BCS Ryan Elementary Food Service Ventilation Hood Replacement Bid Package #2 - Addendum No. 2 - 2024.02.23.pdf
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- Solicitation number
- RFP - BRC - 240000001107
- Issued by
- Branch County, Michigan
About this file
This document is an addendum for a state and local contract opportunity related to the Bronson Community Schools (BCS) Ryan Elementary Food Service Ventilation Hood Replacement Bid Package #2 project in Bronson, Michigan. The addendum includes changes and clarifications to the original bidding documents, such as updated specifications for exhaust fans, floor drains, and piping. It also provides details on the replacement of the exhaust fan serving the toilet rooms. Key dates include the original bid issue on February 13, 2024 and the addendum issuance on February 23, 2024.
The contract opportunity involves the replacement of the food service ventilation hoods and associated mechanical, electrical, and plumbing systems at the Ryan Elementary School. The project is being managed by TowerPinkster on behalf of BCS. The addendum provides additional information for bidders to consider when submitting their proposals, including changes to specifications and drawings. No pricing terms, set asides, or funding details are included in the addendum.
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Nurturing curiosity through design since 1953 • towerpinkster.com
©2024 Tower Pinkster Titus Associates, Inc.
ADDENDUM NO. 2
DATE OF ISSUANCE: February 23, 2024
PROJECT: Ryan Food Service Ventilation Hood Replacement – Bid Package 2
461 Rudd St.
Bronson, MI 49028
OWNER: Bronson Community School
ARCHITECT’S PROJECT NO.: 23-158.012
ORIGINAL BID ISSUE DATE: February 13, 2024
SCOPE OF WORK
This Addendum includes changes to, or clarifications of, the original Bidding Documents and any previously issued addenda, and shall be included in the Bid. All of these Addendum items form a part of the Contract Documents. The Bidder shall acknowledge receipt of this Addendum in the appropriate space provided on the Bid Form. Failure to do so may result in disqualification of the Bid.
DOCUMENTS INCLUDED IN THIS ADDENDUM
This Addendum includes 1 pages of text and the following documents:
• Bidding Requests for Information (BRFI): BRFI 1, BRFI 2, BRFI 3
• Bidding Documents: None
• Contract Conditions: None
• Specification Sections: 22 1319, 23 0513, 23 0593, 23 3300, 23 3423
• Drawings: PD 101, P 150, P 501, M 601
CHANGES TO PREVIOUSLY ISSUED ADDENDA
None.
CHANGES TO BIDDING REQUIREMENTS
None.
CHANGES TO CONTRACT CONDITIONS
None.
CHANGES TO SPECIFICATIONS
2.23.2024 Addendum No. 2 // Ryan Food Service Ventilation Hood Replacement BP2 // 23-158.012 2
©2024 Tower Pinkster Titus Associates, Inc.
ADD-1 Item No. S-1 - Added EF Specs
Refer to Specification Section: 23 0513, 23 0593, 23 3300, 23 3423
Spec section 23 0513, 23 0593, 23 3300, 23 3423 added.
ADD-1 Item No. S-2 - FD Spec Clarification
Refer to Specification Section: 22 1319
Spec section 22 1319 revised.
CHANGES TO DRAWINGS
ADD-1 Item No. D-1 - Toilet Room EF Replaced
Refer to Sheet(s): PD 101, P 150, P 501, M 601
Exhaust fan serving Men’s 133, Janitor 134, Storage 135, and Girl’s 136 to get replaced. Associated schedule, detail, and controls added.
(Not sheeted) Remove connections to mechanical equipment including disconnect, starter, and all associated conduit and wire back to nearest active junction box. Coordinate with mechanical. Rework and extend existing circuit as required to connect to new equipment in place of existing.
END OF ADDENDUM.
BRFI FORM
Project Number:
023-158.012
Project:
Bronson Community Schools Ryan Elementary School Food Service Ventilation Hood Replacement BP #2
BRFI #: (to be assigned by architect)
Date: 2/16/2024
To:
Doug Milburn Project Manager dmilburn@towerpinkster.com TowerPinkster 242 E. Kalamazoo Avenue Suite 100 Kalamazoo, MI 49007 Phone: 269.343.6133 Fax: 269.343.6633
RFI Subject: Mechanical Scope of work
From: (Individual)
Contractor: Manchester Mechanical Spec Section:
Phone: 2694322998 Dwg(s):
Fax: Detail #:
E-Mail: savanna@manchestermechanicalservices.com Cost Impact:
Bid Package#:
Time Impact:
Request:
Could you please clarify the scope of work from Stafford Smith and Great Lakes on the food service equipment? We need to know where their scope ends and where ours begins for all 3 hood replacements.
Possible Solution:
Response:
Answered by: Date:
aueck Text Box FSEC will provide the hoods, ductwork and rooftop units (and curbs). FSEC will hang the hoods, run the ductwork and set the units on the roof. FSEC will provide fire suppression (ansul) system for the hood as well. This will be piped by FSEC and wired by trades.
Trades will need to wire the hood controls to the rooftop units. As well as hook up the building fire system to the hood.
Mechanical contractor shouldn’t have anything to do with the food service hoods.
aueck Text Box 02/22/2024 aueck Image
Project Number:
023-158.012
Project:
Bronson Community Schools Ryan Elementary School Food Service Ventilation Hood Replacement BP #2
BRFI #: (to be assigned by architect)
Date: 2/16/2024
To:
Doug Milburn Project Manager dmilburn@towerpinkster.com TowerPinkster 242 E. Kalamazoo Avenue Suite 100 Kalamazoo, MI 49007 Phone: 269.343.6133 Fax: 269.343.6633
RFI Subject: Mechanical Scope of work
From: (Individual)
Contractor: Manchester Mechanical Spec Section:
Phone: 2694322998 Dwg(s):
Fax: Detail #:
E-Mail: savanna@manchestermechanicalservices.com Cost Impact:
Bid Package#:
Time Impact:
Request:
Please confirm the exhaust fan is going to be replaced and what the specifics are of that replacement.
I did not see anything on the plans pertaining to the exhaust fan in the bathroom area at Ryan Elementary.
jsicoli Text Box Julia Sicoli EIT jsicoli Text Box 2-23-24 jsicoli Text Box Refer to Addendum No. 2 for toilet room exhaust fan replacement details.
