Exhibit A - Comprehensive Maintenance Plan.pdf

Preventive Maintenance Checklist:

Asset Type: Air Handler

Description: AIR HANDLING UNIT (DIRECT DRIVE)

Frequency: Quarterly 1Estimated Time (hours):A17QUCode:

(T)ools, (S)afety Equipment and (M)aterials

Mechanics tool set.1

Vacuum and cleaning materials.2

Safety Guidelines

Schedule shutdown with operating personnel.1

De-energize, lock out and tag electrical circuit(s).2

Review and follow manufacturer OM instructions.3

Record equipment damage or deficiencies.4

Follow safety procedures for handling refrigerants (DX units only).5

Record results in the equipment history log.6

Maintenance Procedures

Check/clean/adjust grills, dampers, vanes, linkages are required.

Check temperatures and pressures.

Check for unusual noise/vibration.

Inspect for leaks.

Check condition of extended lubrication lines when present.

Restore to service.

Clean up work area and remove trash.

PM Checklist Page 1 of 1Printed Thursday, October 26, 2023 A17QU

Asset Type: Chiller, Air Cooled

Description: HYDRONIC MODULE

Frequency: Annual 3.5Estimated Time (hours):ACLCH12ANCode:

(T)ools, (S)afety Equipment and (M)aterials

Mechanic tool set.1

Cleaning materials.2

Distilled or purified water (refrigerant).3

Vacuum compressor oil. (IDEMITSU DAPHNE SUPERACEPACK 68)4

Safety Guidelines

Schedule work with operating personnel.1

Check with operating personnel for deficiencies.2

Follow site safety procedures and your supervisor’s instructions.3

Obtain and review manufacturer's instructions.4

Report any problems you find.5

Record the results in the equipment history log.6

Maintenance Procedures

Chiller:

Check door seals for damage.

Check water line clean the filter .

Check the cleaning of the exchanger and clean if necessary

Vacuum Pump and System:

Inspect the vacuum pump.

Check oil for contaminants and water.

Check V-belt tension and damage.

Check hose, hose clamp, and hose nipple for possible damage.

Check vacuum pump oil level. Add new oil in the amount of 200-300cc (7-10 oz).

WATER Pump:

Inspect and record bearing status on the Bearing Monitor.

Check the entire system if have any leak and repair if necessary

Valves:

Cycle valves and make sure they operate smoothly and function sufficiently.

Evaluate valve seats and actuator seals for replacement. Submit a work order if replacement is necessary.

Variable Speed Drive:

Check unit for damage or signs of overheating.

Check the main circuit and control circuits for tightness and signs of damage or overheating.

Check that unit is mounted securely.

Evaluate the cooling fan for replacement. Expected life is 61,000 hours. The hours can be checked on the inverter display.

Electrical Controls and Connections:

Check all electrical controls and connections for damage and tightness.

Operational Status:

PM Checklist Page 1 of 2Printed Friday, December 1, 2023 ACLCH12AN

Description: HYDRONIC MODULE

Frequency: Annual 3.5Estimated Time (hours):ACLCH12ANCode:

Check all control panel settings. Record and evaluate all alarms.

Check operation logs for indication of abnormal operation.

PM Checklist Page 2 of 2Printed Friday, December 1, 2023 ACLCH12AN

Asset Type: CHILLER

Description: HYDRONIC MODULE

Frequency: Monthly 1Estimated Time (hours):ACLCH12MOCode:

(T)ools, (S)afety Equipment and (M)aterials

Mechanic tool set.1

Cleaning materials.2

Distilled or purified water (refrigerant).3

Safety Guidelines

Schedule work with operating personnel.1

Check with operating personnel for deficiencies.2

Follow site safety procedures and your supervisor’s instructions.3

Obtain and review manufacturer's instructions.4

Report any problems you find.5

Record the results in the equipment history log.6

Maintenance Procedures

Check the Water Pump and change from Pump1 to Pump 2 or reverse

Check the system if have any leak and repair if necessary.

Variable Speed Drive:

Check unit for damage or signs of overheating.

Operational Status:

Check all control panel settings. Record and evaluate all alarms.

PM Checklist Page 1 of 1Printed Friday, December 1, 2023 ACLCH12MO

Description: GHP AIR COOLED CHILLER

Frequency: Annual 8Estimated Time (hours):ACLCH21ANCode:

(T)ools, (S)afety Equipment and (M)aterials

Mechanic Tool Set. Refrigeration tools.1

Pressure washer.2

Fin comb.3

Cleaning materials.4

Personal protective equipment (PPE) for handling refrigerants.5

Compressor oil.6

Oil filter.7

Access ladder.8

Halide Leak Detector,9

Electronic Leak Detector,10

Ultrasonic Noise Detector11

Tube Plugging Kit, Oil Filter12

Safety Guidelines

Schedule work with operating personnel.1

Follow site safety rules for lockout and tagout.2

Be very careful when climbing roof access ladders.3

Review and follow the manufacturer’s instructions.4

Follow safety and environmental rules for refrigerants.5

Don't vent refrigerants. Refrigerants must be recovered.6

Submit a work order if refrigerants need to be added.7

Report any problems you find.8

Record the results in the maintenance log.WARNING: EXTREME PRESSURE OR VACUUM MAY BE

PRESENT.

Maintenance Procedures

Monthly Procedure

Check the start of the endotermic engine and check exhaust for excessive black or white smoke.

Check when the Engine is on if have noise and vibrations.

Check head pressure.

Check suction pressure.

Check discharge pressure

Check chill water - intake.

Check operating temperatures.

Switch primary/secondary compressors and pumps.

Check hot gas bypass valve.

Check thermostatic expansion valve.

Check refrigerant level.

Check liquid line sight glass/moisture indicator.

PM Checklist Page 1 of 3Printed Friday, December 1, 2023 ACLCH21AN

Description: GHP AIR COOLED CHILLER

Frequency: Annual 8Estimated Time (hours):ACLCH21ANCode:

Check water lines.

Check compressor and heaters for proper operation.

Check compressor superheat on evaporator and economizer TXVs. Adjust as required

Check condenser coils for dyrt/ debris and clean if necessary

Check operation of all controls

Replace burned out indicator light

Semi-Annual Procedure

Check coolant level. Add as required.

