Tricoil Product Specifications

GENERAL FEATURES

These are some general paragraphs that are use to clarify and supplement the TRICOIL® specifications.

ENHANCED HUMIDITY CONTROL SYSTEM

Where specified or where indicated on the drawings, provide an enhanced humidity control system as described herein. The base bid system shall be the patented TRICOIL® method of air conditioning for enhanced temperature and humidity control. The TRICOIL® components shall be furnished as a coordinated package by the air handling unit manufacturer. Contact Sensible Equipment Company, P.O. Box 669, Goldenrod, Florida 32733, telephone number (407) 296 - 8068, Fax Number (407) 296 - 7420.

Alternates to the base bid are encouraged. The contractor may furnish, with the engineers approval, a deductive alternate to the base bid to use other equipment or methods that provides performance as scheduled. Alternate bids must be submitted in writing with complete engineering analysis including equipment performance data, psychrometric analysis with chart, flow diagrams, equipment specifications, manufacturer's descriptive literature, reduction in bid amount, and other information required by the engineer to analyze the proposed alternate. The alternate must include any and all costs for the work of other trades required to provide complete and operational equivalent systems. The contractor shall assume single source responsibility for all the subsystems that he chooses to integrate and submit for his alternate bid. All responsibilities for equivalencies for the performance of the alternate system or method to the base bid system or method plus the coordinated supporting central plant utilities (electrical and/or mechanical) plant shall constitute a required single source responsibility and shall be so acknowledged by the contractor with the alternate proposal.

The air handling units shall have the following features:

TRICOIL® method of enhanced humidity control having capacities as indicated or scheduled with components as specified and/or indicated on the drawings.
Primary cooling coil shall be chilled water or direct expansion cooling as specified.
A recuperative precooling/reheat system shall be provided that shall exchange energy from the mixed outside air and return air stream (or the 100% outside air stream as applicable) to the supply air stream for simultaneous precooling and reheating. The base bid system shall use a hydronic piping loop and circulating pump. Alternate systems may use a desiccant heat exchanger, heat pipe loop, or an air to air heat exchanger. Space shall be provided between each coil and heat exchange surface for cleaning. A method of controlling the amount of energy exchange from 0% to 100% of rated capacity between the reheat and precooling elements shall be provided for part load performance.
Supplemental reheat: The base bid TRICOIL® method shall use the hydronic reheat coil to provide the supplemental reheat energy to the supply air stream. The supplemental reheat energy shall be from the hot water source as indicated on the drawings.
Preheat: The base bid TRICOIL® method shall use the precooling coil to provide the preheat function to provide preheat energy for freeze protection and heating duty as required. The heating energy shall be from the hot water source as indicated on the drawings.
Coordinate access door locations with the air handling unit manufacturer. Access space must be provided between each coil for servicing and cleaning purposes. Provide service doors in access sections.

TRICOIL® METHOD KITS FOR FIELD ASSEMBLY

The TRICOIL® method is a recuperative wrap around type system providing simultaneous precooling and reheat for temperature and humidity control. The TRICOIL® method shall also provide heating and supplemental reheat control where indicated. The TRICOIL® method Kits include components which shall be field assembled and wired by the installing contractor. The TRICOIL® method Kits shall consist generally of the following components:

Site specific license for the specified TRICOIL® system with capacity as scheduled or as indicated.
Pump and motor, pump motor starter for three phase motors and pump control relay for single phase motors.
TRICOIL® loop control valves with actuators. Quantity, and type of valves and actuators shall be as required to match the operating sequence and as indicated on the drawings. (Chilled Water Control Valve is not included with the TRICOIL® components and shall be provided by the temperature control contractor).
TRICOIL® loop water balancing valve shall be a circuit setter type or flow control type as indicated. The heating hot water flow control valve, where indicated, shall be an automatic flow control type.

TRICOIL® METHOD PUMP/VALVE ASSEMBLIES

The TRICOIL® method is a recuperative wrap around type system providing simultaneous precooling and reheat for temperature and humidity control. The TRICOIL® method shall also provide heating and supplemental reheat control where indicated. The TRICOIL® method components shall be provided for field installation and wiring by the installing contractor. The TRICOIL® method components shall consist generally of the following:

Site specific license for the specified TRICOIL® system with capacity as scheduled or as indicated.
Pump and Valve Assemblies complete with pump and motor, pump motor starter, differential pressure switch, control valve(s), balancing valve(s), and piping with drain and vent. Components shall be factory assembled in an insulated enclosure with a drain pan. Pump motor, starter, control valve(s), pressure switch, pump status light, and hand/off/auto switch shall be factory wired to a numbered terminal strip ready for connection to the electrical power supply and to the temperature control system.
TRICOIL® loop control valves with actuators. Quantity, and type of valves and actuators shall be as required to match the operating sequence and as indicated on the drawings.
TRICOIL® loop water balancing valve shall be a circuit setter type and heating hot water flow control valve, where indicated, shall be an automatic flow control type.

