Assessment of Elevator and Escalator Maintenance & Repair Program Final Elevator Audit Submission Bethesda Station - Escalator A09X04 (Station)

Transcription

1 Bethesda Station - Escalator A09X04 (Station) Ride Quality Test Results The Parametricoder is a time and displacement encoding system that measures mechanical performance characteristics on escalators. It is able to secure additional performance data to allow individuals to assess conformance to design and operational parameters. It uses precision linear and rotational encoding systems, coupled with a robust data collection system, to permit simple field measurement of specific parameters of escalators and moving walks. The system has allowed us to clearly indentify key issues on client escalator systems including: Incorrectly adjusted and/or damaged brake systems Worn and damaged machine components including roller chain and gear sets Failed electrical control elements used in processes Summary: Escalator brakes have questionable stopping performance under no load. Brake torque may not hold a fully loaded unit the other issues if noted are identified in each performance category. 69

2 Bethesda Station - Escalator A09X04 (Station) 70

3 Bethesda Station - Escalator A09X04 (Station) 71

4 Dupont Circle

5 Dupont Circle Station - Elevator A03N01 (Street Access) Traction Dupont Circle Station Elevator A03N01 (Street Access) Traction Elevator Audit Equipment Description Machine Room The machine room for this unit is accessed through trap doors located behind the head house at ground level on the North side of the station. The machine room is below ground and neat and clean in appearance. The lighting in the machine is insufficient to support a safe working environment. The maintenance condition of the machine room is good. Controller The controller cabinet and all components within are securely mounted and in good condition. The controller wiring is neat and securely fastened at all terminal connections with the spares tied off and tagged for accurate identification. Overall condition of the controller is good. Hoist Machine and Brake The hoist machine is a Hollister/Whitney basement traction application. The machine housing and machine beams are in good condition. The machine ring gear shows no unusual wear and is well lubricated. The motor is properly aligned and exhibits no unusual vibration or noise. The thrust bearing exhibits no unusual vibration or excessive heat at the bearing cap. There is a heavy build up of rope rouge on the hoistway side of the machine. The overall condition of the hoist machine is good. Hoist Ropes and Deflector Sheaves The hoist ropes are well worn and exhibit a severe amount of rouging from weather exposure within the hoistway. The wear to the hoist ropes is significant enough to require replacement. A heavy film of rouge has coated the car and overhead deflector sheave grooves creating the potential for the ropes to slip traction. The sheaves need to be cleaned, lubricated, and the grooves inspected prior to the installation of the new hoist ropes. Car Top, Cab Door Equipment, and Operator The car top is free of any trash or debris, but has a heavy layer of rope rouge covering the entire car top, encoder, and all cab door equipment. The car top operating box is mounted securely on the crosshead. The elevator is a corner post application having a front and side entrance with two GAL door operators mounted on the car top. The door operator chains, link arms, tracks, trucks, and rollers are dry with a heavy film of rope rouge covering all working components. All components are in need of cleaning and lubricating. The clutches are adjusted and operating correctly. The overall condition and operation of the cab doors and associated equipment is poor. Hoistway Door Equipment The hoistway door tracks, trucks, and rollers are dry with a heavy film of rope rouge covering all working components. All components are in need of cleaning and lubricating. The overall condition and operation of the hoistway doors and associated equipment is poor. Pit The elevator pit is in poor condition with a significant accumulation of debris, dirt, and water. The pit channel and spring buffers have had major exposure to water, are severely rusted and in need of replacement. The bottom sections of the car and counterweight rails exhibit major rust and require further examination to determine the appropriate course of action. 72

6 Dupont Circle Station - Elevator A03N01 (Street Access) Traction Signal Fixtures The signal fixtures are of a vandal proof design and construction. The surface finish of the fixtures is stainless. The surfaces of both car operating panels have minor scratches from abuse and vandalism consistent with mass transit applications. None of the damage is extensive enough to require replacement of the panels. The position indicator is digital and fully operational. All push buttons are intact and working correctly. The emergency communication device when activated contacted the station manager in the kiosk. Two-way communication was confirmed. Cab The structural integrity of the cab remains intact. The wall panels are stainless cladding and have several locations where the cladding is separating from the panels. The dome and ceiling are sufficient for continued use. The interior has minor damage, scratches, and dents from use, abuse, and vandalism normally associated with mass transit applications. General Observations Summary A03N01 1. The cleanliness of the unit was poor. 2. The adjustment and operation of the cab and hoistway doors and door equipment was poor. 3. The lubrication condition of the unit was poor. 73