Check coolant level. Add as required.

Inspect condition of fan and alternator belts and radiator hoses. Inspect belts for proper tension.

NOTE: If one fan belt requires replacing, replace all fan belts as a set.

Check the elctrical connection .

Inspect air filter. Clean or replace as necessary.

Inspect exhaust manifolds, mufflers and piping for leaks.

Take a Registration an half an hour of the work of the machine with the load and compare with the manifacturer data analisys.

Check programmable operating set points ans safety cutouts and make sure they are correct for the operation

Check compressor and heaters for proper operation

Check compressor super heat on evaporator and economizer TXVs. Adjust as required

Check condenser and economizer subcooling. Adjust as required

Leak check the chiller. Submit work order to find and repair leaks.

Annual Procedure

Check the Engine spark plugs conditions and replace if necessary.

Check the system in both seasonal functions by checking the energy consumption and compare the data with the manufacturer settings and adjast if necessary.

Clean tubes and test for leakage.

Calibrate chiller control system, load limiting system, and safety controls.

Check compressor oil on semi-hermetic compressors. Take oil samples and submit for analysis.

Replace oil filter, clean oil line strainer.

Check oil level in oil separator sight glass.

Clean and inspect the chiller:

Clean the condensing unit. Remove debris from air screen and clean underneath unit. Clear drain line and pan from sludge or debris.

Inspect system for signs of rust. Remove rust, prime with rust inhibitor, paint to match original condition. Carefully inspect all fasteners to ensure integrity and replace any which have rusted. All replacement components, parts, and materials should

Pressure wash coil with coil cleaning solution. Straighten fin tubes with fin comb.

Check and clean fan motors.

PM Checklist Page 2 of 3Printed Friday, December 1, 2023 ACLCH21AN

Description: GHP AIR COOLED CHILLER

Frequency: Annual 8Estimated Time (hours):ACLCH21ANCode:

Clean water strainers.

Cycle all valves two times.

Check electrical circuits:

Check all electrical connections for tightness.

Inspect condition of electrical contacts on motor starters and controls. Check electrical connections for tightness.

Relamp as necessary.

Perform operational test and return to service.

Check controller for proper operation.

Check programmable operating setpoints and safety cutouts and make sure they are correct for the operation.

Remove debris from work-site.

PM Checklist Page 3 of 3Printed Friday, December 1, 2023 ACLCH21AN

Description: GHP AIR COOLED CHILLER

Frequency: Monthly 2Estimated Time (hours):ACLCH21MOCode:

(T)ools, (S)afety Equipment and (M)aterials

Mechanic tool set. Refrigeration tools.1

Rags and cleaning materials.2

Refrigerant leak tester.3

Replacement lamps4

Access ladder.5

Personal protective equipment (PPE) for handling refrigerants.6

Rags.7

Safety Guidelines

Schedule work with operating personnel.1

Follow site safety rules for lockout and tagout.2

Be very careful when climbing roof access ladders.3

Review and follow the manufacturer’s instructions.4

Follow safety and environmental rules for refrigerants.5

Don't vent refrigerants. Refrigerants must be recovered.6

Submit a work order if refrigerants need to be added.7

Report any problems you find.8

Record the results in the maintenance log.WARNING: EXTREME PRESSURE OR VACUUM MAY BE

PRESENT.

Maintenance Procedures

Check the start of the endotermic engine and check exhaust for excessive black or white smoke.

Check when the Engine is on, if have noise and vibrations.

Check head pressure.

Check suction pressure.

Check discharge pressure

Check chill water - intake.

Check operating temperatures.

Switch primary/secondary compressors and pumps.

Check hot gas bypass valve.

Check thermostatic expansion valve.

Check refrigerant level.

Check oil level in oil separator sight glass.

Check for leaks all lines.

Check liquid line sight glass/moisture indicator.

Check water lines.

Check condenser coils for dirt/debris and clean if necessary.

Check operation of all controls.

Replace burned out indicator lights.

PM Checklist Page 1 of 1Printed Friday, December 1, 2023 ACLCH21MO

Description: GHP AIR COOLED CHILLER

Frequency: Semi-Annual 6Estimated Time (hours):ACLCH21SACode:

(T)ools, (S)afety Equipment and (M)aterials

Mechanic tool set. Refrigeration tools.1

Rags and cleaning materials.2

Refrigerant leak tester.3

Replacement lamps4

Access ladder.5

Personal protective equipment (PPE) for handling refrigerants.6

Rags.7

Safety Guidelines

Schedule work with operating personnel.1

Follow site safety rules for lockout and tagout.2

Be very careful when climbing roof access ladders.3

Review and follow the manufacturer’s instructions.4

Follow safety and environmental rules for refrigerants.5

Don't vent refrigerants. Refrigerants must be recovered.6

Submit a work order if refrigerants need to be added.7

Report any problems you find.8

Record the results in the maintenance log.WARNING: EXTREME PRESSURE OR VACUUM MAY BE

PRESENT.

Maintenance Procedures

Monthly Procedure

Check the start of the endotermic engine and check exhaust for excessive black or white smoke.

Check when the Engine is on if have noise and vibrations.

Check suction pressure.

Check discharge pressure

Check chill water - intake.

Check operating temperatures.

Switch primary/secondary compressors and pumps.

Check hot gas bypass valve.

Check thermostatic expansion valve.

Check refrigerant level.

Check oil level in oil separator sight glass.

Check for leaks all lines.

Check liquid line sight glass/moisture indicator.

Check water lines.

Check condenser coils for dirt/debris and clean if necessary.

Check operation of all controls.

Replace burned out indicator lights.

Semi-annual Procedure PM Checklist Page 1 of 2Printed Friday, December 1, 2023 ACLCH21SA

Description: GHP AIR COOLED CHILLER

Frequency: Semi-Annual 6Estimated Time (hours):ACLCH21SACode:

Semi-annual Procedure

Check coolant level. Add as required.

Change the engine oil after 10.000 hour of work.

Inspect condition of fan and alternator belts and radiator hoses. Inspect belts for proper tension.

NOTE: If one fan belt requires replacing, replace all fan belts as a set.

Check the elctrical connection .

Inspect air filter. Clean or replace as necessary.

