Certified HVAC Audit Report Key Takeaways and Implications. Created for: Pets On the Go 445 Logging Road, Building 3 Yardley, PA-19034

Transcription

1 Certified HVAC Audit Report Key Takeaways and Implications Created for: Pets On the Go 44 Logging Road, Building 3 Yardley, PA-9034 May, 0

2 Executive Summary Proposal Generator Demo aims to reduce your energy consumption, decrease operating costs and maximize your asset knowledge to allow you to more effectively plan for both capital and operational spend. Inspection Results The Proposal Generator Demo has inspected 6 package HVAC units at Pets On The Go. These were tested on January 9, 006. Advanced fault detection and diagnostic algorithms were used to assess the performance of your mechanical systems. As a result of this testing, 0 of those units were found to be running optimally*. The remaining 6 units, or 0%, were found to be running inefficiently. Key Findings 0 units running optimally 6 units running inefficiently units are at operational risk 4 units require upgrades 3 units require replacement Impact Cost/ found are described in detail in this report. The financial implications of these recommendations are as follows: Total Upgrades Total Repairs Total Replacements $,960 $4,939 / yr 0.8 yrs $760 $,864 / yr 0.3 yrs $4,00 $8,4 / yr 3-4 yrs Based on the finding described in this report, addressing sub-optimal operational conditions would result in the following: Reduced Spending,,4 Reduced CO Emissions,4 Tree Equivalency,4 Barrels of Oil Equivalency,4 Reduced Operational Risk 3 Cost Payback Period Repairs/Upgrades $7, / yr 39,4 lbs / yr,640 trees $393 / yr $33,9 / yr 3,9 lbs / yr,99 trees Includes service cost for replacements. Upgrades, replacements and/or repairs refer to the Environmental Impact page. 3 Operational risk is defined as the benefits of reducing premature compressor failures. Other risks may exist. 4 Only DCV upgrade savings are taken into account when economizer repair opportunities are also present. 47 Repairs/Upgrades or Replacements 43 In order for a unit to be considered running optimally, all circuits must be running in acceptable condition and the economizer must be functioning properly.

3 Environmental Impact Proposal Generator Demo is dedicated to protecting the environment with a comprehensive and contemporary commitment. This is one of the central tenets of how we do business throughout the world. Environmental stewardship means acting in a way that is both productive and sustainable. In fact, our solutions and technologies expand sustainable capacity and improve the efficiency of products and processes, fostering Sustainable Opportunity. Our products and services help conserve energy, reduce waste, and protect our offices. We help other companies become more efficient and productive with our products and solutions. Our processes identify and address risks and promote a culture of safety excellence. Environmental Impact This amounts to improvements in energy efficiency that have a real impact on the earth. The impact is as follows: Upgrades Repairs Replacements Reduction in CO 8,98 lbs / yr,8 lbs / yr 8,866 lbs / yr Trees Equivalency,399 trees 97 trees trees This much of a savings in carbon dioxide (CO) emitted into the atmosphere. The amount of CO sequestered by this many ten-year-old medium growth coniferous trees. 3 Equivalent to avoiding the CO emissions from consuming this number of barrels of crude oil. Barrels of Oil Equivalency 3 7 0

4 Comparison of Unit Condition Date of Inspections: January 9, 006 As a result of this testing, 0 were found to be running optimally. The remaining 6 units, or 0%, were found to be running inefficiently. Alerts Legend Service Legend Operational Risk Caution (general) Caution (recover charge) Caution (tune up lowside) Energy Opportunity Caution (leak check and repair) Caution (major repair) Caution (tune up high-side) Proper Operation Acceptable (no repair needed) Has at least one unacceptable refrigeration diagnostic parameter. Requires no service and is operating within acceptable ranges of efficiency and capacity. Unit 3 RTU Alerts Carrier Carrier Carrier 48DJE-0-60AA 48DJE-0-60AA 48DJE-0-60AA 00G G G684 Test Date January 9, 006 January 9, 006 January 9, 006 UPGRADE TSTAT RSTAT RSTAT RSTAT Econ DB DB DB Vent FV FV FV REPAIR Econ Repair Req. Yes No Yes Econ Fault 0 3 Age REPLACE RTU No No No Liquid Line Liquid Line Liquid Line Total Capacity(tons) Stage Stage Capacity (tons) PERFORMANCE INDICES EI % 9 > CI % RISK Premature Compressor Fail Evaporator Coil Freezing Cond. Hi. Press. Shutdown Inefficient Operation Insufficient Capacity Recommendations****

