1. Daniel Dao

2.  Provide diagnostic reports of units that need attention.  Identify units that are damaging compressors- the most costly part of any air conditioner to repair  Help locations reduce energy consumption and greenhouse gas emissions.  Extend equipment life by having more informed maintenance decisions.  Reduce equipment downtime and emergency repair expense by mitigating the risk of compressor failures and other catastrophic failures.  Manage with electronic unit performance records and service histories.  Contribute to improved indoor air quality and comfort, which will lead to a more enjoyable experience for employees or customers. Performance You Can See:

3. Pro-Active MaintenancePredictive Maintenance Preventive Maintenance - Standard Offering Source level of PM offerings: On-Call/On-Demand Maintenance (Customer Manage) Just-In-Time Maintenance (Source Manage)

4. Preventive Maintenance Customer stated Statement Of Work or Standard Source Preventive Maintenance Standard HVAC tool analysis on every service calls 2 points of measurement No active monitoring Standard report generation Service verification as scheduled Predictive Maintenance Source Standard Preventive Maintenance offering Audit tool 1 time connection before and after set up (done annually during Spring) 9 points of measurement, HVAC equipment performance verification by Source No active monitoring Online report for equipment data performance and energy savings (subscription for access to historic information) Online service verification (included with Source services) and per use basis with a different SERVICE PROVIDER Pro-active Maintenance Customer stated Statement Of Work or Standard Source Preventive Maintenance Audit tool 1 time connection before and after set up (done annually during Spring) Continuous active data measurement and monitoring with controls installation onto RTUs or pulling data from current installed controls Active monitoring for issues and notify the SERVICE PROVIDER for service Online report for equipment data performance and energy savings (subscription for access to historic information) Source becomes the monitoring agent or third party data analyzed and communicated to our customer SOURCE HVAC PM PROGRAM features:

5. Source Scope of Work-Scheduled Maintenance: Preventive Maintenance Work Performed Quarterly: 1. lnspection of compressor oil and refrigerant levels. 2. Check all pressures, select temperatures, Note and report any deficiencies. 3. Verify crankcase heater operations (amps if applicable). 4. Check and log receiver levels on refrigerant condensing units 5. Visual inspection of refrigeration circuit for signs of oil leaks. 6. Check all valve caps and Schrader caps for system integrity. 7. lnspection of the system wiring, controls, and relays. Tighten and repair connections as needed. Note and report any defects. 8. Check condenser fan motors, lubricate as needed. 9. Visual inspection of the evaporator fan motors, belts and blades 10. Visual inspections of the condenser tube bundles and coils. 11. Blow out and verify drainage of condensate drain lines on all HVAC equipment and prime all P-traps 12. Change 1 Replace HVAC Air Filter every Quarter. (Pleated filters) 13. Check Supply and return air temperatures and record in Maintenance Log.(where applicable) 14. Check economizer damper operation annually and adjust linkage. 15. Check for carbon monoxide leakage annually. Check gas fired burners and heat exchangers along with gas pressure annually Check internal unit control operation and function Clean out Condensation Drain pans.

6. Preventive Maintenance Work Performed Annually: 1. Inspection, cleaning, and tightening of electrical components and terminals such as contactors, breakers, and computerized devices. 2. Leak check refrigerant systems with electronic leak detector 3. Check net oil pressure of compressors if applicable. 4. Clean evaporator coils, drain pans, and check drain flow. (As needed basis) 5. Validation of safety circuits such as high and low pressure controls. 6. Replace belts and adjust ventilator fans.(lncluding swamp coolers Bi-annual) 7. Lubricate bearings and replace belts every year.(lncluding swamp coolers) 8. Clean Condenser coils with cleaner. (As needed basis) Typical Exclusions: The following items are not covered by typical maintenance agreement: 1. Bearings 2. Emergency repairs and lor services are not covered by this agreement, but will be provided on a time and material basis or by special quote as your needs require. The base charge will be waived on repairs performed at the same of scheduled maintenance. 3. Electrical service, disconnects, circuit breakers, wiring, conduits from the main panel to each unit or cooler. 4. Replacement of equipment, motors, components, and refrigerant. 5. Abandoned A/C units and equipment 6. Anything not specifically mentioned in this proposal 7. Acts of god, neglect or abuse Source Scope of Work-Scheduled Maintenance:

7. Source Preventive Maintenance process: Technician hooks up the standard HVAC tools to the equipment Technician analyzes the readings from the tool and calculates against the P- T chart Technician performs the maintenance and fixes the problem.