Inspect exhaust manifolds, mufflers and piping for leaks.

Take a Registration an half an hour of the work of the machine with the load and compare with the manifacturer data analisys.

Check programmable operating setpoints and safety cutouts and make sure they are correct for the operation.

Check compressor and heaters for proper operation.

Check compressor superheat on evaporator and economizer TXVs. Adjust as required.

Check condenser and economizer subcooling. Adjust as required.

Leak check the chiller. Submit work order to find and repair leaks.

PM Checklist Page 2 of 2Printed Friday, December 1, 2023 ACLCH21SA

Asset Type: AIR HANDLER

Description: AIR HANDLING UNIT

Frequency: AN 8Estimated Time (hours):AH01ANCode:

(T)ools, (S)afety Equipment and (M)aterials

(T) Mechanics tool set1

(T) Tachometer2

(S) Safety glasses or goggles3

(S) Gloves4

(M) Cleaning products (use appropriate PPE)5

(M) Lubricants6

(T) Grease gun7

(T) Clamp-on ammeter8

(T) Fin comb9

(T) Self sealing, quick disconnect refrigerant hose fittings10

(T) Portable vacuum cleaner11

(T) Pressure washer12

(M) Coil cleaning solution13

(T) Electronic leak detector14

(S) Lockout/tagout kit15

(T) Refrigerant recovery machine16

(M) Replacement filter17

(M) Spare belt18

(M) Refrigerant19

(M) Corrosion removal materials, primer and paint20

(M) Algae tablets or Clorox bleach21

(T) Refrigerant vacuum pump.22

(T) Empty refrigerant gas cylinder, adequately sized.23

(M) Tube of leak lock.24

(T) Refrigeration tubing split box end wrenches.25

(T) New schrader valve access pot caps, with seals.26

(T) New schrader valve stems, with insert tool and lock off tool.27

Safety Guidelines

Individual(s) performing maintenance must be certified in EPA approved refrigerant recovery procedures, and comply with the latest provisions of the United States Clean Air Act and Environmental Protection Agency regulations as they apply to protection of stratospheric ozone and the disposal of lead based paint residue.

Schedule outage of equipment with effected personnel.2

Review manufacturer's operation and maintenance instructions.3

De-energize, lockout, and tag circuit. CAUTION - Check that circuits are dead before proceeding with any work. Re-ascertain that you have identified and located the correct electrical circuit breaker, and any other source of power, i.e.: control power.

Follow site safety procedures and your supervisor's instructions.5

PM Checklist Page 1 of 3Printed Thursday, October 26, 2023 AH01AN

Description: AIR HANDLING UNIT

Frequency: AN 8Estimated Time (hours):AH01ANCode:

Refrigerant must not be intentionally vented to the atmosphere. Recover, reclaim, and recycle refrigerant. Maintain a log stating quantity and type of refrigerant added or removed. Disposal of refrigerant and refrigerant oils must be performed in accordance with published regulations and directives.

Record and report to your supervisor any equipment damage or deficiencies found while performing this task.

All tests shall conform to the manufacturer's test procedures and standard values. Insure all equipment is properly grounded, to no more than 5 ohms resistance.

Maintenance Procedures

Inspect filter. If necessary, perform the following maintenance.

Remove old filters.

Vacuum filter section of air handler.

Inspect frame, clamp, etc. for signs of wear or damage. Repair if necessary

Install new filters or clean old filters if they are a reusable type. Insure direction of airflow corresponds with the airflow arrow on the air filter, and that they are sized properly to cover the openings.

Inspect fan blades and other moving parts for dirt accumulation, damage, or excessive wear. Clean and repair as necessary.

Check fan RPMs against design specifications.

Inspect dampers for dirt accumulation, clean as necessary. Inspect seals, repair or replace as necessary.

Inspect damper actuators for proper operation. Adjust linkage if out of alignment.

Lubricate mechanical connections on dampers (use lubricant sparingly).

If equipped, drain and clean humidifier pan or pad. Replace pad if necessary. Remove corrosion and repair as necessary.

Perform motor maintenance.

Inspect ventilation ports for dirt accumulation or foreign objects.

Clean exterior of motor surface.

Check motor alignment. Inspect bearings for excessive wear.

Lubricate bearings according to manufacturer's recommendations.

Inspect belt alignment, condition, and tension. Adjust or replace as necessary.

Remove filler and drain plugs (use zerk fittings if installed).

Free drain hole of any hard grease or other blockage.

Add grease as required. Use high quality lithium based grease unless otherwise noted .

Check motor windings for soil/foreign object accumulation. Blow out, vacuum or clean as necessary.

Inspect motor and compressor hold down bolts, and grounding straps for tightness.

Perform unit maintenance.

Thoroughly clean interior and exterior of machine and inspect for damage.

Clean drain pan and lines and note excessive corrosion. Treat rusted areas with rust inhibitor.

CAUTION: Insure that rust inhibitor does not introduce volatile organic compounds or contaminants to drain pan. Thoroughly rinse drain pan after treatment.

PM Checklist Page 2 of 3Printed Thursday, October 26, 2023 AH01AN

Description: AIR HANDLING UNIT

Frequency: AN 8Estimated Time (hours):AH01ANCode:

On direct expansion units, use a halogen leak detector or similar device to inspect all refrigerant lines, fittings, and valves for leaks. Correct any leaks.

Check refrigerant level, add as necessary.

Inspect condition of cooling and reheat coils. If required, use fin comb to straighten fins.

Clean coils. Use detergent or coil cleaning solution if heavily soiled. CAUTION: Use appropriate PPE when handling cleaning products.

Drain and clean humidifier pad or pan, if equipped. Replace pad if necessary. Remove corrosion as required.

With power OFF, tighten, inspect all electrical connections for tightness, wiring for damaged insulation, etc. 11 Inspect and adjust vibration isolators.

Run Air Handler. Observe action of controls, relays, switches, etc. Insure that :

Humistat activates humidifier.

Re-heat coils operate properly.

Discharge air temperature is set properly.

Assure that Pre heat controls and safety cutout controls are within operating guidelines.

Double check evaporator coil operation using the pressure - temperature relationship chart & suggested superheat scale.

Inspect and adjust vibration isolators.

Remove tags, perform operational tests, and return to service.

