6. The demo drawings show the existing chw pipe as well as steam pipe staying and not demoing. When you look at the renovation drawings the same piping is there but only in light lined not bold. This piping is confusing the vendors and their thinking this is what the engineer wants to do with the coils. I Believe specs states they want coil pull without having to remove the headers and walls to remove. Please advise. A: Note 11 on the demo drawings (for both office and lab units) shows to demolish all piping as required to provide the piping diagrams per the detail sheet M900. This is correct. The pipe will need to be moved and relocated based on the submitted unit and the exact location in the AHUs that the pipes need to line-up. The office units may be piped from the outside as they are now, but the lab units will be piped in the center. The unit specification calls form internally demountable coils, meaning all coils shall be able to be disconnected from inside of the unit and moved out the access doors. Since the office units only have filters in the return/OA economizer on the far section of the unit, there is nothing that cannot be moved through the unit to the area with coil pull. The doors must be free of obstruction, but there is no piping that is required where the new access doors shall be. END OF ADDENDUM 3
6. The demo drawings show the existing chw pipe as well as steam pipe staying and not demoing. When you look at the renovation drawings the same piping is there but only in light lined not bold. This piping is confusing the vendors and their thinking this is what the engineer wants to do with the coils. I Believe specs states they want coil pull without having to remove the headers and walls to remove. Please advise. A: Note 11 on the demo drawings (for both office and lab units) shows to demolish all piping as required to provide the piping diagrams per the detail sheet M900. This is correct. The pipe will need to be moved and relocated based on the submitted unit and the exact location in the AHUs that the pipes need to line-up. The office units may be piped from the outside as they are now, but the lab units will be piped in the center. The unit specification calls form internally demountable coils, meaning all coils shall be able to be disconnected from inside of the unit and moved out the access doors. Since the office units only have filters in the return/OA economizer on the far section of the unit, there is nothing that cannot be moved through the unit to the area with coil pull. The doors must be free of obstruction, but there is no piping that is required where the new access doors shall be. END OF ADDENDUM 3
RFP%20744-R1816_Addendum%203_Questions.docx