8. Low-side pressure High-side pressure Charging hose 2 measurements to use with manual P-T Chart calculations + Pocket P-T Chart Source Preventive Maintenance process:

9. Preventive Maintenance Customer stated Statement Of Work or Standard Source Preventive Maintenance Standard HVAC tool analysis on every service calls 2 points of measurement No active monitoring Standard report generation Service verification as scheduled Predictive Maintenance Source Standard Preventive Maintenance offering Audit tool 1 time connection before and after set up (done annually during Spring) 9 points of measurement, HVAC equipment performance verification by Source No active monitoring Online report for equipment data performance and energy savings (subscription for access to historic information) Online service verification (included with Source services) and per use basis with a different SERVICE PROVIDER Pro-active Maintenance Customer stated Statement Of Work or Standard Source Preventive Maintenance Audit tool 1 time connection before and after set up (done annually during Spring) Continuous active data measurement and monitoring with controls installation onto RTUs or pulling data from current installed controls Active monitoring for issues and notify the SERVICE PROVIDER for service Online report for equipment data performance and energy savings (subscription for access to historic information) Source becomes the monitoring agent or third party data analyzed and communicated to our customer SOURCE HVAC PM PROGRAM features:

10. Source Predictive Maintenance process: Technician hooks up the HVAC performance audit tool to each HVAC circuit. Test-In and Test-Out. Measurement points are taken by the tool and analyzed through the built-in patented algorithms. Data are synchronized with a Source managed-data server for detailed analysis of the system and energy savings. Technician performs the maintenance work and fixes any problem. Facility owners will receive documentation on the operating conditions of every unit and circuit.

11. The Tune-up Process 1. Test-in – Skilled technician measures and records refrigeration cycle performance and performs a comprehensive maintenance inspection. 2. Unit Repairs – If there are a significant number of dysfunctional refrigeration cycles, units are repaired and upon completion, the tune-up continues. 3. Coil Cleaning – Indoor and outdoor coils are thoroughly cleaned. Utilizing a power washer and appropriate cleaning solution will maximize the effectiveness of the coil cleaning. Technician cleans condensate drains and changes indoor air filters. 4. Refrigerant Charge/Airflow Adjustment – The Performance Audit tool will provide guidance about refrigerant charge and airflow adjustments. Adjustments are made until the tool indicates that the Efficiency Index and Capacity Index measurements are both greater than 90%. 5. If appropriate, Source technician completes economizer tune-up and adjusts changeover setting as indicated by diagnostic tool. 6. Upon successfully completing the Test-In, Coil Cleaning, Charge and Airflow Adjustments and Test-Out, the data is synchronized, preferably from the rooftop or job-site, to the Field Diagnostic database. Post Tune-up Follow-up With data available on the database, Source can analyze the cycle records for each refrigeration circuit and each unit tested. A suite of reports can be generated for managers and facility owners. Reports indicating outstanding equipment repairs and upgrade opportunities are also generated. Source Predictive Maintenance process:

12. Supply air Dry-bulb temp Wet-bulb temp Return air Dry-bulb temp Wet-bulb temp Low-side pressure High-side pressure Ambient temp Suction line temp (Superheat) Liquid line temp (Supercool) HVAC Performance Audit Tool Better measurements lead to a higher level of quality of diagnosis. 9 measurements with a built-in P-T Chart for quick calculations, error-free analysis, and quick reporting 9 measurements with a built-in P-T Chart for quick calculations, error-free analysis, and quick reporting Source Predictive Maintenance process:

13. Evaporating Temp Condensing Temp over Ambient Superheat Sub cooling Minimum acceptable values Maximum acceptable values Diagnostic Measurements Goal values: The line in the middle of a graph is the goal value for that quantity. In this case the evaporating temperature goal value is 45°F. Dollar Savings - The software calculates the dollar value for bringing the “EI” and “CI” to 100. In this case a 10 SEER seven and a half ton unit running 1500 hours a year on 15 cent kilowatts would use $681 in additional energy in a year running as it is now. This is because it is running with 72% efficiency and 84% capacity Source Predictive Maintenance process: Efficiency is a measure of how much power is used to produce a standard amount of refrigeration capacity. The efficiency index (EI) is the ratio of how efficient the unit is currently running as compared to how efficient it would be if all the graphed values were at their goals under the current driving conditions. The driving conditions are the conditions that materially affect the expected operation of the air conditioner. The driving conditions are the ambient temperature and the return air wet bulb temperature. Impact of Running With Faults Variables used to calculate EI and CI to dollar of savings potential

