Air Sequal SOW.pdf

Statement of Work: AirSequal™ Compressed Air System Control

1. GENERAL

1.1 Background: The Coast Guard seeks to procure an AirSequal™ system to manage and optimize the performance of its compressed air system, (2) Sullair 3700B Series 50hp compressors model # 3709B. This system will improve eƯiciency and reliability by sequencing compressor operation based on system demand and pressure.

2. SCOPE

2.1 System Description: The AirSequal™ system will employ a PLC-based control strategy to sequence the operation of 2-6 compressors. A single pressure transmitter will provide feedback to the system, allowing the AirSequal™ to start, stop, load, and unload compressors as needed to maintain desired system pressure. The system includes features to prevent simultaneous starting, optimize loading/unloading based on pressure rate of change, and manage minimum run/stop times.

2.2 Features and Functionality:

Sequencing: The AirSequal™ will automatically start/stop and load/unload compressors based on system pressure and demand.

Preventative Measures: Logic is incorporated to prevent simultaneous starting of multiple compressors and to optimize loading/unloading based on pressure rate of change.

Compressor Setup Parameters: Individual compressor parameters (e.g., minimum run time, cool down time, start/stop signal type) can be configured through the HMI.

Auto Sequence Rotation: Two auto-rotation functions (runtime-based and preset sequence) are available to equalize compressor runtime.

FlowSeq (Optional): With an optional flow meter, the AirSequal™ can select the optimal compressor lineup based on plant air demand using predefined flow bands and compressor sequences.

Electronic Variable Capacity Control: Replaces pneumatic VCC regulators with electronic I/P for improved control and reliability. Can coordinate multiple VCC devices.

Base/Trim Control: Utilizes compressors with modulation capabilities for enhanced eƯiciency.

Single Point of Control: Provides centralized control and monitoring of the entire compressed air system.

Scheduling: OƯers full compressor and system scheduling capabilities.

2.3 Input/Output Points (per compressor):

Discrete Inputs: Remote Mode Indication, Running Indication, Loaded Indication, Tripped Indication.

Discrete Outputs: Auto On Command, Start Command, Stop Command, Load/Unload Command, Base/Trim Command, Electronic Variable Capacity Control (Optional).

3. CONTRACTOR RESPONSIBILITIES:

The contractor shall be responsible for the following:

Providing all OEM compressor wiring diagrams.

Confirming compressors have remote control capabilities.

Installing the AirSequal™ panel in the preferred location.

Installing the pressure transducer downstream of all cleanup equipment.

Running communication cables/conduit from the AirSequal™ panel to each compressor control panel.

Running instrument cable from the pressure transducer to the AirSequal™ panel.

Completing all wiring according to the provided wiring specification.

Complete ALL installation and start-up services needed

4. PERIOD OF PERFORMANCE: 7/1/2025-7/30/2025

5. DELIVERY LOCATION AND POC: 1500 15th Street, Mobile Alabama 36615.

POC: Chad H. Shaw 228-239-7456

6. SUBMITTALS AND APPROVALS: Catalog cuts, general arrangement drawings, and other information shall be submitted by the manufacturer as required and as necessary to secure approval of the equipment.