7 Dupont Circle Station - Elevator A03N01 (Street Access) Traction Unit Photos Water problem means of removal needs to be provided Hoist rope rouge issues 74

8 Dupont Circle Station - Elevator A03N01 (Street Access) Traction Hoist rope rouge issue causing housekeeping problems Hoist rope issue causing rouge buildup on machine 75

9 Dupont Circle Station - Elevator A03N01 (Street Access) Traction Assessment Checklist 76

10 Dupont Circle Station - Elevator A03N01 (Street Access) Traction 77

11 Dupont Circle Station - Elevator A03N01 (Street Access) Traction Ride Quality Test Results Our measuring tool measures the speed and forces of hydraulic and traction elevators felt during elevator movement. It provides real-time performance information. Unit A03N01 is running 7 percent 10fpm) under contract speed. 78

12 DuPont Circle Station - Elevator A03N02 (Platform) Hydraulic DuPont Circle Station Elevator A03N02 (Platform) Hydraulic Elevator Audit Equipment Description Machine Room The machine room for this unit is located overhead. The floor, controller, and pump unit have a thin layer of dust / dirt and have not been cleaned recently. The lighting is sufficient to meet Code requirements, however it is recommended to provide a protective sleeve over the fluorescent tubes, as well as replace the broken tubes. It is necessary to climb over parts and boxes in order to access the pump unit and tank. The general cleanliness of the machine room is poor. Controller The controller is mounted adjacent to the pump tank unit with the cover securely fastened. The controller wiring is neat and securely fastened at all terminal connections with the spares tied off and tagged for accurate identification. There were some spare parts located in the bottom that should be secured. Overall condition of the controller is good. Pump, Tank, and Valve Unit The unit is a dry pump type with the equipment mounted under the tank. The valve shows minor leakage at the couplings with a small accumulation of oil in the collection pan. All components have a minor build up of surface oil and dust. Car Top, Cab Door Equipment, and Operator The car top has a walk on platform mounted over the crosshead and door operating equipment. The platform is free of debris and neat in appearance with the car top operating box laying on the platform. The car top has a minor accumulation of dirt and debris that is very difficult to access to clean. The elevator is front opening with GAL door operator mounted on the car top. The door operator chains, link arms, tracks, trucks, and rollers are lubricated. The clutch is adjusted and operating correctly. The overall condition and operation of the cab door and associated equipment is good. Hoistway Door Equipment The hoistway door tracks, trucks, and rollers are dry; exhibiting minor rust and are in need of lubrication. The overall condition and operation of the hoistway doors and associated equipment is fair. Pit The elevator pit is relatively clean and free of debris and dirt. There are some small oil/water puddles in the pit which should be cleaned up. The jack packing is in good condition with only minor leakage normally associated with hydraulic applications. Overall condition of the pit is good. Signal Fixtures The signal fixtures are of a vandal proof design and construction. The surface finish of the fixtures is bronze. The surface of the car operating panel has minor scratches from abuse and vandalism consistent with mass transit applications. None of the damage is extensive enough to require replacement of the panels. The position indicator is digital and fully operational. All push buttons are intact and working correctly. The emergency communication device when activated contacted the station manager in the kiosk. Two-way communication was confirmed. 79

13 DuPont Circle Station - Elevator A03N02 (Platform) Hydraulic Cab The structural integrity of the cab remains intact. The wall panels, glass panels, dome and ceiling are sufficient for continued use. The interior has minor damage, scratches and dents from use, abuse, and vandalism normally associated with mass transit applications. General Observations Summary A03N02 1. The cleanliness of the unit was fair. 2. The adjustment and operation of the cab and hoistway doors and door equipment was good. 3. The lubrication condition of the unit was good. 80

14 DuPont Circle Station - Elevator A03N02 (Platform) Hydraulic Unit Photos Machine room being used for storage 81

15 DuPont Circle Station - Elevator A03N02 (Platform) Hydraulic Drip pan needs to be emptied / cleaned out Light should have cover to reduce possibility of breakage 82