To:
Doug Milburn Project Manager dmilburn@towerpinkster.com TowerPinkster 242 E. Kalamazoo Avenue Suite 100 Kalamazoo, MI 49007 Phone: 269.343.6133 Fax: 269.343.6633
Project Number: 023-158.012
Project:
Bronson Community Schools Ryan Elementary School Food Service Ventilation Hood Replacement BP #2
BRFI #: (to be assigned by architect)
Date:
RFI Subject:
From: (Individual)
Contractor: (Contractor) Spec Section:
Phone: Dwg(s):
Fax: Detail #:
E-Mail: Cost Impact:
Bid Package#: Time Impact:
Request:
2-22-24
Floor Drain Spec
22 1319; 2.2, B
P101 Jergens Piping
Sanitary Waste Piping Specialties 22 1319 (all three projects) list a FD-1 (toilet rooms and other finished areas) and a FD-3 (mechanical rooms) for the Floor Drains on these projects. Ryan Elementary shows a FD-2 in the Kitchen and no spec is provided for a FD-2, Please provide spec for a FD-2. At the JR/SR High no new floor drain shown in the kitchen, I assume this is correct, please confirm. At Anderson Elementary P101 shows a new FD-1 in the Kitchen, please clarify if this drain is properly tagged and should be the same as a typical toilet room FD-1.
jsicoli Text Box Julia Sicoli EIT jsicoli Text Box 2-23-24 jsicoli Text Box Ryan Elementary: FD-1 designated for toilet rooms and FD-2 designated for the kitchen. Refer to updated spec in Addendum 2.
Anderson Elementary: FD-1 designated for the kitchen. Refer to updated spec in Addendum 2.
Jr/Sr High School: Correct, we are utilizing an existing floor drain. Refer to keyed note 12.
PROJECT NO. 23158.012 SANITARY WASTE PIPING SPECIALTIES
RYAN FOOD SERVICE VENTILATION HOOD REPLACEMENT - BID PACKAGE 2 22 1319 - 1
BRONSON COMMUNITY SCHOOL FEBRUARY 23, 2024
[Copyright] 2024 Tower Pinkster Titus Associates - All Rights Reserved
SECTION 22 1319 - SANITARY WASTE PIPING SPECIALTIES
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 the following sanitary drainage piping specialties:
1. Cleanouts.
2. Floor drains.
3. Trap-seal protection devices.
1.3 DEFINITIONS
A. ABS: Acrylonitrile-butadiene-styrene.
B. FOG: Fats, oils, and greases.
C. PVC: Polyvinyl chloride.
1.4 ACTION SUBMITTALS
A. Product Data: For each type of product indicated.
1.5 QUALITY ASSURANCE
A. Drainage piping specialties shall bear label, stamp, or other markings of specified testing agency.
B. Comply with NSF 14 for plastic sanitary waste piping specialty components.
PART 2 - PRODUCTS
2.1 CLEANOUTS
A. Cast-Iron Floor Cleanouts:
1. Manufacturers: Subject to compliance with requirements, provide products by one of the following:
a. Josam Company; Josam Div.
b. Sioux Chief Mfg. Co.
RYAN FOOD SERVICE VENTILATION HOOD REPLACEMENT - BID PACKAGE 2 22 1319 - 2
c. Smith, Jay R. Mfg. Co.; Division of Smith Industries, Inc.
d. Tyler Pipe; Wade Div.
e. Watts Drainage Products Inc.
f. Zurn Plumbing Products Group; Light Commercial Operation.
g. Zurn Plumbing Products Group; Specification Drainage Operation.
2. Standard: ASME A112.36.2M for adjustable housing cleanout.
3. Size: Same as connected branch.
4. Type: Adjustable housing.
5. Body or Ferrule: Cast iron.
6. Outlet Connection: Spigot.
7. Closure: Brass plug with straight threads and gasket.
8. Adjustable Housing Material: Cast iron with threads.
9. Riser: ASTM A 74, Service class, cast-iron drainage pipe fitting and riser to cleanout.
10. Accessible Fasteners: Tamper resistant, except in inmate occupied areas provide security pin type fasteners.
a. Refer to Drawing A110.
11. Frame and Cover Type:
a. Ceramic, Mosaic & Quarry Tile Floors: Terrazzo top type with square nickel bronze top.
b. Asphalt & Vinyl Tile Floors: Tile top type with square nickel bronze top.
c. Terrazzo Floors: Terrazzo top type with round nickel bronze top.
d. Other Finished Floors: Heavy duty type with round nickel bronze top.
2.2 FLOOR DRAINS
A. Cast-Iron Floor Drains - General:
1. Manufacturers: Subject to compliance with requirements, provide products by one of the following:
a. Josam Company; Josam Div.
b. MIFAB, Inc.
c. Smith, Jay R. Mfg. Co.; Division of Smith Industries, Inc.
d. Tyler Pipe; Wade Div.
e. Watts Drainage Products Inc.
f. Zurn Plumbing Products Group; Light Commercial Operation.
g. Zurn Plumbing Products Group; Specification Drainage Operation.
2. Standard: ASME A112.6.3.
B. Cast Iron Floor Drains: Coated gray iron body having integral double drainage flange with weep holes and no-hub spigot or push-on bottom outlet. Provide flashing clamp device where located in membrane floor or when flashing is required for pans. Floor drain type designations and sizes are indicated on Drawings and scheduled below:
1. FD-1: Toilet rooms and finished areas not specifically noted, "Wade" 1100G6 or equivalent with 6 inch (150 mm) square nickel bronze adjustable top.
2. FD-3: Mechanical Room Floor sink, "Wade" 9110 8" x 8" x 6" or equivalent with removable cast iron grate, cast iron body, aluminum dome strainer at outlet.
3. FD-2: Kitchen floor sink, "Wade" 9140 12" x 12" x 8" or equivalent with cast iron body, A.R.E. interior, aluminum dome strainer at outlet, 1/2 grate.
RYAN FOOD SERVICE VENTILATION HOOD REPLACEMENT - BID PACKAGE 2 22 1319 - 3
2.3 TRAP SEAL PROTECTION DEVICES
A. Barrier Type Trap Seal Protection Devices:
1. Subject to compliance with requirements, provide SureSeal Manufacturing Inline Floor Drain Trap Sealer, MIFAB MI-GARD Trap Seal, or Jay R. Smith Model 2692 Trap Seal.
