Questions and Responses - 5 pages.pdf
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- Solicitation number
- 36C26326Q0456
About this file
This document is a Responses to Questions file for federal contract opportunity PN: 636-26-306, which concerns the replacement of HVAC systems in Buildings 6 and 8 at a VA facility.
The project requires replacement of air handling units (AHUs) and associated equipment in two buildings. Building 6 will have a McQuay CAH010FMAC AHU (5,000 CFM) installed, along with a new 3-ton mini-split system in the basement for mechanical space cooling only. Building 8 will receive a McQuay CAH006FMAC AHU (3,200 CFM). Both buildings will have DX cooling coils and steam heating coils replaced or installed. The condenser units are McQuay models ACZ020A for Building 6 (196 MBH capacity, R22 refrigerant) and ACZ013A for Building 8 (127.7 MBH capacity, R22 refrigerant). Bidders may propose alternative refrigerants (R454B or R410A) if equipment is compatible with SOW specifications and meets EPA guidelines. Building 6 work requires after-hours scheduling for interior work affecting patient areas, while Building 8 office work can occur during business hours. PCRA and ICRA protocols will be completed before work begins. Crane operations are permitted with 14 days' notice and a lift plan; lifts over Building 6 must occur after hours. No liquidated damages, no retainage requirement, and no temporary HVAC supply is required during replacements. The new 3-ton mini-split does not require building automation system integration. VA submittal response time is 15 business days. Controls Services Inc. is the controls contractor; existing Schneider Electric controls will remain in place with no BMS controller upgrades required. Line set routing, mini-split location, and condenser placement require coordination with the Contracting Officer Representative (COR). All solicitation documents and amendments are available at SAM.gov.
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Responses to Questions PN: 636-26-306 Replace HVAC System in Building 6 & 8
Q: I wanted to verify that there are no liquidated damages for this project, correct?
A: No, FAR 52.211-12 Liquidated Damages – Construction is not included in the General Conditions.
Q: Can you share the plans and specifications so I can put together a quote?
A: There are no plans or specifications. Bids should be done based on the SOW.
Q: Will these works interrupt any patient procedures?
A: Per the SOW Building 6 will require work to be performed after hours, if work is performed inside the building. However if work is done outside or in the mechanical rooms it can be done during business hours. For Building 8, office occupancy, work can be performed during the day.
PCRA and ICRA will be completed before work begins.
Q: In the scope of work, one new 3-ton mini-split is being added in the basement of Building 6.
The last paragraph on page 3 of the scope of work notes, “Verify that the building automation system interfaces correctly and is tied into the newly installed equipment for remote view and control of the associated components in this scope.” Does this mean the verification and continuation of the existing Schneider Electric EcoStruxure infrastructure for the units being installed? Will the new 3-ton mini-split being added in the basement of Building 6 come with a manufacturer installed BACnet communication card? If so, is the BACnet card IP or MSTP communication?
A: The Mini Split is to be used to provide cooling to the Mechanical space. It will not need to be added to the building automation system.
Q: How is the AHU in building 8 supposed to be removed/replaced? Are we opening up the exterior wall, or will it go through the outdoor air louvre? Louvre seems to be oversized for this reason. Please advise if the new AHU will go through the same OA louvre.
A: Yes the idea is to use the existing outdoor air louvre.
Q: Can you provide information on the DX coil in the AHU for building 6? Fins per inch, length, width and height, connection sizes and line set sizes for the new coil? These can be purchased direct from the coil company with this information.
A: See below. Taken from drawings dated 02-25-2002.
MARK SERVES
TOTAL
CAPACITY
(MBH)
REFRIGERANT
TYPE
FAN
NO
FAN
HP
NO
CKT
AMB
TEMP F
V PH MCA
ACC-1 BLDG 6 196 R22 2 1 1 105 208 3 79 1, 2, 3
ACC-2 BLDG 8 127.7 R22 2 1 1 105 460 3 26 1, 2, 3
McQUAY ACZ020A McQUAY ACZ013A
MECHANICAL NOTES:
1. SCROLL TYPE COMPRESSOR
2. PROVIDE HOT-GAS BY-PASS
3. CONTRACTOR TO SIZE REFRIGERANT LINES AS PER INDUSTRY STANDARD AND MANUFACTURES RECOMMENDATIONS
CONDENSER DATA ELECTRICAL DATA
BASIS OF DESIGN
MECH
NOTES
AIR COOLED CONDENSER
Q: Will the new line set be the same size and fit in the existing core holes running down into a crawl space in building 6?
A: Size should be the same if they meet manufactures recommendations. See question 7.