16 DuPont Circle Station - Elevator A03N02 (Platform) Hydraulic Assessment Checklist 83

17 DuPont Circle Station - Elevator A03N02 (Platform) Hydraulic 84

18 DuPont Circle Station - Elevator A03N02 (Platform) Hydraulic Ride Quality Test Results Our measuring tool measures the speed and forces of hydraulic and traction elevators felt during elevator movement. It provides real-time performance information. Unit A03N02 is running 6 fpm above contract speed in the up direction with the leveling speed below the 5fpm causing possible misleveling reports. (Tripping hazard) Down direction running 6fpm slow. 85

19 Dupont Circle Station - Elevator A03N03 (Platform) Hydraulic Dupont Circle Station Elevator A03N03 (Platform) Hydraulic Elevator Audit Equipment Description Machine Room The machine room for this unit is located trackside and access is controlled. It shares the same machine room as the three escalators. The floor, controller, and pump unit have a thin layer of water, dust, and dirt and have not been cleaned recently. The lighting is insufficient to meet Code requirements and the working area in front of the controller is dim and would be improved with the installation of an additional lighting fixture. The closure on the machine room door is broken and the door will not self close or lock. There are many lights not working as well as junction boxes with exposed wiring and covers removed. The general cleanliness of the machine room is poor. Controller The controller is mounted adjacent to the pump tank unit with the cover securely fastened. The controller wiring is neat and securely fastened at all terminal connections with the spares tied off and tagged for accurate identification. Overall condition of the controller is good. Pump, Tank, and Valve Unit The unit is a dry pump type with the equipment mounted under the tank. The valve shows minor leakage at the couplings with a small accumulation of oil in the collection pan. All components have a minor build up of surface oil and dust. Car Top, Cab Door Equipment, and Operator The car top has a walk on platform mounted over the crosshead and door operating equipment. The platform is free of debris and neat in appearance with the car top operating box laying on the platform. The car top has a minor accumulation of dirt and debris that is very difficult to access to clean. The elevator is front opening with GAL door operator mounted on the car top. The door operator chains, link arms, tracks, trucks, and rollers are lubricated. The clutch is adjusted and operating correctly. The overall condition and operation of the cab door and associated equipment is good. Hoistway Door Equipment The hoistway door tracks, trucks, and rollers are dry; exhibiting minor rust and are in need of lubrication. The overall condition and operation of the hoistway doors and associated equipment is fair. Pit The elevator pit is relatively clean and free of debris and dirt. There are some small oil/water puddles in the pit which should be cleaned up. The jack packing is in good condition with only minor leakage normally associated with hydraulic applications. Overall condition of the pit is good. Signal Fixtures The signal fixtures are of a vandal proof design and construction. The surface finish of the fixtures is bronze. The surface of the car operating panel has minor scratches from abuse and vandalism consistent with mass transit applications. None of the damage is extensive enough to require replacement of the panels. The position indicator is digital and fully operational. All push buttons are intact and working correctly. The emergency communication device when activated contacted the station manager in the kiosk. Two-way communication was confirmed. 86

20 Dupont Circle Station - Elevator A03N03 (Platform) Hydraulic Cab The structural integrity of the cab remains intact. The wall panels, glass panels, dome, and ceiling are sufficient for continued use. The interior has minor damage, scratches, and dents from use, abuse, and vandalism normally associated with mass transit applications. General Observations Summary A03N03 1. The cleanliness of the unit was fair. 2. The adjustment and operation of the cab and hoistway doors and door equipment was good. 3. The lubrication condition of the unit was good. 87

21 Dupont Circle Station - Elevator A03N03 (Platform) Hydraulic Unit Photos Water entering below truss Junction box has no cover 88

22 Dupont Circle Station - Elevator A03N03 (Platform) Hydraulic Water in pit Entering water creating rust problems 89

23 Dupont Circle Station - Elevator A03N03 (Platform) Hydraulic Assessment Checklist 90

24 Dupont Circle Station - Elevator A03N03 (Platform) Hydraulic 91

25 Dupont Circle Station - Elevator A03N03 (Platform) Hydraulic Ride Quality Test Results Our measuring tool measures the speed and forces of hydraulic and traction elevators felt during elevator movement. It provides real-time performance information. Unit A03N03 failed in leveling in the down direction leveling in at a rate slower than 5 fpm. 92

26 Dupont Circle Station - Escalator A03N01 (Entrance) Dupont Circle Station Escalator A03N01 (Entrance) Escalator Audit This unit was not examined under major repair. 93

