23 36 00 Air Terminal Devices.pdf

2022017 MEADOW UNIT RENOVATION 04.17.2024

OREGON STATE HOSPITAL

ADDENDUM #01

23 3600 - 1 AIR TERMINAL DEVICES

SECTION 23 36 00

AIR TERMINAL DEVICES

PART 1 - GENERAL

MECHANICAL SUPPORTING DEVICESGENERAL

1.1 RELATED WORK

A. Section 238214 - Heating and Cooling Terminal Devices.

B. Section 233114 - Ductwork (Support).

C. Section 23314 - Ductwork Specialties (Access Doors).

D. Section 230993 - Control Sequences.

1.2 REFERENCE

A. Work under this Section is subject to requirements of the Contract Documents including the General Conditions, Supplementary Conditions, and sections under Division 1 General Requirements.

1.3 SUBMITTALS

A. Shop Drawings including, but not limited to, the following:

1. Manufacturer's name and model number.

2. Identification as referenced in the documents.

3. Capacities/ratings.

4. Materials of construction.

5. Sound rating data.

6. Dimensions.

7. All other appropriate data.

1.4 DESIGN CRITERIA

A. Where any of air terminal devices are indicated on drawings to control space conditions in conjunction with reheat coil, that reheat coil may be furnished as integral part of or standard accessory to devices specified below. See related work above.

B. When air terminal devices are furnished with reheat coils, either integrally or remotely mounted, control panels of terminal devices shall be mounted on the same side of air terminal device as reheat coil piping connection.

23 3600 - 2 AIR TERMINAL DEVICES

C. Unless otherwise stated, units shall be system pressure independent and maintain air volume within ± 5% of required airflow regardless of system air pressure. Inlet velocity pressure sensor shall be multi-point center averaging type and be capable of amplifying pressure signals.

D. Unless otherwise stated, unit casings shall be constructed of galvanized steel or aluminum meeting SMACNA or ASHRAE Standards, but not lighter than 22 gauge.

E. Joints and seams of air terminal devices shall be sealed with appropriate sealant to minimize casing air leakage. Seal joints and seams not factory sealed in field as specified in Part 3.

F. Unit performance shall be certified in accordance with ARI Standard 880 including sound rating data certified for both casing discharge and radiated sound levels from 125 through 4000 Hz.

G. Supply air units shall be capable of operating from minimum inlet static pressure scheduled to

3" WG.

H. Provide supply air units with internal thermal insulation faced with minimum 0.001" thick aluminum foil. Insulation shall be compressed glass fiber with minimum 3/4" thick, 4 lb/ft3 density with R-value of 3.5. Insulation and facing shall meet requirements of UL 181 (Air Erosion, Mold growth and Humidity), and NFPA 90A (Flame 25/Smoke 50) and ASTM C665 (Fungi Resistance). Secure liner with full-seam-length, galvanized steel angles or Z-strips, which enclose and seal all edges. Tape or adhesive will not be acceptable. Liner assembly shall be similar to Titus Steri-Loc.

I. Supply air units shall be lined with engineered polymer foam insulation, minimum 3/8" thick, 1.5 lb/ft3 density and thermal conductivity not more than 0.25 at 75°F. Insulation shall meet requirements of UL 181 (Air Erision, Mold growth and Humidity), NFPA 90A (Flame 25/Smoke

50) and ASTM C665 (Fungi Resistance).

J. Sound attenuators, where specified or required to meet sound performance specified for air terminal devices, shall be constructed of all metal or sound attenuating fiber material with erosion protection liner as required to meet sound requirement specified. Refer to Part 2Section 15860 - Ductwork Specialties, for sound attenuators and erosion protection.

K. Unit manufacturer or manufacturer's designated representative will be required to verify air terminal device performance and adjust or replace device within warranty period when it is determined that problem exists in area served by device.

L. Room sound levels due to discharge and/or casing radiation from units when operating from minimum pressure scheduled to 2" WG inlet static pressure shall not exceed noise criteria (NC) values in any spaces as indicated below. If units exceed sound level specified, provide terminal sound attenuators to comply with the noise criteria stated below. Refer to Part 2Section 15860 - Ductwork Specialties, for sound attenuating devices.

Type of Room Noise Criteria (NC)

Patient Rooms 35

Patient Toilet Rooms 40

Exam Rooms 35

Open Offices/Workstations 35

Private Offices 33

Private Offices w/Privacy Concerns 33

Conference Rooms 30

23 3600 - 3 AIR TERMINAL DEVICES

Type of Room Noise Criteria (NC)

Interview Rooms 33

Group Rooms (Small & Large) 33

Quite Room 33

Treatment Planning 33

Refusal Room 33

Sensory Room 20

Seclusion Room 33

ANTE Room 33

Meds Room 30

Charting Area 38

Nurse Station 33

Labs 40

Circulation 38

Check in/Waiting 33

Living Room/Activity Room 40

Radiology 38

Staff Lounge 33

Spiritual Center 25

Relaxation Room 30

Music Room 33

Game Room 33

Museum Rooms 30

Classrooms 33

Fitness Rooms 38

Dining Areas 38

Servery Areas 38

1.5 CONTROLS COORDINATION

A. Unit manufacturer shall provide unit inlet flow sensor and control enclosure for Control Contractor's use.

B. Control Contractor shall furnish all actuators, linkages if required, differential pressure transmitters, controllers and any other devices required for unit control that are not provided by unit manufacturer for unit manufacturer's factory mounting. Unit manufacturer and Control Contractor shall coordinate for proper factory installation.

