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Hello and welcome to just answer my name is ***** ***** I will be the one who will assist you. Do you have a recovery pump?
No was thinking about getting one. I do have a vacuum pump. But would definitely like to be able to use the vacuum pump if possible.
I found an instance in where it was done.
What about a new unit?
I personally have never used a vacuum to do this its always been a recovery pump so I will open this up for you and see if someone who has done it can further assist you.
Ok... how to determine what the best a/c refridgerant recovery unit to purchase for home and auto use.
my name is Billy. 25+ years of using recovery machines and vacuum pumps.
The vacuum pump is only made to create a vacuum, not transfer refrigerant.
To actually remove refrigerant you need a recovery machine.
If you tell me what type of jobs you do and how often I can tell you what you should be looking at.
Auto 134 and sometimes R22, R421A and such.
ok so no large projects involving 20 lbs or more at a time?
Then you would like something smaller like the Robinaire RG3000. Around $450 but compact and does a good job.
For larger scale I would look at Appion
I am familiar with the f6...let me check specs for an f5
What about using the heat pump compressor (unit) to discharge the refrigerant into a container with a vacuum?
This also not possible.
Do you just have a unit you are trying to get empty for a replacement?
I cannot find pertinent info on a F5..only the F6.
You can recover the refrigerant and reuse.
Is your project inside the outdoor unit or in the line set or indoor unit?
if you are not actually in the heat pump..replacing compressor, reverse valve....you can push the refrigerant into the coil, shut vales and lock the refrigerant in the outdoor unit and then unhook lines...but if the outdoor unit itself is being opened up you need a recovery machine...AND a vacuum pump for when ready.
The F6 would be very acceptable....a little more machine than you need for light use.
ok first, did you vacuum the system when done?
Also you appear undercharged. What is the temp outside and inside when you took those readings
and are those readings while running?
when you charged the unit...did you charge mostly with liquid?
Are you at the site right now?
I would like you to charge the unit until the red gauge is closer to 255-260.
Once at that point tell me what the blue side gage is at.
no problem just reply when ready.
The 90% is to start watching it at that point as it depends on metering device for final op.
You may have to go 100% or a bit more...
any refrigerant gages as long as the red goes to smaller 3/8's line and the blue to the larger with black rubber on it
Those gages will still work great
correct....start unit and tell me pressures
i cannot make out the blue gage...what is psi reading?...id the larger line with black rubber cool or sweating yet?
and at 91 degrees lets charge to red gage to 265 now.
is the indoor blower running ok, Clean filter? doors on the blower unit inside? good air flow from register?
Or was there any frost/ice on the black rubber line at the indoor unit?
and blower is running good with good air flow out the registers?
You have a blower inside correct? I want to make sure all air flow is going through coil and doors are on the indoor unit and not off the unit...basically I am asking if the indoor blower is all together.
And did we charge it to 265 yet
can you post a pic of the indoor unit?
are we at 265psi on red gage yet?
thats because you have automotive gages...I thought you had an adapter or had used those gages. You need r22 gages..the ones you have are for 404, 134 etc..
I have to go offline for 30 min but will respond as soon as I can. At this point we still need to raise the pressure a bit.
when the fan turns the lower edge should be leading. The air should be blown upward out of unit
ok so fan is correct now...and we still need to get the head pressure to 265ish
we still are undercharged
Here is the summary thus far.
There is too little freon in the system right now...as it circulates through the indoor coil it is being used up quickly.
We need to increase the head pressure b adding refrigerant until we are at 265-270 with an outdoor temp of 90.
Take the blue hose...move to center in place of yellow.
Leave red attached to unit.
make sure blue knob is shut down....then meter in refrigerany by opening the tank valve and the red knob...turn off red knob when 265-270 and tell me if the black rubber line is getting cooler.
NOTE...this is not how I would normally instruct...I am just trying to help you get by
I am going to change something here and have you charge it while running.
Move RED hose to center..set yellow aside.
Attach blue hose from blue knob side of gage to to the larger pipe service fitting
Red hose is attached to tank of refrigerant and goes to center gage port.
open tank valve
red gage valve closed
Tank upside down
while running slowly open blue knob tell me if the blue side gage rises while charging
Only do this for about a minute.
Then swap hoses back to where you can take a pressure reading with red gage attached to skinny line
yes it is correct...once unit runs that pressure will drop
The refrigerant issues vs fan are not related.
It appears the fan motor may be defective but that is open to troubleshooting.
As far as the gages I guess we wait until we have working gages