DIVISION 23
SECTION 23 08 00
COMMISSIONING OF HVAC
SYSTEMS
PART 1 - GENERAL
1.1
RELATED DOCUMENTS
A.
Drawings and general provisions of the Contract, including General and Supplementary Conditions and
other Division 01 Specification Sections, apply to this Section.
B.
ASHRAE Guideline 1-2007, HVAC&R Technical Requirements for the Commissioning Process
C.
OPR and BoD documentation are included by reference for information only.
1.2
SUMMARY
A.
This Section includes general requirements that apply to implementation of the commissioning process
without regard to specific systems, assemblies, and components.
B.
Related Sections include the following:
1.
Division 01 Section 01 91 00 Commissioning General Requirements for general commissioning
process activities.
2.
Division 23 Mechanical
3.
Division 28 Electronic Safety and Security for interaction with fire alarm systems
1.3
DEFINITIONS
A.
Commissioning Plan: A document, prepared by CxA, that outlines the organization, schedule, allocation of
resources, and documentation requirements of the commissioning process.
B.
CxA: Commissioning Authority.
C.
Quality Assurance: A program for the systematic monitoring and evaluation of the various aspects of a
system, assembly, or component to ensure that standards of quality are being met. This is the
responsibility of the CxA.
D.
Quality Control: A system for ensuring the maintenance of proper standards in systems, assemblies, and
components. This is the responsibility of the Contractor.
E.
Official: State or Local official having jurisdiction over the HVAC&R systems
F.
Systems, Assemblies, Equipment, and Components: Where these terms are used together or separately,
they shall mean “as-built” systems, assemblies, equipment, and components.
Buley Library Renovations
SCSU, New Haven, CT
Project No: BI-RS-2258 Phase 2
23 08 00/ 1 of 10
9-20-2013 Bid Specification
DIVISION 23
SECTION 23 08 00
COMMISSIONING OF HVAC
SYSTEMS
PART 2 - PRODUCTS (NOT USED)
PART 3 - EXECUTION
3.1
CONSTRUCTION CHECKLISTS
A.
The CxA shall provide Construction Checklists to the Contractors for execution that will indicate expected
Quality Control features required for a highest-quality installation. The contractor shall complete the
checklists as construction progresses and return them to the CxA as indicated in Section 01 9113
Commissioning General Requirements.
B.
Checklists for this section will include:
1.
Air Handling Units
2.
Humidifiers
3.
Exhaust fans
4.
Return fans
5.
All variable air volume (VAV) terminal units and associated reheat coils
6.
Chillers and pumps
7.
Chilled water system
8.
Cooling Towers and condenser water pumps, etc.
9.
Hot Water pumps
10.
Hot water system
11.
Computer room air conditioning units and associated split system condensers
12.
Unit heaters, cabinet unit heaters, etc.
13.
Testing Adjusting and Balancing (TAB)
14.
Building automation system and Direct Digital Controls and system interlocks
15.
Existing equipment with control modifications
16.
Ductwork systems
17.
Piping Systems
18.
Terminal heating units ( unit heaters, reheat coils, fintube, radiant ceiling panels)
19.
Additional Items to be added as required
C.
A sample installation checklist is included to show the typical scope and rigor of the process.
3.2
PREREQUISITES TO TESTING
A.
Prior to the testing of these systems or assemblies, the Contractor shall certify that:
1.
The system or assembly is completely installed, functional, and documented through checklists.
2.
Work performed by other trades, but essential for this system or assembly’s operation, is complete
(e.g., electrical components are wired and power is provided)
3.
All contractor-performed start-up procedures and tests are complete and documented.
4.
Preliminary trending data provided to verify actual system operation.
5.
The system or assembly is ready for the Owner to take beneficial use.
