Type: Posts; User: william smith
thank you i called robertshaw and that is correct
you asked how often the oil needed changed not how to put it in a contract but it not real hard to figure oil and labor once a year into it
pump each cir down and pump them up with nitrogen you will find your leak
oil pump will run in both diretion without hurting it
nine times out of ten if your burning up relays and startcap you are short cycling
what is the fastest way i use a liquid pump and chilled drums
all due respect but would you leave oil in your car for a year? there is no differance :):)
you have a leak put some pressure in the system and let stand
404a normaly runs about 300 to 325 head on a real hot day copeland recomeneds when useing blends to clear the sight glass once are use the 80 percent rule
as long as you have a 1/2 sightglass of oil and your oil pressure is at least 9 psi above your suction you will be fine thats why we have oilfailer switches to save compressors
just remember that in harvest you must have a full 1/2 inch supply of water and the water come out of the water valve not the sump sump is just for refigeration mode
at least once a year if condensers are old because during the summer high temp tend to cause your driers to break down from heat i would recommend changing the oil at the end of the summer also...
The differents is one is reading evap temp and the other is reading air temp you can put the bulb in the return air and set it at 35 is the samething as setting it at a coil temp of 15 on say 409a...
your txv should be at least a 1/4 ton less than your condenser if you have a 2ton system you need to use a 1-1/2 ton valve they dont make a1-3/4 ton valve
you need pt chart and just remeber what evap temp you need to achive your temp to run -10 on 404a you need to be running about 20 psi that give you about -10 coil 404a is a replacement for 502 so is...
Do you have hot gas are eletric defrost heaters what type refrigerant are you useing sound like you could have a bad valve in your compressor
How would you check a milivolt gas valve for ground