U.S. Department of Transportation Federal Transit Administration – NIST MEP Supplier Scouting
DOT FTA ITEM OPPORTUNITY SYNOPSIS: ITEM # 2015-1
TECHNICAL INFORMATION
Item Designation/Description:
Variable Refrigerant Flow (VRF) Mechanical System
Item Application:
This is the mechanical system that will be installed in the
Vehicle Maintenance Facility (VMF) associated with the
Kansas City Downtown Streetcar Project in Kansas City, MO,
which is receiving funding from a U.S. DOT FTA TIGER grant.
Item Materials:
• The VRF system that has been specified for use in the VMF
consists of packaged, air-cooled refrigerant compressor and
condenser units, as well as fan coil units.
• The VRF outdoor condensing units are equipped with
multiple circuit boards, and they include cabinets fabricated
of galvanized steel, bonderized and finished. R410A refrigerant is used in the units, as well as Polyolester (POE) oil.
The outdoor coil shall be of nonferrous construction with lanced or corrugated plate fins on copper tubing.
• The units will include Branch CIRCUIT (BC) controllers in cabinet housings that are fabricated of galvanized steel or
factory standard baked enamel finish. Each cabinet houses a liquid-gas separator and multiple refrigeration
control valves, and the unit houses tube-in-tube heat exchangers.
• The condenser coil is a seamless copper-tube, aluminum-fin coil. Unit casings are steel, galvanized or zinc coated,
for exposed casing surfaces, treated and finished with manufacturer's standard paint coating.
• The fan coil units include outdoor units, BC (Branch Circuit) Controllers, multiple indoor units, and BACNET based
Direct Digital Controls. The indoor coil is of nonferrous construction with smooth plate fins on copper tubing.
• Return air is filtered by means of a long-life washable filter. Control boards include contacts for control of external
heat source.
Item Size:
• The VRF system will serve as the main heating, ventilating, and air conditioning (HVAC) system for spaces
encompassing 23,023 square feet on two immediately adjacent and connecting levels of a VMF being constructed
in conjunction with the Kansas City Downtown Streetcar Project.
• Detailed component sizes and capacities are included in the attached technical specifications.
Notable Performance Requirements:
• The VRF system being sought is a simultaneous cooling and heating system, and is the domestic equivalent to a
foreign made unit from Mitsubishi Electric.
• The equivalent foreign system that has been specified for the subject application is the Mitsubishi Electric City
Multi VRF R2 Series outdoor unit, combined with ceiling cassette and ceiling concealed indoor units. The product
brochure for these system is available at
http://www.mitsubishi-electric.co.nz/materials/citymulti/brochures/2014_citymulti_catalogue_CM13WD_K.pdf
• According to code in Kansas City, the VMF must meet LEED Gold criteria. As such, the VRF system being sought
must meet the criteria for efficient energy under LEED Gold criteria, targeting energy performance for air
conditioned spaces that is 40% more efficient that ASHRAE 90.1 2007.
• The VRF system being sought uses an inverter variable frequency drive compressor that is designed to maximize
energy efficiency, comfort conditioning of occupied spaces, long life, and reliable every day, 24/7 operation.
Opportunity Synopsis Posted by NIST MEP
on MEP Connect: Feb 19, 2015
MEP Center responses due to NIST MEP
via MEP Connect: Mar 6, 2015
U.S. Department of Transportation Federal Transit Administration – NIST MEP Supplier Scouting
Summary of Technical Specifications/Data:
• A detailed list of technical specifications for the VRF System being sought is attached to this Item Opportunity
Synopsis.
• The VRF system being sought shall include the following components:
o 1 air source outdoor unit
o 5 four-way ceiling-recessed cassette indoor units
o 1 one-way ceiling-recessed cassette indoor unit
o 7 high-performance, ceiling-concealed, ducted indoor units
o 1 16-branch circuit controller
o 13 wireless remote controllers and 13 wireless receivers
o 1 touch screen and web-based centralized controller
o 1 BACNET hardware interface
o 1 1,000 foot amount of 16 AWG control wire
o 13 condensate pumps
o 7 filter boxes with minimum efficiency reporting value (MERV) 13 filters
o 65 feet of ¼” x ½”, ½” insulation
o 65 feet of 3/8” x 5/8”, ½” insulation
BUSINESS INFORMATION
Relevant Procurement Information:
• This supply opportunity represents an immediate need for this Kansas City Downtown Streetcar Project.