5 Comparison of Unit Condition Date of Inspections: January 9, 006 As a result of this testing, 0 were found to be running optimally. The remaining 6 units, or 0%, were found to be running inefficiently. Alerts Legend Service Legend Operational Risk Caution (general) Caution (recover charge) Caution (tune up lowside) Energy Opportunity Caution (leak check and repair) Caution (major repair) Caution (tune up high-side) Proper Operation Acceptable (no repair needed) Has at least one unacceptable refrigeration diagnostic parameter. Requires no service and is operating within acceptable ranges of efficiency and capacity. Unit 4 6 RTU Alerts Office Office Trane Trane York CDF40ER4 CDF40ER4 RT480WE34 44DR44 34ER RTY Test Date January 9, 006 January 9, 006 January 9, 006 UPGRADE TSTAT PSTAT PSTAT RSTAT Econ None None SSE Vent None None FV REPAIR Econ Repair Req. No No Yes Econ Fault 0 0 Age 0 0 REPLACE RTU Yes Yes Yes Fixed Liquid Line Liquid line Discharge Line Total Capacity(tons) Stage Stage Capacity (tons) 4. PERFORMANCE INDICES EI % 98 > CI % RISK Premature Compressor Fail Evaporator Coil Freezing Cond. Hi. Press. Shutdown Inefficient Operation Insufficient Capacity Recommendations****

6 Asset Detail and Recommendations Date of Inspections: January 9, 006 Recommended Repairs Economizer Unit Proposed Repairs Cost Payback Carrier 48DJE-0-60AA - Minimum position 0%, power on, outdoor damper not completely open. - Power off, outdoor damper not closed. $0 $4 /yr 0. yrs Total Capacity (tons) 00G Refrigeration Cycle of Stages Age Thermostat Economizer RSTAT DB No Refrigeration Cycle repairs. Ventilation FV Upgrade Opportunities Proposed Upgrades Cost Add PSTAT $380 Add SSE to PSTAT $,080 Add DSE to PSTAT $,00 Add DCV to PSTAT + DSE $,4 $, /yr $,847 /yr $,8 /yr $,483 /yr Payback 0. yrs 0.6 yrs 0. yrs 0.6 yrs Replacement Opportunities No Replacements recommended.

7 Asset Detail and Recommendations Date of Inspections: January 9, 006 Recommended Repairs Economizer Unit Total Capacity (tons) of Stages Age Thermostat Economizer Ventilation Carrier 48DJE-0-60AA 00G6840 RSTAT DB FV Refrigeration Cycle No Economizer repairs. Stage EI CI Proposed Repairs Cost Payback Recover Charge $0 $6 /yr 0. yrs Reduced Operational Risk Upgrade Opportunities $0 Proposed Upgrades Cost Add PSTAT $380 Add SSE to PSTAT $,080 Add DSE to PSTAT $,00 Add DCV to PSTAT + DSE $,4 $966 /yr $88 /yr $,076 /yr $,8 /yr Payback 0.4 yrs. yrs. yrs. yrs Replacement Opportunities No Replacements recommended.

8 Asset Detail and Recommendations Date of Inspections: January 9, 006 Site: Unit 3 Pets On the Go Carrier 48DJE-0-60AA Recommended Repairs Economizer Proposed Repairs - Minimum position 0%, power on, outdoor damper not completely open. - Power off, outdoor damper not closed. - Ambient sensor cold, call for cooling, unit not economizing. Cost Payback $ $39 /yr 0. yrs Total Capacity (tons) of Stages Age Thermostat Economizer Ventilation 00G684 RSTAT DB FV Refrigeration Cycle Stage EI CI Proposed Repairs Cost Payback Tune-Up $60 $79 /yr 0.3 yrs 6 6 Tune-Up $60 $494 /yr 0.3 yrs Reduced Operational Risk Upgrade Opportunities $9 Proposed Upgrades Cost Add PSTAT $380 Add SSE to PSTAT $,080 Add DSE to PSTAT $,00 Add DCV to PSTAT + DSE $,4 $,004 /yr $9 /yr $,4 /yr $,96 /yr Payback 0.4 yrs. yrs. yrs. yrs Replacement Opportunities No Replacements recommended.

