Titus Digital Single Duct Terminal

Single Duct terminals are the fundamental building blocks for Variable Air Volume (VAV) systems. Their primary function is to regulate airflow to a zone, in response to zone temperature requirements. The Titus ESV is unique as it incorporates many design features that increase performance, decrease service and installation costs, and offer increased value, over and above this basic function.

Features:

• Assured of accurate, AHRI Certified Performance ratings
• Compact size and easy access for service saves time and expense in installation
• Rectangular discharge opening is designed for slip and drive cleat duct connection
• Inlet sizes: 4”, 5”, 6”, 7”

Suggested Specifications
Single/Dual Duct Terminal Units

Models:
ESV - Basic Unit

ESV Basic Unit
See Section S for control specifications.
1.Furnish and install TITUS Model (P)(A)(D) ESV single duct, variable air volume terminals of the sizes and capacities shown in the plans.

2.Terminals shall be certified under the ARI Standard 880 Certification Program and carry the ARI Seal. Noncertified terminals may be submitted after testing at an independent testing laboratory under conditions selected by the engineering consultant in full compliance with ARI Standard 880. These tests must be witnessed by the engineering consultant with all costs to be borne by the terminal manufacturer. Testing does not ensure acceptance.

3.The terminal casing shall be minimum 22-gauge galvanized steel, internally lined with ½-inch dual density insulation which complies with UL 181 and NFPA 90A. All exposed insulation edges shall be coated with NFPA 90A approved sealant to prevent entrainment of fibers in the airstream. The discharge connection shall be slip and drive construction for attachment to metal ductwork. The casing shall be constructed to hold leakage to the maximum values shown in the Casing Leakage table.

4.The damper shall be heavy gauge steel with shaft rotating in Delrin® self-lubricating bearings. Nylon bearings are not acceptable. Shaft shall be clearly marked on the end to indicate damper position. Stickers or other removable markings are not acceptable. The damper shall incorporate a mechanical stop to prevent overstroking and a synthetic seal to limit close-off leakage to the maximum values shown in the Damper Leakage table.

5.Actuators shall be capable of supplying at least 35-inch lbs. of torque to the damper shaft and shall be mounted externally for service access. Terminals with internal actuator mounting or linkage connection must include gasketed access panel, removable without disturbing ductwork. Casing with access panel shall be constructed to hold leakage to the maximum values shown in the Casing Leakage table.



6.At an inlet velocity of 2000 fpm, the minumum static pressure required to operate any terminal size shall not exceed 0.13-inch wg for the basic terminal.

7.Sound ratings for the terminal shall not exceed ____ NC at ____ static pressure. Sound performance shall be ARI certified.

Accessories
Hot Water Reheat Coils
1.Hot water reheat coils shall be enclosed in a minimum 20-gauge galvanized steel casing with slip and drive construction for attachment to metal ductwork. Coils shall be factory installed on the terminal discharge. Fins shall be rippled and corrugated heavy gauge aluminum, mechanically bonded to tubes. Tubes shall be copper with minimum wall thickness of 0.016-inch with male solder header connections. Coils shall be leak tested to 300 psi with minimum burst pressure of 1800 psi at ambient temperature. Number of coil rows and circuits shall be selected to provide performance as required per 
the plans. Coil performance data shall be based on tests run in accordance with ARI 
Standard 410.

Electric Reheat Coils
(Available on pressure independent terminals only)
1.Electric coils shall be supplied and installed on the terminal by the terminal manufacturer. Coils shall be ETL listed. Coils shall be housed in an attenuator section integral with the terminal with element grid recessed from unit discharge a minimum of 5 inches to prevent damage to elements during shipping and installation. Elements shall be 80/20 nickel chrome, supported by ceramic isolators a maximum of 3.5 inches apart, staggered for maximum thermal transfer and element life and balanced to ensure equal output per step. The integral control panel shall be housed in a NEMA 1 enclosure with hinged access door for access to all controls and safety devices.

2.Electric coils shall contain a primary automatic reset thermal cutout, a secondary manual reset thermal cutout, differential pressure airflow switch for proof of flow, and line terminal block. Unit shall include an optional integral door interlock type disconnect switch that will not allow the access door to be opened while power is on. Non-interlocking type disconnects are not acceptable. All individual components shall be UL listed 
or recognized.

3.(Optional) Electric coils shall include line fusing, mercury contactors mounted and wired within the control enclosure.

Optional Lynergy Electric Heat
1.Proportional electric coils shall be supplied and installed on the terminal by the terminal manufacturer. Coils shall be ETL listed. Coils shall be housed in an attenuator section integral with the terminal with element grid recessed from unit discharge a minimum of 5 inches to prevent damage to elements during shipping and installation. Elements shall be 80/20 nickel chrome, supported by ceramic isolators a maximum of 3½ inches apart, staggered for maximum thermal transfer and element life, and balanced to ensure equal output per step. The integral control panel shall be housed in a NEMA 1 enclosure with hinged access door for access to all controls and 
safety devices.