• While no specific cost targets for the VRF system being sought have been provided, it has been communicated to
DOT FTA that installation of an alternative mechanical system to the VMF – a Variable Air Volume system – would
cost $108,720 more than the VRF. Also, construction costs for the VMF are approximately $10,377,000 of the
total project cost of $100,030,200.
• It is not anticipated that additional VRF systems will be needed or procured in conjunction with this Kansas City
Streetcar Project. It is, however, possible that production requirements will exist over the duration of the life of
the VMF, for the VRF system being sought in conjunction with ongoing repair and maintenance of the VMF.
• Domestic manufacturers of VRF systems have also been, or are also being, sought in conjunction with multiple
projects funded by multiple federal agencies in conjunction with various applications, including the U.S. DOT FTA
and FRA (Federal Railroad Administration), and U.S. Department of Energy.
Other Relevant Business Notes:
• Currently, domestic manufacturers (e.g., Trane, Carrier, York, others) are teaming up with foreign (Japanese and
Korean) manufacturers, such as Mitsubishi Electric, who have developed the VRF technology, to produce VRF
systems for the U.S. market. However, it has been reported to the DOT FTA that U.S. manufacturers are not
manufacturing the components of the VRF domestically.
• This MEP Supplier Scouting instance is seeking the identification of domestic manufacturers as potential supply
sources for the exact VRF System specified herein, as well as potential domestic manufacturing sources for VRF
Systems of other, unspecified sizes and capacities.
Opportunity Synopsis Posted by NIST MEP
on MEP Connect: Feb 19, 2015
MEP Center responses due to NIST MEP
via MEP Connect: Mar 6, 2015
U.S. Department of Transportation Federal Transit Administration – NIST MEP Supplier Scouting
ATTACHMENT: VRF SYSTEM TECHNICAL SPECIFICATIONS
PACKAGED COMPRESSOR AND CONDENSER UNITS
PART 1 - GENERAL
1.01 SUMMARY
A. Section includes packaged, air-cooled, refrigerant compressor and condenser units for both the DOAS system and the
VRF system.
1.02 ACTION SUBMITTALS
A. Product Data: For each type of product indicated.
B. LEED Submittals:
1. Product Data for Prerequisite EA 2: Documentation indicating that units comply with applicable requirements in
ASHRAE/IESNA 90.1.
C. Shop Drawings: For compressor and condenser units. Include plans, elevations, sections, details, and attachments to
other work.
1. Wiring Diagrams: For power, signal, and control wiring.
1.03 QUALITY ASSURANCE
A. Electrical Components, Devices, and Accessories: Listed and labeled as defined in NFPA 70, by a qualified testing
agency, and marked for intended location and application.
B. Fabricate and label refrigeration system according to ASHRAE 15, "Safety Standard for Refrigeration Systems."
C. ASHRAE/IESNA 90.1 Compliance: Applicable requirements in ASHRAE/IESNA 90.1, Section 6, "Heating, Ventilating,
and Air-Conditioning."
1.04 WARRANTY
A. Special Warranty: Manufacturer's standard form in which manufacturer agrees to repair or replace components of
compressor and condenser units that fail in materials or workmanship within specified warranty period.
1. Failures include, but are not limited to, the following:
a. Compressor failure.
b. Condenser coil leak.
2. Warranty Period: Five years from date of Substantial Completion.
PART 2 - PRODUCTS
2.01 VRF OUTDOOR UNITS (CU-1, CU-2)
A. General: Condensing units for the VRF system shall be same manufacture as the VRF fan coil units specified in Section
23 82 19. The PURY outdoor units shall be equipped with multiple circuit boards that interface to the M-NET controls
system and shall perform all functions necessary for operation. Each outdoor unit module shall be completely factory
assembled, piped and wired and run tested at the factory.
1. The model nomenclature and unit requirements are shown on the drawings. Outdoor unit shall have a sound rating
no higher than 60 dB(A) individually or 64 dB(A) twinned. Units shall have a sound rating no higher than 50 dB(A)
individually or 53 dB(A) twinned while in night mode operation. If an alternate manufacturer is selected, any additional
material, cost, and labor to meet published sound levels shall be incurred by the contractor.
2. Both refrigerant lines from the outdoor unit to the BC (Branch Circuit) Controller (Single or Main) shall be insulated.
3. There shall be no more than 3 branch circuit controllers connected to any one outdoor unit.
4. The outdoor unit shall have an accumulator with refrigerant level sensors and controls.
5. The outdoor unit shall have a high pressure safety switch, over-current protection, crankcase heater and DC bus
protection.
