1. 23 00 00 - Mechanical Specifications.pdf

NCS2401 NCSD – RPHS – CHILLER REPLACEMENT SECTION 23 00 00

MECHANICAL SPECIFICATIONS INDEX

23 05 13 Motor Requirements for HVAC Equipment

23 05 19 Meters and Gauges for HVAC Piping

23 05 23 General Duty Valves for HVAC Piping

23 05 29 Hangers and Supports for HVAC Piping and Equipment

23 05 53 Identification for HVAC Piping and Equipment

23 05 93 Testing, Adjusting and Balancing for HVAC

23 07 00 HVAC Insulation

23 09 00 Instrumentation and Control for HVAC

23 20 00 HVAC Piping and Equipment

23 21 00 HVAC Pumps

23 64 00 Packaged Air Cooled Chillers

NCS2401 NCSD – RPHS – CHILLER REPLACEMENT SECTION 23 05 13

MOTOR REQUIREMENTS FOR HVAC EQUIPMENT

PART 1 - GENERAL

1.1 SUMMARY

A. Work included: Providing motor starters and variable frequency drives (VFD's) as specified.

1.2 SUBMITTALS

A. Provide submittals in accordance with Section 23 00 00.

B. Submittals shall include manufacturer's catalog or technical data substantiating performance required.

1.3 OPERATION AND MAINTENANCE DATA

A. Provide O&M data in accordance with Section 23 00 00.

B. O&M data shall include:

1. Manufacturer's literature.

2. Maintenance instructions.

PART 2 - PRODUCTS

2.1 MANUFACTURERS

A. Motor Starters: Same as switchgear, except packaged equipment with motor starters’ factory installed.

B. Variable Frequency Drives: ABB AHC Series or owner approved equal.

2.2 DESCRIPTION

A. Motor Starters

1. Furnish starters with overload and undervoltage protection for each leg.

2. Furnish overloads of the ambient compensation type.

3. Coordinate with control contractor to provide required coil voltage and number and type of auxiliary contacts.

4. Provide hand-off-automatic switch on cover of starter enclosure.

5. Provide control transformers with starters to produce 120V control power as required. Each control transformer shall be fused.

B. Variable Frequency Drives

1. The VFD package as specified herein shall be enclosed in a UL Listed Type 12 enclosure, completely assembled and tested by the manufacturer in an ISO9001 facility. The VFD tolerated voltage window shall allow the VFD to operate from a line of +30% nominal, and -

35% nominal voltage as a minimum. UL Type 12 means the enclosure has been tested by UL

Standards, not NEMA.

2. All VFD's shall have the following standard features:

a. The VFD shall have integral 5% impedance line reactors to reduce the harmonics to the power line and to add protection from AC line transients. The 5% impedance may be from dual (positive and negative DC bus) reactors, or 5% AC line reactors. VFD’s with only one DC reactor shall add AC line reactors. This increased impedance lower harmonic distortion (Vthd) meeting IEEE-519 guidelines.

b. The VFD shall include a coordinated AC transient protection system consisting of 4-

120 joule rated MOV’s (phase to phase and phase to ground), a capacitor clamp, and

5% impedance reactors. MOV's protects against transients that would trip a VFD off line or cause serious damage.

3. All VFD's to have the following adjustments: Two (2) PID Setpoint controllers shall be standard in the drive, allowing pressure or flow signals to be connected to the VFD, using the microprocessor in the VFD for the closed loop control. The VFD shall have 250 ma of 24

VDC auxiliary power and be capable of loop powering a transmitter supplied by others. The

PID setpoint shall be adjustable from the VFD keypad, analog inputs, or over the communications bus. There shall be two parameter sets for the first PID that allow the sets to be switched via a digital input, serial communications or from the keypad for night setback, summer/winter setpoints, etc. There shall be an independent, second PID loop that can utilize the second analog input and modulate one of the analog outputs to maintain setpoint of an independent process (i.e. valves, dampers, etc.). All setpoints, process variables, etc. to be accessible from the serial communication network. The setpoints shall be set in Engineering units and not require a percentage of the transducer input. Allows complete control of a system or process.

4. The VFD shall include a fireman’s override input. Upon receipt of a contact closure from the fireman’s control station, the VFD shall operate at an adjustable preset speed. The mode shall override all other inputs (analog/digital, serial communication, and all keypad commands) and force the motor to run at the adjustable, preset speed. “Override Mode” shall be displayed on the keypad. Upon removal of the override signal, the VFD shall resume normal operation.

5. Serial Communications

a. The VFD shall have an RS-485 port as standard. The standard protocols shall be

Modbus, Johnson Controls N2 bus, and Siemens Building Technologies FLN.

Optional protocols for LonWorks, BACnet, Profibus, Ethernet, and DeviceNet shall be available. Each individual drive shall have the protocol in the base VFD. The use of third party gateways and multiplexers is not acceptable. All protocols shall be

“certified” by the governing authority. Use of non-certified protocols is not allowed.