PM Checklist Page 3 of 3Printed Thursday, October 26, 2023 AH01AN

Description: AIR HANDLING UNIT

Frequency: QU 2Estimated Time (hours):AH01QUCode:

(T)ools, (S)afety Equipment and (M)aterials

(T) Mechanics tool set1

(T) Tachometer2

(S) Safety glasses or goggles3

(S) Gloves4

(M) Cleaning products (use appropriate PPE)5

(M) Lubricants6

(T) Grease gun7

(T) Clamp-on ammeter8

(T) Fin comb9

(T) Self sealing, quick disconnect refrigerant hose fittings10

(T) Portable vacuum cleaner11

(T) Pressure washer12

(M) Coil cleaning solution13

(T) Electronic leak detector14

(S) Lockout/tagout kit15

(T) Refrigerant recovery machine16

(M) Replacement filter17

(M) Spare belt18

(M) Refrigerant19

(M) Corrosion removal materials, primer and paint20

(M) Algae tablets or Clorox bleach21

(T) Refrigerant vacuum pump.22

(T) Empty refrigerant gas cylinder, adequately sized.23

(M) Tube of leak lock.24

(T) Refrigeration tubing split box end wrenches.25

(T) New schrader valve access pot caps, with seals.26

(T) New schrader valve stems, with insert tool and lock off tool.27

Safety Guidelines

Individual(s) performing maintenance must be certified in EPA approved refrigerant recovery procedures, and comply with the latest provisions of the United States Clean Air Act and Environmental Protection Agency regulations as they apply to protection of stratospheric ozone and the disposal of lead based paint residue.

Schedule outage of equipment with effected personnel.2

Review manufacturer's operation and maintenance instructions.3

De-energize, lockout, and tag circuit. CAUTION - Check that circuits are dead before proceeding with any work. Re-ascertain that you have identified and located the correct electrical circuit breaker, and any other source of power, ie: control power.

Follow site safety procedures and your supervisor's instructions.5

PM Checklist Page 1 of 3Printed Thursday, October 26, 2023 AH01QU

Description: AIR HANDLING UNIT

Frequency: QU 2Estimated Time (hours):AH01QUCode:

Refrigerant must not be intentionally vented to the atmosphere. Recover, reclaim, and recycle refrigerant. Maintain a log stating quantity and type of refrigerant added or removed. Disposal of refrigerant and refrigerant oils must be performed in accordance with published regulations and directives.

Record and report to your supervisor any equipment damage or deficiencies found while performing this task.

All tests shall conform to the manufacturer's test procedures and standard values. Insure all equipment is properly grounded, to no more than 5 ohms resistance.

Maintenance Procedures

Inspect filter. If necessary, perform the following maintenance.

Remove old filters.

Vacuum filter section of air handler.

Inspect frame, clamp, etc. for signs of wear or damage. Repair if necessary

Install new filters or clean old filters if they are a reusable type. Insure direction of airflow corresponds with the airflow arrow on the air filter, and that they are sized properly to cover the openings.

Inspect fan blades and other moving parts for dirt accumulation, damage, or excessive wear. Clean and repair as necessary.

Check fan RPMs against design specifications.

Inspect dampers for dirt accumulation, clean as necessary. Inspect seals, repair or replace as necessary.

Inspect damper actuators for proper operation. Adjust linkage if out of alignment.

Lubricate mechanical connections on dampers (use lubricant sparingly).

If equipped, drain and clean humidifier pan or pad. Replace pad if necessary. Remove corrosion and repair as necessary.

Perform motor maintenance.

Inspect ventilation ports for dirt accumulation or foreign objects.

Clean exterior of motor surface.

Check motor alignment. Inspect bearings for excessive wear.

Lubricate bearings according to manufacturer's recommendations.

Inspect belt alignment, condition, and tension. Adjust or replace as necessary.

Remove filler and drain plugs (use zerk fittings if installed).

Free drain hole of any hard grease or other blockage.

Add grease as required. Use high quality lithium based grease unless otherwise noted .

Check motor windings for soil/foreign object accumulation. Blow out, vacuum or clean as necessary.

Inspect motor and compressor hold down bolts, and grounding straps for tightness.

Perform unit maintenance.

Thoroughly clean interior and exterior of machine and inspect for damage.

Clean drain pan and lines and note excessive corrosion. Treat rusted areas with rust inhibitor.

CAUTION: Insure that rust inhibitor does not introduce volatile organic compounds or contaminants to drain pan. Thoroughly rinse drain pan after treatment.

PM Checklist Page 2 of 3Printed Thursday, October 26, 2023 AH01QU

Description: AIR HANDLING UNIT

Frequency: QU 2Estimated Time (hours):AH01QUCode:

On direct expansion units, use a halogen leak detector or similar device to inspect all refrigerant lines, fittings, and valves for leaks. Correct any leaks.

Check refrigerant level, add as necessary.

Inspect condition of cooling and reheat coils. If required, use fin comb to straighten fins.

Clean coils. Use detergent or coil cleaning solution if heavily soiled. CAUTION: Use appropriate PPE when handling cleaning products.

Drain and clean humidifier pad or pan, if equipped. Replace pad if necessary. Remove corrosion as required.

With power OFF, tighten, inspect all electrical connections for tightness, wiring for damaged insulation, etc. 11 Inspect and adjust vibration isolators.

Run Air Handler. Observe action of controls, relays, switches, etc. Insure that:

Humistat activates humidifier.

Re-heat coils operate properly.

Discharge air temperature is set properly.

Assure that Pre heat controls and safety cutout controls are within operating guidelines.

Double check evaporator coil operation using the pressure - temperature relationship chart & suggested superheat scale.

Inspect and adjust vibration isolators.

Remove tags, perform operational tests, and return to service.

PM Checklist Page 3 of 3Printed Thursday, October 26, 2023 AH01QU

Asset Type:

Description: Heat recovery unit annual preventive maintenance.