Opportunity Synopsis Posted by NIST MEP
on MEP Connect: Feb 19, 2015
MEP Center responses due to NIST MEP
via MEP Connect: Mar 6, 2015
U.S. Department of Transportation Federal Transit Administration – NIST MEP Supplier Scouting
6. The outdoor unit shall be capable of operating in heating mode down to -4°F ambient temperatures or cooling mode
down to 23°F ambient temperatures, without additional low ambient controls. If an alternate manufacturer is selected,
any additional material, cost, and labor to meet low ambient operating condition and performance shall be incurred by
the contractor.
7. The outdoor unit shall have a high efficiency oil separator plus additional logic controls to ensure adequate oil volume
in the compressor is maintained.
8. The outdoor unit shall be provided with a manufacturer supplied 20 gauge hot dipped galvanized snow/hail guard.
9. Unit must defrost all circuits simultaneously in order to resume full heating more quickly. Partial defrost which may
extend “no or reduced heating” periods shall not be allowed.
B. Unit Cabinet:
1. The casing(s) shall be fabricated of galvanized steel, bonderized and finished.
C. Fan:
1. Each outdoor unit module shall be furnished with one direct drive, variable speed propeller type fan. The fan shall be
factory set for operation under 0 in. WG external static pressure, but capable of normal operation under a maximum of
0.24 in. WG external static pressure via dipswitch.
2. All fan motors shall have inherent protection, have permanently lubricated bearings, and be completely variable
speed.
3. All fan motors shall be mounted for quiet operation.
4. All fans shall be provided with a raised guard to prevent contact with moving parts.
5. The outdoor unit shall have vertical discharge airflow.
D. Refrigerant
1. R410A refrigerant shall be required
E. Polyolester (POE) oil shall be required.
F. Coil:
1. The outdoor coil shall be of nonferrous construction with lanced or corrugated plate fins on copper tubing.
2. The coil fins shall have a factory applied corrosion resistant blue-fin finish.
3. The coil shall be protected with an integral metal guard.
4. Refrigerant flow from the outdoor unit shall be controlled by means of an inverter driven compressor.
5. The outdoor coil shall include 4 circuits with two position valves for each circuit, except for the last stage.
G. Compressor:
1. Each outdoor unit module shall be equipped with one inverter driven scroll hermetic compressor. Non inverterdriven compressors, which cause inrush current (demand charges) and require larger wire sizing, shall not be allowed.
2. A crankcase heater(s) shall be factory mounted on the compressor(s).
3. The outdoor unit compressor shall have an inverter to modulate capacity. The capacity shall be completely variable
with a turndown of 19%-5% of rated capacity, depending upon unit size.
4. The compressor will be equipped with an internal thermal overload.
5. The compressor shall be mounted to avoid the transmission of vibration.
H. Controls:
1. The outdoor unit shall have the capability of up to 8 levels of demand control for each refrigerant system
I. Electrical:
1. The outdoor unit electrical power shall be 480volts, 3-phase, 60 hertz.
2. The outdoor unit shall be controlled by integral microprocessors.
3. The control circuit between the indoor units, BC Controller and the outdoor unit shall be 24VDC completed using a 2conductor, twisted pair shielded cable to provide total integration of the system.
2.02 Branch CIRCUIT (BC) controllers FOR R2-SERIES SYSTEMS
A. General: The BC (Branch Circuit) Controllers shall include multiple branches to allow simultaneous heating and
cooling by allowing either hot gas refrigerant to flow to indoor unit(s) for heating or subcooled liquid refrigerant to flow
to indoor unit(s) for cooling. Refrigerant used for cooling must always be subcooled for optimal indoor unit LEV
performance; alternate branch devices with no subcooling risk bubbles in liquid supplied to LEV and are not allowed.
Opportunity Synopsis Posted by NIST MEP
on MEP Connect: Feb 19, 2015
MEP Center responses due to NIST MEP
via MEP Connect: Mar 6, 2015
U.S. Department of Transportation Federal Transit Administration – NIST MEP Supplier Scouting
The BC (Branch Circuit) Controllers shall be specifically used with R410A R2-Series systems. These units shall be
equipped with a circuit board that interfaces to the MNET controls system and shall perform all functions necessary for
operation. The unit shall have a galvanized steel finish. The BC Controller shall be completely factory assembled, piped
and wired. Each unit shall be run tested at the factory. This unit shall be mounted indoors, with access and service
clearance provided for each controller. The sum of connected capacity of all indoor air handlers shall range from 50% to
150% of rated capacity.
