SECTION 23 09 14
PNEUMATIC AND ELECTRIC INSTRUMENTATION AND CONTROL DEVICES FOR HVAC
BASED ON DSF MASTER SPECIFICATION DATED 7/5/12
This section has been written to cover most (but not all) situations that you will encounter. Depending on the requirements of your specific project, you may have to add material, delete items, or modify what is currently written. The Division of State Facilities expects changes and comments from you.
P A R T 1 - G E N E R A L
SCOPE
This sections includes pneumatic control system specifications for all HVAC work as well as related pneumatic control for systems found in other specification sections. Included are the following topics:
PART 1 - GENERAL
Scope
Point List
Related Work
Reference
Work Not Included
Quality Assurance
Reference Standards
System Description
Submittals
Demolition
Design Criteria
Operation and Maintenance Data
Material Delivery and Storage
PART 2 - PRODUCTS
Air Piping
Control Air Supply
Air Compressors
Surge Tanks
Refrigerated Air Dryers
Pressure Reducing Air Valves
Control Dampers
Control Valves
Control System Instrumentation
Thermostat Guards
Electric/Electronic Thermostats
Pneumatic Thermostats
Pneumatic Humidistats
Receiver Controllers
Pneumatic Transmitters
Pneumatic System Accessories
Duct Smoke Detector and Fire Alarm Interface Modules
Air Flow Stations
Water Flow Measurement
Steam Flow Measurement
Time Clocks
Temperature Control Panels
Temperature Sensors
Humidity Sensors
Pressure Transducers (Air)
Pressure Transducers (Liquid/Steam)
Differential Pressure Switches
Current Status Switches
Electric to Pneumatic Transducers
Carbon Dioxide (CO2) Sensor
Condensation Monitors
Fume Hood Presence Sensors
Power Supplies
PART 3 - EXECUTION
Installation
Air Piping
Wire and Air Piping Conduit and Tubing Installation Schedule
Air Compressors
Refrigerated Air Dryers
Control and Smoke Dampers
Control Valves
Control System Instrumentation
Room Thermostats and Temperature Sensors
Low Limit Thermostats (Freezestats)
Air Flow Stations
Liquid and Steam Flow Sensors
Pressure Transducers
Temperature Control Panels
Differential Pressure Switches
Air Pressure Safety Switches
Current Status Switches
Construction Verification Items
Agency Training
POINT LIST (Section 23 09 15)
This point list should detail every point wired to the DDC controllers provided under Section 23 09 23 or 23 09 24 and/or 23 09 25 and should be used to clarify the scope of work for the contractor providing work under this Section. Do not use one point chart for multiple systems unless the systems have completely identical points. Use point list templates provided by DSF.
RELATED WORK
Section 01 91 01 or 01 91 02 – Commissioning Process
Section 23 05 93 - Testing, Adjusting, and Balancing for HVAC - Coordination
Section 23 09 15 - Direct Digital Control Input/Output Point Summary Tables
Delete 23 09 24 or 23 09 23 and/or 23 09 25 depending on whether the DDC controls are bid or negotiated and/or integrated.
Section 23 09 23 - Direct Digital Control System for HVAC
Section 23 09 24 - Direct Digital Control System for HVAC (Informational purposes only)
Section 23 09 25 - Direct Digital Control System for Integrated Terminal Units
Section 23 09 93 - Sequence of Operation
Section 23 33 00 - Ductwork Accessories - for control damper installation
Division 23 - HVAC - Equipment provided to be controlled or monitored
Division 26 - Electrical - Installation requirements & Equipment provided to be controlled or monitored
Division 28 - Electronic Safety and Security
REFERENCE
Applicable provisions of Division 1 govern work under this section.
WORK NOT INCLUDED
Include the following sentence only when working with a central campus automation system or an existing building undergoing remodeling or addition and the existing DDC system will be extended. Contact DSF engineering personnel if there are questions.
Direct digital controls and energy management interface, as specified in Section 23 09 24.
QUALITY ASSURANCE
Installing contractor must be a manufacturer's branch office or an authorized representative of a Direct Digital Control (DDC) equipment manufacturer that provides engineering and commissioning of the DDC equipment. Submit written confirmation of such authorization from the manufacturer. Indicate in letter of authorization that installing contractor has successfully completed all necessary training required for engineering, installation, and commissioning of equipment and systems and that such authorization has been in effect for a period of not less than three years. DDC equipment may or may not be required to be installed by this contractor as part of the project, but the intent of this quality assurance specification is to ensure that the installing contractor has the capabilities to engineer, install, and commission the field devices supplied under this section for temperature control.
