Bunn 28222.70006 manual Plumbing Requirements, Adjusting Brew Volumes, Initial SET-UP

PLUMBING REQUIREMENTS

This brewer must be connected to a cold water system with operating pressure between 20 and 90 psi (138 and

620 kPa) from a 1⁄2" or larger supply line. A shut-off valve should be installed in the line before the brewer. Install a regulator in the line when pressure is greater than 90 psi (620 kPa) to reduce it to 50 psi(345 kPa). The water inlet fitting is 1⁄4" flare or female quick connect.

NOTE – Bunn-O-Matic recommends 1⁄4" copper tubing for installations of less than 25 feet and 3⁄8" for more than 25 feet from the 1⁄2" water supply line. A tight coil of copper tubing in the water line will facilitate moving the brewer to clean the countertop. Bunn-O-Matic does not recommend the use of a saddle valve to install the brewer. The size and shape of the hole made in the supply line by this type of device may restrict water flow.

This equipment must be installed to comply with the National Plumbing Code of Canada and the Canadian Food Inspection Agency. For models installed outside Canada, you must comply with the applicable Plumbing/Sanitation Code for your area.

PLUMBING HOOK-UP

NOTE - If a backflow preventer is required by code, a shock arrestor should be installed between backflow pre- venter and dispenser. Installing the shock arrestor as close to dispenser as possible will provide best results.

1.Flush water line and securely attach it to the flare fitting or quick disconnect located on bottom of brewer.

2.Turn on the water supply.

INITIAL SET-UP

CAUTION – The brewer must be disconnected from the power source throughout the initial set-up, except when specified in the instructions.

1.Remove the front panel beneath the sprayhead. Rotate the control thermostat knob fully counterclockwise to the “OFF” position.

2.Connect the brewer to the power source. Water will begin flowing into the tank.

3.When water stops flowing into the tank, rotate the control thermostat knob fully clockwise to the “ON” position and replace the front panel.

4.Wait approximately twenty minutes for the water in the tank to heat to the proper temperature.

5.Place an empty server beneath either of the brew stations. Place its associated Selector switch in the desired position, the On/Off switch in the upper position and initiate a brew cycle.

6.Place the On/Off switch in the lower “OFF” position after water has stopped flowing from the funnel, and check the water volume in the server. It should be 64 oz (1/2 gallon), 128 oz (1 gallon), 196 oz (1-1/2 gallon) 224 oz (1-3/4 gallon) or adjust volume to your company specifications.

7.(A) If not, adjust the timer for that brew station as required. Refer to Adjusting Brew Volumes.

(B)If necessary adjust the needle valve to achieve desired water volume to be bypassed around the coffee fil-

ter

in the funnel.

NOTE: To increase the water bypass turn the needle valve counterclockwise, to decrease the water bypass turn the needle valve clockwise. An adjustment of the needle valve will require a timer adjustment for volume of 1 gallon 1-1/2 gallon or 1-3/4 gallon.

8.Repeat step 7 until the proper water volume is achieved.

9.Repeat steps 5 through 8 for the other brew station.

10.The brewer is now ready for use in accordance with the coffee brewing instructions.

ADJUSTING BREW VOLUMES

CAUTION - Disconnect the power source from the brewer prior to the removal of any panel for the replacement or adjustment of any component.

NOTE: Prior to setting or modifying batch sizes, check that the brewer is connected to water supply, the tank is properly filled, and a funnel and server are in place.

1.Modifying batch sizes. To modify a batch volume, first check that the SET/LOCK switch is in the “SET” position on the circuit board.

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