B. BC Unit Cabinet:
1. The casing shall be fabricated of galvanized steel or factory standard baked enamel finish
2. Each cabinet shall house a liquid-gas separator and multiple refrigeration control valves.
3. The unit shall house tube-in-tube heat exchangers.
C. Refrigerant
1. R410A refrigerant shall be required.
D. Refrigerant valves:
1. The unit shall be furnished with multiple branch circuits which can individually accommodate up to 54,000 BTUH and
up to three indoor units. Branches may be twinned to allow more than 54,000 BTUH.
2. Each branch shall have multiple two-position valves to control refrigerant flow.
3. Service shut-off valves shall be field-provided/installed for each branch to allow service to any indoor unit without
field interruption to overall system operation.
4. Linear electronic expansion valves shall be used to control the variable refrigerant flow.
E. Future Use
1. Each VRF system shall include at least one (1) unused branches or branch devices for future use. Branches shall be
fully installed & wired in central location with capped service shutoff valve & service port.
F. Integral Drain Pan:
1. 1. An Integral drain pan and drain shall be provided
G. Electrical:
1. The unit electrical power shall be 480 volts, 1 phase, 60 Hertz.
2. The BC Controller shall be controlled by integral microprocessors
3. The control circuit between the indoor units and outdoor units shall be 24VDC completed using a 2-conductor,
twisted pair shielded cable to provide total integration of the system.
2.03 COMPRESSOR AND CONDENSER UNITS, AIR COOLED (CU-3)
A. Refrigerant: R-410A.
B. Condenser Coil: Seamless copper-tube, aluminum-fin coil, including subcooling circuit and backseating liquid-line
service access valve. Factory pressure test coils, then dehydrate by drawing a vacuum and fill with a holding charge of
nitrogen or refrigerant.
C. Condenser Fan: Propeller-type vertical discharge; either directly or belt driven. Include the following:
1. Permanently lubricated, ball-bearing totally enclosed motors.
2. Separate motor for each fan.
3. Dynamically and statically balanced fan assemblies.
D. Operating and safety controls include the following:
1. Manual-reset, high-pressure cutout switches.
2. Automatic-reset, low-pressure cutout switches.
3. Low-oil-pressure cutout switch.
4. Compressor-winding thermostat cutout switch.
5. Three-leg, compressor-overload protection.
6. Control transformer.
7. Magnetic contactors for compressor and condenser fan motors.
8. Timer to prevent excessive compressor cycling.
E. Accessories:
1. Low-Ambient Controller: Controls condenser fan speed to permit operation down to minus 20 deg F (minus 29 deg C)
with time-delay relay to bypass low-pressure switch.
Opportunity Synopsis Posted by NIST MEP
on MEP Connect: Feb 19, 2015
MEP Center responses due to NIST MEP
via MEP Connect: Mar 6, 2015
U.S. Department of Transportation Federal Transit Administration – NIST MEP Supplier Scouting
2. Gage Panel: Package with refrigerant circuit suction and discharge gages.
3. Part-winding-start timing relay, circuit breakers, and contactors.
F. Unit Casings: Designed for outdoor installation with weather protection for components and controls and with
removable panels for required access to compressors, controls, condenser fans, motors, and drives. Additional features
include the following:
1. Steel, galvanized or zinc coated, for exposed casing surfaces; treated and finished with manufacturer's standard paint
coating.
2. Perimeter base rail with forklift slots and lifting holes to facilitate rigging.
3. Gasketed control panel door.
4. Nonfused disconnect switch, factory mounted and wired, for single external electrical power connection. If factory
mounted is not available, provide disconnect for mounting in the field by Division 23 contractor.
5. Condenser coil grille.
G. Capacities and Characteristics: As Scheduled on the Drawings
2.04 SOURCE QUALITY CONTROL
A. Energy Efficiency: Equal to or greater than prescribed by ASHRAE/IESNA 90.1, "Energy Efficient Design of New
Buildings except Low-Rise Residential Buildings," Section 6, "Heating, Ventilating, and Air-Conditioning."
B. Testing Requirements: Factory test sound-power-level ratings according to ARI 270.
PART 3 - EXECUTION
3.01 INSTALLATION
A. Install units level and plumb, firmly anchored in locations indicated.
B. Install roof-mounting units on equipment supports specified in Section 07 72 00 "Roof Accessories."
C. Maintain manufacturer's recommended clearances for service and maintenance.
D. Loose Components: Install electrical components, devices, and accessories that are not factory mounted.
3.02 CONNECTIONS
A. Comply with requirements for piping in Section 23 21 13 "Hydronic Piping" and Section 23 21 16 "Hydronic Piping
Specialties." Section 15179 "Hydronic Piping Specialties." Drawings indicate general arrangement of piping, fittings,
and specialties.