C. Unit manufacturer shall factory install devices furnished by Control Contractor to result in complete functioning unit. Unit manufacturer shall be responsible for reviewing compatibility of devices furnished by Control Contractor with units being provided.

D. Unit manufacturer shall perform preliminary calibration based on scheduled airflow rates.

23 3600 - 4 AIR TERMINAL DEVICES

E. Control Contractor's field mounting will be acceptable, provided Control Contractor coordinates proper installation with unit manufacturer. Control Contractor shall be responsible for complete functioning unit.

PART 2 - PRODUCTS

2.1 VARIABLE VOLUME AIR TERMINAL DEVICES

A. Manufacturers: E. H. Price Model SDV, Titus, Krueger, Enviro-Tec (ETI), Nailer, Carnes, Tuttle and Bailey or JCI.

B. Units shall be suitable for 24 volt electric control system. Control Contractor shall be responsible for wiring from control panels to each terminal unit.

C. Units shall be capable of modulating to full closed position with maximum leakage of 1%.

D. Furnish units with reheat coils having capacities as indicated in schedules.

E. Provide access doors for all air terminal devices with reheat coils at inlet side of coils. Refer to Section 23 3314 - Ductwork Specialties, for access doors. Unit manufacturer's standard access doors are acceptable, provided that access doors are appropriately sized and internally lined with same materials as unit casing. If access doors are provided in separate sections as extension of units, these sections shall be internally lined in same manner as units.

F. Provide access doors for all boxes with reheat coils at inlet side of coils. Reheat coils shall be shipped loose and field mounted. Provide sheet metal connecting section between units and reheat coils for mounting access doors. Refer to Section 23 3314 - Ductwork Specialties, for access doors.

G. Provide manufacture’s integral 3ft packless discharge attenuator and ¾” fiber-free liner.

2.2 RETURN OR EXHAUST AIR TERMINAL DEVICES (VALVES)

A. Manufacturers: E.H. Price Model RDV, Titus, Krueger, Enviro-Tec (ETI), Nailer, Carnes, Tuttle and Bailey or JCI.

B. Units shall be suitable for 24 volt electric control system. Control Contractor shall be responsible for wiring from control panels to each terminal unit. Units shall be similar to Titus Model ECV.

C. Units shall be capable of modulating to full closed position with maximum leakage of 1%.

D. Unit casing shall be minimum 22 gauge galvanized steel unless otherwise specified.

E. Casing leakage shall not exceed 3 cfm for inlet sizes 8 and smaller and 5 cfm for inlet sizes 9 and larger at 1.5" WG differential static pressure.

F. Damper shall be heavy gauge steel. Shaft shall be steel with bronze iolite self-lubricating bearings. Damper shall incorporate mechanical stop to prevent overstroking and synthetic seal to limit close-off leakage to 4 cfm at 1.5" WG differential pressure.

23 3600 - 5 AIR TERMINAL DEVICES

G. Unit casing, damper and shaft for fume hood exhaust shall be stainless steel.

H. Unit shall incorporate multi-point, center averaging velocity sensor. Sensor shall provide signal measurable by controller at inlet velocities of 500 fpm. Sensor shall provide control signal accuracy of ±5%, with the same size inlet duct at any inlet condition.

I. Provide manufacture’s integral 3ft packless inlet attenuator and ¾” fiber-free liner.

PART 3 - EXECUTION

3.1 INSTALLATION

A. Install units as shown on drawings and according to manufacturer's instructions.

B. Terminal units installed above ceiling or other restricted access space shall be installed in a manner that permits servicing of air terminal components (such as, controller, reheat valve, damper actuator, velocity sensor, isolation valve) from a single ladder location.

C. Zone reheat valve actuators, controllers, and other serviceable devices shall be installed in a position that permits visual inspection of all wiring terminations and moving parts from a ladder without the use of a mirror. Valve actuators may not be installed in the 6 o'clock position on the valve.

D. Manufacturer's nameplates, flow/pressure profiles, and other labels shall not be obscured by installation of panels, piping, actuators etc.

E. Seal joints and seams of units not factory sealed to meet allowable leakage rate specified for low pressure ductwork.

F. Connect terminal devices to ductwork with removable type joints.

G. Provide minimum length of 3 times box inlet diameter of straight rigid duct at box inlet.

H. Provide access doors for terminal devices with reheat coils at inlet side of coils.

I. Provide access panels compatible with ceiling for all units located above non-accessible ceilings.

END OF SECTION 23 36 00