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Service call that the AC was not maintaining temperature in the home. Upon arrival, spoke with Mike Defrank about issue. Was informed that the system would run constantly and not maintain temperature. Was also informed that the system was icing up and leaking. Inspected Indoor Coil to ensure it was clear. Turned System on to test Operation. Supply and Return Temperature Differential was only at about 10 Degrees. Measured Refrigerant Pressures and System appeared to be low on Refrigerant. Superheat was at 45 Degrees and the VSAT was below freezing at 27 Degrees. Added a few ounces of Refrigerant and the Pressures immediately increased. Superheat remained high, but did decrease to 30 Degrees. The Temperature Differential was still low between 12-14 Degrees. Checked Fan Speeds and changed Cooling to the Med High Speed on the Fan. After changing the Fan Speed the Temperature Differential increased to about 19-20 Degrees, with the Refrigerant Pressures remaining about the same. It was not
Service call that the AC system for Coreyâ€™s Office and the adjoining Conference Room was not working. Upon arrival set the the Thermostat in Coreyâ€™s Office to cooling. Proceeded to the rooftop and found that the outdoor unit was not receiving the 24 Volts. After troubleshooting found the Interlock Safety Switch on the Condensation Pump was disconnected. Rewired Pump and the Outdoor Unit began running. Measured Refrigerant Charge on system and found to be low. Added 1-1/4 Lbs of R-22 Refrigerant. While testing the system, also found the Fan Speed was set to Low. Adjusted Fan Speed to High. Replaced the 20x20x1 Air Filter. Once the system had been running the Condensation Pump filled and failed to pump out. Tested Pump and found the Motor was failing. Removed Pump and installed a new 115V Condensation Pump. Wired new Pump Interlock Switch. Filled Pump to test Operation. Found Water in the Hallway and under further investigation found the Vinyl Tubing had been cut and abandoned. Recom
Service call that the First Floor System was not Cooling and the Indoor Coil was Frozen. System was turned off prior to arrival and coil had defrosted. Inspected Coil upon arrival and checked Air Filter. Put system in AC Mode and measured Refrigerant Charge. Supply and Return Differential was only 6 Degrees. Low VSAT temperature and High Superheat indicated that the system was low on Refrigerant. Added 2lbs of 410-A Refrigerant to System Charging by target Superheat of 12 Degrees. Once the system was fully charged, added UV Leak Dye into the System. If the system becomes low on Refrigerant again apse can search for the Leak using UV Lights and Glasses. Supply and Return Differential increased to 20 Degrees and the Refrigerant levels were to standards.
Installed new furnace coil and outdoor unit as well as a condensate pump and eztrap , new whip and disconnect. System was tested in both heating and cooling heating was fine ... we need to come back on a hot day and charge the ac I added one pound of refrigerant to the system but it was too cold outside to dial in the charge. The venting was changed on the roof and we added a foot and a half to the exhaust so we donâ€™t cycle the air..... also we connected the intake which was previously disconnected. The power for the outdoor unit is below the kitchen in the kitchen dist panel 27-29
Returned to site and checked Refrigerant Charge on system. Used Charging Jacket to verify Charge due to lower Outdoor Temperature. Found Pressures were lower than normal and Superheat Levels were high. Added 1 lb of 410-A Refrigerant to the System to decrease Superheat Levels. While checking Refrigerant Charge, cleaned Outdoor Coil with Water.
Performed Precision AC Tune Up on Mini Split System for the Telephone Room. Removed and cleaned Air Filters. Inspected Coils on Indoor and Outdoor Units. Inspected Electrical Connections on Units. Cleaned Condensation Pump for Indoor Unit. Measured Supply and Return Air Temperatures. The Blower Area on the Indoor Unit has mold and growth forming on the Blower Wheel and around it. Cleaned the Indoor Unit areas that were accessible.
Returned to site and Installed a new Dual 45/5 Mfd Capacitor and a new Super Boost Start Capacitor onto the Outdoor Unit. Repaired wiring connections that were worn and rusted for the Capacitor Wiring. Put system back in operation and tested.