Buley Library Renovations
SCSU, New Haven, CT
Project No: BI-RS-2258 Phase 2
23 08 00/ 2 of 10
9-20-2013 Bid Specification
DIVISION 23
SECTION 23 08 00
COMMISSIONING OF HVAC
SYSTEMS
3.3
SYSTEM OR ASSEMBLY TEST REQUIREMENTS
A.
The CxA will provide Functional Performance Test procedures to the Contractor for execution for the
following specific systems, assemblies, and components:
1.
Air Handling Units
2.
Humidifiers
3.
Exhaust fans
4.
Return fans
5.
All variable air volume (VAV) terminal units and associated reheat coils
6.
Chillers and pumps
7.
Chilled water system
8.
Cooling Towers and condenser water pumps, etc.
9.
Hot Water pumps
10.
Hot water system
11.
Computer room air conditioning units and associated split system condensers
12.
Unit heaters, cabinet unit heaters, etc.
13.
Testing Adjusting and Balancing (TAB)
14.
Building automation system and Direct Digital Controls and system interlocks
15.
Existing equipment with control modifications
16.
Additional Items to be added as required
B.
Acceptance criteria and test details will be in accordance with the related sections including the following:
1.
Division 01 Section 01 91 00 Commissioning General Requirements for general commissioning
process activities.
2.
Division 23 Mechanical
3.
Division 28 Electronic Safety and Security.
C.
A sample functional performance test is included to show the typical scope and rigor of the process.
3.4
TEST REPORTS
A.
3.5
Provide copies of all reports required in the listed reference sections (see Section 1.02 SUMMARY above
for the sections) for review.
SAMPLE FORMS
Buley Library Renovations
SCSU, New Haven, CT
Project No: BI-RS-2258 Phase 2
23 08 00/ 3 of 10
9-20-2013 Bid Specification
DIVISION 23
SECTION 23 08 00
COMMISSIONING OF HVAC
SYSTEMS
Installation Checklist
Roof Top Unit # _______________Serving Room/Area/Floor __________________
Model Verification
Specified
Submitted
Installed
Manufacturer
Model Number
Serial Number
Inlet Size
Cool CFM / Heat CFM
Installation Checks
ID
Description
Pass /
Fail
1
Verify the unit has been installed on a roof curb. Entire length and width under base shall be
sealed for additional water management protection. (15500 2.42D)
2
The piping cabinet shall have removable panels or optional access door of the same construction
as unit door. (15500 2.42H)
3
Verify view windows are provided for all fan section access doors and is made of tempered glass.
(15500 2.42K)
4
Verify that a factory mounted light fixtures are provided in all sections of the unit that have access
doors. Provide individual light switches installed adjacent to access doors. (15500 2.42L)
5
Coils shall be removable by unbolting the wall panels in the coil section. Connections shall be
clearly labeled on the outside of units. (15500 2.42O)
6
7
Verify filter section shall have filter racks, an access door for filter removal and block offs as
required to prevent air bypass around filters. Units shall be supplied with 4” flat and 12” cartridge
bag filters. (155500 2.42P)
Verify factory wired disconnect switches for each fan (VSDs are to be mounted in the building not
within the rooftop unit). Also provide factory wired lights and GFI receptacles (two per unit).
(15500 2.42V)
8
Provide smoke rated damper assembly for both supply and return air openings for RTU-1, 7 and 9.
(15500 2.42W)
9
Provide isolation damper assemblies for both supply and return air openings for all rooftop units
except RTU-1, 7 and 9. (15500 2.42X)
10
11
Comments
Verify the following piping components have been installed in the direction of flow for the CW/HW
supply: (M4-2-0)
a. Thermometer
b. Butterfly Valve
c. Strainer with hose end drain valve with cap and chain.
d. Union
e. ¾” Hose end drain valve with cap and drain.
Verify the following piping components have been installed in the direction of flow for the CW/HW
return: (M4-2-0)
a. Automatic Air Vent
b. Union
c. 2-Way Control Valve
d. Union
e. Butterfly Valve with Memory Stop
f.