2. Standard: ASSE 1072.
3. Size: 2 inch thru 4 inch as required
PART 1 - EXECUTION
1.1 INSTALLATION
A. Refer to Division 22 Section "Common Work Results for Plumbing" for piping joining materials, joint construction, and basic installation requirements.
B. For floor cleanouts for piping below floors, install cleanout deck plates with top flush with finished floor.
C. Install floor drains at low points of surface areas to be drained. Set grates of drains flush with finished floor, unless otherwise indicated.
1. Position floor drains for easy access and maintenance.
2. Set floor drains below elevation of surrounding finished floor to allow floor drainage.
3. Install floor-drain flashing collar or flange so no leakage occurs between drain and adjoining flooring. Maintain integrity of waterproof membranes where penetrated.
4. Install individual traps for floor drains connected to sanitary building drain, unless otherwise indicated.
5. Align square tops parallel with floor tile.
D. Install trap-seal protection devices at floor sink and floor drain outlets (omit at shower floor drains) during trim out stage of project.
E. Install traps on plumbing specialty drain outlets. Omit traps on indirect wastes unless trap is indicated.
F. Install escutcheons at wall, floor, and ceiling penetrations in exposed finished locations and within cabinets and millwork. Use deep-pattern escutcheons if required to conceal protruding pipe fittings.
1.2 CONNECTIONS
A. Piping installation requirements are specified in other Division 22 Sections. Drawings indicate general arrangement of piping, fittings, and specialties.
B. Install piping adjacent to equipment to allow service and maintenance.
1.3 PROTECTION
A. Protect drains during remainder of construction period to avoid clogging with dirt or debris and to prevent damage from traffic or construction work.
RYAN FOOD SERVICE VENTILATION HOOD REPLACEMENT - BID PACKAGE 2 22 1319 - 4
B. Place plugs in ends of uncompleted piping at end of each day or when work stops.
END OF SECTION 22 1319
PROJECT NO. 23158.012 COMMON MOTOR REQUIREMENTS FOR HVAC EQUIPMENT
RYAN FOOD SERVICE VENTILATION HOOD REPLACEMENT - BID PACKAGE 2 23 0513 - 1
SECTION 23 0513 - COMMON MOTOR REQUIREMENTS FOR HVAC EQUIPMENT
PART 1 - GENERAL
1.1 SUMMARY
A. Section includes general requirements for single-phase and polyphase, general-purpose, horizontal, small and medium, squirrel-cage induction motors for use on ac power systems up to 600 V and installed at equipment manufacturer's factory.
1.2 COORDINATION
A. Coordinate features of motors, installed units, and accessory devices to be compatible with the following:
1. Motor controllers.
2. Torque, speed, and horsepower requirements of the load.
3. Ratings and characteristics of supply circuit and required control sequence.
4. Ambient and environmental conditions of installation location.
B. For motors using variable frequency controller, motors to be designed for such application and suitable for use throughout speed range without overheating.
PART 2 - PRODUCTS
2.1 GENERAL MOTOR REQUIREMENTS
A. Comply with requirements in this Section except when stricter requirements are specified in HVAC equipment schedules or Sections.
B. Comply with NEMA MG 1 unless otherwise indicated.
2.2 MOTOR CHARACTERISTICS
A. Duty: Continuous duty at ambient temperature of 40 deg C and at altitude of 3300 feet above sea level.
B. Capacity and Torque Characteristics: Sufficient to start, accelerate, and operate connected loads at designated speeds, at installed altitude and environment, with indicated operating sequence, and without exceeding nameplate ratings or considering service factor.
2.3 POLYPHASE MOTORS
A. Description: NEMA MG 1, Design B, medium induction motor.
B. Efficiency: Energy efficient, as defined in NEMA MG 1.
RYAN FOOD SERVICE VENTILATION HOOD REPLACEMENT - BID PACKAGE 2 23 0513 - 2
1. Provide premium efficient motors where scheduled or when used with a variable frequency controller.
C. Service Factor: 1.15.
D. Multispeed Motors: Variable torque.
1. For motors with 2:1 speed ratio, consequent pole, single winding.
2. For motors with other than 2:1 speed ratio, separate winding for each speed.
E. Multispeed Motors: Separate winding for each speed.
F. Rotor: Random-wound, squirrel cage.
G. Bearings: Regreasable, shielded, antifriction ball bearings suitable for radial and thrust loading.
H. Temperature Rise: Class B.
I. Insulation: Class F.
J. Code Letter Designation:
1. Motors 15 HP and Larger: NEMA starting Code F or Code G.
2. Motors Smaller than 15 HP: Manufacturer's standard starting characteristic.
K. Enclosure Material: Manufacturer’s standard material.
2.4 POLYPHASE MOTORS WITH ADDITIONAL REQUIREMENTS
A. Motors Used with Variable Frequency Controllers: Ratings, characteristics, and features coordinated with controller.
1. Windings: Copper magnet wire with moisture-resistant insulation varnish, designed and tested to resist transient spikes, high frequencies, and short time rise pulses produced by pulse-width modulated inverters.
2. Premium-Efficient Motors: Class B temperature rise; Class F insulation.
3. Shaft Grounding Ring: Factory installed Aegis Model SGR shaft grounding ring consisting of maintenance free, circumferential, bearing protection ring with conductive micro fiber shaft contacting material.
2.5 SINGLE-PHASE MOTORS
A. Motors larger than 1/20 hp shall be one of the following, to suit starting torque and requirements of specific motor application:
1. Permanent-split capacitor.
2. Split phase.
3. Capacitor start, inductor run.
4. Capacitor start, capacitor run.
RYAN FOOD SERVICE VENTILATION HOOD REPLACEMENT - BID PACKAGE 2 23 0513 - 3
B. Multispeed Motors: Variable-torque, permanent-split-capacitor type.
C. Bearings: Prelubricated, antifriction ball bearings or sleeve bearings suitable for radial and thrust loading.
D. Motors 1/20 HP and Smaller: Shaded-pole type.
E. Thermal Protection: Internal protection to automatically open power supply circuit to motor when winding temperature exceeds a safe value calibrated to temperature rating of motor insulation. Thermal-protection device shall automatically reset when motor temperature returns to normal range.
