SEQUENCE OF OPERATION

BOILER LESS TANKLESS COIL:

Aquastat high limit controller:

The aquastat control's high limit contacts open and turn offthe burner when the boiler water temperature reaches the control's high limit set point. The high limit contacts automatically reset after the boiler water temperature

drops past the set point by 10°F, which is a fixed differential.

INTERNAL WIRING FOR HONEYWELL AOUASTAT L8148A

IKI

JUMPE_

IK2

--UNE "¢OI.T_E

-- CLa_ I,

)

When the thermostat controls call for domestic space heating. The sequence of operation for the burner

and circulator is as follows:

1.Thermostat calls for heat, completing circuit between terminals T & T on the aquastat controller, energizing the 1K relay coil.

2.With the 1K relay coil energized, contacts 1K1 and 1K2 are closed. Terminals C1 and C2 are energized

providing power to the circulator. Terminal B1 is energized, providing power to the oil burner primary control. This, in turn, powers the ignition coil and burner motor.

3.With the primary control energized, the burner operation starts and remains running as long as the cad cell

senses flame. In the event of flame failure or the flame is not fully proven within the trial for ignition period, the primary control will lockout and open the burner circuit. This will require a manual startup of the burner.

4.As long as flame is proven through the cad cell relay, the burner will remain on until the circuit is interrupted

by the boiler water temperature reaching the aquastat's high limit setting (opening high limit contacts BR), or

the thermostat is satisfied breaking the T-T circuit.

5.If the boiler water temperature reaches the aquastat's high limit setting, the high limit contact BR is de-

energized turning the burner off. However, the circulator pump will continue to run, as long as, the thermostat calls for heat.

6.After the high limit contact BR is de-energized, the boiler water temperature must fall 10°F below the

aquastat's high limit setting for the high limit contacts BR to close and energize the burner.

7.When the thermostat is satisfied, the call for domestic space heating is ended. Relay coil 1K is de-energized,

opening 1KI and 1K2 contacts. Both the burner and circulator pump operation stop.

33

Page 34 Page 36
Page 35
Image 35
Kenmore 4EW.90, 3EW.75, 3E W.65, 5EW1.75, 5EW2.00, 5EWL.20, 4EW1.50 owner manual Sequence of Operation Boiler Less Tankless Coil
Page 34 Page 36

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.
Top Page Image Contents