ASHE_15_1063_SOW_June_2016.doc

Date: June 2016

U.S. AIR FORCE

31ST FIGHTER WING

31ST CES/CENM

AVIANO AIR BASE, ITALY

TECHNICAL SPECIFICATIONS FOR

ASHE 15-1063

SUSTAIN HVAC SYSTEM, BLDG 1173,

AREA F, AVIANO AB, ITALY

1. SCOPE OF WORK

The Contractor shall furnish all manpower, equipment, materials and transportation to:

· Replace the main chiller unit.

· Installation of secondary Chiller unit (furnished by US Gov).

· New distribution pipeline for the chilled water.

· Furnishing and installation of 18ea fan coil units and associated pipelines.

· General maintenance of 2ea existing Air Treatment Units (ATU).

2.

WORK SITE CONDITIONS

2.a.

Works must be performed inside a restricted area.

It can be required to work on Saturday.

Construction will be divided in two phases; as first phase is completed, Contractor can start 2nd phase.

During the execution, the Contractor must guarantee the continuity of service of Government personnel working inside the building.

2.b The Contractor is permitted to use reasonable quantities of available electricity and water at the work site. The Contractor shall alter characteristics and shall observe conservation practices at all times. All connections shall be the responsibility of the Contractor including restorations to initial conditions. Interruption of utilities: Utilities shall not be interrupted until approval is received from the Contracting Officer. Any such need shall be requested in writing by the Contractor at least 10 days in advance of the needed interruption. Requests for utility interruption shall indicate the type of utility to be interrupted, the type of operation requiring the interruption, date and duration. To the maximum extent possible interruption shall be scheduled on week ends or U.S. holidays in order to minimize impact to base activities.

2.c.

Work during week-ends or holidays may be requested by the Contractor with a minimum of 10 days advance notice, however the Contracting Officer has the right to deny such request if reasons requiring week end and holiday work are not valid or for security or other necessities.

2.d.

Toilet facilities in the vicinity of the work site shall be available for Contractor use. The Contractor shall use facilities in a manner to maintain their state of cleanliness and hygiene.

2.e.

If welding is to be performed the Contractor shall ensure a welding permit is obtained from the Aviano Air Base Fire Department prior to performing welding operations.

2.f.

The Contractor shall not use base refuse containers to discard debris. All construction debris shall be discarded by the Contractor off base at authorized sites according to category of debris/refuse in strict observance of all host country laws, decrees and local regulations in force.

2.g.

The Contractor shall be responsible for ensuring all personnel engaged in the performance of this contract observe all host country laws concerning safety and in particular Italian laws D.M. 81/08.

2.h.

Before works start, contractor will submit a detail works schedule to C.O. for coordination and approval.

3. WORK DESCRIPTION

EACH ITEM OF THE SCHEDULE IS INCLUSIVE OF FURNISHING AND INSTALLATION OF MATERIALS AND EQUIPMENT, SCAFFOLDING, TRANSPORTATION TO DUMP OR STORAGE OF DEMOLISHED AND/OR REMOVED MATERIALS, IN ACCORDANCE WITH CONTRACTING OFFICER'S INSTRUCTIONS AND ALL FINISHING WORK REQUIRED TO MAKE EACH ITEM COMPLETE IN A WORKMANLIKE MANNER.

ALL THE QUANTITIES THAT ARE INDICATED OR SUCCESSIVELY ADDED, ARE ESTIMATES. THEREFORE THE GOVERNMENT SHALL BE NOT HELD RESPONSIBLE FOR THE ACCURACY OF THE ESTIMATED QUANTITIES. THE CONTRACT REQUIRES A COMPLETED PROJECT ON A LUMP SUM BASIS. IT IS THEREFORE THE RESPONSIBILITY OF THE CONTRACTOR TO CALCULATE, FORESEE AND PERFORM ALL QUANTITIES AND WORK NECESSARY EVEN IF NOT MENTIONED IN THE SPECIFICATIONS BUT INCLUDED IN THE DRAWINGS OR MANIFESTLY NECESSARY TO DELIVER A COMPLETE PROJECT BASED ON ITS OVERALL SCOPE.

3.1 New Main Chiller unit

a. Complete removal of existing chiller unit and associated pipeline. Disposal as per Italian law. Save existing twin pumps L.S.

b. Furnishing and installation of 1ea new Chiller unit with the following characteristics:

· Eurovent certified

· Cooling only.

· Screw type compressors without inverter.

· Type Carrier 30XA702 or similar approved.

· Cooling capacity 654 Kw.

· Tumble exchanger (scambiatore a fascio tubiero)Evaporator protected with aluminum cover.

· Interface control “Pro-Dialog Plus” or equivalent.

· Communication card for existing DDC system, including any update of existing software.

· For winter use at -20 deg.

· Anti-freezing protection on the evaporator side with electrical resistance.

· Anti-vibrating supports.

· Work includes removal of existing pipeline and restoration of insulation aluminum cover.