2.6 ELECTRONIC COMMUTATION MOTOR (ECM)
A. Description: Motor to be an electronic commutation motor (ECM) specifically designed for direct drive fan applications. Motors shall be permanently lubricated with heavy-duty ball bearings to match the fan load and prewired to the specific voltage and phase. Internal motor circuitry shall convert AC power supplied to the fan to DC power to operate the motor. Motor shall be speed controllable down to 20% of full speed (80% turndown). Speed shall be controlled by either a potentiometer dial mounted on the motor or by a 0- 10 VDC signal. Motor shall be a minimum of 85% efficient at all speeds.
PART 3 - EXECUTION (Not Applicable)
END OF SECTION 23 0513
PROJECT NO. 23158.012 TESTING, ADJUSTING, AND BALANCING FOR HVAC
RYAN FOOD SERVICE VENTILATION HOOD REPLACEMENT - BID PACKAGE 2 23 0593 - 1
SECTION 23 0593 - TESTING, ADJUSTING, AND BALANCING FOR HVAC
PART 1 - GENERAL
1.1 SUMMARY
A. Section Includes:
1. Balancing Air Systems.
a. Constant-volume air systems.
b. Dual-duct systems.
c. Variable-air-volume systems.
d. Multizone systems.
e. Induction-unit systems.
2. Balancing Hydronic Piping Systems.
a. Constant-flow hydronic systems.
b. Variable-flow hydronic systems.
c. Primary-secondary hydronic systems.
3. Balancing steam systems.
4. Testing, Adjusting, and Balancing Equipment.
a. Heat exchangers.
b. Motors.
c. Chillers.
d. Cooling towers.
e. Condensing units.
f. Boilers.
g. Heat-transfer coils.
5. Testing, adjusting, and balancing existing systems and equipment.
6. Sound tests.
7. Vibration tests.
8. Duct leakage tests.
9. Control system verification.
1.2 DEFINITIONS
A. AABC: Associated Air Balance Council.
B. BAS: Building automation systems.
C. NEBB: National Environmental Balancing Bureau.
D. TAB: Testing, adjusting, and balancing.
E. TABB: Testing, Adjusting, and Balancing Bureau.
F. TAB Specialist: An independent entity meeting qualifications to perform TAB work.
RYAN FOOD SERVICE VENTILATION HOOD REPLACEMENT - BID PACKAGE 2 23 0593 - 2
G. TDH: Total dynamic head.
1.3 PREINSTALLATION MEETINGS
A. TAB Conference: If requested by the Owner, conduct a TAB conference at [Project site] <Insert location> after approval of the TAB strategies and procedures plan to develop a mutual understanding of the details. Provide a minimum of [14] <Insert number> days' advance notice of scheduled meeting time and location.
1. Minimum Agenda Items:
a. The Contract Documents examination report.
b. The TAB plan.
c. Needs for coordination and cooperation of trades and subcontractors.
d. Proposed procedures for documentation and communication flow.
1.4 ACTION SUBMITTALS
A. LEED Submittals:
1. Air-Balance Report for Prerequisite IEQ 1: Documentation indicating that work complies with ASHRAE 62.1, Section 7.2.2 - "Air Balancing."
2. TAB Report for Prerequisite EA 2: Documentation indicating that work complies with ASHRAE/IESNA 90.1, Section 6.7.2.3 - "System Balancing."
1.5 INFORMATIONAL SUBMITTALS
A. Qualification Data: Within [30] [60] [90] <Insert number> days of Contractor's Notice to Proceed, submit documentation that the TAB specialist and this Project's TAB team members meet the qualifications specified in "Quality Assurance" Article.
B. Contract Documents Examination Report: Within 30 days of Contractor's Notice to Proceed, submit the Contract Documents review report as specified in Part 3.
C. Contract Documents Examination Report: Within [30] [60] [90] <Insert number> days of Contractor's Notice to Proceed, submit the Contract Documents review report as specified in Part 3.
D. Strategies and Procedures Plan: Within 60 days of Contractor's Notice to Proceed, submit TAB strategies and step-by-step procedures as specified in "Preparation" Article.
E. Strategies and Procedures Plan: Within [30] [60] [90] <Insert number> days of Contractor's Notice to Proceed, submit TAB strategies and step-by-step procedures as specified in "Preparation" Article.
F. System Readiness Checklists: Within 90 days of Contractor's Notice to Proceed, submit system readiness checklists as specified in "Preparation" Article.
G. System Readiness Checklists: Within [30] [60] [90] <Insert number> days of Contractor's Notice to Proceed, submit system readiness checklists as specified in "Preparation" Article.
H. Examination Report: Submit a summary report of the examination review required in "Examination" Article.
RYAN FOOD SERVICE VENTILATION HOOD REPLACEMENT - BID PACKAGE 2 23 0593 - 3
I. Certified TAB Reports: Submit four copies of reports prepared, as specified in this Section, on approved forms certified by TAB firm.
J. Certified TAB reports.
K. Sample report forms.
L. Instrument calibration reports, to include the following:
1. Instrument type and make.
2. Serial number.
3. Application.
4. Dates of use.
5. Dates of calibration.
1.6 QUALITY ASSURANCE
A. TAB Specialists Qualifications: Certified by [AABC][,] [NEBB] [or] [TABB].
1. TAB Field Supervisor: Employee of the TAB specialist and certified by [AABC] [NEBB] [or]
[TABB].
2. TAB Technician: Employee of the TAB specialist and certified by [AABC] [NEBB] [or] [TABB] as a TAB technician.
B. Instrumentation Type, Quantity, Accuracy, and Calibration: Comply with requirements in ASHRAE 111, Section 4, "Instrumentation."
C. ASHRAE Compliance: Applicable requirements in ASHRAE 62.1, Section 7.2.2 - "Air Balancing."
D. ASHRAE/IESNA Compliance: Applicable requirements in ASHRAE/IESNA 90.1, Section 6.7.2.3 - "System Balancing."
1.7 FIELD CONDITIONS
A. Owner Occupancy: Owner will occupy the site and existing building during TAB period. Cooperate with Owner during TAB operations to minimize conflicts with Owner's operations.
B. Full Owner Occupancy: Owner will occupy the site and existing building during entire TAB period.
Cooperate with Owner during TAB operations to minimize conflicts with Owner's operations.
C. Partial Owner Occupancy: Owner may occupy completed areas of building before Substantial Completion.
Cooperate with Owner during TAB operations to minimize conflicts with Owner's operations.