B. Where installing piping adjacent to equipment, allow space for service and maintenance of equipment.
C. Connect precharged refrigerant tubing to unit's quick-connect fittings. Install tubing so it does not interfere with
access to unit. Install furnished accessories.
D. Connect refrigerant piping to condenser units; maintain required access to unit. Install furnished field-mounted
accessories. Refrigerant piping and specialties are specified in Section 23 23 00 "Refrigerant Piping."
3.03 FIELD QUALITY CONTROL
A. Perform tests and inspections.
B. Tests and Inspections: Provide factory representative startup and first year warranty site visits
1. Perform each visual and mechanical inspection and electrical test. Certify compliance with test parameters.
2. Leak Test: After installation, charge system with refrigerant and oil and test for leaks. Repair leaks, replace lost
refrigerant and oil, and retest until no leaks exist.
3. Operational Test: After electrical circuitry has been energized, start units to confirm proper motor operation and unit
operation, product capability, and compliance with requirements.
4. Test and adjust controls and safeties. Replace damaged and malfunctioning controls and equipment.
5. Verify proper airflow over coils.
C. Verify that vibration isolation and flexible connections properly dampen vibration transmission to structure.
Opportunity Synopsis Posted by NIST MEP
on MEP Connect: Feb 19, 2015
MEP Center responses due to NIST MEP
via MEP Connect: Mar 6, 2015
U.S. Department of Transportation Federal Transit Administration – NIST MEP Supplier Scouting
FAN COIL UNITS
PART 1 - GENERAL
1.01 SUMMARY
A. Section includes fan coil units and accessories for Variable Refrigerant Flow (VRF) units.
B. The variable capacity, heat pump heat recovery air conditioning system shall be equal to a Mitsubishi VRFZ (Variable
Refrigerant Flow Zoning), which is the basis of design. Other manufacturers include Daikin, LG and Sanyo. If system
configuration and or other parameters are changed to meet equal manufacturer standards, changes to plans shall be
the responsibility of the manufacturer and shall be submitted at the Action and Informational Submittal Phases for
Design Professional review.
C. The system shall consist of an outdoor unit (CU-1 & CU-2 specified in Section 23 62 00), BC (Branch Circuit) Controller
or controllers, multiple indoor units, and BACNET based (BTL Listed) DDC (Direct Digital Controls). Each indoor unit or
group of indoor units shall be capable of operating in any mode independently of other indoor units or groups. System
shall be capable of changing mode (cooling to heating, heating to cooling) with no interruption to system operation. To
ensure owner comfort, each indoor unit or group of indoor units shall be independently controlled and capable of
changing mode automatically when zone temperature strays 1.8 degrees F from set point for ten minutes. The sum of
connected capacity of all indoor air handlers shall range from 50% to 150% of outdoor rated capacity.
1.02 ACTION SUBMITTALS
A. Product Data: For each type of product.
B. LEED Submittals:
1. Product Data for Prerequisite IEQ 1: Documentation indicating that units comply with ASHRAE 62.1, Section 5 "Systems and Equipment."
C. Shop Drawings:
1. Include details of equipment assemblies. Indicate dimensions, weights, loads, required clearances, method of field
assembly, components, and location and size of each field connection.
2. Include diagrams for power, signal, and control wiring.
D. Samples: For units with factory-applied color finishes.
1.03 INFORMATIONAL SUBMITTALS
A. Coordination Drawings: If system is of different manufacture than basis of design and layout or design is different
than that shown on drawings, submit drawings showing unit layout, locations, branch controllers number and locations,
refrigerant pipe routings and piping schematics, etc. This will include a revised drawing similar to Drawing M401.
B. Seismic Qualification Certificates: For fan coil units, accessories, and components, from manufacturer.
C. Field quality-control reports.
D. Sample warranty.
1.04 CLOSEOUT SUBMITTALS
A. Operation and maintenance data.
1.05 QUALITY ASSURANCE
A. Comply with NFPA 70.
B. ASHRAE Compliance: Applicable requirements in ASHRAE 62.1, Section 5 - "Systems and Equipment" and Section 7 "Construction and Startup."
C. ASHRAE/IES 90.1 Compliance: Applicable requirements in ASHRAE/IES 90.1, Section 6 - "Heating, Ventilating, and AirConditioning."
D. The units shall be listed by Electrical Testing Laboratories (ETL) and bear the ETL label.
E. All wiring shall be in accordance with the National Electrical Code (N.E.C.).
F. The units shall be manufactured in a facility registered to ISO 9001 and ISO14001 which is a set of standards applying
to environmental protection set by the International Standard Organization (ISO).