2.Electric coils shall contain a primary automatic reset thermal cutout, a secondary replaceable heat limiter per element, differential pressure airflow switch for proof of flow, and line terminal block. Coil shall include an integral door interlock type disconnect switch, which will not allow the access door to be opened while power is on. Non-interlocking type disconnects are not acceptable. All individual components shall be UL listed or recognized.

3.Heaters shall be equipped with a Lynergy Comfort Controller to control heater coil firing. The control panel shall include an interface to control heater coil firing in proportion to the ATC signal.  The ATC signal shall connect to low voltage universal signal interface circuitry supplied and installed by the terminal manufacturer.  The universal interface shall allow at least the following seven interface options without additional interface circuitry.  

ATC equipment providers with 0-20mA or 4-20mA signals shall supply and install a suitable dropping resistor to convert the current signal to a 0-10VDC signal or 2-10VDC signals:
 •PWM heat
 •2 stage heat
 •0-10V / 0-20mA
 •2-10V /4-20mA
 •Incremental T-stat
 •Binary
 •3 point floating

4.A downstream air temperature limit and control shall be automatically invoked by adding a downstream air temperature sensor.  When invoked, the downstream air from the heater shall not exceed an adjustable maximum temperature set point.  When the ATC’s call for heat is less than 100%, the heater shall control the downstream air temperature to a point in proportion to the span between the heater’s probable entering air temperature and the maximum air temperature set point.

Optional Standard SCR Electric Heat
1.Proportional, modulating electric coils shall be supplied and installed on the terminal by the terminal manufacturer. Coils shall be ETL listed. Coils shall be housed in an attenuator section integral with the terminal with element grid recessed from unit discharge a minimum of 5 inches to prevent damage to elements during shipping and installation. Elements shall be 80/20 nickel chrome, supported by ceramic isolators a maximum of 3.5 inches apart, staggered for maximum thermal transfer and element life, and balanced to ensure equal output per step. The integral control panel shall be housed in a NEMA 1 enclosure with hinged access door for access to all controls and 
safety devices.

2.Electric coils shall contain a primary automatic reset thermal cutout, a secondary manual reset thermal cutout, proportional electronic airflow sensor for proof of flow, and line terminal block. 


The proportional electronic airflow sensor shall be totally independent of the duct static pressure and shall adjust the heater capacity according to the available airflow. The heaters shall deliver maximum heating when needed with normal minimum airflow, reduce heating with lower than minimum airflow and stop heating with no airflow. Unit shall include an integral door interlock type disconnect switch which will not allow the access door to be opened while power is on. Non-interlocking type disconnects are not acceptable. All individual components shall be UL listed or recognized.

3.Heaters shall be equipped with a proportional SCR controller to modulate the heater load according to the temperature control signal. The electronic controller shall be compatible with the following 
input signals:

• Variable voltage signal 0-10 VDC
• Pulse width modulation AC or DC

Fibre-Free Liner
(Substitute the following paragraph 3 for paragraph 3 in the ESV Basic Unit Specification.)
3.The terminal casing shall be minimum 22-gauge galvanized steel, internally lined with engineered polymer foam insulation which complies to UL181 and NFPA 90A. Insulation shall be 1½ pound density, closed cell foam. Exposed fiberglass is not acceptable. The insulation shall be mechanically fastened to the unit casing. The casing shall be constructed to hold leakage to the maximum values shown in the Casing Leakage table.

Steri-Loc Liner
(Substitute the following paragraph 3  for paragraph 3 in the ESV Basic Unit Specification.)
3.The terminal casing shall be minimum 22-gauge galvanized steel, internally lined with a non-porous, sealed liner which complies with UL 181 and NFPA 90A. Insulation shall be 4 lb. density. All cut edges must be sealed from the airstream using mechanically bonded metal barrier strips. Liners made of Mylar, Tedlar, Silane or woven fiberglass cloth are not acceptable. Insulation shall be equivalent to TITUS Steri-Loc or double wall lining is acceptable. The casing shall be constructed to hold leakage to the maximum values shown in the Casing Leakage table.

UltraLoc Liner
(Substitute the following paragraph 3  for paragraph 3 in the ESV Basic Unit Specification.)
3.The terminal casing shall be minimum 22-gauge galvanized steel. The units shall be lined with 1-inch thick matte faced insulation,  meeting UL 181 and NFPA 90A, enclosed between the unit casing and a non-perforated internal 
22-gauge sheet metal cover extending over the fiberglass insulation, as well as covering the liner cut edges. The discharge connection shall be slip and drive construction for attachment to metal ductwork. The casing shall be constructed to hold leakage to the maximum values shown in the Casing Leakage table.