If a gateway must be used, each drive must have its own gateway in order to prevent the entire drive system from dropping off line.

b. Serial communication capabilities shall include, but not be limited to; run-stop control, speed set adjustment, proportional/integral/derivative PID control adjustments, current limit, accel/decel time adjustments, and lock and unlock the keypad. The drive shall have the capability of allowing the DDC to monitor feedback such as process variable feedback, output speed / frequency, current (in amps), % torque, power (kW), kilowatt hours (resettable), operating hours (resettable), and drive temperature. The DDC shall also be capable of monitoring the VFD relay output status, digital input status, and all analog input and analog output values. All diagnostic warning and fault information shall be transmitted over the serial communications bus. Remote VFD fault reset shall be possible. The following additional status indications and settings shall be transmitted over the serial communications bus – keypad “Hand” or “Auto” selected, bypass selected, the ability to change the PID setpoint, and the ability to force the unit to bypass (if bypass is specified). The DDC system shall also be able to monitor if the motor is running in the VFD mode or bypass mode (if bypass is specified) over serial communications. A minimum of 15 field parameters shall be capable of being monitored.

c. The VFD shall allow the DDC to control the drive’s digital and analog outputs via the serial interface. This control shall be independent of any VFD function. For example, the analog outputs may be used for modulating chilled water valves or cooling tower bypass valves. The drive’s digital (relay) outputs may be used to actuate a damper, open a valve or control any other device that requires a maintained contact for operation. In addition, all of the drive’s digital and analog inputs shall be capable of being monitored by the DDC system.

d. The VFD shall include an independent PID loop for customer use. The independent

PID loop may be used for cooling tower bypass value control, chilled water value control, etc. Both the VFD control PID loop and the independent PID loop shall continue functioning even if the serial communications connection is lost. The VFD shall keep the last good set-point command and last good DO & AO commands in memory in the event the serial communications connection is lost.

6. EMI / RFI filters. All VFD’s shall include EMI/RFI filters. The onboard filters shall allow the

VFD assembly to be CE Marked and the VFD shall meet product standard EN 61800-3 for the

First Environment restricted level. Complies with 1st Environment and exceeds FCC guidelines with motor cables less than 100 feet (30 meters)

7. All VFD’s through 50HP shall be protected from input and output power mis-wiring. The VFD shall sense this condition and display an alarm on the keypad. Prevents damage to the VFD when the electrical contractor wires the input power to motor terminals.

8. OPTIONAL FEATURES – Optional features to be furnished and mounted by the drive manufacturer. All optional features shall be UL Listed by the drive manufacturer as a complete assembly and carry a UL508 label.

a. Door interlocked, padlockable circuit breaker that will disconnect all input power from the drive and all internally mounted options.

b. Fused VFD only disconnect (service switch). Fast acting fuses exclusive to the VFD

– fast acting fuses allow the VFD to disconnect from the line prior to clearing upstream branch circuit protection, maintaining bypass capability. Bypass designs, which have no such fuses, or that incorporate fuses common to both the VFD and the bypass will not be accepted. Three contactor bypass schemes are not acceptable.

c. The drive / bypass shall provide single-phase motor protection in both the VFD and bypass modes.

d. The following operators shall be provided:

1) Bypass Hand-Off-Auto

2) Drive mode selector

3) Bypass mode selector

4) Bypass fault reset

e. The following indicating lights (LED type) shall be provided. A test mode or push to test feature shall be provided.

1) Power-on (Ready)

2) Run enable (safeties) open

3) Drive mode select damper opening

4) Bypass mode selected

5) Drive running

6) Bypass running

7) Drive fault and bypass fault

8) Bypass H-O-A mode

9) Automatic transfer to bypass selected

10) Safety open

11) Damper opening

12) Damper end-switch made

f. The following relay (form C) outputs from the bypass shall be provided:

1) System started

2) System running

3) Bypass override enabled

4) Drive fault

5) Bypass fault (motor overload or underload (broken belt))

6) Bypass H-O-A position

g. The digital inputs for the system shall accept 24V or 115VAC (selectable). The bypass shall incorporate internally sourced power supply and not require an external control power source.

h. Customer Interlock Terminal Strip – provide a separate terminal strip for connection of freeze, fire, smoke contacts, and external start command. All external safety interlocks shall remain fully functional whether the system is in Hand, Auto, or

Bypass modes (not functional in Fireman’s Override 2). The remote start/stop contact shall operate in VFD and bypass modes.

i. Dedicated digital input that will transfer motor from VFD mode to bypass mode upon dry contact closure for fireman’s override. Two modes of operation are required.

1) One mode forces the motor to bypass operation and overrides both the VFD and bypass H-O-A switches and forces the motor to operate across the line

(test mode). The system will only respond to the digital inputs and motor protections.

2) The second fireman’s override mode remains as above, but will also defeat the overload and single-phase protection for bypass and ignore all keypad and digital inputs to the system (run until destruction).

j. The VFD shall include a “run permissive circuit” that will provide a normally open contact whenever a run command is provided (local or remote start command in VFD or bypass mode). The VFD system (VFD or bypass) shall not operate the motor until it receives a dry contact closure from a damper or valve end-switch. When the VFD system safety interlock (fire detector, freezestat, high static pressure switch, etc) opens, the motor shall coast to a stop and the run permissive contact shall open, closing the damper or valve.

k. Class 20 or 30 (selectable) electronic single phase and motor overload protection shall be included.

l. There shall be an internal switch to select manual or automatic bypass.

m. There shall be an adjustable current sensing circuit for the bypass to provide loss of load indication (broken belt) when in the bypass mode.

PART 3 - EXECUTION

3.1 INSTALLATION

A. Motor Starters:

1. Provide motor starters for all mechanical equipment noted on the contract documents as required. Starters to be factory mounted by the equipment manufacturer when available.

2. Installation of remote starters is specified under the Electrical Division.

3. Provide additional properly sized overloads as required.

B. Variable Frequency Drives:

1. Install the drive in accordance with the recommendations of the VFD manufacturer as outlined in the installation manual.

2. Certified factory start-up shall be provided for each drive by a factory authorized service center. A certified start-up form shall be filled out for each drive with a copy provided to the owner, and a copy kept on file at the manufacturer.

3. Perform harmonic measurements at the point where the utility feeds multiple loads (PCC) to verify compliance with the latest revision of IEEE519-1992. Provide a report of the voltage

THD and current TDD for Engineer’s review prior to substantial completion. Provide labor, materials, and protection as needed to access the test points. The readings shall be taken with all drives and other loads at full load, or as close to this as field conditions allow.