PUMPS FOR KITS AND ASSEMBLIES

The pump shall be an In-line type or In-line Booster type as scheduled or other approved. Pump characteristics shall be as scheduled on the drawings.

· In-line Pumps shall be Bell and Gossett Series 80 or other approved. Pumps shall be suitable for vertical or horizontal installation. Pumps shall be close coupled, single stage design and shall be capable of being serviced without disturbing the piping. Pump casing shall be Class 30 cast Iron. Impeller shall be cast bronze, enclosed type and shall be dynamically balanced. Pumps shall be rated for 175 psig working pressure. Pumps shall have gauge tappings at the suction and discharge nozzles and shall include vent and drain proof ports. Motors shall be Totally Enclosed, and shall meet NEMA specifications. The motors shall be non-overloading at any point on the pump's performance curve. Pumps shall be factory tested. Pumps shall be factory painted with high-grade machinery enamel paint.
· Inline Booster Pumps shall be Bell and Gossett Series PL or other approved. Pumps shall be of the horizontal, permanently lubricated type with steel shaft, ball bearings, and water tight seals. Pump body shall be cast iron or bronze, face plate shall be stainless steel. Impeller shall be non-metallic. Mechanical seal faces shall be carbon on silicon carbide. The motor shall be non-overloading at any point on the pump performance curve. The pump motor shall be open drip proof, sealed ball bearing, quiet operating construction the motors shall be split capacitor type with thermal overload protection. Pumps shall be suitable for operation at 225 degrees F at 150 psig working pressure.
· The pump shall be a Taco Cartridge Circulator pump or other approved and shall have a bronze casing, a non-metallic impeller, a ceramic shaft, flanged connections, permanent split capacitor motor with overload protection. Pump and motor shall be selected for non-overloading operation. Pump characteristics shall be as scheduled on the drawings.

VALVES FOR KITS AND ASSEMBLIES

The valves used in the TRICOIL® system shall be of the type as scheduled or other approved. Characteristics shall be as scheduled on the drawings.

Control valves (Plan Mark CV) shall be three port ball valves as indicated on the drawings. Valves shall have bronze bodies with female NPT threads. Valves shall have blowout proof stem design, glass reinforced Teflon thrust seal washer and stuffing box ring with minimum 400 psi rating. Stem packing screw shall be adjustable for wear. Valve ball shall be chromium plated bronze and shall be rated at a minimum of 400 psi WOG, cold, non-shock service. All valves shall be provided with reinforced Teflon seats.
Control valve actuators shall be fully modulating or two position as indicated in the control sequence. Modulating valves shall be positive positioning, responding to a 2-10 VDC or a 4-20 mA signal (with the addition of a 500 ohm resistor). There shall be a visual valve position indicator and an actuator generated 2-10 VDC valve position output signal for electronic feed back to the control system. Valve power required shall be 24 VAC and power consumption shall not exceed 8 watts at 24 VAC. The actuator shall provide minimum torque required for proper valve close-off. The actuator shall be designed for use with current limiting motor overload protection or shall have adjustable single pole double throw travel stop limit switches. A release button or handle on the motor shall be provided to allow for manual override, except when using spring return valves. All valves shall be UL listed.
Balancing Valve, (Plan Mark BV) shall be a circuit setter type balancing valve as made by Taco or other approved. The valve shall be bronze body through 2 inch diameter, all brass interior parts, sweat or NPT pipe connections, schrader style pressure ports for attachment to a differential pressure gauge, (gauge not included), drain port, blow-out proof stem, calibrated nameplate with tamper resistant memory stop, and o-ring seal. Valves through 2 inch diameter shall be rated to 300 PSI, 250 degrees F.
Flow Control Valve (Plan Mark FCV) shall be a Griswold Miniature style flow control valve or other approved capable of controlling flow to within +/- 5% accuracy through the specified pressure differential range of the valve. Valve body shall be ductile iron body through 1.5 inch diameter and flow rates from 0.33 to 34 GPM and shall have female NPT end connections, stainless steel flow control assembly, dual 1/4 inch pressure/temperature test valves for measuring pressure or temperature in the system (gauges not included), shall be permanently marked to show direction of flow, model number and differential pressure control range.