Opportunity Synopsis Posted by NIST MEP
on MEP Connect: Feb 19, 2015
MEP Center responses due to NIST MEP
via MEP Connect: Mar 6, 2015
U.S. Department of Transportation Federal Transit Administration – NIST MEP Supplier Scouting
G. All units must meet or exceed the 2010 Federal minimum efficiency requirements and the proposed ASHRAE 90.1
efficiency requirements for VRF systems. Efficiency shall be published in accordance with the DOE alternative test
procedure, which is based on the Air-Conditioning, Heating, and Refrigeration Institute (AHRI) Standards 340/360, 1230
and ISO Standard 13256-1.
H. A full charge of R-410A for the condensing unit only shall be provided in the condensing unit.
PART 2 - PRODUCTS
2.01 SYSTEM DESCRIPTION
A. Electrical Components, Devices, and Accessories: Listed and labeled as defined in NFPA 70, by a qualified testing
agency, and marked for intended location and application.
B. Factory-packaged and -tested units rated according to AHRI 440, ASHRAE 33, and UL 1995.
2.02 4-WAY CEILING-RECESSED CASSETTE WITH GRILLE
A. This unit shall be a four-way cassette style indoor unit that recesses into the ceiling with a ceiling grille. The indoor
unit shall be factory assembled, wired and run tested. Contained within the unit shall be all factory wiring, piping,
electronic modulating linear expansion device, control circuit board and fan motor. The unit shall have a self diagnostic
function, 3-minute time delay mechanism, an auto restart function, an emergency operation function, a test run switch,
and the ability to adjust airflow patterns for different ceiling heights. Indoor unit and refrigerant pipes shall be charged
with dehydrated air before shipment from the factory.
B. Unit Cabinet:
1. The cabinet shall be space-saving ceiling-recessed cassette.
2. The cabinet panel shall have provisions for a field installed filtered outside air intake.
3. Branch ducting shall be allowed from cabinet.
4. Four-way grille shall be fixed to bottom of cabinet allowing two, three or four-way blow.
5. The grille vane angles shall be individually adjustable from the wired remote controller to customize the airflow
pattern for the conditioned space
C. Fan:
1. The indoor fan shall be an assembly with a turbo fan direct driven by a single motor.
2. The indoor fan shall be statically and dynamically balanced to run on a motor with permanently lubricated bearings.
3. The indoor fan shall consist of five (5) speed settings, Low, Mid1, Mid2, High and Auto.
4. The fan shall have a selectable Auto fan setting that will adjust the fan speed based on the difference between
controller set-point and space temperature.
5. The indoor unit shall have an adjustable air outlet system offering 4-way airflow, 3-way airflow, or 2-way airflow.
6. The indoor unit shall have switches that can be set to provide optimum airflow based on ceiling height and number of
outlets used.
7. The indoor unit vanes shall have 5 fixed positions and a swing feature that shall be capable of automatically swinging
the vanes up and down for uniform air distribution.
D. The vanes shall have an Auto-Wave selectable option in the heating mode that shall randomly cycle the vanes up and
down to evenly heat the space. Filter:
1. Return air shall be filtered by means of a long-life washable filter
E. Coil:
1. The indoor coil shall be of nonferrous construction with smooth plate fins on copper tubing.
2. The tubing shall have inner grooves for high efficiency heat exchange.
3. All tube joints shall be brazed with phos-copper or silver alloy.
4. The coils shall be pressure tested at the factory.
5. A condensate pan and drain shall be provided under the coil.
6. The unit shall be provided with an integral condensate lift mechanism that will be able to raise drain water 33 inches
above the condensate pan.
7. Both refrigerant lines to the PLFY indoor units shall be insulated.
Opportunity Synopsis Posted by NIST MEP
on MEP Connect: Feb 19, 2015
MEP Center responses due to NIST MEP
via MEP Connect: Mar 6, 2015
U.S. Department of Transportation Federal Transit Administration – NIST MEP Supplier Scouting
2.03 4-WAY CEILING-RECESSED CASSETTE WITH GRILLE INDOOR UNIT
A. General: This shall be a four-way cassette style indoor unit that recesses into the ceiling with a ceiling grille. The
indoor unit shall be factory assembled, wired and run tested. Contained within the unit shall be all factory wiring,
piping, electronic modulating linear expansion device, control circuit board and fan motor. The unit shall have a selfdiagnostic function, 3-minute time delay mechanism, an auto restart function, an emergency operation function and a
test run switch. Indoor unit and refrigerant pipes shall be charged with dehydrated air before shipment from the
factory.