27 Dupont Circle Station - Escalator A03N01 (Entrance) Unit Photos N/A 94

28 Dupont Circle Station - Escalator A03N01 (Entrance) Assessment Checklist N/A 95

29 Dupont Circle Station - Escalator A03N01 (Entrance) Ride Quality Test Results N/A 96

30 Dupont Circle Station - Escalator A03N02 (Entrance) Dupont Circle Station Escalator A03N02 (Entrance) Escalator Audit Equipment Description: The escalator is a five-drive, Westinghouse modular. The assessment of the equipment and maintenance conditions was performed by VTX on August 19, Steps, Step Treads, and Risers The step tread and riser alignments appear to mesh within acceptable tolerances and show no excessive wear or damage. Normal wear consistent with mass transit applications is present on the step treads but no shaved or sharp edges consistent with misaligned steps exist. Skirts and Balustrade Panels The balustrade panels are secure with minimal gaps. The panels have a notable amount of damage commonly associated with mass transit applications. The skirt gaps are consistent at 5/32 along the rise of the unit. The units do use skirt brushes. The balustrade panels are solid on this unit. The balustrade panels are secure and show no damage. Decking and Anti-Slide Devices Decking is firmly in place with anti-slide devices. Handrails and Handrail Drive Units The handrails show minimal wear and are acceptable for continued use. The handrail drive chains appear acceptably adjusted, but are dry and in need of lubrication. Drive Unit and Reducer The drive sprockets drive chains and poly chains are well lubricated and free of dirt and debris. Examination of the wear patterns on the drive sprockets, drive, and poly chains show no unusual wear or damage indicating good alignment and tension of the equipment. The drive units show no signs of oil leakage at seals. No unusual noise or vibration was noted. Drive #1 brake cover missing Drive #2 and #4 auto grease lines cut. New auto grease lines installed on Drives #1, #3, and #5. Pit, Machine Room, and Trusses The machine room cabinets are covered with sheets of plastic as protection from water exposure. The attempt at protection is ineffective and creates an extremely hazardous working condition to any technician dispatched to work on the equipment. The upper and lower pit areas have a large accumulation of dirt and debris. The water issue needs to be addressed and viewed as Critical. Step Chains, Axles, and Step Chain Rollers The step chains are lubricated with a minimal build up of old lubricant. The axles and step chain rollers show normal wear patterns and are also in acceptable condition. Safety Switches A random visual inspection of the safety switches was performed. Multiple switches were manually activated and electrical operation verified. Of the switches checked all were adjusted and operating correctly. 97

31 Dupont Circle Station - Escalator A03N02 (Entrance) Controller The controller cabinet and all components within are securely mounted and in fair condition. The controller wiring is securely fastened at all terminal connections with the spares tied off and tagged for accurate identification. Overall condition of the controller is fair. General Observations Summary A03N02 (Entrance) 1. The cleanliness of the unit was fair Machine room cleanliness was poor. 2. The adjustment and operation of the switches and equipment was good. 3. The lubrication condition of the unit was fair. 98

32 Dupont Circle Station - Escalator A03N02 (Entrance) Unit Photos Water leak in machine room Flooding conditions in machine room 99

