Montgomery Village, MD Air Conditioning, Heating and Plumbing Services
Supreme Service Today provides Air Conditioning, Heating and Plumbing Services, Repair, Installation, Maintenance, and Tune Up in Montgomery Village, MD and surrounding areas.
Check out what some of our customers are saying about Supreme Service Today.
for Montgomery Village, MD
I replaced the txv and refrigerant filter drier. I pressure tested the system to 400psi with dry nitrogen and then pulled into a <500 micron vacuum. I charged the unit with 5lb 2oz of r410a refrigerant. I cycled the unit on second stage heating and cooling and observed normal refrigerant pressures and delta temperatures across the air coil in each mode. Unit is without refrigerant leaks and charged to specification. Unit operating normal. I retained the faulty txv to return to Water Furnace.
In performing the maintenance I found the txv valve is not modulating the refrigerant. I isolated the sensing bulb and dunked it in hot and cold water and the suction pressure never changes. I called WF tech support and was given a Case # and they warrantied the txv valve and a new filter drier. All other aspects of the unit are operating normal but unit has low temperature rise and low heat of extraction.
The air filter had recently been replaced by the customer. I cleaned the condensate pan and drain lines and ran hot water to flush the debris and to check for proper drainage. I checked the electrical wiring and electrical systems, all are within specification. I operated the unit on second stage cooling mode and recorded 20+ degree delta temperatures across the evaporator coil. I confirmed proper flow rate and heat of rejection. I pressurized the ground loop to 65 psi. Unit operating normal.
Customer showed me an info graphic regarding energy use at the home and it improved greatly since the refrigerant issue but is still slightly higher than what it says is average. I replaced the filter and operated the unit on second stage heating mode. Temperature rise was lower than expected so I looked at blower speeds and they were at 3,6,9,11, so I set them to the numbers in the manual 3,5,7,9 and this quickly brought the temperature rise to over 25 degrees which is normal and the heat of extraction was normal. These numbers tell me the refrigerant levels are where they should be at this point. Also the unit should have to run less to heat and coil the home to set point which should reduce energy consumption. I checked the electrical wiring and electrical systems, including auxiliary heat and all are within specification. The unit is operating normal.