7103-Spec 230900 HVAC Controls-Both Proj-Add# 3SECTION 230900 – INSTRUMENTATION AND CONTROL FOR HVAC
PART 1 – GENERAL
1.1 RELATED DOCUMENTS
A. Drawings and general provisions of the Contract, including General and Supplementary
Conditions and Division 01 Specification Sections, apply to this Section.
1.2 SUMMARY
A. This Section includes control equipment for HVAC systems, components and other
systems shown to be controlled by the Building Automation System (BAS), including, but
not limited to, all computer software and hardware, controllers, sensors, transmission
equipment, local panels, installation, engineering, supervision, commissioning,
acceptance testing, training and warranty service necessary for a complete and working
system.
B. The Contractor shall furnish and install the controls including all necessary hardware and
all operating and applications software necessary to perform the control sequences of
operation as specified in Division 23 Section “Sequence of Operations for HVAC Controls”.
The controls contractor shall coordinate all work with the stand-alone controls provided
with the equipment being controlled.
C. The intent is that all facility operations new or existing would be stand-alone.
D. All components of the system – local controllers, unitary controllers, etc. shall
communicate using the BACnet protocol, as defined by the most current edition of
ASHRAE Standard 135 and as specified herein or equal. Proprietary communications shall
not be acceptable.
E. The BAS contractor shall review and study all drawings and the entire specification to
become familiar with the equipment and system operation and to verify the quantities
and types of controllers and devices to be provided.
F. All interlock, control and power wiring and installation of control devices associated with
the equipment described in this specification, and sequence of operations, shall be
provided under this Contract. All power wiring shall conform to the methods and
materials described in Division 26 Section “Low-Voltage Electrical Power Conductors and
Cables”.
G. Provide services and manpower necessary for commissioning of system in coordination
with the HVAC Contractor, Testing and Balancing Contractor, Electrical Contractor and
Owner’s Representative. Refer Division 23 Section “Testing, Adjusting and Balancing for
HVAC”.
H. All work performed under this section of the specifications will comply with all codes, laws
and governing bodies. If the drawings and/or specifications conflict with governing codes,
the Contractor shall submit a proposal with appropriate modifications to the project to
meet code restrictions. If this specification and associated drawings exceed governing
code requirements, the specification will govern. The Controls Contractor shall obtain and
pay for all necessary construction permits and licenses associated with this scope of work.
1.3 QUALITY ASSURANCE
A. Building Automation System (BAS) shall be manufactured, tested and installed in
accordance with the following standards:
1. National Electrical Manufacturers Association (NEMA).
2. Underwriters Laboratories (UL).
3. BACnet Testing Laboratories (BTL).
4. National Fire Protection Association (NFPA).
B. Installer Qualifications: Automatic control system manufacturer's authorized
representative who is trained and approved for installation of system components
required for this Project.
C. Upon completion of the installation, the Contractor shall thoroughly inspect, check,
adjust, calibrate, and make ready for use all devices/sensors comprising the control
system and certify that they are installed in accordance with "Record" Drawings.
D. Electrical Components, Devices, and Accessories: Listed and labeled as defined in NFPA
70, Article 100, by a testing agency acceptable to authorities having jurisdiction, and
marked for intended use.
E. Data Communications Protocol: Certify that each proposed Controls system component
complies with ASHRAE Standard 135 for each protocol.
F. Controls system component testing: Comply with ASHRAE 135.1 and all addenda for all
controllers.
G. All controllers used to control or monitor equipment and/or field devices shall be tested,
compliant with and carry the mark of the BACnet Testing Laboratories (BTL):
1. Building Controllers.
2. Advanced Application Controllers.
3. Application Specific Controllers.
H. Quality Management Program
1. Designate a competent and experienced employee to provide BAS Project
Management. The designated Project Manager shall be full time on this project
and be empowered to make financial, technical, scheduling and related decisions
on behalf of the BMS Contractor. At minimum, the Project Manager shall:
a. Serve as the point of contact for the Construction Team.
b. Manage the scheduling of the work to ensure that adequate materials,
labor and other resources are available when needed.
c. Lead and be involved in the coordination efforts with other trades.
d. Be responsible for the work and actions of the BAS workforce on site.
I. As evidence and assurance of the Contractor’s ability to support the project’s
commissioning efforts. The Contractor must have successfully completed three
commissioned projects totaling at least the value of this contract, as a minimum.
J. This system of equipment and software shall be provided and installed by the single local
factory trained and authorized sales, installation and service agent of Reliable Controls
(Enviromatics Systems).