Frequency: 2Estimated Time (hours):AH05ANCode:

(T)ools, (S)afety Equipment and (M)aterials

(T) Mechanics tool set.1

(T) Grease gun and oiler.2

(M) Biocide.3

(T) Pressure washer.4

(T) Vacuum.5

(T) Fin comb.6

(T) Cleaning tools and materials.7

(T) PPE8

(T) Ladder (if necessary).9

(T) Electrician's tool set.10

(T) Cleaning equipment and materials.11

(M) Lubricants.12

(M) Lamps.13

(T) Filter replacement.14

Safety Guidelines

1. Schedule shutdown with operating personnel, as needed.1

2. Review manufacturer's instructions.2

3. De-energize, lock out and tag electrical circuit(s).3

4. Comply with the latest provisions of the Clean Air Act and Environmental Protections Agency (EPA) regulations.

5. Don't vent refrigerants. Refrigerants must be recovered.5

6. Refrigerants and oils to be removed for disposal must be analyzed for hazardous waste and handling accordingly.

7. Follow all safety procedures for handling refrigerants and all labels on refrigerant containers.7

Maintenance Procedures

Quarterly procedures:

Check differential pressure and clean or change filters if limit will be excessed before next quarterly check.

When changing filters, clean filter compartment, coils, housing, room, area as required.

Check/clean/adjust grills, dampers, vanes, linkages are required.

Check temperatures and pressures.

Check for unusual noise/vibration.

Lubricate Blower Bearings.

Inspect for leaks.

Clean condensate drain pan. Ensure condensate drains are clear. Service condensate pumps.

Check summer/winter switch in proper position.

Remove tags and restore to service.

Clean up work area and remove trash.

Annual procedures:

PM Checklist Page 1 of 2Printed Thursday, October 26, 2023 AH05AN

Description: Heat recovery unit annual preventive maintenance.

Frequency: 2Estimated Time (hours):AH05ANCode:

FAN

Tag out unit.

Check fan blades for dust buildup and clean if necessary.

Check fan blades and moving parts for cracks and excessive wear.

Check mounting bolts, set screws, etc for security.

Check dampers for dirt accumulations, clean as necessary. Check belt, repair or replace as necessary.

Check damper actuators and linkage for proper operation. Adjust linkage on dampers if out of alignment.

Lubricate mechanical connections of dampers sparingly.

Clean coils by brushing, blowing, vacuuming or pressure washing.

Check coils for leaking and adjust tightness of fittings when required.

Check for refrigerant leaks on all lines, valves, fittings, coils, etc. If leaks cannot be stopped or corrected, report leak status to supervisor.

Use fin comb to straighten coil fins.

Clean heat exchanger.

Flush and clean condensate pans and drains, remove all rust, prepare metal and paint where required. Treat condensate pans with an EPA approved biocide.

Check belts for wear and cracks, adjust tension or alignment and replace belts when necessary.

Check couplings for alignment, tightness and wear.

Vacuum interior of unit.

Lubricate fan shaft bearings while unit is running. Do not over lubricate. Remove old or excess lubricant.

Check and repair damaged insulation.

Check soundness of unit's structures and clean.

Remove tags, perform operational test and return unit to service.

MOTOR

Tag out unit.

Clean exterior of motor surfaces of soil accumulation.

Clean motor ventilation ports.

Lubricate motor bearings.

Check hold down bolts and grounding straps for tightness.

Clean motor starter and check connections for tightness.

Check motor starter and controls for proper operation.

Re-lamp as necessary.

Remove tags, perform operational test and return unit to service.

PM Checklist Page 2 of 2Printed Thursday, October 26, 2023 AH05AN

Description: Heat recovery unit quarterly preventive maintenance.

Frequency: 1Estimated Time (hours):AH05QUCode:

(T)ools, (S)afety Equipment and (M)aterials

(T) Mechanics tool set.1

(M) Filter replacement.2

(T) Lubricant and grease gun.3

(T) Vacuum and cleaning materials.4

(T) Ladder (if necessary).5

(S) PPE6

Safety Guidelines

1. Schedule shutdown with operating personnel, as needed.1

2. Review manufacturer's instructions.2

3. De-energize, lock out and tag electrical circuit(s).3

4. Comply with the latest provisions of the Clean Air Act and Environmental Protections Agency (EPA) regulations.

5. Don't vent refrigerants. Refrigerants must be recovered.5

6. Refrigerants and oils to be removed for disposal must be analyzed for hazardous waste and handling accordingly.

7. Follow any safety procedures for handling refrigerants and all labels on refrigerant containers.7

Maintenance Procedures

Quarterly procedures:

Check differential pressure and clean or change filters if limit will be exceeded before next quarterly check.

When changing filters, clean filters compartment, coils, housing, room, area as required.

Check/clean/adjust grills, dampers, vanes, linkages are required.

Check temperatures and pressures.

Check for unusual noise/vibration.

Lubricate Blower Bearings.

Inspect for leaks.

Clean condensate drain pan. Ensure condensate drains are clear. Service condensate pumps.

Check summer/winter switch in proper position.

Remove tags and restore to service.

Clean up work area and rempve trash.

PM Checklist Page 1 of 1Printed Thursday, October 26, 2023 AH05QU

Description: AIR HANDLING UNIT (BELT DRIVE)

Frequency: Annual 4Estimated Time (hours):AH16ANCode:

(T)ools, (S)afety Equipment and (M)aterials

Mechanic’s tool set.1

Grease gun.2

Fan bearing grease.3

Polyrex-EM grease for motors.4

Biocide.5

Vacuum.6

Fin comb.7

Cleaning tools and materials.8

Hose and bucket for cleaning strainers.9

Infrared tester.10

Vibration analysis tester.11

Megger.12

Clamp-on amp meter.13

Refrigerant leak test equipment14

Belts15

Replacement filters.16

Safety Guidelines

Schedule work with operating personnel.1

Follow site safety rules for lockout and tagout.2

Review and follow the manufacturer’s instructions.3

Record equipment damage or deficiencies.4

Follow safety and environmental procedures for handling refrigerants (DX units only).5

Record results in the equipment history log.6

Maintenance Procedures

Quarterly procedures:

Check, clean and adjust grills, dampers, vanes, linkages as required.

Clean and wash filters with right products. Replace if needed.

Check for unusual noise, vibration or leakage.

Restore to service.

Clean up work area and remove trash.

Annual procedures:

Pre-work operational tests with unit operating:

Check for unusual noise or vibration.

Perform vibration analysis. Record corrective measures if needed.

Perform thermal analysis. Record corrective measures if needed.

Stop the unit and clean/adjust:

Clean exterior of unit.

PM Checklist Page 1 of 3Printed Friday, October 27, 2023 AH16AN

Description: AIR HANDLING UNIT (BELT DRIVE)

Frequency: Annual 4Estimated Time (hours):AH16ANCode:

Inspect panels for damage.

Inspect air hoods and air louvers for damage and debris.

Inspect bird screens for damage and debris.

Inspect mist eliminators for damage, dirt and debris.

Check and clean grills, dampers, vanes, linkages as required.

Check damper actuators and linkage for proper operation. Adjust linkage on dampers if out of alignment.

Lubricate mechanical connections of dampers sparingly.

Vacuum interior of unit if necessary.

Check doors, handles, latches and hinges for proper operation.

Inspect door gaskets for damage and proper seal.

Check soundness of unit structure. (Is it falling apart?)

Service the fan:

Check belts for wear and cracks, adjust tension or alignment, and replace belts when necessary.

Check fan housing, wheel, shaft, frame, inlet vanes and bearings for damage, wear, loose parts, dirt and debris.

Check fan base, vibration isolators and thrust restraints for damage, wear, loose parts, dirt and debris.

Check sheaves for excessive wear. Submit a work order to replace the sheaves when the belts start riding low.

Check fan blades for dust buildup and clean if necessary.

Check fan blades and moving parts for cracks and excessive wear.

Check mounting bolts, set screws, etc. for security.

Check condition of extended lubrication lines when present.

Lubricate fan shaft bearings while unit is running. Do not over lubricate. Remove old or excess lubricant. (See manufacturer literature)

Clean and service the coils and cooling/heating components:

Inspect coils and clean by brushing, blowing, vacuuming, or pressure washing if necessary.

Check coils for leaks and adjust tightness of fittings when required.

Use fin comb to straighten coil fins. (If necessary)

For hydronic units, cycle all hydronic water valves two times and check for leaks.

For DX units, check for refrigerant leaks on all lines, valves, fittings, coils, etc. Submit a work order to repair any leaks found.

Check and repair damaged insulation.

Check filters and change if necessary.

Clean and service the condensate catch and removal components:

Flush and clean condensate pans and drains, remove all rust, prepare metal and paint where required.

Ensure condensate drain lines are clear and free running.

PM Checklist Page 2 of 3Printed Friday, October 27, 2023 AH16AN

Description: AIR HANDLING UNIT (BELT DRIVE)

Frequency: Annual 4Estimated Time (hours):AH16ANCode:

Service condensate pumps, if equipped.

Clean the strainers.

Service the motor:

Clean exterior of motor surfaces of soil accumulation.

Clean motor ventilation ports.

Check motor for damage.

Lubricate motor bearings with Polyrex-EM grease. Don't use fan bearing grease in the motor.

Check adjustable fan motor base and mounting hardware for damage or loose parts. Tighten as necessary.

Check grounding straps for tightness.

Check and record insulation resistance with a megger. Don't megger variable frequency drives.

Perform corrective measures identified during the pre-work operation test if possible as preventive maintenance. Otherwise, submit a work order for correction.

Remove tags, perform operational test, and return unit to service.

Check for proper condensate drainage.

Check for unusual noise or vibration.

Perform vibration and thermal analysis to verify correction of any pre-test problems.

Check unit sensors for proper readout at the building automation system.

Record motor running amps at 100 percent frequency and air loading.

PM Checklist Page 3 of 3Printed Friday, October 27, 2023 AH16AN

Description: AIR HANDLING UNIT (Belt Drive)

Frequency: Quarterly 0.5Estimated Time (hours):AH17QUCode:

(T)ools, (S)afety Equipment and (M)aterials

Mechanics tool set.1

Vacuum and cleaning materials.2

Replacement filters.3

Safety Guidelines

Schedule work with operating personnel.1

Follow site safety rules for lockout and tagout.2

Review and follow manufacturer OM instructions.3

Record equipment damage or deficiencies.4

Follow safety and environmental procedures for handling refrigerants (DX units only).5

Record results in the equipment history log.6

Maintenance Procedures

Check, clean, and adjust grills, dampers, vanes, linkages as required.

Clean and wash filters with right products. Replace if needed

Check for unusual noise, vibration or leakage.

Restore to service.

Clean up work area and remove trash.

Check Belts for wear and cracks, adjust tension and alignment, and replace the belt if necessary

PM Checklist Page 1 of 1Printed Friday, October 27, 2023 AH17QU

Asset Type: A/C, Split-System Unit

Description: AC SPLIT SYSTEM, CONDENSER & EVAPORATOR

Frequency: Annual 2Estimated Time (hours):AS02ANCode:

(T)ools, (S)afety Equipment and (M)aterials

(T) Megger.1

(M) Biocide strips.2

(M) Filter replacement.3

(T) Vacuum.4

(T) Fin comb.5

(T) Coil cleaner.6

(T) Oiler.7

(T) Clamp-on amp meter.8

Mechanic's tool set, refrigeration system tools.9

Refrigerant manifold gage set.10

Refrigerant leak tester.11

Cleaning tools and materials, pressure washer, vacuum, fin comb,12

Rust removal materials, primer, paint.13

Lubricants, belts.14

Personal protection equipment for handling refrigerants.15

Ladder.16

Safety Guidelines

Schedule work with operating personnel.1

Follow site safety rules for lockout and tagout.2

Be very careful when climbing roof access ladders.3

Review and follow the manufacturer’s instructions.4

Follow safety and environmental rules for refrigerants.5

Don't vent refrigerants. Refrigerants must be recovered.6

Submit a work order if refrigerants need to be added.7

Report any problems you find.8

Record the results in the maintenance log.9

Maintenance Procedures

Lock and tag out unit.

Check with operating or area staff for problems.

Clean dust and dirt from entire unit and all ventilation ports.

Wash coils with water hose. Only use a coil cleaning solution if nothing else will work.

Inspect system for any signs of rust. Remove rust, prime with rust inhibitor, paint to match original condition. Rust must be completely removed down to base metal.

Clean blowers, fans, motors, drip pans and drain piping.

Check and adjust vibration eliminators.

Check hold down bolts and grounding straps for tightness.

Grease shaft and motor bearings, if needed.

Adjust the belt tension and alignment, if needed.

PM Checklist Page 1 of 3Printed Thursday, October 26, 2023 AS02AN

Description: AC SPLIT SYSTEM, CONDENSER & EVAPORATOR

Frequency: Annual 2Estimated Time (hours):AS02ANCode:

Check electrical wiring and connections; tighten loose connections.

Clean area around equipment.

Check system for refrigeration leaks. If leaks are detected, submit a work order to correct the problems and recharge the system.

Remove locks and tags

Perform operational check and return to service.

Record suction and discharge pressures, sub-cooling and superheat.

EVAPORATOR PROCEDURE

GENERAL:

Cover all exposed surfaces below the evaporator.

Carefully remove access panels, covers, or ceiling tiles to gain access to the equipment.

CASING

CASING:

Clean the exterior and interior of the unit casing.

Remove rust and corrosion. Apply corrosion protection.

Carefully inspect all fasteners to ensure integrity and replace any which have rusted. Allreplacement components, parts, and materials should be of rust resistant manufacture.

Check belts and alignment, if applicable.

Inspect air side and condensate removal components:

Inspect and clean coils by vacuuming or brushing. Use coil cleaner if excessively dirty.

Use fin comb to straighten coil fins where necessary.

Inspect and clean washable filters if dirty. Recharge wire mesh filters with oil when applicable.

Inspect and replace disposable filters if dirty.

Drain and clean condensate pan. Check condensate lines for free flow.

Replace biocide strips.

Fix damaged or missing insulation on the cooling lines using "Armaflex" and/or no-drip tape.

Clean strainers.

Check controls, trap, freeze-stat, and control-stat for proper operation.

Service condensate pumps if equipped.

Clean and test motors and fans:

Check ventilation ports for soil accumulation, clean if necessary.

Clean exterior of motor surfaces of soil accumulation.

Clean fan blades and check for damage.

Check belts and alignment, if applicable.

Lubricate motor bearings where required. Check manufacturer's information for requirements.

Check motor windings for accumulation of soil. Vacuum if required.

Check hold down bolts and grounding straps for tightness.

Check electrical connections for tightness.

Return to service and perform an operational test.

Test in heating and cooling modes.

PM Checklist Page 2 of 3Printed Thursday, October 26, 2023 AS02AN

Description: AC SPLIT SYSTEM, CONDENSER & EVAPORATOR

Frequency: Annual 2Estimated Time (hours):AS02ANCode:

Test in heating and cooling modes.

Check unit sensors and calibrate if required. Record calibration values.

Check unit for noise, vibration or condensate leakage.

Check for refrigeration leaks. Submit a work order to repair any leaks found.

Measure running current for all motors and check if is on line of the manufacturer datasheet.

Clean area around equipment.

PM Checklist Page 3 of 3Printed Thursday, October 26, 2023 AS02AN

Asset Type: A/C, SPLIT SYSTEM

Description: AC SPLIT SYSTEM, CONDENSER HEAT PUMP

Frequency: Quarterly 0.5Estimated Time (hours):AS02QUCode:

(T)ools, (S)afety Equipment and (M)aterials

Mechanic's tool set, refrigeration system tools.1

Cleaning tools and materials, hose and water, fin comb.2

Rust removal materials, primer, paint.3

Lubricants, belts.4

Ladder.5

Safety Guidelines

Schedule work with operating personnel.1

Follow site safety rules for lockout and tagout.2

Be very careful when climbing roof access ladders.3

Review and follow the manufacturer’s instructions.4

Submit a work order if refrigerants need to be added.5

Report any problems you find.6

Record the results in the maintenance log.7

Maintenance Procedures

Lock and tag out unit.

Check with operating or area staff for problems.

Clean dust and dirt from entire unit and all ventilation ports.

Wash coils with water hose. Only use a coil cleaning solution if nothing else will work.

Inspect system for any signs of rust. Remove rust, prime with rust inhibitor, paint to match original condition. Rust must be completely removed down to base metal.

Clean blowers, fans, motors, drip pans and drain piping.

Check hold down bolts and grounding straps for tightness.

Grease shaft and motor bearings, if needed.

Clean area around equipment.

Remove locks and tags

PM Checklist Page 1 of 1Printed Thursday, October 26, 2023 AS02QU

Asset Type: BOILER, WATER

Description: Gas fired wall mounted boilers. PM Procedures to be performed annually.

Frequency: Annual 8.00Estimated Time (hours):BO01ANCode:

(T)ools, (S)afety Equipment and (M)aterials

(T) Water Quality Test kit1

(T) Mechanic's tools2

(T) Cleaning materials3

Safety Guidelines

1. Follow site safety procedures and supervisor’s instructions.1

3. Use extreme caution when climbing access ladders.2

2. Schedule outage with operating personnel.3

4. Perform applicable lockout/tag out steps of site safety procedures.4

5. Lockout and disconnect the main power before tightening the main supply lugs in order to avoid the hazard of electrical shock, which could result in serious personal injury or death.

6. Record and report equipment damage or deficiencies.6

7. Review and follow the manufacturer’s O&M instructions.7

8. Record results in the equipment history log.8

9. Allow only qualified personnel to do maintenance work on this equipment.9

Maintenance Procedures

Annual: PM procedures to be performed every year

1. Check and note the mechanical water consumption

2. Check the automatic air purging valves or operate the manual air purging valves

3. Analyze the mechanical water and make up water for hardness

4. Boilers, piping and fume flue visual check

5. Measure the gas static and dynamic pressure

6. Check the fumes temperature

7. Check the setpoint thermostat

8. Check the manometers on the gas line

9. Clean the burner filter

10. Replace the burned lamps on the distribution panel

11. Check the distribution panel door

12. Check the expansion tanks

13. Check the thermometers and manometers for the proper operation

14. Check the condensate drain

15. Check the condensate neutralizer device (if present)

16. Check the PH of the condensate from the fume flues

17. Perform the fumes analysis on boilers

18. Inspect the boiler relief valve and the relief valve discharge pipe for signs of weeping or leakage.

19. Check the tightness of fume flues

20. Check the proper functioning of the fume flue

21. Test the natural gas leak detection system

22. Test the automated gas shut off valve tightness PM Checklist Page 1 of 2Printed Thursday, October 26, 2023 BO01AN

Description: Gas fired wall mounted boilers. PM Procedures to be performed annually.