3.2 COMMISSIONING

A. The equipment and systems referenced in this section are to be commissioned per Section 23 08 00 –

Commissioning of HVAC. The contractor has specific responsibilities for scheduling, coordination, startup, test development, testing and documentation. Coordinate all commissioning activities with the

Commissioning Authority.

END OF SECTION

NCS2401 NCSD – RPHS – CHILLER REPLACEMENT SECTION 23 05 19

METERS AND GAUGES FOR HVAC PIPING

PART 1 - GENERAL

1.1 DESCRIPTION

A. This section prescribes the requirements for materials and methods of installation of gauges and instruments specified, shown on the drawings or required by good practice.

1.2 SUBMITTALS

A. Manufacturer's catalog or technical data substantiating

PART 2 - PRODUCTS

2.1 THERMOMETERS

A. Manufacturers: Marsh, Ashcroft, Tel-Tru, or approved equal. Marsh used as basis for selection.

B. Type: Industrial thermometer, adjustable socket, molded nylon case, 9-inch scale length, 30 to 240 F.

range for hot water.

2.2 PRESSURE GAUGES

A. Manufacturers: Marsh, Ashcroft, Tel-Tru, or approved equal. Marsh used as basis for selection.

B. Type: Figure J4046, 2-1/2 inch case size, 0-60 PSI, bottom stem connection, painted steel case.

Provide shutoff valve in gauge tapping.

PART 3 - EXECUTION

3.1 INSTALLATION

A. Install all gauges and thermometers where shown on the drawings and in accordance with manufacturer's recommendations. Pressure gage piping connections to be made with materials in conformance to the requirements of the contract specifications and compatible with the gage materials.

No dissimilar metal-to-metal contact is allowed.

B. Pressure gauge and thermometers shall be installed or located to be easily read from the floor.

3.2 COMMISSIONING

A. The equipment and systems referenced in this section are to be commissioned per Section 23 08 00 –

HVAC System Commissioning Requirements.

B. The contractor has specific responsibilities for scheduling, coordination, startup, test development, testing and documentation. Coordinate all commissioning activities with the Commissioning Authority.

NCS2401 NCSD – RPHS – CHILLER REPLACEMENT SECTION 23 05 23

GENERAL DUTY VALVES FOR HVAC PIPING

PART 1 - GENERAL

1.1 SUMMARY

A. Work included: Providing of all required valves, cocks and faucets.

1.2 SUBMITTALS

A. Provide submittals in accordance with Section 23 00 00.

B. Submittals shall include manufacturer's catalog or technical data showing performance, dimensions, materials of construction and recommended methods of installation.

1.3 OPERATION AND MAINTENANCE DATA

A. Provide O&M data in accordance with Section 23 00 00.

B. O&M data will include manufacturer's literature and Maintenance instructions.

PART 2 - PRODUCTS

2.1 MANUFACTURERS

A. Ball Valves, Butterfly Valves, Check Valves, Natural Gas Valves and Drain Valves: Hammond, Stockham, Nibco, Milwaukee or approved equal. Hammond used as basis of selection.

B. Natural Gas Valves: Hammond, Pegler, Jomar, Leonard or approved equal.

2.2 DESCRIPTION

A. Ball Valves (Heating and Chilled Water Service): Ball valves for heating water service shall be Figure

8501, 150 WSP / 600 WOG, 400 PSI non-shock cold water rated solder type 2-piece bronze body ball valve with full port / large port, threaded ends, blow out proof stem, RTFE seats and PTFE packing, free floating chrome plated brass ball.

B. Butterfly Valves (Heating and Chilled Water Service): 5200 Series with heavy duty construction, bubble-tight seal, lug body, extended neck, streamline disc, bi-directional flow, field replaceable seat, 200 PSI water rating.

C. Horizontal Swing Check Valves: Figure IB940, 125 lb. screwed bronze swing check valve with renewable Teflon composition disc.

D. Vertical / Spring and Silent Check Valves: Acceptable Manufacturers: Metra-Flex 700 Series or TRW

Mission Duo Check II, ASA 150 Class, semi-steel or cast iron body, bronze trim.

E. Natural Gas Service: Brass body, threaded ends, lever handle, chrome plated ball, TFE or PTFE seat valves for natural gas service shall be AGA listed for use with natural gas at 5-psig minimum service pressure.

F. Drain Valves: Figure 710 or 712 with bronze hose thread adapter for hose connection and cap and chain.

PART 3 - EXECUTION

3.1 INSTALLATION

A. Provide valves at connections to equipment, where shown on the drawings or as required.

NCS2401 NCSD – RPHS – CHILLER REPLACEMENT SECTION 23 05 23

GENERAL DUTY VALVES FOR HVAC PIPING

B. Install all valves with stem horizontal or above, accessible and same size as connected piping.

C. Provide separate support for valves where necessary.

D. Install swing check valves in horizontal position only.

E. Valves to be line size.

3.2 COMMISSIONING

A. The equipment and systems referenced in this section are to be commissioned per Section 23 08 00 –

HVAC System Commissioning Requirements.

B. The contractor has specific responsibilities for scheduling, coordination, startup, test development, testing and documentation. Coordinate all commissioning activities with the Commissioning Authority.

NCS2401 NCSD – RPHS – CHILLER REPLACEMENT SECTION 23 05 29

HANGERS AND SUPPORTS FOR HVAC PIPING AND EQUIPMENT

PART 1 - GENERAL

1.1 SUMMARY

A. Work included: Providing of all required hangers and supports for ductwork and equipment.

1.2 SUBMITTALS

A. Provide submittals in accordance with Section 23 00 00.

B. Submittals shall include:

1. Manufacturer's technical literature for all products used indicating service for each type of hanger.

2. Include proposed pre-manufactured duct vibration isolation products.

3. Submit literature or describe duct-supporting method.

PART 2 - PRODUCTS

2.1 MANUFACTURERS

A. Caddy, Grinnell, Super Strut. Caddy used for selection.

2.2 DESCRIPTION

A. Pipe Hangers:

1. Non-insulated copper pipe: Figure 101.

2. Insulated pipe: Figures 103 and 403.

3. Riser clamp, copper pipe: Figure 520.

B. Structural Attachments: Provide all necessary structural attachments such as concrete anchors, beam clamps, hanger flanges and brackets. Hangers shall not be suspended from other piping, equipment, etc.