14. 14 System provides efficiency and capacity ratings along with the number of potential compressor failures. Translate this into potential $$$$$ savings! –Example: Store 5525 has $12,000.00 potential compressor savings and $4,000.00 potential energy savings In-Depth Equipment Management Reporting Source Predictive Maintenance process:

15. 15 Source Predictive Maintenance process: HVAC Performance Verification: Automated Fault Detection & Diagnostics for Refrigeration Cycles Validate Your Equipment Repair for System Performance Document Energy Savings Minimize Compressor Failures Manage Your Cost and Budgeting effectively Easy & Effective Reporting Easily determine the performance of existing HVAC equipment and circuit Accurately diagnose problems and document the repairs Reduce Maintenance Costs Reduce electrical cost Reduce compressor replacements Reduce summer overtime repairs Improve summer indoor temperatures

16. HVAC Performance Audit Tool is tested and approved to work on virtually any size constant volume equipment with the following configuration: It must have an air-cooled condenser. It must have direct expansion evaporators (no chillers for now). It must have a positive displacement compressor. That is a reciprocating compressor, scroll, or a screw compressor. It work with all the refrigerants commonly used in comfort cooling including both R22 and R410A. HVAC Performance Audit Tool is tested and approved for air-to-air space cooling applications, which includes DX air cooled commercial rooftop package units, commercial and residential split systems and heat pumps. Additionally, there is a software application available for working on water cooled units that require accessory entering and leaving condenser water temperature sensors. HVAC Performance Audit Tool is not approved for use with ductless split systems.  Working on multi-zone equipment, that is equipment with unloaders accessories that vary compressor capacity and Variable Frequency Drives (VFDs) that vary the airflow through the unit complicates the analysis.

17. Preventive Maintenance Customer stated Statement Of Work or Standard Source Preventive Maintenance Standard HVAC tool analysis on every service calls 2 points of measurement No active monitoring Standard report generation Service verification as scheduled Predictive Maintenance Source Standard Preventive Maintenance offering Audit tool 1 time connection before and after set up (done annually during Spring) 9 points of measurement, HVAC equipment performance verification by Source No active monitoring Online report for equipment data performance and energy savings (subscription for access to historic information) Online service verification (included with Source services) and per use basis with a different SERVICE PROVIDER Pro-active Maintenance Customer stated Statement Of Work or Standard Source Preventive Maintenance Audit tool 1 time connection before and after set up (done annually during Spring) Continuous active data measurement and monitoring with controls installation onto RTUs or pulling data from current installed controls Active monitoring for issues and notify the SERVICE PROVIDER for service Online report for equipment data performance and energy savings (subscription for access to historic information) Source becomes the monitoring agent or third party data analyzed and communicated to our customer SOURCE HVAC PM PROGRAM features:

18. Source Pro-Active Maintenance process: Technician hooks up the HVAC performance audit tool to each HVAC circuit. Test-In and Test-Out Measurement points are taken by the tool and analyzed through the built-in patented algorithms. Data are synchronized with a Source managed- data server for detailed analysis of the system and energy savings. Technician performs the maintenance work and fixes any problem Facility owners will receive documentation on the operating conditions of every unit and circuit.

20. 20  18 package air conditioning units  318 Tons of air conditioning  Average unit is only running 79% efficient  $17,561.00 potential energy savings  21 compressors are running in a condition where they are destroying themselves  Estimated cost to replace one compressor $7,000.00  Rebates available from SCE up to $9,800.00 to tune up and audit a store of this footprint

21. 21 Clean outdoor coils, adjust indoor fan output and adjust refrigerant charge recommend repairs to increase efficiency 18 units $9,900.00 Clean outdoor coils, adjust indoor fan output and adjust refrigerant charge recommend repairs to increase efficiency 18 units $9,900.00 Mechanical repairs $ Unknown?? Mechanical repairs $ Unknown?? Minimum SCE rebate available $5,088.00 Minimum SCE rebate available $5,088.00 Potential energy savings Potential energy savings $17,561.00 Potential compressor replacement savings $21,000.00 Potential compressor replacement savings $21,000.00 Using 50% of potential energy savings and min rebate the audit has a payback of 8.5 months Using 50% of potential energy savings and min rebate the audit has a payback of 8.5 months

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