Thermometer
Approvals (only one required)
Name (printed neatly)
Signature
Contractor/Manuf. Rep.
Engineer
Construction Administrator
Commissioning Agent
Buley Library Renovations
SCSU, New Haven, CT
Project No: BI-RS-2258 Phase 2
23 08 00/ 4 of 10
9-20-2013 Bid Specification
Date
DIVISION 23
SECTION 23 08 00
COMMISSIONING OF HVAC
SYSTEMS
Sample Functional Performance Test
Heat Recovery Rooftop Unit – ERV-2
1. Participants
Name/Representing
/
/
/
Party filling out this form
Participation (Testing, Witness, etc)
Date of test
2. Prerequisite Checklist
a.
A completed and approved balancing report has been provided.
b.
An as-built version of the controls submittal has been provided.
c.
The controls contractor has certified that their internal commissioning is complete and the project is ready
for third-party verification. CC initials: ________. Date: ________.
d.
The general contractor has certified that the construction is substantially complete and ready for thirdparty verification. GC initials: ________. Date: ________.
e.
Record all values for setpoints, control parameters, limits, delays, lockouts,
schedules, etc., that have been changed to accommodate testing:
Parameter
Occupied space
temperature heating
setpoint
Occupied space
temperature cooling
setpoint
Frost Control
temperature alarm
setpoint
Occupied/Unoccupied
mode
Occupied Space
Humidity Setpoint
Pre-Test
Values
Returned
to Pre-Test
Values √
Parameter
Pre-Test
Values
Returned
to Pre-Test
Values √
Unoccupied space
temperature heating
setpoint
Unoccupied space
temperature cooling
setpoint
Occupied low space
temperature alarm
setpoint
Occupancy Schedule
Low Limit Switch SP
Buley Library Renovations
SCSU, New Haven, CT
Project No: BI-RS-2258 Phase 2
23 08 00/ 5 of 10
9-20-2013 Bid Specification
DIVISION 23
SECTION 23 08 00
COMMISSIONING OF HVAC
SYSTEMS
3. Sensor Calibration Checks. The sensors listed below are to be checked for calibration and adequate
location.
Sensor
Locati
on
OK1
BAS
Value
Measure
d Value
Pas
s
Y/N
Sensor
Locatio
n
1
OK
BAS
Value
Measure
d Value
Pas
s
Y/N
Outside air
temperature
Y/N
Y/N
WDAT
(CLT) - avg
Y/N
Y/N
Space
temperature
Y/N
Y/N
DAT - avg.
Y/N
Y/N
Discharge
Y/N
Air Humidity
1
Sensor location is appropriate and away from causes of erratic operation.
Comments:
Y/N
RAT - avg.
Y/N
Y/N
4. Device Calibration Checks. The actuators or devices listed below are to be checked for proper operation
and/or calibration.
Device or Actuator
Procedure / State
BAS Value
Site
Observation
Pass
Y/N
Outside air damper / actuator
1. Observe OA damper
modulating in unison with RA and
EA damper.
Y/N
Exhaust air damper / actuator
1. Observe EA damper
modulating in unison with RA and
OA damper.
Y/N
Stop
Y/N
Start
Y/N
Exhaust air fan status
Return air damper / actuator
Supply air fan and status
Electric Duct Heat
Heat Recovery Wheel
H/C Valve
Low Limit Switch
1. Observe during outside air
damper testing. Return air
damper should operate inversely
with the outside air damper.
1. Stop
/Status
Y/N
2. Start
/Status
Y/N
Y/N
1. Off
Y/N
2. On
Y/N
Stop
Y/N
Start
Y/N
Fail Position
50 % Open
100 % Open
Trip
Y/N
Y/N
5. Notes
Buley Library Renovations
SCSU, New Haven, CT
Project No: BI-RS-2258 Phase 2
23 08 00/ 6 of 10
9-20-2013 Bid Specification
DIVISION 23
SECTION 23 08 00
COMMISSIONING OF HVAC
SYSTEMS
6.
