Exhibit_B_-PM_and_Tasking_Frequency.pdf

Exhibit B – Preventative Maintenance and Task Frequency Checklist

Boilers- Checklist

Task Description Q/Y Q1 Q2 Q3 Q4 ☐ Inspect boiler pressure vessel for possible leaks. Q x x x x ☐ Check combustion chamber, burner and flue for flame quality, deterioration, moisture problems, condensation, and combustion products.

Y x

☐ Inspect blow-down or drain valve. Clear all debris to ensure proper operation.

Q x x x x

☐ Check control system set points, configuration, safeties, sensors and devices for optimum operation.

Q x x x x

☐ Check electrical section for dirt, debris and/or loose terminations. Q x x x x ☐ Check for fouling, corrosion, leaks or degradation. Q x x x x ☐ Check system performance under current load conditions - Document and report if not performing as per design.

Q x x x x

☐ Check expansion tank sight glass and verify pressure on bladder type tanks.

Q x x x x

☐ Check primary and/or secondary pumps for correct operation Q x x x x ☐ Check Makeup water pressure Q x x x x ☐ Verify all temperature and pressure gauges are functional and accurate. Q x x x x ☐ Lubricate all motor / bearings once per year Y x ☐ Open and clean exchangers. Must be completed by October 31. Y X ☐ Perform combustion tests and adjustment. Provide results to SCWA. Y X

Packaged Box-Car AHUs- Checklist General Q/Y Q1 Q2 Q3 Q4 ☐ Check integrity of all panels on equipment Q x x x x ☐ Check equipment controls for error codes/alarms Q x x x x ☐ Inspect unit for excessive noise and/or vibration Q x x x x ☐ Check electrical section for dirt, debris and/or loose terminations Q x x x x ☐ Check for fouling, corrosion, leaks or degradation. Q x x x x Condensing Section ☐ Check system performance under current load conditions Q x x x x ☐ Inspect electrical contacts for overheating, pitting or other signs of damage

Q x x x x

☐ Inspect compressor electrical connections Q x x x x ☐ Check refrigerant oil levels for refrigerant systems Q x x x x ☐ Check low ambient head pressure control sequence for proper operation.

(if applicable)

Q x x x x

☐ Check motor amps verify within with name plate limitations. Document and report any deficiencies.

Q x x x x

☐ Check variable frequency drive for proper operation. (if applicable) Q x x x x ☐ Check condenser fan motor wiring and mounting hardware Q x x x x ☐ Inspect compressor refrigerant manifolds for wears and signs of leaks Q x x x x ☐ Check compressor crankcase heater Q x x x x ☐ Check fan blades Q x x x x ☐ Check for excessive scales or debris on condenser coil surfaces Q x x x x ☐ Check coil fins for evidence of build-up or fouling Q x x x x ☐ Perform oil analysis for compressor wear, if necessary Y x ☐ Megohm compressor windings to inspect condition of motor insulation (if required)

Y x

☐ Check differential on drier core shells (if installed as temporary measure) Y x ☐ Lubricate motors, bearings as needed (once per year) Y x ☐ Clean condenser coil surfaces for excessive scale or debris Y x ☐ Inspect atmospheric building static reference Y x Evaporator and Blower Section ☐ Replace air filter at prescribed interval Q x x x x ☐ Check air filter and housing integrity. Correct as needed. Q x x x x ☐ Check fan belt tension, drive alignment, wear, seating and operation Q x x x x ☐ Check fan/blower wheels for balance and particulate buildup Q x x x x ☐ Secure and Inspect electrical contacts for overheating, pitting or other signs of damage

Q x x x x

☐ Check evaporator coil fins Q x x x x ☐ Check condensate pump (clean once per year if applicable) Q x x x x ☐ Check drain pan, drain line and coil for biological growth Q x x x x ☐ Check P-trap for obstructions Q x x x x ☐ Inspect for evidence of moisture carryover beyond the drain pan from colling coils

