Basic Documentation

Disclaimer: These are sample drawings and sequences. Designers are responsible for
finalizing the content for their particular projects.
c. Environmental operating conditions: 0 to 40 
°C, 0 to 1000 m
sea level, less than 95% humidity, non-condensing.
d. Enclosure shall be rated UL Type enclosures or as specifically mentioned
elsewhere.
F. All VFDs shall have the following standard features:
1. All VFDs shall have the same customer interface, including digital display, and
keypad, regardless of horsepower rating. The keypad is to be used for local
control, for setting all parameters, and for stepping through the displays and
menus. The keypad shall be removable, capable of remote mounting and have
its own non-volatile memory. The keypad shall be capable of uploading and
downloading of parameter settings as an aid for start-up of multiple VFDs.
2. The keypad shall include Hand, Auto, and Stop selections. When in “Hand”, the
VFD will be started and the speed will be controlled from the up/down arrows.
When in “Off”, the VFD will be stopped. When in “Auto”, the VFD will start via an
external contact closure and the VFD speed will be controlled via an external
speed reference. The drive shall incorporate “bumpless transfer” of speed
reference when switching between “Auto” and “Hand” modes.
3. All circuit boards shall be varnished to meet IEC 60068-2-60 Method 1 and be
able to withstand hydrogen sulfide (H2S) and sulfur dioxide (SO2)
4. A built-in time clock shall be housed in the keypad. The clock shall have a
battery backup with 10 years minimum life span, The clock shall be used to date
and time stamp faults and record operating parameters at the time of fault.
5. The VFD shall have start-up wizards visible on the keypad for quick access to
application macros specifically designed to facilitate start-up.
6. The user shall be able to define any parameter as a favorite via the keypad.
7. The VFD shall have cooling fans designed to be replaced without removing the
VFD from the wall or removing the VFD enclosure. The cooling fan shall operate
for a period of 10 years before it is replaced.
8. The VFD shall include capacitors which do not require conditioning prior to
installation. The VFD shall be capable on an infinite shelf life and immediate out
of box installation.
9. The VFD shall operate only when require. The user shall have the ability to
choose additional cooling fan controls.
10. The VFD shall monitor and display via the keypad nine (9) parameters at one
time without the need to scroll through multiple screens. Each parameter shall
be user defined. The following is a sample of the parameters which can be