Returned to site and installed a new A35 and A37 Belt onto System #2. Tested tension on new belts and adjusted. Put system in operation and measured Refrigerant Charge. Added 2lbs of R-22 Refrigerant to System. Measured Supply and Return Air Temperatures on System.
Performed Precision AC Tune Up on Amana System. Replaced the High Efficiency 313 Air Filter. Air Filter was very dirty. Inspected Electrical Components and Coil On Air Handler. Cleaned EZ Trap on the Condensation Drain Line. Tested Electrical Components on Outdoor Unit and measured Refrigerant. Due to rain and lower outdoor Temperature, Used Charging Jacket to verify Refrigerant levels. Measured Supply and Return Air Temperatures. System is operating to standards at this time.
Performed Precision Air Conditioning Tune Up on Trane AC System. Replaced the 20x20x1 Air Filter. Air Filter was very dirty and should checked/changed more frequently. Inspected Electrical Components on Air Handler and Outdoor Condenser. The Capacitor for the Outdoor Unit was testing at its lowest rating and was very rusted and in poor condition. Replaced the Dual Capacitor due to overall condition and rating. Measured Refrigerant Charge on system. While testing Refrigerant, found Pressures/Temperatures to be off due to being low on Refrigerant. Added 1lb of R-22 Refrigerant to the System, Charging by Subcooling and a Superheat. Superheat dropped by 5 Degrees and Subcooling was increased to 8 Degrees. Supply and Return Air Temperatures increased to 20 Degrees.
Performed Precision Air Conditioning Tune Ups on the Mini Split Systems for the Office and for the Small Lab Room. Was not able to access the Indoor Unit that supplies the Control Room. The Floor was recently tiled and I was not able to walk on the floor or set up the ladder due to the tiling. Will need to return after all flooring work is completed so that unit can be serviced. Cleaned Washable Filters for the other two systems. Inspected Main Electrical Components on the Indoor and Outdoor Units. Put Systems in AC Mode and measured Supply and Return Air Temperatures. Inspected Refrigeration Connections at the Outdoor Unit and used Leak Spray to ensure there were no leaks. Both systems were operating to standards at this time.
Performed Precision Air Conditioning Tune Ups for the two Daikin Mini Split Systems for the Student Lounge. Removed and Cleaned Filters on each indoor unit. Inspected and cleaned indoor Units. Inspected Main Electrical Wiring on the Indoor and Outdoor Units. Tested operation of each system in Air Conditioning Mode. Inspected Flare Fitting Connections on Refrigerant Lines and used Leak Spray to ensure they were sealed properly. System 3 appears to be used more than System 1. Unit #3 has some bacteria and growth around the Blower Wheel area. Measured Supply and Return Air Temperatures on each system. Both systems are operating to standards at this time.
Performed Precision Air Conditioning Tune Up on Mini Split System for the IT Room. Removed and Cleaned Washable Air Filters. Cleaned and Inspected Indoor and Outdoor Coils. Inspected Electrical Components on the Indoor Unit and on the Outdoor Unit. Checked Flare Fittings on Refrigerant Lines to ensure no leaks. Measured Supply and Return Air Temperatures on System which had a Delta between 18-19 Degrees. System is operating to standards.
Performed Precision AC Tune Up on the two systems for the Chapel. Checked Air Filters on both Units. Inspected Electrical Components on Indoor and Outdoor Units. Put systems into Air Conditioning Mode and measured Refrigerant Charges. The System for the Right Side of the Chapel has a Condensation Pump, however the Pump is not accessible behind the Duct Work. Could not access this Pump to clean out. The Blower Belts on both Systems are becoming dried and cracked. Recommend replacement of the Belts before they fail. Also recommend installing EZ Traps onto the Drain Lines and Wiring into the system as safety devices. Recommended replacing the Condensation Pump on the Left Side of the Chapel with a Pump that is wired into the system to shut the unit down if it becomes clogged or fails. Installing this style pump onto both systems would be advised, but did not include the second pump on estimate due to not being able to access.
Changed filter pressures looked ok drain was draining tons of bacteria growth outdoor coil fins are all smashed out and rusted.. systems in fair conditions.