C. Miscellaneous items such as hanger rod, rod couplings, turnbuckles, etc. shall be standard figure numbers of the same manufacturer as the attachments.

D. All-thread rod used for pipe supports to be no less than 3/8-inch diameter.

PART 3 - EXECUTION

3.1 INSTALLATION

A. Powder-actuated tools or devices are not acceptable for use at any school site.

B. Provide hangers and supports in accordance with the instructions furnished by the manufacturers of these devices. Support ductwork as required by the OSMC and per SMACNA recommendations.

C. Provide additional structural members where required to support piping or ductwork.

D. Provide hangers and support devices in accordance with the equipment manufacturer's instructions for all equipment.

E. Anchorage to Floors, Roofs, Etc., Sway Bracing and Seismic Restraints:

1. The contractor is responsible to determine the means and methods of equipment installation and support.

NCS2401 NCSD – RPHS – CHILLER REPLACEMENT SECTION 23 05 29

HANGERS AND SUPPORTS FOR HVAC PIPING AND EQUIPMENT

2. Provide supports for all apparatus as specified, detailed, as required by the manufacturers of specific equipment and the project governing code authorities. Anchor all roof and base/floor mounted equipment with size and spacing of anchor bolts or other attachment means as recommended by the respective equipment manufacturer.

3. Provide seismic restraints on all mechanical equipment in conformance with applicable OSSC sections. Costs for seismic calculations are to be included in the bid price.

4. Provide deferred submittals directly to the governing code jurisdiction for anchorage to floors, roofs, etc., sway bracing and seismic restraints. Submittals to show locations and sufficient support details as required by the governing code jurisdiction.

5. Provide supplementary drawings and calculations as required by governing code jurisdictions noting seismic support data/calculations as required for permit purposes.

NCS2401 NCSD – RPHS – CHILLER REPLACEMENT SECTION 23 05 53

IDENTIFICATION FOR HVAC PIPING AND EQUIPMENT

PART 1 - GENERAL

1.1 SUMMARY

A. Work included: Providing of all required identification systems for HVAC equipment and piping.

1.2 SUBMITTALS

A. Provide submittals in accordance with Section 23 00 00.

B. Submittals shall include:

1. List of proposed equipment tags.

2. Product information on piping markers.

PART 2 - PRODUCTS

2.1 MANUFACTURERS

A. W. H. Brady Co. or Seton.

2.2 DESCRIPTION

A. Equipment Identification: Equipment identification tags shall be three-ply, black face, white center, black back phenolic plastic plates with minimum 3/16" high letters.

B. Piping Markers:

1. All vinyl self-sticking labels.

2. Colors to conform as follows:

a. Low Pressure Steam and Steam Condensate – Aluminum.

b. Hot Water Heating – Tan.

3. Piping to include directional (arrow) labels and system description labels such as steam, condensate, supply, return.

C. The presence of above ceiling equipment items shall be marked using self-adhesive tape markers affixed to the ceiling grid. The markers shall indicate equipment category and equipment number.

D. Provide self-adhesive tape markers for space temperature sensors indicating corresponding HVAC system.

PART 3 - EXECUTION

3.1 INSTALLATION

A. Provide each piece of equipment with a manufacturer's standard nameplate indicating manufacturer's name, model number, capacities and characteristics.

B. In addition, provide each piece of equipment with a plastic tag indicating its designation on this project

(such as EF-1, FC-1) and the area served. Mount this tag with screws, where possible, in a clearly visible location.

C. Affix piping markers to pipe or insulation in locations that make them clearly visible. Secure markers with two wraps of "Scotch Reinforced Tape" at each end.

NCS2401 NCSD – RPHS – CHILLER REPLACEMENT SECTION 23 05 53

IDENTIFICATION FOR HVAC PIPING AND EQUIPMENT

D. Locate markers at intervals of no more than 25 feet allowing visual identification of a line from any point along that line and as follows: Within 5-feet of each valve, elbow, tee, where a pipe passes through a wall, direction of flow on each leg of a "T" and on lower quarters of the line on horizontal runs where view is not obstructed. Provide arrow markers to indicate direction of flow away from each pipe identification marker.

E. Attach ceiling markers to the ceiling grid noting access locations of equipment mounted above the ceiling.

NCS2401 NCSD – RPHS – CHILLER REPLACEMENT SECTION 23 05 93

TESTING ADJUSTING AND BALANCING FOR HVAC

PART 1 GENERAL

1.1 SUMMARY

A. Work Included: Furnishing system balance work as specified.

1.2 OPERATION AND MAINTENANCE DATA

A. Provide O&M data in accordance with Section 23 00 00.

B. O&M data shall include copies of system balance data.

1.3 QUALITY ASSURANCE

A. Contract with Pacific Coast Air Balancing, Neudorfer Engineers Inc., Accurate Balancing Agency Inc., Air Balancing Specialty Inc., Precision Test and Balance Inc. or approved equal to perform the system balance work on this project.

PART 2 PRODUCTS

Not Used

PART 3 EXECUTION

3.1 GENERAL

A. Install new air filters in all fan coil units and blow-down all water strainers after the test run and before the start of testing and balancing.

B. Operate heating, cooling, ventilating, and their corresponding control systems continuously during the testing and balancing.