Q x x x x

☐ Check all motor and damper linkages, air filter DP switch Q x x x x ☐ Flush out P-trap one time per year prior to cooling season Y x ☐ Clean condensate pump (once per year if applicable) Y x ☐ Lubricate fan and motor bearings (once per year) Y x Heat Section ☐ Check electrical section for dirt, debris and/or loose terminations Q x x x x ☐ Check combustion chamber, burner and flue for deterioration, leaks, moisture problems, condensation, and combustion products

SA x x

Economizer & Exhaust Section ☐ Inspect electrical contacts for overheating, pitting or other signs of damage

Q x x x x

☐ Inspect all dampers for excessive noise and/or vibration. Check linkage Q x x x x ☐ Inspect control operation and note any concerns Q x x x x ☐ Check for proper damper operation: economizer, mixed air, discharge, exhaust

Q x x x x

☐ Check fan belt tension, drive alignment, wear, seating and operation Q x x x x ☐ Check variable frequency drive for correct operation (if applicable) Q x x x x ☐ Check photohelic setpoint, operation and insure gauge is covered. Q x x x x

☐ Check exhaust blower for balance and particulate buildup Y x ☐ Lubricate fan and motor bearings (as necessary) Y x

Rooftop Units (RTUs)- (Package Gas/Electric Units) – Checklist

☐ Replace air filter at prescribed interval. Q x x x x ☐ Check air filter housing integrity. Q x x x x ☐ Check economizer, Mixed air, Exhaust Air damper linkages and control operation. Clean fresh air pre filter as needed

Q x x x x

☐ Check integrity of all panels on equipment. Q x x x x ☐ Check electrical section for dirt, debris and/or loose terminations or pitted contactors.

Q x x x x

☐ Check all electrical components are operational within factory specifications - Document and submit any irregular conditions.

Q x x x x

☐ Check system performance in heating and cooling under current load conditions - Document and report if not performing as per design.

Q x x x x

☐ Check fan belt tension, drive alignment, wear, seating and operation. Q x x x x ☐ Check fan blades for balance and particulate buildup. Q x x x x ☐ Check all heating circuit safeties and components Q x x x x ☐ Check for excessive scale or debris on condenser coil surfaces. Clean once per year.

Q x x x x

☐ Visually inspect areas of moisture accumulation for biological growth. Q x x x x ☐ Check coil fins for evidence of build-up or fouling. Q x x x x ☐ Inspect for evidence of moisture carryover beyond the drain pan from cooling coils.

Q x x x x

☐ Check combustion chamber, burner and flue for deterioration, leaks, moisture problems, condensation, and combustion products.

Q x x x x

☐ Check variable frequency drive for proper operation. (if applicable) Q x x x x ☐ Flush out P-trap one time per year prior to cooling season. Y x ☐ Clean excessive scale or debris on condenser coil surfaces. Y x ☐ Check for evidence of build-up or fouling on heat exchange surfaces. Y x ☐ Lubricate field serviceable bearings If applicable once per year. Y x

Split Systems/ VRF/ Mini Split - Checklist Task Description Q/Y Q1 Q2 Q3 Q4 ☐ Replace air filter at prescribed interval. Q x x x x ☐ Check air filter housing integrity. Q x x x x ☐ Check control system and devices for proper operation. Q x x x x ☐ Check fan blades. Q x x x x ☐ Check and TD across evaporator coils Q x x x x ☐ Check integrity of all panels on equipment. Q x x x x ☐ Check coil fins for fouling, corrosion or degradation. Q x x x x ☐ Check condensate pumps if applicable. (clean once per year) Q x x x x ☐ Check P-trap for obstructions. Q x x x x ☐ Inspect for evidence of moisture carryover beyond the drain pan from equipment cabinet ☐ Perform refrigerant level check on system. Q x x x x ☐ Check all electrical components are operational within factory specifications -Document and submit any irregular conditions.

