TB Wood's WFC1000 Series Installation, Operation And Maintenance Instructions Download Page 15

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SECTION 2

INSTALLATION AND ENCLOSURE DIMENSIONS

2.1 General Rules for Installation

Improper installation of the inverter will greatly affect its life. Be sure to observe the following points when
selecting a mounting location.

A. Do not install the inverter in a place subjected to high temperature, high humidity, or excessive vibration.

(Consult Table 1.4 for temperature, humidity and maximum vibration limits.)

B. Mount the unit vertically and do not restrict the airflow to the heat sink fins on the back of the control. The

fan and fins allow cooling of internal components. Any air restriction could greatly reduce the life of the
inverter, as well as resulting in nuisance over temperature trips.

C. The WFC

generates heat. Allow sufficient space around the unit, as shown in the illustration. If mounted

in an enclosure with other equipment, be sure to allow at least five (5) inches of space on each side for
adequate ventilation.

D. For totally-enclosed chassis models (fins inside the enclo-

sure), consult TB Wood’s Incorporated for enclosure sizing
and mounting instructions.

E. Do not mount the WFC

near heat generating equipment or

in direct sunlight.

F. Explosion proof Applications – Part of the criteria for an

explosion proof rating is that the motor is designed and
tested to ensure that its outer surface temperature does not
exceed prescribed levels. These limits can be easily
exceeded if the motor is operated from an AC inverter. A few
manufacturers of explosion proof motors have received UL

certification for their products when used on AC inverters.
These motors have very strict operating speed limits and
other disclaimers to protect the companies in case an
accident occurs involving their product. Explosion proof
motors that are not rated for inverter use lose their
certification when used for variable speed. Due to the many
areas of liability that may be encountered when dealing with
these applications, the following statement of Company
Policy applies:

TB Wood’s Incorporated AC Inverter products are sold for suitability with explosion proof AC motors rated
for use with PWM inverters. These motors must be UL listed for use with either TB Wood’s AC inverters or
with PWM inverters and used within the specified speed ranges and carrier frequencies. TB Wood’s
accepts no responsibility for any direct, incidental or consequential loss, cost or damage associated with
the misapplication of our AC products in these applications. In any misapplication, the purchaser expressly
agrees to assume all risk of loss, cost or damage that may arise. TB Wood’s Incorporated will not
knowingly approve the application of their AC inverters with motors not rated for such applications.

G. Line Starting – WFC

is designed to provide controlled starting and stopping of AC motors by use of the

keypad or external contacts connected to the control terminal strip. WFC

may also be started by applying

AC power to terminals L1, L2, and L3. The inverter has line-start-lockout as a standard feature, to prevent
automatic starting when line power is applied. This provision can be defeated by appropriate programming.
The inverter may be started once every two minutes in this mode.

H. Chassis Model Installation -- The Chassis style WFC

series is shipped with the keypad attached to the

inverter, but it can be removed and attached to an enclosure front cover or remote station (See Section
6.2). Note: CE specifications require that any system component housed within an enclosure,
cannot have an attached operator control. Therefore, the keypad must be removed from the
inverter and attached to an enclosure panel to maintain CE compliance in these cases.

FIGURE 2.1

THAN

5 IN.

THAN

5 IN.

THAN

5 IN.

THAN

5 IN.

W F C

H T

A C