Functional Testing Record
Seq. ID
Mode ID
1.
2.
1
UNOCCUPIED MODE
(Vacation Periods Only)
3.
Test Procedure
(including special
conditions)
Command the unit to
the unoccupied mode
through the BAS.
When the unit is in the
unoccupied
mode
command
the
unoccupied
space
temperature
heating
setpoint to 5°F above
the current average
space temperature.
When the unit is in the
unoccupied
mode
command
the
unoccupied
space
temperature
heating
setpoint to 5°F below
the current average
space temperature.
Expected Response
1.
The outside air dampers will be
closed. The return air damper
will be open 100%. Observe fail
position of DTW (HCV) valve.
The heating unit will cycle to the
unoccupied set point of 60deg
(adj). The supply air fan will be
off. This is the “shutdown” mode
for the unit.
2.
The outside air dampers will
remain closed. The return air
damper will remain open. The
supply air fan will be on. The
heating module will start.
3.
The heating module will be deenergized. The supply air fan will
stop. The unit will return to
shutdown mode.
1.
The supply air fan will start. The
outside, return and exhaust air
dampers
will
modulate
to
maintain a minimum discharge
air temperature setpoint of 53° F
at sensor CLT. Heat wheel speed
will control at this setpoint.
2.
The supply air fan will remain on
line. The outside, return and
exhaust air dampers will continue
modulating. The DTW (HCV) will
modulate to heat the space until
the
setpoint
is
satisfied.
Discharge air temperature is
limited to 55 to 80 Deg F.
Pass
Y/N
Y/N
Note: This may not be set
up, as no sequence was
provided.
3
OCCUPIED MODE
HEATING
(SYSTEM INDEXED TO
HEAT)
1.
Command the unit to
occupied mode.
2.
When the unit is in the
occupied mode adjust
the space temperature
heating setpoint to 5°F
above the current
space temperature.
Note: If system is not
indexed to heating mode
DTW (HCV) valve will
remain closed.
Buley Library Renovations
SCSU, New Haven, CT
Project No: BI-RS-2258 Phase 2
23 08 00/ 7 of 10
9-20-2013 Bid Specification
Y/N
Notes
DIVISION 23
SECTION 23 08 00
COMMISSIONING OF HVAC
SYSTEMS
Seq. ID
Mode ID
1.
2.
4
OCCUPIED MODE
ECONOMIZER
(COOLING MODE
INDEXED)
3.
5
HEAT RECOVERY
MODE
Test Procedure
(including special
conditions)
Note: May not apply
not specified in
sequence of
operation.
When the unit is in the
occupied mode
override the outside air
temperature to 48°F.
Command the space
temperature occupied
cooling setpoint to 5°F
above the current
space temperature and
the occupied heating
setpoint to 5°F below
the current space
temperature.
Command the mixed
air temperature
setpoint to 5°F below
the current mixed air
temperature.
Command the mixed
air temperature
setpoint to 5°F above
the current mixed air
temperature.
Expected Response
1.
The supply air fan will remain on.
The outside, return and exhaust
air dampers will modulate to
provide more outside air, in a
direct action control algorithm, to
maintain
the
mixed
air
temperature setpoint of 55
degrees. If the cooling setpoint is
not met then the DWT (HCV)
valve will modulate open to met
space setpoint.
2.
The supply air fan will remain on.
The outside, return and relief air
dampers will modulate to provide
less outside air, in a direct action
control algorithm, to maintain the
mixed air temperature setpoint.
Pass
Y/N
Y/N
Command the mixed
air
temperature
setpoint to 5°F above
the current mixed air
temperature.
