project specification for replace existing hvac split
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PROJECT SPECIFICATION
FOR
Replace Existing HVAC Split System Units
AT
DJS- Waxter’s Children Center
375 Red Clay Road
Laurel, MD 20724
FOR THE
DEPARTMENT OF GENERAL SERVICES
PROJECT NO: DD-591-210-003
PROJECT CLASSIFICATION – ‘A’
DATE: March 1, 2021
“MINORITY BUSINESS ENTERPRISES ARE
ENCOURAGED TO RESPOND TO THIS SOLICITATION”
STATE OF MARYLAND
DEPARTMENT OF GENERAL SERVICES Ellington Churchill, Jr. SECRETARY
301 WEST PRESTON STREET
BALTIMORE, MARYLAND 21201
BOARD OF PUBLIC WORKS LARRY. HOGAN, GOVERNOR
PETER FRANCHOT, COMPTROLLER
NANCY K. KOPP, TREASURER
DGS PROJECT No. DD-591-210-003
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DIVISION 1 - GENERAL REQUIREMENTS:
1. Scope of Work – DV-591-210-003
A. The successful contractor shall provide all labor, equipment, tools, materials,
insurance, and supplies, etc., required to remove two (2) existing Trane split system
HVAC units and replace the units in kind. Existing units are refrigerant cooled and
heated via boiler. See appendix for reference.
B. The new units shall be installed in the exact location of the pre-existing units using
the existing concrete pad, air ducts and electrical connections as required.
C. All associated refrigerant piping and insulation shall be replaced. No refrigerant
piping and insulation may be reused. Abandoned refrigerant piping, as indicated by
DJS Maintenance personnel, shall be removed. See appendix for reference.
D. The new units shall be connected to existing ductwork; it shall be the contractor’s
responsibility to make ALL measurements required to ensure proper installation with
little or no modifications, to unit or existing ductwork. Contractor shall clean existing
ductwork prior to making new connections.
E. Contractor shall supply new and install new thermostats for each unit as required. The
existing control wiring may be used if compatible to system. It is the contractor’s
responsibility to make the determination if the existing wiring is compatible with the
new system thermostats to be installed.
F. All associated electrical disconnects shall be replaced for a total of four (4)
disconnects. Any abandoned disconnects in the immediate vicinity of the condensing
or air-handling units shall be removed. Any wall penetrations due to the removal of
said disconnects shall be patched and repair as required. Abandoned disconnects will
be indicated by DJS Maintenance personnel.
G. It will be the contractor’s responsibility to determine if the existing electrical supply
will need to be upgraded, i.e., the related circuit breaker is the appropriate amperage.
If the electrical requires an upgrade, the contractor shall include the upgrade in the
base bid.
H. The contractor shall replace all isolation valves to the two (2) new air handling units
on the supply piping and to the return piping to each heating coil. If no isolation
valves exist, the contractor shall install new valves on the supply piping and the
return piping of each heating coil. Valves shall brass and be sized appropriately to the
existing piping.
I. The contractor shall install one (1) “y” style strainer after the newly installed supply
piping ball valves. The strainers shall have a ¾” hose connection, with chain and cap,
for system draining. The strainer shall be installed in an area and in such a way that it
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is easily accessible for maintenance and hose hook up. Combination isolation valve
and strainer will not be acceptable.
Alternate 1: Replace three (3) hot water pumps and the two (2) associated mixing valves in
kind. The contractor is responsible to coordinate with the existing building controls
contractor to properly interface the pumps and mixing valves into the existing building
controls. The contractor is responsible for all measurements to ensure proper installation
to the existing system.
Site Location: Waxter’s Children Center, 375 Red Clay Road, Laurel, MD 20724
NOTE: It is the Contractor’s responsibility to field check/confirm
that ALL new units are compatible with existing ductwork, wiring,
etc. prior to bidding. Submit ALL questions prior to bid.
2. SUMMARY OF WORK:
A. The Contractor shall be responsible for the proper removal and installation of ALL
HVAC equipment associated this project.
B. The Contractor shall comply with ALL applicable Electrical / Mechanical codes that
may apply for the duration of this project.
C. The work shall be done in accordance with the terms, conditions and specifications
include herewith and per applicable regulations and best practices for this type of
project.
D. ALL work shall be accomplished within 90 calendar days from the date designated
by the notice to proceed issued by Department of General Services. Liquidated
damages in the amount of $250.00 per day apply to this contract.
3. SITE INSPECTION:
A. All prospective bidders are encouraged to attend the pre-bid conference and
familiarize themselves with all requirements for the project. Failure to attend the pre-
bid conference will not relieve the successful bidder from complying with the
requirements of these specifications at no additional cost to the State of Maryland.
4. PROJECT MANAGER:
John Ferry
Office: 410-767-4375
Email: john.ferry1@maryland.gov
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5. PRE-BID CONFERENCE/SITE VISIT:
A. Address: Waxter’s Children Center, 375 Red Clay Road, Laurel, MD 20724
B. Date: March 17, 2021
C. Time: 10:00 AM
6. CONTRACTOR QUALIFICATION:
A. The Contractor shall be licensed in the State of Maryland in accordance with
COMAR Regulations. The Contractor shall have a minimum of five (5) years’
experience performing similar projects. Upon request, the contractor shall supply a
list of other similar projects, which have been completed to the Project Manager for
review.