1.4 SUBMITTALS
A. Product Data: For all products listed in Part 2 below provide detailed manufacturer
product data, technical literature indicating dimensions, finishes, material, weights,
performance characteristics, electrical characteristics, capacities, loads, required
clearances, method of field assembly, components, and location and size of each field
connection. Include manufacturer's technical literature for each control device. Indicate
finishes for materials, and installation and startup instructions for each type of product
indicated.
1. Control System Software: Include technical data for operating system software,
operator interface, color graphics, and other third-party applications including all
software licensing agreements.
2. Controlled Systems: Instrumentation list with element name, type of device,
manufacturer, model number, and product data. Include written description of
sequence of operation including schematic control diagram.
B. Shop Drawings:
1. Bill of materials of equipment indicating quantity, manufacturer, and model
number.
2. Schematic flow/control diagrams showing fans, pumps, coils, dampers, valves,
and control devices.
3. Wiring Diagrams: Power, signal, and control wiring.
4. Conductor numbering or color code schedules.
5. Details of control panel faces, including controls, instruments, and labeling.
6. Schedule of identification labels for controllers and devices.
7. Floor plans indicating:
a) Control panel locations.
b) Room sensor locations labeled with height above finished floor.
8. Written description of sequence of operation.
9. Schedule of dampers including size, leakage, and flow characteristics.
10. Schedule of valves including flow characteristics.
11. Schedule of airflow monitoring stations including airflow characteristics.
12. Control System Hardware:
a) Wiring diagrams for control units with termination numbers.
b) Schematic diagrams and floor plans for field sensors and control
hardware.
c) Schematic diagrams for control, communication, and power wiring,
showing trunk data conductors and wiring between operator workstation
and control unit locations.
13. Control System Software: Graphics outline and “Print Page” examples of final
product indicating monitored systems, data (connected and calculated) point
addresses, output schedule, and operator notations.
14. Controlled Systems:
a) Schematic diagrams of each controlled system with control points labeled
and control elements graphically shown, with wiring.
b)
Scaled drawings showing mounting, routing, and wiring of elements
including bases and special construction.
c) Written description of sequence of operation including schematic
diagram.
d) Points list.
15. Submit hard and soft copies in file format compatible with AutoCAD 2012.
C. Data Communications Protocol Certificates: Certify that each proposed control system
component complies with ASHRAE Standard 135 for each protocol.
D. Software and Firmware Operational Documentation: Include the following:
1. Software operating and upgrade manuals.
2. Program Software Backup required to reinstall and configure system in the event
of a
3. catastrophic failure: On CD, complete with data files.
4. Device address list.
5. Printout of software application and graphic screens.
6. Software license required by and installed for operator workstations and controls
systems.
E. Software Upgrade Kit: For Owner to use in modifying software to suit future systems
revisions or monitoring and control revisions.
F. Field quality-control test report forms.
G. Contract Closeout Documentation:
1. Operation and Maintenance Data: Include emergency, operation, and
maintenance manuals.
2. In addition to items specified in Division 01 Section “Operation and Maintenance
Data,” include the following:
a. Maintenance instructions and lists of spare parts for each type of control
device.
b. Interconnection wiring diagrams with identified and numbered system
components
c. Keyboard illustrations and step-by-step procedures indexed for each
operator function.
d. records and list of set points.
3. Training provided by BAS installer.
1.5 WARRANTY
A. Controls Contractor shall guarantee all system components and installations to be free
from defects for one (1) year from the date of acceptance as determined by the Owner.
Any defects found during this period shall be repaired and/or replaced at no cost to the
Owner. The Controls Contractor shall provide maximum of 24-hour response time for
trouble calls or maintenance.
B. Controls Contractor shall provide all corrective software modifications or updates
available from the software manufacturer during warranty service periods. All user
documentation shall be updated on user and manufacturer backup software disks.
1.6 WORK BY OTHERS
A. The installation of motor starters that are not factory installed, thermal overload
switches, and power wiring to motors, starters, and thermal overload switches, is
specified in another section. This section includes the furnishing and installing of all
controls, devices, interlocks, and wiring to provide a complete operating system as
outlined in the sequence of operation.
B. The following general work scope of Contractors requiring coordination by the
Controls Contractor includes, but is not limited to:
1. The Sheet Metal Contractor shall:
a. Install all automatic dampers and provide necessary blank-off plates or
transitions required to install dampers that are smaller than duct size.
b. Assemble multiple section dampers with required interconnecting
linkages and extend required number of shafts through duct for external
mounting of damper motors.
c. Furnish and install necessary sheet metal baffle plates to eliminate
stratification and provide air volumes specified. Locate baffles by
experimentation. Affix and seal permanently in place once stratification
problems have been eliminated.
d. Furnish and install access doors or other approved means of access
through ducts for service to control equipment.
e. Install duct mounted airflow monitoring stations.
f. Install AHU and duct mounted heat and smoke detectors.