C. Provide ladders, scaffolding, and access to each system for proper testing and balancing.

D. Provide and install sheaves, belts, additional volume dampers and pump adjustments as required by the testing and balancing agency.

E. Confirm in writing that all wiring and controls for mechanical equipment have been installed, completed and tested.

F. Operate all controls during the period as required by the balance testing and balancing agency.

G. Preparation: Prior to test run, Contractor shall have performed a rough balance and the following:

1. Verify correct rotation of all fans.

2. Check for excessive vibration and noise.

3. Verify filter installation in filter assemblies.

4. Verify proper lubrication and lubricant for all times.

5. Check proper calibration and settings of controls.

6. Confirm that ductwork has been sealed.

H. Rooftop units:

1. Assure that air filters are clean, if not new, prior to beginning air balance work.

2. Adjust fan speed as required for air volumes. Speed shall be set to the minimum to provide required air volume at furthest run without excessive static pressure.

3. Adjust minimum outside air volume to that shown on the plans.

4. Include the following in the logs:

a. Supply, return and outside air volumes.

b. Supply air temperatures on full heating and full mechanical cooling.

c. Static pressure drops across fans, filters, dampers and coils.

d. Total pressure drops for supply and return system.

e. Fan speed or RPM.

f. Actual motor voltage and amperage.

I. Terminal Units:

1. Adjust minimum and maximum air volumes to values shown on Terminal Unit Schedule.

2. Adjust fan volumes to values shown on Terminal Unit Schedule.

3. Include the following in the logs:

a. Air pressure drop at full cooling air volume

b. Fan volume and system static pressure in heating mode as applicable.

c. Discharge air temperature at full heating (with scheduled minimum primary air and fan on as applicable).

d. Water flow volume at full heating.

e. Water coil pressure drop at full heating.

J. Process Cooling Units:

1. Assure that air filters are clean, if not new, prior to beginning air balance work.

2. Adjust fan speed as required for air volumes. Speed shall be set to the minimum to provide required air volume at furthest run without excessive static pressure.

3. Adjust minimum outside air volume to that shown on the plans.

4. Include the following in the logs:

a. Supply air volume.

b. Supply air temperatures on full mechanical cooling.

c. Static pressure drops across fans, filters, dampers and coils.

d. Total pressure drops for the supply system.

e. Fan speed or RPM.

f. Actual motor voltage and amperage.

K. Exhaust Fans:

1. Measure exhaust air volumes.

2. Adjust speed control or belt drive to obtain required air volume.

3. Record the fan nameplate data, fan rpm, motor voltage and amperage.

L. Air Distribution Systems (supply / return / exhaust):

1. Adjust air volumes at diffusers and grilles to within plus or minus 5% of the values shown on the plans.

2. Adjust diffusers and grilles for proper direction and throw.

3. Adjust linear diffusers for vertical throws without producing occupant drafts.

4. Log all readings taken.

5. Mark final position of all balancing dampers.

M. Hydronic Systems:

1. Adjust circuit setters to obtain flows noted on drawings.

2. Adjust triple duty valves on circulating pumps to obtain scheduled flows.

3. Include the following in the log:

a. Pump flow and pressure drops.

b. Actual pump motor voltage, amperage, RPM and overload heater sizes, as well as nameplate data.

c. Boiler flow, pressure drop and temperatures in and out.

d. Chiller flow and pressure drops, temperatures in and out for chilled and condenser water.

e. Chiller flow and pressure drops.

4. Set differential pressure setpoint on variable flow pumping systems to obtain the scheduled flow at the farthest coil.

N. Final Completion:

1. Controls and Sequence Verification – In addition to the Commissioning Agent’s work scope.

a. Cycle the fan coil unit control systems through the entire range of functions and verify proper operation and sequencing of heating, outside air damper modulation, thermostat operation, etc.

b. Provide the following as a separate portion of the test and balance log: Written verification that the equipment controls and sequencing appears to be correct and functioning properly at the time of performance of the system test and balance work.

3.2 COMMISSIONING

A. The equipment and systems referenced in this section are to be commissioned per Section 23 08 00 –

HVAC System Commissioning Requirements.

B. The contractor has specific responsibilities for scheduling, coordination, startup, test development, testing and documentation. Coordinate all commissioning activities with the Commissioning Authority.

C. Demonstrate air flow values to CxA and provide assistance to the commissioning team when TAB support is requested.

NCS2401 NCSD – RPHS – CHILLER REPLACEMENT SECTION 23 07 00

HVAC INSULATION

PART 1 - GENERAL

1.1 SUMMARY

A Work included:

1. Providing of all required insulation for ductwork.

2. Notify the district representative prior to covering completed piping and duct systems - All piping and ductwork to be reviewed by the district representative, engineer or authorized representative prior to installation of insulation.

1.2 SUBMITTALS

A. Provide submittals in accordance with Section 23 00 00.

B. Submit ta ls shal l include:

1. Data to show compliance with flame and smoke rating.

2. Manufacturer's catalog or technical data showing performance, dimensions, materials of construction and recommended methods of installation.

1.3 QUALITY ASSURANCE

A. Insulation materials and accessories such as adhesives, cement, etc. shall have composite fire and smoke hazard ratings, as tested by procedures indicated in NFPA 255 and U.L. 723, not to exceed a flame spread index of 25 and a smoke developed index of 50. Products or their shipping cartons shall have identification of the flame spread and smoke developed index.

