Addendum 1 - ABSD - BAS DDC RFP.pdf

Anchor Bay School District – Energy Savings Performance Contract

BAS/DDC Controls Upgrades - Request for Proposal – Addendum No. 1

Centrix Energy 792 Lois Dr Sun Prairie, WI 53590

(817) 506-8303

July 28, 2026

TABLE OF CONTENTS

ADDENDUM NO. 1

OVERVIEW

MODIFICATIONS AND CLARIFICATIONS

ATTACHMENTS

Exhibit D. Sequence of Operations – Vertical Unit Ventilators – dated 7/28/2026

ADDENDUM NO. 1

Project: Anchor Bay School District – Energy Savings Performance Contract

BAS/DDC Controls Upgrades – Addendum 1

TO: All Prospective Bidders/Contractors

DATE: July 28, 2026

RE: Addendum No. 1 – Clarifications and Modifications

OVERVIEW

This Addendum No. 1 is incorporated into the original Bidding Documents dated July 17, 2026, for the above-referenced project. The purpose of this addendum is to clarify, revise, and/or supplement the bidding documents as noted below. As stated in the original RFP, bids are to be received at the district’s Administrative Office, no later than 1:00PM (local time) on July 31, 2026.

All bidders shall acknowledge receipt of this Addendum No. 1 in the space provided on the Bid Form. Failure to acknowledge receipt of this addendum may result in rejection of the bid.

Where any item in this addendum conflicts with the original Request for Proposal (RFP) bidding documents, the requirements of this addendum shall govern and take precedence.

MODIFICATIONS AND CLARIFICATIONS

1. Scope clarification for control devices to be added, as originally described in Exhibit C (Sequence of Operations)

a. VAV Air Handling Units:

i. Return Air Humidity Sensor

1. Provide ADD ALTERNATE price - this will be for alarming only, not for control of unit

ii. CO2 (return air)

1. Required where the AHU’s have outside air and mixed air damper actuators – to be added in Base Bid

iii. C02 (outside air)

1. Sensor required for each school, not for each unit – to be added in Base Bid

iv. Filter air pressure drop

1. Provide ADD ALTERNATE price - this will be for alarming only, not for control of unit

b. Single Zone Constant Volume Air Handling Units:

i. Outdoor Airflow Measurement

1. Required where the AHU’s have outside air and mixed air damper actuators – to be added in Base Bid

ii. Return Air Humidity Sensor

1. Provide ADD ALTERNATE price - this will be for alarming only, not for control of unit

iii. CO2 (return air)

1. Required where the AHU’s have outside air and mixed air damper actuators – to be added in Base Bid

iv. C02 (outside air)

1. Sensor required for each school, not for each unit – to be added in Base Bid

v. Filter air pressure drop

1. Provide ADD ALTERNATE price - this will be for alarming only, not for control of unit

vi. Room temperature sensor if zone tempering coils are used

1. Yes, required sensor - to be added in Base Bid

c. Constant Volume Roof Mounted Units:

i. Outdoor Airflow Measurement

1. Required where the AHU’s have outside air and mixed air damper actuators – to be added in Base Bid

ii. Return Air Humidity Sensor

1. Provide ADD ALTERNATE price - this will be for alarming only, not for control of unit

iii. CO2 (return air)

1. Required where the AHU’s have outside air and mixed air damper actuators – to be added in Base Bid

iv. C02 (outside air)

1. Sensor required for each school, not for each unit – to be added in Base Bid

v. Filter air pressure drop

1. Provide ADD ALTERNATE price - this will be for alarming only, not for control of unit

d. Fan Coil Units: (these devices originally operated under factory controls)

i. Full fan speed modulation

1. Replace existing functionality – to be added in Base Bid

ii. Return Air Humidity sensor

1. Provide ADD ALTERNATE - this will be for alarming only, not for control of unit)

iii. Discharge air temperature

1. Provide ADD ALTERNATE price - this will be for alarming only, not for control of unit

iv. Condensate overflow switch

1. Yes, required sensor - to be added in Base Bid

v. Fan motor status

1. Yes, required sensor - to be added in Base Bid

vi. Filter air pressure drop

1. Provide ADD ALTERNATE price - this will be for alarming only, not for control of unit

vii. Freeze protection

1. Yes, required sensor – to be added in Base Bid

e. Single Zone Blower Coil Units:

i. Room sensor

1. Yes, required sensor – to be added in Base Bid

ii. RA Humidity sensor

1. Provide ADD ALTERNATE - this will be for alarming only, not for control of unit

iii. Filter air pressure drop sensor

1. Provide ADD ALTERNATE - this will be for alarming only, not for control of unit

f. Zone Duct Booster Coil:

i. Discharge air temp sensor

1. Provide ADD ALTERNATE - this will be for alarming only, not for control of unit

ii. Is warmer/cooler adjust desired for room sensor?

1. Yes, required – to be added in Base Bid

g. VAV Boxes with reheat coil:

i. Discharge air temp sensor

1. Provide ADD ALTERNATE - this will be for alarming only, not for control of unit

ii. Is warmer/cooler adjust desired for room sensor?

1. Yes, required – to be added in Base Bid

h. Vertical Unit Ventilators:

i. Replace existing sequence of operation reflected in Exhibit C with new Exhibit D (Sequence of Operations – Vertical Unit Ventilators) – dated 7/28/2026

ACKNOWLEDGEMENT – ADDENDUM NO. 1

All bidders must acknowledge receipt of this Addendum No. 1 by signing and returning this form with their bid submission, or by noting receipt of this addendum in the space provided on the Bid Form.

Company Name: _____________________________________________________________

Authorized Signature: __________________________________________________________

Printed Name: ________________________________________________________________

Date: ________________________________________________________________________

END OF ADDENDUM NO. 1