FILLING THE BOILER

HOW A HOT WATER SYSTEM OPERATES

The entire heating system (boiler, piping, and radiation units) is filled with water. As the water in the boiler

is heated, it is circulated from the top of the boiler through the supply main to the radiation units. The cooler

water in the radiation units flows back through the return piping through the return main into the boiler. This

arrangement provides positive and rapid response to the thermostat.

FILLING THE SYSTEM WITH WATER

OPTION #1 - This method utilizes the boiler piping as shown in the figure on the previous page.

a) Close the main shutoffvalve, isolation valves, and zone valves (if applicable). If bypass piping is

installed, also close the two throttling valves. Leave the boiler service shutoffvalve (if installed) and the

balancing valves to each heating zone fully open.

b)Ooen the following valves in order: the drain valve for power purging, isolating valves before and after the boiler circulator (if applicable), both throttling valves (if applicable), and then open the fill line shutoff valve. Water will fill the bypass piping and push the air through the piping and out the power purging drain valve. When the power purging drain valve runs air free, close the bypass piping throttling valve (leaving the throttling valve to the supply piping f_lly open).

c)Next, ooen the isolation valve (or zone valve) to the first zone. Water will fill the piping and push any air out the power purging drain valve. When the power purging drain valve rims air free, close the isolation valve or zone valve). Repeat this procedure for the remaining heating zones.

d)Once all zones are filled with water and purged of air, shut off valve, open the main shutoff valve, and adiust required.

close the power purging drain valve and fill line the throttling valves and balancing valves as

OPTION #2 - Close the air vents on all radiation units. Open the valves to the radiation units. Make sure

the boiler drain valve, expansion tank drain cock, and the air bleed screw "on the expansion tank drain fitting

are closed. Open the fill valve on the piping to the expansion tank. Open the water inlet to the boiler and

leave it open. Open the air vent on the lowest radiation unit. When all the air has escaped and water starts to flow from the vent, close it. Go to the next radiation unit, and repeat this process until finishing with the

highest radiation unit. If the heating system has automatic vents, this manual venting is unnecessary but it will speed up the proper filling of the system.

If the system is a closed expansion tank system, an automatic fill valve is needed. Leave the automatic fill

valve open to refill the system automatically as needed. Note the initial fill pressure on the boiler's

temperature / pressure gauge, which should be 10-15 psig. Any lowering of the pressure from its initial fill

pressure indicates a loss of water due to leakage. The automatic fill valve should then compensate for this

water pressure loss. If it does not, manually open this valve to refill the system until the needle is again

pointing to the same pressure reading. Instructions are packaged with the valve.

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Kenmore 4EW.90, 3EW.75, 3E W.65, 5EW1.75, 5EW2.00, 5EWL.20, 4EW1.50 Filling the Boiler, HOW a HOT Water System Operates
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5EWL.20, 3E W.65, 4EW.90, 5EW2.00, 4EW1.50 specifications

The Kenmore lineup, featuring models 5EW1.75, 3EW.75, 4EW1.50, 5EW2.00, and 4EW.90, showcases a range of advanced technologies and features designed to enhance performance and efficiency in home appliances. These models highlight Kenmore’s commitment to innovation, aiming to meet the diverse needs of consumers for reliable and functional appliances.

The 5EW1.75 stands out with its efficient energy usage, designed for those who prioritize eco-friendliness without sacrificing performance. This model employs smart technology that optimizes energy consumption, making it not only cost-effective but also environmentally responsible. Additionally, it incorporates intuitive controls, allowing users to adjust settings easily and monitor energy levels in real-time.

Transitioning to the 3EW.75, this model focuses on durability and reliability. Constructed with high-quality materials, it promises a longer lifespan and reduced maintenance costs. The inclusion of quality components ensures consistent performance even under heavy use, appealing to families or individuals who value dependability.

The 4EW1.50, known for its versatility, features multiple settings suitable for various tasks. From quick washes to intense cycles, users can select the ideal program for their specific needs. This adaptability makes it a favorite among busy households. Coupled with a user-friendly interface, the 4EW1.50 encourages ease of use, which is a significant draw for consumers.

The 5EW2.00 takes efficiency to the next level, integrating cutting-edge washing technologies. With a focus on water conservation, this model uses advanced sensors to optimize water usage based on load size and fabric type. Additionally, its noise reduction capabilities ensure that operations remain quiet, a key factor for those in smaller living spaces.

Lastly, the 4EW.90 model blends style and function. With a sleek design, it enhances the aesthetic of any home while providing robust performance. It features modern connectivity options that allow for integration with smart home systems, bringing convenience to everyday tasks.

Together, these Kenmore models represent a balance of innovation, efficiency, and user-focused design. Whether addressing energy use, versatility, durability, or aesthetics, each model brings unique characteristics that cater to the evolving demands of consumers, solidifying Kenmore’s reputation as a leader in household appliance technology.
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