PART 2 - PRODUCTS

2.1 MANUFACTURERS

A. Manville, Knauf, Owens-Corning, Certain-teed, or approved equal. Schuller used as basis of selection.

B. Elastomeric Insulation Products: Armacell, Rubatex, K-Flex or approved equal.

2.2 DESCRIPTION

A. Heating Hot Water Supply and Return Pipe Insulation:

1. Manville Micro-Lok HP rigid pre-formed fiberglass.

2. Maximum conductivity (k) = 0.27 Btu per inch/hour * ft2 * degree-F.

3. Pipe fittings: Zeston 2000 premolded PVC covers with fiberglass blanket insulation.

4. Foam filled elbows are not acceptable.

B. Chilled Water Supply and Return Pipe Insulation:

1. Manville Micro-Lok HP rigid pre-formed fiberglass.

2. Maximum conductivity (k) = 0.27 Btu per inch/hour * ft2 * degree-F.

3. Pipe fittings: Zeston 2000 premolded PVC covers with fiberglass blanket insulation.

4. Foam filled elbows are not acceptable.

PART 3 - EXECUTION

3.1 INSTALLATION

A. Heating Hot Water Pipe Insulation.

NCS2401 NCSD – RPHS – CHILLER REPLACEMENT SECTION 23 07 00

HVAC INSULATION

1. 1-1/2 inch and smaller: Provide 1-1/2 inch pipe insulation on hot water supply and return piping.

2. Larger than 1-1/2 inch: Provide 2-inch pipe insulation on hot water supply and return piping.

3. Insulate fittings on piping utilizing preformed pipe covering.

4. Insulate all valve bodies, fittings, unions, flanges and equipment with insulation equal to the attached service piping.

5. Seal all insulation to maintain a vapor barrier.

B. Chilled Water Pipe Insulation.

1. 1-1/2 inch and smaller: Provide 1-1/2 inch pipe insulation on hot water supply and return piping.

2. Larger than 1-1/2 inch: Provide 2-inch pipe insulation on hot water supply and return piping.

3. Insulate fittings on piping utilizing preformed pipe covering.

4. Insulate all valve bodies, fittings, unions, flanges and equipment with insulation equal to the attached service piping.

5. Seal all insulation to maintain a vapor barrier.

NCS2401 NCSD – RPHS – CHILLER REPLACEMENT SECTION 23 08 00

COMMISSIONING OF HVAC

PART 1 - GENERAL

1.1 SUMMARY

A. Section includes:

1. Commissioning process requirements for HVAC&R systems, assemblies, and equipment.

B. Related Sections:

1. Section 01 91 13 "General Commissioning Requirements".

2. Division 22 “Plumbing”.

3. Division 23 “Heating, Ventilating, and Air Conditioning (HVAC)”

4. Division 26 “Electrical”.

1.2 GENERAL DESCRIPTION

A. Commissioning Provider (CxP)

1. The CxP has been contracted directly with the owner for this project. The CxP has overall responsibility for planning and coordinating the commissioning process. However, commissioning involves all parties to the design and construction process, including the mechanical (Division 23) contractor, and all specialty sub-contractor within Division 23, such as sheet metal, piping, refrigeration, water treatment, and controls, plus major equipment suppliers as required.

B. Contractor Responsibility

1. The mechanical (Division 23) contractor’s responsibilities are defined in Section 01 91 13 of the specifications. These responsibilities apply to all specialty sub-contractors and major equipment suppliers within Division 23. Each contractor and supplier shall review Section 01 91 13, and their bids shall include for carrying out the work described, as it applies to each Section within the Division 23 specifications, individually and collectively.

C. HVAC Equipment and Systems to be Commissioned

1. Air Cooled Chiller

2. Chilled Water Pump

3. Heating Hot Water Pumps

PART 2 - PRODUCTS

A. Refer to Section 01 91 13 “General Commissioning Requirements” for minimum testing instrumentation criteria and performance.

B. Standard certified test equipment for commissioning will be provided by the Commissioning Provider.

C. All proprietary testing equipment and instrumentation required to verify and test system and equipment performance shall be provided by installing contractor and made available to the Commissioning Provider.

PART 3 - EXECUTION

3.1 GENERAL TESTING REQUIREMENTS

A. Contractor shall provide technicians, instrumentation, and tools to perform commissioning tests at the direction of the CxP and as outlined in Section 01 91 13 "General Commissioning Requirements".

B. Scope of HVAC&R testing shall include the entire HVAC&R installation, from central equipment for heat generation and refrigeration through distribution systems to each conditioned space. Testing shall include measuring capacities and effectiveness of operational and control functions.

C. Test all operating modes, interlocks, control responses, and responses to abnormal or emergency conditions, and verify proper response of building automation system (BAS) controllers and sensors.

D. The CxP shall prepare detailed testing plans, procedures, and checklists for HVAC&R systems, subsystems, and equipment.

E. Tests will be performed using design conditions whenever possible.

F. Simulated conditions may need to be imposed using an artificial load when it is not practical to test under design conditions. Before simulating conditions, calibrate testing instruments. Provide equipment to simulate loads. Set simulated conditions as directed by the CxP and document simulated conditions and methods of simulation. After tests, return settings to normal operating conditions.

G. The CxP may direct that set points be altered when simulating conditions is not practical.

3.2 INSTALLATION VERIFICATION AND START-UP ACTIVITIES

A. Refer to General Commissioning Specification Section 01 91 13.

3.3 TEST, ADJUST AND BALANCE VERIFICATION

A. Refer to General Commissioning Specification Section 01 91 13.

B. Prior to performance of testing and balancing work, provide copies of reports, sample forms, checklists, and certificates to the CxP.

C. Notify the CxP at least 10 days in advance of testing and balancing work and provide access for the CxP to witness testing and balancing work.

D. Provide test and balance preliminary report to CxP for review.

3.4 POINT TO POINT VERIFICATION AND FUNCTIONAL PERFORMANCE TESTING

A. Refer to General Commissioning Specification Section 01 91 13.

B. Functional performance testing and verification may be achieved by manual testing (persons manipulate the equipment and observe performance) or by monitoring the performance and analyzing the results using the control system’s trend log capabilities or by stand-alone dataloggers.

