ITB-2425-111 RPHS Chiller Replacement Addendum 1.pdf

NORTH CLACKAMAS SCHOOL DISTRICT

REX PUTNAM HIGH SCHOOL CHILLER REPLACEMENT PROJECT

(ITB-2425-111)

ADDENDUM ONE (1) 16 JANUARY 2025

PAGE 1 OF 4 (Plus Listed Attachments)

THE FOLLOWING CHANGES, ADDITIONS, AND DELETIONS TO THE CONTRACT DOCUMENTS POSTED 16

JANUARY 2025 HEREBY BECOME A PART OF THE CONTRACT DOCUMENTS.

NOTIFY ALL SUBCONTRACTORS AFFECTED BY THIS ADDENDUM.

REMOVE COBID UTILIZATION REQUIREMENTS ATTACHMENT (PAGE 20-21 OF 00 DOCS).

DISREGARD PAGES 21-39 OF SECTION 26 00 00 ELECTRICAL SPECIFICATIONS (DUPLICATED).

ADD TO SCOPE OF WORK:

COMMISSIONING REQUIREMENTS

The Contractor shall coordinate and work directly with the District's designated commissioning consultant throughout the commissioning process for the new chiller system and associated controls.

This coordination shall include, but is not limited to:

a) Participating in commissioning meetings and planning sessions as scheduled by the District's consultant

b) Providing access to equipment, controls, and documentation as required for commissioning activities

c) Supporting functional performance testing of the chiller and control systems

d) Addressing and resolving any issues identified during the commissioning process

e) Providing training to facility personnel in conjunction with the commissioning consultant

The Contractor shall include all costs associated with these commissioning support activities in their bid price. No additional compensation will be provided for commissioning coordination and support.

PLAN REVISIONS:

1. See Revised E0.0 FP Sch

2. See Revised E1.0 – FP Demo

3. See Revised E2.0 – FP Elec

4. See Revised M0.01 Mechanical Schedules & Details

5. See Revised M0.02 Mechanical Schedules & Details

6. See Revised M1.0 Mechanical Plan Demo and New Work

ATTACHMENTS TO THIS ADDENDUM:

1. Revised E0.0 FP Sch

2. Revised E1.0 – FP Demo

3. Revised E2.0- FP Elec

4. Revised M0.01 Mechanical Schedules & Details

5. Revised M0.02 Mechanical Schedules & Details

6. Revised M1.0 Mechanical Plan Demo and New Work

QUESTIONS AND ANSWERS

Question 1: Will the awarded vendor be responsible for the disposal of old equipment?

Answer 1: Yes.

Question 2: Would you consider the following chiller alternatives?

SMARDT air-cooled chillers 40-520 tons. Highest efficiency level, ultra quiet, low maintenance chillers.

These are a great fit for K-12 and higher education buildings that need low sound levels. Also for applications where very low maintenance, high reliability and low cost of operation are desired.

Quantech (by York/JCI), quick ship air cooled chillers 40-340 tons These are traditional scroll and screw chillers that are made at the same factory as YORK. Quantech chillers operates on a pre-built basis to narrow lead times significantly, with most models available for immediate shipping.

Answer 2: We can’t approve this equipment alternative for the following reasons:

Equipment performance is below basis of design.

Electrical requirements are 100A and 200A over basis of design and would require additional electrical costs associated with new service.

Inlet and outlet connection on the proposed chiller do not match existing or basis of design and may result in additional cost.

Equipment clearance of proposed units exceeds available clearances in the courtyard area and would result in additional costs of removing wall/enclosure.

Question 3: Can TACO equipment be used as a substitution for the Bell & Gossett equipment?

Answer 3: Yes, TACO is an approved equal.

Question 4: In the Pump Schedule, Note: 5 Provide a 4” housekeeping pad but in the

Base Mounted Pump Detail it is written, New 4” housekeeping pad or inertia base. Is it either (2) new 4” concrete housekeeping pads, (2) new inertia bases, or is it both?

Answer 4: SDC would like to update the documents to indicate a 4" housekeeping pad and inertia base are required.

Question 5: Will the new chiller be secured directly to the concrete slab as it currently is, or will it be elevated off the concrete slab with either engineered isolation springs or rubber pads? Having any chiller elevated off the concrete slab with either springs or rubber pads makes it easier for cleaning the debris from under the chiller when it is being serviced.

Answer 5: SDC doesn't believe spring isolators are necessary. Fastening the baseframe of the chiller directly to concrete should be fine.

Question 6: Would you accept Danfoss series VLT HVAC Drives (VLT HVAC Drive FC 102) as an equal substitution?

Answer 6: Yes, we accept this as an equal substitution.

Question 7: Per M0.2 Sheet Note 3 “Provide New Flow Sensor, Data Industrial, SDI Series Inline Turbine

Flow Meter, or Approved Equal. Install Per Manufacturer’s Recommendations.”, is it acceptable to provide the Onicon F1200 series in lieu of the Data Industrial version?

Answer 7: Yes, it is acceptable.

Question 8: Would you accept Dunham Bush ACHX-EVE300T Air Cooled Chiller as an equal substitution?

Answer 8: No, this is not accepted because the electrical load is too large and the service clearances exceed those available in the mechanical area where the chiller is.

END OF ADDENDUM ONE (1)