1.8 COORDINATION
A. Coordinate the efforts of factory-authorized service representatives for systems and equipment, HVAC controls installers, and other mechanics to operate HVAC systems and equipment to support and assist TAB activities.
RYAN FOOD SERVICE VENTILATION HOOD REPLACEMENT - BID PACKAGE 2 23 0593 - 4
B. Perform TAB after leakage and pressure tests on distribution systems have been satisfactorily completed.
1.9 PROJECT COMMISSIONING
A. Project is attempting to obtain Leed Certification and has an independent commissioning authority (CxA).
TAB Specialists for this project shall meet CxA requirements and shall coordinate with and participate in commissioning activities.
PART 2 - PRODUCTS (Not Applicable)
PART 3 - EXECUTION
3.1 TAB SPECIALISTS
A. Subject to compliance with requirements, [engage one of the following] [available TAB specialists that may be engaged include, but are not limited to, the following]:
B. Subject to compliance with requirements, engage one of the following:
1. Subject to compliance with requirements, provide the services of one of the following:
a. International Test and Balancing, Inc.
b. Quality Air Service, Inc.
c. Control Solutions.
d. Mechanical Testing Services, Inc.
e. Great Lakes Balancing.
f. Third Coast Testing and Balancing.
g. Integrity Test and Balance, Inc
h. Aerodynamics Inspecting Co.
i. Enviro-Aire/Total Balance Co.
j. Air Flow Testing Inc.
k. Absolute Balancing Co.
l. Hi-Tech Testing and Balancing Inc.
m. Pro-MEC Engineering Services, Inc
n. Kinetix Testing and Commissioning
o. Environmental Test and Balancing, Inc.
3.2 EXAMINATION
A. Examine the Contract Documents to become familiar with Project requirements and to discover conditions in systems designs that may preclude proper TAB of systems and equipment.
B. Examine installed systems for balancing devices. Verify that locations of these balancing devices are applicable for intended purpose and are accessible.
C. Examine installed systems for balancing devices[, such as test ports, gage cocks, thermometer wells, flow-control devices, balancing valves and fittings, and manual volume dampers]. Verify that locations of these balancing devices are applicable for intended purpose and are accessible.
RYAN FOOD SERVICE VENTILATION HOOD REPLACEMENT - BID PACKAGE 2 23 0593 - 5
D. Examine the approved submittals for HVAC systems and equipment.
E. Examine design data including HVAC system descriptions, statements of design assumptions for environmental conditions and systems output, and statements of philosophies and assumptions about HVAC system and equipment controls.
F. Examine[ ceiling plenums][ and][ underfloor air plenums] used for supply, return, or relief air to verify that they are properly separated from adjacent areas. Verify that penetrations in plenum walls are sealed and fire-stopped if required.
G. Examine[ ceiling plenums][ and][ underfloor air plenums] used for supply, return, or relief air to verify that they are properly separated from adjacent areas. Verify that penetrations in plenum walls are sealed and fire-stopped if required.
H. Examine equipment performance data.
I. Examine equipment performance data[ including fan and pump curves].
1. Relate performance data to Project conditions and requirements, including system effects that can create undesired or unpredicted conditions that cause reduced capacities in all or part of a system.
2. Calculate system-effect factors to reduce performance ratings of HVAC equipment when installed under conditions different from the conditions used to rate equipment performance. To calculate system effects for air systems, use tables and charts found in AMCA 201, "Fans and Systems," or in SMACNA's "HVAC Systems - Duct Design." Compare results with the design data and installed conditions.
J. Examine system and equipment installations and verify that field quality-control testing, cleaning, and adjusting specified in individual Sections have been performed.
K. Examine test reports specified in individual system and equipment Sections.
L. Examine HVAC equipment and verify that equipment with functioning controls is ready for operation.
M. Examine HVAC equipment and verify that[ bearings are greased, belts are aligned and tight, filters are clean, and] equipment with functioning controls is ready for operation.
N. Examine terminal units[, such as variable-air-volume boxes,] and verify that they are accessible and their controls are connected and functioning.
O. Examine terminal units[, such as variable-air-volume boxes,] and verify that they are accessible and their controls are connected and functioning.
P. Examine strainers. Verify that startup screens have been replaced by permanent screens with indicated perforations.
Q. Examine control valves for proper installation for their intended function of throttling, diverting, or mixing fluid flows.
R. Examine heat-transfer coils for correct piping connections and for clean and straight fins.
S. Examine system pumps to ensure absence of entrained air in the suction piping.
RYAN FOOD SERVICE VENTILATION HOOD REPLACEMENT - BID PACKAGE 2 23 0593 - 6
T. Examine operating safety interlocks and controls on HVAC equipment.
U. Report deficiencies discovered before and during performance of TAB procedures. Observe and record system reactions to changes in conditions. Record default set points if different from indicated values.
3.3 PREPARATION
A. Prepare a TAB plan that includes the following:
1. Equipment and systems to be tested.
2. Strategies and step-by-step procedures for balancing the systems.
3. Instrumentation to be used.
4. Sample forms with specific identification for all equipment.
B. Perform system-readiness checks of HVAC systems and equipment to verify system readiness for TAB work. Include, at a minimum, the following:
1. Airside:
a. Verify that leakage and pressure tests on air distribution systems have been satisfactorily completed.
b. Duct systems are complete with terminals installed.
c. Volume, smoke, and fire dampers are open and functional.
d. Clean filters are installed.
e. Fans are operating, free of vibration, and rotating in correct direction.
f. [Variable-frequency controllers' ]startup is complete and safeties are verified.
g. Automatic temperature-control systems are operational.
h. Ceilings are installed.
i. Windows and doors are installed.
j. Suitable access to balancing devices and equipment is provided.
2. Hydronics:
a. Verify leakage and pressure tests on water distribution systems have been satisfactorily completed.
b. Piping is complete with terminals installed.
c. Water treatment is complete.
d. Systems are flushed, filled, and air purged.
e. Strainers are pulled and cleaned.
f. Control valves are functioning per the sequence of operation.
g. Shutoff and balance valves have been verified to be 100 percent open.
h. Pumps are started and proper rotation is verified.
i. Pump gage connections are installed directly at pump inlet and outlet flanges or in discharge and suction pipe prior to valves or strainers.
j. [Variable-frequency controllers' ]startup is complete and safeties are verified.
k. Suitable access to balancing devices and equipment is provided.