9 Asset Detail and Recommendations Date of Inspections: January 9, 006 Recommended Repairs Economizer Unit 4 Total Capacity (tons) of Stages Age Thermostat Economizer Ventilation Office Trane CDF40ER4 44DR PSTAT None None Refrigeration Cycle No Economizer repairs. Stage EI CI Proposed Repairs Cost Payback Leak Check & Repair $30 -- /yr -- Reduced Operational Risk Upgrade Opportunities $0 No Upgrades recommended. Replacement Opportunities Proposed Replacements Cost Energy Avg. Yr Payback 3 SEER $34,300,34 kwh/yr $7,99 /yr 4- yrs SEER $9,400 9,77 kwh/yr $7,064 /yr 4- yrs SEER $44,0 3,834 kwh/yr $7,67 /yr -6 yrs 4 SEER $39,00,669 kwh/yr $7,00 /yr -6 yrs + SEER $49,000 4,8 kwh/yr $7,88 /yr 6-7 yrs SEER $4,00,679 kwh/yr $6,4 /yr 3-4 yrs The Average Annual Yr represents the average annual (energy + repair) savings over a year period.

10 Asset Detail and Recommendations Date of Inspections: January 9, 006 Recommended Repairs Economizer Unit Total Capacity (tons) of Stages Age Thermostat Economizer Ventilation Office Trane CDF40ER4 34ER PSTAT None None Refrigeration Cycle No Economizer repairs. Stage EI CI Proposed Repairs Cost Payback Major Repair -- $7 /yr -- Reduced Operational Risk Upgrade Opportunities $ No Upgrades recommended. Replacement Opportunities Proposed Replacements Cost Energy Avg. Yr Payback 3 SEER $3,00,844 kwh/yr $6,77 /yr 4- yrs SEER $7,000,9 kwh/yr $6,333 /yr 4- yrs SEER $40,00 3,668 kwh/yr $6,80 /yr -6 yrs 4 SEER $36,000,473 kwh/yr $6,67 /yr -6 yrs + SEER $4,000 4,806 kwh/yr $7,0 /yr 6-7 yrs SEER $,00 6,3 kwh/yr $,778 /yr 3-4 yrs The Average Annual Yr represents the average annual (energy + repair) savings over a year period.

11 Asset Detail and Recommendations Date of Inspections: January 9, 006 Recommended Repairs Economizer Unit 6 Proposed Repairs Cost Payback Total Capacity (tons) of Stages Age Thermostat Economizer Ventilation York RT480WE34 4RTY RSTAT SSE FV - Ambient sensor cold, call for cooling, unit not economizing. $0 $0 /yr.0 yrs Refrigeration Cycle Stage EI CI Proposed Repairs Cost Payback 4 Tune-Up $0 $94 /yr 0. yrs Reduced Operational Risk Upgrade Opportunities $0 Proposed Upgrades Cost Add PSTAT $380 Add DSE to PSTAT $,00 Add DCV to PSTAT + DSE $,4 $449 /yr $40 /yr $7 /yr Payback 0.8 yrs. yrs. yrs Replacement Opportunities Proposed Replacements Cost Energy Avg. Yr Payback 4 SEER $,000 4,877 kwh/yr $4,4 /yr -3 yrs 3 SEER $,00 4,63 kwh/yr $4,37 /yr -3 yrs SEER $9,000 4,344 kwh/yr $4,33 /yr -3 yrs + SEER $,000,76 kwh/yr $4,47 /yr 3-4 yrs SEER $3,00,090 kwh/yr $4,444 /yr 3-4 yrs SEER $7,00 3,98 kwh/yr $4,0 /yr - yrs The Average Annual Yr represents the average annual (energy + repair) savings over a year period.