Frequency: Annual 8.00Estimated Time (hours):BO01ANCode:

22. Test the automated gas shut off valve tightness

23. Test the manual reset of the automated gas shut off valve

24. Test the minimum pressure switch

25. Open the burner and check the integrity of all the parts

23. Tighten the electrical connections

24. Check and clean the natural gas noozles in the burner

25. Clean the burner head

26. Clean the burner and the combustion chamber

27. Clean the ignitors

28. Check the burner's fan

29. Clean the fan sheaves

30. Clean the natural gas filters before the burner

31. Check the main valve on the natural gas line for proper operation

32. Test the minimum pressure switch

33. Check the maximum pressure switch

34. Check the maximum temperature switch

35. Clean the pumps' filters

PM Checklist Page 2 of 2Printed Thursday, October 26, 2023 BO01AN

Asset Type: Boiler, Water

Description: Gas fired wall mounted boilers. PM Procedures to be performed every month of the year.

Frequency: Monthly 2Estimated Time (hours):BO01MOCode:

(T)ools, (S)afety Equipment and (M)aterials

(T) Mechanic's tools1

(T) Cleaning materials2

Safety Guidelines

1. Follow site safety procedures and supervisor’s instructions.1

3. Use extreme caution when climbing access ladders.2

2. Schedule outage with operating personnel.3

4. Perform applicable lockout/tag out steps of site safety procedures.4

5. Lockout and disconnect the main power before tightening the main supply lugs in order to avoid the hazard of electrical shock, which could result in serious personal injury or death.

6. Record and report equipment damage or deficiencies.6

7. Review and follow the manufacturer’s O&M instructions.7

8. Record results in the equipment history log.8

9. Allow only qualified personnel to do maintenance work on this equipment.9

Maintenance Procedures

Monthly: PM procedures to be performed every month of the year

1. Check and note the mechanical water consumption

2. Check the automatic air purging valves or operate the manual air purging valves

3. Analyze the mechanical water and make up water for hardness

4. Boilers, piping and fume flue visual check

5. Clean the flame inspection window

5. Measure the gas and air pressure at the burner head

6. Check the fumes temperature

7. Check the setpoint thermostat

7. Burner external visual check

8. Check the manometers on the gas line

9. Clean the burner filter

9. Drain and clean the dirt separators

9. Replace the burned lams on the distribution panel

10. Check the expansion tanks

11. Check the thermometers and manometers for the proper operation

12. Check the condensate drain

13. Check the condensate neutralizer device (if present)

14. Check the PH of the condensate from the fume flues

15. Inspect the boiler relief valve and the relief valve discharge pipe for signs of weeping or leakage.

PM Checklist Page 1 of 1Printed Thursday, October 26, 2023 BO01MO

Description: Gas fired wall mounted boilers. PM Procedures to be performed six month of the year.

Frequency: Semi-Annual 4Estimated Time (hours):BO01SACode:

(T)ools, (S)afety Equipment and (M)aterials

(T) Water Quality Test kit1

(T) Mechanic's tools2

(T) Cleaning materials3

Safety Guidelines

1. Follow site safety procedures and supervisor’s instructions.1

3. Use extreme caution when climbing access ladders.2

2. Schedule outage with operating personnel.3

4. Perform applicable lockout/tag out steps of site safety procedures.4

5. Lockout and disconnect the main power before tightening the main supply lugs in order to avoid the hazard of electrical shock, which could result in serious personal injury or death.

6. Record and report equipment damage or deficiencies.6

7. Review and follow the manufacturer’s O&M instructions.7

8. Record results in the equipment history log.8

9. Allow only qualified personnel to do maintenance work on this equipment.9

Maintenance Procedures

Semiannual: PM procedures to be performed every six months

1. Check and note the mechanical water consumption

2. Check the automatic air purging valves or operate the manual air purging valves

3. Analyze the mechanical water and make up water for hardness

4. Boilers, piping and fume flue visual check

5. Measure the gas static and dynamic pressure

6. Check the fumes temperature

7. Check the setpoint thermostat

8. Check the manometers on the gas line

9. Clean the burner filter

10. Replace the burned lamps on the distribution panel

11. Check the distribution panel door

12. Check the expansion tanks

13. Check the thermometers and manometers for the proper operation

14. Check the condensate drain

15. Check the condensate neutralizer device (if present)

16. Check the PH of the condensate from the fume flues

17. Inspect the boiler relief valve and the relief valve discharge pipe for signs of weeping or leakage.

18. Check the tightness of fume flues

19. Test the natural gas leak detection system

20. Test the manual reset of the automated gas shut off valve

21. Test the minimum pressure switch

22. Open the burner and check the integrity of all the parts PM Checklist Page 1 of 2Printed Thursday, October 26, 2023 BO01SA

Description: Gas fired wall mounted boilers. PM Procedures to be performed six month of the year.

Frequency: Semi-Annual 4Estimated Time (hours):BO01SACode:

22. Open the burner and check the integrity of all the parts

23. Tighten the electrical connections

24. Check and clean the natural gas noozles in the burner

25. Clean the natural gas filters before the burner

PM Checklist Page 2 of 2Printed Thursday, October 26, 2023 BO01SA

Description: Gas fired boilers. PM Procedures to be performed every year.

Frequency: Semi-Annual 8.00Estimated Time (hours):BO02ANCode:

(T)ools, (S)afety Equipment and (M)aterials

(T) Mechanic's tools1

(T) Cleaning materials2

Safety Guidelines

1. Follow site safety procedures and supervisor’s instructions.1

3. Use extreme caution when climbing access ladders.2

2. Schedule outage with operating personnel.3

4. Perform applicable lockout/tag out steps of site safety procedures.4

5. Lockout and disconnect the main power before tightening the main supply lugs in order to avoid the hazard of electrical shock, which could result in serious personal injury or death.

6. Record and report equipment damage or deficiencies.6

7. Review and follow the manufacturer’s O&M instructions.7

8. Record results in the equipment history log.8

9. Allow only qualified personnel to do maintenance work on this equipment.9

Maintenance Procedures

Monthly: PM…