Repair B502 HVAC, Elevator, and Roof Sources Sought

Repair B502 HVAC, Elevator, and Roof: Roof: - A. Remove existing plastic snow retention devices. - B. Remove rust and adhesive where old snow retention devices were removed are missing. - C. Refinish all areas where snow retention devices previously were in accordance with the roof manufacturers approved system for restoring Galvalume and polyvinylidene coating (approx. 320 SF). - D. Evaluate the need for snow guards and/or fences in cold climates, considering roof slope and anticipated snowfall, and provide design for guards over entryways, pedestrian walkways, and parking areas. Also, provide guards where one roof eave is above another roof. On roofs with slopes of 10:12 or greater, install a snow fence at the eave. Continuous snow guards around the building perimeter and above all roof penetrations are required. - E. Design and install snow retention system with ice guards (minimum quantity approx. 320 LF). HVAC: - A. Remove existing N 60 ton chiller #2. - B. Replace N 60 ton chiller #2 with new Trane Model CGAM 052F 2Q02 AXD2 A1A1 A1AX XA1C 1A2X XXXX XA1A 3A1D 1XXC XXWX 52 ton nominal chiller with R-410A refrigerant. The new chiller must be comm 5. Include 143 gallon non-ASME load tank, heat trace and insulation, 5 year compressor parts warranty. - C. Install new wires, add chiller plant controls, and ensure that all of the points are tied into the front end of the Energy Management and Control System (EMCS) in B615 and set up graphics for new chiller #2. Test to verify all comm links are operational and function as designed. HVAC Tower: - A. Replace ¾ inch capped hose adapter ball valve on level 6. - B. Repair leak at circuit setter on level 6. - C. Repair heater connections at CUH-3 on level 4. - D. Fill system with proper level of glycol concentration to protect from freezing down to +10 degrees F. Elevator: - A. The contractor shall not begin demolition of the existing elevator until submittals for the replacement elevator are approved by the Government and the new elevator, components and equipment required for installation are on-site. - B. Remove existing seven (7) story elevator system. - C. Replace seven (7) story elevator with new current production model elevator. The new elevator shall have a minimum capacity of 2500 lbs, a minimum velocity of 350 feet per minute (fpm) and capable of minimum four (4) stops (1st, 3rd, 5th and 7th floors). - D. The elevator controls must integrate with the fire alarm system in accordance with National Fire Protection Association (NFPA) 72 and Unified Facilities Criteria (UFC) 3-600-01. - E. The contractor shall minimize the downtime of the elevator to the maximum extent possible. - F. Provide elevator manufacturer life-cycle (20 years) replacement wearing parts.

Division 07 -	Thermal and Moisture Protection, Dampproofing and Waterproofing, Thermal Protection.
Division 14 -	Conveying Equipment, Elevators.
Division 23 -	Heating, Ventilating, and Air Conditioning (HVAC).