Salem, NH

I replaced a faulty compressor on a commercial air conditioning unit. The unit had been running inefficiently, causing inconsistent cooling throughout the building. I installed a new Copeland Scroll compressor and replaced the refrigerant with R-410A. After testing for leaks and ensuring proper airflow, the system was restored to full operation, providing consistent cooling once again.

I completed the replacement of an outdated rooftop AC unit with a new Carrier 10-ton unit. The old unit was experiencing frequent breakdowns and inefficiency. I removed the old unit, set up the new system, and connected it to the building’s existing ductwork. I also installed a Honeywell programmable thermostat to enhance system control. After testing, the new AC provided improved airflow and cooling.

I responded to a commercial HVAC system with insufficient cooling due to a malfunctioning evaporator coil. I shut down the system, cleaned the clogged coil, and refilled the system with the appropriate level of R-22 refrigerant. The repair restored proper cooling performance, ensuring the system could handle peak temperatures efficiently.

I installed a Trane 20-ton rooftop HVAC unit for a commercial client needing a reliable heating system. I connected the unit to the building’s gas line and installed a Lennox air filter system for improved air quality. After calibrating the system and testing heat distribution, the new unit performed efficiently, providing even heating throughout the facility.

I repaired a walk-in cooler experiencing temperature fluctuations. The issue was traced to a faulty thermostat and a worn condenser fan motor. I replaced both components, using a Danfoss thermostat and a new Emerson fan motor. After testing and adjusting the temperature settings, the cooler maintained a stable temperature, preventing further loss of perishable goods.

I installed a new Goodman 5-ton rooftop AC unit for a commercial office. I positioned the unit, connected the electrical lines, and sealed the ductwork. I installed a Johnson Controls thermostat to enhance temperature control. After testing airflow and checking for leaks, the new unit provided optimal cooling for the office space, improving employee comfort.

Repaired Daikin VRV IV heat recovery system. Diagnosed communication error between outdoor unit and branch selector boxes. Replaced faulty F1/F2 transmission wiring. Updated outdoor unit PCB firmware. Checked refrigerant charge in all circuits, adjusted subcooling. System now maintaining proper temperature in all zones.

Serviced Lennox LCH240H4B heat pump. Cleaned condenser coil with Nu-Calgon Tri-Pow'r HD, straightened bent fins. Replaced failed dual-run capacitor and contactor. Checked refrigerant charge, added 1.5 lbs R-410A. Calibrated Honeywell T6 Pro thermostat. Heat pump now heating and cooling efficiently.

Overhauled Baltimore Aircoil Company BAC 3000 cooling tower. Replaced deteriorated fill media with new BAC CrossFlute fill. Cleaned distribution nozzles, adjusted water flow. Repaired cracked fiberglass basin, applied Belzona 5811 epoxy coating. Replaced fan motor and drive shaft. Balanced fan assembly using Fluke 810 vibration tester. Cooling tower efficiency increased by 15%.

Repaired Hoshizaki KM-1340MAH ice machine. Diagnosed scale buildup on evaporator. Disassembled unit, cleaned scale using Nu-Calgon Nickel-Safe Ice Machine Cleaner. Replaced water pump, inlet water valve, and bin control thermostat. Sanitized food zone with Nu-Calgon IMS-III. Adjusted water level, freeze cycle time.

Serviced York YZ centrifugal chiller. Performed oil analysis, replaced oil filter. Inspected magnetic bearings, adjusted clearances. Cleaned condenser tubes using Goodway RAM-PRO-XL tube cleaner. Checked refrigerant charge, topped off with R-1233zd. Tested all safeties, updated control firmware. Chiller efficiency improved by 8%.

Repaired Trane Intellipak SXHFC commercial chiller. Diagnosed faulty electronic expansion valve (EEV). Removed old Sporlan SEI-30 valve, installed new SEI-30 with updated software. Recalibrated valve using Trane Tracer software. Checked refrigerant charge, adjusted superheat. Chiller now maintaining proper leaving water temperature.

Replaced faulty compressor in Carrier 48HC rooftop unit. Recovered R-410A refrigerant, removed old compressor, installed new Copeland ZP51K5E-PFV scroll compressor. Brazed connections using oxy-acetylene torch, pressure tested with nitrogen, vacuumed system, and recharged. Checked amperage draw and superheat/subcooling. Unit now cooling properly.

Performed routine maintenance on a Carrier WeatherMaker 7.5 Ton 208/230V 3 Phase Rooftop Unit in Boston, MA. Inspected components, cleaned the condenser coils, and tested the refrigerant charge. All systems are functioning well, and the customer is satisfied with the service.

