substitution request - Alliance Construction Solutions

A. After installation is complete, measure the harmonic voltage and current distortion of each
VFD with the drive assembly in bypass mode, with the VFD running at 50% operating
speed, and with the VFD running at highest operating speed. Take measurements on
each phase (L-L) on the line side (input terminals) of the VFD.
B. If measurements exceed the limits as specified in Part 2, install corrective reactors or filters
at no additional cost to the owner, and retake measurements after corrective equipment is
installed.
C. Include all measurements (before and after installation of corrective equipment) in the
harmonic distortion report. Provide the Engineer with a copy of the harmonic distortion
report.
D. The Harmonic Distortion Test and Report shall be conducted by an approved independent
testing agency.
3.05 VFD NOISE TEST:
A. Measure the dBA sound level of the motor with the drive in bypass mode and with the
drive operating from 25% to 100% speed output.
B. If the measurements exceed the limits specified in part 2, correct as required at no cost to
the Owner, and retake measurements.
C. Report all tests to the Engineer.
3.06 VFD INDUCED SHAFT VOLTAGE TEST:
A. After installation is complete and system is operating under normal conditions, measure
and report any voltage potential between the motor shaft and the motor frame. This test
may occur anytime between substantial completion of the project and the end of the
overall project warranty period. Report findings to the Engineer. Costs for any corrective
measures required shall be included in the bid.
3.07 MECHANICAL WIRING:
A. Provide all temperature control wiring, all interlock wiring, and equipment that is to be
provided under this Division unless specifically shown on Electrical drawings.
B. All line voltage interlock and control wiring shall be not less than No. 14 insulated, color
coded wire in conduit or raceway.
C. Electrical wiring in connection with the automatic temperature control system, where shown
on the Division 26 drawings, shall be performed by the Electrical Contractor. All other
wiring, including 120V required for proper operation of the automatic temperature control
system, shall be performed by the Mechanical Contractor.
3.08 INSTALLATION COORDINATION:
A. Furnish equipment requiring electrical connections to operate properly and to deliver full
capacity at electrical service available.
Project No.: 10145
550 15 th Street Dual Brand Hotel
03/16/2012
23 0513 - 12 MECHANICAL/ELECTRICAL REQ.
FOR MECHANICAL EQUIPMENT