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Carrier 4 ton RTU. Called for second opinion. Other company said the evap manifold needed replaced due to low suction pressure. Opened the blower door to find blower and motor sheaves completely worn out and belt coming apart. Tightened belt as much as I could as a temporary and system started working properly. Within 15 minutes load had pulled down from 78 to 75 and dropping. Get to go back and replace parts but atleast it will keep them going till they come in.
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A lot of work and coordination goes into changing a chiller. We removed an 80's Carrier screw and installed a new Daikin WMC with Turbocores. This required rigging crew, pipe fitters, plumbers, electricians, controls, chemical treatment, and myself as mechanical/foreman.
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LG multi V 4 was having trouble keeping up with space. Superheat was in 30's and subcooling was 2-4°F. Compressors were also running unloaded. Charged system up until it was able to load up and started pulling load down on the space. VRF system do not charge and operate the same as a standard system and tech support will always tell you it can not be done but there is a pattern and ability of getting a operational charge on a system when needed.
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Leaks leaks and more LEAKS!!!! Its that time of year. When your leak searching charge some trace refrigerant before you pressure with nitrogen. It is much easier and cleaner to electronic leak search then use bubbles to verify. Make sure you maintenance your detector by either changing filter, replacing the sensing elements, and keeping batteries changed/charged.
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When changing sheaves and motors it is crucial to do a proper alignment. If you have not invested and trained on laser alignment tools the time is now. This is becoming a more and more requested service from the customers. Alignments are also very important to motor, sheave, bearing, and belts life! Improper alignment or to tight of belt adjustment will cause short life span on components. #hvacproblems #hvactips #refrigeration #hvacwork #hvactime #hvachacks #hvaclifestyle #hvacmeme #hvactools #hvactech #hvactraining #hvac #hvacr #hvactechnician #hvacquality #hvaclife #makingmen1unitatatime #troubleshooting #hvactroubleshooting
Evap coil cleaning. .7" static drop across coil before and .2" after cleaning.
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