2. The General Contractor shall:
a. Provide access doors or other means of access through ceilings and walls
for
b. services to control equipment.
c. Provide necessary housekeeping pads and, where required, concrete
inertia bases.
3. The Electrical Contractor shall:
a. Furnish fire alarm system compatible duct mounted heat and smoke
detectors and wire to Fire Alarm System. Coordinate with the mechanical
contractor the exact placement of duct mounted detectors.
b. Provide relay cabinets, required for lighting control and wiring/conduits
to the EMS panels.
c. Provide dedicated 120VAC circuits in j-boxes throughout all building
areas for control panel and terminal box control power.
PART 2 – PRODUCTS
2.1 ELECTRONIC SENSORS
A. Description: Vibration and corrosion resistant; for wall, immersion, or duct mounting as
required.
B. Thermistor, Temperature Sensors and Transmitters:
1. Sensor Types: Provide one of the following:
a. 100 ohm (+/-0.12%) platinum resistance temperature detectors having a
coefficient of resistivity of 0.00385 ohms/ohm/°C. Provide RTD
temperature transducers with of 4-20 mA output signal variations of less
than 0.2% of full scale output for supply voltage variations +/-10% and
integral and accessible zero and span adjustment.
b. 10,000-ohm thermistor having an accuracy of .5°F at calibration point of
75°F may be used for room temperature only.
2. Accuracy: Plus or minus 0.5°F at calibration point.
3. Wire: Twisted, shielded-pair cable.
4. Insertion Elements: Single point in center of duct or coil face area, use where not
affected by temperature stratification or where airflow cross sectional area is
smaller than 9 sq. ft.
5. Averaging Elements: Twice the diagonal length of coil or duct. Use where prone
to temperature stratification or where airflow cross sectional area is larger than
10 sq. ft.
6. Insertion Elements for Liquids: Brass or stainless-steel socket with minimum
insertion length of 2-1/2 inches or 75% of pipe inside diameter, whichever is less.
7. Room Thermostats: Off-white enclosure capable of being mounted on a standard
single gang electrical back box. Provide each with:
a. Local display of current space temperature.
b. Local set point adjustment (+/- 5 deg F) and temporary override
button, both of which can be overridden by BAS at OWS.
c. RJ45 connection for connection to PDU.
8. Outside-Air Sensors: Watertight inlet fitting, shielded from direct sunlight.
C. RTDs and Transmitters:
1. Accuracy: Plus or minus 0.2 percent at calibration point.
2. Wire: Twisted, shielded-pair cable.
3. Insertion Elements in Ducts: Single point, use where not affected by temperature
stratification or where ducts are smaller than 9 sq. ft.
4. Averaging Elements in Ducts: Use where prone to temperature stratification or
where ducts are larger than 9 sq. ft.; length as required.
5. Insertion Elements for Liquids: Brass socket with minimum insertion length 2-1/2
inches.
6. Room Sensor cover Construction: Off-white enclosure capable of being mounted
on a standard single gang electrical back box.
D. Pressure Transmitters/Transducers:
1. Static-Pressure Transmitter: Non-directional sensor with suitable range for
expected input, and temperature compensated. Accuracy of 2 percent of full
scale with repeatability of 0.5 percent. Linear output of 4 to 20 mA.
a. Building Static-Pressure Range: 0- to 0.25-inch wg.
b. Duct Static-Pressure Range: 0- to 5-inch wg.
2. Differential-Pressure Switch (Air): Snap acting, with pilot-duty rating and with
suitable scale range and differential.
3. Pressure Transmitters: Direct acting for gas, liquid, or steam service; range
suitable for system; linear output 4 to 20 mA.
2.2 STATUS SENSORS
A. Low Limit Temperature Switch: Minimum 20 ft. element for freeze protection. Serpentine
across the face of the coil and of sufficient length or number for three passes across the
width of the coil it is protecting. Connect in series with other safety devices to de-energize
fans serviced when a drop-in temperature below set point is detected.
B. Voltage Transmitter (100- to 600-V ac): Comply with ISA 50.00.01, single-loop, self-
powered transmitter, adjustable, with suitable range and 1 percent full-scale accuracy.
C. Power Monitor: 3-phase type with disconnect/shorting switch assembly, listed voltage
and current transformers, with pulse kilowatt hour output and 4- to 20-mA kW output,
with maximum 2 percent error at 1.0 power factor and 2.5 percent error at 0.5 power
factor.
D. Current Switches: Self-powered, solid-state with adjustable trip current, selected to
match current and system output requirements.
E. Electronic Damper Position Indicator: Visual scale indicating percent of travel and 2- to
10-V dc, feedback signal.