3.4 GENERAL PROCEDURES FOR TESTING AND BALANCING
A. Perform testing and balancing procedures on each system according to the procedures contained in AABC's "National Standards for Total System Balance"; ASHRAE 111; NEBB's "Procedural Standards for
RYAN FOOD SERVICE VENTILATION HOOD REPLACEMENT - BID PACKAGE 2 23 0593 - 7
Testing, Adjusting, and Balancing of Environmental Systems"; SMACNA's "HVAC Systems - Testing, Adjusting, and Balancing"; and in this Section.
B. Perform testing and balancing procedures on each system according to the procedures contained in [AABC's "National Standards for Total System Balance"] [ASHRAE 111] [NEBB's "Procedural Standards for Testing, Adjusting, and Balancing of Environmental Systems"] [SMACNA's "HVAC Systems - Testing, Adjusting, and Balancing"] and in this Section.
C. Cut insulation, ducts, pipes, and equipment cabinets for installation of test probes to the minimum extent necessary for TAB procedures.
D. Cut insulation, ducts, pipes, and equipment cabinets for installation of test probes to the minimum extent necessary for TAB procedures.
1. After testing and balancing, patch probe holes in ducts with same material and thickness as used to construct ducts.
2. After testing and balancing, install test ports and duct access doors that comply with requirements in Section 23 3300 "Air Duct Accessories."
3. Install and join new insulation that matches removed materials. Restore insulation, coverings, vapor barrier, and finish according to Section 23 0700 "HVAC Insulation."
4. Install and join new insulation that matches removed materials. Restore insulation, coverings, vapor barrier, and finish according to Section 23 0713 "Duct Insulation," Section 23 0716 "HVAC Equipment Insulation," and Section 23 0719 "HVAC Piping Insulation."
E. Mark equipment and balancing devices, including damper-control positions, valve position indicators, and similar controls and devices, with paint or other suitable, permanent identification material to show final settings.
F. Mark equipment and balancing devices, including damper-control positions, valve position indicators, fan-speed-control levers, and similar controls and devices, with paint or other suitable, permanent identification material to show final settings.
G. Take and report testing and balancing measurements in inch-pound (IP) units.
H. Take and report testing and balancing measurements in [inch-pound (IP)] [and] [metric (SI)] units.
3.5 GENERAL PROCEDURES FOR BALANCING AIR SYSTEMS
A. Prepare test reports for both fans and outlets. Obtain manufacturer's outlet factors and recommended testing procedures. Cross-check the summation of required outlet volumes with required fan volumes.
B. Prepare schematic diagrams of systems' "as-built" duct layouts.
C. For [variable-air-volume systems], develop a plan to simulate diversity.
D. Determine the best locations in main and branch ducts for accurate duct-airflow measurements.
E. Check airflow patterns from the outdoor-air louvers and dampers and the return- and exhaust-air dampers through the supply-fan discharge and mixing dampers.
F. Locate start-stop and disconnect switches, electrical interlocks, and motor starters.
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G. Verify that motor starters are equipped with properly sized thermal protection.
H. Check dampers for proper position to achieve desired airflow path.
I. Check for airflow blockages.
J. Check condensate drains for proper connections and functioning.
K. Check for proper sealing of air-handling-unit components.
L. Verify that air duct system is sealed as specified in Section 23 3113 "Metal Ducts."
3.6 PROCEDURES FOR MOTORS
A. Motors 1/2 HP and Larger: Test at final balanced conditions and record the following data:
1. Manufacturer's name, model number, and serial number.
2. Motor horsepower rating.
3. Motor rpm.
4. Phase and hertz.
5. Nameplate and measured voltage, each phase.
6. Nameplate and measured amperage, each phase.
7. Starter size and thermal-protection-element rating.
8. Service factor and frame size.
B. Motors Driven by [Variable-Frequency Controllers]: Test manual bypass of controller to prove proper operation.
3.7 PROCEDURES FOR COMMERCIAL KITCHEN HOODS
A. Measure, adjust, and record the airflow of each kitchen hood. For kitchen hoods designed with integral makeup air, measure and adjust the exhaust and makeup airflow. Measure airflow by duct Pitot-tube traverse. If a duct Pitot-tube traverse is not possible, provide an explanation in the report of the reason(s) why and also the reason why the method used was chosen.
1. Install welded test ports in the sides of the exhaust duct for the duct Pitot-tube traverse. Install each test port with a threaded cap that is liquid tight.
B. After balancing is complete, do the following:
1. Measure and record the static pressure at the hood exhaust-duct connection.
2. Measure and record the hood face velocity. Make measurements at multiple points across the face of the hood. Perform measurements at a maximum of 12 inches between points and between any point and the perimeter. Calculate the average of the measurements recorded. Verify that the hood average face velocity complies with the Contract Documents and governing codes.
3. Check the hood for capture and containment of smoke using a smoke emitting device. Observe the smoke pattern. Make adjustments to room airflow patterns to achieve optimum results.
C. Visually inspect the hood exhaust duct throughout its entire length in compliance with authorities having jurisdiction. Begin at the hood connection and end at the point it discharges outdoors. Report findings.
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1. Check duct slopes as required.
2. Verify that duct access is installed as required.
3. Verify that point of termination is as required.
4. Verify that duct air velocity is within the range required.
5. Verify that duct is within a fire-rated enclosure.
D. Report deficiencies.
3.8 PROCEDURES FOR EXHAUST HOODS
A. Measure, adjust, and record the airflow of each exhaust hood. Measure airflow by duct Pitot-tube traverse. If a duct Pitot-tube traverse is not possible, explain why, in the report, and explain the test method used.
B. After balancing is complete, do the following:
1. Measure and record the static pressure at the hood exhaust-duct connection.
2. Check the hood for capture and containment of smoke using a smoke emitting device. Observe the smoke pattern. Make adjustments to achieve optimum results.
3.9 PROCEDURES FOR SPACE PRESSURIZATION MEASUREMENTS AND ADJUSTMENTS
A. Before testing for space pressurization, observe the space to verify the integrity of the space boundaries.
Verify that windows and doors are closed and applicable safing, gaskets, and sealants are installed.
Report deficiencies and postpone testing until after the reported deficiencies are corrected.
B. Measure, adjust, and record the pressurization of each room, each zone, and each building by adjusting the supply, return, and exhaust airflows to achieve the indicated conditions.
