Potomac, MD Air Conditioning, Heating and Plumbing Services
Supreme Air provides Air Conditioning, Heating and Plumbing Services, Repair, Installation, Maintenance, and Tune Up in Potomac, MD and surrounding areas.
Check out what some of our customers are saying about Supreme Air.
for Potomac, MD
Hobbins - Potomac, MD
Very devoted to do great work!
Jim - Potomac, MD
Chris was great. He was realistic and talked about how best to approach the problems we have.
Wire pump relay. The pump for unit #3 was not coming on. If one of the other units was running then enough water was moving through the unit for it to operate, which is what happened when I charged it. I wired 24 volts to the pump relay and tested the unit. Unit operating normal. Customer to call the office to discuss service membership. I know we talked about it before but for whatever reason getting the units up and running was priority.
I replaced the heating txv. Leak checked the system, flushed it out and pulled into a deep vacuum. I charged the system until I had normal operating pressures and normal temperature rise at the air handler. Unit is operating normal. Repair has been paid in full.
I replaced the reversing valve which had been disassembled by a previous serviceman. I pressure tested the system and went to test it and found the txv for heating is not opening and the system pulls into low pressure despite having adequate charge. The txv was most likely the original problem but there was no way for me to know. Customer paid 477 toward replacing the txv.
Find refrigerant leak in unit #2, fix the leak, flush the system and charge using r22 substitute refrigerant. I found the leak in the bend of the suction line just before the compressor. I believe the pipe was bent during manufacturing and had a crack which they brazed but it was leaking at the edges of the braze. I cleaned it with wire brush and sand paper and used silver brazing compound to help etch out the copper. I laid a thick braze over entire area. I pressurized and let it hold pressure for 15 minutes. I pulled it into a vacuum of 400 microns and when I turned the pump off it never increased. I charged the unit with 7 lbs 8 oz of Nu22. There was no system total charge information so I charged until I had 10 degrees superheat and 11-12 degrees subcooling and normal temperature rise. Unit #2 is operating normal. Unit #3 needs a reversing valve and the customer paid $1000 as a deposit for this repair. I completed a part order form. The office will contact customer for scheduling
Unit #2 has a refrigerant leak somewhere in the system. I feel that itâ€™s in the cube portion but nitrogen will need to be added to be sure of its exact location and that there is only one leak. I did not want to spoil the charge tonight because it is heating somewhat. Itâ€™s r22 refrigerant so once the leak is identified and fixed of its in a place that can be fixed, replacement r22 will be added to specification. Customer paid $600 tonight.
On arrival found system locked on fp1 ,reset system ,checked system pressures refrigerant and water .i then increased water flow to 70 % minimum and 100 max on both system .also spoke to tech support and we found that system is operating normal at this time .
On arrival found systems are operating normal,checked history and found unit 2 did lock on fp1 4 times.called water furnace and advised me to increase min vs to 60 instead of 45% and leave the other unit at 45% since it didn't lock again .units are operating normal at this time
Performed preventative maintenance on both hybrid systems. For gas furnaces, I cleaned flame sensors, measured ohms of igniters, measured rating of run capacitors, inspected heat exchangers. Ran furnaces and checked amperage of blower and inducer motor, measured heat rise. Furnaces operating normal. For Geothermal units, measured ratings of compressor capacitors, checked contactors, flushed out drains, and checked cleanliness of blowers and coils. Ran geothermal units. Measured amp draw of compressors, blowers, and loop pumps. Measured delta loop pressures and temps as well as delta air temps. Ran humidifier and checked operation. Turned Humidistat on and set to 45%. Units are operating normal at this time.
On arrival found system operating normal ,checked fault history,found system did locked on fp1 .raised vs to 45 minimum and 100 max instead of 25 and 75 . Units are operating normal at this time
Fall pm on11/21/18 On arrival set unit to call for heat measured supply and return air temp measured voltage and amps inspected electrical connections checked drain and cleaned checked filter recommended to install UV lights unit operating normal at this time.
Working on Furnace Maintenance in Potomac, MD.