B. Unit Cabinet:
1. The cabinet shall be a compact 22-7/16” wide x 22-7/16” deep so it will fit within a standard 24” square suspended
ceiling grid.
2. The cabinet panel shall have provisions for a field installed filtered outside air intake.
3. Four-way grille shall be fixed to bottom of cabinet allowing two, three or four-way blow.
C. Fan:
1. The indoor fan shall be an assembly with a turbo fan direct driven by a single motor.
2. The indoor fan shall be statically and dynamically balanced to run on a motor with permanently lubricated bearings.
3. The indoor fan shall consist of three (3) speeds, Low, Mid, and High.
4. The indoor unit shall have an adjustable air outlet system offering 4-way airflow, 3-way airflow, or 2-way airflow.
5. The auto air swing vanes shall be capable of automatically swinging up and down for uniform air distribution.
D. Filter:
1. Return air shall be filtered by means of a long-life washable filter.
E. Coil:
1. The indoor coil shall be of nonferrous construction with smooth plate fins on copper tubing.
2. The tubing shall have inner grooves for high efficiency heat exchange.
3. All tube joints shall be brazed with phos-copper or silver alloy.
4. The coils shall be pressure tested at the factory.
5. A condensate pan and drain shall be provided under the coil.
6. The unit shall be provided with an integral condensate lift mechanism that will be able to raise drain water 19-3/4”
inches above the condensate pan.
7. Both refrigerant lines to the PLFY indoor units shall be insulated.
2.04 1-WAY CEILING-RECESSED CASSETTE WITH GRILLE INDOOR UNIT
A. General: This shall be a one-way cassette indoor unit that recesses into the ceiling with a ceiling grille and shall have
a modulating linear expansion device. The indoor unit shall be factory assembled, wired and run tested. Contained
within the unit shall be all factory wiring, piping, electronic modulating linear expansion device, control circuit board
and fan motor. The unit shall have a self-diagnostic function, 3-minute time delay mechanism, an auto restart function,
an emergency operation function and a test run switch. Indoor unit and refrigerant pipes shall be charged with
dehydrated air before shipment from the factory.
B. Unit Cabinet:
1. The cabinet shall be space-saving ceiling recessed.
2. The cabinet panel shall have provisions for a field installed filtered outside air intake.
3. Branch ducting shall be allowed from cabinet.
4. The one-way grille shall be fixed to bottom of cabinet allowing for one-way airflow.
C. Fan:
1. The indoor fan shall be an assembly with one line-flow fan direct driven by a single motor.
2. The indoor fan shall be statically and dynamically balanced to run on a motor with permanently lubricated bearings.
3. The indoor fan shall consist of four (4) speeds, Low, Mid1, Mid2, and High.
D. Filter:
1. Return air shall be filtered by means of a long-life washable permanent filter.
E. Coil:
1. The indoor coil shall be of nonferrous construction with smooth plate fins on copper tubing.
2. The tubing shall have inner grooves for high efficiency heat exchange.
Opportunity Synopsis Posted by NIST MEP
on MEP Connect: Feb 19, 2015
MEP Center responses due to NIST MEP
via MEP Connect: Mar 6, 2015
U.S. Department of Transportation Federal Transit Administration – NIST MEP Supplier Scouting
3. All tube joints shall be brazed with phos-copper or silver alloy.
4. The coils shall be pressure tested at the factory.
5. A condensate pan and drain shall be provided under the coil.
6. The unit shall be provided with an integral condensate lift mechanism able to raise drain water 23 inches above the
condensate pan.
7. Both refrigerant lines to the PMFY indoor units shall be insulated.
2.05 CEILING-CONCEALED DUCTED INDOOR UNIT
A. General: This shall be a ceiling-concealed ducted indoor fan coil design that mounts above the ceiling with a 2position, field adjustable return and a fixed horizontal discharge supply and shall have a modulating linear expansion
device. The PEFY shall be used with the R2-Series outdoor unit and BC Controller, Y-Series outdoor unit, or S-Series
outdoor unit. The PEFY shall support individual control using M-NET DDC controllers.
B. Indoor Unit: The indoor unit shall be factory assembled, wired and run tested. Contained within the unit shall be all
factory wiring, piping, electronic modulating linear expansion device, control circuit board and fan motor. The unit shall
have a self diagnostic function, 3-minute time delay mechanism, and an auto restart function. Indoor unit and
refrigerant pipes shall be charged with dehydrated air before shipment from the factory.
