DMan
buh bye
- Joined
- May 25, 2001
- Messages
- 499
Hello,
I converted my R12 to 134a a while back and I have some questions. FYI, when I did the replacement, I changed the expansion valve, the drier, lubricant. I can't recall if I flushed the system..but I did use my vacuum pump to evacuate. Here we go:
Q1. I performed an archive search and someone there mentioned I should be shooting for 200psi on the high side with 134a. Is that still valid? Whats the corresponding low side pressure?
Q2. I added about 2.5 cans of 134a to the A/C system when I recharged it the other day. When I started, high side pressure was about 20 psi..when I was done High side pressure was about 95-100psi. The system was blowing *cool* air but I wouldn't say *COLD*. Sorry for the temperature descriptors - I didn't have my Fluke temp gauge handy. Anyway, do I have room to add more refrigerant? Should pressure be my guide?
Q3. If I keep adding and my pressure doesn't go up, I guess I should be looking for a leak. Is it possible the original compressor is 'weak', or is that not a normal failure mode?
Q4. Last q - which way do I hold the stinkin can when I recharge? Right side up or upside down? I've seen directions for both ways..does it matter?
Thanks in advance,
Denis Kefallinos
I converted my R12 to 134a a while back and I have some questions. FYI, when I did the replacement, I changed the expansion valve, the drier, lubricant. I can't recall if I flushed the system..but I did use my vacuum pump to evacuate. Here we go:
Q1. I performed an archive search and someone there mentioned I should be shooting for 200psi on the high side with 134a. Is that still valid? Whats the corresponding low side pressure?
Q2. I added about 2.5 cans of 134a to the A/C system when I recharged it the other day. When I started, high side pressure was about 20 psi..when I was done High side pressure was about 95-100psi. The system was blowing *cool* air but I wouldn't say *COLD*. Sorry for the temperature descriptors - I didn't have my Fluke temp gauge handy. Anyway, do I have room to add more refrigerant? Should pressure be my guide?
Q3. If I keep adding and my pressure doesn't go up, I guess I should be looking for a leak. Is it possible the original compressor is 'weak', or is that not a normal failure mode?
Q4. Last q - which way do I hold the stinkin can when I recharge? Right side up or upside down? I've seen directions for both ways..does it matter?
Thanks in advance,
Denis Kefallinos