Q: Is there an option to relocate line sets out through the soffit on building 6?
A: If new route is desired, coordinate with the COR prior to work. Any existing holes in the building not being reused by new line sets shall be filled in to maintain building envelope integrity.
Q: Is the bid bond 20%?
A: See FAR 52.228-1(c) for bond amounts.
Q: Who is the controls contractor?
A: Controls Services Inc.
Q: How quick is the submittal turnaround? Equipment lead times are a major concern.
A: Please allow 15 business days for VA response.
Q: Building 6 removal of the DX coil. There does not seem to be enough pull space allowed to remove and replace the AHU DX coil. Can you provide a sequence of assembly for this unit?
Does it need to be disassembled completely and reassembled so the coil section can be accessed?
A: Means and methods need to be determined by the contractor. But the VA believes this would be the best course of action.
SPL
MARK LOCATION
WHEEL
TYPE
WHEEL
DIA (IN)
BLADE
TYPE
MIN OA
CFM
TOTAL
CFM
TSP/
ESP
HP EFFICIENCY V PH
AT
250 HZ
AHU-1 BLDG 6 CENT 15 FC 640 5,000 3.5/1.5 7.5 - 208 3 85 CC-1 HC-1 2" TA 1
AHU-2 BLDG 8 CENT 10.6 FC 620 3,200 3.7/1.5 5 - 460 3 80 CC-2 HC-1 2" TA 1
McQUAY CAH010FMAC
NG
COIL
MARK
NG
COIL
MARK
FILTER
*SOUND POWER LEVEL, REFERENCE 10-12 WATTTS
1. UNIT CONFIGURATION - MULTIZONE
McQUAY CAH006FMAC
MECHANICAL NOTES:
AIR HANDLING UNIT (FACTORY BUILT)
ELECTRICAL DATA
BASIS OF DESIGN
MECH
NOTES
DB WB DB WB
CC-1 AHU-1 5,000 1.14 81.6 68 54.1 53.8 504 R22 218.3 144.6 1
CC-2 AHU-2 3,200 1.37 82 68 54.1 53.8 542 R22 139.2 92.6 1
NET
TOT (MBH)
McQUAY 5EJ0906C McQUAY 5EJ1006C
MECHANICAL NOTES:
1. SUCTION TEMPERATURE = 45F
EAT (F) LAT (F) FACE
VELOCITY (FT/MIN)
MARK SERVES
COIL - DX
REFR
TYPE
NET
TOT (MBH)
BASIS OF DESIGN
MECH
NOTES
CFM
PD
(IN WG)
HC-1 BLDG 6 5,000 0.5 215 60.8 101.7 5 186 1
HC-2 BLDG 8 3,200 0.56 136 57.6 98 5 117 1
PRESS
PSIG
1. PROVIDE STEAM TRAP SIMILA.R TO EXISTING. VERIFY WITH VA FACILITIES ENGINEER PRIOR TO INSTALLATION
LBS/HR BASIS OF DESIGN MECH
NOTES
McQUAY 5VA0901C McQUAY 5VA0901C
MECHANICAL NOTES:
STEAM COIL
MARK SERVES CFM MAX AIR /
PD (IN WG)
SENS
(MBH)
EAT (F)
DB
LAT (F)
DB
DB WB
H-1 AHU-1 5,000 60X24 70 65 6" 90 15 32.3 MOD. ELECT.
H-2 AHU-2 3,200 50X23 70 65 6" 90 15 20.7 MOD. ELECT.
CONTROL
TYPE
CAP
(LBS/HR)
BASIS OF DESIGN
MECH
NOTES
DRI-STEEM 1-DS-5-60
DRI-STEEM 1-DS-5-60
MECHANICAL NOTES:
HUMIDIFIER - STEAM
MARK SERVES CFM
DUCT
SIZE
ROOM DESIGN
CONDITIONS
MAXIMUM
ABSORPTION
DISTANCE
DUCT
AIR
TEMP
STM
PRESS
Q: Will any of the electrical circuits require upgrades with the new units?
A: Units to be specified are to match existing electrical.
Q: Is the 3 ton mini split a new install or does it replace existing?
A: SOW states New not replacement. Unit is to provide cooling only for the space.
Q: Is there a housekeeping pad requirement for the new condensing units? Will the new condenser at building 8 fit on the existing pad?
A: New unit should be specified to fit on existing pad.
Q: Is a secondary drain pan required under each AHU? What is the material schedule for the secondary drain pans? Do these rooms have floor drains?
A: No, a secondary drain pan is not required, unless required by the manufacturer. There are no floor drains, both buildings are hard-piped to their respective existing sanitary lines.
