Constant Volume AHU

As-Found Audit information

System Description:
Building Name:
Building Address:
Building Description:
Name of Auditor:
Date of Audit:

As Found System Template: Constant Volume AHU Page 1 of 31

Current System General Assessment

This Template is a suggested approach to standardize the information collected from a Constant Volume Air Handling System and Terminal Units. This tool has been designed for use on a Windows based PC or tablet using Microsoft Office Word 2007 or newer. Through the use of screen captures and pull-down menu options this tool will assist in summarizing the As-Found details and operational sequences for this equipment.

Template Guide

a)Screen-Shot: Where screen shots are indicated, a short instructional image is provided with a step-by-step procedure designed to assist a novice Windows user in the capturing of a specific view from a PC screen and placement within this document. The approach described is one of many variants possible which is intended to provide a general description to provide the results being sought. (See example below…)

b)Text Prompts: Where specific information is required, blank text boxes and prompts have been provided for data entry. To enter data in these fields, simply click on the grey box and start typing in relevant information to correspond with the category heading. The box size will adjust to accommodate the amount of text entered into the field. (See example below…)

c)Pull-Down Menus: Throughout the document pull-down menus have been provided with a list of options available to select from. Obviously not all possible choices for each category could be anticipated for each category – in these cases a blank field has been made available to record specific details for each category. Where blank fields have been provided, the pull-down menus have been provided as a convenience and should not be considered as the only options from which to select from for each category. Where a pull-down menu is used to confirm whether a line item has been reviewed or not, select asuitable response to complete the form.(See examples below…)

d)Additional Remarks (column): This field has been provided as another area to add any additional comments deemed relevant by the system assessor for each category. Information included in this column is entirely optional and at the discretion of the system assessor. (See example below…)

e)Check-boxes: The use of check-boxes provides a quick means of documenting large amounts of repetitive information in a clean and organized fashion. To open up the Check Box Field Options window, double-click on the grey box to be checked and select the Checked option under the Default value – then select OK. (See example below…)

f)System equipment selection check-boxes: The use of check-boxes provides an easy and efficient way of identifying the equipment and features of a particular system. To identify equipment as part of the system, select the check-box next to the equipment title, double-click on the grey box and select the Checked option under the Default value – then select OK. Once the check-box is checked, the equipment section may be filled in. If equipment listed in the template is not part of the system, check the check-box next to “Not Applicable” by following the same procedure as described above. If the equipment is checked as “Not Applicable”, the section contents can be deleted leaving only the section title to clearly show that it is not relevant to the particular system. (See example below…)

g)Y or N: Anotherquick means of documenting large amounts of repetitive information in a clean and organized fashion, similar to check-boxes, is the Y (for Yes) and N (for No) entry fields. These fields provide a positive or negative response to the topic listed at the top of the column. Simply enter a Y or N in the grey field provided. (See example below…)

h)General Editing and Document Maintenance: Beyond all the special features of the template, it is essentially a word document when completed. Where excess screen-shot categories, text-prompts, unused pull-down menus or redundant rows remain after entering all relevant information pertaining to the AHU, the user should tidy-up the document by deleting any unused or redundant template clutter to complete the process and produce a clean informative document representative of the effort put into completing it.The Template Guide Section (shown in blue) instructions and diagrams should also be deleted once the document is complete.

i)Alternate Formats: In circumstances where alternate documents are used in place of this template, Manitoba Hydro will require all categories indicated in this template will be included and suitable description will be provided.

Energy Saving Opportunities (ESO’s)

The ultimate objective of this assessment is to identify ESO’s that can be considered for Energy Conservation Measures within the Program requirements for this particular system. In support of this objective, a list of Common Energy Saving Opportunities (ESO’s) has been provided in Table CAVaof this Template(Review All Line Items on Table CAVa – Current System | Common AHU Energy Saving Opportunities …on the next page). Table CAVb has been included for any other ESO’s that can be identified (See CAVb – Current System | PBC Purposed AHU Energy Saving Opportunities). The far right column ofTable 4a – Current System | AHU Sequences of Operation Assessmenthas been included to document all ESO recommendations for this system (See example below…).