2.3 AIRFLOW/TEMPERATURE MEASURING STATIONS WITH TRANSMITTER
A. Basis of Design: EBTRON, Inc.
B. Duct and Plenum Mounted Airflow Station: Combination of air straightener and
multiport, self - averaging pitot tube station.
1. Casing: Galvanized-steel frame.
2. Flow Straightener: Aluminum honeycomb, 3/4-inch parallel cell, 3 inches deep.
3. Each ATMD shall consist of one or more sensor probes and a single, remotely
mounted, 32-bit microprocessor-based transmitter capable of independently
processing up to 16 independently wired sensor nodes contained in one or more
probe assemblies per measurement location.
a. Each sensor node shall contain two individually wired, hermetically
sealed bead-in glass thermistors.
b. Thermistors shall be mounted in the sensor node using a marine-grade,
waterproof epoxy. Thermistor leads shall be protected and not exposed
to the environment. Thermistor leads shall not be fastened to the
thermistor semiconductor substrate by weld or solder connections.
c. The airflow rate at each sensor node shall be equally weighted and
arithmetically averaged by the transmitter prior to output. All integrated
circuitry shall be temperature rated as ‘industrial-grade’. Submissions
containing ‘commercial grade’ integrated circuitry are not acceptable.
d. The temperature at each sensor node shall be arithmetically averaged or
velocity weighted and averaged by the transmitter prior to output, either
as field selected by the contractor or user.
e. Each transmitter shall have a 16-character alpha-numeric display capable
of displaying airflow, temperature, system status, configuration settings
and diagnostics.
f. Other than the thermistor sensors, no other electronic components shall
be located at the sensing node.
g. Devices using chip-in-glass, epoxy-coated or diode-case chip thermistors
are not acceptable.
h. Devices with RJ-45 connections exposed to the environment or having
electronic circuitry mounted in or at the sensor node are not acceptable.
i. Pitot tubes and arrays are not acceptable.
j. Vortex shedding devices are not acceptable.
4. All Sensor Probes
a. Each sensor node, consisting of two thermistor-sensors and their
structural housing, shall independently determine the airflow rate and
temperature at each measurement point.
b. Each sensor node shall be factory calibrated at a minimum of 16 airflow
rates and 3 temperatures to standards that are traceable to the National
Institute of Standards and Technology (NIST). Thermistor sensor
calibrations traceable only to temperature standards are not acceptable.
c. Airflow accuracy shall be +/-2% of Reading over the entire operating
airflow range of not less than 0 to 5,000 fpm (25.4 m/s).
d. Devices whose overall performance at the host controller input terminals
is the combined accuracy of the transmitter and sensor probes shall
demonstrate that the total accuracy meets the performance
requirements of this specification throughout the measurement range.
e. Temperature accuracy shall be +/-0.14° F (0.08° C) over the entire
operating temperature range of -20° F to 160° F (-28.9° C to 71° C).
f. The operating humidity range for each sensor probe shall be 0-99% RH
(noncondensing). Product design shall consider direct exposure to or
emersion in liquid water and temporary exposure shall not damage the
sensing elements.
g. Each sensor or probe assembly shall not require matching to the
transmitter in the field.
h. A single manufacturer shall provide both the airflow/temperature
measuring probe(s) and transmitter for each measurement location.
5. Duct and Plenum Probes
a. Probes shall be constructed of extruded, gold anodized, 6063 aluminum
tubes or optionally of Type 316 stainless steel tubes. All internal wires
within the tube shall be Kynar coated. PVC insulated conductors are not
acceptable.
b. The number of individual sensor nodes provided for each rectangular
location shall be as follows:
Duct or Plenum Area (ft2) Total # of Nodes/Location
< = 1 1 or 2 1 or 2
> 1 to < 4 4
4 to < 8 6
8 to < 12 8
12 to < 16 12
> = 16 16
c. The number of individual sensor nodes provided for each round or oval
duct location shall approximate the total required for rectangular
locations.
d. Sensor probe design shall be capable of providing up to 8 sensor nodes
per probe.
e. The minimum operating airflow range shall be 0 to 5,000 FPM (25.4 m/s)
unless otherwise indicated on the plans.
f. Each ducted sensor probe shall have an integral, U.L. Listed, plenum rated
cable. Cable jackets and conductor insulation shall be FEP, Teflon-FEP or
Neoflon-FEP. Cables shall include a terminal plug for connection to the
remotely mounted transmitter. All terminal plug interconnecting pins
shall be gold plated. PVC jacketed cables or PVC insulated conductors are
not acceptable with ducted sensor probes.
6. Transmitters
a. The transmitter shall have an integral LCD display capable of
simultaneously displaying airflow and temperature. The LCD display shall
be capable of displaying individual airflow and temperature readings of
each independent sensor node.
b. The transmitter shall be capable of field configuration and diagnostics
using an on-board pushbutton interface and LCD display.
c. The transmitter shall have an on-off power switch and operate on 24 VAC.
Isolation transformers shall not be required.
1) The transmitter shall use a switching power supply, fused and
protected from transients and power surges.
2) The transmitter shall use “watch-dog” circuitry to assure
automatic reset after power disruption, transients and brown-
outs.
d. All interconnecting pins, headers and connections on the main circuit
board, option cards and cable receptacles shall be gold plated.
e. The operating temperature range for the transmitter shall be -20°F to
120°F (-28.9°C to 48.9°C). The transmitter shall be installed at a location
that is protected from weather and water.
f. The transmitter shall be capable of communicating with other devices
using one of the following interface options:
1) Combined linear airflow and temperature analog output signals
and one RS-485 network interface. This shall include: Two field
selectable 0-5VDC / 0-10VDC / 4-20mA (4-wire) outputs, fuse
protected and electrically isolated from all other circuitry; plus,
one field selectable network protocol: BACnet-MS/TP, BACnet-
ARCNET, Modbus-RTU or Johnson Controls N2-Bus.
(a) BACnet devices shall provide analog variables for airflow
and temperature containing individual sensor airflow
rate and temperature data.
2) 10 Base-T Ethernet: Field selectable BACnet Ethernet, BACnet-IP,
Modbus-TCP and TCP/IP
(a) Provide dynamic link libraries and VBA functions to
interface Ethernet devices to Microsoft Excel for remote
monitoring of airflow and temperature using a MS
Windows -based PC.
3) Data logging capability, using a manually removable and
customer provided USB 2.0 flash drive (a.k.a. memory stick or
thumb drive). This option has no other outputs and allows the
transmitter to communicate only with the USB interface. Provide
PC software or files to allow downloading and interpretation of
the logged data.
g. The transmitter shall be capable of providing an infra-red interface for
manually downloading airflow and temperature data or for uploading
transmitter configuration data using a handheld PDA (Palm or Microsoft
Windows Mobile operating systems).
1) Provide PDA upload/download software for multiple users.
(a) Download software shall be capable of displaying and
saving individual sensor airflow rates, the average
airflow rate, individual sensor temperatures and the
average temperature received from the transmitter.
(b) Upload software shall be capable of displaying and saving
all setup parameters that can be configured using the on-
board pushbutton interface and LCD display.
2) Provide a Microsoft Excel file capable of creating test and balance
reports from PDA data files transferred to a Windows based PC.
3) Provide a Microsoft Excel file to create configuration data files
that can be transferred from a Windows based PC to a PDA for
upload to one or more transmitters.
h. The transmitter shall be capable of identifying a ‘damaged’ sensor node,
ignore it and continue to operate by correctly averaging the remaining
sensor nodes.
i. Transmitter shall include the following features: Enhanced Output
Integration, Low Airflow Alarm functions and ASHRAE Standard 189.1 and
a Field Calibration Wizard to simplify field setup for adjustments when
desired.
7. The ATMD shall carry the CE Mark for European Union shipments, certifying
compliance with all applicable compliance testing, regulations and EU directives.
8. The manufacturer’s authorized representative shall review and approve
placement and operating airflow rates for each measurement location indicated
on the plans.
a. A written report shall be submitted to the consulting mechanical
engineer if any measurement locations do not meet the manufacturer’s
placement requirements.
2.4 ACTUATORS
A. Electric Motors: Size to operate with sufficient reserve power to provide smooth
modulating action or two-position action.
1. Comply with requirements in Division 23 Section "Common Motor Requirements
for HVAC Equipment".
2. Permanent Split-Capacitor or Shaded-Pole Type: Gear trains completely oil
immersed and sealed. Equip spring-return motors with integral spiral-spring
mechanism in housings designed for easy removal for service or adjustment of
limit switches, auxiliary switches, or feedback potentiometer.
3. Non-Spring-Return Motors for Dampers Larger Than 25 Sq. Ft.: Size for running
torque of 150 in. x lbf and breakaway torque of 300 in. x lbf.
4. Spring-Return Motors for Dampers Larger Than 25 Sq. Ft.: Size for running and
break away torque of 150 in. x lbf.
B. Electronic Actuators shall be of 0 10 VDC type. Direct-coupled type designed for minimum
60,000 full-stroke cycles at rated torque. The minimum actuator impedance shall be 800
ohms even when more than one actuator is connected in parallel. Spring return shall be
required for two-position (NO/NC) control sequence or for steam valve control. Non-
spring return actuators shall be used for all modulating sequence of control. They shall
conform to all requirements of sequence descriptions specified or scheduled. Main
mechanical equipment actuators shall have a manual position dial to allow manual
positioning of valve in absence of control power.
1. Valves: Size for torque required for valve close off at maximum pump differential
pressure.
2. Dampers: Size for running torque calculated as follows:
a. Opposed-Blade Damper with Edge Seals: 5 inch-lb./sq. ft. Of damper.
b. Opposed-Blade Damper without Edge Seals: 3 inch-lb./sq. ft. of damper.
c. Parallel-Blade Damper with Edge Seals: 7 inch-lb./sq. ft. of damper.
d. Parallel-Blade Damper without Edge Seals: 4 inch-lb./sq. ft of damper.
e. Dampers with 2- to 3-Inch wg of Pressure Drop or Face Velocities of 1000
to 2500 fpm: Increase running torque by 1.5.
f. Dampers with 3- to 4-Inch wg of Pressure Drop or Face Velocities of 2500
to 3000 fpm: Increase running torque by 2.0.
g. Non-Spring-Return Motors for Dampers Larger Than 25 Sq. Ft.: Size for
running torque of 150 in. x lbf and breakaway torque of 300 in. x lbf.
h. Spring-Return Motors for Dampers Larger Than 25 Sq. Ft.: Size for running
and breakaway torque of 150 in. x lbf.
3. Coupling: V-bolt and V-shaped, toothed cradle.
4. Overload Protection: Electronic overload or digital rotation-sensing circuitry.
5. Fail-Safe Operation: Mechanical, spring-return mechanism. Provide external,
manual gear release on non-spring-return actuators.
6. Power Requirements (Two-Position Spring Return): 24-Vac.
7. Power Requirements (Modulating): Maximum 10 VA at 24-V ac or 8 W at 24-V dc.
8. Proportional Signal: 2- to 10-V dc or 4 to 20 mA, and 2- to 10-V dc position
feedback signal with damper position indicator indicating percent of travel.
9. Temperature Rating: Minus 0 degrees to plus 122 deg F.
10. Actuator Housing: Molded or die-cast zinc or aluminum.
11. Comply with NEMA designation, temperature rating, service factor, enclosure
type, and efficiency requirements for motors specified in Division 23 Section
"Common Motor Requirements for HVAC."
12. Size to operate with sufficient reserve power to provide smooth modulating
action or two position action.
a. Permanent Split-Capacitor or Shaded-Pole Type: Gear trains completely
oil immersed and sealed. Equip spring-return motors with integral spiral-
spring mechanism in housings designed for easy removal for service or
adjustment of limit switches, auxiliary switches, or feedback
potentiometer.
2.5 DAMPERS
A. Dampers: AMCA-rated, opposed-blade design; 0.108-inch-minimum thick, galvanized
steel for non-wet locations or 0.125-inch-minimum thick, extruded-aluminum for exterior
louver and wet locations, frames with holes for duct mounting; damper blades shall not
be less than 0.064-inchthick galvanized steel with maximum blade width of 8 inches and
length of 48 inches.
1. Secure blades to 1/2-inch-diameter, zinc-plated axles using zinc-plated hardware,
with oil impregnated sintered bronze blade bearings, blade-linkage hardware of
zinc-plated steel and brass, ends sealed against spring-stainless-steel blade
bearings, and thrust bearings at each end of every blade.
2. Operating Temperature Range: From minus 40 to plus 200 deg F.
3. Edge Seals, Low-Leakage Applications: Use inflatable blade edging or replaceable
rubber blade seals and spring-loaded stainless-steel side seals, rated for leakage
at less than 10 cfm per sq. ft. of damper area, at differential pressure of 4-inch
wg when damper is held by torque of 50 in. x lbf; when tested according to AMCA
500D.
4. Dampers shall be Ruskin CD-50 or approved equal.
2.6 CONTROL CABLE
A. Control cable shall be shielded.
B. Control wire penetrating a plenum shall be plenum rated with 25/50 smoke rating.
C. Control wiring ran through a vertical shaft more than 2 floors shall be installed in a
continuous raceway and a pull box at each floor.
PART 3 – EXECUTION
3.1 DELIVERY, STORAGE, AND HANDLING
A. Factory-Mounted Components: Where control devices specified in this Section are
indicated to be factory mounted on equipment in other Sections, arrange for shipping of
control devices to equipment manufacturer. Upon delivery the equipment manufacturer
shall inspect shipment for visual damages. The Controls Contractor shall replace any
damaged control equipment at no cost to the Owner.
B. Provide factory shipping containers for each piece of equipment. Provide factory applied
plastic end caps on each length of pipe and tube. Maintain cartons and end caps through
shipping, storage and handling as required to prevent equipment and pipe-end
damage, and to eliminate dirt and moisture from equipment and inside of pipe and tube.
Where possible store equipment and materials inside and protected from weather. When
necessary, to store outside, elevate well above grade and enclose with durable water-
proof wrapping.
3.2 EXAMINATION
A. Verify that power supply is available to all controllers, and electric actuators.
3.3 COORDINATION
A. Coordinate location of temperature sensors, humidistats, and other exposed control
sensors with plans and room finish details before installation.
B. Coordinate equipment with Division 28 Section "Fire Detection and Alarm" to achieve
compatibility with equipment that interfaces with that system.
C. Coordinate supply of conditioned electrical branch circuits for control units with Division
26 contractors. BAS contractor responsible for work associated with installation of power
supply from electrical panelboard to all powered controllers and devices.
D. Coordinate equipment with Division 26 Section "Panelboards" to achieve compatibility
with starter coils and annunciation devices.
E. Coordinate equipment with Division 26 Section "Motor-Control Centers" to achieve
compatibility with motor starters and annunciation devices.
3.4 INSTALLATION
A. Install software in control units. Implement all features of programs to specified
requirements and as appropriate to achieve sequence of operations.
B. Connect and configure equipment and software to achieve sequence of operation
specified.
C. Mount all wall thermostats, and other exposed control sensors on dedicated electrical
back boxes.
D. Install averaging elements in ducts and plenums in crossing or zigzag pattern.
E. Install automatic dampers according to Division 23 Section "Air Distribution".
F. Install damper motors on outside of duct in warm areas, not in locations exposed to
outdoor temperatures.
G. Install labels and nameplates to identify control components according to Division 23
Section "Identification for HVAC Piping and Equipment".
H. Install refrigerant instrument wells, valves, and other accessories according to Division 23
Section "Refrigerant Piping".
3.5 ELECTRICAL WIRING AND CONNECTION INSTALLATION
A. Install systems and materials in accordance with manufacturer's instructions, rough-in
drawings and equipment details. Install electrical components and use electrical products
complying with requirements of applicable Division 26, 27 & 28 Sections of these
Specifications except where specifically stated in this Section.
B. The term "control wiring" is defined to include providing of wire, conduit, and
miscellaneous material as required for mounting and connecting electric or electronic
control devices.
C. Install all control wiring in conduit for electric/electronic control systems. Conceal wiring,
except in mechanical rooms and areas where other conduit and piping are exposed. UL
plenum rated cable shall be allowed above accessible lift out ceilings, in air plenums and
in other areas as approved by Architect and local and NEC codes.
D. Stub conduit to above lift out ceilings. Plastic bushing shall be installed where the wiring
exits the conduit to prevent damage.
E. Properly support and run in a neat workmanlike manner all wiring and conduit. Run
parallel to or at a right angle to building structure.
F. Number-code or color-code conductors, excluding those used for individual zone
controls, appropriately for future identification and servicing of control system.
G. This section shall provide all line voltage power wiring required because of substitution
of equipment specified in this section.
H. Install raceways, boxes, and cabinets according to Division 26 Section "Raceway and
Boxes for Electrical Systems".
I. Install line voltage wiring in rigid conduit.
J. Install wire and cable according to Division 26 Section "Low-Voltage Electrical Power
Conductors and Cables".
K. Install signal and communication cable according to Division 27 Section "Communications
Horizontal Cabling".
1. Bundle and harness multi-conductor instrument cable in place of single cables
where several cables follow a common path.
2. Fasten flexible conductors, bridging cabinets and doors, along hinge side; protect
against abrasion. Tie and support conductors.
3. Number-code or color-code conductors for future identification and service of
control system, except local individual room control cables.
4. Install wire and cable with sufficient slack and flexible connections to allow for
vibration of piping and equipment.
L. Connect manual-reset limit controls independent of manual-control switch positions.
Automatic duct heater resets may be connected in interlock circuit of power controllers.
M. Connect hand-off-auto selector switches to override automatic interlock controls when
switch is in hand position.
N. Unless indicated otherwise, mount room sensors (i.e. thermostats and sensors for room
control) immediately inside of door adjacent to light switch.
1. Where a light switch is not located immediately inside of door, mount sensor
within room where it is best suited to sense true space conditions for proper
operation and controllability of equipment serving the room.
2. Unless indicated otherwise mount sensor at 48 IN above finished floor or as
indicated on the Drawings.
O. Identification:
1. Provide laminated plastic nameplates for control panels. Other equipment
devices furnished, including sensors, switches, valves, gages, actuators and all
other item furnished under this section shall be identified with plastic embossed
labels adhered to the device. Each nameplate shall identify the function, such as
"mixed air low limit" or "cold deck temperature sensor" Laminated plastic shall
be one-eighth inch thick whiter with black center core. Nameplates shall be a
minimum of 1 inch by 3 inches with minimum one quarter inch high engraved
block lettering. Nameplates for devices smaller than 1 inch by 3 inches shall be
attached by a nonferrous metal chain. Submit a schedule of proposed wording of
each nameplate with hardware submittal.