C. Simulated Conditions. Simulating conditions (not by an overwritten value) shall be allowed, though timing the testing to experience actual conditions is encouraged wherever practical.

D. Overwritten Values. Overwriting sensor values to simulate a condition, such as overwriting the outside air temperature reading in a control system to be something other than it really is, shall be allowed, but shall be used with caution and avoided when possible. Such testing methods often can only test a part of a system, as the interactions and responses of other systems will be erroneous or not applicable. Simulating a condition is preferable. e.g., for the above case, by heating the outside air sensor with a hair dryer rather than overwriting the value or by altering the appropriate setpoint to see the desired response. Before simulating conditions or overwriting values, sensors, transducers and devices shall have been calibrated.

E. Altering Setpoints. Rather than overwriting sensor values, and when simulating conditions is difficult, altering setpoints to test a sequence is acceptable. For example, to see the AC compressor lockout work at an outside air temperature below 55º F, when the outside air temperature is above 55º F, temporarily change the lockout setpoint to be 2º F above the current outside air temperature.

F. Setup. Each function and test shall be performed under conditions that simulate actual conditions as close as is practically possible. The sub-contractor executing the test shall provide all necessary materials, system modifications, etc. to produce the necessary flows, pressures, temperatures, etc. necessary to execute the test according to the specified conditions. At completion of the test, the sub-contractor shall return all affected building equipment and systems, due to these temporary modifications, to their pre-test condition.

3.5 TRAINING

A. Refer to General Commissioning Specification Section 01 91 13.

3.6 OPERATION AND MAINTENANCE MANUALS

A. Refer to General Commissioning Specification Section 01 91 13.

3.7 WARRANTY

A. Refer to General Commissioning Specification Section 01 91 13.

END OF SECTION 23 08 00

NCS2401 NCSD – RPHS – CHILLER REPLACEMENT SECTION 23 09 00

INSTRUMENTATION AND CONTROL FOR HVAC

PART 1 - GENERAL

1.1 DESCRIPTION

A. Furnishing and installing all control hardware and software necessary for a complete DDC control revisions as specified.

B. Furnish all control valves, actuators, and any other items necessary for a complete system and sequence of control

C. Final installation will allow all school control components to be monitored / controlled at a single point by district personnel through a single user interface.

D. Coordinate the installation of temperature sensors, valves and actuators with the mechanical contractor to assure all work required for a complete system is included in the base bid.

1.2 ALTERNATES

A. None.

1.3 QUALITY ASSURANCE

A. Provide control work by a single company with licensed journeymen specialists in the type of work required, so that only one supplier is responsible for all control work for the project.

B. Provide coordination with other contractors and subcontractors for work required by other trades for control work accomplishment.

1.4 SUBMITTALS

A. In diagrams, show complete piping or ductwork system schematics with DDC, electrical and pneumatic control devices, tubing and wiring superimposed.

B. Completely identify all control devices with manufacturer's type, number, and functional description.

C. Uniquely identify all control tubing, wire and conduit on the drawings with a logical numbering system.

D. Show all electric and hydronic connections of the control system to equipment furnished by others, complete to terminal points specifically identified with manufacturer's terminal designation.

E. In booklet form, provide a bill of material and catalog data on all control device types, including control operation description, technical parameters and connection identifications. Describe the complete sequence of operation containing all information necessary for clarity and understanding of device function and system sequence of operation.

F. Furnish a trunk cable schematic showing the local area network drawings.

G. Furnish a list of connected data points, including connected control unit and input device.

H. In booklet form, provide catalog data on all description, technical parameters and connection identifications. Describe the complete sequence of operation containing all information necessary for clarity and understanding of device function and system sequence of operation.

1.5 OPERATING AND MAINTENANCE DATA:

A. O&M Manuals shall submitted per the architectural specification requirements.

B. Include a complete set of control Shop Drawings indicating as built and operating changes.

C. Include operating and maintenance data on all equipment requiring periodic or incidental services or adjustment. Include a summary schedule for all maintenance tasks. Describe troubleshooting procedures for anticipated problems.

D. Controls Systems Commissioning:

1. Submit a complete, dated, and initialed record of all system adjustment for components of the control system.

2. Indicate deviations from the specified temperatures, pressures, flows, setpoints, etc.

3. Include a copy of the completed commissioning worksheets in each copy of the Operating and

Maintenance Data.

PART 2 - PRODUCTS

2.1 ACCEPTABLE MANUFACTURERS AND SYSTEMS

A. Automated Logic by Climatech.

2.2 CONTROL WIRING / COORDINATION WITH LINE VOLTAGE CONTROL

A. Provide control wiring to all control modules, sensors, pilot duty control relays and actuators required to provide the project sequences of operation.

B. All control wiring exposed in occupied areas to be in conduit.

C. Provide all control system related conduit within mechanical room or at equipment locations unless specifically shown to be in other divisions work.

D. Control wiring in non-accessible ceilings, walls or floors shall be in conduit.

E. All wiring not in conduit or control cabinets shall be rated for plenum installation.

F. Provide conduit where required between the zone temperature sensor locations and the zone equipment.

Provide all wiring / conduit in the base bid necessary for a complete operating control system.

2.3 AUTOMATION SYSTEM / DDC CONTROL DEVICES

A. All control devices to be standard products of the specified control system and accessory devices utilized by the controls installer consistent with North Clackamas School District standards.

PART 3 - EXECUTION

3.1 INSTALLATION

A. Single source responsibility of supplier shall be the complete installation and proper operation of the building automation system and control system and shall include debugging and proper calibration of each component in the entire system.

B. Provide all controllers to accomplish the control sequences specified herein.

C. Provide / coordinate the installation of; sensors, pipe wells, relays and any other devices and materials required to accomplish the functions described herein.

D. Identification - Provide nameplates identifying all switches, lights and starters, and each control device where the control function is not readily apparent.

