SERVICE (cont.)

HOT GAS TEMPERATURE SENSOR

ULTRA-2 shown

FIG. 43 HOT GAS SENSOR

Location:

The Hot Gas Sensor is located on the Condenser- to-Compressor tube on the left side of the housing.

Test Procedures:

1.Remove the left side housing panel.

2.Connect a voltmeter, across the two leads of the hot gas sensor (leave plug connected);

The indication must be:

a)Approx. 4.0 vdc @ 37° F

b)Approx. 3.4 vdc @ 82° F

If voltage reading is 0v, the Control Board is not sup- plying the necessart 5v and should be replaced. If the reading stays at 5vdc, replace the hot gas sensor.

Alternate Test:

2.Disconnect the plug on the hot gas sensor leads from the connector on the main harness.

3.Connect an ohmmeter across the two leads of the hot gas sensor;

The indication must be:

a)678 ohms @ 212° F ± 10%

b)10k ohms @ 77° F ± 10%

If resistance reading is not within the range listed above, replace sensor.

Removal and Replacement (Refer to Fig. 43)

1.Remove the left side housing panel.

2.Disconnect the plug on the hot gas sensor leads from the connector on the main harness.

3.Remove the clamp securing the hot gas sensor to Condenser-to-Compressor tube.

4.Securing the new hot gas sensor to Condenser- to-Compressor tube using the clampp previously removed.

5.Refer to Fig. 44 and plug the new sensor into the connector on the main harness.

2

1

FIG. 44 HOT GAS SENSOR

ULTRA-1

ULTRA-2

1- WHI to YEL J10-11

1- WHI to YEL J5-10

(Control Board) Positive

(Control Board) Positive

 

 

2- WHI to WHI/BLK Main Harness/

2- WHI to WHI/BLK Main Harness/

J10-15 (Control Board) Negative

J5-9 (Control Board) Negative

 

 

48

41084 102709

 

Page 48
Image 48
Bunn ULTRA-2 manual HOT GAS Temperature Sensor, Alternate Test

ULTRA-2 specifications

The Bunn ULTRA-2 is an exceptional frozen beverage dispenser that caters to both commercial and home use, making it a popular choice in various establishments such as cafes, restaurants, and convenience stores. Renowned for its reliability and efficiency, the ULTRA-2 serves a wide range of frozen beverages, including slushes, smoothies, and frozen cocktails, providing an irresistible treat for customers.

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