12 Detailed Unit Information Date of Inspection: Jan 9, 006 Job: Pre-Test ACCEPTABLE: Safe and reasonable performance. Unit - Stage Unit Performance Carrier 48DJE-0-60AA 00G6839 Performance Parameter Efficiency Index (EI) Capacity Index (CI) 9% 93% Potential Energy $9 /yr Reduced Operational Risk $ 0 /yr Refrigerant Capacity (tons) Recommended Service R Liquid Line ACCEPTABLE/No repair needed: Safe and reasonable performance because the data indicates this system is performing as expected given the conditions entered. No further system diagnostics are required. Diagnostics Parameter Goal Evaluation Evap Temp (ET) 4.7F 46.F Ok- Superheat (SH) 3.3F 0.0F Ok- Condenser Temp (CT) 7.9F N/A Subcooling (SC) 4.9F.0F Ok+ Indoor Temp. Diff. (ITD) N/A Condenser Over Ambient (COA) 0.9F 4.4F Ok- Measurement Suction Pressure (SP) Liquid/Discharge Pressure (LP/DP) Suction Temp (ST) Liquid Temp (LT) Ambient Temp (AMB) Return Air (RA) Supply Air (SA) Return Air Wet Bulb Temp (RWB) Supply Air Web Bulb Temp (SWB) 7.0psig 9.9psig.0F 93.0F 87.0F 66.0F Legend is applicable to the refrigeration cycle test conducted on this circuit.

13 Detailed Unit Information Date of Inspection: Jan 9, 006 Job: Pre-Test ACCEPTABLE: Safe and reasonable performance. Unit - Stage Unit Performance Carrier 48DJE-0-60AA 00G6839 Performance Parameter Efficiency Index (EI) Capacity Index (CI) >98% 94% Potential Energy -- Reduced Operational Risk $ 0 /yr Refrigerant Capacity (tons) Recommended Service R Liquid Line ACCEPTABLE/No repair needed: Safe and reasonable performance because the data indicates this system is performing as expected given the conditions entered. No further system diagnostics are required. Diagnostics Parameter Goal Evaluation Evap Temp (ET) 4.3F 46.3F Ok- Superheat (SH) 7.6F 0.0F Ok- Condenser Temp (CT).4F N/A Subcooling (SC).4F.0F Ok+ Indoor Temp. Diff. (ITD) N/A Condenser Over Ambient (COA) 6.F 4.4F Ok- Measurement Suction Pressure (SP) Liquid/Discharge Pressure (LP/DP) Suction Temp (ST) Liquid Temp (LT) Ambient Temp (AMB) Return Air (RA) Supply Air (SA) Return Air Wet Bulb Temp (RWB) Supply Air Web Bulb Temp (SWB) 7.9psig 00.0psig 9.9F 89.0F 84.9F 66.0F Legend is applicable to the refrigeration cycle test conducted on this circuit.

14 Detailed Unit Information Date of Inspection: Jan 9, 006 Job: Pre-Test ACCEPTABLE: Safe and reasonable performance. Unit - Stage Unit Performance Carrier 48DJE-0-60AA 00G6840 Performance Parameter Efficiency Index (EI) Capacity Index (CI) 87% 9% Potential Energy $3 /yr Reduced Operational Risk $ 0 /yr Refrigerant Capacity (tons) Recommended Service R Liquid Line ACCEPTABLE/No repair needed: Safe and reasonable performance because the data indicates this system is performing as expected given the conditions entered. No further system diagnostics are required. Diagnostics Parameter Goal Evaluation Evap Temp (ET) 4.9F 4.7F Ok- Superheat (SH).F 0.0F Ok- Condenser Temp (CT) 7.F N/A Subcooling (SC) 8.F.0F Ok- Indoor Temp. Diff. (ITD) N/A Condenser Over Ambient (COA) 30.F 4.F Ok+ Measurement Suction Pressure (SP) Liquid/Discharge Pressure (LP/DP) Suction Temp (ST) Liquid Temp (LT) Ambient Temp (AMB) Return Air (RA) Supply Air (SA) Return Air Wet Bulb Temp (RWB) Supply Air Web Bulb Temp (SWB) 7.9psig 49.9psig 8.0F 9.0F 87.0F 6.0F Legend is applicable to the refrigeration cycle test conducted on this circuit.

15 Detailed Unit Information Date of Inspection: Jan 9, 006 Job: Pre-Test CAUTION: Recover charge. Unit - Stage Unit Performance Carrier 48DJE-0-60AA 00G6840 Performance Parameter Efficiency Index (EI) Capacity Index (CI) 73% 93% Potential Energy $6 /yr Reduced Operational Risk $ 0 /yr Refrigerant Capacity (tons) Recommended Service R Liquid Line CAUTION/Recover Charge: Recover charge because this is a unit with a hot condenser and high subcooling. Diagnostics Parameter Goal Evaluation Evap Temp (ET) 40.3F 44.0F Ok- Superheat (SH) 3.6F 0.0F Ok- Condenser Temp (CT) 8.F N/A Subcooling (SC) 9.F.0F Hi Indoor Temp. Diff. (ITD) N/A Condenser Over Ambient (COA) 40.3F 3.3F Hi Benefits - Protect against high head cut-off on hot day because condenser is running hot - Enhance performance by charging to industry standards. Measurement Suction Pressure (SP) Liquid/Discharge Pressure (LP/DP) Suction Temp (ST) Liquid Temp (LT) Ambient Temp (AMB) Return Air (RA) Supply Air (SA) Return Air Wet Bulb Temp (RWB) Supply Air Web Bulb Temp (SWB) 69.0psig 89.9psig 3.9F 9.0F 87.9F 63.0F Legend is applicable to the refrigeration cycle test conducted on this circuit.

16 Detailed Unit Information Date of Inspection: Jan 9, 006 Job: Pre-Test CAUTION: Low-side heat transfer problem. Unit 3 - Stage Unit Performance Carrier 48DJE-0-60AA 00G684 Performance Parameter Efficiency Index (EI) Capacity Index (CI) 63% 66% Potential Energy $79 /yr Reduced Operational Risk $7 /yr R Liquid Line CAUTION/Tune up lowside: Low-side heat transfer problem because this is a unit with low ET and SH is less than goal. Consider increasing indoor airflow by replacing filters, cleaning fan, cleaning evap coil, adjusting fan belt, and/or opening registers. Benefits Refrigerant Capacity (tons) Recommended Service - Protect compressor from premature failure due to liquid floodback - Protect evaporator coil from freezing because evaporator is running cold. Diagnostics Parameter Goal Evaluation Evap Temp (ET).6F 44.8F Lo Superheat (SH) 3.4F 0.0F Lo Condenser Temp (CT) 9.F N/A Subcooling (SC).F.0F Ok+ Indoor Temp. Diff. (ITD) N/A Condenser Over Ambient (COA).F 3.7F Ok Measurement Suction Pressure (SP) Liquid/Discharge Pressure (LP/DP) Suction Temp (ST) Liquid Temp (LT) Ambient Temp (AMB) Return Air (RA) Supply Air (SA) Return Air Wet Bulb Temp (RWB) Supply Air Web Bulb Temp (SWB) 44.9psig 4.0psig.0F 98.0F 87.0F 64.0F Legend is applicable to the refrigeration cycle test conducted on this circuit.

17 Detailed Unit Information Date of Inspection: Jan 9, 006 Job: Pre-Test CAUTION: Low-side heat transfer problem. Unit 3 - Stage Unit Performance Carrier 48DJE-0-60AA 00G684 Performance Parameter Efficiency Index (EI) Capacity Index (CI) 6% 6% Potential Energy $494 /yr Reduced Operational Risk $7 /yr R Liquid Line CAUTION/Tune up lowside: Low-side heat transfer problem because this is a unit with low ET and SH is less than goal. Consider increasing indoor airflow by replacing filters, cleaning fan, cleaning evap coil, adjusting fan belt, and/or opening registers. Benefits Refrigerant Capacity (tons) Recommended Service - Protect compressor from premature failure due to liquid floodback - Protect evaporator coil from freezing because evaporator is running cold. Diagnostics Parameter Goal Evaluation Evap Temp (ET) 9.9F 46.4F Lo Superheat (SH) 8.F 0.0F Lo Condenser Temp (CT) 4.7F N/A Subcooling (SC) 8.7F.0F Ok- Indoor Temp. Diff. (ITD) N/A Condenser Over Ambient (COA) 8.8F 4.4F Ok- Measurement Suction Pressure (SP) Liquid/Discharge Pressure (LP/DP) Suction Temp (ST) Liquid Temp (LT) Ambient Temp (AMB) Return Air (RA) Supply Air (SA) Return Air Wet Bulb Temp (RWB) Supply Air Web Bulb Temp (SWB) 43.0psig.0psig 8.0F 96.0F 8.9F 66.0F Legend is applicable to the refrigeration cycle test conducted on this circuit.

18 Detailed Unit Information Date of Inspection: Jan 9, 006 Job: Pre-Test CAUTION: Add charge, if decreasing superheat can be tolerated (difficult diagnosis). Unit 4 - Stage Unit Performance Office Trane CDF40ER4 44DR44 Performance Parameter Efficiency Index (EI) Capacity Index (CI) 98% 93% Potential Energy -- Reduced Operational Risk $ 0 /yr R Liquid Line CAUTION/Leak Check and Repair: Add charge, if decreasing superheat can be tolerated (difficult diagnosis) because this is a unit with low subcooling and superheat is already below the goal value and will decrease more if charge is added. Benefits Refrigerant Capacity (tons) Recommended Service - Enhance performance by charging to industry standards. Diagnostics Parameter Goal Evaluation Evap Temp (ET) 43.6F 48.F Ok- Superheat (SH).4F 0.0F Ok- Condenser Temp (CT) 7.9F N/A Subcooling (SC) 3.0F.0F Lo Indoor Temp. Diff. (ITD) N/A Condenser Over Ambient (COA) 8.9F.0F Ok- Measurement Suction Pressure (SP) Liquid/Discharge Pressure (LP/DP) Suction Temp (ST) Liquid Temp (LT) Ambient Temp (AMB) Return Air (RA) Supply Air (SA) Return Air Wet Bulb Temp (RWB) Supply Air Web Bulb Temp (SWB) 73.9psig 9.9psig.0F 4.9F 89.0F 68.0F Legend is applicable to the refrigeration cycle test conducted on this circuit.

19 Detailed Unit Information Date of Inspection: Jan 9, 006 Job: Pre-Test ACCEPTABLE: Safe and reasonable performance. Unit 4 - Stage Unit Performance Office Trane CDF40ER4 44DR44 Performance Parameter Efficiency Index (EI) Capacity Index (CI) >98% 96% Potential Energy -- Reduced Operational Risk $ 0 /yr Refrigerant Capacity (tons) Recommended Service R Liquid Line 4. ACCEPTABLE/No repair needed: Safe and reasonable performance because the data indicates this system is performing as expected given the conditions entered. No further system diagnostics are required. Diagnostics Parameter Goal Evaluation Evap Temp (ET) 43.6F 46.8F Ok- Superheat (SH).4F 0.0F Ok- Condenser Temp (CT) 7.9F N/A Subcooling (SC) 8.0F.0F Ok- Indoor Temp. Diff. (ITD) N/A Condenser Over Ambient (COA) 8.9F 4.F Ok- Measurement Suction Pressure (SP) Liquid/Discharge Pressure (LP/DP) Suction Temp (ST) Liquid Temp (LT) Ambient Temp (AMB) Return Air (RA) Supply Air (SA) Return Air Wet Bulb Temp (RWB) Supply Air Web Bulb Temp (SWB) 73.9psig 9.9psig.0F 99.9F 89.0F 66.0F Legend is applicable to the refrigeration cycle test conducted on this circuit.

20 Detailed Unit Information Date of Inspection: Jan 9, 006 Job: Pre-Test ACCEPTABLE: Safe and reasonable performance. Unit - Stage Unit Performance Office Trane CDF40ER4 34ER68967 Performance Parameter Efficiency Index (EI) Capacity Index (CI) 9% 94% Potential Energy $6 /yr Reduced Operational Risk $ 0 /yr Refrigerant Capacity (tons) Recommended Service R Liquid line.0 ACCEPTABLE/No repair needed: Safe and reasonable performance because the data indicates this system is performing as expected given the conditions entered. No further system diagnostics are required. Diagnostics Parameter Goal Evaluation Evap Temp (ET) 4.3F 4.8F Ok- Superheat (SH) 6.6F 0.0F Ok- Condenser Temp (CT).7F N/A Subcooling (SC).8F.0F Ok Indoor Temp. Diff. (ITD) N/A Condenser Over Ambient (COA) 4.8F 4.F Ok Measurement Suction Pressure (SP) Liquid/Discharge Pressure (LP/DP) Suction Temp (ST) Liquid Temp (LT) Ambient Temp (AMB) Return Air (RA) Supply Air (SA) Return Air Wet Bulb Temp (RWB) Supply Air Web Bulb Temp (SWB) 7.9psig 3.0psig 8.9F.9F 87.9F 6.0F Legend is applicable to the refrigeration cycle test conducted on this circuit.

21 Detailed Unit Information Date of Inspection: Jan 9, 006 Job: Pre-Test CAUTION: Faulty valve. Unit - Stage Unit Performance Office Trane CDF40ER4 34ER68967 Performance Parameter Efficiency Index (EI) Capacity Index (CI) 84% 90% Potential Energy $7 /yr Reduced Operational Risk $ /yr R Liquid line.0 CAUTION/Major Repair: Faulty valve because this is a unit with low superheat. It could be caused by poor bulb mounting, improperly adjusted, stuck valve, or oversized valve. Benefits Refrigerant Capacity (tons) Recommended Service - Protect compressor from premature failure due to liquid floodback. Diagnostics Parameter Goal Evaluation Evap Temp (ET) 39.6F 46.4F Ok- Superheat (SH) 9.4F 0.0F Lo Condenser Temp (CT) 3.3F N/A Subcooling (SC).4F.0F Ok+ Indoor Temp. Diff. (ITD) N/A Condenser Over Ambient (COA) 7.4F 4.4F Ok+ Measurement Suction Pressure (SP) Liquid/Discharge Pressure (LP/DP) Suction Temp (ST) Liquid Temp (LT) Ambient Temp (AMB) Return Air (RA) Supply Air (SA) Return Air Wet Bulb Temp (RWB) Supply Air Web Bulb Temp (SWB) 68.0psig 37.0psig 49.0F.9F 8.9F 66.0F Legend is applicable to the refrigeration cycle test conducted on this circuit.

22 Detailed Unit Information Date of Inspection: Jan 9, 006 Job: Pre-Test CAUTION: Low-side heat transfer problem and add charge. Unit 6 - Stage Unit Performance York RT480WE34 4RTY Performance Parameter Efficiency Index (EI) Capacity Index (CI) 4% % Potential Energy $94 /yr Reduced Operational Risk $ 0 /yr Fixed R Discharge Line.0 CAUTION/Tune up lowside: Low-side heat transfer problem and add charge because ET is low, SH is ok and SC is less than goal. Fixing the low-side transfer problem will increase SH, so re-test after repairs to see if charge is needed to make SH ok. Consider increasing indoor airflow by replacing filters, cleaning fan and evap. coil, adjusting fan belt, and/or opening registers. Benefits Refrigerant Capacity (tons) Recommended Service - Protect evaporator coil from freezing because evaporator is running cold. Diagnostics Parameter Goal Evaluation Evap Temp (ET).F 46.0F Lo Superheat (SH).9F 6.7F Ok- Condenser Temp (CT).3F N/A Subcooling (SC) 3.4F.3F Lo Indoor Temp. Diff. (ITD) N/A Condenser Over Ambient (COA) 9.4F 8.7F Ok- Measurement Suction Pressure (SP) Liquid/Discharge Pressure (LP/DP) Suction Temp (ST) Liquid Temp (LT) Ambient Temp (AMB) Return Air (RA) Supply Air (SA) Return Air Wet Bulb Temp (RWB) Supply Air Web Bulb Temp (SWB) 33.9psig.9psig 3.0F.9F 8.9F 67.0F Legend is applicable to the refrigeration cycle test conducted on this circuit.

23 Additional Information Estimates of energy savings are based on the results of advanced diagnostic techniques and equipment inspections, as prescribed by FDSI. The HVAC repairs and upgrades recommended in this report are therefore based on actual performance data collected in the field by our service technicians. Recommended repairs and upgrades are consistent with protocols outlined in FDSI's Commercial HVAC Program. For Upgrades and Replacements only those opportunities that meet the established Payback/ROI criteria are presented on the report. For Repairs all available opportunities are displayed but the savings for opportunities is only presented if the established Payback/ROI criterion is met. Payback/ROI analysis is not available for units requiring 'Major Repairs' due to difficutly in estimating costs for such cases. All costs presented on the report are estimated. Economic analysis for replacement opportunities is based on average annual repair costs for a unit of the specified vintage. Each point on the Repair Vs Replacement graph represents the associated cumulative cost. Energy + Repair costs are considered for Repair Opportunities and Energy + Repair + Replacement costs for Replacement Opportunities. The point at which the costs cross over represents the payback period or the time it will take to recover the cost of replacing the unit as opposed to repairing it. Repair costs are per unit and do not accumulate if multiple stages need repair.

24 HVAC Measure Definitions Demand Control Ventillation (DCV) Control system upgrade that uses carbon dioxide (CO) sensors to adjust the supply of outdoor air to a conditioned space based on the actual occupancy of the room - the demand. In the process, the DCV system improves indoor air quality and saves energy that is normally wasted in ventillating unoccupied spaces. Economizers ECONOMIZER CONTROLLER: Mechanism that is used to control the device that opens or closes the outside-air and return-air damper system. Relief or exhaust air is most commonly allowed to escape through barometric dampers, although powered exhaust is not uncommon. The controller provides minimum outside air ventillation whenever the fan is running (the minimum position). Additionally, it senses the outside air and uses outside air to satisfy first stage cooling requirements when the air is suitable. The controller judges the outside air to be unsuitable for cooling when the energy contained in the air, the enthalpy of the air, exceeds the changeover set point (see below). ECONOMIZER SET POINTS: There are two set points on common economizer controls - the changeover set point on enthalpy controls (A, B, C or D) and the minimum position set point (0 to 0%). The changeover set point determines the point at which the outside air is no longer suitable to cool the building. The minimum position set point specifies the minimum position of the outside-air damper when the fan is running and outside-air conditions are not favorable for providing cooling to the building. DUAL ENTHALPY ECONOMIZER: Control system upgrade that allows the economizer to use outside air for cooling whenever the enthalpy (heat content) of the outside air is lower than the enthalpy of the inside air being returned to the HVAC unit for cooling. Efficiency Terms ENERGY EFFICIENCY RATIO (EER): A measure of cooling efficiency for air conditioning products. EER is calculated by dividing the cooling capacity in Btu s per hour (Btuh) by the power input in watts at a given set of rating conditions, expressed in Btuh per watt (Btuh/watt). SEASONAL ENERGY EFFICIENCY RATIO (SEER): A measure of cooling efficiency for air conditioning product. SEER is the total cooling output of an air conditioner during its normal annual usage period, in Btu s, divided by the total electric energy input in wattshours, during the same period. The higher the SEER rating number, the more energy efficient the unit. Programmable Thermostat A thermostat is a temperature activated switch. A programmable thermostat allows different temperature settings to automatically regulate the HVAC system at different preset times. Tune-Up TUNE-UP: For the purposes of the FDSI Commercial HVAC Program, adjustments made to HVAC units in response to identified refrigerant cycle faults. Tune-up measures include: cleaning coils; adjusting charge; and adjusting airflow. Performing regular HVAC tune-ups maximizes comfort, energy efficiency, indoor air quality, safety and equipment lifespan. EFFICIENCY INDEX (EI): A percentage estimate of actual equipment efficiency relative to the Benchmark Performance (EI = 0%) for the existing operating conditions. For example, an EI of 80% means a 0% efficiency improvement could be realized, if the equipment were properly serviced and problems were corrected. CAPACITY INDEX (CI): A percentage estimate of actual equipment capacity relative to the Benchmark Performance (CI = 0%) for the existing operating conditions. For example, a CI of 80% means a 0% capacity improvement could be realized, if the equipment were properly serviced and problems were corrected. ACCEPTABLE: SAFE AND REASONABLE PEROFRMANCE implies a safe and reasonably operating unit based on industry service standards which does not mean 'like new' efficiency which would correspond to 0%. It is possible to have an efficiency that is not optimal but allows the unit to have safe and reasonable performance. Such a unit could have available potential savings. attached to these units can be recouped through fine tuning the equipment.

25 Field Diagnostics Field Diagnostics 444 Oxford Valley Rd., Suite 300 Langhorne, PA () May 0 0 Field Diagnostics Images attributed to their respective authors, downloaded, and modified from the following URL. Cover Image: Sidebar Image: