ESBD_497193_1776474217370_717-26-735 Addendum 5 Q A REVISED.pdf
PDF 150 KB Posted
- Attached to
- Hot Water/Steam Boiler Remove/Replace
- Solicitation number
- 717-26-735
- Issued by
- Harris County, Texas
About this file
This is an Addendum 5 Questions & Answers document for Texas Southern University's Procurement Services related to ITB #717-26-735 for hot water and steam boiler removal and replacement. The project involves the disconnection, demolition, and removal of existing Sellers Model boilers (two 300 BHP hot water boilers and one 125HP steam boiler) located at the Satellite Plant and New Science Center Building, followed by installation of three replacement Sellers brand boilers with associated piping, flue vents, gas systems, electrical components, and a new 3-way mixing valve. Key clarifications from this addendum address operational constraints and technical specifications: temporary hot water or steam is not required during construction; crane work, offloading, and staging may occur during school hours; existing flue vent stacks will not be removed but require support until new boilers are installed; all three stacks will be reused; the existing boilers must be removed from the premises; BAS wiring exists for control and monitoring of units and should be reconnected as required for the new installation; and the 3-way mixing valve is specified as an 8" 150# valve with a Bray Controller (NYL#-3080 Series 70-0200-113C3-536/A) operating at 24 volts with a 60-second turn time. The University anticipates replacement with OEM equipment to minimize piping modifications, and the scope of work listed is not all-inclusive.
This addendum addresses technical and logistical questions submitted by prospective bidders and requires acknowledgment through signature from all respondents. The document does not establish pricing terms, set-asides, or funding sources but serves as clarification to the original scope of work. Bidders must incorporate this addendum into their formal responses and demonstrate understanding of the refined project requirements, including the specific technical specifications for the replacement 3-way mixing valve and the requirement to maintain existing flue venting infrastructure during the transition. The mandatory walkthrough was scheduled for March 30, 2026, and the bid deadline was April 2, 2026, at 11:00 a.m. Central Time.
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Procurement Services - Purchasing
Addendum 5
Questions & Answers
ITB # 717-26-735
Hot Water/Steam Boiler Removal and Replacement
• Does any temporary HW or steam need to be provided during construction phase?
Answer: No
• Can crane work be performed during school hours?
Answer: Yes
• Can offloading and staging be performed during school hours?
Answer: Yes
• Is there a TSU project manual that will supersede the scope of work
Answer: No
Work scope listed is not all inclusive:
• Disconnect Electrical
Please indicate if there is any BAS wiring.
If so, What function does this wiring serve.
Answer: There is BAS wiring. Wiring is for control and monitoring of units.
• Demo Necessary Interconnecting Piping
Answer: Yes, as required. Replace per new installation.
• Demo the existing Flue Vents
Confirm that ALL (3) stacks are NOT to be removed.
Answer: Flue vents are not removed. Will need support until new boiler is installed.
• Demo the Existing Sellers Boilers
Confirm contractor is to remove from premises.
Answer: Yes
• Clean and Prep Area for the New Equipment
• Set the (3) New Sellers Boiler in Place
• Install the (3) New Flue Vents to Existing Penetration
Confirm that ALL (3) stacks are NOT to be removed.
Answer: Flue piping is to be reused. See answer above.
• Install Insulation and Metal Jacketing on New Flue Vents
See Above
Answer: Repair insulation as required.
• Install Supply and Return Piping to New Boilers from Header
• Insulation to Insulation to New Supply and return Piping
• Install Gas Piping to Existing Gas Connections
• Install Relief Valve and Drain Piping
• Fill System and Check for Leaks
• Reconnect Electrical to Boilers
Indicate if any additional wiring is required
Answer: As required for new install.
• Replace 3-way mixing valve on Hot Water Line
Confirm size of 3-Way Valve.
Please provide actuator information.
Drive signal & power if required
Answer: 8” 150# 3-Way Valve with Bray Controller:
· NYL#-3080
· Series 70-0200-113C3-536/A
· Type (IP): 4, 4X
· Torque: 2000 in. lbs.
· Speed: 60 sec ¼ turn
· F. L. C. /Max: 2.0
· Voltage: 24
· Frequency: 50/60 Hertz
· Duty: Continuous
• Startup Boiler to Manufacturers Specifications
• Will the University accept scotch marine boilers for the two (2) 300 BHP boilers?
Answer: Anticipate replacement with OEM to minimize piping modifications.
*Please sign this Addendum and include it in your response. Your signature will signify your acknowledgement / receipt of this addendum.
Signature
File details come from the government source that posted it. Updated .