HomeMy WebLinkAbout2011 CON Green Mechanical - Change Order #2 Chiller ReplacementCALIFORNIA
l`T1ON L CITY
INCORP ORATSO
National City Chiller Replacement Project CHANGE ORDER NO. 2
Specification #11-01 November 29, 2011
Contractor: Green Building Technologies, Inc. dba Green Mechanical Contractors
Reason/Purpose for this Change Order:
Since the air -side conversion/upgrade will not be complete in time for the new chiller plant commissioning some
of the controls that were to be installed as part of the air -side project are needed now to control parts of the
chiller plant. The work that is being done with this change order is essentially being moved from the scope of
'the air -side of the project to the chiller scope and will not be temporary or wasted. The air -side of the project
could not be completed in time due to a change in the design phylosophy which will now be more efficient and
,effective from the original Honeywell design.
The City of National City and Contractor agree to the following change to the original Contract:
For the lump sum price of $49,826.00 the Contractor shall add Civic Center Chiller Replacement Controls as
follows: 1) Add required Honeywell DDC Control points for two new chilled water pumps VFD interface, 2)
Provide software to modify pump operating schedule. 3) Provide software to eliminate simultaneous running of
pumps. 4) Provide software to interface with City provided chilled water system. 5) Provide differential pressure
sensor for chilled water loop. 6) Provide pneumatic demolition of existing airlines for chilled water valves on
AHU's. 7) Provide DDC controls to provide supply and outside air sensors for chilled water valve control to
replacement of existing pneumatic controls for three AHU's in rooftop penthouse. 8) Provide DDC controls to
provide supply and outside air sensors for chilled water valve control to replacement of existing pneumatic
controls for two AHU's in basement equipment rooms. 9) Interface with new Chillers to be Via BACnet or Lon.
10) Interface with new VFD's (pumps only) to be hard wired. 11) Provide and install conduit, wiring and
terminations. 11) Programming (software and graphics). 12) On -site Training — 4 hours. 13) Restoration of any
existing improvements that are destroyed or disturbed.
Original Contract Amount
Net change by previously authorized Change Orders
Subtotal
Amount of this change order
New contract amount
Working days added: 0
Submitted by:
Working days subtracted: 0
415,038.00
(1,000.00)
414,038.00
49,826.00
Percent change in Contract to date 11 76%
Proj:. rwag : r Date City Pr
A.. ov: by
Citngineer' ® Date CityMena g AL. rardrChange Orders >$24999 /Da
By signing this Change Order the Contractor confirms that he/she is completely familiargirly- s terms and conditions and has fairly negotiated
its price, terms and conditions. If this Change Order is approved, Contractor will provide all of the equipment, materials and labor necessary to
provide a complete work as described above at that the price stated herein. Additionally, Contractor confirms that the price is fair and complete
and represents all costs associated with the work, including but not limited to all equipment, materials, labor, supervision, overhead, fees,
bonds, insurance, pr. , etc. and that there will be no further compensation. All of the terms and conditions of the original contract documents
463,864.00
are incorporated h
Accepted an`reed jlby Green Mechanical Contractors:
Name: Jua
Note to Contracts If you &o agree with this Change Order you may be directed to proceed with this work under the terms of the contract
and you may proceed under otest You must comply with the contract requirements of submitting a written protest to protect your claim.
Originals: City Clerk, Contractor
cc: Engineering project file, Project Manager
1243 National City Boulevard, National City, CA 91950
Telephone (619) 336-4380
OFFICE OF THE CITY CLERK
1243 National City Blvd.
National City, California 91950
Michael R. Della, CMC - City Clerk
619-336-4228 phone / 619-336-4229 fax
GREEN MECHANCIAL CONTRACTORS
Change Order #2
Chiller Replacement Project
Judy Hernandez (Engineering) Forwarded
Copy of Change Order to Contractor