Q x x x x

☐ Flush out P-trap one time per year prior to cooling season. Y x ☐ Lubricate field serviceable bearings If applicable once per year Y x

Air Handlers & Fan Coils (91-FC-1) - Checklist Task Description Q/Y Q1 Q2 Q3 Q4 ☐ Replace air filter at prescribed interval. Q x x x x ☐ Check air filter housing integrity. Q x x x x ☐ Check economizer, Mixed air, Exhaust Air damper linkages and control operation. Clean fresh air pre filter as needed

Q x x x x

☐ Check integrity of all panels on equipment. Q x x x x ☐ Check electrical section for dirt, debris and/or loose terminations or pitted contactors.

Q x x x x

☐ Check all electrical components are operational within factory specifications - Document and submit any irregular conditions.

Q x x x x

☐ Check variable frequency drive for proper operation. (If applicable) Q x x x x ☐ Check fan belt tension, drive alignment, wear, seating and operation. Q x x x x ☐ Check evaporator coil fins for fouling, corrosion or degradation. Q x x x x ☐ Visually inspect areas of moisture accumulation for biological growth. Q x x x x ☐ Check and verify Strip heat and defrost circuit (if applicable) Q x x x x ☐ Check drain pan, drain line and coil for biological growth. Q x x x x ☐ Check P-trap for obstructions. Q x x x x ☐ Inspect for evidence of moisture carryover beyond the drain pan from equipment cabinet

Q x x x x

☐ Flush out P-trap one time per year prior to cooling season. Y x ☐ Check condensate pump. Clean once per year (if applicable). Y x ☐ Lubricate field serviceable bearings If applicable once per year. Y x

Liebert Split Systems - Checklist Filters Q/Y/SA Q1 Q2 Q3 Q4 ☐ Replace 1” Pre-Filters Q x x x x ☐ Replace 2” Filter (Challenger 3000) SA x x ☐ Replace 4” Filters (Deluxe System 3) SA x x ☐ Check air flow is unrestricted SA x x ☐ Check filter switch SA x x ☐ Wipe section clean SA x x Blower Section ☐ Check blower wheel free of debris Q x x x x ☐ Check belt tension and condition Q x x x x ☐ Check sheaves for wear and play Q x x x x ☐ Check bearings free and in good condition SA x x ☐ Inspect and tighten electrical connections SA x x

Compressor Section ☐ Check for leaks Q x x x x ☐ Check oil levels SA x x ☐ Inspect and righten electrical connections SA x x Air Cooled Condenser ☐ Verify condenser coil clean. Annual cleaning Q x x x x ☐ Check fan lade condition. Q x x x x ☐ Check motor mount is tight SA x x ☐ Bearings free and in good condition SA x x ☐ Verify refrigerant lines properly supported SA x x ☐ Inspect and tighten electrical connections SA x x ☐ Clean condenser coil annually Y x Refrigeration Cycle/Section ☐ Check for moisture visually (sight glass) Q x x x x ☐ Check refrigerant level visually (sight glass) Q x x x x ☐ Check suction pressure SA x x ☐ Check refrigerant lines SA x x ☐ Check head pressure SA x x ☐ Check superheat at compressor SA x x Reheat ☐ Check reheat element operation Q x x x x ☐ Inspect elements for cleanliness SA x x ☐ Inspect and tighten electrical connections SA x x Infrared Humidifier ☐ Check drain pan for clogs Q x x x x ☐ Check humidifier lamps Q x x x x ☐ Check lans for mineral deposits Q x x x x ☐ Inspect and tighten electrical connections SA x x Air Distribution ☐ Check air flow is unrestricted in grille area Q x x x x ☐ Check floor tiles are clear for air flow Q x x x x Electric Panel ☐ Check equipment controls for error codes/alarms Q x x x x ☐ Check fuses SA x x ☐ Inspect and tighten electrical connections SA x x ☐ Check operation sequence SA x x ☐ Check contractors for pitting/operation SA x x Readings ☐ Temperature setpoint Q x x x x ☐ High & Low Temp Alarm setpoints Y x ☐ Amp readings for blower motor Y x ☐ Record motor voltage Y x

Exhaust Fans/Power Vents- Checklist

☐ Check integrity of all panels on equipment. Q x x x x

☐ Check rain guard Q x x x x ☐ Check belt guard Q x x x x ☐ Check fan belt tension, drive alignment, wear, seating and operation. Q x x x x ☐ Check fan wheel for balance and particulate buildup. Q x x x x ☐ Check for proper rotation Q x x x x ☐ Check electrical terminations for starter or contactor verify contact pad condition

Q x x x x

☐ Check electrical section for dirt, debris and water intrusion. Q x x x x ☐ Check system operation is within name plate limitations. Document and report any deficiencies

Q x x x x

☐ Check debris / grease build up on blower wheel. Document and report if cleaning or balance is required.

