Bunn 428220001E service manual Plumbing Requirements, Plumbing Hook-Up, Optional Drain Hook-Up

PLUMBING REQUIREMENTS

These brewers must be connected to a cold water system with operating pressure between 20 and 90 psi (138 and 620 kPa) from a ½˝ 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 ¼˝ flare fitting. Bunn-O-Matic does not recommend the use of a reverse-osmosis or deionized water supply to this equipment.

NOTE - Bunn-O-Matic recommends ¼˝ copper tubing for installations of less than 25 feet and 3⁄8" for more than 25 feet from the ½˝ water supply line. A tight coil of tubing in the water line will facilitate moving the brewer to clean the counter top. 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.

A water filtration system must be installed for brewers used in hard water areas.

As directed in the International Plumbing Code of the International Code Council and the Food Code Manual of the Food and Drug Administration (FDA), this equipment must be installed with adequate backflow pre- vention to comply with federal, state and local codes. For models installed outside the U.S.A., you must comply with the applicable Plumbing /Sanitation Code for your area.

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

Plumbing Hook-Up

1.Flush the water line.

2.Securely attach ¼˝ water supply line to the el- bow.

3.Secure cord and water supply line under the retainer strap in any of the three locations as needed. (Only 1 strap included)

4.Turn on the water supply.

Optional Drain Hook-Up

1.Remove drip tray and the chrome plug from the base.

2.Drill out the auxiliary outlet of the drip tray with a ½˝ drill bit.

3.Secure ½˝ hose to drip tray, routing it through the opening in the base assembly.

4.Connect hose to drain line as needed.

5.Install drip tray.

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