2. Instrumentation and Control Diagrams: Provide framed drawings including the
sequence of controls and verbal description in laminated plastic showing
complete diagrams for all equipment furnished and interfaces to all existing
equipment, at each respective equipment location. Condensed operating
instructions explaining preventive maintenance procedures methods of checking
the system for normal safe operation and procedures for safely starting and
stopping the system manually shall be prepared in typed form, framed as
specified for the diagrams and posted beside the diagrams. Proposed diagrams,
instructions and other sheets shall be submitted prior to posting.
3.6 FIELD QUALITY CONTROL
A. Manufacturer's Field Service: Engage a factory-authorized service representative to
inspect field- assembled components and equipment installation, including connections.
Report results in writing.
B. Perform the following field tests and inspections and prepare test reports:
1. Operational Test: After electrical circuitry has been energized, start units to
confirm proper unit operation. Remove and replace malfunctioning units and
retest.
2. Test and adjust controls and safeties.
3. Test each point through its full operating range to verify that safety and operating
control set points are as required.
4. Test each control loop to verify stable mode of operation and compliance with
sequence of operation. Adjust PID actions.
5. Test each system for compliance with sequence of operation.
6. Test software and hardware interlocks.
C. Controls Verification:
1. Verify that instruments are installed before calibration, testing, and loop checks.
2. Check instruments for proper location and accessibility.
3. Check instrument installation for direction of flow, elevation, orientation,
insertion depth, and other applicable considerations.
4. Check flow instruments. Inspect tag number and line and bore size and verify that
inlet side is identified and that meters are installed correctly.
5. Check pressure instruments, piping slope, installation of valve manifold, and self-
contained pressure regulators.
6. Check temperature instruments and material and length of sensing elements.
7. Check dampers. Verify that proper blade alignment, either parallel or opposed,
has been provided.
8. Check control system as follows:
a. Verify that controller power supply is from emergency power supply, if
applicable.
b. Verify that wires at control panels are tagged with their service
designation and approved tagging system.
c. Verify that spare I/O capacity has been provided.
d. Verify that controllers are protected from power supply surges.
D. Replace damaged or malfunctioning controls and equipment and repeat testing
procedures.
3.7 ADJUSTING
A. Calibrating and Adjusting:
1. Calibrate instruments.
2. Make three-point calibration test for both linearity and accuracy for each analog
instrument.
3. Calibrate equipment and procedures using manufacturer's written
recommendations and instruction manuals. Use test equipment with accuracy at
least double that of instrument being calibrated.
4. Control System Inputs and Outputs:
a. Check digital inputs using jumper wire.
b. Check digital outputs using ohmmeter to test for contact making or
breaking.
c. Check resistance temperature inputs at 0, 50, and 100 percent of span
using a precision-resistant source.
5. Flow:
a. Set differential pressure flow transmitters for 0 and 100 percent values
with 3- point calibration accomplished at 50, 90, and 100 percent of span.
b. Manually operate flow switches to verify that they make or break
contact.
6. Pressure:
a. Calibrate pressure transmitters at 0, 50, and 100 percent of span.
b. Calibrate pressure switches to make or break contacts, with adjustable
differential set at minimum.
7. Temperature:
a. Calibrate resistance temperature transmitters at 0, 50, and 100 percent
of span using a precision-resistance source.
b. Calibrate temperature switches to make or break contacts.
8. Stroke and adjust control valves and dampers without positioners, following the
manufacturer's recommended procedure, so that valve or damper is 100 percent
open and closed.
9. Provide diagnostic and test instruments for calibration and adjustment of system.
10. Provide written description of procedures and equipment for calibrating each
type of instrument. Submit procedures review and approval before initiating
startup procedures.
B. Adjust initial temperature and humidity set points.
3.8 DEMONSTRATION & TRAINING
A. Engage a factory authorized service representative to train Owner's maintenance
personnel to adjust, operate, and maintain HVAC instrumentation and controls. Refer to
Division 01 Section “Demonstration and Training.”
B. Upon system acceptance provide a minimum of five (5), six (6) hour general classroom
training sessions for three (3) of the Owner’s personnel in the operation, programming,
troubleshooting and maintenance of the control system. Training sessions shall be
videotaped by the BAS contractor and tapes/digital files turned over to the Owner at
completion of training along with a log book to document follow training issues.
1. Training to occur at manufacturer’s local training facility.
2. Travel, room and board at Owner’s expense.
3. Class size to be limited to five (5) operators at a time.
C. Over the first twelve months of operation after Substantial Completion provide two (2),
six (6) hour follow up training sessions at the Owner’s discretion.
END OF SECTION