33 Dupont Circle Station - Escalator A03N02 (Entrance) Assessment Checklist 100

34 Dupont Circle Station - Escalator A03N02 (Entrance) Ride Quality Test Results N/A 101

35 Dupont Circle Station - Escalator A03N03 (Entrance) Dupont Circle Station Escalator A03N03 (Entrance) Escalator Audit Equipment Description: The escalator is a five-drive, Westinghouse modular. The assessment of the equipment and maintenance conditions was performed by VTX on August 19, Steps, Step Treads, and Risers The step tread and riser alignments appear to mesh within acceptable tolerances and show no excessive wear or damage. Normal wear consistent with mass transit applications is present on the step treads, but no shaved or sharp edges consistent with misaligned steps exist. Skirts and Balustrade Panels The balustrade panels are secure with minimal gaps. The panels have a notable amount of damage commonly associated with mass transit applications. The skirt gaps are consistent at 5/32 along the rise of the unit. The units do use skirt brushes. The balustrade panels are solid on this unit. The balustrade panels are secure and show no damage. Decking and Anti-Slide Devices Decking is firmly in place with anti-slide devices. Handrails and Handrail Drive Units The handrails show minimal wear and are acceptable for continued use. The nylon handrail guides at both the top and bottom of the unit are worn and in need of replacement. The handrail drive chains appear acceptably adjusted, but are dry and in need of lubrication. Drive Unit and Reducer The drive sprockets drive chains and poly chains are well lubricated and free of dirt and debris. Examination of the wear patterns on the drive sprockets, drive and poly chains show no unusual wear on Drives #1, #2, #4, and #5. Drive #3 both right and left side chains need replacement. The drive units show no signs of oil leakage at seals. No unusual noise or vibrations were noted on Drives #2, #3, #4, and #5. Drive #1 bearing noise and faulty brake. Note: Brake was scheduled for replacement after inspection. Drive #2, #3, and #4 auto grease lines cut. Step Chains, Axles, and Step Chain Rollers The step chains are acceptably lubricated with a minimal build up of old lubricant. The axles and step chain rollers show normal wear patterns and are also in acceptable condition. Pit, Machine Room, and Trusses The machine room cabinets are covered with sheets of plastic as protection from water exposure. The attempt at protection is ineffective and creates an extremely hazardous working condition to any technician dispatched to work on the equipment. The upper and lower pit areas have a large accumulation of dirt and debris. The water issue needs to be addressed and viewed as Critical. Safety Switches A random visual inspection of the safety switches was performed. Multiple switches were manually activated and electrical operation verified. Of the switches checked all were adjusted and operating correctly. 102

36 Dupont Circle Station - Escalator A03N03 (Entrance) Controller The controller cabinet and all components within are securely mounted and in fair condition. The controller wiring is securely fastened at all terminal connections with the spares tied off and tagged for accurate identification. Overall condition of the controller is fair. General Observations A03N03 (Entrance) 1. The cleanliness of the unit was poor- Machine room cleanliness was poor 2. The adjustment and operation of the switches and equipment was good. 3. The lubrication condition of the unit was fair. 103

37 Dupont Circle Station - Escalator A03N03 (Entrance) Unit Photos Lighting hanging from ceiling not properly attached Machine room equipment covered in tarps to prevent water damage 104

38 Dupont Circle Station - Escalator A03N03 (Entrance) Assessment Checklist 105

39 Dupont Circle Station - Escalator A03N03 (Entrance) Ride Quality Test Results N/A 106

40 Dupont Circle Station - Escalator A03N04 (North Platform) Dupont Circle Station Escalator A03N04 (North Platform) Escalator Audit Equipment Description: The escalator is a single-drive, Westinghouse Modular B100. The assessment of the equipment and maintenance conditions was performed by VTX on July 26, Steps, Step Treads, and Risers The step tread and riser alignments appear to mesh within acceptable tolerances and show no excessive wear or damage. Normal wear consistent with mass transit applications is present on the step treads, but no shaved or sharp edges consistent with misaligned steps exist. Skirts and Balustrade Panels The escalator skirt panels show no damage along the rise from step scraping. No metal shavings were noted along the step tracks inside the unit. The skirt gaps are consistent at 5/32 along the rise of the unit. The units do not use skirt brushes. The balustrade panels are glass on this unit. The balustrade panels are secure and show no damage. Decking and Anti-Slide Devices Decking is firmly in place with no anti-slide devices missing. Handrails and Handrail Drive Units The handrails show minimal wear and are acceptable for continued use. The right side handrail, while acceptable for continued use at this time, is dry and cracking and will require replacement in the near future. The nylon handrail guides at both the top and bottom of the unit are worn and in need of replacement. The handrail drive units are recessed within the skirt area and offer limited access for inspection. Of the area visible, the tension rollers appear to be in good condition. The handrail drive chains appear acceptably adjusted, but are dry and in need of lubrication. Drive Unit and Reducer The drive sprockets drive chains and poly chains are well lubricated and free of dirt and debris. Examination of the wear patterns on the drive sprockets, drive, and poly chains show no unusual wear or damage indicating good alignment and tension of the equipment. The drive units show no signs of oil leakage at seals. No unusual noise or vibration was noted. The maintenance motor is present, but appears unused. Step Chains, Axles, and Step Chain Rollers The step chains are acceptably lubricated with a minimal build up of old lubricant. The axles and step chain rollers show normal wear patterns and are also in acceptable condition. Pit, Machine Room, and Trusses The machine room / upper pit areas are free of dirt and debris. The accumulation of dirt and debris in the truss area and at the bottom pit of the unit is minor. Safety Switches A random visual inspection of the safety switches was performed. Multiple switches were manually activated and electrical operation verified. Of the switches checked all were adjusted and operating correctly. Controller The controllers are located in the upper pit area. The controller cabinet and all components within are securely mounted and in good condition. The controller wiring is neat 107

