Plumbing Requirements; Plumbing Hook-Up; Initial Fill & Heat; Liquid Level Control - Bunn HWB Installation & Operating Manual

PLUMBING REQUIREMENTS

This dispenser must be connected to a COLD WATER system with operating pressure between 20 and 100 psi
(0.138 and 0.690 MPa). This water source must be capable of producing a minimum flow rate of 4.5 fl. oz.
(133.1 ml) per second. A shut-off valve should be installed in the line before the dispenser. Install a regulator in
the line when pressure is greater than 100 psi (0.690 MPa) to reduce it to 50 psi (0.345 MPa). The water inlet
fitting is .38" (9.52 mm) flare.
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. At least 18 inches of an FDA approved flexible beverage tubing,
such as reinforced braided polyethylene or silicone, before the dispenser will facilitate movement to clean the
countertop. Bunn-O-Matic does not recommend the use of a saddle valve to install the dispenser. The size and
shape of the hole made in the supply line by this type of device may restrict water flow.
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 prevention 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 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 the dispenser as possible will provide the best
results.
NOTE - Water pipe connections and fixtures directly connected to a potable water supply shall be sized, installed
and maintained in accordance with federal, state and local codes.

PLUMBING HOOK-UP

1. Flush the water line and securely attach it to the elbow fitting on the back of the dispenser.
2. Turn on the water supply.
INITIAL FILL & HEAT
1. Turn on the water supply and connect the dispenser to the power source.
2. Open the front door and place the ON/OFF/NIGHT switch in the "ON" (upper) position.
3. Turn main power switch "ON". Water will automatically flow into the tank to the proper level and then shut-
off. This will take less than ten minutes.
4. Fill the hopper(s) with the dry product to be dispensed.

LIQUID LEVEL CONTROL

The system automatically maintains the hot water tank's level by energizing the refill solenoid when the water
level drops below the liquid level probe. If the system has not successfully refilled in 10 minutes, a refill error
occurs. When a refill error occurs, the refill solenoid is de-energized. Once the cause of the refill error has been
investigated and cured, the system can be reset by either turning main power off 5 seconds then turning on, or
unplugging for 5 seconds, or by entering one of the program modes (see Programming, page 17.)
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