Components

Manual • Installation • Start-Up • Usage • Maintenance • Parts

Figure 9

Recirculation components

Figure 10 Recirculation connection at water heater

1Circulator — Little flow is required to maintain a temperature in the piping. Size of circulator depends on minimum flow requirements of the tempering valve.Minimum flow rates of the tempering valve must be maintained.

2Aquastat — Used to control the on-off position of the circulator.Aquastat is set 5° to 10° lower than mixed water outlet of the mixing valve (#7). The circulator cannot run continuously as bypass through the mixing valve will eventually allow the temperature on the piping to climb to the water heater temperature during draw periods.

3– 6 Check valves — Assure the flow of water in one direction. Each check valve func- tions as follows: #3 and #4 prevent bypass in the event of pressure drop, #5 prevents thermal siphoning of hot water to the cold water supply,#6 prevents flow of cold water to the tempered water supply.A draw of tempered water will not result in flow of cold water into the return loop.

Operation

•During period of normal use (fixtures on) — Circulator is off.There is no flow through #6, there is flow through #5 equal to the flow at the fixtures, there is flow through #3 and/or #4 equal to flow at fixture.

•When all fixtures are off — Circulator is off. There is no flow through #3, #4, #5 or #6. Water temperature in piping is cooling.

•When temperature at aquastat #2 falls 10° below temperature to be maintained

— Circulator is on. There is flow through #6 equal to the minimum required by the mixing valve,flow through #3 and #4 equals the flow of the circulator.There is no flow through #5.

•Aquastat reaches temperature — Circulator is off. There is no flow through #3, #4, #5 or #6.

Problems

•Missing check valves #3 or #4 — Extreme pressure drop can cause reverse flow of water; hot to cold supply or cold to hot supply.

•Missing check valve #5 — Hot water can migrate from the water heater back through the cold water supply.

•Missing check valve #6 — Cold water can be forced back through the tempered water supply when a fixture is opened.

•No aquastat #2 — Pump runs continuously. Small amount of water will pass through mixing valve. Eventually all hot water is flowing through valve. Recirculated water through cold port, hot water through hot port.

•Circulator too small — Mixing valve performance erratic.

Part Number PLUS-E017-A/1206

PLUS-E017-A/1206 specifications

The Weil-McLain PLUS-E017-A/1206 is a high-performance heating boiler that reflects the brand's commitment to quality engineering and advanced technology. This model is renowned for its efficiency and reliability, making it a preferred choice for both residential and commercial heating applications.

One of the standout features of the PLUS-E017-A/1206 is its exceptional efficiency rating. The boiler employs advanced condensing technology, which allows it to utilize the latent heat in exhaust gases. This means it can achieve efficiency levels of over 90%, significantly reducing energy consumption and lowering utility bills. The unit also complies with stringent regulatory standards, making it an environmentally friendly heating solution.

The PLUS-E017-A/1206's compact design is another significant characteristic, allowing for easy installation even in limited spaces. It is built with durable materials that enhance its longevity and efficiency. The sleek appearance of the unit also makes it suitable for various settings, maintaining aesthetic appeal while delivering powerful heating performance.

This boiler is equipped with advanced controls and a user-friendly interface, offering precise temperature management and efficient operation. The control panel showcases a digital display, enabling easy monitoring of system performance. Additionally, it allows for integration with smart home systems, providing users with enhanced control over their heating systems remotely.

Safety features are paramount in the PLUS-E017-A/1206. It includes multiple safety mechanisms designed to prevent overheating and pressure issues, ensuring worry-free operation. These elements, combined with Weil-McLain’s reputation for durable construction, contribute to the boiler’s overall reliability.

The PLUS-E017-A/1206 is designed with ease of maintenance in mind. It features accessible components that can be easily serviced, minimizing downtime and reducing maintenance costs. With Weil-McLain’s extensive network of support, users can rely on expert assistance when needed.

Overall, the Weil-McLain PLUS-E017-A/1206 is a robust heating solution that combines efficiency, safety, and advanced technology. Its range of features makes it an excellent choice for those seeking a dependable boiler that delivers consistent performance and energy savings. Whether for a home or business, the PLUS-E017-A/1206 represents a smart investment in heating technology.