B. The contractor shall provide laborers and supervisors who are thoroughly familiar
with the type of construction involved and the materials and techniques specified.
C. Field Quality Control to be conducted (Owner’s Project Manager) (General
Contractor) (Manufacturers Technical Specialist).
7. GENERAL CONDITIONS:
A. Contractor acknowledges that all information, direction, procedures, etc. provided
in the Department of General Services “General Conditions for Construction
Contracts” are part of this project specification.
B. Any damage, cutting or patching caused by the contractor or his employees or
subcontractors to the facility, i.e., building, contents or grounds, shall be the
responsibility of the contractor and shall be restored to original condition.
C. All removed materials and debris shall be hauled from the site at the contractor’s
expense and disposed of in a legal/ lawful manner on a daily basis. All materials,
supplies, and equipment are subject to the inspection and approval of the DGS
Construction Inspector.
D. Throughout the entire project, the Contractor shall schedule and coordinate all work
with the DGS Department of Construction, to minimize disruption to the facility
operation. At no time shall the entire facility be shut down.
E. All work shall be performed in the best and most professional manner. Contractor
shall maintain the job site in a safe, neat, and orderly manner at all times.
F. Contractor shall ensure that a drug, alcohol and tobacco-free workplace are
maintained on project pursuant to the Governor’s Executive Order mandating it.
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H. The Contractor shall attend a Pre-Construction Meeting prior to work starting at the
project site. Contractor shall attend Progress meetings as requested by DGS and the
Using Agency, per DGS “General Conditions for Construction Contracts”.
I. Security measures under the general direction of the agency and the maintenance
supervisors shall be observed. In this regard, the contractor is expected to cooperate
fully with agency authorities to permit the security of the institution to be
maintained at all times.
8. SPECIFICATIONS:
Existing units to be replaced in kind:
A. Air Handler Unit #1 (building label #3)
a. Make: Trane
b. Model: TWE090A300BB
c. Serial Number: K454SDK5H
B. Condenser Unit #2 (building label #3)
a. Make: Trane
b. Model: TTA120A300BB
c. Serial Number: K4530WDAH
C. Air Handler Unit #2 (building label #4)
a. Make: Trane
b. Model: TWE120B300BB
c. Serial Number: K304LUP5H
D. Condenser Unit #4 (Building Label #4)
a. Make: Trane
b. Model: TTA180B300CB
c. Serial Number: K374Y0MAH
9. SUBMITTALS:
A. Contractor shall submit shop drawings and product data in accordance with
specifications.
B. Contractor shall provide dimensioned plan and elevations as required showing
locations of ALL field connections.
C. Contractor shall provide schematic drawing of control and power systems
indicating points of field connections.
D. Contractor shall furnish ALL installation manuals as required.
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10. EQUIPMENT DELIVERY:
A. ALL units shall be factory assembled.
B. ALL equipment installation shall comply with manufacturer’s standards for
shipping and handling.
11. WARRANTY - HVAC:
A. The HVAC system manufacturer’s initial warranty shall be a minimum of 24 months
from substantial completion.
B. The warranty shall provide for repair or replacement due to material and
workmanship that proves defective within the above period, including refrigerant.
C. The manufacturer shall provide an additional extended non pro-rated warranty for 48
months minimum, parts only, on the compressors.
D. The Contractor shall warrant their work for a period of two (2) years from the date of
Substantial Completion as established by the Using Agency and DGS, per Section
7.14 of DGS General Conditions for Construction Contracts. The Contractor shall
provide the Using Agency and DGS with any manufacturer warranty information and
any manufacturer warranty shall pass through to the Using Agency. Any issues
identified that are related to any work performed as part of this contract during the 2-
year period will be reworked by the Contractor at NO additional cost to the State of
Maryland.
E. The Contractor shall provide to the DGS Inspector ALL warranties, owner’s manuals,
operating information, MSDS, etc., for the equipment and materials used on this
project. All information shall be neatly compiled in a binder and the Contractor shall
provide (2) two copies to the DGS Project Manager. For review and approval, prior to
the Substantial Completion Meeting.
7. ACCEPTANCE:
A. Systems Acceptance will be granted when all of the equipment included in the chosen
vendors’ submittal and subsequent contract bid award is delivered, installed and
configured at Waxter Children’s Center and inspected by DGS.
B. A factory certified technician inspects and starts up the HVAC system and verifies
proper operation.
C. A complete set of operation / service manuals are supplied.
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D. An itemized list of equipment including make, model number, serial number, and
filter list (size(s) and quantity) is submitted to DGS.
a. This list is to be presented in the Excel spreadsheet format provided by DGS.
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BASIS OF AWARD:
1. Base Bid: All items included in Division 01, Section 1, Sub-sections A-H…….$_____________
2. Alternate 1 (pumps and mixing valves): ……………………………………. $_____________
Total Contract Total: ……………………………………………..…...$_____________
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