RFB 23-BM09 - Questions Answers.pdf
PDF 6 MB Posted
- Attached to
- City Hall Heat Pump Replacement
- Solicitation number
- 23-BM09
- Issued by
- Dane County, Wisconsin
About this file
This document is a Questions and Answers file for RFB #23-BM09 issued by the City of Sun Prairie, Wisconsin for the replacement of heat pumps at City Hall. The City seeks bids for replacing 21 water source heat pumps throughout the facility with Carrier 50PCH or equivalent units featuring MERV 13 filtration, electronically commutated motors, and compatibility with the new Tridium Niagara Automation System controls. The project encompasses heat pump replacement on three floors (basement, first floor, and second floor) of City Hall, along with replacement of diffusers, grilles, and ductwork cleaning under alternate bid options. Installation of 2 CRAC units in the computer room for redundancy is also included. The City has established a deadline of November 1, 2023 for new units to be operational to prevent service disruptions during the heating season, with some flexibility allowed for equipment lead times. Limited staging space is available on the second floor, and an elevator is accessible for use across all three floors. The questions and answers document provides clarification on control system specifications, electrical requirements, equipment locations, and installer responsibilities.
The awarded contractor will be responsible for integrating all replacement units into the new BAS system, completing all electrical and installation work, moving and protecting furniture and equipment in work areas, and ensuring proper coordination with building maintenance and IT departments. The existing HVAC system operates on water loops at 140°F for the primary boiler and 80°F for the heat pump loop, with the new system including a 1,000,000 BTU Ajax boiler. The project involves replacing units of varying capacities ranging from 1.5 to 6 tons across the three floors and includes alternate bids for diffuser replacement, duct cleaning, spray foam insulation (Class 1 fire-rated closed cell with R6+ value) on the second floor perimeter, and computer room CRAC unit specifications. No specific pricing, set-asides, or incumbent information is provided in the questions and answers document.
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Other files
| File | Type | Posted |
|---|---|---|
| City Hall - HPU Replacements.PDF | ||
| Draft Contract.PDF | ||
| 23-BM09_Notice of Intent to Award Letter.pdf | ||
| 23-BM09 Bid Opening Log.pdf | ||
| RFB 23-BM09.pdf | ||
| Attachment 1.PDF |
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Text version
City of Sun Prairie RFB #23-BM09 – City Hall Heat Pump Replacement Questions Received by June 6, 2023
1. What controls are in the building and if they are proprietary to a particular contractor?
Current HVAC control system: Honeywell WEBS Ax by Control Works New: Tridium Niagara Automation System by Helm (Project start - summer 2023)
2. Question concerning JCI?
No JCI equipment at City Hall.
3. Who is responsible for integration to control system?
Awarded party is responsible for re-integration of new units into HVAC control system.
4. Regarding the Liebert Unit replacement: will the awarded party have to integrate both Liebert units into the new BAS system? Is the new electrical for the second unit being added to be included or is that by others?
Yes, the awarded party will be responsible for integrating the new CRAC units into the BAS system. All electrical and installation requirements to be fulfilled by awarded party.
5. What is the design loop temperature? What type of fluid?
Water only system.
Primary boiler loop setpoint - 140* Heat pump loop setpoint – 80*
6. Does controls have BACnet in the system?
Yes
7. Is there a preference for diffuser replacements?
2x2 drop in diffusers preferred over current cut-in style.
8. Shift unit or change orientation?
Either option to allow for better access of filters, belts, fan motors, and servicing on units 1-6, 1-9, 2-3, 2-6, 2-8.
9. Will shelving need to be moved in the police station?
Building maintenance techs will work with contractor to move any shelving units blocking access to units.
10. What is the anticipated installation date?
No set start date. However, new units should be in place prior to November 1, 2023 to prevent service disruptions during heating season. Some discretion will be given based on lead times of equipment.
11. How many units needed in the IT/computer room?
Replace with 2 units for redundancy purposes.
12. Will workstations/computer areas need to be covered during installation?
Yes, cover and clean up of work areas is the responsibility of the installer.
13. What are the specs on the units – model/serial #? See Pages 3-4
14. Is there a staging area? Is there an elevator available for use?
There is limited staging area on the 2nd floor if needed and the elevator is available for use to access all three floors.
15. Do you require the same condenser style unit?
No
16. Alternate Bid #2 –
a. Diffuser locations and quantity. Please see drawings attached. Quantity 140
b. Please provide specs and count of grilles for replacement. See pages 5-8
c. Please provide scope for duct cleaning. Size/length, locations, plans? See 5-8
d. Are there any other ‘miscellaneous improvements’ to be including in this alternate? No
17. Alternate Bid #3 -
a. Please provide specification for spray foam. Class 1 fire-rated closed cell spray foam >R6 value
b. Please provide drawing with perimeter needed spray foam since there are areas of the 2nd floor where heat pumps are not replaced. Entire 2nd floor perimeter.
18. Alternate Bid #4 -
a. Please provide model and serial numbers for computer room unit and outdoor condensing unit.
See page 4.
19. Please provide manufacturer information for new control system.
New control software is a Tridium Niagara system with graphics and installation by Helm Mechanical.
Currently scheduled to be completed prior to this project.
20. Are the new heat pumps to be connected to the new control system? Who is responsible for that control’s connection?
Yes, heat pump installer responsible for reintegration of units back into control system.
21. Are existing control valves being reused?
Control valves will be replaced under the controls update project and will be reused.
