SERVICE (cont.)

CONTACTOR ASSEMBLY (ELECTRO/MECHANICAL ONLY)

 

 

 

L2T

1L

 

 

4L

L3

T

 

5

T

 

 

 

TL

T

 

 

 

 

FIG. 6 CONTACTOR ASSEMBLY

P2231.35

 

Location:

The contactor assembly is located inside the hood to the right of the overflow cup.

Test Procedures:

Mechanical Thermostat

1.Disconnect the brewer from the power source.

2.Disconnect the white wire or the red wire and the black wire of the contactor coil and disconnect the black wire of the control thermostat from the remaining black wire of the contactor coil.

3.Gently remove the capillary bulb and grommet from the tank.

4.With a voltmeter, check the voltage across the white wire from the terminal block on 120/208, 120/240 volt units or the red wire from 200, 240 volt units and the black wire from the control thermostat when the thermostat is turned clock- wise to the "FULL ON" position. Connect the brewer to the power source. The indication must be: a.) 120 volts ac for three wire 120/208 volt models and three wire 120/240 volt models.

b.) 200 to 240 volts ac for two wire 200 or 240 volt models.

5. Disconnect the brewer from the power source.

If voltage is present as described, proceed to #6.

If voltage is not present as described, refer to the Wiring Diagrams and check the brewer wiring har- ness.

6.Check for continuity between the two black wires of the contactor coil.

If continuity is present as described, reconnect one black wire to the white wire or red wire from the terminal block and the other black wire to the black wire from the control thermostat. Reinstall capillary tube into tank to line 7" above the bulb and proceed to #7.

If continuity is not present as described, replace the contactor.

7.With a voltmeter, carefully check the voltage across the red and black wires on L1 and L2. The indica- tion must be:

a.) 208 volts ac for three wire 120/208 volt models and 240 volts ac for three wire 120/240 volt models.

b.) 200 to 240 volts ac for two wire 200 or 240 volt models.

8.Disconnect the brewer from the power source.

If voltage is present as described, proceed to #9.

If voltage is not present as described, refer to the Wiring Diagrams and check the brewer wiring har- ness.

9.Check for continuity across the terminals on the left side of the contactor by manually closing the contacts. Continuity must not be present when the contact is released.

10.Check for continuity across the terminals on the right side of the contactor by manually closing the contacts. Continuity must not be present when the contact is released.

If continuity is present as described, the contactor is operating properly.

If continuity is not present as described, replace the contactor.

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Image 18
Bunn System III Contactor Assembly ELECTRO/MECHANICAL only, Gently remove the capillary bulb and grommet from the tank
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System III specifications

The Bunn System III is a versatile and efficient commercial brewing system designed for high-demand environments such as cafés, restaurants, and catering operations. Renowned for its reliability and performance, the System III combines advanced brewing technology with user-friendly features to deliver exceptional coffee consistently.

One of the key features of the Bunn System III is its innovative brewing technology, which employs a unique infuser system. This design allows for optimal extraction of coffee flavors by ensuring that hot water is evenly distributed over the coffee grounds, maximizing flavor and ensuring a rich, balanced cup every time. The brewing system can brew up to 3.8 gallons of coffee per hour, making it an ideal choice for busy establishments.

The System III is equipped with an impressive built-in water heater that maintains a temperature of approximately 200°F, which is crucial for brewing coffee at the ideal temperature. This consistent temperature control minimizes the risk of under-extraction or over-extraction, resulting in better-tasting coffee. Additionally, the hot water faucet feature allows users to brew tea or instant beverages on demand, further enhancing the system's versatility.

Another characteristic that sets the Bunn System III apart is its user-friendly interface. The system is designed with intuitive controls, allowing baristas and kitchen staff to operate it with minimal training. The easy-to-read digital display provides critical information such as brew time and water temperature, ensuring that users can monitor the brewing process closely.

Durability is a hallmark of the Bunn System III. Constructed from high-quality materials, this brewing system is designed to withstand the rigors of commercial use. Its robust design ensures longevity and minimizes the need for frequent maintenance, making it a cost-effective choice for businesses.

The Bunn System III also features a large-capacity brew basket, capable of holding ample coffee grounds for high-volume brewing. This basket, combined with the system's efficient design, allows for quick and easy brewing, making it perfect for high traffic situations.

In conclusion, the Bunn System III coffee brewing system is a top choice for commercial coffee operations. Its advanced brewing technology, consistent temperature control, user-friendly features, and durable construction combine to create an exceptional brewing experience. Whether in a café, restaurant, or catering service, the Bunn System III stands out as an indispensable tool for delivering high-quality coffee efficiently.
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