1`9PAT003_Answers_to_ALL_RFIs_02_15_19.docx

70Z08319BPAT00300 Repair HVAC and Electrical Systems UPH/Galley Bldg. S25, U. S. Coast Guard Aviation Training Center, Mobile, AL.

RFI responses 02/15/19

1. There is no mention of any graphics or Automation system front end. What are the requirements other than all of the devices have to be BACnet?

ANSWER: Refer to sheet M701 sequence of controls – general notes number 1.

2. The 3 way head pressure control valve is not mentioned in the sequence of operations. What is the control sequence for the 3 way head pressure control valve on the outside air unit?

ANSWER: The head pressure control valve operation is by the equipment manufacturer. We do not write sequences that take ownership of how a specific manufacturer performs head pressure control for their specific equipment. When other parties direct sequencing of such items (ie head pressure control valve operation) warranties for the equipment are commonly voided.

3. Is the Owner responsible for removing the kitchen equipment to another location to allow for the flooring scope of work to be accomplished?

ANSWER: Contractor will remove and reinstall the kitchen equipment. See attached drawing of existing equipment to removed then reinstalled. The equipment can temporarily be stored on base within a secured government facility. The facility will be within 1 mile from project site.

4. If the Owner removes the kitchen equipment, is the Owner also responsible for the reinstallation of the kitchen equipment after completion of the flooring scope of work?

ANSWER: Yes.

How long can the kitchen be out of service?

ANSWER: 14 Days

5. The existing floor looks to be a urethane concrete. Is any information available on existing floor – manufacturer, specifications, etc.

ANSWER: We have no information on the existing flooring. We believe it was a cementitious coated flooring with an integral insecticide, but that was never confirmed.

6. Specification Section 09 67 23.13 refers to walnut shell aggregate (Paragraph 1.5.1 and 3.2.2). Not familiar with this aggregate. Please identify manufacturer used as basis of design.

ANSWER: Stonhard was the BOD.

7. Spec section 23 01 30.41, HVAC System Cleaning, is included but there is no scope of cleaning included. What is scope for HVAC System Cleaning.

ANSWER: Clean new fresh air system in accordance with spec section and manufacturers guidelines. Clean ductwork attached to fresh air unit to maximum of 70 feet. Clean roof top exhausts IAW spec section. For all AHU’s Visually inspect the HVAC system to ensure that no visible contaminants are present. If present clean IAW spec section to a maximum of 30 feet.

8. Plan Note 4 on the USCG ATC UPH/Galley HVAC Project Drawing S258536443M131, Discipline Sheet No M131 Rev 1 is not clear.

ANSWER: Delete note 4 Sheet M131

9. Note 4 says ”Please kitchen hood makeup air supply with 5 ton condition air supply system. Reposition and replace existing exhaust fan.”

ANSWER: Delete note 4 Sheet M131 replace with note 1 and 2

10. confirm if a new 5 ton cooling system is to be provided. Please confirm if cooling system is standalone DX system or Water Source Heat Pump System.

ANSWER: Delete note 4 Sheet M131 replace with note 1 and 2. Keep existing units

11. HVAC Unit DOAS-1 is to be replaced as per drawing S258536443M402, Discipline Sheet No M402 Rev 1 and schedule on drawing S258536443M601, Discipline Sheet No M601 Rev 1. We have not been able to find a unit which will meet this requirement.

ANSWER: Custom manufactured unit

12. Please provide manufacturer and model of the unit which is the basis of design.

ANSWER: There are no basis of design. Existing unit is a custom manufactured Unit

13. Spec section 23 01 30.41, HVAC System Cleaning, is included but there is no scope of cleaning included. What is scope for HVAC System Cleaning.

ANSWER: Clean new fresh air system in accordance with spec section and manufacturers guidelines. Clean ductwork attached to fresh air unit to maximum of 70 feet. Clean roof top exhausts IAW spec section. For all AHU’s visually inspect the HVAC system to ensure that no visible contaminants are present. If present clean IAW spec section to a maximum of 30 feet.

14. Plan Note 4 on the USCG ATC UPH/Galley HVAC Project Drawing S258536443M131, Discipline Sheet No M131 Rev 1 is not clear. Note 4 says ”Please kitchen hood makeup air supply with 5 ton condition air supply system. Reposition and replace existing exhaust fan.” Please confirm if a new 5 ton cooling system is to be provided. Please confirm if cooling system is standalone DX system or Water Source Heat Pump System.

ANSWER: Delete note 4 Sheet M131 replace with note 1 and 2

15. HVAC Unit DOAS-1 is to be replaced as per drawing S258536443M402, Discipline Sheet No M402 Rev 1 and schedule on drawing S258536443M601, Discipline Sheet No M601 Rev 1. We have not been able to find a unit which will meet this requirement. Can you please provide manufacturer and model of the unit which is the basis of design.

16. ANSWER: There are no basis of design. Existing unit is a custom manufactured Unit

17. Plan Note 4 on the attached USCG ATC UPH/Galley HVAC Project Drawing S258536443M131 Rev 1 is not clear. Note 4 says ”Please kitchen hood makeup air supply with 5 ton condition air supply system. Reposition and replace existing exhaust fan.” Please confirm if a new 5 ton cooling system is to be provided. Please confirm if cooling system is standalone DX system or Water Source Heat Pump System. Thank you.

ANSWER: Delete note 4 Sheet M131 replace with note 1 and 2

18. Is duct cleaning throughout the building a requirement of this contract?

ANSWER: Not throughout, but as defined below: Clean new fresh air system in accordance with spec section and manufacturers guidelines. Clean ductwork attached to fresh air unit to maximum of 70 feet. Clean roof top exhausts IAW spec section. For all AHU’s visually inspect the HVAC system to ensure that no visible contaminants are present. If present clean IAW spec section to a maximum of 30 feet.

19. During the epoxy flooring work how long will the Galley be allowed not to be in use?

ANSWER: 14 Days

20. The existing kitchen and office equipment where the Epoxy flooring is to be installed will have to be removed and reinstalled. The sheet notes do not address who will remove it, store it and reinstall it.

ANSWER: Contractor will remove and reinstall the kitchen equipment. See attached drawing of existing equipment to removed then reinstalled. The equipment can temporarily be stored on base within a secured government facility. The facility will be within 1 mile from project site.

21. Will there be thermal shock in the area? If so, the spec’d epoxy system will not be warrantied for thermal shock. If a warranty to include thermal shock is required, a Urethane system will be required. See attached product information.

ANSWER: Yes, there will be thermal shock in select areas. Bid the spec's and provide standard manufactures warranty, this includes warranty wording, showing exemptions.