Supply/Roof Fans- Checklist

☐ Check integrity of all panels on equipment. Q x x x x ☐ Check insulation inside unit covers. Q x x x x ☐ Wash air intake pre-filters as necessary. Q x x x x ☐ Check variable frequency drive for proper operation. (If applicable) Q x x x x ☐ Check fan belt tension, drive alignment, wear, seating and operation. Q x x x x ☐ Check fan wheel /blades for balance and particulate buildup. Q x x x x ☐ Check for proper rotation. Q x x x x ☐ Check system performance in heating and cooling under current load conditions -Document and report if not performing as per design.

Q x x x x

☐ Check electrical section for dirt, debris and/or loose terminations or pitted contactors.

☐ Lubricate field serviceable bearings if applicable once per year Y x

Make-Up Air Units (MAUs)- Checklist

☐ Check pre filter condition and wash as needed Q x x x x ☐ Check integrity of all panels on equipment. Q x x x x ☐ Check electrical section for dirt, debris and/or loose terminations. Q x x x x ☐ Check fan belt tension, drive alignment, wear, seating and operation. Q x x x x ☐ Check fan wheel for balance and particulate buildup. Q x x x x ☐ Check for proper rotation. Q x x x x ☐ Check variable frequency drive for proper operation. (If applicable) Q x x x x ☐ Lubricate field serviceable bearings if applicable once per year Y x

Evaporative Coolers- Checklist

☐ Check integrity of all panels on equipment. Q x x x x ☐ Check fan belt tension, drive alignment, wear, seating and operation. Q x x x x

☐ Check Cooling Pads (media) for general condition. Q x x x x ☐ Check water supply float control adjustment. Q x x x x ☐ Visually inspect pumps and associated electrical components. Q x x x x ☐ Check water distribution nozzles are free of debris. (Annual Pre-Season) Y x ☐ Clean pump screen of debris. (Annual Pre-Season) Y x ☐ Lubricate field serviceable bearings if applicable once per year Y x ☐ Remove stand pipe and drain sump. (Post-Season) Y x ☐ Shut off water supply line and bleed off residual water in supply line. (Post- Season)

Y x

Pumps- Checklist

☐ Check control system and devices for proper operation Q x x x x ☐ Check variable frequency drive for proper operation (if applicable) Q x x x x ☐ Visually inspect pumps and associated electrical components Q x x x x ☐ Visually inspect seals, gaskets and couplings for leaks Q x x x x ☐ Check for proper fluid flow. Q x x x x ☐ Check electrical section for dirt, debris and/or loose terminations Q x x x x ☐ Check magstarter for pitting or other signs of damage (if applicable) Q x x x x ☐ Check drive alignment, wear, bearing and coupling seating and operation Q x x x x ☐ Check strainer flow to determine if basket needs to be cleaned- Document and report findings

Q x x x x

☐ Lubricate all motor/bearings once per year Y x

Direct Digital Controls- Checklist Task Description (billed quarterly) We ekl y

Q1 Q2 Q3 Q4

☐ Check alarms and operating conditions in the controls each Monday.

Report findings to SCWA in writing and prepare estimates to correct any deficiencies.

W x x x x

Clean Strainers- Checklist Task Description Q Q1 Q2 Q3 Q4 ☐ Clean treated water strainers in buildings 51, 91 and 92. Report findings each quarter to SCWA.

Loop Treatment and Test- Checklist Task Description Q Q1 Q2 Q3 Q4 ☐ Measure and adjust building 51, 91 and 92 hot and cold water loops’ corrosion inhibiter levels. Report findings each quarter to SCWA.