SERVICE (cont.)

TANK HEATER (all Models)

FMD DBC-3 shown

FIG. 50 TANK HEATER

P4102.40

 

Location:

 

The tank heater is located inside the tank and secured to the tank lid.

Test Procedure:

1.Disconnect the dispenser from the power source.

2.With a voltmeter check the voltage across the black and white wires 120 volt or 240 volt models or black and red wires for 120/208 volt models or 120/240 volt models. Connect the dispenser to the power source. The indication must be:

a)120 volts ac for two wire 120 volt models;

b)208 volts ac for three wire 120/208 volt models.

c)240 volts ac for three wire 120/240 volt models and two wire 240 volt models.

d)230 volts ac for two wire 230 volt models.

3.Disconnect the dispenser from the power source.

If voltage is present as described, proceed to #4.

If voltage is not present as described, refer to the dispenser wiring diagram and check the wiring harness.

4.Disconnect the black wire and the white or red wire from the tank heater terminals.

5.Check for continuity across the tank heater terminals. If continuity is present as described, reconnect the wires, the tank heater is operating properly.

If continuity is not present as described, replace the tank heater.

NOTE - If the tank heater remains unable to heat, remove and inspect heater for cracks in the sheath.

Removal and Replacement:

4.Disconnect the black wire and the white or red wire from the tank heater terminals.

5.Disconnect the pink wire from the liquid level probe.

6.Disconnect the green wire from the tank.

7.Remove the thermostat capillary bulb/temperature probe by firmly pulling up on the capillary at the tank lid. This will disengage the grommet from the tank lid.

8.Remove the ten #8-32 nuts securing the tank lid to the tank.

9.Remove tank lid with limit thermostat, liquid level probe and tank heater as an assembly.

10.Remove the two hex nuts securing the tank heater to the tank lid. Remove tank heater with gaskets and dis- card.

11.Install new tank heater with gaskets on the tank lid and secure with two hex nuts.

12.Install tank lid with limit thermostat, liquid level probe and tank heater on the tank and secure with ten #8-32 hex nuts.

13.Connect water inlet line to the tank lid.

14.Reconnect the black wires to limit thermostat, the pink wire to the liquid level probe and the green wire to the tank. Refer to the limit thermostat and the liquid level board and probe sections in this manual when recon- necting wires.

15.Refer to Fig. 51 when reconnecting the wires to the tank heater.

Resistance Values

120V 7.8 - 9.2 ohms @ 68° - 75°F

240V 15.3 - 17.9 ohms @ 68° - 75°F

WHI or RED to Main

BLK to Limit

Wiring Harness

Thermostat

1.Shut off water supply to the dispenser.

2.Disconnect the water supply tube on the tank lid.

3.Disconnect the black wires on the limit thermostat.

FIG. 51 TANK HEATER TERMINALS

P1218

50

42672 122209

 

Page 49 Page 51
Page 50
Image 50
Bunn FMD-5, FMD-4 manual Tank Heater all Models, WHI or RED to Main BLK to Limit Wiring Harness
Page 49 Page 51

FMD-4, FMD-5 specifications

The Bunn FMD-5 is a state-of-the-art coffee dispenser designed specifically for high-volume coffee brewing situations. This machine is ideal for restaurants, convenience stores, and other establishments that require an efficient and reliable coffee dispensing solution.

One of the primary features of the Bunn FMD-5 is its ability to brew and serve fresh, hot coffee with exceptional speed. The unit is capable of dispensing up to five gallons of coffee per hour, making it an ideal choice for busy environments where customer demand is high. The system utilizes a digital brewer control that allows for precise brewing temperatures and times, ensuring consistency in flavor and quality.

The FMD-5 also incorporates advanced technologies to streamline the brewing process. It features a programmable control panel that allows users to adjust settings based on their specific needs. This includes the ability to set brew cycles, control brew levels, and even program different brew strengths. The easy-to-read digital display shows real-time information, making it simple for operators to monitor the brewing process.

Another notable characteristic of the Bunn FMD-5 is its compact and space-saving design. Despite its robust brewing capacity, the unit is designed to fit easily in various retail and foodservice environments. The machine is also built with durable materials, ensuring longevity and reliability under heavy usage.

For maintenance, the FMD-5 is designed with user convenience in mind. It features removable components and accessible areas for easy cleaning and routine maintenance. Users can also benefit from preventative maintenance features that monitor the machine’s performance, alerting operators to any potential issues before they escalate.

In terms of versatility, the Bunn FMD-5 can accommodate different brewing systems and coffee types, allowing users to customize their offerings based on customer preferences. It supports pre-ground coffee and can also be adapted for different brewing styles, enhancing its usability in various coffee service environments.

Overall, the Bunn FMD-5 is an impressive combination of speed, efficiency, and flexibility, making it an excellent choice for any operation that demands high-quality coffee with minimal wait time. Whether you are serving a morning rush of customers or maintaining a steady stream of coffee through the day, the Bunn FMD-5 stands out as a reliable and efficient coffee dispensing solution.
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