C. Measure space pressure differential where pressure is used as the design criteria, and measure airflow differential where differential airflow is used as the design criteria for space pressurization.
1. For pressure measurements, measure and record the pressure difference between the intended spaces at the door with all doors in the space closed. Record the high-pressure side, low-pressure side, and pressure difference between each adjacent space.
2. For applications with cascading levels of space pressurization, begin in the most critical space and work to the least critical space.
3. Test room pressurization first, then zones, and finish with building pressurization.
D. To achieve indicated pressurization, set the supply airflow to the indicated conditions and adjust the exhaust and return airflow to achieve the indicated pressure or airflow difference.
E. For spaces with pressurization being monitored and controlled automatically, observe and adjust the controls to achieve the desired set point.
1. Compare the values of the measurements taken to the measured values of the control system instruments and report findings.
2. Check the repeatability of the controls by successive tests designed to temporarily alter the ability to achieve space pressurization. Test overpressurization and underpressurization, and observe and report on the system's ability to revert to the set point.
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3. For spaces served by variable-air-volume supply and exhaust systems, measure space pressurization at indicated airflow and minimum airflow conditions.
F. In spaces that employ multiple modes of operation, such as normal mode and emergency mode or occupied mode and unoccupied mode, measure, adjust, and record data for each operating mode.
G. Record indicated conditions and corresponding initial and final measurements. Report deficiencies.
3.10 PROCEDURES FOR TESTING, ADJUSTING, AND BALANCING EXISTING SYSTEMS
A. Prior to demolition of air and water HVAC distributions systems and equipment, measure and record existing air and water flow conditions for all equipment, ductwork and hydronic piping systems serving area being modified during the project.
1. Measure and record the operating speeds and flow rates of existing equipment.
2. Measure and record the flow rates at interconnection points between existing and new work.
3. Measure motor voltage and amperage of effected equipment. Compare the values to motor nameplate information.
4. Report on the operating condition of the equipment and the results of the measurements taken.
Report deficiencies.
B. After revisions are complete, measure all the HVAC air and water systems modified and restore the systems to their original or scheduled capacities.
1. Compare the indicated flow rates of the renovated work to the measured flow rates and determine the new equipment flow rates.
2. Verify that the indicated flows of the renovated work result in conditions that are within the acceptable limits defined by equipment manufacturer.
3. Re-measure, record and verify the flow rates at interconnection points between existing and new work.
4. If calculations increase or decrease the flow rates by more than 5 percent, make equipment adjustments to achieve the calculated airflow and water flow rates. If 5 percent or less, equipment adjustments are not required.
5. Balance each affect branch and main.
3.11 TOLERANCES
A. Set HVAC system's flow rates within the following tolerances:
1. Supply, Return, and Exhaust Fans and Equipment with Fans: Plus or minus 10 percent.
2. Air Outlets and Inlets: Plus or minus 10 percent.
3. Heating-Water Flow Rate: Plus or minus 10 percent.
4. [Cooling-Water Flow Rate]: Plus or minus 10 percent.
B. Maintaining pressure relationships as designed shall have priority over the tolerances specified above.
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3.12 PROGRESS REPORTING
A. Initial Construction-Phase Report: Based on examination of the Contract Documents as specified in "Examination" Article, prepare a report on the adequacy of design for systems balancing devices.
Recommend changes and additions to systems balancing devices to facilitate proper performance measuring and balancing. Recommend changes and additions to HVAC systems and general construction to allow access for performance measuring and balancing devices.
3.13 FINAL REPORT
A. General: Prepare a certified written report; tabulate and divide the report into separate sections for tested systems and balanced systems.
1. Include a certification sheet at the front of the report's binder, signed and sealed by the certified testing and balancing engineer.
2. Include a list of instruments used for procedures, along with proof of calibration.
3. Certify validity and accuracy of field data.
B. Final Report Contents: In addition to certified field-report data, include the following:
1. Equipment operating curves.
2. Pump curves.
3. Fan curves.
4. Manufacturers' test data.
5. Field test reports prepared by system and equipment installers.
6. Other information relative to equipment performance; do not include Shop Drawings and Product
Data.
C. General Report Data: In addition to form titles and entries, include the following data:
1. Title page.
2. Name and address of the TAB specialist.
3. Project name.
4. Project location.
5. Architect's name and address.
6. Engineer's name and address.
7. Contractor's name and address.
8. Report date.
9. Signature of TAB supervisor who certifies the report.
10. Table of Contents with the total number of pages defined for each section of the report. Number each page in the report.
11. Summary of contents including the following:
a. Indicated versus final performance.
b. Notable characteristics of systems.
c. Description of system operation sequence if it varies from the Contract Documents.
12. Nomenclature sheets for each item of equipment.
13. Data for terminal units, including manufacturer's name, type, size, and fittings.
14. Notes to explain why certain final data in the body of reports vary from indicated values.
15. Test conditions for fans and pump performance forms including the following:
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a. Settings for outdoor-, return-, and exhaust-air dampers.
b. Conditions of filters.
c. Cooling coil, wet- and dry-bulb conditions.
d. Face and bypass damper settings at coils.
e. Fan drive settings including settings and percentage of maximum pitch diameter.
f. Inlet vane settings for variable-air-volume systems.
g. Settings for supply-air, static-pressure controller.
h. Other system operating conditions that affect performance.
D. System Diagrams: Include schematic layouts of air and hydronic distribution systems. Present each system with single-line diagram and include the following:
1. Quantities of outdoor, supply, return, and exhaust airflows.
2. Water flow rates.
3. Water[ and steam] flow rates.
4. Duct, outlet, and inlet sizes.
5. Pipe and valve sizes and locations.
6. Terminal units.
7. Balancing stations.
8. Position of balancing devices.
E. Air-Handling-Unit Test Reports: For air-handling units with coils, include the following:
1. Unit Data:
a. Unit identification.
b. Location.
c. Make and type.
d. Model number and unit size.
e. Manufacturer's serial number.
f. Unit arrangement and class.
g. Discharge arrangement.
h. Sheave make, size in inches, and bore.
i. Center-to-center dimensions of sheave and amount of adjustments in inches.
j. Number, make, and size of belts.
k. Number, type, and size of filters.
l. Variable frequency drive information.
2. Motor Data:
a. Motor make, and frame type and size.
b. Horsepower and rpm.
c. Volts, phase, and hertz.
d. Full-load amperage and service factor.
e. Sheave make, size in inches, and bore.
f. Center-to-center dimensions of sheave and amount of adjustments in inches.
