substitution request - Alliance Construction Solutions

Project No.: 10145
550 15 th Street Dual Brand Hotel
03/16/2012
a. 4-20 mA or 0-10 vdc output for VFD speed.
b. 4-20 mA or 0-10 vdc output for VFD load.
F. Minimum Required Standard Features:
1. Door-mounted or visible components:
a. Power-on light.
b. Safety lockout indication.
c. Inverter run indication.
d. Bypass run light.
e. VFD fault indication.
f. 32-Character (minimum) alphanumeric liquid crystal display.
g. Input keypad for parameter input and display selection.
h. Manual speed adjustment means.
i. Hand/Off/Auto VFD selector.
2. Furnish only non-filament type indicating lights.
3. Provide the following features:
a. Adjustable current limit circuit to prevent nuisance tripping during
acceleration or run conditions.
b. Active regeneration limit circuit to prevent nuisance overcurrent tripping
during deceleration.
c. Input power single phasing and/or reverse phasing protection.
d. Minimum and maximum speed adjustments, separate and noninteractive.
e. Power loss restart selectable for Auto Restart in auto mode only.
f. Automatic restart from undervoltage, power failure, or control fault.
g. Critical frequency lockout for up to 2 points, available from 10% to 100%
speed with an adjustable band width.
h. Provide I2t fuses or other protection for power-handling components.
Control shall survive load side short circuits without component failure,
and shall annunciate output phase-to-phase and phase-to-ground faults.
i. Volts-per-hertz ratio shall be automatic, tracking motor load requirements
to achieve most efficient operation within the parameters selected.
4. To reduce possible acoustical noise and electrical interference, drive control shall
have an automatically variable carrier frequency of at least 800 to 2,500 hertz.
There shall be no sudden frequency shifts which cause acoustical noise increases
during shifts in the motor.
5. Control shall be capable of starting into a spinning motor, and also switching
from inverter to bypass back to inverter without tripping off line. Control shall also
be capable of stopping a motor rotating in the reverse direction and then
accelerating that motor in the proper direction.
6. Control shall have a 4 - 20 mADC or 0 - 10 VDC isolated instrument control
signal follower. Isolation shall be either optical or transformer type. The
manufacturer shall include documentation with submittals that confirm the
follower is of the isolated type.
7. All components shall be supplied in an integral NEMA 1 or better metal enclosure;
separate enclosures are not allowed.
8. All drives shall carry ETL or UL nationally recognized testing laboratory approval.
23 0513 - 9 MECHANICAL/ELECTRICAL REQ.
FOR MECHANICAL EQUIPMENT