C. Unit Cabinet:
1. The unit shall be, ceiling-concealed, ducted.
2. The cabinet panel shall have provisions for a field installed filtered outside air intake.
D. Fan:
1. Concealed ducted models shall feature external static pressure settings from 0.14 to 0.60 in. WG.
2. The indoor unit fan shall be an assembly with one or two Sirocco fan(s) direct driven by a single motor.
3. The indoor fan shall be statically and dynamically balanced and run on a motor with permanently lubricated bearings.
4. The indoor fan shall consist of three (3) speeds, High, Mid, and Low plus the Auto-Fan function
5. The indoor unit shall have a ducted air outlet system and ducted return air system.
E. Filter:
1. Return air shall be filtered by means of a standard factory installed return air filter.
2. Optional return filter box (rear or bottom placement) with high-efficiency filter shall be available for all PEFY indoor
units.
F. Coil:
1. The indoor coil shall be of nonferrous construction with smooth plate fins on copper tubing.
2. The tubing shall have inner grooves for high efficiency heat exchange.
3. All tube joints shall be brazed with phos-copper or silver alloy.
4. The coils shall be pressure tested at the factory.
5. A condensate pan and drain shall be provided under the coil.
6. The condensate shall be gravity drained from the fan coil.
7. Both refrigerant lines to the PEFY indoor units shall be insulated.
G. Electrical:
1. The unit electrical power shall be 208/230 volts, 1-phase, 60 hertz.
2. The system shall be capable of satisfactory operation within voltage limits of 187-228 volts (208V/60Hz) or 207-253
volts (230V/60Hz).
H. Controls:
1. This unit shall use controls provided by Mitsubishi Electric Cooling & Heating to perform functions necessary to
operate the system. Please refer to Part 5 of this guide specification for details on controllers and other control options.
2. Indoor unit shall compensate for the higher temperature sensed by the return air sensor compared to the
temperature at level of the occupant when in HEAT mode. Disabling of compensation shall be possible for individual
units to accommodate instances when compensation is not required.
3. Control board shall include contacts for control of external heat source. External heat may be energized as second
stage with 1.8°F – 9.0°F adjustable deadband from set point.
4. Indoor unit shall include no less than four (4) digital inputs capable of being used for customizable control strategies.
Opportunity Synopsis Posted by NIST MEP
on MEP Connect: Feb 19, 2015
MEP Center responses due to NIST MEP
via MEP Connect: Mar 6, 2015
U.S. Department of Transportation Federal Transit Administration – NIST MEP Supplier Scouting
5. Indoor unit shall include no less than three (3) digital outputs capable of being used for customizable control
strategies.
I. Capacities and Characteristics: as scheduled on drawings.
PART 3 - EXECUTION
3.01 INSTALLATION
A. Install fan coil units level and plumb.
B. Install fan coil units to comply with NFPA 90A.
C. Suspend fan coil VRF units from structure with elastomeric hangers.
D. Verify locations of thermostats, humidistats, and other exposed control sensors with Drawings and room details
before installation. Install devices 48 inches (1220 mm) above finished floor.
E. Install new filters in each fan coil unit within two weeks after Substantial Completion.
F. Piping installation requirements are specified in other Sections. Drawings indicate general arrangement of piping,
fittings, and specialties. Specific connection requirements are as follows:
1. Install piping adjacent to machine to allow service and maintenance.
2. Connect piping to fan coil unit factory DX piping package. Install piping package if shipped loose.
3. Connect ductwork to concealed units as required by MFR.
4. Connect condensate drain to indirect waste.
a. Install condensate trap of adequate depth to seal against fan pressure. Install cleanouts in piping at changes of
direction.
G. Ground equipment according to Section 26 05 26 "Grounding and Bonding for Electrical Systems."
H. Connect wiring according to Section 26 05 19 "Low-Voltage Electrical Power Conductors and Cables."
3.02 FIELD QUALITY CONTROL
A. Perform the following tests and inspections[ with the assistance of a factory-authorized service representative]:
1. Operational Test: After electrical circuitry has been energized, start units to confirm proper motor rotation and unit
operation.
2. Test and adjust controls and safety devices. Replace damaged and malfunctioning controls and equipment.
B. Remove and replace malfunctioning units and retest as specified above.
C. Prepare test and inspection reports.
3.03 ADJUSTING
A. Adjust initial temperature and humidity set points.
B. Occupancy Adjustments: When requested within 12 months of date of Substantial Completion, provide on-site
assistance in adjusting system to suit actual occupied conditions
Opportunity Synopsis Posted by NIST MEP
on MEP Connect: Feb 19, 2015
MEP Center responses due to NIST MEP
via MEP Connect: Mar 6, 2015