REFERENCE STANDARDS
ANSI B16.22 Wrought Copper and Wrought Copper Alloy Solder Joint Pressure Fittings
ANSI/ASTM B32 Specification for Solder Metal
ASTM B75 Seamless Copper Tube
ASTM D1693 Environmental Stress-Cracking of Ethylene Plastics
ASTM D 635 Standard Test Method for Rate of Burning and/or Extent and Time of Burning of Plastics in a Horizontal Position
UL 94 Tests for Flammability of Plastic Materials for Parts in Devices and Appliances
AMCA 500-D Laboratory Method of Testing Dampers for Rating
SYSTEM DESCRIPTION
Select or modify one of the following descriptions after discussion with DSF.
System is to be pneumatic.
System is to be electric/electronic.
System is to use direct digital control logic with pneumatic actuation.
System is to use direct digital control with electric actuation for air handling units; direct digital control with electric actuation for room temperature, room humidity, and terminal airflow control; and electric control for other terminal units.
System is to use direct digital control with pneumatic actuation for air handling units; direct digital control with electric actuation for room temperature, room humidity, and terminal airflow control; and electric or pneumatic control for other terminal units.
All pneumatic tubing and electrical wiring are to be permanently tagged or labeled (within one inch of terminal strip) with a numbering system to correspond with the "Record Drawings". Tags or labels shall be printed not hand written.
SUBMITTALS
Include the following information:
Manufacturer’s data sheets indicating model number, pressure/temperature ratings, capacity, methods and materials of construction, installation instructions, and recommended maintenance. General catalog sheets showing a series of the same device is not acceptable unless the specific model is clearly marked.
Schematic flow diagrams of systems showing fans, pumps, coils, dampers, valves, and other control devices. Label each device with setting or adjustable range of control. Indicate all wiring, clearly, differentiating between factory and field installed wiring. Wiring should be shown in schematics that detail contact states, relay references, etc. Diagrammatic representations of devices alone are not acceptable.
Details of construction, layout, and location of each temperature control panel within the building, including instruments location in panel and labeling. Also include on drawings location of mechanical equipment controlled (room number), horsepower and flow of motorized equipment (when this data is available on plans), locations of all remote sensors and control devices (either by room number or column lines).
Schedule of control dampers indicating size, leakage rating, arrangement, pressure drop at design airflow, and number and size of operators required.
Schedule of control valves indicating system in which the device is to be used, rated capacity, flow coefficient, flow required by device served, actual pressure drop at design flow, size of operator required, close-off pressure, and locations where valves are to be installed.
A complete description of each control sequence for equipment that is not controlled by direct digital controls. Direct digital controlled equipment control sequences will be provided by the DDC control contractor.
Calculations completed to determine size of control air compressor(s) and dryer (s).
Prior to request for final payment, submit record documents which accurately record actual location of control components including panels, thermostats, wiring, and sensors. Incorporate changes required during installation and start-up.
Include the following paragraphs only when working with DDC Control System that is not part of the bid and negotiated by the State utilizing section 23 09 24. Contact DSF engineering personnel if there are questions.
Provide a complete set of Submittal Drawings to the 23 09 24 DDC Contractor to enable them to coordinate the interfacing of the 23 09 14 controls with the 23 09 24 supplied controls. The 23 09 24 contractor is also required to provide any information regarding their supplied control equipment to the 23 09 14 contractor so that the 23 09 14 contractor can complete his engineered Submittal Drawings.
Provide a complete set of Record Drawings to the 23 09 24 DDC Contractor to enable them to provide a complete composite set of drawings incorporating DDC and electric/pneumatic controls as specified.
All submittals are to comply with submission and content requirements specified in specification Section 01 91 01 or 01 91 02.
DEMOLITION
The consulting engineer should verify and specify in detail what is to be demolished. Special attention should be given to existing temperature control air systems as to whether it should be demolished or re-used.
Where existing control devices, piping, or wiring are discontinued from use, remove and turn over to owner. If owner does not want them remove from premises. Remove any previously abandoned control devices in a similar manner.
DESIGN CRITERIA
Size all control apparatus to properly supply and/or operate and control the apparatus served.
Provide control devices subject to corrosive environments with corrosion protection or construct them so they are suitable for use in such an environment.
Provide devices exposed to outside ambient conditions with weather protection or construct them so they are suitable for outdoor installation.
Use only UL labeled products that comply with NEMA Standards. Electrical components and installation to meet all requirements of the electrical sections (Division 26) of project specifications.
|
