UB–12R OWNER'S MANUAL
NU–VU® FOOD SERVICE SYSTEMS
MENOMINEE, MICHIGAN 49858
(800) 338-9886
SALES FAX (906) 863-5889 • SERVICE FAX (906) 863-6322
page
9
The following steps should be carefully observed while completing the electrical connections:
A. Take note of the labeling on the unit's terminal connections (
L
ine
1
,
L
ine
2
,
L
ine
3
,
N
eutral) at the Power Terminal Block.
B. Carefully identify the power source leads and attach them to the appropriate connection
terminals. Power leads carrying 208 voltage may be attached to any of the
L
ine terminals.
In the case of a 240v three phase power supply the wild leg (240v to neutral) must always
be attached to Line 2 (
L-2
). Make sure all connections are clean and tight.
C. Be sure the unit is properly grounded before use by attaching a grounding wire to the
Ground Lug next to the Power Terminal Block.
D. Carefully set all Controls and Switches on the unit to the
OFF
position and engage the
main power supply.
E. Check the voltage at the Power Terminal Block connections with a voltmeter to confirm
conformity with the unit requirements as listed on the side label. Disengage the main
power supply.
F.
If all voltage readings are correct you may continue with the installation. If the readings
DO NOT coincide with the unit requirements you must call NU–VU® for instructions on
changing the voltage and/or phase of your power source or equipment.
OPTIONAL WATER SUPPLY CONNECTIONS - -
The water connection required for some of the UB–12R options is located at the back of the unit
near the top (refer to Illustration #1 on page 6). This single ¼" connection will supply all the water
that your Oven option(s) may require.
IMPORTANT: NU–VU® strongly recommends that
SOFT WATER ONLY
be used in any unit
requiring a water supply. Also, a good quality water filter MUST be installed in-line between the
unit connection and the water supply to guard against clogging and mineral build-up in the
components. This is extremely important in areas having hard water. This water filter may be
installed in-line at the water source or adjacent to the Water Inlet Fitting on the unit, whichever is
more convenient for you.
Please follow these instructions to install any optional water supply:
A. Run approved copper, plastic or vinyl tubing from the water source to the unit's location
and install a shut-off valve. Allow some slack for final unit positioning and service. Avoid
any kinks or strains on the tubing and place the tubing where it will not be damaged in
any way.
B. The tubing end that attaches to the unit must not be damaged or deformed in any way.
The cut end should be cut straight and clean with no deforming of the tubing. All burrs
and sharp edges should be removed to ensure a proper and leak-free connection.
C. Position the tubing so that the tubing runs straight into the Water Intake Fitting. Be
careful not to kink the tubing if you bend it, and do not bend the tubing within two (2)
inches of the end.
IMPORTANT: IN ANY 240–VOLT
THREE
PHASE SYSTEM THE WILD LEG
(240 VOLTS TO NEUTRAL) MUST ALWAYS BE CONNECTED TO L-2!!!
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