1. Normal operation
1. The heat recovery wheel is rotating
with the exhaust air passing thru the
wheel and the OA passing thru the
wheel to warm air or cool air. No air is
bypassing wheel
Buley Library Renovations
SCSU, New Haven, CT
Project No: BI-RS-2258 Phase 2
23 08 00/ 8 of 10
9-20-2013 Bid Specification
Y/N
Notes
DIVISION 23
SECTION 23 08 00
COMMISSIONING OF HVAC
SYSTEMS
Seq. ID
6.
Test Procedure
(including special
conditions)
Mode ID
OCCUPIED
DEHUMIDIFICATION
(COOLING MODE
INDEXED ONLY)
1. With system indexed to
cooling and the system is in
occupied mode lower
space humidity setpoint
(62%) 10% lower.
OCCUPIED COOLING
(COOLING MODE
INDEXED)
Pass
Y/N
1. DTW (HCV) will modulate and
electric heater will stage on and off to
maintain space setpoint. This is the
only function of the electric heater.
Y/N
Return to normal.
2. DTW valve will return to normal
control and the electric heater will
stage off.
1. With the system in
occupied
mode,
lower
space temperature setpoint
(75) as sensed by TR, 5
Deg F. lower than current
space temperature.
1. The heat wheel increase speed to
shed return air heat and the DWT
(HCV) valve will modulate open to
maintain new space setpoint. DAT
shall never drop below 55 Deg. F.
Allow time for control to stabilize.
2.
7.
Expected Response
Y/N
2. Return to normal.
1. With the unit running,
raise the frost control
setpoint as sensed at TF, 5
Deg F higher than current
exhaust air temperature.
8.
FROST CONTROL
1. Observe heat wheel slow to raise
exhaust air temperature to high
setpoint.
2. Observe low exhaust air alarm at
BAS.
Y/N
2. Reset alarm time delay
for exhaust air temperature
to 2 minutes.
3. Return all to normal.
9.
FREEZE STAT ALARM
AND SHUTDOWN
1. With the unit running in
the occupied mode, trip the
low limit thermostat located
upstream of the HC coil.
2. Manually reset the
freeze alarm at the BAS.
10
8
DIRTY AIR FILTER
ALARM
SUPPLY AIR FAN
ALARM AND
SHUTDOWN
1. With the unit operating,
decrease the dirty filter
alarm delay time to 2
minutes, and then gently
pump up the high side of
the filter DP.
2. Return to normal.
1. With the unit running in
the occupied mode, stop
the supply air fan by turning
it off at its starter.
1. The unit will shut down, and all
dampers will go to their fail state, and
DTW (HCV) valve will fail open to the
coil. The BAS will indicate a freeze
alarm.
Y/N
2. The unit will start in occupied
mode.
1. Check that the BAS alarms.
Y/N
1. The unit will go to its shutdown
mode. The BAS will indicate a supply
air fan status alarm.
Y/N
Buley Library Renovations
SCSU, New Haven, CT
Project No: BI-RS-2258 Phase 2
23 08 00/ 9 of 10
9-20-2013 Bid Specification
Notes
DIVISION 23
SECTION 23 08 00
COMMISSIONING OF HVAC
SYSTEMS
Seq. ID
Mode ID
9
EXHAUST FAN
SHUTDOWN
11
TRENDS
Test Procedure
(including special
conditions)
1. With the unit running in
the occupied mode, stop
the exhaust fan by turning it
off at its starter.
Set the following points for
15 minute trend samples
and review in 48 hours:
Expected Response
Pass
Y/N
1. The unit will go to its shutdown
mode. The BAS will indicate an
exhaust fan status alarm.
Y/N
Trend Data
Y/N
1. Space temperature.
2. Supply air fan status.
3. Exhaust air fan status
4. Mixed air temperature.
5. Outside air temperature.
6. Mixed air damper
position
7. Room Humidity
8. Supply Air Temperature
-- END OF TEST --
END OF SECTION
Buley Library Renovations
SCSU, New Haven, CT
Project No: BI-RS-2258 Phase 2
23 08 00/ 10 of 10
9-20-2013 Bid Specification
Notes