filling.

Use a water / propylene glycol mixture as a solar fluid (maximum 50% propylene glycol).

9.Disconect the air pressure hose from the fill valve (P)

10.Connect a water hose from a water source with at least 40 PSI supply pressure to the fill valve (P).

11.Connect a discharge hose to the drain valve (T) and open this valve. Place the other end of the discharge hose into an appropriate drain.

12.Turn the supply ball valve (Q) to 90° (horizontal) so that the valve is closed.

13.Turn the slot of the flow restrictor (S) to the horizontal position using a flat head screwdriver. The integrated ball valve is now closed and will prevent debris from entering the pump.

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American Water Heater 318281-000 Flowmeter, START-UP and Operation of the Solar Pump Station, Leak Detection, Flushing
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318281-000 specifications

The American Water Heater 318281-000 is a highly regarded product in the realm of residential water heating, providing a perfect blend of efficiency, reliability, and advanced technology. Designed to deliver hot water conveniently and effectively, this model is suitable for various home sizes and needs.

One of the standout features of the 318281-000 is its energy efficiency. This water heater is built to comply with stringent energy regulations, helping households reduce their utility costs without compromising on performance. It typically features a high Energy Factor (EF) rating, indicating more efficient energy use for heating water. This technology not only helps in saving on energy bills but also contributes to environmental sustainability by reducing the carbon footprint of the home.

The 318281-000 employs advanced insulation techniques that minimize heat loss, ensuring that hot water is readily available whenever needed. Its design often includes a high-quality tank with foam insulation, providing better retention of heat and, consequently, more hot water availability.

Moreover, the water heater showcases a robust build quality, often incorporating a glass-lined tank for enhanced durability and protection against corrosion. This feature extends the life of the unit and reduces the need for frequent maintenance. In addition, a sacrificial anode rod is typically included to further prevent rust and enhance tank longevity.

The installation of the American Water Heater 318281-000 is designed to be user-friendly, with flexible venting options and straightforward plumbing requirements. Many models come ready for either natural gas or propane configurations, providing homeowners with choices that suit their specific needs.

Another appealing aspect of this water heater is the availability of modern safety features. It generally includes a pressure relief valve and a temperature dial, making it easier for users to manage and maintain safe operation levels.

In conclusion, the American Water Heater 318281-000 stands out in the crowded water heating market by marrying high efficiency, advanced technology, and user-centered design. Its ability to provide a consistent hot water supply while being environmentally friendly makes it an attractive option for homes looking to upgrade or replace their existing water heating systems. With its blend of durability and smart features, this model is indeed a wise investment for those seeking longevity and efficiency in their home hot water solutions.
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