Q: Can the crane set up in front or on the south side parking lot of the VA Dental clinic building 6?
A: Yes a crane can be used but road access, ER access, shall not be blocked off, at least one lane should be passable. A crane lift plan, 14 days notice, will be required before lift can take place. If lift is over the building it would have to take place after hours.
Q: Can the crane set up in the parking lot of building 8?
A: Yes a crane can be used. A crane lift plan, 14 days notice, will be required before lift can take place
Q: Does all work associated with this BLDG (6) need to be done after hours, or only inside work that affects patients?
A: No entry into patient areas of building 6 will be allowed during business hours.
Q: Does the contractor need to supply temp HVAC while the unit is replaced, building 6?
A: No.
Q: Is it acceptable to run the new DX refrigerant piping using a different route than the existing and come through near the mech room exterior door, building 6?
A: If new route is desired, coordinate with the COR prior to work. Any existing holes in the building not being reused by new line sets shall be filled in to maintain building envelope integrity.
Q: Can the new mini split condenser be set anywhere outside among the other condensers as long as there is adequate service clearance provided, building 6?
A: Yes, coordinate with COR on final location.
Q: Does the contractor need to supply temp HVAC while the unit is replaced, building 8?
A: No.
Q: What brand of controls are presently connected to equipment?
A: Schneider Electric
Q: What is the present control contractor?
A: Control Services Inc.
Q: Will the Crane pick for both condensing units done during normal business hours?
A: Yes a crane can be used during normal business hours given that no one is under the load and road access, ER access outside building 6 is unrestricted, at least one lane should be passable. A crane lift plan, 14 days notice, will be required before the lift can take place.
Q: Location of mini split indoor section?
A: TBD by contractor, coordinate with COR
Q: Location of outdoor condensing unit?
A: TBD by contractor, coordinate with COR
Q: Will the outdoor unit be mounted on wall bracket or a pad?
A: TBD by contractor, coordinate with COR
Q: What is the distance apart from the outdoor unit to the indoor section?
A: TBD by contractor, should meet manufacturer's specifications, coordinate with COR
Q: Will the line set pass through any walls, roof, floor, or ceiling?
A: TBD by contractor, coordinate with COR, building envelop integrity shall be maintained.
Q: Will the condensate from the mini split indoor section be gravity or pumped condensate?
A: TBD by contractor and equipment specified.
Q: Is there more than 1 zone actuator that needs replaced and if so, how many?
A: Zone actuators should not be touched. Remove “install new steam actuator, install new zone actuator” from building 8 SOW. There should also be no need to modify steam piping.
Q: What make does the new steam actuator need to be to be compatible to the existing steam valve?
A: See question 32 M&O
Q: There is a lot of room open for interpretation on the 3-ton mini split system. Does this need to be low ambient, and what are the temps? -13 is about the lowest I think with mini splits.
A: No low ambient required. The mini split is to provide cooling only.
Q: Does the VA want the BMS Controllers in both mechanical rooms in Building 6 & 8 upgraded?
A: No, current BMS controllers and actuators are operating.
Q: Is there any other option for refrigerant allowed besides R410-A? If 410A equipment is available.
A: Bidder is welcome to provide a bid using R454B or R410A as long as the specified equipment is compatible and similar to the equipment stated in the SOW, necessary safety protocols are installed and permitted by current EPA guidelines. Bid shall also include the services, section C, as listed in the SOW.
Q: Please provide a copy of the sign-in sheet from today’s organized site visit A: Site Visit Sign In Sheet is attached to this amendment.
Q: I wanted to verify that there are no liquidated damages for this project, correct?
A: No, FAR 52.211-12 Liquidated Damages – Construction is not included in the General Conditions section of the solicitation.
Q: Is there a retainage for this project? Will you provide the necessary tax exemption forms for this project?
A: Retainage is not included; however, the Contracting Officer may retain funds in accordance with VAAR 852.232-70 Payments Under Fixed-Price Construction Contracts (Without NAS-CPM) if any of the conditions exists.
Q: Please advise if anyone from your group can send all parties a copy of the attendees from yesterday’s meeting?
A: Site Visit Sign In Sheet is attached to this amendment.
Q: If you could also provide information on how to access any addendums for this project would be appreciated.
A: Amendments and all other solicitation documents can be found at SAM.gov https://sam.gov/workspace/contract/opp/bd899a5c9d1a4bc88be28fbdd7fb9164/view https://sam.gov/workspace/contract/opp/bd899a5c9d1a4bc88be28fbdd7fb9164/view
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