Q_A and RFI_Response.pdf

Question

1. In reference to SOW Section 3.1, "Controller Requirements," could you please provide details on the existing controllers and the point count for AHU-5?

Answer

Existing AHU Unitary Controllers

• Controller Type Honeywell Spyder

• Model Number PUL6438S

• Quantity Installed 2 Controllers

Point Count Summary

Controller #1 (Honeywell Spyder PUL6438S)

• Total Point Count 36

Controller #2 (Honeywell Spyder PUL6438S)

• Total Point Count 13

AHU-05 Total Point Count

• Total Points 49

Additional Information – Existing VAV Controllers

• Controller Model: Honeywell W7751H2025

• Total Number of VAV Controllers 29

Approximate Point Count per VAV Controller 34 Points

2. REQUEST FOR INFORMATION (RFI) RESPONSE

1. Existing System Documentation

Building As-built drawing and document release is subject to verification of the required security clearance level and approval by the Contracting

Officer. Relevant information will be made available during the site visit or as otherwise directed by the Contracting Officer.

2. Existing Point Lists

AHU-5 is currently controlled by two Honeywell Spyder controllers (Model

PUL6438S). Controller No. 1 has 36 points, and Controller No. 2 has 16 points. The existing VAV controllers are Honeywell Model W7751H2025.

Each VAV box has approximately 34 control points.

3. Existing Sequence of Operations

N/A

4. VAV Controller Requirements

All twenty-nine (29) VAV terminal units are of the same configuration.

Each VAV box is equipped with an electric reheat coil and utilizes the same controller and room thermostat arrangement. No fan-powered VAV boxes are included, and no chilled water or hot water coils are associated with the

VAV terminal units. Point requirements are consistent across all VAV boxes.

5. AHU Controller Requirements

AHU-5 is currently controlled by two Honeywell Spyder controllers (Model

PUL6438S). Controller No. 1 has 36 points, and Controller No. 2 has 16 points. Contractors shall verify all field conditions and point requirements during the site survey.

6. Approved Honeywell Models

The required VAV controller is the Honeywell Optimizer Controller, Model

VAA-VA75T24NM. Contractors shall base their proposal on this controller model.

7. Existing BAS Platform

The existing BAS front-end platform is Niagara N4, Version 4.11.0.142.

8. Integration Requirements

All new controllers shall integrate with the existing Honeywell BAS platform and operate in accordance with the project requirements.

9. Graphics Development

A separate document containing examples of the existing BAS graphics for

AHU-5 and associated VAV terminal units will be provided for reference.

10. Existing Network Infrastructure

The existing control network utilizes the LonWorks communication protocol in a daisy-chain topology.

11. T1L Adapter Requirements

Contractors shall determine the required quantity based on the specified controller architecture and field conditions.

12. Existing Wiring Reuse

Existing control wiring may be reused where found to be operational and suitable for the intended application. The existing network utilizes twisted-pair copper cabling for LonWorks communication. The specified T1L-enabled controllers were selected to allow reuse of the existing cabling infrastructure while supporting Ethernet communication over a single twisted pair.

13. Commissioning Requirements

The contractor shall perform commissioning and testing necessary to demonstrate full system functionality and compliance with the project requirements.

14. Functional Performance Testing

The contractor shall develop and execute functional performance testing procedures for review and approval.

15. Training Requirements

Training should be provided for up to three (3) personnel, consisting of one primary BAS technician and two backup personnel.

16. Access Restrictions

All personnel shall comply with Embassy security requirements. Access procedures and work schedules will be coordinated in advance.

17. Material Importation

Contractors are responsible for all importation, customs clearance, taxes, duties, and associated costs.

18. Spare Parts

Please include a minimum of one spare controller and one spare thermostats as part of the project closeout deliverables. No additional spare quantities are required beyond these minimum requirements.

19. Warranty Service

The contractor shall provide warranty support in accordance with the contract requirements and manufacturer recommendations.

20. Project Phasing

Installation and cutover activities may be phased as necessary to minimize disruption to facility operations.

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