3. Test Data (Indicated and Actual Values):
a. Total airflow rate in cfm.
b. Total system static pressure in inches wg.
c. Fan rpm.
d. Discharge static pressure in inches wg.
e. Filter static-pressure differential in inches wg.
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f. Preheat-coil static-pressure differential in inches wg.
g. Cooling-coil static-pressure differential in inches wg.
h. Heating-coil static-pressure differential in inches wg.
i. Outdoor airflow in cfm.
j. Return airflow in cfm.
k. Outdoor-air damper position.
l. Return-air damper position.
m. Variable frequency drive information.
F. Apparatus-Coil Test Reports:
1. Coil Data:
a. System identification.
b. Location.
c. Coil type.
d. Number of rows.
e. Fin spacing in fins per inch o.c.
f. Make and model number.
g. Face area in sq. ft..
h. Tube size in NPS.
i. Tube and fin materials.
j. Circuiting arrangement.
2. Test Data (Indicated and Actual Values):
a. Airflow rate in cfm.
b. Average face velocity in fpm.
c. Air pressure drop in inches wg.
d. Outdoor-air, wet- and dry-bulb temperatures in deg F.
e. Return-air, wet- and dry-bulb temperatures in deg F.
f. Entering-air, wet- and dry-bulb temperatures in deg F.
g. Leaving-air, wet- and dry-bulb temperatures in deg F.
h. Water flow rate in gpm.
i. Water pressure differential in feet of head or psig.
j. Entering-water temperature in deg F.
k. Leaving-water temperature in deg F.
l. Refrigerant expansion valve and refrigerant types.
m. Refrigerant suction pressure in psig.
n. Refrigerant suction temperature in deg F.
G. Energy Recovery Wheel Reports:
1. Unit Data:
a. Unit identification.
b. Location.
c. Service.
d. Make and type.
e. Model and serial numbers.
2. Test Data (Indicated and Actual Values):
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a. Total exhaust airflow rate in cfm(L/s).
b. Purge exhaust airflow rate in cfm(L/s).
c. Outside airflow rate in cfm(L/s).
d. Total exhaust fan static pressure in inches wg(Pa).
e. Total outside-air fan static pressure in inches wg(Pa).
f. Pressure drop on each side of heat exchanger in inches wg(Pa).
g. Exhaust air temperature entering in deg F(deg C).
h. Exhaust air temperature leaving in deg F(deg C).
i. Outside-air temperature entering in deg F(deg C).
j. Outside-air temperature leaving in deg F(deg C).
k. Calculate sensible and total heat capacity of each airstream in MBh(kW).
H. Fan Test Reports: For supply, return, and exhaust fans, include the following:
1. Fan Data:
a. System identification.
b. Location.
c. Make and type.
d. Model number and size.
e. Manufacturer's serial number.
f. Arrangement and class.
g. Sheave make, size in inches, and bore.
h. Center-to-center dimensions of sheave and amount of adjustments in inches.
2. Motor Data:
a. Motor make, and frame type and size.
b. Horsepower and rpm.
c. Volts, phase, and hertz.
d. Full-load amperage and service factor.
e. Sheave make, size in inches, and bore.
f. Center-to-center dimensions of sheave, and amount of adjustments in inches.
g. Number, make, and size of belts.
3. Test Data (Indicated and Actual Values):
a. Total airflow rate in cfm.
b. Total system static pressure in inches wg.
c. Fan rpm.
d. Discharge static pressure in inches wg.
e. Suction static pressure in inches wg.
f. Variable frequency drive setpoint.
I. Duct Traverse Reports: Include a diagram with a grid representing the duct cross-section and record the following:
1. Report Data:
a. System and air-handling-unit number.
b. Location and zone.
c. Traverse air temperature in deg F.
d. Duct static pressure in inches wg.
e. Duct size in inches.
f. Duct area in sq. ft..
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g. Indicated airflow rate in cfm.
h. Indicated velocity in fpm.
i. Actual airflow rate in cfm.
j. Actual average velocity in fpm.
k. Barometric pressure in psig.
J. Air-Terminal-Device Reports:
1. Unit Data:
a. System and air-handling unit identification.
b. Location and zone.
c. Apparatus used for test.
d. Area served.
e. Make.
f. Number from system diagram.
g. Type and model number.
h. Size.
i. Effective area in sq. ft..
2. Test Data (Indicated and Actual Values):
a. Airflow rate in cfm.
b. Air velocity in fpm.
c. Preliminary airflow rate as needed in cfm.
d. Preliminary velocity as needed in fpm.
e. Final airflow rate in cfm.
f. Final velocity in fpm.
g. Space temperature in deg F.
K. System-Coil Reports: For reheat coils and water coils of terminal units, include the following:
1. Unit Data:
a. System and air-handling-unit identification.
b. Location and zone.
c. Room or riser served.
d. Coil make and size.
e. Flowmeter type.
2. Test Data (Indicated and Actual Values):
a. Airflow rate in cfm.
b. Entering-water temperature in deg F.
c. Leaving-water temperature in deg F.
d. Water pressure drop in feet of head or psig.
e. Entering-air temperature in deg F.
f. Leaving-air temperature in deg F.
L. Packaged Chiller Reports:
1. Unit Data:
a. Unit identification.
b. Make and model number.
c. Manufacturer's serial number.
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d. Refrigerant type and capacity in gal..
e. Starter type and size.
f. Starter thermal protection size.
g. Compressor make and model number.
h. Compressor manufacturer's serial number.
2. Water-Cooled Condenser Test Data (Indicated and Actual Values):
a. Refrigerant pressure in psig.
b. Refrigerant temperature in deg F.
c. Entering-water temperature in deg F.
d. Leaving-water temperature in deg F.
e. Entering-water pressure in feet of head or psig.
f. Water pressure differential in feet of head or psig.
3. Air-Cooled Condenser Test Data (Indicated and Actual Values):
a. Refrigerant pressure in psig.
b. Refrigerant temperature in deg F.
c. Entering- and leaving-air temperature in deg F.
4. Evaporator Test Reports (Indicated and Actual Values):
a. Refrigerant pressure in psig.
b. Refrigerant temperature in deg F.
c. Entering-water temperature in deg F.
d. Leaving-water temperature in deg F.
e. Entering-water…
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