Bunn H5E H5X 5A. TO INCREASE THE TEMPERATURE, 5B. TO DECREASE THE TEMPERATURE, Adjustments

SERVICE (cont.)

Electronic Controls (cont.)

Adjustments

This dispenser can maintain any temperature between 85 and 208°F by selecting and setting one of five vari- able range control potentiometers.

1.Fill the dispenser according to the steps in the Ini- tial Set-up.

2.Select the range containing the desired tempera- ture by plugging the two-pin socket onto the mat- ing connector of one of the range control boards. Both pins must be connected to the socket.

3.Place the tank heater switch in the “ON” position and observe the glowing red indicator near the right edge of the control board. The controller is apply- ing full power to the heater when the indicator is on all the time. The indicator will begin to flash as the temperature nears the set point. The set tem- perature is reached when the indicator flashes only very briefly. The water is hotter than the set tem- perature when the indicator remains off. This ini- tial setting will only be an approximation.

4.Take the temperature of the stream of water imme- diately below the faucet as it flows from the dis- penser with an accurate thermometer. Do not take the temperature of water collected in a container.

5A. TO INCREASE THE TEMPERATURE

Turn the potentiometer screw of the temperature range selected in step 2 in a clockwise direction with a small screwdriver. One full turn of the screw will result in an approximate 1°F change. Allow the temperature to stabilize as described in step 3 and repeat step 4. Continue until the desired water temperature is achieved.

5B. TO DECREASE THE TEMPERATURE

Turn the potentiometer screw of the temperature range selected in step 2 in a counterclockwise di- rection with a small screwdriver. One full turn of the screw will result in an approximate 1°F change. Draw a large quantity of water at the faucet, allow the temperature to stabilize as described in step 3 and repeat step 4. Continue until the desired water temperature is achieved.

NOTE - The entire adjustment span is approximately 25 complete revolutions. The potentiometer will cease to adjust when turned too far in either direction. It is not damaged, simply turn it back a few turns and try again.

85-115°

110-140°

135-165°

160-190°

185-208°

P1775

FIG. 5 TEMPERATURE RANGE SELECTION

15 10420 011599