Performed comprehensive maintenance on a Carrier 48HC rooftop unit at a local office building. Cleaned condenser coils using Nu-Calgon Evap Pow'r-C. Replaced clogged air filters with MERV 13 pleated filters. Inspected and tightened electrical connections with Klein Tools torque screwdriver. Lubricated fan motors using Supco synthetic lubricant. Checked refrigerant charge with Fieldpiece SMAN460 digital manifold. Calibrated Honeywell T6 Pro thermostat for optimal performance.

Repaired a Kolpak walk-in refrigerator today. Diagnosed faulty Copeland Scroll compressor using Fluke 87V multimeter. Replaced compressor and Sporlan filter drier. Evacuated system with JB Industries DV-142N vacuum pump. Recharged with R-404A refrigerant using Yellow Jacket 42006 manifold gauge set. Installed new Dixell XR75CX digital controller. Tested system operation, verifying proper temperature maintenance and defrost cycles.

Completed a commercial energy audit. Used a Fluke 1730 Energy Logger to monitor energy consumption and identify inefficiencies. Inspected HVAC systems, lighting, and insulation. Utilized a Testo 875-2i thermal imager to detect heat loss and pinpoint insulation issues. Provided a detailed report with recommendations for energy-saving improvements to enhance overall efficiency and reduce operational costs.

Repaired Trane XR16 air conditioner in Attleboro, MA commercial space. Replaced faulty compressor and recharged system with R-410A refrigerant. Installed new Honeywell thermostat for improved control. Conducted thorough testing to verify optimal system operation and climate control performance.

Performed commercial zoned AC repair. Diagnosed an issue with the Trane Varitrac zoning system. Replaced a faulty zone controller and recalibrated the dampers. Used a Fluke 179 Multimeter to test electrical connections and a Bacharach H10 Pro leak detector to check for refrigerant leaks. Ensured each zone was cooling effectively and the system was running efficiently.

This morning, I repaired a commercial HVAC system experiencing inconsistent cooling. I identified a faulty TXV (Thermostatic Expansion Valve) and replaced it with a Sporlan valve. Using a digital manifold gauge, I recharged the system with R-410A refrigerant to the correct levels. I also checked and recalibrated the building’s VAV (Variable Air Volume) boxes to ensure even temperature distribution. Finally, I inspected the air handler and cleaned the evaporator coils for optimal performance.

I installed a new Carrier 48HC-D high-efficiency rooftop unit today. First, I secured the 20-ton unit to the commercial building's roof curb per specifications. The thermostat control wiring was connected, and refrigerant linesets were carefully evacuated using a Yellowjacket recovery machine. With a tight vacuum achieved, I charged the system with R-410A refrigerant following Carrier's subcooling targets. The economizer was adjusted for proper ventilation operation.

I completed a repair on a Trane Voyager commercial rooftop unit today. The 15-ton gas/electric unit was experiencing low cooling capacity. Upon inspection, the condenser coils were severely fouled with cottonwood seed debris. Using a 4000 PSI pressure washer, I thoroughly cleaned the coils. The condenser fan motors were seized, so I replaced them with new Genteq motors. After a full system evacuation, I recharged with R-410A to factory specifications. The Trane unit's airflow, superheat, and subcooling were brought back within recommended parameters. Proper cooling is now restored to the commercial space.

I installed a new Hussmann RL4N-G refrigerated merchandiser today. First, I leveled and sealed the unit per manufacturer specifications. The pre-charged refrigeration system was evacuated and leak tested using a Fieldpiece LS3X heated sensor leak detector. Then, the R-404A refrigerant charge was adjusted to achieve optimal superheat and subcooling values. The digital thermostat was calibrated for precise temperature control.

I repaired a commercial HVAC system experiencing airflow issues. I replaced the faulty blower motor with a Genteq 1/2 HP motor and adjusted the belt tension. Using a manometer, I checked and calibrated the system's static pressure to ensure optimal airflow. Finally, I inspected the filters and ductwork to confirm there were no additional blockages or issues.

I repaired a True TFM-72 upright commercial freezer today. The issue was faulty defrost cycle operation. I replaced the defrost timer and thermostat, performed an evacuation, and recharged the system with R-404A refrigerant. The evaporator coils were cleaned using NuCalgon Evap-Fresh No-Rinse condenser cleaner. After adjusting the temperature controller, the freezer is maintaining optimal temperature range.