ENVIRONMENTALLY FRIENDLY TECHNOLOGY

SUPER ABSORPTION

Sequence of cooling operation (DE)

Sequence of heating operation (DE)

Figure 27 illustrates the typical operating sequence of a SANYO DE di- rect-fired absorption chiller / heaters. The NE steam-fired unit does not include the time delays associated with the burner blower, gas valve and ignition functions.

With a chilled water setpoint of 6.7° C and with the chiller/heaters en- abled, the start signal will be energized as the leaving chilled water tem- perature rises to 7.7° C, 1.0° C above setpoint.

The burner initially completes a 36-seconds pre-purge operation that in- cludes gas valve and supply air damper modulation to full open to insure complete purging of the combustion chamber.

The No. 1 absorbent pump flow rate is changed during all stages of op- eration to insure quicker start-up and optimum performance at part load.

Figure 27. Typical combustion time chart (cooling operation)

Start signal

As the cooling load is satisfied with the chiller/heaters at minimum load, the unit will cycle off as the leaving chilled water temperature drops to 5.5° C, 1.5° C below setpoint.

When the microprocessor issues a stop signal, the generator heat source will shut off and the dilution cycle will start. The dilution cycle will last between 6 and 15 minutes depending on generator temperature. The dilution cycle will consist of stopping of the refrigerant pump, absorbent pump(s), and the cooling water pump in turn. The unit is capable of re- starting during the dilution cycle.

Stop signal

Figure 28 illustrates the typical operating sequence of a SANYO DE di- rect-fired absorption chiller/heaters in heating mode.

With a hot water setpoint of 55° C, the start signal will be energized as the leaving heating water temperature drops to 54° C, 1.0° C below setpoint. The burner initially completes a 36-second pre-purge operation that in- cludes gas valve and supply air damper modulation to full open to insure complete purging of the combustion chamber. The No. 1 absorbent pump flow rate is varied during all stages of operation to insure quicker start-up and optimum performance at part load. On chiller/heaters with two ab- sorbent pumps, the No. 2 pump remains off at all times during the heat- ing mode.

Figure 28. Typical combustion time chart (heating operation)

Start signal

As the heating load is satisfied with the chiller/heaters at minimum load, the unit will cycle off as the leaving heating water temperature rises to 57° C, 2° C above setpoint.

When the microprocessor receives a stop signal, the generator heat source will shut off and the dilution cycle will begin. The dilution cycle will last approximately 5 minutes depending on generator temperature. The dilution cycle consists of timed stopping of the No. 1 absorbent pump. The chiller/heaters is capable of restarting during the dilution cycle.

Stop signal

Chiller stop

 

Pre-purge

4

2

8

2

Control

Post-purge

 

36 sec.

sec.

sec.

sec.

sec.

area

12 sec.

Burner

ON

 

 

 

 

 

 

Blower

OFF

 

 

 

 

 

 

Gas control

Open

 

 

 

 

 

 

valve

Close

 

 

 

 

 

 

Ignition

ON

 

 

 

 

 

 

 

OFF

 

 

 

 

 

 

Sol. valve

ON

 

 

 

 

 

 

Ignition gas

OFF

 

 

 

 

 

 

Sol. valve

ON

 

 

 

 

 

 

Main gas

OFF

 

 

 

 

 

 

No. 1 ABSO

ON

 

 

 

 

 

 

pump

OFF

 

 

 

 

 

 

No. 2 ABSO

ON

 

 

 

 

 

 

pump

OFF

 

 

 

 

 

 

Refrigerant

ON

 

 

 

 

 

 

pump

OFF

 

 

 

 

 

 

Approx. 5 min.

Dilution cycle

Approx. 6 -- 15 min.

Chiller stop

 

Pre-purge

4

2

8

2

Control

Post-purge

 

36 sec.

sec.

sec.

sec.

sec.

area

12 sec.

Burner

ON

 

 

 

 

 

 

Blower

OFF

 

 

 

 

 

 

Gas control

Open

 

 

 

 

 

 

valve

Close

 

 

 

 

 

 

Ignition

ON

 

 

 

 

 

 

 

OFF

 

 

 

 

 

 

Sol. valve

ON

 

 

 

 

 

 

Ignition gas

OFF

 

 

 

 

 

 

Sol. valve

ON

 

 

 

 

 

 

Main gas

OFF

 

 

 

 

 

 

No. 1 ABSO

ON

 

 

 

 

 

 

pump

OFF

 

 

 

 

 

 

 

Approx. 5 min.

 

Dilution cycle

 

 

 

Approx. 5 min.

36

37

Page 20
Image 20
Sanyo DE operation manual Stop signal Chiller stop, 36 sec, Ignition gas, Main gas, Pump, Approx min Dilution cycle

DE specifications

Sanyo DE is an innovative line of home appliances and electronics that showcases Sanyo's commitment to quality, efficiency, and user-centered design. This series includes various products, such as air conditioners, refrigerators, and microwaves, all engineered to enhance the everyday living experience.

One of the standout features of Sanyo DE appliances is their energy efficiency. Many models are equipped with advanced technologies that adhere to stringent energy-saving standards, helping consumers reduce their electricity bills while minimizing their environmental footprint. The use of inverter technology in air conditioners, for instance, allows for precise temperature control and significant reductions in energy consumption.

Sanyo DE also emphasizes smart technology integration. Many products come with Wi-Fi capabilities, enabling users to control their appliances remotely via mobile apps. This connectivity makes it easier to monitor energy usage, adjust settings, and receive alerts about maintenance needs. Users can enjoy added convenience as they can pre-heat their ovens or set their air conditioners to the desired temperature before arriving home.

Another key characteristic of Sanyo DE is its focus on durability and reliability. Each product is built with high-quality materials and undergoes rigorous testing to ensure long-lasting performance. The robust construction not only enhances the lifespan of the appliances but also provides peace of mind to users concerning their safety and functionality.

In terms of design, Sanyo DE products are crafted to blend seamlessly into modern homes with sleek and contemporary aesthetics. The intuitive user interfaces are designed for ease of use, featuring clear displays and simple controls, allowing users of all ages to operate the appliances without any hassle.

Furthermore, Sanyo DE pays attention to noise reduction. Many appliances incorporate sound dampening technologies, making them ideal for use in residential settings, where quiet operation is critical. Whether it’s a refrigerator running seamlessly in the background or an air conditioner cooling the room without disruption, Sanyo DE ensures a pleasant home atmosphere.

Overall, Sanyo DE exemplifies a fusion of advanced technology, energy efficiency, and user-friendly design. With a diverse range of appliances, Sanyo DE is committed to enhancing the lives of its users through thoughtful innovation and reliable performance.