Table CAVa – Current System | Common AHU Energy Saving Opportunities (ESO’s):

Air Handling Unit (AHU) Considerations
ESO Reviewed (select√ or Not Applicable)
  1. Revise control sequence:
  2. [select]Modify AHU Optimum Start to maintain the mixed air dampers in full return air mode for maximum reasonable time after the Occupied Start time.
  3. [select]Implement a Pre-Occupied Purge Mode.
  4. [select]Apply PID loop-tuning to mixed air damper control to improve control stability.
  5. [select]Seasonally reset supply air temperature control to meet space heating and cooling demands.
  6. [select]Reset supply air temperature control to actively meet space heating and cooling demands.
  7. [select]Reset humidity set-point to the outdoor air temperature based on a reset schedule designed to include the heat loss through the window to prevent condensation on the windows.
  8. Optimize Equipment Run-Time:
  9. [select]Revise heat pump compressor stages sequencing for optimal energy use (consider equal run-time as part of control sequence revisions).
  10. [select]Implement Run-Time totalization to track equipment use for Persistence Monitoring use later in the EBOP program.
  11. Optimize AHU control schedule:
  12. [select]Based on current building occupant use, adjust AHU Occupied start and stop times
  13. [select]Confirm AHU control schedule includes unoccupied programming for all statutory holidays, etc.
  14. Coordinate HVAC air flow balance and control air flow measurement:
  15. [select]Confirm with the qualified TAB agency that the space static pressure control is effectively being managed at three separate seasons: Summer, Shoulder Season & Winter.
  16. Control Device Adjustment:
  17. [select]Adjust linkage and actuator for positive closure of motorized damper on outdoor wall.
  18. [select]Adjust control valve travel and stops for positive closure (or full-bypass) of valve – replace valve if seat is worn or adjustment is not possible.
  19. [select]Adjust proving device for positive indication of equipment operation.
  20. [select]Adjust temperature control for accurate operation.
  21. [select]Adjust humidity control for accurate operation.
  22. [select]Adjust pressure control for accurate operation.
  23. Control sensor calibration:
  24. [select]Validate all control sensors are indicating values within reasonable tolerance of the product range of accuracy (or control industry standards).
  25. [select]Where reliable sensor calibration cannot be accomplished across a reasonable range of measured values, arrange for the sensor to be replaced.
  26. [select]Where a sensor is being adversely influenced by placement in sunlight, close proximity to a heat-source, or other similar, arrange for the sensor to be relocated.
  27. Additional measures:
  28. [select]
  29. [select]
  30. [select]
  31. [select]
  32. [select]

  1. Current System Description

Figure 1a: Graphic Screen-Shot of Current System, (as available from BAS)

Figure 1b: Graphic Screen-Shot of Current System, (as available from BAS)

Figure 1c: Graphic Screen-Shot of Current System, (as available from BAS)

1.1 Role and Placement of this HVAC system within the Building:

Table 1a – Current System | AHU Description:

Air Handling Unit (AHU) Ventilation Componentsper AHU System
Additional Remarks
  1. Fan Assemblies:
Not Applicable(Check this box and erase details below if this system does not exist in the building)
  1. Supply Fan:
Location:
Quantity:
CFM (total max AF)
Motor Power: Units [Choose an item] [Actual/Estimated]
Motor Efficiency: % [Actual/Estimated]
Motor Load: Units [Choose an item] [Actual/Estimated]
  1. Fan Configuration [Choose an item]
Fan Control Options [Choose an item]
Location:
Quantity:
CFM (total max AF)
Motor Power: Units [Choose an item] [Actual/Estimated]
Motor Efficiency: % [Actual/Estimated]
Motor Load: Units [Choose an item] [Actual/Estimated]
  1. Fan Configuration [Choose an item]
Fan Control Options [Choose an item]
Location:
Quantity:
CFM (total max AF)
Motor Power: Units [Choose an item] [Actual/Estimated]
Motor Efficiency: % [Actual/Estimated]
Motor Load: Units [Choose an item] [Actual/Estimated]
  1. Fan Configuration [Choose an item]
Fan Control Options [Choose an item]
Location:
Quantity:
CFM (total max AF)
Motor Power: Units [Choose an item] [Actual/Estimated]
Motor Efficiency: % [Actual/Estimated]
Motor Load: Units [Choose an item] [Actual/Estimated]
  1. Fan Configuration [Choose an item]
Fan Control Options [Choose an item]
Location:
Quantity:
CFM (total max AF)
Motor Power: Units [Choose an item] [Actual/Estimated]
Motor Efficiency: % [Actual/Estimated]
Motor Load: Units [Choose an item] [Actual/Estimated]
  1. Motorized Damper Control:
Not Applicable(Check this box and erase details below if this system does not exist in the building)
  1. Common Control Signal [Choose an item] Common Damper Selection [Choose an item]
  2. Dedicated Control Signal [Choose an item] Dedicated Damper Selection [Choose an item]
  3. Dedicated Control Signal [Choose an item] Dedicated Damper Selection [Choose an item]
  4. Dedicated Control Signal [Choose an item] Dedicated Damper Selection [Choose an item]
  5. Dedicated Control Signal [Choose an item] Dedicated Damper Selection [Choose an item]
  6. Dedicated Control Signal [Choose an item] Dedicated Damper Selection [Choose an item]
  7. Dedicated Control Signal [Choose an item] Dedicated Damper Selection [Choose an item]
  8. Dedicated Control Signal [Choose an item] Dedicated Damper Selection [Choose an item]
Additional Remarks:
  1. Coil Assemblies:
Not Applicable(Check this box and erase details below if this system does not exist in the building)
  1. Coil Placement [Choose an item]
Heating-Cooling Medium/Source [Choose an item]
Primary Control [Choose an item]
Primary Configuration [Choose an item]
Primary Coil Energy Transfer to Air: Units [Choose an item]
Heating-Cooling Medium/Source [Choose an item]
Secondary Control [Choose an item]
Secondary Configuration [Choose an item]
Secondary Coil Energy Transfer to Air: Units [Choose an item]
Additional Remarks:
  1. Coil Placement [Choose an item]
Heating-Cooling Medium/Source [Choose an item]
Primary Control [Choose an item]
Primary Configuration [Choose an item]
Primary Coil Energy Transfer to Air: Units [Choose an item]
Heating-Cooling Medium/Source [Choose an item]
Secondary Control [Choose an item]
Secondary Configuration [Choose an item]
Secondary Coil Energy Transfer to Air: Units [Choose an item]
Additional Remarks:
  1. Coil Placement [Choose an item]
Heating-Cooling Medium/Source [Choose an item]
Primary Control [Choose an item]
Primary Configuration [Choose an item]
Primary Coil Energy Transfer to Air: Units [Choose an item]
Heating-Cooling Medium/Source [Choose an item]
Secondary Control [Choose an item]
Secondary Configuration [Choose an item]
Secondary Coil Energy Transfer to Air: Units [Choose an item]
Additional Remarks:
  1. Coil Placement [Choose an item]
Heating-Cooling Medium/Source [Choose an item]
Primary Control [Choose an item]
Primary Configuration [Choose an item]
Primary Coil Energy Transfer to Air: Units [Choose an item]
Heating-Cooling Medium/Source [Choose an item]
Secondary Control [Choose an item]
Secondary Configuration [Choose an item]
Secondary Coil Energy Transfer to Air: Units [Choose an item]
Additional Remarks:
  1. Heat Recovery Assemblies:
Not Applicable(Check this box and erase details below if this system does not exist in the building)
  1. Heat Recovery Type [Choose an item]
Auxiliary Load [Choose an item] Units [Choose an item]
Type of Recovery [Choose an item]
Heat Recovery Classification [Choose an item]
Heat Recovery Standard [Choose an item]
Additional Remarks:
  1. Heat Recovery Type [Choose an item]
Auxiliary Load [Choose an item] Units [Choose an item]
Type of Recovery [Choose an item]
Heat Recovery Classification [Choose an item]
Heat Recovery Standard [Choose an item]
Additional Remarks:
  1. HVAC Controls: Primary Equipment:

  1. Controller Type [Choose an item]
Man-To-Machine Interface [Choose an item]
Historic Data Collection [Choose an item]
Historic Data Available Memory Capacity [Choose an item]
Remote Access [Choose an item]
Additional Remarks:

Table 1b – Current System|Terminal Unit Air Distribution Description:

Air Distribution (Terminal Unit) Ventilation Components per AHU System
Additional Remarks
  1. Unit Heater (UH):
Not Applicable(Check this box and erase details below if this system does not exist in the building)
  1. Unit Heater Style [Choose an item]
Unit Heater Control [Choose an item]
Quantity:
  1. Unit Heater Style [Choose an item]
Unit Heater Control [Choose an item]
Quantity:
  1. Unit Heater Style [Choose an item]
Unit Heater Control [Choose an item]
Quantity:
  1. Unit Heater Style [Choose an item]
Unit Heater Control [Choose an item]
Quantity:
  1. Unit Heater Style [Choose an item]
Unit Heater Control [Choose an item]
Quantity:
  1. Fan Coils:
Not Applicable(Check this box and erase details below if this system does not exist in the building)
  1. Fan Coil Style [Choose an item]
Fan Coil Control [Choose an item]
Quantity:
  1. Fan Coil Style [Choose an item]
Fan Coil Control [Choose an item]
Quantity:
  1. Fan Coil Style [Choose an item]
Fan Coil Control [Choose an item]
Quantity:
  1. Fan Coil Style [Choose an item]
Fan Coil Control [Choose an item]
Quantity:
  1. Terminal Unit Coils (Reheat Coils):
Not Applicable(Check this box and erase details below if this system does not exist in the building)
  1. Heating-Cooling Medium/Source [Choose an item]
Primary Control [Choose an item]
Primary Configuration [Choose an item]
Primary Coil Energy Transfer to Air: Units [Choose an item]
Heating-Cooling Medium/Source [Choose an item]
Secondary Control [Choose an item]
Secondary Configuration [Choose an item]
Secondary Coil Energy Transfer to Air: Units [Choose an item]
Additional Remarks:
  1. Heating-Cooling Medium/Source [Choose an item]
Primary Control [Choose an item]
Primary Configuration [Choose an item]
Primary Coil Energy Transfer to Air: Units [Choose an item]
Heating-Cooling Medium/Source [Choose an item]
Secondary Control [Choose an item]
Secondary Configuration [Choose an item]
Secondary Coil Energy Transfer to Air: Units [Choose an item]
Additional Remarks:
  1. Heating-Cooling Medium/Source [Choose an item]
Primary Control [Choose an item]
Primary Configuration [Choose an item]
Primary Coil Energy Transfer to Air: Units [Choose an item]
Heating-Cooling Medium/Source [Choose an item]
Secondary Control [Choose an item]
Secondary Configuration [Choose an item]
Secondary Coil Energy Transfer to Air: Units [Choose an item]
Additional Remarks:
  1. Heating-Cooling Medium/Source [Choose an item]
Primary Control [Choose an item]
Primary Configuration [Choose an item]
Primary Coil Energy Transfer to Air: Units [Choose an item]
Heating-Cooling Medium/Source [Choose an item]
Secondary Control [Choose an item]
Secondary Configuration [Choose an item]
Secondary Coil Energy Transfer to Air: Units [Choose an item]
Additional Remarks:
  1. Radiant Heating (Separate from TU Zone Control):
Not Applicable(Check this box and erase details below if this system does not exist in the building)
  1. Heating Type [Choose an item]
Effective Length [Choose an item] Units [Choose an item]
Surface Area Heated: Units [Choose an item]
Control [Choose an item]
Quantity:
Zone Names:
  1. Heating Type [Choose an item]
Effective Length [Choose an item] Units [Choose an item]
Surface Area Heated: Units [Choose an item]
Control [Choose an item]
Quantity:
Zone Names:
  1. Heating Type [Choose an item]
Effective Length [Choose an item] Units [Choose an item]
Surface Area Heated: Units [Choose an item]
Control [Choose an item]
Quantity:
Zone Names:
  1. Overhead Cooling:
Not Applicable(Check this box and erase details below if this system does not exist in the building)
  1. Cooling Type [Choose an item]
Effective Length [Choose an item] Units [Choose an item]
Surface Area Cooled: Units [Choose an item]
Control [Choose an item]
Quantity:
Zone Names:
  1. Cooling Type [Choose an item]
Effective Length [Choose an item] Units [Choose an item]
Surface Area Cooled: Units [Choose an item]
Control [Choose an item]
Quantity:
Zone Names:
  1. Cooling Type [Choose an item]
Effective Length [Choose an item] Units [Choose an item]
Surface Area Cooled: Units [Choose an item]
Control [Choose an item]
Quantity:
Zone Names:
  1. HVAC Controls: Terminal Unit (TU) Controller

  1. Controller Type [Choose an item]
Man-To-Machine Interface [Choose an item]
Historic Data Collection [Choose an item]
Historic Data Available Memory Capacity [Choose an item]
Remote Access [Choose an item]
Additional Remarks:
  1. Current control points

Table 2a – Current System | AHU Control Points: