1
Model 390 To the Installer
040419
Section 1 To the Installer
This machine is designedfor indoor use only.
DO NOT install the machine in an area where
a water jet could be used. Failure to follow this
instruction may result in serious electrical shock .

Water Connections

(Water Cooled Units Only)

An adequate cold water supply must be provided wit h
a hand shut--off valve. On the underside of the base
pan, two 3/8” I.P.S. (for single-head units) or t wo1/ 2”
I.P.S. (for double-head units) water connections for
inlet and outlet have been provided for easy hook-up.
1/2” inside diameter water lines should be connected
to the machine. (Flexible lines are recommended, if
local codes permit.) Depending on local water
conditions, it may be advisable t o install a water
strainer to prevent foreign substances from clogging
theaut omatic water valve. There will be only one water
“in” and one water “out” connection. DO NOT install a
hand shut-off valve on the water “out” line! Water
should always flow in this order: first through t he
automatic water valve; second, through the
condenser; and third, through the outlet fitting to an
opentrapdrain.

Air Cooled Units

Air cooled units require a minimum of 6” (152 mm) of
clearance around both sides and 0” at the rear of t he
freezer. This is required to allow for adequate air flow
across the condenser(s). Failure to allow adequate
clearance can reduce the refrigeration capacity of the
freezer and possibly cause permanent damage to the
compressor(s).

Electrical Connections

Each freezer requires one power supply. Check the
data label on the freezer for fuse, circuit ampacity and
electrical specifications. Refer to the wiring diagr am
provided inside of the electrical box, for pr oper power
connections.
In the United States, this equipment isintended tobe
installed in accordance with the National Electrical
Code (NEC), ANSI/NFPA 70--1987. The purpose of
the NEC code is the practical safeguarding of persons
and property from hazards arising from the use of
electricity. This code contains provisions considered
necessary for safety. Compliance therewith and
proper maintenance will result in an installation
essentially free from hazard!
In all other areas of the world, equipment should be
installed in accordance with the existing local codes.
Please contact your local authorities.
Stationary appliances which are not equipped with a
power cord and a plug or other device to disconnect
the appliance from the power sourc e must have an
all--poledisconnect ing device with a contact gap of at
least 3 mm installed in the external installation.
CAUTION: THIS EQUIPMENT M UST BE
PROPERLY GROUNDED! FAILURE TO DO SO
CAN RESULT IN SEVERE PERSONAL INJURY
FROM ELECTRICAL SHOCK!
Beater rotation must be clockwise as viewed looking
into the freezing cylinder of the freezer.
Figure 1
Note: The following procedures should be
performed by a trained service technician.
To correct the rotation on a three-phase unit,
interchange any two incoming power supply lines at
the freezer main terminal block only.
Tocorrect rotation on a single-phase unit, change the
leads inside the beater motor. (Follow diagram printed
on motor.)
Electrical connections are made directly to the
terminal block. The terminal block is locat ed in the
control box located behind the left side panel.