· Installation of 2ea drainage valves.

· Installation of 2ea main valves on supply and return pipes.

· First starting made by Manufacture authorized technician.

1 EA.

c. Electrical works consisting of:

· Replacement of existing 400A main thermal magnetic switch sized as per new Manufacture electrical data.

L.S.

d. Hydronic group.

· Hydronic group must be designed in accordance with Chiller technical specification; The system must work at -20 deg.

· Galvanized storage tank capacity 2000 Lt.

· Anti-corrosion protection.

· Aluminum cover for outdoor installation.

· Thermal insulation 10 cm thick.

· Threaded connections with Diameter > or = of the Chiller outlets.

· Twin pumps as required by Chiller Manufacture technician suitable for outdoor.

· Pumps must have galvanized metal roof

· Complete of associated electronic controls.

· Plastic piping system.

L.S.

3.2 New secondary Chiller unit (Government furnish)

a. Installation of 1ea new Chiller unit furnished by U.S. Air Force with the following characteristics:

· Carrier Aquasnap.

· Model 30RBS-100B0018-PE.

· Serial no. M2014052729.

· Construction year 2014.

· Cooling capacity 100 Kw.

· For winter use at -20 deg.

· Anti-freezing protection on the evaporator side with electrical resistance.

· Anti-vibrating supports.

· Work includes transportation of the unit from area C in Aviano

· new pipeline must have insulation30 mm thick with aluminum cover for outdoor installation.

· Installation of 1ea drainage valves.

· Installation of 2ea main valves on supply and return pipes.

· First starting made by Manufacture authorized technician.

1 EA.

b. Electrical works consisting of:

· New electrical feeding line and new thermal-magnetic breaker sized as per Manufacture electrical data. To be installed near the new breaker for the main chiller.

L.S.

c. Hydronic group.

· Hydronic group must be designed in accordance with Carrier Chiller technical specification; The system must work at -20 deg.

· Galvanized storage tank capacity 500 Lt.

· Anti-corrosion protection.

· Aluminum cover for outdoor installation.

· Thermal insulation 10 cm thick.

· Threaded connections with Diameter > or = of the Chiller outlets; No reductions.

· Twin pumps as required by Chiller Manufacture technician suitable for outdoor.

· Pumps must have galvanized metal roof

· Complete of associated electronic controls.

· Plastic piping system.

L.S.

3.3 New Plastic Pipeline system.

a. Removal of existing pipeline and disposal; save pumps and controls.

b. Contractor shall provide a shop drawing (scheme) for approval before to start works.

c. Installation of new plastic pipeline starting from both chillers to the new fan coils on suspended ceiling:

· Type “ Aquatecnic- Fusio-technic Blu Pipe” or equivalent approved suitable for chilled water .

· Certified UNI EN ISO 15874-2, 15874-5 e DIN 8077 e 8078

· All accessory component of the same Manufacture.

· 100% Final design approved by Manufacture technician.

· Accurate Thermal insulation to avoid condense leaking, Black foam, closed cells, 30 mm thick.

· Covered with aluminum for outdoor and gray PVC for indoor

· No rubber elastic joints.

· Piping support system calculated as per Manufacture data.

· Welding/assembly method as per manufacture data.

d. Flanged connections starting from 75mm Dia. For ball valves, pumps, gate valves etc. with adequate supports.

e. New manifolds (collettori) same material of piping.

f. New valves for the new piping system.

g. New Temperature and pressure gauges IP65.

h. Including any electrical work necessary for a workmanlike .

i. Re-use existing twin-pumps as necessary.

L.S.

3.4 New 4tubes Fan coils (18ea).

a. Removal of existing Fan-coils, associated cooling pipeline and disposal; Save existing heating and drainage pipeline to be re-connected to the new fan-coils.

b. New cooling water pipeline, same materials as described in Para 3.3.c.

c. Contractor shall provide a shop drawing (scheme) for approval before to start works.

d. Installation of new Fan-coils on suspended ceiling cm 60x60:

· Type Sabiana Sky Star SK 36, Box type, for suspended ceiling cm 60x60.

· 4tubes, double coil.

· Capacity: Heat 3.53 KW with 0.5 Lt; , cool 4.53KW with 1.7 Lt.

· Increase cooling coil.

· Accessorized with fresh air intake.

· 2WAY valve, On-Off.

· 4ea ball valves.

· Condense drain pump.

· Modification of existing electrical feeding line.

· Accessorized to connect existing Fresh-air duct.

· Work includes adequate supports on the ceiling.

· Modification as necessary of existing heating pipeline to fit the new fan-coil.

18EA.

3.5 New Room Thermostats, wall mounting (10ea).

a. The new Room thermostat shall control one or multiple fan-coils.

b. Control of On-Off 2WAY valves.

c. 3-Speed fan.

d. Work includes electrical wiring in plastic conduit, digital control cables.

10EA.

Project # ASHE 15-1063

Technical Specifications Date: June 2016

31CES/CENM

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