Questions answered Bldg.80 Handling Units.docx

Solicitation # W50S9321R0005 BLDG. 80 Air Handling Units Questions Received from bidders as of 2-24-21:

1- We need the photos of the existing unit model and its conditions example:

a. Pipe diameters

b. Valve types: Tree way or Two Way

c. Controls

· Answer; Refer to attached Reference no 1

2- For the unit that would be to replace the turbine McQuey indicates that they need the model plate because the one that was seen with that number, they cannot quote it if they cannot provide the information, we would have to return to the site to find more information about unit. Would it be possible to make another visit if necessary?

· Answer: Our apologies, unfortunately we cannot grant your firm chance for a re-visit the site without having everyone that attended that day the same opportunity.

3- Please provide Plans of existing HVAC conditions and proposed work to be done.

· Answer; Refer to SOW Paragraph 5.0 Requirements 4- Please provide Existing 5-Ton Air Handlers to be replaced.

· Answer; Refer to attached Reference no 1 5- Please clarify Scope. Scope of work indicates that two (2) 5-Ton Air Handlers are to be replaced. On the site visit we were indicated that only one (1) 5-Ton Air Handler was to be repaired and 1 Fan Coil Unit to be replaced. If scope has changed, please amend Solicitation, provide damage equipment details, and repair to be performed, and fan coil details.

· Answer; Refer to SOW paragraph 5.1 and 5.2 6- Will there be any disconnect switches, electrical wiring, control wiring, and ductwork to be replaced?

· Answer; Refer to SOW paragraph 5.1.3 7- Linear Distance between each 5-Ton Condensing Unit to be replaced and Evaporator

· Answer; No information available 8- Any Anti corrosive treatment to be applied? If so, what standard should it comply with?

· Answer; Yes, Provide and apply anticorrosive treatment with the following Laboratory Testing rates results:

· ASTM B 117 Salt Chamber – 6,000 hours (aluminum)

· ASTM G 21 Fungal Growth – Zero (0) Growth

· ASTM D 4060 Taber Abrasion (CS-10 Wheel @ 1000 Cycles) – 12.5 mg loss 9- Please clarify if bid bond or payment and performance bond is required for this solicitation.

· Answer; None necessary.

10- For the repair of the air handler (ahu-3) in building 80: will the motor and the fan of the same be changed? Or just the fan?

· Answer; Refer to SOW Paragraph 5.2 11- Please provide all the technical data of the fan and electric motor or the model of the air handler (ahu-3) of the building 80. ( voltage, phase, amperage, static pressure , cfm, etc)

· Answer; Refer to attached Reference no. 2 12- For the machine that is located in the bathroom of the building 80, please send the photos and the complete information (technical data) of the air handler. To be able to quote similar to the existing one and which brand do you prefer?

· Answer; Refer to attached Reference no. 1 13- Manufacture and installation the junction at TDC insulated of supply and return. Please provide picture and specification of junction

· Answer; Refer to attached Reference no. 1 14- Replace disturbed gypsum board. Do you refer to put back in place the existing gypsum board when finished work?

· Answer; No, replace with new gypsum board 15- Install acoustic ceiling tile 2x2 ft (only at the urinal & toilet area). Please elaborate more on this matter and provide photos.

· Answer; Refer to SOW 16- What is the space/volume of the building needed to be conditioned?

· Information not available 17- What temperature is needed?

· 68° f to 70° f 18- What humidity is needed?

· 40% to 60% max.

19- Contract completion time is 90 calendar days. Equipment procurement is in the order of 10-12 weeks, is this time excluded from the 90-calendar day completion?

· Answer: No, however it would be taken under consideration to re-evaluate set delivery dates before due date for the receipt of offers (March 9, 2021) 20- Is payment bond and performance bond applicable?

· Answer: None necessary 21- Please provide photos of the work area, access to the work area and photos of the A/C model inside the bathroom.

· Answer; Refer to attached Reference no. 1 22- Does existing ductwork has to be clean and sanitize?

· Answer; Yes, KTR shall clean and remediate the ductwork to remove all mold/mildew/fungal growth. (approx. 162 LF)

Reference no. 1

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