41 Dupont Circle Station - Escalator A03N04 (North Platform) and securely fastened at all terminal connections with the spares tied off and tagged for accurate identification. Overall condition of the controller is good. General Observations Summary A03N04 (North Platform) 1. The cleanliness of the unit was good. 2. The adjustment and operation of the switches and equipment was good. 3. The lubrication condition of the unit was good. 108

42 Dupont Circle Station - Escalator A03N04 (North Platform) Unit Photos Handrail guide No brake cover 109

43 Dupont Circle Station - Escalator A03N04 (North Platform) Dirt and dust buildup Handrail turnaround. (typical) 110

44 Dupont Circle Station - Escalator A03N04 (North Platform) Assessment Checklist 111

45 Dupont Circle Station - Escalator A03N04 (North Platform) Ride Quality Test Results The Parametricoder is a time and displacement encoding system that measures mechanical performance characteristics on escalators. It is able to secure additional performance data to allow individuals to assess conformance to design and operational parameters. It uses precision linear and rotational encoding systems, coupled with a robust data collection system, to permit simple field measurement of specific parameters of escalators and moving walks. The system has allowed us to clearly indentify key issues on client escalator systems including: Incorrectly adjusted and/or damaged brake systems Worn and damaged machine components including roller chain and gear sets Failed electrical control elements used in processes Summary: Escalator brakes have questionable stopping performance under no load. Brake torque may not hold a fully loaded unit the other issues if noted are identified in each performance category. 112

46 Dupont Circle Station - Escalator A03N04 (North Platform) 113

47 Dupont Circle Station - Escalator A03N04 (North Platform) 114

48 Dupont Circle Station - Escalator A03N05 (North Platform) Dupont Circle Station Escalator A03N05 (North Platform) Escalator Audit Equipment Description: The escalator is a single-drive, Westinghouse modular B 100. The assessment of the equipment and maintenance conditions was performed by VTX on July 27, Steps, Step Treads, and Risers The step tread and riser alignments appear to mesh within acceptable tolerances and show no excessive wear or damage. Normal wear consistent with mass transit applications is present on the step treads, but no shaved or sharp edges consistent with misaligned steps exist. Skirts and Balustrade Panels The escalator skirt panels show minor damage at several locations along the rise from step scraping. No metal shavings were noted along the step tracks inside the unit. The skirt gaps vary from 1/8 to 5/32 along the rise of the unit. The units do not use skirt brushes. The balustrade panels are glass on this unit. The balustrade panels are secure and show no damage. Decking and Anti-Slide Devices Decking is firmly in place with anti-slide devices missing. Handrails and Handrail Drive Units The handrails show minimal wear and are acceptable for continued use. The handrail drive units are recessed within the skirt area and offer limited access for inspection. Of the area visible, the tension rollers appear to be in good condition. The handrail drive chains appears acceptably adjusted, but is dry and in need of lubrication. Drive Unit and Reducer The drive sprockets drive chains and poly chains are well lubricated and free of dirt and debris. Examination of the wear patterns on the drive sprockets, drive and poly chains show no unusual wear or damage indicating good alignment and tension of the equipment. The drive units show no signs of oil leakage at seals. No unusual noise or vibration was noted. The maintenance motor is present but appears unused. Step Chains, Axles, and Step Chain Rollers The step chains are acceptably lubricated with a minimal build up of old lubricant. The axles and left hand step chain rollers show normal wear patterns and are also in acceptable condition. All horizontal step chain rollers have been replaced recently and show no unusual patterns of wear. No determinable cause that necessitated the need to change the rollers was readily identifiable. Pit, Machine Room, and Trusses The machine room / upper pit areas are free of dirt and debris. The accumulation of dirt and debris in the truss area and at the bottom pit of the unit is minor. Safety Switches A random visual inspection of the safety switches was performed. Multiple switches were manually activated and electrical operation verified. Of the switches checked all were adjusted and operating correctly. Controller The controllers are located in the upper pit area. The controller cabinet and all components within are securely mounted and in good condition. The controller wiring is neat 115