3.2 SEQUENCES OF OPERATION

A. Energy Management System Point Schedule: Provide monitoring and control functions as listed herein for each piece of equipment listed below. Provide a point list that includes each hard wired, calculated and/or resettable point.

B. Energy Compliance:

1. Provide 365 day, 24 hour occupancy scheduling.

2. Provide sensors and/or software routines to operate the air handling unit, boilers and chiller to maintain the minimum night low limit temperature for that system.

3. When controlling both heating and cooling (mechanical), provide a 5-degree deadband in which the heating energy provided to the zone is reduced to a minimum.

4. Provide optimum start controls to enable a morning warm-up cycle capable of varying the unit start time to meet occupied setpoint at scheduled time of occupancy.

5. Close outside air dampers as appropriate to the equipment when the units are off and during the warm-up period.

3.3 FIELD QUALITY CONTROL

A. Startup: Implement a logical step-by-step startup and checkout of the control system. In addition, startup assistance and coordination shall be provided during startup of the mechanical equipment. Startup shall be considered complete after the entire system is operating properly.

B. Self-commission all hardware and software provided for the project.

C. Completed field commissioning sheets shall be included with the final “as-built” O&M manuals. These sheets shall include validation check fields for all physical and LAN inputs and outputs and graphics for each operating unit or system within the facility. Each system and point shall be listed, using logical names for future reference by the owner.

D. Commissioning shall include calibration and verification of operation of each I/O and graphic field.

Functional commissioning of software programming to meet sequences of operation as submitted and approved shall be verified on the field commissioning sheets.

E. At the completion of the job, in the presence of an Owner's representative, thoroughly check out the entire control system by simulating each control function and determine that the system performs in accordance with the Contract Specifications.

3.4 INSTRUCTION OF OWNER PERSONNEL

A. Provide complete list of system generated messages for system operation, including alarm messages.

B. Modify error message wording as required by the Owner's personnel.

C. Locate all control components for Operating Engineer.

D. The Owner will videotape the course for future use/training sessions. Submit an agenda listing topics to be covered during the training along with any literature to be used. Submit information to the Engineer and Owner for review/revision one month prior to project substantial completion and scheduling of the training course.

3.5 TRAINING AND TECHNICAL SUPPORT

A. Provide: 4 hours of training on the specific building controls. Training shall be oriented to make the owner proficient in the day to day use and operation of the DDC system. Additionally, the training shall include information specifically focused on showing the owner’s representative’s methods for troubleshooting the mechanical systems using the DDC system.

B. The contractor shall provide unlimited phone technical support to the owner’s representative during the one year warranty period. If the technical support location of the contractor is outside of the toll free calling area for the customer, the contractor shall have a toll free number or accept collect calls for the purpose of providing technical support.

C. In addition to required technical support and training Contractor shall make available access to factory approved training classes.

D. Classes shall be scheduled multiple times during the first year to allow flexibility for Owner’s representative to attend. Tuition to these classes shall be included within the scope of this project. If course locations are more than 200 miles from the project site, cost of transportation, lodging and meals shall be included within the scope of this project.

3.6 RECORD DRAWINGS

A. Provide complete and accurate record drawings noting all deviations from the information furnished in the original submittals.

NCS2401 NCSD – RPHS – CHILLER REPLACEMENT SECTION 23 20 00

HYDRONIC PIPING AND EQUIPMENT

PART 1 - GENERAL

1.1 SUMMARY

A. Work included:

1. Providing of all hydronic systems piping, appurtenances and equipment for all systems specified or shown on the drawings.

2. Provide detailed piping and room layout drawings based on equipment and piping shown, specified and the piping diagram/schematics shown on drawing sheets M1.3. Coordinate the layouts with the existing equipment and piping to remain as required.

3. Pressure testing of piping.

1.2 SUBMITTALS

A. Provide submittals in accordance with Section 23 00 00.

B. Submittals shall include:

1. Manufacturer's technical literature for all products used.

2. List of selected flow control valves with pressure ranges and flow indicated.

1.3 OPERATION AND MAINTENANCE DATA

A. Provide O&M data in accordance with Section 23 00 00.

B. O&M data shall include:

1. Manufacturer's literature.

2. Maintenance instructions.

1.4 QUALITY ASSURANCE

A. Piping material, installation and testing to meet requirements of the local plumbing, fire and building codes and serving utility requirements. Perform required pipe tests in the presence of the authority having jurisdiction.

PART 2 - PRODUCTS

2.1 MANUFACTURERS

A. Black Steel Pipe:

1. Standard product of manufacturer.

2. Schedule 40 and 80 black steel pipe conforming to ASTM A120-82 or A53-93A.

B. Copper Pipe.

1. Pipe: Standard product of manufacturer.

2. Hard drawn copper meeting ASTM B 88, type "L" hard drawn copper for plumbing service.

3. Fittings: Wrought copper solder type.

4. Solder / Brazing Alloy: 2-inch and smaller - Lead free 95-5, tin silver and flux. 2-1/2-inch and larger - Lead free brazing alloy and flux.

C. Air Vents: Hoffman or approved equal.

D. Balancing fitting: Bell & Gossett, Amtrol, Armstrong, Paco, Wheatley or approved equal.

E. Manual Air Vents: Dole or approved equal.

F. Unions: Standard product of manufacturer.

2.2 DESCRIPTION

A. Hot Water Piping.

1. Schedule 40 black steel pipe.

2. Fittings: 150 psi screwed malleable iron for 2-1/2" and smaller, Schedule 40 weld fittings conforming to ASTM A234 for 3" and larger.

B. Manual Air Vents: Dole #9 coin valve or approved.

C. Miscellaneous Condensate and Drain Piping:

1. Pipe: Hard drawn copper meeting ASTM B 88, type "L" hard drawn copper…