22. Have the new electrical requirements been confirmed to match existing circuits?
Electrical requirements have been confirmed by JDR Engineering
23. Do you have pictures and locations of electrical panels?
Please see page 11-16. Photos can be provided of specific panels in question.
24. Who is responsible for moving and protecting furniture etc. in work areas?
Installer is responsible for protecting and moving furniture. Building Maintenance and IT departments will be on hand to assist in any areas that are a concern.
Name Location Category Description Make Model Serial #
CH HPU L-1
CH - Basement - Police
Heat Pump
1.5 Ton Water Source Heat
Pump Carrier 50QXH018 3992Z38857
CH HPU L-2
CH - Basement - Police
Heat Pump 2 Ton Water Source Heat Pump Carrier 50QXH024 4192Z39496
CH HPU L-3
CH - Basement - Police
Heat Pump
1.5 Ton Water Source Heat
Pump Carrier 50QXH018 3992Z38856
CH HPU L-4
CH - Basement - Police
Heat Pump 3 Ton Water Source Heat Pump Carrier 50QXH036 3992Z38871
CH HPU L-5
CH - Basement - Police
Heat Pump
1.5 Ton Water Source Heat
Pump Carrier 50QXH018 3492Z37417
CH HPU L-6
CH - Basement - Police
Heat Pump 2 Ton Water Source Heat Pump Carrier 50QXH024 4092Z39161
CH HPU L-7 CH - Basement Heat Pump Water Source Heat Pump Daikin E028929000200
CH HPU L-9
CH - Basement - Police
Heat Pump 3 Ton Water Source Heat Pump Carrier 50RHR036ECC41110 1203V13286
CH HPU L-10
CH - Basement - Police
Heat Pump
1.5 Ton Water Source Heat
Pump Carrier 50RHR024BCC41110 1203V13415
CH HPU L-11 CH - Basement Heat Pump Water Source Heat Pump Daikin E028929000100
CH HPU 1-1 CH - 1FL - Admin Heat Pump 3 Ton Water Source Heat Pump Carrier 50PCH036BCC4ACA1 2918V83309
CH HPU 1-2 CH - 1FL - Admin Heat Pump Water Source Heat Pump Carrier 50PCH070BCC6ECA1 4519V12865
CH HPU 1-3 CH - 1FL - Admin Heat Pump 4 Ton Water Source Heat Pump Carrier 50QXH048 3892Z38718
CH HPU 1-4 CH - 1FL - Admin Heat Pump
3.5 Ton Water Source Heat
Pump Carrier 50QXH042 3992Z38886
CH HPU 1-5 CH - 1FL - Police Heat Pump 2 Ton Water Source Heat Pump Carrier 50RHC024ZCC40130 4602V30186
CH HPU 1-6 CH - 1FL - Police Heat Pump
3.5 Ton Water Source Heat
Pump Carrier 50QXH042 3992Z38883
Highlighted units not on replacement schedule
CH HPU 1-7 CH - 1FL - Police Heat Pump 2 Ton Water Source Heat Pump Carrier 50QXH024 4092Z39160
CH HPU 1-8 CH - 1FL - Police Heat Pump
2.5 Ton Water Source Heat
Pump Carrier 50PCH036BCC4ECC1 2922V59107
CH HPU 1-9 CH - 1FL - Police Heat Pump
2.5 Ton Water Source Heat
Pump Carrier 50QXH030 4092Z39129
CH HPU 1-10 CH - 1FL - Police Heat Pump
2.5 Ton Water Source Heat
Pump Carrier 50PCH036BCC4ECC1 2922V59104
CH HPU 2-1 CH - 2nd Floor Heat Pump 3 Ton Water Source Heat Pump Carrier 50PCH036BCC4ACC1 1516V35819
CH HPU 2-2 CH - 2nd Floor Heat Pump 6 Ton Water Source Heat Pump Carrier 50PCH070BCC6ECC1 3822V62574
CH HPU 2-3 CH - 2nd Floor Heat Pump 2 Ton Water Source Heat Pump Carrier 50QXH024 4092Z39162
CH HPU 2-4 CH - 2nd Floor Heat Pump
3.5 Ton Water Source Heat
Pump Carrier 50QXH042 3992Z38884
CH HPU 2-5 CH - 2nd Floor Heat Pump
2.5 Ton Water Source Heat
Pump Carrier 50PCH030ZCC4ECC1 1019V96669
CH HPU 2-6 CH - 2nd Floor Heat Pump 5 Ton Water Source Heat Pump Carrier 50QXH060 3892Z38566
CH HPU 2-7 CH - 2nd Floor Heat Pump
2.5 Ton Water Source Heat
Pump Carrier 50QXH030 4092Z39132
CH HPU 2-8 CH - 2nd Floor Heat Pump 5 Ton Water Source Heat Pump Carrier 50QXH060 3892Z38567
CH HPU 2-9 CH - 2nd Floor Heat Pump Water Source Heat Pump Climatemaster GCH042BFC30CRSS M13824585
CH HPU 2-10 CH - 2nd Floor Heat Pump
3.5 Ton Water Source Heat
Pump Carrier 50QXH042 3992Z38887
CH Boiler CH - Basement Boiler 1,000,000 BTU Boiler AJAX Boiler Inc. WGB-2000 V557314
CH Liebert 2 CH - 2nd Floor CRAC Computer Room Air conditioner BU06E-CAE1 724635-001
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